diff --git a/.deny.toml b/.deny.toml
index e65cdd34..57b5f759 100644
--- a/.deny.toml
+++ b/.deny.toml
@@ -14,6 +14,8 @@ ignore = [
   { id = "RUSTSEC-2025-0141", reason = "`bincode` is unmaintained but continuing to use it." },
   { id = "RUSTSEC-2023-0089", reason = "atomic-polyfill is pulled transitively via risc0-zkvm; waiting on upstream fix (see https://github.com/risc0/risc0/issues/3453)" },
   { id = "RUSTSEC-2026-0097", reason = "`rand` v0.8.5 is present transitively from logos crates, modification may break integration" },
+  { id = "RUSTSEC-2026-0118", reason = "`hickory-proto` v0.25.0-alpha.5 is present transitively from logos crates, modification may break integration"},
+  { id = "RUSTSEC-2026-0119", reason = "`hickory-proto` v0.25.0-alpha.5 is present transitively from logos crates, modification may break integration"},
 ]
 yanked = "deny"
 unused-ignored-advisory = "deny"
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 02381dfc..f10532a8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -225,7 +225,7 @@ jobs:
       - uses: ./.github/actions/install-risc0
 
       - name: Install just
-        run: cargo install just
+        run: cargo install --locked just
 
       - name: Build artifacts
         run: just build-artifacts
diff --git a/Cargo.lock b/Cargo.lock
index 73fbb12a..60286441 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -627,6 +627,51 @@ version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7c02d123df017efcdfbd739ef81735b36c5ba83ec3c59c80a9d7ecc718f92e50"
 
+[[package]]
+name = "asn1-rs"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56624a96882bb8c26d61312ae18cb45868e5a9992ea73c58e45c3101e56a1e60"
+dependencies = [
+ "asn1-rs-derive",
+ "asn1-rs-impl",
+ "displaydoc",
+ "nom 7.1.3",
+ "num-traits",
+ "rusticata-macros",
+ "thiserror 2.0.18",
+ "time",
+]
+
+[[package]]
+name = "asn1-rs-derive"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3109e49b1e4909e9db6515a30c633684d68cdeaa252f215214cb4fa1a5bfee2c"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+ "synstructure",
+]
+
+[[package]]
+name = "asn1-rs-impl"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b18050c2cd6fe86c3a76584ef5e0baf286d038cda203eb6223df2cc413565f7"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
+[[package]]
+name = "asn1_der"
+version = "0.7.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4858a9d740c5007a9069007c3b4e91152d0506f13c1b31dd49051fd537656156"
+
 [[package]]
 name = "astral-tokio-tar"
 version = "0.6.1"
@@ -677,6 +722,36 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "async-channel"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "924ed96dd52d1b75e9c1a3e6275715fd320f5f9439fb5a4a11fa51f4221158d2"
+dependencies = [
+ "concurrent-queue",
+ "event-listener-strategy",
+ "futures-core",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "async-io"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "456b8a8feb6f42d237746d4b3e9a178494627745c3c56c6ea55d92ba50d026fc"
+dependencies = [
+ "autocfg",
+ "cfg-if",
+ "concurrent-queue",
+ "futures-io",
+ "futures-lite",
+ "parking",
+ "polling",
+ "rustix",
+ "slab",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "async-lock"
 version = "3.4.2"
@@ -694,6 +769,17 @@ version = "0.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4288f83726785267c6f2ef073a3d83dc3f9b81464e9f99898240cced85fce35a"
 
+[[package]]
+name = "async-recursion"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b43422f69d8ff38f95f1b2bb76517c91589a924d1559a0e935d7c8ce0274c11"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "async-stream"
 version = "0.3.6"
@@ -727,6 +813,19 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "asynchronous-codec"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a860072022177f903e59730004fb5dc13db9275b79bb2aef7ba8ce831956c233"
+dependencies = [
+ "bytes",
+ "futures-sink",
+ "futures-util",
+ "memchr",
+ "pin-project-lite",
+]
+
 [[package]]
 name = "ata_core"
 version = "0.1.0"
@@ -760,6 +859,29 @@ version = "1.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
 
+[[package]]
+name = "attohttpc"
+version = "0.24.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8d9a9bf8b79a749ee0b911b91b671cc2b6c670bdbc7e3dfd537576ddc94bb2a2"
+dependencies = [
+ "http 0.2.12",
+ "log",
+ "url",
+]
+
+[[package]]
+name = "attohttpc"
+version = "0.30.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "16e2cdb6d5ed835199484bb92bb8b3edd526effe995c61732580439c1a67e2e9"
+dependencies = [
+ "base64 0.22.1",
+ "http 1.4.0",
+ "log",
+ "url",
+]
+
 [[package]]
 name = "attribute-derive"
 version = "0.10.5"
@@ -806,7 +928,7 @@ dependencies = [
  "axum-core 0.4.5",
  "bytes",
  "futures-util",
- "http",
+ "http 1.4.0",
  "http-body",
  "http-body-util",
  "hyper",
@@ -840,7 +962,7 @@ dependencies = [
  "bytes",
  "form_urlencoded",
  "futures-util",
- "http",
+ "http 1.4.0",
  "http-body",
  "http-body-util",
  "hyper",
@@ -875,7 +997,7 @@ dependencies = [
  "async-trait",
  "bytes",
  "futures-util",
- "http",
+ "http 1.4.0",
  "http-body",
  "http-body-util",
  "mime",
@@ -894,7 +1016,7 @@ checksum = "08c78f31d7b1291f7ee735c1c6780ccde7785daae9a9206026862dab7d8792d1"
 dependencies = [
  "bytes",
  "futures-core",
- "http",
+ "http 1.4.0",
  "http-body",
  "http-body-util",
  "mime",
@@ -905,6 +1027,17 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "backon"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cffb0e931875b666fc4fcb20fee52e9bbd1ef836fd9e9e04ec21555f9f85f7ef"
+dependencies = [
+ "fastrand",
+ "gloo-timers 0.3.0",
+ "tokio",
+]
+
 [[package]]
 name = "base-x"
 version = "0.2.11"
@@ -957,24 +1090,6 @@ version = "1.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2af50177e190e07a26ab74f8b1efbfe2ef87da2116221318cb1c2e82baf7de06"
 
-[[package]]
-name = "bedrock_client"
-version = "0.1.0"
-dependencies = [
- "anyhow",
- "common",
- "futures",
- "humantime-serde",
- "log",
- "logos-blockchain-chain-broadcast-service",
- "logos-blockchain-chain-service",
- "logos-blockchain-common-http-client",
- "logos-blockchain-core",
- "reqwest",
- "serde",
- "tokio-retry",
-]
-
 [[package]]
 name = "bincode"
 version = "1.3.3"
@@ -1101,7 +1216,7 @@ dependencies = [
  "futures-util",
  "hex",
  "home",
- "http",
+ "http 1.4.0",
  "http-body-util",
  "hyper",
  "hyper-named-pipe",
@@ -1354,17 +1469,6 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "613afe47fcd5fac7ccf1db93babcb082c5994d996f20b8b159f2ad1658eb5724"
 
-[[package]]
-name = "cfg_eval"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "45565fc9416b9896014f5732ac776f810ee53a66730c17e4020c3ec064a8f88f"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.117",
-]
-
 [[package]]
 name = "chacha20"
 version = "0.10.0"
@@ -1374,6 +1478,7 @@ dependencies = [
  "cfg-if",
  "cipher 0.5.1",
  "cpufeatures 0.3.0",
+ "rand_core 0.10.1",
 ]
 
 [[package]]
@@ -1973,6 +2078,20 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "der-parser"
+version = "10.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "07da5016415d5a3c4dd39b11ed26f915f52fc4e0dc197d87908bc916e51bc1a6"
+dependencies = [
+ "asn1-rs",
+ "displaydoc",
+ "nom 7.1.3",
+ "num-bigint 0.4.6",
+ "num-traits",
+ "rusticata-macros",
+]
+
 [[package]]
 name = "deranged"
 version = "0.5.8"
@@ -2123,10 +2242,21 @@ dependencies = [
 ]
 
 [[package]]
-name = "docker-compose-types"
-version = "0.22.0"
+name = "dlopen2"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7edb75a85449fd9c34d9fb3376c6208ec4115d2ca43b965175a52d71349ecab8"
+checksum = "09b4f5f101177ff01b8ec4ecc81eead416a8aa42819a2869311b3420fa114ffa"
+dependencies = [
+ "libc",
+ "once_cell",
+ "winapi",
+]
+
+[[package]]
+name = "docker-compose-types"
+version = "0.23.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ea51e75cfa9371c4d760270c3da13516d7206121d668c1fbdd6fd83d1782b0f"
 dependencies = [
  "derive_builder",
  "indexmap 2.13.0",
@@ -2177,6 +2307,12 @@ version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "669a445ee724c5c69b1b06fe0b63e70a1c84bc9bb7d9696cd4f4e3ec45050408"
 
+[[package]]
+name = "dtoa"
+version = "1.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4c3cf4824e2d5f025c7b531afcb2325364084a16806f6d47fbc1f5fbd9960590"
+
 [[package]]
 name = "duplicate"
 version = "2.0.1"
@@ -2215,6 +2351,7 @@ version = "2.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "115531babc129696a58c64a4fef0a8bf9e9698629fb97e9e40767d235cfbcd53"
 dependencies = [
+ "pkcs8",
  "serde",
  "signature",
 ]
@@ -2316,6 +2453,18 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "enum-as-inner"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1e6a265c649f3f5979b601d26f1d05ada116434c87741c9493cb56218f76cbc"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "enum-map"
 version = "2.7.3"
@@ -2501,12 +2650,12 @@ checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
 
 [[package]]
 name = "ferroid"
-version = "0.8.9"
+version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb330bbd4cb7a5b9f559427f06f98a4f853a137c8298f3bd3f8ca57663e21986"
+checksum = "ee93edf3c501f0035bbeffeccfed0b79e14c311f12195ec0e661e114a0f60da4"
 dependencies = [
  "portable-atomic",
- "rand 0.9.3",
+ "rand 0.10.1",
  "web-time",
 ]
 
@@ -2583,15 +2732,6 @@ version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d9c4f5dac5e15c24eb999c26181a6ca40b39fe946cbe4c263c7209467bc83af2"
 
-[[package]]
-name = "foreign-types"
-version = "0.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f6f339eb8adc052cd2ca78910fda869aefa38d22d5cb648e6485e4d3fc06f3b1"
-dependencies = [
- "foreign-types-shared 0.1.1",
-]
-
 [[package]]
 name = "foreign-types"
 version = "0.5.0"
@@ -2599,7 +2739,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d737d9aa519fb7b749cbc3b962edcf310a8dd1f4b67c91c4f83975dbdd17d965"
 dependencies = [
  "foreign-types-macros",
- "foreign-types-shared 0.3.1",
+ "foreign-types-shared",
 ]
 
 [[package]]
@@ -2613,12 +2753,6 @@ dependencies = [
  "syn 2.0.117",
 ]
 
-[[package]]
-name = "foreign-types-shared"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "00b0228411908ca8685dba7fc2cdd70ec9990a6e753e89b6ac91a84c40fbaf4b"
-
 [[package]]
 name = "foreign-types-shared"
 version = "0.3.1"
@@ -2655,6 +2789,16 @@ dependencies = [
  "futures-util",
 ]
 
+[[package]]
+name = "futures-bounded"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91f328e7fb845fc832912fb6a34f40cf6d1888c92f974d1893a54e97b5ff542e"
+dependencies = [
+ "futures-timer",
+ "futures-util",
+]
+
 [[package]]
 name = "futures-channel"
 version = "0.3.32"
@@ -2688,6 +2832,16 @@ version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cecba35d7ad927e23624b22ad55235f2239cfa44fd10428eecbeba6d6a717718"
 
+[[package]]
+name = "futures-lite"
+version = "2.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f78e10609fe0e0b3f4157ffab1876319b5b0db102a2c60dc4626306dc46b44ad"
+dependencies = [
+ "futures-core",
+ "pin-project-lite",
+]
+
 [[package]]
 name = "futures-macro"
 version = "0.3.32"
@@ -2699,6 +2853,17 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "futures-rustls"
+version = "0.26.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8f2f12607f92c69b12ed746fabf9ca4f5c482cba46679c1a75b874ed7c26adb"
+dependencies = [
+ "futures-io",
+ "rustls",
+ "rustls-pki-types",
+]
+
 [[package]]
 name = "futures-sink"
 version = "0.3.32"
@@ -2717,7 +2882,7 @@ version = "3.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f288b0a4f20f9a56b5d1da57e2227c661b7b16168e2f72365f57b63326e29b24"
 dependencies = [
- "gloo-timers",
+ "gloo-timers 0.2.6",
  "send_wrapper 0.4.0",
 ]
 
@@ -2821,6 +2986,7 @@ dependencies = [
  "js-sys",
  "libc",
  "r-efi 6.0.0",
+ "rand_core 0.10.1",
  "wasip2",
  "wasip3",
  "wasm-bindgen",
@@ -2863,7 +3029,7 @@ dependencies = [
  "futures-core",
  "futures-sink",
  "gloo-utils",
- "http",
+ "http 1.4.0",
  "js-sys",
  "pin-project",
  "serde",
@@ -2886,6 +3052,18 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "gloo-timers"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbb143cf96099802033e0d4f4963b19fd2e0b728bcf076cd9cf7f6634f092994"
+dependencies = [
+ "futures-channel",
+ "futures-core",
+ "js-sys",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "gloo-utils"
 version = "0.2.0"
@@ -2927,7 +3105,7 @@ dependencies = [
  "fnv",
  "futures-core",
  "futures-sink",
- "http",
+ "http 1.4.0",
  "indexmap 2.13.0",
  "slab",
  "tokio",
@@ -2975,6 +3153,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9229cfe53dfd69f0609a49f65461bd93001ea1ef889cd5529dd176593f5338a1"
 dependencies = [
  "allocator-api2",
+ "equivalent",
  "foldhash",
 ]
 
@@ -2984,6 +3163,15 @@ version = "0.16.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100"
 
+[[package]]
+name = "hashlink"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ba4ff7128dee98c7dc9794b6a411377e1404dba1c97deb8d1a55297bd25d8af"
+dependencies = [
+ "hashbrown 0.14.5",
+]
+
 [[package]]
 name = "hashlink"
 version = "0.10.0"
@@ -3013,6 +3201,12 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
 
+[[package]]
+name = "hermit-abi"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc0fef456e4baa96da950455cd02c081ca953b141298e41db3fc7e36b1da849c"
+
 [[package]]
 name = "hex"
 version = "0.4.3"
@@ -3040,6 +3234,59 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e712f64ec3850b98572bffac52e2c6f282b29fe6c5fa6d42334b30be438d95c1"
 
+[[package]]
+name = "hex_fmt"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b07f60793ff0a4d9cef0f18e63b5357e06209987153a64648c972c1e5aff336f"
+
+[[package]]
+name = "hickory-proto"
+version = "0.25.0-alpha.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d00147af6310f4392a31680db52a3ed45a2e0f68eb18e8c3fe5537ecc96d9e2"
+dependencies = [
+ "async-recursion",
+ "async-trait",
+ "cfg-if",
+ "data-encoding",
+ "enum-as-inner",
+ "futures-channel",
+ "futures-io",
+ "futures-util",
+ "idna",
+ "ipnet",
+ "once_cell",
+ "rand 0.9.3",
+ "socket2 0.5.10",
+ "thiserror 2.0.18",
+ "tinyvec",
+ "tokio",
+ "tracing",
+ "url",
+]
+
+[[package]]
+name = "hickory-resolver"
+version = "0.25.0-alpha.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5762f69ebdbd4ddb2e975cd24690bf21fe6b2604039189c26acddbc427f12887"
+dependencies = [
+ "cfg-if",
+ "futures-util",
+ "hickory-proto",
+ "ipconfig",
+ "moka",
+ "once_cell",
+ "parking_lot",
+ "rand 0.9.3",
+ "resolv-conf",
+ "smallvec",
+ "thiserror 2.0.18",
+ "tokio",
+ "tracing",
+]
+
 [[package]]
 name = "hkdf"
 version = "0.12.4"
@@ -3093,6 +3340,17 @@ dependencies = [
  "utf8-width",
 ]
 
+[[package]]
+name = "http"
+version = "0.2.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "601cbb57e577e2f5ef5be8e7b83f0f63994f25aa94d673e54a92d5c516d101f1"
+dependencies = [
+ "bytes",
+ "fnv",
+ "itoa",
+]
+
 [[package]]
 name = "http"
 version = "1.4.0"
@@ -3110,7 +3368,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1efedce1fb8e6913f23e0c92de8e62cd5b772a67e7b3946df930a62566c93184"
 dependencies = [
  "bytes",
- "http",
+ "http 1.4.0",
 ]
 
 [[package]]
@@ -3121,7 +3379,7 @@ checksum = "b021d93e26becf5dc7e1b75b1bed1fd93124b374ceb73f43d4d4eafec896a64a"
 dependencies = [
  "bytes",
  "futures-core",
- "http",
+ "http 1.4.0",
  "http-body",
  "pin-project-lite",
 ]
@@ -3196,7 +3454,7 @@ dependencies = [
  "futures-channel",
  "futures-core",
  "h2",
- "http",
+ "http 1.4.0",
  "http-body",
  "httparse",
  "httpdate",
@@ -3229,7 +3487,7 @@ version = "0.27.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e3c93eb611681b207e1fe55d5a71ecf91572ec8a6705cdb6857f7d8d5242cf58"
 dependencies = [
- "http",
+ "http 1.4.0",
  "hyper",
  "hyper-util",
  "log",
@@ -3254,22 +3512,6 @@ dependencies = [
  "tower-service",
 ]
 
-[[package]]
-name = "hyper-tls"
-version = "0.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "70206fc6890eaca9fde8a0bf71caa2ddfc9fe045ac9e5c70df101a7dbde866e0"
-dependencies = [
- "bytes",
- "http-body-util",
- "hyper",
- "hyper-util",
- "native-tls",
- "tokio",
- "tokio-native-tls",
- "tower-service",
-]
-
 [[package]]
 name = "hyper-util"
 version = "0.1.20"
@@ -3280,19 +3522,17 @@ dependencies = [
  "bytes",
  "futures-channel",
  "futures-util",
- "http",
+ "http 1.4.0",
  "http-body",
  "hyper",
  "ipnet",
  "libc",
  "percent-encoding",
  "pin-project-lite",
- "socket2",
- "system-configuration",
+ "socket2 0.6.3",
  "tokio",
  "tower-service",
  "tracing",
- "windows-registry",
 ]
 
 [[package]]
@@ -3448,6 +3688,81 @@ dependencies = [
  "icu_properties",
 ]
 
+[[package]]
+name = "if-addrs"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c0a05c691e1fae256cf7013d99dad472dc52d5543322761f83ec8d47eab40d2b"
+dependencies = [
+ "libc",
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "if-watch"
+version = "3.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "71c02a5161c313f0cbdbadc511611893584a10a7b6153cb554bdf83ddce99ec2"
+dependencies = [
+ "async-io",
+ "core-foundation 0.9.4",
+ "fnv",
+ "futures",
+ "if-addrs",
+ "ipnet",
+ "log",
+ "netlink-packet-core 0.8.1",
+ "netlink-packet-route 0.28.0",
+ "netlink-proto",
+ "netlink-sys",
+ "rtnetlink",
+ "system-configuration 0.7.0",
+ "tokio",
+ "windows",
+]
+
+[[package]]
+name = "igd-next"
+version = "0.15.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76b0d7d4541def58a37bf8efc559683f21edce7c82f0d866c93ac21f7e098f93"
+dependencies = [
+ "async-trait",
+ "attohttpc 0.24.1",
+ "bytes",
+ "futures",
+ "http 1.4.0",
+ "http-body-util",
+ "hyper",
+ "hyper-util",
+ "log",
+ "rand 0.8.5",
+ "tokio",
+ "url",
+ "xmltree",
+]
+
+[[package]]
+name = "igd-next"
+version = "0.16.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "516893339c97f6011282d5825ac94fc1c7aad5cad26bdc2d0cee068c0bf97f97"
+dependencies = [
+ "async-trait",
+ "attohttpc 0.30.1",
+ "bytes",
+ "futures",
+ "http 1.4.0",
+ "http-body-util",
+ "hyper",
+ "hyper-util",
+ "log",
+ "rand 0.9.3",
+ "tokio",
+ "url",
+ "xmltree",
+]
+
 [[package]]
 name = "include_bytes_aligned"
 version = "0.1.4"
@@ -3460,13 +3775,13 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "async-stream",
- "bedrock_client",
  "borsh",
  "common",
  "futures",
  "humantime-serde",
  "log",
  "logos-blockchain-core",
+ "logos-blockchain-zone-sdk",
  "nssa",
  "nssa_core",
  "serde",
@@ -3482,10 +3797,16 @@ dependencies = [
 name = "indexer_ffi"
 version = "0.1.0"
 dependencies = [
+ "anyhow",
  "cbindgen",
  "indexer_service",
+ "indexer_service_protocol",
+ "indexer_service_rpc",
+ "jsonrpsee",
  "log",
+ "nssa",
  "tokio",
+ "url",
 ]
 
 [[package]]
@@ -3610,7 +3931,9 @@ dependencies = [
  "hex",
  "indexer_ffi",
  "indexer_service",
+ "indexer_service_protocol",
  "indexer_service_rpc",
+ "jsonrpsee",
  "key_protocol",
  "log",
  "nssa",
@@ -3644,6 +3967,19 @@ dependencies = [
  "rustversion",
 ]
 
+[[package]]
+name = "ipconfig"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4d40460c0ce33d6ce4b0630ad68ff63d6661961c48b6dba35e5a4d81cfb48222"
+dependencies = [
+ "socket2 0.6.3",
+ "widestring",
+ "windows-registry",
+ "windows-result",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "ipnet"
 version = "2.12.0"
@@ -3827,7 +4163,7 @@ dependencies = [
  "futures-channel",
  "futures-util",
  "gloo-net",
- "http",
+ "http 1.4.0",
  "jsonrpsee-core",
  "pin-project",
  "rustls",
@@ -3852,7 +4188,7 @@ dependencies = [
  "bytes",
  "futures-timer",
  "futures-util",
- "http",
+ "http 1.4.0",
  "http-body",
  "http-body-util",
  "jsonrpsee-types",
@@ -3913,7 +4249,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4c51b7c290bb68ce3af2d029648148403863b982f138484a73f02a9dd52dbd7f"
 dependencies = [
  "futures-util",
- "http",
+ "http 1.4.0",
  "http-body",
  "http-body-util",
  "hyper",
@@ -3939,7 +4275,7 @@ version = "0.26.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bc88ff4688e43cc3fa9883a8a95c6fa27aa2e76c96e610b737b6554d650d7fd5"
 dependencies = [
- "http",
+ "http 1.4.0",
  "serde",
  "serde_json",
  "thiserror 2.0.18",
@@ -3963,7 +4299,7 @@ version = "0.26.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b6fceceeb05301cc4c065ab3bd2fa990d41ff4eb44e4ca1b30fa99c057c3e79"
 dependencies = [
- "http",
+ "http 1.4.0",
  "jsonrpsee-client-transport",
  "jsonrpsee-core",
  "jsonrpsee-types",
@@ -4002,6 +4338,7 @@ dependencies = [
  "aes-gcm",
  "anyhow",
  "base58",
+ "bincode",
  "bip39",
  "common",
  "hex",
@@ -4327,18 +4664,401 @@ version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6d2cec3eae94f9f509c767b45932f1ada8350c4bdb85af2fcab4a3c14807981"
 
+[[package]]
+name = "libp2p"
+version = "0.55.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b72dc443ddd0254cb49a794ed6b6728400ee446a0f7ab4a07d0209ee98de20e9"
+dependencies = [
+ "bytes",
+ "either",
+ "futures",
+ "futures-timer",
+ "getrandom 0.2.17",
+ "libp2p-allow-block-list",
+ "libp2p-autonat",
+ "libp2p-connection-limits",
+ "libp2p-core",
+ "libp2p-dns",
+ "libp2p-gossipsub",
+ "libp2p-identify",
+ "libp2p-identity",
+ "libp2p-kad",
+ "libp2p-mdns",
+ "libp2p-metrics",
+ "libp2p-quic",
+ "libp2p-swarm",
+ "libp2p-tcp",
+ "libp2p-upnp",
+ "multiaddr",
+ "pin-project",
+ "rw-stream-sink",
+ "thiserror 2.0.18",
+]
+
+[[package]]
+name = "libp2p-allow-block-list"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "38944b7cb981cc93f2f0fb411ff82d0e983bd226fbcc8d559639a3a73236568b"
+dependencies = [
+ "libp2p-core",
+ "libp2p-identity",
+ "libp2p-swarm",
+]
+
+[[package]]
+name = "libp2p-autonat"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e297bfc6cabb70c6180707f8fa05661b77ecb9cb67e8e8e1c469301358fa21d0"
+dependencies = [
+ "async-trait",
+ "asynchronous-codec",
+ "either",
+ "futures",
+ "futures-bounded",
+ "futures-timer",
+ "libp2p-core",
+ "libp2p-identity",
+ "libp2p-request-response",
+ "libp2p-swarm",
+ "quick-protobuf",
+ "quick-protobuf-codec",
+ "rand 0.8.5",
+ "rand_core 0.6.4",
+ "thiserror 2.0.18",
+ "tracing",
+ "web-time",
+]
+
+[[package]]
+name = "libp2p-connection-limits"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "efe9323175a17caa8a2ed4feaf8a548eeef5e0b72d03840a0eab4bcb0210ce1c"
+dependencies = [
+ "libp2p-core",
+ "libp2p-identity",
+ "libp2p-swarm",
+]
+
+[[package]]
+name = "libp2p-core"
+version = "0.43.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "249128cd37a2199aff30a7675dffa51caf073b51aa612d2f544b19932b9aebca"
+dependencies = [
+ "either",
+ "fnv",
+ "futures",
+ "futures-timer",
+ "libp2p-identity",
+ "multiaddr",
+ "multihash",
+ "multistream-select",
+ "parking_lot",
+ "pin-project",
+ "quick-protobuf",
+ "rand 0.8.5",
+ "rw-stream-sink",
+ "thiserror 2.0.18",
+ "tracing",
+ "unsigned-varint 0.8.0",
+ "web-time",
+]
+
+[[package]]
+name = "libp2p-dns"
+version = "0.43.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b780a1150214155b0ed1cdf09fbd2e1b0442604f9146a431d1b21d23eef7bd7"
+dependencies = [
+ "async-trait",
+ "futures",
+ "hickory-resolver",
+ "libp2p-core",
+ "libp2p-identity",
+ "parking_lot",
+ "smallvec",
+ "tracing",
+]
+
+[[package]]
+name = "libp2p-gossipsub"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d558548fa3b5a8e9b66392f785921e363c57c05dcadfda4db0d41ae82d313e4a"
+dependencies = [
+ "async-channel",
+ "asynchronous-codec",
+ "base64 0.22.1",
+ "byteorder",
+ "bytes",
+ "either",
+ "fnv",
+ "futures",
+ "futures-timer",
+ "getrandom 0.2.17",
+ "hashlink 0.9.1",
+ "hex_fmt",
+ "libp2p-core",
+ "libp2p-identity",
+ "libp2p-swarm",
+ "prometheus-client",
+ "quick-protobuf",
+ "quick-protobuf-codec",
+ "rand 0.8.5",
+ "regex",
+ "serde",
+ "sha2",
+ "tracing",
+ "web-time",
+]
+
+[[package]]
+name = "libp2p-identify"
+version = "0.46.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e8c06862544f02d05d62780ff590cc25a75f5c2b9df38ec7a370dcae8bb873cf"
+dependencies = [
+ "asynchronous-codec",
+ "either",
+ "futures",
+ "futures-bounded",
+ "futures-timer",
+ "libp2p-core",
+ "libp2p-identity",
+ "libp2p-swarm",
+ "quick-protobuf",
+ "quick-protobuf-codec",
+ "smallvec",
+ "thiserror 2.0.18",
+ "tracing",
+]
+
 [[package]]
 name = "libp2p-identity"
 version = "0.2.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f0c7892c221730ba55f7196e98b0b8ba5e04b4155651736036628e9f73ed6fc3"
 dependencies = [
+ "asn1_der",
  "bs58",
+ "ed25519-dalek",
  "hkdf",
+ "k256",
  "multihash",
+ "quick-protobuf",
+ "rand 0.8.5",
+ "serde",
  "sha2",
  "thiserror 2.0.18",
  "tracing",
+ "zeroize",
+]
+
+[[package]]
+name = "libp2p-kad"
+version = "0.47.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2bab0466a27ebe955bcbc27328fae5429c5b48c915fd6174931414149802ec23"
+dependencies = [
+ "asynchronous-codec",
+ "bytes",
+ "either",
+ "fnv",
+ "futures",
+ "futures-bounded",
+ "futures-timer",
+ "libp2p-core",
+ "libp2p-identity",
+ "libp2p-swarm",
+ "quick-protobuf",
+ "quick-protobuf-codec",
+ "rand 0.8.5",
+ "serde",
+ "sha2",
+ "smallvec",
+ "thiserror 2.0.18",
+ "tracing",
+ "uint",
+ "web-time",
+]
+
+[[package]]
+name = "libp2p-mdns"
+version = "0.47.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "11d0ba095e1175d797540e16b62e7576846b883cb5046d4159086837b36846cc"
+dependencies = [
+ "futures",
+ "hickory-proto",
+ "if-watch",
+ "libp2p-core",
+ "libp2p-identity",
+ "libp2p-swarm",
+ "rand 0.8.5",
+ "smallvec",
+ "socket2 0.5.10",
+ "tokio",
+ "tracing",
+]
+
+[[package]]
+name = "libp2p-metrics"
+version = "0.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2ce58c64292e87af624fcb86465e7dd8342e46a388d71e8fec0ab37ee789630a"
+dependencies = [
+ "futures",
+ "libp2p-core",
+ "libp2p-gossipsub",
+ "libp2p-identify",
+ "libp2p-identity",
+ "libp2p-kad",
+ "libp2p-swarm",
+ "pin-project",
+ "prometheus-client",
+ "web-time",
+]
+
+[[package]]
+name = "libp2p-quic"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41432a159b00424a0abaa2c80d786cddff81055ac24aa127e0cf375f7858d880"
+dependencies = [
+ "futures",
+ "futures-timer",
+ "if-watch",
+ "libp2p-core",
+ "libp2p-identity",
+ "libp2p-tls",
+ "quinn",
+ "rand 0.8.5",
+ "ring",
+ "rustls",
+ "socket2 0.5.10",
+ "thiserror 2.0.18",
+ "tokio",
+ "tracing",
+]
+
+[[package]]
+name = "libp2p-request-response"
+version = "0.28.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "548fe44a80ff275d400f1b26b090d441d83ef73efabbeb6415f4ce37e5aed865"
+dependencies = [
+ "async-trait",
+ "futures",
+ "futures-bounded",
+ "libp2p-core",
+ "libp2p-identity",
+ "libp2p-swarm",
+ "rand 0.8.5",
+ "smallvec",
+ "tracing",
+]
+
+[[package]]
+name = "libp2p-stream"
+version = "0.3.0-alpha"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "826716f1ee125895f1fb44911413cba023485b552ff96c7a2159bd037ac619bb"
+dependencies = [
+ "futures",
+ "libp2p-core",
+ "libp2p-identity",
+ "libp2p-swarm",
+ "rand 0.8.5",
+ "tracing",
+]
+
+[[package]]
+name = "libp2p-swarm"
+version = "0.46.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "803399b4b6f68adb85e63ab573ac568154b193e9a640f03e0f2890eabbcb37f8"
+dependencies = [
+ "either",
+ "fnv",
+ "futures",
+ "futures-timer",
+ "libp2p-core",
+ "libp2p-identity",
+ "libp2p-swarm-derive",
+ "lru",
+ "multistream-select",
+ "once_cell",
+ "rand 0.8.5",
+ "smallvec",
+ "tokio",
+ "tracing",
+ "web-time",
+]
+
+[[package]]
+name = "libp2p-swarm-derive"
+version = "0.35.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "206e0aa0ebe004d778d79fb0966aa0de996c19894e2c0605ba2f8524dd4443d8"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
+[[package]]
+name = "libp2p-tcp"
+version = "0.43.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "65346fb4d36035b23fec4e7be4c320436ba53537ce9b6be1d1db1f70c905cad0"
+dependencies = [
+ "futures",
+ "futures-timer",
+ "if-watch",
+ "libc",
+ "libp2p-core",
+ "socket2 0.5.10",
+ "tokio",
+ "tracing",
+]
+
+[[package]]
+name = "libp2p-tls"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96ff65a82e35375cbc31ebb99cacbbf28cb6c4fefe26bf13756ddcf708d40080"
+dependencies = [
+ "futures",
+ "futures-rustls",
+ "libp2p-core",
+ "libp2p-identity",
+ "rcgen",
+ "ring",
+ "rustls",
+ "rustls-webpki",
+ "thiserror 2.0.18",
+ "x509-parser",
+ "yasna",
+]
+
+[[package]]
+name = "libp2p-upnp"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d457b9ecceb66e7199f049926fad447f1f17f040e8d29d690c086b4cab8ed14a"
+dependencies = [
+ "futures",
+ "futures-timer",
+ "igd-next 0.15.1",
+ "libp2p-core",
+ "libp2p-swarm",
+ "tokio",
+ "tracing",
 ]
 
 [[package]]
@@ -4418,8 +5138,8 @@ checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897"
 
 [[package]]
 name = "logos-blockchain-blend-crypto"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "blake2",
  "logos-blockchain-groth16",
@@ -4432,8 +5152,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-blend-message"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "blake2",
  "derivative",
@@ -4455,8 +5175,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-blend-proofs"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "ed25519-dalek",
  "generic-array 1.3.5",
@@ -4474,8 +5194,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-chain-broadcast-service"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "async-trait",
  "derivative",
@@ -4490,11 +5210,12 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-chain-service"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "async-trait",
  "bytes",
+ "derivative",
  "futures",
  "logos-blockchain-chain-broadcast-service",
  "logos-blockchain-core",
@@ -4508,7 +5229,6 @@ dependencies = [
  "logos-blockchain-time-service",
  "logos-blockchain-tracing",
  "logos-blockchain-utils",
- "num-bigint 0.4.6",
  "overwatch",
  "serde",
  "serde_with",
@@ -4521,8 +5241,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-circuits-prover"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "logos-blockchain-circuits-utils",
  "tempfile",
@@ -4530,16 +5250,16 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-circuits-utils"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "dirs",
 ]
 
 [[package]]
 name = "logos-blockchain-common-http-client"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "futures",
  "hex",
@@ -4558,8 +5278,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-core"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "ark-ff 0.4.2",
  "bincode",
@@ -4572,6 +5292,7 @@ dependencies = [
  "logos-blockchain-cryptarchia-engine",
  "logos-blockchain-groth16",
  "logos-blockchain-key-management-system-keys",
+ "logos-blockchain-mmr",
  "logos-blockchain-poc",
  "logos-blockchain-pol",
  "logos-blockchain-poseidon2",
@@ -4580,6 +5301,7 @@ dependencies = [
  "multiaddr",
  "nom 8.0.0",
  "num-bigint 0.4.6",
+ "rpds",
  "serde",
  "strum",
  "thiserror 1.0.69",
@@ -4588,10 +5310,9 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-cryptarchia-engine"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
- "cfg_eval",
  "logos-blockchain-pol",
  "logos-blockchain-utils",
  "serde",
@@ -4604,11 +5325,13 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-cryptarchia-sync"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "bytes",
  "futures",
+ "libp2p",
+ "libp2p-stream",
  "logos-blockchain-core",
  "logos-blockchain-cryptarchia-engine",
  "rand 0.8.5",
@@ -4621,8 +5344,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-groth16"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "ark-bn254 0.4.0",
  "ark-ec 0.4.2",
@@ -4639,8 +5362,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-http-api-common"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "axum 0.7.9",
  "logos-blockchain-core",
@@ -4654,8 +5377,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-key-management-system-keys"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "async-trait",
  "bytes",
@@ -4680,8 +5403,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-key-management-system-macros"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -4690,8 +5413,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-key-management-system-operators"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "async-trait",
  "logos-blockchain-blend-proofs",
@@ -4706,8 +5429,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-key-management-system-service"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "async-trait",
  "log",
@@ -4723,8 +5446,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-ledger"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "derivative",
  "logos-blockchain-blend-crypto",
@@ -4734,6 +5457,7 @@ dependencies = [
  "logos-blockchain-cryptarchia-engine",
  "logos-blockchain-groth16",
  "logos-blockchain-key-management-system-keys",
+ "logos-blockchain-mmr",
  "logos-blockchain-pol",
  "logos-blockchain-utils",
  "logos-blockchain-utxotree",
@@ -4746,17 +5470,61 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "logos-blockchain-libp2p"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
+dependencies = [
+ "async-trait",
+ "backon",
+ "blake2",
+ "either",
+ "futures",
+ "hex",
+ "igd-next 0.16.2",
+ "libp2p",
+ "logos-blockchain-cryptarchia-sync",
+ "logos-blockchain-utils",
+ "multiaddr",
+ "natpmp",
+ "netdev",
+ "num_enum",
+ "rand 0.8.5",
+ "serde",
+ "serde_with",
+ "thiserror 1.0.69",
+ "tokio",
+ "tracing",
+ "zerocopy",
+]
+
+[[package]]
+name = "logos-blockchain-mmr"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
+dependencies = [
+ "ark-ff 0.4.2",
+ "logos-blockchain-groth16",
+ "logos-blockchain-poseidon2",
+ "rpds",
+ "serde",
+ "thiserror 2.0.18",
+]
+
 [[package]]
 name = "logos-blockchain-network-service"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "async-trait",
  "futures",
  "logos-blockchain-core",
  "logos-blockchain-cryptarchia-sync",
+ "logos-blockchain-libp2p",
  "logos-blockchain-tracing",
  "overwatch",
+ "rand 0.8.5",
+ "rand_chacha 0.3.1",
  "serde",
  "tokio",
  "tokio-stream",
@@ -4765,8 +5533,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-poc"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "logos-blockchain-circuits-prover",
  "logos-blockchain-circuits-utils",
@@ -4781,8 +5549,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-pol"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "astro-float",
  "logos-blockchain-circuits-prover",
@@ -4800,8 +5568,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-poq"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "logos-blockchain-circuits-prover",
  "logos-blockchain-circuits-utils",
@@ -4817,8 +5585,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-poseidon2"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "ark-bn254 0.4.0",
  "ark-ff 0.4.2",
@@ -4828,8 +5596,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-services-utils"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "async-trait",
  "futures",
@@ -4843,8 +5611,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-storage-service"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "async-trait",
  "bytes",
@@ -4861,15 +5629,18 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-time-service"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "async-trait",
  "futures",
  "log",
  "logos-blockchain-cryptarchia-engine",
  "logos-blockchain-tracing",
+ "logos-blockchain-utils",
  "overwatch",
+ "serde",
+ "serde_with",
  "sntpc",
  "thiserror 2.0.18",
  "time",
@@ -4880,8 +5651,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-tracing"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "opentelemetry",
  "opentelemetry-appender-tracing",
@@ -4892,6 +5663,7 @@ dependencies = [
  "rand 0.8.5",
  "serde",
  "tokio",
+ "tonic",
  "tracing",
  "tracing-appender",
  "tracing-gelf",
@@ -4903,8 +5675,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-utils"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "async-trait",
  "blake2",
@@ -4920,8 +5692,8 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-utxotree"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "ark-ff 0.4.2",
  "logos-blockchain-groth16",
@@ -4934,16 +5706,16 @@ dependencies = [
 
 [[package]]
 name = "logos-blockchain-witness-generator"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "tempfile",
 ]
 
 [[package]]
 name = "logos-blockchain-zksign"
-version = "0.2.1"
-source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=1da154c74b911318fb853d37261f8a05ffe513b4#1da154c74b911318fb853d37261f8a05ffe513b4"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
 dependencies = [
  "logos-blockchain-circuits-prover",
  "logos-blockchain-circuits-utils",
@@ -4957,6 +5729,26 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "logos-blockchain-zone-sdk"
+version = "0.1.2"
+source = "git+https://github.com/logos-blockchain/logos-blockchain.git?rev=ee281a447d95a951752461ee0a6e88eb4a0f17cf#ee281a447d95a951752461ee0a6e88eb4a0f17cf"
+dependencies = [
+ "async-trait",
+ "futures",
+ "logos-blockchain-common-http-client",
+ "logos-blockchain-core",
+ "logos-blockchain-groth16",
+ "logos-blockchain-key-management-system-service",
+ "rand 0.8.5",
+ "reqwest",
+ "rpds",
+ "serde",
+ "thiserror 2.0.18",
+ "tokio",
+ "tracing",
+]
+
 [[package]]
 name = "loki-api"
 version = "0.1.3"
@@ -4967,6 +5759,15 @@ dependencies = [
  "prost-types 0.13.5",
 ]
 
+[[package]]
+name = "lru"
+version = "0.12.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "234cf4f4a04dc1f57e24b96cc0cd600cf2af460d4161ac5ecdd0af8e1f3b2a38"
+dependencies = [
+ "hashbrown 0.15.5",
+]
+
 [[package]]
 name = "lru-slab"
 version = "0.1.2"
@@ -5180,7 +5981,7 @@ dependencies = [
  "bitflags 2.11.0",
  "block",
  "core-graphics-types",
- "foreign-types 0.5.0",
+ "foreign-types",
  "log",
  "objc",
  "paste",
@@ -5229,6 +6030,23 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "moka"
+version = "0.12.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "957228ad12042ee839f93c8f257b62b4c0ab5eaae1d4fa60de53b27c9d7c5046"
+dependencies = [
+ "crossbeam-channel",
+ "crossbeam-epoch",
+ "crossbeam-utils",
+ "equivalent",
+ "parking_lot",
+ "portable-atomic",
+ "smallvec",
+ "tagptr",
+ "uuid",
+]
+
 [[package]]
 name = "multer"
 version = "3.1.0"
@@ -5238,7 +6056,7 @@ dependencies = [
  "bytes",
  "encoding_rs",
  "futures-util",
- "http",
+ "http 1.4.0",
  "httparse",
  "memchr",
  "mime",
@@ -5261,7 +6079,8 @@ dependencies = [
  "percent-encoding",
  "serde",
  "static_assertions",
- "unsigned-varint",
+ "unsigned-varint 0.8.0",
+ "url",
 ]
 
 [[package]]
@@ -5283,24 +6102,34 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "89ace881e3f514092ce9efbcb8f413d0ad9763860b828981c2de51ddc666936c"
 dependencies = [
  "no_std_io2",
- "unsigned-varint",
+ "serde",
+ "unsigned-varint 0.8.0",
 ]
 
 [[package]]
-name = "native-tls"
-version = "0.2.18"
+name = "multistream-select"
+version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "465500e14ea162429d264d44189adc38b199b62b1c21eea9f69e4b73cb03bbf2"
+checksum = "ea0df8e5eec2298a62b326ee4f0d7fe1a6b90a09dfcf9df37b38f947a8c42f19"
 dependencies = [
- "libc",
+ "bytes",
+ "futures",
  "log",
- "openssl",
- "openssl-probe",
- "openssl-sys",
- "schannel",
- "security-framework",
- "security-framework-sys",
- "tempfile",
+ "pin-project",
+ "smallvec",
+ "unsigned-varint 0.7.2",
+]
+
+[[package]]
+name = "natpmp"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77366fa8ce34e2e1322dd97da65f11a62f451bd3daae8be6993c00800f61dd07"
+dependencies = [
+ "async-trait",
+ "cc",
+ "netdev",
+ "tokio",
 ]
 
 [[package]]
@@ -5319,6 +6148,108 @@ dependencies = [
  "rayon",
 ]
 
+[[package]]
+name = "netdev"
+version = "0.31.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f901362e84cd407be6f8cd9d3a46bccf09136b095792785401ea7d283c79b91d"
+dependencies = [
+ "dlopen2",
+ "ipnet",
+ "libc",
+ "netlink-packet-core 0.7.0",
+ "netlink-packet-route 0.17.1",
+ "netlink-sys",
+ "once_cell",
+ "system-configuration 0.6.1",
+ "windows-sys 0.52.0",
+]
+
+[[package]]
+name = "netlink-packet-core"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72724faf704479d67b388da142b186f916188505e7e0b26719019c525882eda4"
+dependencies = [
+ "anyhow",
+ "byteorder",
+ "netlink-packet-utils",
+]
+
+[[package]]
+name = "netlink-packet-core"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3463cbb78394cb0141e2c926b93fc2197e473394b761986eca3b9da2c63ae0f4"
+dependencies = [
+ "paste",
+]
+
+[[package]]
+name = "netlink-packet-route"
+version = "0.17.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "053998cea5a306971f88580d0829e90f270f940befd7cf928da179d4187a5a66"
+dependencies = [
+ "anyhow",
+ "bitflags 1.3.2",
+ "byteorder",
+ "libc",
+ "netlink-packet-core 0.7.0",
+ "netlink-packet-utils",
+]
+
+[[package]]
+name = "netlink-packet-route"
+version = "0.28.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ce3636fa715e988114552619582b530481fd5ef176a1e5c1bf024077c2c9445"
+dependencies = [
+ "bitflags 2.11.0",
+ "libc",
+ "log",
+ "netlink-packet-core 0.8.1",
+]
+
+[[package]]
+name = "netlink-packet-utils"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ede8a08c71ad5a95cdd0e4e52facd37190977039a4704eb82a283f713747d34"
+dependencies = [
+ "anyhow",
+ "byteorder",
+ "paste",
+ "thiserror 1.0.69",
+]
+
+[[package]]
+name = "netlink-proto"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b65d130ee111430e47eed7896ea43ca693c387f097dd97376bffafbf25812128"
+dependencies = [
+ "bytes",
+ "futures",
+ "log",
+ "netlink-packet-core 0.8.1",
+ "netlink-sys",
+ "thiserror 2.0.18",
+]
+
+[[package]]
+name = "netlink-sys"
+version = "0.8.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cd6c30ed10fa69cc491d491b85cc971f6bdeb8e7367b7cde2ee6cc878d583fae"
+dependencies = [
+ "bytes",
+ "futures-util",
+ "libc",
+ "log",
+ "tokio",
+]
+
 [[package]]
 name = "next_tuple"
 version = "0.1.0"
@@ -5343,6 +6274,18 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "nix"
+version = "0.30.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "74523f3a35e05aba87a1d978330aef40f67b0304ac79c1c00b294c9830543db6"
+dependencies = [
+ "bitflags 2.11.0",
+ "cfg-if",
+ "cfg_aliases",
+ "libc",
+]
+
 [[package]]
 name = "no_std_io2"
 version = "0.8.1"
@@ -5607,6 +6550,15 @@ dependencies = [
  "thiserror 2.0.18",
 ]
 
+[[package]]
+name = "oid-registry"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12f40cff3dde1b6087cc5d5f5d4d65712f34016a03ed60e9c08dcc392736b5b7"
+dependencies = [
+ "asn1-rs",
+]
+
 [[package]]
 name = "once_cell"
 version = "1.21.3"
@@ -5625,50 +6577,12 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c08d65885ee38876c4f86fa503fb49d7b507c2b62552df7c70b2fce627e06381"
 
-[[package]]
-name = "openssl"
-version = "0.10.75"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "08838db121398ad17ab8531ce9de97b244589089e290a384c900cb9ff7434328"
-dependencies = [
- "bitflags 2.11.0",
- "cfg-if",
- "foreign-types 0.3.2",
- "libc",
- "once_cell",
- "openssl-macros",
- "openssl-sys",
-]
-
-[[package]]
-name = "openssl-macros"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a948666b637a0f465e8564c73e89d4dde00d72d4d473cc972f390fc3dcee7d9c"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.117",
-]
-
 [[package]]
 name = "openssl-probe"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7c87def4c32ab89d880effc9e097653c8da5d6ef28e6b539d313baaacfbafcbe"
 
-[[package]]
-name = "openssl-sys"
-version = "0.9.111"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "82cab2d520aa75e3c58898289429321eb788c3106963d0dc886ec7a5f4adc321"
-dependencies = [
- "cc",
- "libc",
- "pkg-config",
- "vcpkg",
-]
-
 [[package]]
 name = "opentelemetry"
 version = "0.31.0"
@@ -5702,7 +6616,7 @@ checksum = "d7a6d09a73194e6b66df7c8f1b680f156d916a1a942abf2de06823dd02b7855d"
 dependencies = [
  "async-trait",
  "bytes",
- "http",
+ "http 1.4.0",
  "opentelemetry",
  "reqwest",
 ]
@@ -5713,7 +6627,7 @@ version = "0.31.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1f69cd6acbb9af919df949cd1ec9e5e7fdc2ef15d234b6b795aaa525cc02f71f"
 dependencies = [
- "http",
+ "http 1.4.0",
  "opentelemetry",
  "opentelemetry-http",
  "opentelemetry-proto",
@@ -5877,6 +6791,16 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "df94ce210e5bc13cb6651479fa48d14f601d9858cfe0467f43ae157023b938d3"
 
+[[package]]
+name = "pem"
+version = "3.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d30c53c26bc5b31a98cd02d20f25a7c8567146caf63ed593a9d87b2775291be"
+dependencies = [
+ "base64 0.22.1",
+ "serde_core",
+]
+
 [[package]]
 name = "pem-rfc7468"
 version = "0.7.0"
@@ -5957,6 +6881,20 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b4596b6d070b27117e987119b4dac604f3c58cfb0b191112e24771b2faeac1a6"
 
+[[package]]
+name = "polling"
+version = "3.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d0e4f59085d47d8241c88ead0f274e8a0cb551f3625263c05eb8dd897c34218"
+dependencies = [
+ "cfg-if",
+ "concurrent-queue",
+ "hermit-abi",
+ "pin-project-lite",
+ "rustix",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "polyval"
 version = "0.6.2"
@@ -6131,6 +7069,29 @@ dependencies = [
  "token_program",
 ]
 
+[[package]]
+name = "prometheus-client"
+version = "0.22.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "504ee9ff529add891127c4827eb481bd69dc0ebc72e9a682e187db4caa60c3ca"
+dependencies = [
+ "dtoa",
+ "itoa",
+ "parking_lot",
+ "prometheus-client-derive-encode",
+]
+
+[[package]]
+name = "prometheus-client-derive-encode"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "440f724eba9f6996b75d63681b0a92b06947f1457076d503a4d2e2c8f56442b8"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "proptest"
 version = "1.10.0"
@@ -6284,6 +7245,25 @@ dependencies = [
  "pyo3-build-config",
  "quote",
  "syn 2.0.117",
+name = "quick-protobuf"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9d6da84cc204722a989e01ba2f6e1e276e190f22263d0cb6ce8526fcdb0d2e1f"
+dependencies = [
+ "byteorder",
+]
+
+[[package]]
+name = "quick-protobuf-codec"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "15a0580ab32b169745d7a39db2ba969226ca16738931be152a3209b409de2474"
+dependencies = [
+ "asynchronous-codec",
+ "bytes",
+ "quick-protobuf",
+ "thiserror 1.0.69",
+ "unsigned-varint 0.8.0",
 ]
 
 [[package]]
@@ -6294,12 +7274,13 @@ checksum = "b9e20a958963c291dc322d98411f541009df2ced7b5a4f2bd52337638cfccf20"
 dependencies = [
  "bytes",
  "cfg_aliases",
+ "futures-io",
  "pin-project-lite",
  "quinn-proto",
  "quinn-udp",
  "rustc-hash",
  "rustls",
- "socket2",
+ "socket2 0.6.3",
  "thiserror 2.0.18",
  "tokio",
  "tracing",
@@ -6336,7 +7317,7 @@ dependencies = [
  "cfg_aliases",
  "libc",
  "once_cell",
- "socket2",
+ "socket2 0.6.3",
  "tracing",
  "windows-sys 0.59.0",
 ]
@@ -6411,6 +7392,17 @@ dependencies = [
  "rand_core 0.9.5",
 ]
 
+[[package]]
+name = "rand"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d2e8e8bcc7961af1fdac401278c6a831614941f6164ee3bf4ce61b7edb162207"
+dependencies = [
+ "chacha20",
+ "getrandom 0.4.2",
+ "rand_core 0.10.1",
+]
+
 [[package]]
 name = "rand_chacha"
 version = "0.3.1"
@@ -6449,6 +7441,12 @@ dependencies = [
  "getrandom 0.3.4",
 ]
 
+[[package]]
+name = "rand_core"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "63b8176103e19a2643978565ca18b50549f6101881c443590420e4dc998a3c69"
+
 [[package]]
 name = "rand_xorshift"
 version = "0.4.0"
@@ -6484,6 +7482,19 @@ dependencies = [
  "crossbeam-utils",
 ]
 
+[[package]]
+name = "rcgen"
+version = "0.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "75e669e5202259b5314d1ea5397316ad400819437857b90861765f24c4cf80a2"
+dependencies = [
+ "pem",
+ "ring",
+ "rustls-pki-types",
+ "time",
+ "yasna",
+]
+
 [[package]]
 name = "reactive_graph"
 version = "0.2.13"
@@ -6624,22 +7635,18 @@ checksum = "eddd3ca559203180a307f12d114c268abf583f59b03cb906fd0b3ff8646c1147"
 dependencies = [
  "base64 0.22.1",
  "bytes",
- "encoding_rs",
  "futures-channel",
  "futures-core",
  "futures-util",
  "h2",
- "http",
+ "http 1.4.0",
  "http-body",
  "http-body-util",
  "hyper",
  "hyper-rustls",
- "hyper-tls",
  "hyper-util",
  "js-sys",
  "log",
- "mime",
- "native-tls",
  "percent-encoding",
  "pin-project-lite",
  "quinn",
@@ -6650,7 +7657,6 @@ dependencies = [
  "serde_urlencoded",
  "sync_wrapper",
  "tokio",
- "tokio-native-tls",
  "tokio-rustls",
  "tokio-util",
  "tower",
@@ -6664,6 +7670,12 @@ dependencies = [
  "webpki-roots",
 ]
 
+[[package]]
+name = "resolv-conf"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e061d1b48cb8d38042de4ae0a7a6401009d6143dc80d2e2d6f31f0bdd6470c7"
+
 [[package]]
 name = "rfc6979"
 version = "0.4.0"
@@ -7141,6 +8153,21 @@ checksum = "50a0e551c1e27e1731aba276dbeaeac73f53c7cd34d1bda485d02bd1e0f36844"
 dependencies = [
  "libc",
  "windows-sys 0.59.0",
+name = "rtnetlink"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b960d5d873a75b5be9761b1e73b146f52dddcd27bac75263f40fba686d4d7b5"
+dependencies = [
+ "futures-channel",
+ "futures-util",
+ "log",
+ "netlink-packet-core 0.8.1",
+ "netlink-packet-route 0.28.0",
+ "netlink-proto",
+ "netlink-sys",
+ "nix",
+ "thiserror 1.0.69",
+ "tokio",
 ]
 
 [[package]]
@@ -7186,6 +8213,15 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "rusticata-macros"
+version = "4.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "faf0c4a6ece9950b9abdb62b1cfcf2a68b3b67a10ba445b3bb85be2a293d0632"
+dependencies = [
+ "nom 7.1.3",
+]
+
 [[package]]
 name = "rustix"
 version = "1.1.4"
@@ -7289,6 +8325,17 @@ dependencies = [
  "twox-hash",
 ]
 
+[[package]]
+name = "rw-stream-sink"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d8c9026ff5d2f23da5e45bbc283f156383001bfb09c4e44256d02c1a685fe9a1"
+dependencies = [
+ "futures",
+ "pin-project",
+ "static_assertions",
+]
+
 [[package]]
 name = "ryu"
 version = "1.0.23"
@@ -7452,17 +8499,16 @@ name = "sequencer_core"
 version = "0.1.0"
 dependencies = [
  "anyhow",
- "bedrock_client",
  "borsh",
  "bytesize",
  "chrono",
  "common",
  "futures",
  "humantime-serde",
- "jsonrpsee",
  "log",
  "logos-blockchain-core",
  "logos-blockchain-key-management-system-service",
+ "logos-blockchain-zone-sdk",
  "mempool",
  "nssa",
  "nssa_core",
@@ -7488,7 +8534,6 @@ dependencies = [
  "common",
  "env_logger",
  "futures",
- "indexer_service_rpc",
  "jsonrpsee",
  "log",
  "mempool",
@@ -7719,7 +8764,7 @@ dependencies = [
  "const_format",
  "futures",
  "gloo-net",
- "http",
+ "http 1.4.0",
  "http-body-util",
  "hyper",
  "inventory",
@@ -7871,6 +8916,16 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "socket2"
+version = "0.5.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e22376abed350d73dd1cd119b57ffccad95b4e585a7cda43e286245ce23c0678"
+dependencies = [
+ "libc",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "socket2"
 version = "0.6.3"
@@ -7890,7 +8945,7 @@ dependencies = [
  "base64 0.22.1",
  "bytes",
  "futures",
- "http",
+ "http 1.4.0",
  "httparse",
  "log",
  "rand 0.8.5",
@@ -8060,6 +9115,17 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "system-configuration"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c879d448e9d986b661742763247d3693ed13609438cf3d006f51f5368a5ba6b"
+dependencies = [
+ "bitflags 2.11.0",
+ "core-foundation 0.9.4",
+ "system-configuration-sys",
+]
+
 [[package]]
 name = "system-configuration"
 version = "0.7.0"
@@ -8113,6 +9179,12 @@ dependencies = [
  "web-sys",
 ]
 
+[[package]]
+name = "tagptr"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b2093cf4c8eb1e67749a6762251bc9cd836b6fc171623bd0a9d324d37af2417"
+
 [[package]]
 name = "tap"
 version = "1.0.1"
@@ -8190,9 +9262,9 @@ dependencies = [
 
 [[package]]
 name = "testcontainers"
-version = "0.27.2"
+version = "0.27.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0bd36b06a2a6c0c3c81a83be1ab05fe86460d054d4d51bf513bc56b3e15bdc22"
+checksum = "bfd5785b5483672915ed5fe3cddf9f546802779fc1eceff0a6fb7321fac81c1e"
 dependencies = [
  "astral-tokio-tar",
  "async-trait",
@@ -8204,7 +9276,7 @@ dependencies = [
  "etcetera",
  "ferroid",
  "futures",
- "http",
+ "http 1.4.0",
  "itertools 0.14.0",
  "log",
  "memchr",
@@ -8384,7 +9456,7 @@ dependencies = [
  "parking_lot",
  "pin-project-lite",
  "signal-hook-registry",
- "socket2",
+ "socket2 0.6.3",
  "tokio-macros",
  "windows-sys 0.61.2",
 ]
@@ -8400,27 +9472,6 @@ dependencies = [
  "syn 2.0.117",
 ]
 
-[[package]]
-name = "tokio-native-tls"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bbae76ab933c85776efabc971569dd6119c580d8f5d448769dec1764bf796ef2"
-dependencies = [
- "native-tls",
- "tokio",
-]
-
-[[package]]
-name = "tokio-retry"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f57eb36ecbe0fc510036adff84824dd3c24bb781e21bfa67b69d556aa85214f"
-dependencies = [
- "pin-project",
- "rand 0.8.5",
- "tokio",
-]
-
 [[package]]
 name = "tokio-rustls"
 version = "0.26.4"
@@ -8581,7 +9632,7 @@ dependencies = [
  "base64 0.22.1",
  "bytes",
  "h2",
- "http",
+ "http 1.4.0",
  "http-body",
  "http-body-util",
  "hyper",
@@ -8589,7 +9640,7 @@ dependencies = [
  "hyper-util",
  "percent-encoding",
  "pin-project",
- "socket2",
+ "socket2 0.6.3",
  "sync_wrapper",
  "tokio",
  "tokio-stream",
@@ -8639,7 +9690,7 @@ dependencies = [
  "bytes",
  "futures-core",
  "futures-util",
- "http",
+ "http 1.4.0",
  "http-body",
  "http-body-util",
  "http-range-header",
@@ -8847,7 +9898,7 @@ checksum = "8628dcc84e5a09eb3d8423d6cb682965dea9133204e8fb3efee74c2a0c259442"
 dependencies = [
  "bytes",
  "data-encoding",
- "http",
+ "http 1.4.0",
  "httparse",
  "log",
  "rand 0.9.3",
@@ -8928,6 +9979,18 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "uint"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "909988d098b2f738727b161a106cfc7cab00c539c2687a8836f8e565976fb53e"
+dependencies = [
+ "byteorder",
+ "crunchy",
+ "hex",
+ "static_assertions",
+]
+
 [[package]]
 name = "unarray"
 version = "0.1.4"
@@ -9001,6 +10064,12 @@ version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "673aac59facbab8a9007c7f6108d11f63b603f7cabff99fabf650fea5c32b861"
 
+[[package]]
+name = "unsigned-varint"
+version = "0.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6889a77d49f1f013504cec6bf97a2c730394adedaeb1deb5ea08949a50541105"
+
 [[package]]
 name = "unsigned-varint"
 version = "0.8.0"
@@ -9035,7 +10104,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d81f9efa9df032be5934a46a068815a10a042b494b6a58cb0a1a97bb5467ed6f"
 dependencies = [
  "base64 0.22.1",
- "http",
+ "http 1.4.0",
  "httparse",
  "log",
 ]
@@ -9406,6 +10475,12 @@ dependencies = [
  "safe_arch",
 ]
 
+[[package]]
+name = "widestring"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72069c3113ab32ab29e5584db3c6ec55d416895e60715417b5b883a357c3e471"
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -9437,6 +10512,27 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
+[[package]]
+name = "windows"
+version = "0.62.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "527fadee13e0c05939a6a05d5bd6eec6cd2e3dbd648b9f8e447c6518133d8580"
+dependencies = [
+ "windows-collections",
+ "windows-core",
+ "windows-future",
+ "windows-numerics",
+]
+
+[[package]]
+name = "windows-collections"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "23b2d95af1a8a14a3c7367e1ed4fc9c20e0a26e79551b1454d72583c97cc6610"
+dependencies = [
+ "windows-core",
+]
+
 [[package]]
 name = "windows-core"
 version = "0.62.2"
@@ -9450,6 +10546,17 @@ dependencies = [
  "windows-strings",
 ]
 
+[[package]]
+name = "windows-future"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e1d6f90251fe18a279739e78025bd6ddc52a7e22f921070ccdc67dde84c605cb"
+dependencies = [
+ "windows-core",
+ "windows-link",
+ "windows-threading",
+]
+
 [[package]]
 name = "windows-implement"
 version = "0.60.2"
@@ -9478,6 +10585,16 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5"
 
+[[package]]
+name = "windows-numerics"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e2e40844ac143cdb44aead537bbf727de9b044e107a0f1220392177d15b0f26"
+dependencies = [
+ "windows-core",
+ "windows-link",
+]
+
 [[package]]
 name = "windows-registry"
 version = "0.6.1"
@@ -9574,6 +10691,15 @@ dependencies = [
  "windows_x86_64_msvc 0.52.6",
 ]
 
+[[package]]
+name = "windows-threading"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3949bd5b99cafdf1c7ca86b43ca564028dfe27d66958f2470940f73d86d75b37"
+dependencies = [
+ "windows-link",
+]
+
 [[package]]
 name = "windows_aarch64_gnullvm"
 version = "0.42.2"
@@ -9788,6 +10914,23 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "x509-parser"
+version = "0.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4569f339c0c402346d4a75a9e39cf8dad310e287eef1ff56d4c68e5067f53460"
+dependencies = [
+ "asn1-rs",
+ "data-encoding",
+ "der-parser",
+ "lazy_static",
+ "nom 7.1.3",
+ "oid-registry",
+ "rusticata-macros",
+ "thiserror 2.0.18",
+ "time",
+]
+
 [[package]]
 name = "xattr"
 version = "1.6.1"
@@ -9798,6 +10941,21 @@ dependencies = [
  "rustix",
 ]
 
+[[package]]
+name = "xml-rs"
+version = "0.8.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3ae8337f8a065cfc972643663ea4279e04e7256de865aa66fe25cec5fb912d3f"
+
+[[package]]
+name = "xmltree"
+version = "0.10.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7d8a75eaf6557bb84a65ace8609883db44a29951042ada9b393151532e41fcb"
+dependencies = [
+ "xml-rs",
+]
+
 [[package]]
 name = "xxhash-rust"
 version = "0.8.15"
@@ -9812,7 +10970,7 @@ checksum = "2462ea039c445496d8793d052e13787f2b90e750b833afee748e601c17621ed9"
 dependencies = [
  "arraydeque",
  "encoding_rs",
- "hashlink",
+ "hashlink 0.10.0",
 ]
 
 [[package]]
@@ -9821,6 +10979,15 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cfe53a6657fd280eaa890a3bc59152892ffa3e30101319d168b781ed6529b049"
 
+[[package]]
+name = "yasna"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e17bb3549cc1321ae1296b9cdc2698e2b6cb1992adfa19a8c72e5b7a738f44cd"
+dependencies = [
+ "time",
+]
+
 [[package]]
 name = "yoke"
 version = "0.8.1"
diff --git a/Cargo.toml b/Cargo.toml
index 551c1f98..2cb3aad4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -36,7 +36,6 @@ members = [
   "examples/program_deployment",
   "examples/program_deployment/methods",
   "examples/program_deployment/methods/guest",
-  "bedrock_client",
   "testnet_initial_state",
   "keycard_wallet",
   "indexer_ffi",
@@ -60,6 +59,7 @@ indexer_service_rpc = { path = "indexer/service/rpc" }
 indexer_ffi = { path = "indexer_ffi" }
 wallet = { path = "wallet" }
 wallet-ffi = { path = "wallet-ffi", default-features = false }
+indexer_ffi = { path = "indexer/ffi" }
 clock_core = { path = "programs/clock/core" }
 token_core = { path = "programs/token/core" }
 token_program = { path = "programs/token" }
@@ -68,7 +68,6 @@ amm_program = { path = "programs/amm" }
 ata_core = { path = "programs/associated_token_account/core" }
 ata_program = { path = "programs/associated_token_account" }
 test_program_methods = { path = "test_program_methods" }
-bedrock_client = { path = "bedrock_client" }
 testnet_initial_state = { path = "testnet_initial_state" }
 keycard_wallet = { path = "keycard_wallet" }
 
@@ -125,11 +124,12 @@ schemars = "1.2"
 async-stream = "0.3.6"
 pyo3 = { version = "0.24", features = ["auto-initialize"] }
 
-logos-blockchain-common-http-client = { git = "https://github.com/logos-blockchain/logos-blockchain.git", rev = "1da154c74b911318fb853d37261f8a05ffe513b4" }
-logos-blockchain-key-management-system-service = { git = "https://github.com/logos-blockchain/logos-blockchain.git", rev = "1da154c74b911318fb853d37261f8a05ffe513b4" }
-logos-blockchain-core = { git = "https://github.com/logos-blockchain/logos-blockchain.git", rev = "1da154c74b911318fb853d37261f8a05ffe513b4" }
-logos-blockchain-chain-broadcast-service = { git = "https://github.com/logos-blockchain/logos-blockchain.git", rev = "1da154c74b911318fb853d37261f8a05ffe513b4" }
-logos-blockchain-chain-service = { git = "https://github.com/logos-blockchain/logos-blockchain.git", rev = "1da154c74b911318fb853d37261f8a05ffe513b4" }
+logos-blockchain-common-http-client = { git = "https://github.com/logos-blockchain/logos-blockchain.git", rev = "ee281a447d95a951752461ee0a6e88eb4a0f17cf" }
+logos-blockchain-key-management-system-service = { git = "https://github.com/logos-blockchain/logos-blockchain.git", rev = "ee281a447d95a951752461ee0a6e88eb4a0f17cf" }
+logos-blockchain-core = { git = "https://github.com/logos-blockchain/logos-blockchain.git", rev = "ee281a447d95a951752461ee0a6e88eb4a0f17cf" }
+logos-blockchain-chain-broadcast-service = { git = "https://github.com/logos-blockchain/logos-blockchain.git", rev = "ee281a447d95a951752461ee0a6e88eb4a0f17cf" }
+logos-blockchain-chain-service = { git = "https://github.com/logos-blockchain/logos-blockchain.git", rev = "ee281a447d95a951752461ee0a6e88eb4a0f17cf" }
+logos-blockchain-zone-sdk = { git = "https://github.com/logos-blockchain/logos-blockchain.git", rev = "ee281a447d95a951752461ee0a6e88eb4a0f17cf" }
 
 rocksdb = { version = "0.24.0", default-features = false, features = [
   "snappy",
diff --git a/artifacts/program_methods/amm.bin b/artifacts/program_methods/amm.bin
index 36caad85..542fc93f 100644
Binary files a/artifacts/program_methods/amm.bin and b/artifacts/program_methods/amm.bin differ
diff --git a/artifacts/program_methods/associated_token_account.bin b/artifacts/program_methods/associated_token_account.bin
index 5439d1af..d29bcf02 100644
Binary files a/artifacts/program_methods/associated_token_account.bin and b/artifacts/program_methods/associated_token_account.bin differ
diff --git a/artifacts/program_methods/authenticated_transfer.bin b/artifacts/program_methods/authenticated_transfer.bin
index bdbcef61..928963dc 100644
Binary files a/artifacts/program_methods/authenticated_transfer.bin and b/artifacts/program_methods/authenticated_transfer.bin differ
diff --git a/artifacts/program_methods/clock.bin b/artifacts/program_methods/clock.bin
index d3ca0dab..c2ce2594 100644
Binary files a/artifacts/program_methods/clock.bin and b/artifacts/program_methods/clock.bin differ
diff --git a/artifacts/program_methods/pinata.bin b/artifacts/program_methods/pinata.bin
index 5e6a011b..a097ad3d 100644
Binary files a/artifacts/program_methods/pinata.bin and b/artifacts/program_methods/pinata.bin differ
diff --git a/artifacts/program_methods/pinata_token.bin b/artifacts/program_methods/pinata_token.bin
index 57a201c4..abc964b6 100644
Binary files a/artifacts/program_methods/pinata_token.bin and b/artifacts/program_methods/pinata_token.bin differ
diff --git a/artifacts/program_methods/privacy_preserving_circuit.bin b/artifacts/program_methods/privacy_preserving_circuit.bin
index dd613143..5bb93687 100644
Binary files a/artifacts/program_methods/privacy_preserving_circuit.bin and b/artifacts/program_methods/privacy_preserving_circuit.bin differ
diff --git a/artifacts/program_methods/token.bin b/artifacts/program_methods/token.bin
index 6366eba6..615c12eb 100644
Binary files a/artifacts/program_methods/token.bin and b/artifacts/program_methods/token.bin differ
diff --git a/artifacts/test_program_methods/auth_asserting_noop.bin b/artifacts/test_program_methods/auth_asserting_noop.bin
index f9e4d1d4..24fb426c 100644
Binary files a/artifacts/test_program_methods/auth_asserting_noop.bin and b/artifacts/test_program_methods/auth_asserting_noop.bin differ
diff --git a/artifacts/test_program_methods/auth_transfer_proxy.bin b/artifacts/test_program_methods/auth_transfer_proxy.bin
new file mode 100644
index 00000000..fa1306d0
Binary files /dev/null and b/artifacts/test_program_methods/auth_transfer_proxy.bin differ
diff --git a/artifacts/test_program_methods/burner.bin b/artifacts/test_program_methods/burner.bin
index 94a90236..59e8e43b 100644
Binary files a/artifacts/test_program_methods/burner.bin and b/artifacts/test_program_methods/burner.bin differ
diff --git a/artifacts/test_program_methods/chain_caller.bin b/artifacts/test_program_methods/chain_caller.bin
index 58331d6c..d1f22c57 100644
Binary files a/artifacts/test_program_methods/chain_caller.bin and b/artifacts/test_program_methods/chain_caller.bin differ
diff --git a/artifacts/test_program_methods/changer_claimer.bin b/artifacts/test_program_methods/changer_claimer.bin
index 2760b7a3..afe2b1c2 100644
Binary files a/artifacts/test_program_methods/changer_claimer.bin and b/artifacts/test_program_methods/changer_claimer.bin differ
diff --git a/artifacts/test_program_methods/claimer.bin b/artifacts/test_program_methods/claimer.bin
index ff504da1..df4466aa 100644
Binary files a/artifacts/test_program_methods/claimer.bin and b/artifacts/test_program_methods/claimer.bin differ
diff --git a/artifacts/test_program_methods/clock_chain_caller.bin b/artifacts/test_program_methods/clock_chain_caller.bin
index 37c9a004..13d81c8f 100644
Binary files a/artifacts/test_program_methods/clock_chain_caller.bin and b/artifacts/test_program_methods/clock_chain_caller.bin differ
diff --git a/artifacts/test_program_methods/data_changer.bin b/artifacts/test_program_methods/data_changer.bin
index 3d69b8cb..12d1ff64 100644
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diff --git a/artifacts/test_program_methods/extra_output.bin b/artifacts/test_program_methods/extra_output.bin
index 873ce66a..9ba00633 100644
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index 0846f255..7a5962f9 100644
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index 1e285245..544a1718 100644
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diff --git a/artifacts/test_program_methods/group_pda_spender.bin b/artifacts/test_program_methods/group_pda_spender.bin
new file mode 100644
index 00000000..16efb8a4
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diff --git a/artifacts/test_program_methods/malicious_authorization_changer.bin b/artifacts/test_program_methods/malicious_authorization_changer.bin
index cc757683..2034cbe7 100644
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diff --git a/artifacts/test_program_methods/malicious_caller_program_id.bin b/artifacts/test_program_methods/malicious_caller_program_id.bin
index f152051d..514d3302 100644
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diff --git a/artifacts/test_program_methods/malicious_self_program_id.bin b/artifacts/test_program_methods/malicious_self_program_id.bin
index 6d83b95b..45fa2e0b 100644
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index 29bcd715..623b25eb 100644
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index c7cc1571..72feec32 100644
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index 8f2b1e39..92b61443 100644
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index 993c1451..fed326c3 100644
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index 579db977..a4fcda58 100644
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diff --git a/artifacts/test_program_methods/pda_fund_spend_proxy.bin b/artifacts/test_program_methods/pda_fund_spend_proxy.bin
new file mode 100644
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diff --git a/artifacts/test_program_methods/pinata_cooldown.bin b/artifacts/test_program_methods/pinata_cooldown.bin
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diff --git a/artifacts/test_program_methods/private_pda_claimer.bin b/artifacts/test_program_methods/private_pda_claimer.bin
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diff --git a/artifacts/test_program_methods/private_pda_delegator.bin b/artifacts/test_program_methods/private_pda_delegator.bin
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diff --git a/artifacts/test_program_methods/time_locked_transfer.bin b/artifacts/test_program_methods/time_locked_transfer.bin
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diff --git a/artifacts/test_program_methods/validity_window.bin b/artifacts/test_program_methods/validity_window.bin
index 02ccc149..de524642 100644
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diff --git a/artifacts/test_program_methods/validity_window_chain_caller.bin b/artifacts/test_program_methods/validity_window_chain_caller.bin
index d239c750..020f0c9b 100644
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diff --git a/bedrock/deployment-settings.yaml b/bedrock/deployment-settings.yaml
index d0c05e24..7ef63f03 100644
--- a/bedrock/deployment-settings.yaml
+++ b/bedrock/deployment-settings.yaml
@@ -39,42 +39,42 @@ cryptarchia:
       threshold: 1
       timestamp: 0
   gossipsub_protocol: /integration/logos-blockchain/cryptarchia/proto/1.0.0
-  genesis_state:
-    mantle_tx:
-      ops:
+  genesis_block:
+    header:
+      version: Bedrock
+      parent_block: '0000000000000000000000000000000000000000000000000000000000000000'
+      slot: 0
+      block_root: b5f8787ac23674822414c70eea15d842da38f2e806ede1a73cf7b5cf0277da07
+      proof_of_leadership:
+        proof: '0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
+        entropy_contribution: '0000000000000000000000000000000000000000000000000000000000000000'
+        leader_key: '0000000000000000000000000000000000000000000000000000000000000000'
+        voucher_cm: '0000000000000000000000000000000000000000000000000000000000000000'
+    signature: '00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
+    transactions:
+    - mantle_tx:
+        ops:
         - opcode: 0
           payload:
-            inputs: [ ]
+            inputs: []
             outputs:
-              - value: 1
-                pk: d204000000000000000000000000000000000000000000000000000000000000
-              - value: 100
-                pk: 2e03b2eff5a45478e7e79668d2a146cf2c5c7925bce927f2b1c67f2ab4fc0d26
+            - value: 1
+              pk: d204000000000000000000000000000000000000000000000000000000000000
+            - value: 100
+              pk: '2e03b2eff5a45478e7e79668d2a146cf2c5c7925bce927f2b1c67f2ab4fc0d26'
+            - value: 1
+              pk: ed266e6e887b9b97059dc1aa1b7b2e19b934291753c6336a163fe4ebaa28e717
         - opcode: 17
           payload:
-            channel_id: "0000000000000000000000000000000000000000000000000000000000000000"
-            inscription: [ 103, 101, 110, 101, 115, 105, 115 ]  # "genesis" in bytes
-            parent: "0000000000000000000000000000000000000000000000000000000000000000"
-            signer: "0000000000000000000000000000000000000000000000000000000000000000"
-      execution_gas_price: 0
-      storage_gas_price: 0
-    ops_proofs:
-      - !ZkSig
-        pi_a: [
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
-        ]
-        pi_b: [
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
-        ]
-        pi_c: [
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-          0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
-        ]
-      - NoProof
+            channel_id: '0000000000000000000000000000000000000000000000000000000000000000'
+            inscription: '67656e65736973'
+            parent: '0000000000000000000000000000000000000000000000000000000000000000'
+            signer: '0000000000000000000000000000000000000000000000000000000000000000'
+        execution_gas_price: 0
+        storage_gas_price: 0
+      ops_proofs:
+      - !Ed25519Sig '00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
+      - !Ed25519Sig '00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
 time:
   slot_duration: '1.0'
   chain_start_time: PLACEHOLDER_CHAIN_START_TIME
diff --git a/bedrock/docker-compose.yml b/bedrock/docker-compose.yml
index 73795666..e16e505b 100644
--- a/bedrock/docker-compose.yml
+++ b/bedrock/docker-compose.yml
@@ -1,7 +1,7 @@
 services:
 
   logos-blockchain-node-0:
-    image: ghcr.io/logos-blockchain/logos-blockchain@sha256:c5243681b353278cabb562a176f0a5cfbefc2056f18cebc47fe0e3720c29fb12
+    image: ghcr.io/logos-blockchain/logos-blockchain@sha256:9f1829dea335c56f6ff68ae37ea872ed5313b96b69e8ffe143c02b7217de85fc
     ports:
       - "${PORT:-8080}:18080/tcp"
     volumes:
diff --git a/bedrock_client/Cargo.toml b/bedrock_client/Cargo.toml
deleted file mode 100644
index 2137cb74..00000000
--- a/bedrock_client/Cargo.toml
+++ /dev/null
@@ -1,23 +0,0 @@
-[package]
-name = "bedrock_client"
-version = "0.1.0"
-edition = "2024"
-license = { workspace = true }
-
-[lints]
-workspace = true
-
-[dependencies]
-common.workspace = true
-
-reqwest.workspace = true
-anyhow.workspace = true
-tokio-retry.workspace = true
-futures.workspace = true
-log.workspace = true
-serde.workspace = true
-humantime-serde.workspace = true
-logos-blockchain-common-http-client.workspace = true
-logos-blockchain-core.workspace = true
-logos-blockchain-chain-broadcast-service.workspace = true
-logos-blockchain-chain-service.workspace = true
diff --git a/bedrock_client/src/lib.rs b/bedrock_client/src/lib.rs
deleted file mode 100644
index 4e9bfffd..00000000
--- a/bedrock_client/src/lib.rs
+++ /dev/null
@@ -1,121 +0,0 @@
-use std::time::Duration;
-
-use anyhow::{Context as _, Result};
-use common::config::BasicAuth;
-use futures::{Stream, TryFutureExt as _};
-#[expect(clippy::single_component_path_imports, reason = "Satisfy machete")]
-use humantime_serde;
-use log::{info, warn};
-pub use logos_blockchain_chain_broadcast_service::BlockInfo;
-use logos_blockchain_chain_service::CryptarchiaInfo;
-pub use logos_blockchain_common_http_client::{CommonHttpClient, Error};
-pub use logos_blockchain_core::{block::Block, header::HeaderId, mantle::SignedMantleTx};
-use reqwest::{Client, Url};
-use serde::{Deserialize, Serialize};
-use tokio_retry::Retry;
-
-/// Fibonacci backoff retry strategy configuration.
-#[derive(Debug, Copy, Clone, Serialize, Deserialize)]
-pub struct BackoffConfig {
-    #[serde(with = "humantime_serde")]
-    pub start_delay: Duration,
-    pub max_retries: usize,
-}
-
-impl Default for BackoffConfig {
-    fn default() -> Self {
-        Self {
-            start_delay: Duration::from_millis(100),
-            max_retries: 5,
-        }
-    }
-}
-
-/// Simple wrapper
-/// maybe extend in the future for our purposes
-/// `Clone` is cheap because `CommonHttpClient` is internally reference counted (`Arc`).
-#[derive(Clone)]
-pub struct BedrockClient {
-    http_client: CommonHttpClient,
-    node_url: Url,
-    backoff: BackoffConfig,
-}
-
-impl BedrockClient {
-    pub fn new(backoff: BackoffConfig, node_url: Url, auth: Option<BasicAuth>) -> Result<Self> {
-        info!("Creating Bedrock client with node URL {node_url}");
-        let client = Client::builder()
-                //Add more fields if needed
-                .timeout(std::time::Duration::from_mins(1))
-                .build()
-                .context("Failed to build HTTP client")?;
-
-        let auth = auth.map(|a| {
-            logos_blockchain_common_http_client::BasicAuthCredentials::new(a.username, a.password)
-        });
-
-        let http_client = CommonHttpClient::new_with_client(client, auth);
-        Ok(Self {
-            http_client,
-            node_url,
-            backoff,
-        })
-    }
-
-    pub async fn post_transaction(&self, tx: SignedMantleTx) -> Result<Result<(), Error>, Error> {
-        Retry::spawn(self.backoff_strategy(), || async {
-            match self
-                .http_client
-                .post_transaction(self.node_url.clone(), tx.clone())
-                .await
-            {
-                Ok(()) => Ok(Ok(())),
-                Err(err) => match err {
-                    // Retry arm.
-                    // Retrying only reqwest errors: mainly connected to http.
-                    Error::Request(_) => Err(err),
-                    // Returning non-retryable error
-                    Error::Server(_) | Error::Client(_) | Error::Url(_) => Ok(Err(err)),
-                },
-            }
-        })
-        .await
-    }
-
-    pub async fn get_lib_stream(&self) -> Result<impl Stream<Item = BlockInfo>, Error> {
-        self.http_client.get_lib_stream(self.node_url.clone()).await
-    }
-
-    pub async fn get_block_by_id(
-        &self,
-        header_id: HeaderId,
-    ) -> Result<Option<Block<SignedMantleTx>>, Error> {
-        Retry::spawn(self.backoff_strategy(), || {
-            self.http_client
-                .get_block_by_id(self.node_url.clone(), header_id)
-                .inspect_err(|err| warn!("Block fetching failed with error: {err:#}"))
-        })
-        .await
-    }
-
-    pub async fn get_consensus_info(&self) -> Result<CryptarchiaInfo, Error> {
-        Retry::spawn(self.backoff_strategy(), || {
-            self.http_client
-                .consensus_info(self.node_url.clone())
-                .inspect_err(|err| warn!("Block fetching failed with error: {err:#}"))
-        })
-        .await
-    }
-
-    fn backoff_strategy(&self) -> impl Iterator<Item = Duration> {
-        let start_delay_millis = self
-            .backoff
-            .start_delay
-            .as_millis()
-            .try_into()
-            .expect("Start delay must be less than u64::MAX milliseconds");
-
-        tokio_retry::strategy::FibonacciBackoff::from_millis(start_delay_millis)
-            .take(self.backoff.max_retries)
-    }
-}
diff --git a/common/src/block.rs b/common/src/block.rs
index 3f354c2d..fbc4c9a6 100644
--- a/common/src/block.rs
+++ b/common/src/block.rs
@@ -114,11 +114,6 @@ impl HashableBlockData {
             bedrock_parent_id,
         }
     }
-
-    #[must_use]
-    pub fn block_hash(&self) -> BlockHash {
-        OwnHasher::hash(&borsh::to_vec(&self).unwrap())
-    }
 }
 
 impl From<Block> for HashableBlockData {
diff --git a/configs/docker-all-in-one/indexer_config.json b/configs/docker-all-in-one/indexer_config.json
index c2b07e3e..ca99a90c 100644
--- a/configs/docker-all-in-one/indexer_config.json
+++ b/configs/docker-all-in-one/indexer_config.json
@@ -1,12 +1,8 @@
 {
     "home": "./indexer/service",
     "consensus_info_polling_interval": "1s",
-    "bedrock_client_config": {
-        "addr": "http://logos-blockchain-node-0:18080",
-        "backoff": {
-            "start_delay": "100ms",
-            "max_retries": 5
-        }
+    "bedrock_config": {
+        "addr": "http://logos-blockchain-node-0:18080"
     },
     "channel_id": "0101010101010101010101010101010101010101010101010101010101010101",
     "initial_accounts": [
diff --git a/indexer/core/Cargo.toml b/indexer/core/Cargo.toml
index 33fe2d9d..d609f5cb 100644
--- a/indexer/core/Cargo.toml
+++ b/indexer/core/Cargo.toml
@@ -9,7 +9,7 @@ workspace = true
 
 [dependencies]
 common.workspace = true
-bedrock_client.workspace = true
+logos-blockchain-zone-sdk.workspace = true
 nssa.workspace = true
 nssa_core.workspace = true
 storage.workspace = true
@@ -19,13 +19,13 @@ anyhow.workspace = true
 log.workspace = true
 serde.workspace = true
 humantime-serde.workspace = true
-tokio.workspace = true
 borsh.workspace = true
 futures.workspace = true
 url.workspace = true
 logos-blockchain-core.workspace = true
 serde_json.workspace = true
 async-stream.workspace = true
+tokio.workspace = true
 
 [dev-dependencies]
 tempfile.workspace = true
diff --git a/indexer/core/src/block_store.rs b/indexer/core/src/block_store.rs
index cff07b0f..bfba5ed2 100644
--- a/indexer/core/src/block_store.rs
+++ b/indexer/core/src/block_store.rs
@@ -1,11 +1,12 @@
 use std::{path::Path, sync::Arc};
 
-use anyhow::Result;
-use bedrock_client::HeaderId;
+use anyhow::{Context as _, Result};
 use common::{
     block::{BedrockStatus, Block},
     transaction::{NSSATransaction, clock_invocation},
 };
+use logos_blockchain_core::{header::HeaderId, mantle::ops::channel::MsgId};
+use logos_blockchain_zone_sdk::Slot;
 use nssa::{Account, AccountId, V03State};
 use nssa_core::BlockId;
 use storage::indexer::RocksDBIO;
@@ -103,6 +104,22 @@ impl IndexerStore {
         Ok(self.dbio.calculate_state_for_id(block_id)?)
     }
 
+    pub fn get_zone_cursor(&self) -> Result<Option<(MsgId, Slot)>> {
+        let Some(bytes) = self.dbio.get_zone_sdk_indexer_cursor_bytes()? else {
+            return Ok(None);
+        };
+        let cursor: (MsgId, Slot) = serde_json::from_slice(&bytes)
+            .context("Failed to deserialize stored zone-sdk indexer cursor")?;
+        Ok(Some(cursor))
+    }
+
+    pub fn set_zone_cursor(&self, cursor: &(MsgId, Slot)) -> Result<()> {
+        let bytes =
+            serde_json::to_vec(cursor).context("Failed to serialize zone-sdk indexer cursor")?;
+        self.dbio.put_zone_sdk_indexer_cursor_bytes(&bytes)?;
+        Ok(())
+    }
+
     /// Recalculation of final state directly from DB.
     ///
     /// Used for indexer healthcheck.
@@ -118,6 +135,12 @@ impl IndexerStore {
             .get_account_by_id(*account_id))
     }
 
+    pub fn account_state_at_block(&self, account_id: &AccountId, block_id: u64) -> Result<Account> {
+        Ok(self
+            .get_state_at_block(block_id)?
+            .get_account_by_id(*account_id))
+    }
+
     pub async fn put_block(&self, mut block: Block, l1_header: HeaderId) -> Result<()> {
         {
             let mut state_guard = self.current_state.write().await;
@@ -260,4 +283,64 @@ mod tests {
         assert_eq!(acc1_val.balance, 9920);
         assert_eq!(acc2_val.balance, 20080);
     }
+
+    #[tokio::test]
+    async fn account_state_at_block() {
+        let home = tempdir().unwrap();
+
+        let storage = IndexerStore::open_db_with_genesis(
+            home.as_ref(),
+            &genesis_block(),
+            &nssa::V03State::new_with_genesis_accounts(
+                &[(acc1(), 10000), (acc2(), 20000)],
+                vec![],
+                0,
+            ),
+        )
+        .unwrap();
+
+        let mut prev_hash = genesis_block().header.hash;
+
+        let from = acc1();
+        let to = acc2();
+        let sign_key = acc1_sign_key();
+
+        for i in 2..10 {
+            let tx = common::test_utils::create_transaction_native_token_transfer(
+                from,
+                i - 2,
+                to,
+                10,
+                &sign_key,
+            );
+            let block_id = u64::try_from(i).unwrap();
+
+            let next_block =
+                common::test_utils::produce_dummy_block(block_id, Some(prev_hash), vec![tx]);
+            prev_hash = next_block.header.hash;
+
+            storage
+                .put_block(next_block, HeaderId::from([u8::try_from(i).unwrap(); 32]))
+                .await
+                .unwrap();
+        }
+
+        // Genesis block: no transfers applied yet.
+        let acc1_at_1 = storage.account_state_at_block(&acc1(), 1).unwrap();
+        let acc2_at_1 = storage.account_state_at_block(&acc2(), 1).unwrap();
+        assert_eq!(acc1_at_1.balance, 10000);
+        assert_eq!(acc2_at_1.balance, 20000);
+
+        // After block 5: 4 transfers of 10 applied (one each in blocks 2..=5).
+        let acc1_at_5 = storage.account_state_at_block(&acc1(), 5).unwrap();
+        let acc2_at_5 = storage.account_state_at_block(&acc2(), 5).unwrap();
+        assert_eq!(acc1_at_5.balance, 9960);
+        assert_eq!(acc2_at_5.balance, 20040);
+
+        // After final block 9: 8 transfers applied; should match current state.
+        let acc1_at_9 = storage.account_state_at_block(&acc1(), 9).unwrap();
+        let acc2_at_9 = storage.account_state_at_block(&acc2(), 9).unwrap();
+        assert_eq!(acc1_at_9.balance, 9920);
+        assert_eq!(acc2_at_9.balance, 20080);
+    }
 }
diff --git a/indexer/core/src/config.rs b/indexer/core/src/config.rs
index 291e54f5..40ac0870 100644
--- a/indexer/core/src/config.rs
+++ b/indexer/core/src/config.rs
@@ -6,7 +6,6 @@ use std::{
 };
 
 use anyhow::{Context as _, Result};
-pub use bedrock_client::BackoffConfig;
 use common::config::BasicAuth;
 use humantime_serde;
 pub use logos_blockchain_core::mantle::ops::channel::ChannelId;
@@ -16,8 +15,6 @@ use url::Url;
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct ClientConfig {
-    /// For individual RPC requests we use Fibonacci backoff retry strategy.
-    pub backoff: BackoffConfig,
     pub addr: Url,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub auth: Option<BasicAuth>,
@@ -31,7 +28,7 @@ pub struct IndexerConfig {
     pub signing_key: [u8; 32],
     #[serde(with = "humantime_serde")]
     pub consensus_info_polling_interval: Duration,
-    pub bedrock_client_config: ClientConfig,
+    pub bedrock_config: ClientConfig,
     pub channel_id: ChannelId,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub initial_public_accounts: Option<Vec<PublicAccountPublicInitialData>>,
diff --git a/indexer/core/src/lib.rs b/indexer/core/src/lib.rs
index 44f0dc19..eeb31ebb 100644
--- a/indexer/core/src/lib.rs
+++ b/indexer/core/src/lib.rs
@@ -1,15 +1,14 @@
-use std::collections::VecDeque;
+use std::sync::Arc;
 
 use anyhow::Result;
-use bedrock_client::{BedrockClient, HeaderId};
-use common::{
-    HashType, PINATA_BASE58,
-    block::{Block, HashableBlockData},
-};
-use log::{debug, error, info};
-use logos_blockchain_core::mantle::{
-    Op, SignedMantleTx,
-    ops::channel::{ChannelId, inscribe::InscriptionOp},
+use common::block::{Block, HashableBlockData};
+// ToDo: Remove after testnet
+use common::{HashType, PINATA_BASE58};
+use futures::StreamExt as _;
+use log::{error, info, warn};
+use logos_blockchain_core::header::HeaderId;
+use logos_blockchain_zone_sdk::{
+    CommonHttpClient, ZoneMessage, adapter::NodeHttpClient, indexer::ZoneIndexer,
 };
 use nssa::V03State;
 use testnet_initial_state::initial_state_testnet;
@@ -21,25 +20,11 @@ pub mod config;
 
 #[derive(Clone)]
 pub struct IndexerCore {
-    pub bedrock_client: BedrockClient,
+    pub zone_indexer: Arc<ZoneIndexer<NodeHttpClient>>,
     pub config: IndexerConfig,
     pub store: IndexerStore,
 }
 
-#[derive(Clone)]
-/// This struct represents one L1 block data fetched from backfilling.
-pub struct BackfillBlockData {
-    l2_blocks: Vec<Block>,
-    l1_header: HeaderId,
-}
-
-#[derive(Clone)]
-/// This struct represents data fetched fom backfilling in one iteration.
-pub struct BackfillData {
-    block_data: VecDeque<BackfillBlockData>,
-    curr_fin_l1_lib_header: HeaderId,
-}
-
 impl IndexerCore {
     pub fn new(config: IndexerConfig) -> Result<Self> {
         let hashable_data = HashableBlockData {
@@ -63,7 +48,7 @@ impl IndexerCore {
                     .iter()
                     .map(|init_comm_data| {
                         let npk = &init_comm_data.npk;
-                        let account_id = nssa::AccountId::from((npk, 0));
+                        let account_id = nssa::AccountId::for_regular_private_account(npk, 0);
 
                         let mut acc = init_comm_data.account.clone();
 
@@ -107,279 +92,88 @@ impl IndexerCore {
 
         let home = config.home.join("rocksdb");
 
+        let basic_auth = config.bedrock_config.auth.clone().map(Into::into);
+        let node = NodeHttpClient::new(
+            CommonHttpClient::new(basic_auth),
+            config.bedrock_config.addr.clone(),
+        );
+        let zone_indexer = ZoneIndexer::new(config.channel_id, node);
+
         Ok(Self {
-            bedrock_client: BedrockClient::new(
-                config.bedrock_client_config.backoff,
-                config.bedrock_client_config.addr.clone(),
-                config.bedrock_client_config.auth.clone(),
-            )?,
+            zone_indexer: Arc::new(zone_indexer),
             config,
             store: IndexerStore::open_db_with_genesis(&home, &genesis_block, &state)?,
         })
     }
 
-    pub fn subscribe_parse_block_stream(&self) -> impl futures::Stream<Item = Result<Block>> {
+    pub fn subscribe_parse_block_stream(&self) -> impl futures::Stream<Item = Result<Block>> + '_ {
+        let poll_interval = self.config.consensus_info_polling_interval;
+        let initial_cursor = self
+            .store
+            .get_zone_cursor()
+            .expect("Failed to load zone-sdk indexer cursor");
+
         async_stream::stream! {
-            info!("Searching for initial header");
+            let mut cursor = initial_cursor;
 
-            let last_stored_l1_lib_header = self.store.last_observed_l1_lib_header()?;
-
-            let mut prev_last_l1_lib_header = if let Some(last_l1_lib_header) = last_stored_l1_lib_header {
-                info!("Last l1 lib header found: {last_l1_lib_header}");
-                last_l1_lib_header
+            if cursor.is_some() {
+                info!("Resuming indexer from cursor {cursor:?}");
             } else {
-                info!("Last l1 lib header not found in DB");
-                info!("Searching for the start of a channel");
-
-                let BackfillData {
-                    block_data: start_buff,
-                    curr_fin_l1_lib_header: last_l1_lib_header,
-                } = self.search_for_channel_start().await?;
-
-                for BackfillBlockData {
-                    l2_blocks: l2_block_vec,
-                    l1_header,
-                } in start_buff {
-                    let mut l2_blocks_parsed_ids: Vec<_> = l2_block_vec.iter().map(|block| block.header.block_id).collect();
-                    l2_blocks_parsed_ids.sort_unstable();
-                    info!("Parsed {} L2 blocks with ids {:?}", l2_block_vec.len(), l2_blocks_parsed_ids);
-
-                    for l2_block in l2_block_vec {
-                        // TODO: proper fix is to make the sequencer's genesis include a
-                        // trailing `clock_invocation(0)` (and have the indexer's
-                        // `open_db_with_genesis` not pre-apply state transitions) so the
-                        // inscribed genesis can flow through `put_block` like any other
-                        // block. For now we skip re-applying it.
-                        //
-                        // The channel-start (block_id == 1) is the sequencer's genesis
-                        // inscription that we re-discover during initial search. The
-                        // indexer already has its own locally-constructed genesis in
-                        // the store from `open_db_with_genesis`, so re-applying the
-                        // inscribed copy is both redundant and would fail the strict
-                        // block validation in `put_block` (the inscribed genesis lacks
-                        // the trailing clock invocation).
-                        if l2_block.header.block_id != 1 {
-                            self
-                            .store
-                            .put_block(l2_block.clone(), l1_header)
-                            .await
-                            .inspect_err(|err| error!("Failed to put block with err {err:?}"))?;
-                        }
-
-                        yield Ok(l2_block);
-                    }
-                }
-
-                last_l1_lib_header
-            };
-
-            info!("Searching for initial header finished");
-
-            info!("Starting backfilling from {prev_last_l1_lib_header}");
+                info!("Starting indexer from beginning of channel");
+            }
 
             loop {
-                let BackfillData {
-                    block_data: buff,
-                    curr_fin_l1_lib_header,
-                } = self
-                    .backfill_to_last_l1_lib_header_id(prev_last_l1_lib_header, &self.config.channel_id)
-                    .await
-                    .inspect_err(|err| error!("Failed to backfill to last l1 lib header id with err {err:#?}"))?;
-
-                prev_last_l1_lib_header = curr_fin_l1_lib_header;
-
-                for BackfillBlockData {
-                    l2_blocks: l2_block_vec,
-                    l1_header: header,
-                } in buff {
-                    let mut l2_blocks_parsed_ids: Vec<_> = l2_block_vec.iter().map(|block| block.header.block_id).collect();
-                    l2_blocks_parsed_ids.sort_unstable();
-                    info!("Parsed {} L2 blocks with ids {:?}", l2_block_vec.len(), l2_blocks_parsed_ids);
-
-                    for l2_block in l2_block_vec {
-                        self.store.put_block(l2_block.clone(), header).await?;
-
-                        yield Ok(l2_block);
+                let stream = match self.zone_indexer.next_messages(cursor).await {
+                    Ok(s) => s,
+                    Err(err) => {
+                        error!("Failed to start zone-sdk next_messages stream: {err}");
+                        tokio::time::sleep(poll_interval).await;
+                        continue;
                     }
-                }
-            }
-        }
-    }
-
-    async fn get_lib(&self) -> Result<HeaderId> {
-        Ok(self.bedrock_client.get_consensus_info().await?.lib)
-    }
-
-    async fn get_next_lib(&self, prev_lib: HeaderId) -> Result<HeaderId> {
-        loop {
-            let next_lib = self.get_lib().await?;
-            if next_lib == prev_lib {
-                info!(
-                    "Wait {:?} to not spam the node",
-                    self.config.consensus_info_polling_interval
-                );
-                tokio::time::sleep(self.config.consensus_info_polling_interval).await;
-            } else {
-                break Ok(next_lib);
-            }
-        }
-    }
-
-    /// WARNING: depending on channel state,
-    /// may take indefinite amount of time.
-    pub async fn search_for_channel_start(&self) -> Result<BackfillData> {
-        let mut curr_last_l1_lib_header = self.get_lib().await?;
-        let mut backfill_start = curr_last_l1_lib_header;
-        // ToDo: How to get root?
-        let mut backfill_limit = HeaderId::from([0; 32]);
-        // ToDo: Not scalable, initial buffer should be stored in DB to not run out of memory
-        // Don't want to complicate DB even more right now.
-        let mut block_buffer = VecDeque::new();
-
-        'outer: loop {
-            let mut cycle_header = curr_last_l1_lib_header;
-
-            loop {
-                let Some(cycle_block) = self.bedrock_client.get_block_by_id(cycle_header).await?
-                else {
-                    // First run can reach root easily
-                    // so here we are optimistic about L1
-                    // failing to get parent.
-                    break;
                 };
+                let mut stream = std::pin::pin!(stream);
 
-                // It would be better to have id, but block does not have it, so slot will do.
-                info!(
-                    "INITIAL SEARCH: Observed L1 block at slot {}",
-                    cycle_block.header().slot().into_inner()
-                );
-                debug!(
-                    "INITIAL SEARCH: This block header is {}",
-                    cycle_block.header().id()
-                );
-                debug!(
-                    "INITIAL SEARCH: This block parent is {}",
-                    cycle_block.header().parent()
-                );
+                while let Some((msg, slot)) = stream.next().await {
+                    let zone_block = match msg {
+                        ZoneMessage::Block(b) => b,
+                        // Non-block messages don't carry a cursor position; the
+                        // next ZoneBlock advances past them implicitly.
+                        ZoneMessage::Deposit(_) | ZoneMessage::Withdraw(_) => continue,
+                    };
 
-                let (l2_block_vec, l1_header) =
-                    parse_block_owned(&cycle_block, &self.config.channel_id);
+                    let block: Block = match borsh::from_slice(&zone_block.data) {
+                        Ok(b) => b,
+                        Err(e) => {
+                            error!("Failed to deserialize L2 block from zone-sdk: {e}");
+                            // Advance past the broken inscription so we don't
+                            // re-process it on restart.
+                            cursor = Some((zone_block.id, slot));
+                            if let Err(err) = self.store.set_zone_cursor(&(zone_block.id, slot)) {
+                                warn!("Failed to persist indexer cursor: {err:#}");
+                            }
+                            continue;
+                        }
+                    };
 
-                info!("Parsed {} L2 blocks", l2_block_vec.len());
+                    info!("Indexed L2 block {}", block.header.block_id);
 
-                if !l2_block_vec.is_empty() {
-                    block_buffer.push_front(BackfillBlockData {
-                        l2_blocks: l2_block_vec.clone(),
-                        l1_header,
-                    });
-                }
-
-                if let Some(first_l2_block) = l2_block_vec.first()
-                    && first_l2_block.header.block_id == 1
-                {
-                    info!("INITIAL_SEARCH: Found channel start");
-                    break 'outer;
-                }
-
-                // Step back to parent
-                let parent = cycle_block.header().parent();
-
-                if parent == backfill_limit {
-                    break;
-                }
-
-                cycle_header = parent;
-            }
-
-            info!("INITIAL_SEARCH: Reached backfill limit, refetching last l1 lib header");
-
-            block_buffer.clear();
-            backfill_limit = backfill_start;
-            curr_last_l1_lib_header = self.get_next_lib(curr_last_l1_lib_header).await?;
-            backfill_start = curr_last_l1_lib_header;
-        }
-
-        Ok(BackfillData {
-            block_data: block_buffer,
-            curr_fin_l1_lib_header: curr_last_l1_lib_header,
-        })
-    }
-
-    pub async fn backfill_to_last_l1_lib_header_id(
-        &self,
-        last_fin_l1_lib_header: HeaderId,
-        channel_id: &ChannelId,
-    ) -> Result<BackfillData> {
-        let curr_fin_l1_lib_header = self.get_next_lib(last_fin_l1_lib_header).await?;
-        // ToDo: Not scalable, buffer should be stored in DB to not run out of memory
-        // Don't want to complicate DB even more right now.
-        let mut block_buffer = VecDeque::new();
-
-        let mut cycle_header = curr_fin_l1_lib_header;
-        loop {
-            let Some(cycle_block) = self.bedrock_client.get_block_by_id(cycle_header).await? else {
-                return Err(anyhow::anyhow!("Parent not found"));
-            };
-
-            if cycle_block.header().id() == last_fin_l1_lib_header {
-                break;
-            }
-            // Step back to parent
-            cycle_header = cycle_block.header().parent();
-
-            // It would be better to have id, but block does not have it, so slot will do.
-            info!(
-                "Observed L1 block at slot {}",
-                cycle_block.header().slot().into_inner()
-            );
-
-            let (l2_block_vec, l1_header) = parse_block_owned(&cycle_block, channel_id);
-
-            info!("Parsed {} L2 blocks", l2_block_vec.len());
-
-            if !l2_block_vec.is_empty() {
-                block_buffer.push_front(BackfillBlockData {
-                    l2_blocks: l2_block_vec,
-                    l1_header,
-                });
-            }
-        }
-
-        Ok(BackfillData {
-            block_data: block_buffer,
-            curr_fin_l1_lib_header,
-        })
-    }
-}
-
-fn parse_block_owned(
-    l1_block: &bedrock_client::Block<SignedMantleTx>,
-    decoded_channel_id: &ChannelId,
-) -> (Vec<Block>, HeaderId) {
-    (
-        #[expect(
-            clippy::wildcard_enum_match_arm,
-            reason = "We are only interested in channel inscription ops, so it's fine to ignore the rest"
-        )]
-        l1_block
-            .transactions()
-            .flat_map(|tx| {
-                tx.mantle_tx.ops.iter().filter_map(|op| match op {
-                    Op::ChannelInscribe(InscriptionOp {
-                        channel_id,
-                        inscription,
-                        ..
-                    }) if channel_id == decoded_channel_id => {
-                        borsh::from_slice::<Block>(inscription)
-                            .inspect_err(|err| {
-                                error!("Failed to deserialize our inscription with err: {err:#?}");
-                            })
-                            .ok()
+                    // TODO: Remove l1_header placeholder once storage layer
+                    // no longer requires it. Zone-sdk handles L1 tracking internally.
+                    let placeholder_l1_header = HeaderId::from([0_u8; 32]);
+                    if let Err(err) = self.store.put_block(block.clone(), placeholder_l1_header).await {
+                        error!("Failed to store block {}: {err:#}", block.header.block_id);
                     }
-                    _ => None,
-                })
-            })
-            .collect(),
-        l1_block.header().id(),
-    )
+
+                    cursor = Some((zone_block.id, slot));
+                    if let Err(err) = self.store.set_zone_cursor(&(zone_block.id, slot)) {
+                        warn!("Failed to persist indexer cursor: {err:#}");
+                    }
+                    yield Ok(block);
+                }
+
+                // Stream ended (caught up to LIB). Sleep then poll again.
+                tokio::time::sleep(poll_interval).await;
+            }
+        }
+    }
 }
diff --git a/indexer_ffi/Cargo.toml b/indexer/ffi/Cargo.toml
similarity index 71%
rename from indexer_ffi/Cargo.toml
rename to indexer/ffi/Cargo.toml
index b55230c6..1e6b1468 100644
--- a/indexer_ffi/Cargo.toml
+++ b/indexer/ffi/Cargo.toml
@@ -5,9 +5,16 @@ name = "indexer_ffi"
 version = "0.1.0"
 
 [dependencies]
+nssa.workspace = true
 indexer_service.workspace = true
+indexer_service_rpc = { workspace = true, features = ["client"] }
+indexer_service_protocol.workspace = true
+
+url.workspace = true
 log = { workspace = true }
 tokio = { features = ["rt-multi-thread"], workspace = true }
+jsonrpsee.workspace = true
+anyhow.workspace = true
 
 [build-dependencies]
 cbindgen = "0.29"
diff --git a/indexer_ffi/build.rs b/indexer/ffi/build.rs
similarity index 100%
rename from indexer_ffi/build.rs
rename to indexer/ffi/build.rs
diff --git a/indexer_ffi/cbindgen.toml b/indexer/ffi/cbindgen.toml
similarity index 100%
rename from indexer_ffi/cbindgen.toml
rename to indexer/ffi/cbindgen.toml
diff --git a/indexer/ffi/indexer_ffi.h b/indexer/ffi/indexer_ffi.h
new file mode 100644
index 00000000..7626b3b3
--- /dev/null
+++ b/indexer/ffi/indexer_ffi.h
@@ -0,0 +1,685 @@
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+typedef enum OperationStatus {
+  Ok = 0,
+  NullPointer = 1,
+  InitializationError = 2,
+  ClientError = 3,
+} OperationStatus;
+
+typedef enum FfiTransactionKind {
+  Public = 0,
+  Private,
+  ProgramDeploy,
+} FfiTransactionKind;
+
+typedef enum FfiBedrockStatus {
+  Pending = 0,
+  Safe,
+  Finalized,
+} FfiBedrockStatus;
+
+typedef struct IndexerServiceFFI {
+  void *indexer_handle;
+  void *runtime;
+  void *indexer_client;
+} IndexerServiceFFI;
+
+/**
+ * Simple wrapper around a pointer to a value or an error.
+ *
+ * Pointer is not guaranteed. You should check the error field before
+ * dereferencing the pointer.
+ */
+typedef struct PointerResult_IndexerServiceFFI__OperationStatus {
+  struct IndexerServiceFFI *value;
+  enum OperationStatus error;
+} PointerResult_IndexerServiceFFI__OperationStatus;
+
+typedef struct PointerResult_IndexerServiceFFI__OperationStatus InitializedIndexerServiceFFIResult;
+
+/**
+ * Simple wrapper around a pointer to a value or an error.
+ *
+ * Pointer is not guaranteed. You should check the error field before
+ * dereferencing the pointer.
+ */
+typedef struct PointerResult_u64__OperationStatus {
+  uint64_t *value;
+  enum OperationStatus error;
+} PointerResult_u64__OperationStatus;
+
+typedef uint64_t FfiBlockId;
+
+/**
+ * 32-byte array type for `AccountId`, keys, hashes, etc.
+ */
+typedef struct FfiBytes32 {
+  uint8_t data[32];
+} FfiBytes32;
+
+typedef struct FfiBytes32 FfiHashType;
+
+typedef uint64_t FfiTimestamp;
+
+/**
+ * 64-byte array type for signatures, etc.
+ */
+typedef struct FfiBytes64 {
+  uint8_t data[64];
+} FfiBytes64;
+
+typedef struct FfiBytes64 FfiSignature;
+
+typedef struct FfiBlockHeader {
+  FfiBlockId block_id;
+  FfiHashType prev_block_hash;
+  FfiHashType hash;
+  FfiTimestamp timestamp;
+  FfiSignature signature;
+} FfiBlockHeader;
+
+/**
+ * Program ID - 8 u32 values (32 bytes total).
+ */
+typedef struct FfiProgramId {
+  uint32_t data[8];
+} FfiProgramId;
+
+typedef struct FfiBytes32 FfiAccountId;
+
+typedef struct FfiVec_FfiAccountId {
+  FfiAccountId *entries;
+  uintptr_t len;
+  uintptr_t capacity;
+} FfiVec_FfiAccountId;
+
+typedef struct FfiVec_FfiAccountId FfiAccountIdList;
+
+/**
+ * U128 - 16 bytes little endian.
+ */
+typedef struct FfiU128 {
+  uint8_t data[16];
+} FfiU128;
+
+typedef struct FfiU128 FfiNonce;
+
+typedef struct FfiVec_FfiNonce {
+  FfiNonce *entries;
+  uintptr_t len;
+  uintptr_t capacity;
+} FfiVec_FfiNonce;
+
+typedef struct FfiVec_FfiNonce FfiNonceList;
+
+typedef struct FfiVec_u32 {
+  uint32_t *entries;
+  uintptr_t len;
+  uintptr_t capacity;
+} FfiVec_u32;
+
+typedef struct FfiVec_u32 FfiInstructionDataList;
+
+typedef struct FfiPublicMessage {
+  struct FfiProgramId program_id;
+  FfiAccountIdList account_ids;
+  FfiNonceList nonces;
+  FfiInstructionDataList instruction_data;
+} FfiPublicMessage;
+
+typedef struct FfiBytes32 FfiPublicKey;
+
+typedef struct FfiSignaturePubKeyEntry {
+  FfiSignature signature;
+  FfiPublicKey public_key;
+} FfiSignaturePubKeyEntry;
+
+typedef struct FfiVec_FfiSignaturePubKeyEntry {
+  struct FfiSignaturePubKeyEntry *entries;
+  uintptr_t len;
+  uintptr_t capacity;
+} FfiVec_FfiSignaturePubKeyEntry;
+
+typedef struct FfiVec_FfiSignaturePubKeyEntry FfiSignaturePubKeyList;
+
+typedef struct FfiPublicTransactionBody {
+  FfiHashType hash;
+  struct FfiPublicMessage message;
+  FfiSignaturePubKeyList witness_set;
+} FfiPublicTransactionBody;
+
+/**
+ * Account data structure - C-compatible version of nssa Account.
+ *
+ * Note: `balance` and `nonce` are u128 values represented as little-endian
+ * byte arrays since C doesn't have native u128 support.
+ */
+typedef struct FfiAccount {
+  struct FfiProgramId program_owner;
+  /**
+   * Balance as little-endian [u8; 16].
+   */
+  struct FfiU128 balance;
+  /**
+   * Pointer to account data bytes.
+   */
+  uint8_t *data;
+  /**
+   * Length of account data.
+   */
+  uintptr_t data_len;
+  /**
+   * Capacity of account data.
+   */
+  uintptr_t data_cap;
+  /**
+   * Nonce as little-endian [u8; 16].
+   */
+  struct FfiU128 nonce;
+} FfiAccount;
+
+typedef struct FfiVec_FfiAccount {
+  struct FfiAccount *entries;
+  uintptr_t len;
+  uintptr_t capacity;
+} FfiVec_FfiAccount;
+
+typedef struct FfiVec_FfiAccount FfiAccountList;
+
+typedef struct FfiVec_u8 {
+  uint8_t *entries;
+  uintptr_t len;
+  uintptr_t capacity;
+} FfiVec_u8;
+
+typedef struct FfiVec_u8 FfiVecU8;
+
+typedef struct FfiEncryptedAccountData {
+  FfiVecU8 ciphertext;
+  FfiVecU8 epk;
+  uint8_t view_tag;
+} FfiEncryptedAccountData;
+
+typedef struct FfiVec_FfiEncryptedAccountData {
+  struct FfiEncryptedAccountData *entries;
+  uintptr_t len;
+  uintptr_t capacity;
+} FfiVec_FfiEncryptedAccountData;
+
+typedef struct FfiVec_FfiEncryptedAccountData FfiEncryptedAccountDataList;
+
+typedef struct FfiVec_FfiBytes32 {
+  struct FfiBytes32 *entries;
+  uintptr_t len;
+  uintptr_t capacity;
+} FfiVec_FfiBytes32;
+
+typedef struct FfiVec_FfiBytes32 FfiVecBytes32;
+
+typedef struct FfiNullifierCommitmentSet {
+  struct FfiBytes32 nullifier;
+  struct FfiBytes32 commitment_set_digest;
+} FfiNullifierCommitmentSet;
+
+typedef struct FfiVec_FfiNullifierCommitmentSet {
+  struct FfiNullifierCommitmentSet *entries;
+  uintptr_t len;
+  uintptr_t capacity;
+} FfiVec_FfiNullifierCommitmentSet;
+
+typedef struct FfiVec_FfiNullifierCommitmentSet FfiNullifierCommitmentSetList;
+
+typedef struct FfiPrivacyPreservingMessage {
+  FfiAccountIdList public_account_ids;
+  FfiNonceList nonces;
+  FfiAccountList public_post_states;
+  FfiEncryptedAccountDataList encrypted_private_post_states;
+  FfiVecBytes32 new_commitments;
+  FfiNullifierCommitmentSetList new_nullifiers;
+  uint64_t block_validity_window[2];
+  uint64_t timestamp_validity_window[2];
+} FfiPrivacyPreservingMessage;
+
+typedef FfiVecU8 FfiProof;
+
+typedef struct FfiPrivateTransactionBody {
+  FfiHashType hash;
+  struct FfiPrivacyPreservingMessage message;
+  FfiSignaturePubKeyList witness_set;
+  FfiProof proof;
+} FfiPrivateTransactionBody;
+
+typedef FfiVecU8 FfiProgramDeploymentMessage;
+
+typedef struct FfiProgramDeploymentTransactionBody {
+  FfiHashType hash;
+  FfiProgramDeploymentMessage message;
+} FfiProgramDeploymentTransactionBody;
+
+typedef struct FfiTransactionBody {
+  struct FfiPublicTransactionBody *public_body;
+  struct FfiPrivateTransactionBody *private_body;
+  struct FfiProgramDeploymentTransactionBody *program_deployment_body;
+} FfiTransactionBody;
+
+typedef struct FfiTransaction {
+  struct FfiTransactionBody body;
+  enum FfiTransactionKind kind;
+} FfiTransaction;
+
+typedef struct FfiVec_FfiTransaction {
+  struct FfiTransaction *entries;
+  uintptr_t len;
+  uintptr_t capacity;
+} FfiVec_FfiTransaction;
+
+typedef struct FfiVec_FfiTransaction FfiBlockBody;
+
+typedef struct FfiBytes32 FfiMsgId;
+
+typedef struct FfiBlock {
+  struct FfiBlockHeader header;
+  FfiBlockBody body;
+  enum FfiBedrockStatus bedrock_status;
+  FfiMsgId bedrock_parent_id;
+} FfiBlock;
+
+typedef struct FfiOption_FfiBlock {
+  struct FfiBlock *value;
+  bool is_some;
+} FfiOption_FfiBlock;
+
+typedef struct FfiOption_FfiBlock FfiBlockOpt;
+
+/**
+ * Simple wrapper around a pointer to a value or an error.
+ *
+ * Pointer is not guaranteed. You should check the error field before
+ * dereferencing the pointer.
+ */
+typedef struct PointerResult_FfiBlockOpt__OperationStatus {
+  FfiBlockOpt *value;
+  enum OperationStatus error;
+} PointerResult_FfiBlockOpt__OperationStatus;
+
+/**
+ * Simple wrapper around a pointer to a value or an error.
+ *
+ * Pointer is not guaranteed. You should check the error field before
+ * dereferencing the pointer.
+ */
+typedef struct PointerResult_FfiAccount__OperationStatus {
+  struct FfiAccount *value;
+  enum OperationStatus error;
+} PointerResult_FfiAccount__OperationStatus;
+
+typedef struct FfiOption_FfiTransaction {
+  struct FfiTransaction *value;
+  bool is_some;
+} FfiOption_FfiTransaction;
+
+/**
+ * Simple wrapper around a pointer to a value or an error.
+ *
+ * Pointer is not guaranteed. You should check the error field before
+ * dereferencing the pointer.
+ */
+typedef struct PointerResult_FfiOption_FfiTransaction_____OperationStatus {
+  struct FfiOption_FfiTransaction *value;
+  enum OperationStatus error;
+} PointerResult_FfiOption_FfiTransaction_____OperationStatus;
+
+typedef struct FfiVec_FfiBlock {
+  struct FfiBlock *entries;
+  uintptr_t len;
+  uintptr_t capacity;
+} FfiVec_FfiBlock;
+
+/**
+ * Simple wrapper around a pointer to a value or an error.
+ *
+ * Pointer is not guaranteed. You should check the error field before
+ * dereferencing the pointer.
+ */
+typedef struct PointerResult_FfiVec_FfiBlock_____OperationStatus {
+  struct FfiVec_FfiBlock *value;
+  enum OperationStatus error;
+} PointerResult_FfiVec_FfiBlock_____OperationStatus;
+
+typedef struct FfiOption_u64 {
+  uint64_t *value;
+  bool is_some;
+} FfiOption_u64;
+
+/**
+ * Simple wrapper around a pointer to a value or an error.
+ *
+ * Pointer is not guaranteed. You should check the error field before
+ * dereferencing the pointer.
+ */
+typedef struct PointerResult_FfiVec_FfiTransaction_____OperationStatus {
+  struct FfiVec_FfiTransaction *value;
+  enum OperationStatus error;
+} PointerResult_FfiVec_FfiTransaction_____OperationStatus;
+
+/**
+ * Creates and starts an indexer based on the provided
+ * configuration file path.
+ *
+ * # Arguments
+ *
+ * - `config_path`: A pointer to a string representing the path to the configuration file.
+ * - `port`: Number representing a port, on which indexers RPC will start.
+ *
+ * # Returns
+ *
+ * An `InitializedIndexerServiceFFIResult` containing either a pointer to the
+ * initialized `IndexerServiceFFI` or an error code.
+ */
+InitializedIndexerServiceFFIResult start_indexer(const char *config_path, uint16_t port);
+
+/**
+ * Stops and frees the resources associated with the given indexer service.
+ *
+ * # Arguments
+ *
+ * - `indexer`: A pointer to the `IndexerServiceFFI` instance to be stopped.
+ *
+ * # Returns
+ *
+ * An `OperationStatus` indicating success or failure.
+ *
+ * # Safety
+ *
+ * The caller must ensure that:
+ * - `indexer` is a valid pointer to a `IndexerServiceFFI` instance
+ * - The `IndexerServiceFFI` instance was created by this library
+ * - The pointer will not be used after this function returns
+ */
+enum OperationStatus stop_indexer(struct IndexerServiceFFI *indexer);
+
+/**
+ * # Safety
+ * It's up to the caller to pass a proper pointer, if somehow from c/c++ side
+ * this is called with a type which doesn't come from a returned `CString` it
+ * will cause a segfault.
+ */
+void free_cstring(char *block);
+
+/**
+ * Query the last block id from indexer.
+ *
+ * # Arguments
+ *
+ * - `indexer`: A pointer to the `IndexerServiceFFI` instance to be queried.
+ *
+ * # Returns
+ *
+ * A `PointerResult<u64, OperationStatus>` indicating success or failure.
+ *
+ * # Safety
+ *
+ * The caller must ensure that:
+ * - `indexer` is a valid pointer to a `IndexerServiceFFI` instance
+ */
+struct PointerResult_u64__OperationStatus query_last_block(const struct IndexerServiceFFI *indexer);
+
+/**
+ * Query the block by id from indexer.
+ *
+ * # Arguments
+ *
+ * - `indexer`: A pointer to the `IndexerServiceFFI` instance to be queried.
+ * - `block_id`: `u64` number of block id
+ *
+ * # Returns
+ *
+ * A `PointerResult<FfiBlockOpt, OperationStatus>` indicating success or failure.
+ *
+ * # Safety
+ *
+ * The caller must ensure that:
+ * - `indexer` is a valid pointer to a `IndexerServiceFFI` instance
+ */
+struct PointerResult_FfiBlockOpt__OperationStatus query_block(const struct IndexerServiceFFI *indexer,
+                                                              FfiBlockId block_id);
+
+/**
+ * Query the block by id from indexer.
+ *
+ * # Arguments
+ *
+ * - `indexer`: A pointer to the `IndexerServiceFFI` instance to be queried.
+ * - `hash`: `FfiHashType` - hash of block
+ *
+ * # Returns
+ *
+ * A `PointerResult<FfiBlockOpt, OperationStatus>` indicating success or failure.
+ *
+ * # Safety
+ *
+ * The caller must ensure that:
+ * - `indexer` is a valid pointer to a `IndexerServiceFFI` instance
+ */
+struct PointerResult_FfiBlockOpt__OperationStatus query_block_by_hash(const struct IndexerServiceFFI *indexer,
+                                                                      FfiHashType hash);
+
+/**
+ * Query the account by id from indexer.
+ *
+ * # Arguments
+ *
+ * - `indexer`: A pointer to the `IndexerServiceFFI` instance to be queried.
+ * - `account_id`: `FfiAccountId` - id of queried account
+ *
+ * # Returns
+ *
+ * A `PointerResult<FfiAccount, OperationStatus>` indicating success or failure.
+ *
+ * # Safety
+ *
+ * The caller must ensure that:
+ * - `indexer` is a valid pointer to a `IndexerServiceFFI` instance
+ */
+struct PointerResult_FfiAccount__OperationStatus query_account(const struct IndexerServiceFFI *indexer,
+                                                               FfiAccountId account_id);
+
+/**
+ * Query the trasnaction by hash from indexer.
+ *
+ * # Arguments
+ *
+ * - `indexer`: A pointer to the `IndexerServiceFFI` instance to be queried.
+ * - `hash`: `FfiHashType` - hash of transaction
+ *
+ * # Returns
+ *
+ * A `PointerResult<FfiOption<FfiTransaction>, OperationStatus>` indicating success or failure.
+ *
+ * # Safety
+ *
+ * The caller must ensure that:
+ * - `indexer` is a valid pointer to a `IndexerServiceFFI` instance
+ */
+struct PointerResult_FfiOption_FfiTransaction_____OperationStatus query_transaction(const struct IndexerServiceFFI *indexer,
+                                                                                    FfiHashType hash);
+
+/**
+ * Query the blocks by block range from indexer.
+ *
+ * # Arguments
+ *
+ * - `indexer`: A pointer to the `IndexerServiceFFI` instance to be queried.
+ * - `before`: `FfiOption<u64>` - end block of query
+ * - `limit`: `u64` - number of blocks to query before `before`
+ *
+ * # Returns
+ *
+ * A `PointerResult<FfiVec<FfiBlock>, OperationStatus>` indicating success or failure.
+ *
+ * # Safety
+ *
+ * The caller must ensure that:
+ * - `indexer` is a valid pointer to a `IndexerServiceFFI` instance
+ */
+struct PointerResult_FfiVec_FfiBlock_____OperationStatus query_block_vec(const struct IndexerServiceFFI *indexer,
+                                                                         struct FfiOption_u64 before,
+                                                                         uint64_t limit);
+
+/**
+ * Query the transactions range by account id from indexer.
+ *
+ * # Arguments
+ *
+ * - `indexer`: A pointer to the `IndexerServiceFFI` instance to be queried.
+ * - `account_id`: `FfiAccountId` - id of queried account
+ * - `offset`: `u64` - first tx id of query
+ * - `limit`: `u64` - number of tx ids to query after `offset`
+ *
+ * # Returns
+ *
+ * A `PointerResult<FfiVec<FfiBlock>, OperationStatus>` indicating success or failure.
+ *
+ * # Safety
+ *
+ * The caller must ensure that:
+ * - `indexer` is a valid pointer to a `IndexerServiceFFI` instance
+ */
+struct PointerResult_FfiVec_FfiTransaction_____OperationStatus query_transactions_by_account(const struct IndexerServiceFFI *indexer,
+                                                                                             FfiAccountId account_id,
+                                                                                             uint64_t offset,
+                                                                                             uint64_t limit);
+
+/**
+ * Frees the resources associated with the given ffi account.
+ *
+ * # Arguments
+ *
+ * - `val`: An instance of `FfiAccount`.
+ *
+ * # Returns
+ *
+ * void.
+ *
+ * # Safety
+ *
+ * The caller must ensure that:
+ * - `val` is a valid instance of `FfiAccount`.
+ */
+void free_ffi_account(struct FfiAccount val);
+
+/**
+ * Frees the resources associated with the given ffi block.
+ *
+ * # Arguments
+ *
+ * - `val`: An instance of `FfiBlock`.
+ *
+ * # Returns
+ *
+ * void.
+ *
+ * # Safety
+ *
+ * The caller must ensure that:
+ * - `val` is a valid instance of `FfiBlock`.
+ */
+void free_ffi_block(struct FfiBlock val);
+
+/**
+ * Frees the resources associated with the given ffi block option.
+ *
+ * # Arguments
+ *
+ * - `val`: An instance of `FfiBlockOpt`.
+ *
+ * # Returns
+ *
+ * void.
+ *
+ * # Safety
+ *
+ * The caller must ensure that:
+ * - `val` is a valid instance of `FfiBlockOpt`.
+ */
+void free_ffi_block_opt(FfiBlockOpt val);
+
+/**
+ * Frees the resources associated with the given ffi block vector.
+ *
+ * # Arguments
+ *
+ * - `val`: An instance of `FfiVec<FfiBlock>`.
+ *
+ * # Returns
+ *
+ * void.
+ *
+ * # Safety
+ *
+ * The caller must ensure that:
+ * - `val` is a valid instance of `FfiVec<FfiBlock>`.
+ */
+void free_ffi_block_vec(struct FfiVec_FfiBlock val);
+
+/**
+ * Frees the resources associated with the given ffi transaction.
+ *
+ * # Arguments
+ *
+ * - `val`: An instance of `FfiTransaction`.
+ *
+ * # Returns
+ *
+ * void.
+ *
+ * # Safety
+ *
+ * The caller must ensure that:
+ * - `val` is a valid instance of `FfiTransaction`.
+ */
+void free_ffi_transaction(struct FfiTransaction val);
+
+/**
+ * Frees the resources associated with the given ffi transaction option.
+ *
+ * # Arguments
+ *
+ * - `val`: An instance of `FfiOption<FfiTransaction>`.
+ *
+ * # Returns
+ *
+ * void.
+ *
+ * # Safety
+ *
+ * The caller must ensure that:
+ * - `val` is a valid instance of `FfiOption<FfiTransaction>`.
+ */
+void free_ffi_transaction_opt(struct FfiOption_FfiTransaction val);
+
+/**
+ * Frees the resources associated with the given vector of ffi transactions.
+ *
+ * # Arguments
+ *
+ * - `val`: An instance of `FfiVec<FfiTransaction>`.
+ *
+ * # Returns
+ *
+ * void.
+ *
+ * # Safety
+ *
+ * The caller must ensure that:
+ * - `val` is a valid instance of `FfiVec<FfiTransaction>`.
+ */
+void free_ffi_transaction_vec(struct FfiVec_FfiTransaction val);
+
+bool is_ok(const enum OperationStatus *self);
+
+bool is_error(const enum OperationStatus *self);
diff --git a/indexer/ffi/src/api/client.rs b/indexer/ffi/src/api/client.rs
new file mode 100644
index 00000000..825a57de
--- /dev/null
+++ b/indexer/ffi/src/api/client.rs
@@ -0,0 +1,36 @@
+use std::net::SocketAddr;
+
+use url::Url;
+
+use crate::OperationStatus;
+
+#[derive(Debug, Clone, Copy)]
+pub enum UrlProtocol {
+    Http,
+    Ws,
+}
+
+impl std::fmt::Display for UrlProtocol {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Http => write!(f, "http"),
+            Self::Ws => write!(f, "ws"),
+        }
+    }
+}
+
+pub(crate) fn addr_to_url(protocol: UrlProtocol, addr: SocketAddr) -> Result<Url, OperationStatus> {
+    // Convert 0.0.0.0 to 127.0.0.1 for client connections
+    // When binding to port 0, the server binds to 0.0.0.0:<random_port>
+    // but clients need to connect to 127.0.0.1:<port> to work reliably
+    let url_string = if addr.ip().is_unspecified() {
+        format!("{protocol}://127.0.0.1:{}", addr.port())
+    } else {
+        format!("{protocol}://{addr}")
+    };
+
+    url_string.parse().map_err(|e| {
+        log::error!("Could not parse indexer url: {e}");
+        OperationStatus::InitializationError
+    })
+}
diff --git a/indexer_ffi/src/api/lifecycle.rs b/indexer/ffi/src/api/lifecycle.rs
similarity index 84%
rename from indexer_ffi/src/api/lifecycle.rs
rename to indexer/ffi/src/api/lifecycle.rs
index 735efd4d..c9cd859d 100644
--- a/indexer_ffi/src/api/lifecycle.rs
+++ b/indexer/ffi/src/api/lifecycle.rs
@@ -2,7 +2,15 @@ use std::{ffi::c_char, path::PathBuf};
 
 use tokio::runtime::Runtime;
 
-use crate::{IndexerServiceFFI, api::PointerResult, errors::OperationStatus};
+use crate::{
+    IndexerServiceFFI,
+    api::{
+        PointerResult,
+        client::{UrlProtocol, addr_to_url},
+    },
+    client::{IndexerClient, IndexerClientTrait as _},
+    errors::OperationStatus,
+};
 
 pub type InitializedIndexerServiceFFIResult = PointerResult<IndexerServiceFFI, OperationStatus>;
 
@@ -67,7 +75,13 @@ fn setup_indexer(
             OperationStatus::InitializationError
         })?;
 
-    Ok(IndexerServiceFFI::new(indexer_handle, rt))
+    let indexer_url = addr_to_url(UrlProtocol::Ws, indexer_handle.addr())?;
+    let indexer_client = rt.block_on(IndexerClient::new(&indexer_url)).map_err(|e| {
+        log::error!("Could not start indexer client: {e}");
+        OperationStatus::InitializationError
+    })?;
+
+    Ok(IndexerServiceFFI::new(indexer_handle, rt, indexer_client))
 }
 
 /// Stops and frees the resources associated with the given indexer service.
diff --git a/indexer_ffi/src/api/memory.rs b/indexer/ffi/src/api/memory.rs
similarity index 100%
rename from indexer_ffi/src/api/memory.rs
rename to indexer/ffi/src/api/memory.rs
diff --git a/indexer_ffi/src/api/mod.rs b/indexer/ffi/src/api/mod.rs
similarity index 64%
rename from indexer_ffi/src/api/mod.rs
rename to indexer/ffi/src/api/mod.rs
index e84a3913..ea2b91d7 100644
--- a/indexer_ffi/src/api/mod.rs
+++ b/indexer/ffi/src/api/mod.rs
@@ -1,5 +1,8 @@
 pub use result::PointerResult;
 
+pub mod client;
 pub mod lifecycle;
 pub mod memory;
+pub mod query;
 pub mod result;
+pub mod types;
diff --git a/indexer/ffi/src/api/query.rs b/indexer/ffi/src/api/query.rs
new file mode 100644
index 00000000..1e39d961
--- /dev/null
+++ b/indexer/ffi/src/api/query.rs
@@ -0,0 +1,334 @@
+use indexer_service_protocol::{AccountId, HashType};
+use indexer_service_rpc::RpcClient as _;
+
+use crate::{
+    IndexerServiceFFI,
+    api::{
+        PointerResult,
+        types::{
+            FfiAccountId, FfiBlockId, FfiHashType, FfiOption, FfiVec,
+            account::FfiAccount,
+            block::{FfiBlock, FfiBlockOpt},
+            transaction::FfiTransaction,
+        },
+    },
+    errors::OperationStatus,
+};
+
+/// Query the last block id from indexer.
+///
+/// # Arguments
+///
+/// - `indexer`: A pointer to the `IndexerServiceFFI` instance to be queried.
+///
+/// # Returns
+///
+/// A `PointerResult<u64, OperationStatus>` indicating success or failure.
+///
+/// # Safety
+///
+/// The caller must ensure that:
+/// - `indexer` is a valid pointer to a `IndexerServiceFFI` instance
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn query_last_block(
+    indexer: *const IndexerServiceFFI,
+) -> PointerResult<u64, OperationStatus> {
+    if indexer.is_null() {
+        log::error!("Attempted to query a null indexer pointer. This is a bug. Aborting.");
+        return PointerResult::from_error(OperationStatus::NullPointer);
+    }
+
+    let indexer = unsafe { &*indexer };
+
+    let client = unsafe { indexer.client() };
+    let runtime = unsafe { indexer.runtime() };
+
+    runtime
+        .block_on(client.get_last_finalized_block_id())
+        .map_or_else(
+            |_| PointerResult::from_error(OperationStatus::ClientError),
+            PointerResult::from_value,
+        )
+}
+
+/// Query the block by id from indexer.
+///
+/// # Arguments
+///
+/// - `indexer`: A pointer to the `IndexerServiceFFI` instance to be queried.
+/// - `block_id`: `u64` number of block id
+///
+/// # Returns
+///
+/// A `PointerResult<FfiBlockOpt, OperationStatus>` indicating success or failure.
+///
+/// # Safety
+///
+/// The caller must ensure that:
+/// - `indexer` is a valid pointer to a `IndexerServiceFFI` instance
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn query_block(
+    indexer: *const IndexerServiceFFI,
+    block_id: FfiBlockId,
+) -> PointerResult<FfiBlockOpt, OperationStatus> {
+    if indexer.is_null() {
+        log::error!("Attempted to query a null indexer pointer. This is a bug. Aborting.");
+        return PointerResult::from_error(OperationStatus::NullPointer);
+    }
+
+    let indexer = unsafe { &*indexer };
+
+    let client = unsafe { indexer.client() };
+    let runtime = unsafe { indexer.runtime() };
+
+    runtime
+        .block_on(client.get_block_by_id(block_id))
+        .map_or_else(
+            |_| PointerResult::from_error(OperationStatus::ClientError),
+            |block_opt| {
+                let block_ffi = block_opt.map_or_else(FfiBlockOpt::from_none, |block| {
+                    FfiBlockOpt::from_value(block.into())
+                });
+
+                PointerResult::from_value(block_ffi)
+            },
+        )
+}
+
+/// Query the block by id from indexer.
+///
+/// # Arguments
+///
+/// - `indexer`: A pointer to the `IndexerServiceFFI` instance to be queried.
+/// - `hash`: `FfiHashType` - hash of block
+///
+/// # Returns
+///
+/// A `PointerResult<FfiBlockOpt, OperationStatus>` indicating success or failure.
+///
+/// # Safety
+///
+/// The caller must ensure that:
+/// - `indexer` is a valid pointer to a `IndexerServiceFFI` instance
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn query_block_by_hash(
+    indexer: *const IndexerServiceFFI,
+    hash: FfiHashType,
+) -> PointerResult<FfiBlockOpt, OperationStatus> {
+    if indexer.is_null() {
+        log::error!("Attempted to query a null indexer pointer. This is a bug. Aborting.");
+        return PointerResult::from_error(OperationStatus::NullPointer);
+    }
+
+    let indexer = unsafe { &*indexer };
+
+    let client = unsafe { indexer.client() };
+    let runtime = unsafe { indexer.runtime() };
+
+    runtime
+        .block_on(client.get_block_by_hash(HashType(hash.data)))
+        .map_or_else(
+            |_| PointerResult::from_error(OperationStatus::ClientError),
+            |block_opt| {
+                let block_ffi = block_opt.map_or_else(FfiBlockOpt::from_none, |block| {
+                    FfiBlockOpt::from_value(block.into())
+                });
+
+                PointerResult::from_value(block_ffi)
+            },
+        )
+}
+
+/// Query the account by id from indexer.
+///
+/// # Arguments
+///
+/// - `indexer`: A pointer to the `IndexerServiceFFI` instance to be queried.
+/// - `account_id`: `FfiAccountId` - id of queried account
+///
+/// # Returns
+///
+/// A `PointerResult<FfiAccount, OperationStatus>` indicating success or failure.
+///
+/// # Safety
+///
+/// The caller must ensure that:
+/// - `indexer` is a valid pointer to a `IndexerServiceFFI` instance
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn query_account(
+    indexer: *const IndexerServiceFFI,
+    account_id: FfiAccountId,
+) -> PointerResult<FfiAccount, OperationStatus> {
+    if indexer.is_null() {
+        log::error!("Attempted to query a null indexer pointer. This is a bug. Aborting.");
+        return PointerResult::from_error(OperationStatus::NullPointer);
+    }
+
+    let indexer = unsafe { &*indexer };
+
+    let client = unsafe { indexer.client() };
+    let runtime = unsafe { indexer.runtime() };
+
+    runtime
+        .block_on(client.get_account(AccountId {
+            value: account_id.data,
+        }))
+        .map_or_else(
+            |_| PointerResult::from_error(OperationStatus::ClientError),
+            |acc| {
+                let acc_nssa: nssa::Account =
+                    acc.try_into().expect("Source is in blocks, must fit");
+                PointerResult::from_value(acc_nssa.into())
+            },
+        )
+}
+
+/// Query the trasnaction by hash from indexer.
+///
+/// # Arguments
+///
+/// - `indexer`: A pointer to the `IndexerServiceFFI` instance to be queried.
+/// - `hash`: `FfiHashType` - hash of transaction
+///
+/// # Returns
+///
+/// A `PointerResult<FfiOption<FfiTransaction>, OperationStatus>` indicating success or failure.
+///
+/// # Safety
+///
+/// The caller must ensure that:
+/// - `indexer` is a valid pointer to a `IndexerServiceFFI` instance
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn query_transaction(
+    indexer: *const IndexerServiceFFI,
+    hash: FfiHashType,
+) -> PointerResult<FfiOption<FfiTransaction>, OperationStatus> {
+    if indexer.is_null() {
+        log::error!("Attempted to query a null indexer pointer. This is a bug. Aborting.");
+        return PointerResult::from_error(OperationStatus::NullPointer);
+    }
+
+    let indexer = unsafe { &*indexer };
+
+    let client = unsafe { indexer.client() };
+    let runtime = unsafe { indexer.runtime() };
+
+    runtime
+        .block_on(client.get_transaction(HashType(hash.data)))
+        .map_or_else(
+            |_| PointerResult::from_error(OperationStatus::ClientError),
+            |tx_opt| {
+                let tx_ffi = tx_opt.map_or_else(FfiOption::<FfiTransaction>::from_none, |tx| {
+                    FfiOption::<FfiTransaction>::from_value(tx.into())
+                });
+
+                PointerResult::from_value(tx_ffi)
+            },
+        )
+}
+
+/// Query the blocks by block range from indexer.
+///
+/// # Arguments
+///
+/// - `indexer`: A pointer to the `IndexerServiceFFI` instance to be queried.
+/// - `before`: `FfiOption<u64>` - end block of query
+/// - `limit`: `u64` - number of blocks to query before `before`
+///
+/// # Returns
+///
+/// A `PointerResult<FfiVec<FfiBlock>, OperationStatus>` indicating success or failure.
+///
+/// # Safety
+///
+/// The caller must ensure that:
+/// - `indexer` is a valid pointer to a `IndexerServiceFFI` instance
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn query_block_vec(
+    indexer: *const IndexerServiceFFI,
+    before: FfiOption<u64>,
+    limit: u64,
+) -> PointerResult<FfiVec<FfiBlock>, OperationStatus> {
+    if indexer.is_null() {
+        log::error!("Attempted to query a null indexer pointer. This is a bug. Aborting.");
+        return PointerResult::from_error(OperationStatus::NullPointer);
+    }
+
+    let indexer = unsafe { &*indexer };
+
+    let client = unsafe { indexer.client() };
+    let runtime = unsafe { indexer.runtime() };
+
+    let before_std = before.is_some.then(|| unsafe { *before.value });
+
+    runtime
+        .block_on(client.get_blocks(before_std, limit))
+        .map_or_else(
+            |_| PointerResult::from_error(OperationStatus::ClientError),
+            |block_vec| {
+                PointerResult::from_value(
+                    block_vec
+                        .into_iter()
+                        .map(Into::into)
+                        .collect::<Vec<_>>()
+                        .into(),
+                )
+            },
+        )
+}
+
+/// Query the transactions range by account id from indexer.
+///
+/// # Arguments
+///
+/// - `indexer`: A pointer to the `IndexerServiceFFI` instance to be queried.
+/// - `account_id`: `FfiAccountId` - id of queried account
+/// - `offset`: `u64` - first tx id of query
+/// - `limit`: `u64` - number of tx ids to query after `offset`
+///
+/// # Returns
+///
+/// A `PointerResult<FfiVec<FfiBlock>, OperationStatus>` indicating success or failure.
+///
+/// # Safety
+///
+/// The caller must ensure that:
+/// - `indexer` is a valid pointer to a `IndexerServiceFFI` instance
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn query_transactions_by_account(
+    indexer: *const IndexerServiceFFI,
+    account_id: FfiAccountId,
+    offset: u64,
+    limit: u64,
+) -> PointerResult<FfiVec<FfiTransaction>, OperationStatus> {
+    if indexer.is_null() {
+        log::error!("Attempted to query a null indexer pointer. This is a bug. Aborting.");
+        return PointerResult::from_error(OperationStatus::NullPointer);
+    }
+
+    let indexer = unsafe { &*indexer };
+
+    let client = unsafe { indexer.client() };
+    let runtime = unsafe { indexer.runtime() };
+
+    runtime
+        .block_on(client.get_transactions_by_account(
+            AccountId {
+                value: account_id.data,
+            },
+            offset,
+            limit,
+        ))
+        .map_or_else(
+            |_| PointerResult::from_error(OperationStatus::ClientError),
+            |tx_vec| {
+                PointerResult::from_value(
+                    tx_vec
+                        .into_iter()
+                        .map(Into::into)
+                        .collect::<Vec<_>>()
+                        .into(),
+                )
+            },
+        )
+}
diff --git a/indexer_ffi/src/api/result.rs b/indexer/ffi/src/api/result.rs
similarity index 100%
rename from indexer_ffi/src/api/result.rs
rename to indexer/ffi/src/api/result.rs
diff --git a/indexer/ffi/src/api/types/account.rs b/indexer/ffi/src/api/types/account.rs
new file mode 100644
index 00000000..6c35347f
--- /dev/null
+++ b/indexer/ffi/src/api/types/account.rs
@@ -0,0 +1,119 @@
+use indexer_service_protocol::ProgramId;
+
+use crate::api::types::{FfiBytes32, FfiProgramId, FfiU128};
+
+/// Account data structure - C-compatible version of nssa Account.
+///
+/// Note: `balance` and `nonce` are u128 values represented as little-endian
+/// byte arrays since C doesn't have native u128 support.
+#[repr(C)]
+pub struct FfiAccount {
+    pub program_owner: FfiProgramId,
+    /// Balance as little-endian [u8; 16].
+    pub balance: FfiU128,
+    /// Pointer to account data bytes.
+    pub data: *mut u8,
+    /// Length of account data.
+    pub data_len: usize,
+    /// Capacity of account data.
+    pub data_cap: usize,
+    /// Nonce as little-endian [u8; 16].
+    pub nonce: FfiU128,
+}
+
+// Helper functions to convert between Rust and FFI types
+
+impl From<&nssa::AccountId> for FfiBytes32 {
+    fn from(id: &nssa::AccountId) -> Self {
+        Self::from_account_id(id)
+    }
+}
+
+impl From<nssa::Account> for FfiAccount {
+    fn from(value: nssa::Account) -> Self {
+        let nssa::Account {
+            program_owner,
+            balance,
+            data,
+            nonce,
+        } = value;
+
+        let (data, data_len, data_cap) = data.into_inner().into_raw_parts();
+
+        let program_owner = FfiProgramId {
+            data: program_owner,
+        };
+        Self {
+            program_owner,
+            balance: balance.into(),
+            data,
+            data_len,
+            data_cap,
+            nonce: nonce.0.into(),
+        }
+    }
+}
+
+impl From<FfiAccount> for indexer_service_protocol::Account {
+    fn from(value: FfiAccount) -> Self {
+        let FfiAccount {
+            program_owner,
+            balance,
+            data,
+            data_cap,
+            data_len,
+            nonce,
+        } = value;
+
+        Self {
+            program_owner: ProgramId(program_owner.data),
+            balance: balance.into(),
+            data: indexer_service_protocol::Data(unsafe {
+                Vec::from_raw_parts(data, data_len, data_cap)
+            }),
+            nonce: nonce.into(),
+        }
+    }
+}
+
+impl From<&FfiAccount> for indexer_service_protocol::Account {
+    fn from(value: &FfiAccount) -> Self {
+        let &FfiAccount {
+            program_owner,
+            balance,
+            data,
+            data_cap,
+            data_len,
+            nonce,
+        } = value;
+
+        Self {
+            program_owner: ProgramId(program_owner.data),
+            balance: balance.into(),
+            data: indexer_service_protocol::Data(unsafe {
+                Vec::from_raw_parts(data, data_len, data_cap)
+            }),
+            nonce: nonce.into(),
+        }
+    }
+}
+
+/// Frees the resources associated with the given ffi account.
+///
+/// # Arguments
+///
+/// - `val`: An instance of `FfiAccount`.
+///
+/// # Returns
+///
+/// void.
+///
+/// # Safety
+///
+/// The caller must ensure that:
+/// - `val` is a valid instance of `FfiAccount`.
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn free_ffi_account(val: FfiAccount) {
+    let orig_val: indexer_service_protocol::Account = val.into();
+    drop(orig_val);
+}
diff --git a/indexer/ffi/src/api/types/block.rs b/indexer/ffi/src/api/types/block.rs
new file mode 100644
index 00000000..bca2fdb5
--- /dev/null
+++ b/indexer/ffi/src/api/types/block.rs
@@ -0,0 +1,199 @@
+use indexer_service_protocol::{
+    BedrockStatus, Block, BlockHeader, HashType, MantleMsgId, Signature,
+};
+
+use crate::api::types::{
+    FfiBlockId, FfiHashType, FfiMsgId, FfiOption, FfiSignature, FfiTimestamp, FfiVec,
+    transaction::free_ffi_transaction_vec, vectors::FfiBlockBody,
+};
+
+#[repr(C)]
+pub struct FfiBlock {
+    pub header: FfiBlockHeader,
+    pub body: FfiBlockBody,
+    pub bedrock_status: FfiBedrockStatus,
+    pub bedrock_parent_id: FfiMsgId,
+}
+
+impl From<Block> for FfiBlock {
+    fn from(value: Block) -> Self {
+        let Block {
+            header,
+            body,
+            bedrock_status,
+            bedrock_parent_id,
+        } = value;
+
+        Self {
+            header: header.into(),
+            body: body
+                .transactions
+                .into_iter()
+                .map(Into::into)
+                .collect::<Vec<_>>()
+                .into(),
+            bedrock_status: bedrock_status.into(),
+            bedrock_parent_id: bedrock_parent_id.into(),
+        }
+    }
+}
+
+pub type FfiBlockOpt = FfiOption<FfiBlock>;
+
+#[repr(C)]
+pub struct FfiBlockHeader {
+    pub block_id: FfiBlockId,
+    pub prev_block_hash: FfiHashType,
+    pub hash: FfiHashType,
+    pub timestamp: FfiTimestamp,
+    pub signature: FfiSignature,
+}
+
+impl From<BlockHeader> for FfiBlockHeader {
+    fn from(value: BlockHeader) -> Self {
+        let BlockHeader {
+            block_id,
+            prev_block_hash,
+            hash,
+            timestamp,
+            signature,
+        } = value;
+
+        Self {
+            block_id,
+            prev_block_hash: prev_block_hash.into(),
+            hash: hash.into(),
+            timestamp,
+            signature: signature.into(),
+        }
+    }
+}
+
+#[repr(C)]
+pub enum FfiBedrockStatus {
+    Pending = 0x0,
+    Safe,
+    Finalized,
+}
+
+impl From<BedrockStatus> for FfiBedrockStatus {
+    fn from(value: BedrockStatus) -> Self {
+        match value {
+            BedrockStatus::Finalized => Self::Finalized,
+            BedrockStatus::Pending => Self::Pending,
+            BedrockStatus::Safe => Self::Safe,
+        }
+    }
+}
+
+impl From<FfiBedrockStatus> for BedrockStatus {
+    fn from(value: FfiBedrockStatus) -> Self {
+        match value {
+            FfiBedrockStatus::Finalized => Self::Finalized,
+            FfiBedrockStatus::Pending => Self::Pending,
+            FfiBedrockStatus::Safe => Self::Safe,
+        }
+    }
+}
+
+/// Frees the resources associated with the given ffi block.
+///
+/// # Arguments
+///
+/// - `val`: An instance of `FfiBlock`.
+///
+/// # Returns
+///
+/// void.
+///
+/// # Safety
+///
+/// The caller must ensure that:
+/// - `val` is a valid instance of `FfiBlock`.
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn free_ffi_block(val: FfiBlock) {
+    // We don't really need all the casts, but just in case
+    // All except `ffi_tx_ffi_vec` is Copy types, so no need for Drop
+    let _ = BlockHeader {
+        block_id: val.header.block_id,
+        prev_block_hash: HashType(val.header.prev_block_hash.data),
+        hash: HashType(val.header.hash.data),
+        timestamp: val.header.timestamp,
+        signature: Signature(val.header.signature.data),
+    };
+    let ffi_tx_ffi_vec = val.body;
+
+    #[expect(clippy::let_underscore_must_use, reason = "No use for this Copy type")]
+    let _: BedrockStatus = val.bedrock_status.into();
+
+    let _ = MantleMsgId(val.bedrock_parent_id.data);
+
+    unsafe {
+        free_ffi_transaction_vec(ffi_tx_ffi_vec);
+    };
+}
+
+/// Frees the resources associated with the given ffi block option.
+///
+/// # Arguments
+///
+/// - `val`: An instance of `FfiBlockOpt`.
+///
+/// # Returns
+///
+/// void.
+///
+/// # Safety
+///
+/// The caller must ensure that:
+/// - `val` is a valid instance of `FfiBlockOpt`.
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn free_ffi_block_opt(val: FfiBlockOpt) {
+    if val.is_some {
+        let value = unsafe { Box::from_raw(val.value) };
+
+        // We don't really need all the casts, but just in case
+        // All except `ffi_tx_ffi_vec` is Copy types, so no need for Drop
+        let _ = BlockHeader {
+            block_id: value.header.block_id,
+            prev_block_hash: HashType(value.header.prev_block_hash.data),
+            hash: HashType(value.header.hash.data),
+            timestamp: value.header.timestamp,
+            signature: Signature(value.header.signature.data),
+        };
+        let ffi_tx_ffi_vec = value.body;
+
+        #[expect(clippy::let_underscore_must_use, reason = "No use for this Copy type")]
+        let _: BedrockStatus = value.bedrock_status.into();
+
+        let _ = MantleMsgId(value.bedrock_parent_id.data);
+
+        unsafe {
+            free_ffi_transaction_vec(ffi_tx_ffi_vec);
+        };
+    }
+}
+
+/// Frees the resources associated with the given ffi block vector.
+///
+/// # Arguments
+///
+/// - `val`: An instance of `FfiVec<FfiBlock>`.
+///
+/// # Returns
+///
+/// void.
+///
+/// # Safety
+///
+/// The caller must ensure that:
+/// - `val` is a valid instance of `FfiVec<FfiBlock>`.
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn free_ffi_block_vec(val: FfiVec<FfiBlock>) {
+    let ffi_block_std_vec: Vec<_> = val.into();
+    for block in ffi_block_std_vec {
+        unsafe {
+            free_ffi_block(block);
+        }
+    }
+}
diff --git a/indexer/ffi/src/api/types/mod.rs b/indexer/ffi/src/api/types/mod.rs
new file mode 100644
index 00000000..2e7a77ad
--- /dev/null
+++ b/indexer/ffi/src/api/types/mod.rs
@@ -0,0 +1,165 @@
+use indexer_service_protocol::{AccountId, HashType, MantleMsgId, ProgramId, PublicKey, Signature};
+
+pub mod account;
+pub mod block;
+pub mod transaction;
+pub mod vectors;
+
+/// 32-byte array type for `AccountId`, keys, hashes, etc.
+#[repr(C)]
+#[derive(Clone, Copy, Default)]
+pub struct FfiBytes32 {
+    pub data: [u8; 32],
+}
+
+/// 64-byte array type for signatures, etc.
+#[repr(C)]
+#[derive(Clone, Copy)]
+pub struct FfiBytes64 {
+    pub data: [u8; 64],
+}
+
+/// Program ID - 8 u32 values (32 bytes total).
+#[repr(C)]
+#[derive(Clone, Copy, Default)]
+pub struct FfiProgramId {
+    pub data: [u32; 8],
+}
+
+impl From<ProgramId> for FfiProgramId {
+    fn from(value: ProgramId) -> Self {
+        Self { data: value.0 }
+    }
+}
+
+/// U128 - 16 bytes little endian.
+#[repr(C)]
+#[derive(Clone, Copy, Default)]
+pub struct FfiU128 {
+    pub data: [u8; 16],
+}
+
+impl FfiBytes32 {
+    /// Create from a 32-byte array.
+    #[must_use]
+    pub const fn from_bytes(bytes: [u8; 32]) -> Self {
+        Self { data: bytes }
+    }
+
+    /// Create from an `AccountId`.
+    #[must_use]
+    pub const fn from_account_id(id: &nssa::AccountId) -> Self {
+        Self { data: *id.value() }
+    }
+}
+
+impl From<u128> for FfiU128 {
+    fn from(value: u128) -> Self {
+        Self {
+            data: value.to_le_bytes(),
+        }
+    }
+}
+
+impl From<FfiU128> for u128 {
+    fn from(value: FfiU128) -> Self {
+        Self::from_le_bytes(value.data)
+    }
+}
+
+pub type FfiHashType = FfiBytes32;
+pub type FfiMsgId = FfiBytes32;
+pub type FfiBlockId = u64;
+pub type FfiTimestamp = u64;
+pub type FfiSignature = FfiBytes64;
+pub type FfiAccountId = FfiBytes32;
+pub type FfiNonce = FfiU128;
+pub type FfiPublicKey = FfiBytes32;
+
+impl From<HashType> for FfiHashType {
+    fn from(value: HashType) -> Self {
+        Self { data: value.0 }
+    }
+}
+
+impl From<MantleMsgId> for FfiMsgId {
+    fn from(value: MantleMsgId) -> Self {
+        Self { data: value.0 }
+    }
+}
+
+impl From<Signature> for FfiSignature {
+    fn from(value: Signature) -> Self {
+        Self { data: value.0 }
+    }
+}
+
+impl From<AccountId> for FfiAccountId {
+    fn from(value: AccountId) -> Self {
+        Self { data: value.value }
+    }
+}
+
+impl From<PublicKey> for FfiPublicKey {
+    fn from(value: PublicKey) -> Self {
+        Self { data: value.0 }
+    }
+}
+
+#[repr(C)]
+pub struct FfiVec<T> {
+    pub entries: *mut T,
+    pub len: usize,
+    pub capacity: usize,
+}
+
+impl<T> From<Vec<T>> for FfiVec<T> {
+    fn from(value: Vec<T>) -> Self {
+        let (entries, len, capacity) = value.into_raw_parts();
+        Self {
+            entries,
+            len,
+            capacity,
+        }
+    }
+}
+
+impl<T> From<FfiVec<T>> for Vec<T> {
+    fn from(value: FfiVec<T>) -> Self {
+        unsafe { Self::from_raw_parts(value.entries, value.len, value.capacity) }
+    }
+}
+
+impl<T> FfiVec<T> {
+    /// # Safety
+    ///
+    /// `index` must be lesser than `self.len`.
+    #[must_use]
+    pub unsafe fn get(&self, index: usize) -> &T {
+        let ptr = unsafe { self.entries.add(index) };
+        unsafe { &*ptr }
+    }
+}
+
+#[repr(C)]
+pub struct FfiOption<T> {
+    pub value: *mut T,
+    pub is_some: bool,
+}
+
+impl<T> FfiOption<T> {
+    pub fn from_value(val: T) -> Self {
+        Self {
+            value: Box::into_raw(Box::new(val)),
+            is_some: true,
+        }
+    }
+
+    #[must_use]
+    pub const fn from_none() -> Self {
+        Self {
+            value: std::ptr::null_mut(),
+            is_some: false,
+        }
+    }
+}
diff --git a/indexer/ffi/src/api/types/transaction.rs b/indexer/ffi/src/api/types/transaction.rs
new file mode 100644
index 00000000..ee3bd01b
--- /dev/null
+++ b/indexer/ffi/src/api/types/transaction.rs
@@ -0,0 +1,548 @@
+use indexer_service_protocol::{
+    AccountId, Ciphertext, Commitment, CommitmentSetDigest, EncryptedAccountData,
+    EphemeralPublicKey, HashType, Nullifier, PrivacyPreservingMessage,
+    PrivacyPreservingTransaction, ProgramDeploymentMessage, ProgramDeploymentTransaction,
+    ProgramId, Proof, PublicKey, PublicMessage, PublicTransaction, Signature, Transaction,
+    ValidityWindow, WitnessSet,
+};
+
+use crate::api::types::{
+    FfiBytes32, FfiHashType, FfiOption, FfiProgramId, FfiPublicKey, FfiSignature, FfiVec,
+    vectors::{
+        FfiAccountIdList, FfiAccountList, FfiEncryptedAccountDataList, FfiInstructionDataList,
+        FfiNonceList, FfiNullifierCommitmentSetList, FfiProgramDeploymentMessage, FfiProof,
+        FfiSignaturePubKeyList, FfiVecBytes32, FfiVecU8,
+    },
+};
+
+#[repr(C)]
+pub struct FfiPublicTransactionBody {
+    pub hash: FfiHashType,
+    pub message: FfiPublicMessage,
+    pub witness_set: FfiSignaturePubKeyList,
+}
+
+impl From<PublicTransaction> for FfiPublicTransactionBody {
+    fn from(value: PublicTransaction) -> Self {
+        let PublicTransaction {
+            hash,
+            message,
+            witness_set,
+        } = value;
+
+        Self {
+            hash: hash.into(),
+            message: message.into(),
+            witness_set: witness_set
+                .signatures_and_public_keys
+                .into_iter()
+                .map(Into::into)
+                .collect::<Vec<_>>()
+                .into(),
+        }
+    }
+}
+
+impl From<Box<FfiPublicTransactionBody>> for PublicTransaction {
+    fn from(value: Box<FfiPublicTransactionBody>) -> Self {
+        Self {
+            hash: HashType(value.hash.data),
+            message: PublicMessage {
+                program_id: ProgramId(value.message.program_id.data),
+                account_ids: {
+                    let std_vec: Vec<_> = value.message.account_ids.into();
+                    std_vec
+                        .into_iter()
+                        .map(|ffi_val| AccountId {
+                            value: ffi_val.data,
+                        })
+                        .collect()
+                },
+                nonces: {
+                    let std_vec: Vec<_> = value.message.nonces.into();
+                    std_vec.into_iter().map(Into::into).collect()
+                },
+                instruction_data: value.message.instruction_data.into(),
+            },
+            witness_set: WitnessSet {
+                signatures_and_public_keys: {
+                    let std_vec: Vec<_> = value.witness_set.into();
+                    std_vec
+                        .into_iter()
+                        .map(|ffi_val| {
+                            (
+                                Signature(ffi_val.signature.data),
+                                PublicKey(ffi_val.public_key.data),
+                            )
+                        })
+                        .collect()
+                },
+                proof: None,
+            },
+        }
+    }
+}
+
+#[repr(C)]
+pub struct FfiPublicMessage {
+    pub program_id: FfiProgramId,
+    pub account_ids: FfiAccountIdList,
+    pub nonces: FfiNonceList,
+    pub instruction_data: FfiInstructionDataList,
+}
+
+impl From<PublicMessage> for FfiPublicMessage {
+    fn from(value: PublicMessage) -> Self {
+        let PublicMessage {
+            program_id,
+            account_ids,
+            nonces,
+            instruction_data,
+        } = value;
+
+        Self {
+            program_id: program_id.into(),
+            account_ids: account_ids
+                .into_iter()
+                .map(Into::into)
+                .collect::<Vec<_>>()
+                .into(),
+            nonces: nonces
+                .into_iter()
+                .map(Into::into)
+                .collect::<Vec<_>>()
+                .into(),
+            instruction_data: instruction_data.into(),
+        }
+    }
+}
+
+#[repr(C)]
+pub struct FfiPrivateTransactionBody {
+    pub hash: FfiHashType,
+    pub message: FfiPrivacyPreservingMessage,
+    pub witness_set: FfiSignaturePubKeyList,
+    pub proof: FfiProof,
+}
+
+impl From<PrivacyPreservingTransaction> for FfiPrivateTransactionBody {
+    fn from(value: PrivacyPreservingTransaction) -> Self {
+        let PrivacyPreservingTransaction {
+            hash,
+            message,
+            witness_set,
+        } = value;
+
+        Self {
+            hash: hash.into(),
+            message: message.into(),
+            witness_set: witness_set
+                .signatures_and_public_keys
+                .into_iter()
+                .map(Into::into)
+                .collect::<Vec<_>>()
+                .into(),
+            proof: witness_set
+                .proof
+                .expect("Private execution: proof must be present")
+                .0
+                .into(),
+        }
+    }
+}
+
+impl From<Box<FfiPrivateTransactionBody>> for PrivacyPreservingTransaction {
+    fn from(value: Box<FfiPrivateTransactionBody>) -> Self {
+        Self {
+            hash: HashType(value.hash.data),
+            message: PrivacyPreservingMessage {
+                public_account_ids: {
+                    let std_vec: Vec<_> = value.message.public_account_ids.into();
+                    std_vec
+                        .into_iter()
+                        .map(|ffi_val| AccountId {
+                            value: ffi_val.data,
+                        })
+                        .collect()
+                },
+                nonces: {
+                    let std_vec: Vec<_> = value.message.nonces.into();
+                    std_vec.into_iter().map(Into::into).collect()
+                },
+                public_post_states: {
+                    let std_vec: Vec<_> = value.message.public_post_states.into();
+                    std_vec.into_iter().map(Into::into).collect()
+                },
+                encrypted_private_post_states: {
+                    let std_vec: Vec<_> = value.message.encrypted_private_post_states.into();
+                    std_vec
+                        .into_iter()
+                        .map(|ffi_val| EncryptedAccountData {
+                            ciphertext: Ciphertext(ffi_val.ciphertext.into()),
+                            epk: EphemeralPublicKey(ffi_val.epk.into()),
+                            view_tag: ffi_val.view_tag,
+                        })
+                        .collect()
+                },
+                new_commitments: {
+                    let std_vec: Vec<_> = value.message.new_commitments.into();
+                    std_vec
+                        .into_iter()
+                        .map(|ffi_val| Commitment(ffi_val.data))
+                        .collect()
+                },
+                new_nullifiers: {
+                    let std_vec: Vec<_> = value.message.new_nullifiers.into();
+                    std_vec
+                        .into_iter()
+                        .map(|ffi_val| {
+                            (
+                                Nullifier(ffi_val.nullifier.data),
+                                CommitmentSetDigest(ffi_val.commitment_set_digest.data),
+                            )
+                        })
+                        .collect()
+                },
+                block_validity_window: cast_ffi_validity_window(
+                    value.message.block_validity_window,
+                ),
+                timestamp_validity_window: cast_ffi_validity_window(
+                    value.message.timestamp_validity_window,
+                ),
+            },
+            witness_set: WitnessSet {
+                signatures_and_public_keys: {
+                    let std_vec: Vec<_> = value.witness_set.into();
+                    std_vec
+                        .into_iter()
+                        .map(|ffi_val| {
+                            (
+                                Signature(ffi_val.signature.data),
+                                PublicKey(ffi_val.public_key.data),
+                            )
+                        })
+                        .collect()
+                },
+                proof: Some(Proof(value.proof.into())),
+            },
+        }
+    }
+}
+
+#[repr(C)]
+pub struct FfiPrivacyPreservingMessage {
+    pub public_account_ids: FfiAccountIdList,
+    pub nonces: FfiNonceList,
+    pub public_post_states: FfiAccountList,
+    pub encrypted_private_post_states: FfiEncryptedAccountDataList,
+    pub new_commitments: FfiVecBytes32,
+    pub new_nullifiers: FfiNullifierCommitmentSetList,
+    pub block_validity_window: [u64; 2],
+    pub timestamp_validity_window: [u64; 2],
+}
+
+impl From<PrivacyPreservingMessage> for FfiPrivacyPreservingMessage {
+    fn from(value: PrivacyPreservingMessage) -> Self {
+        let PrivacyPreservingMessage {
+            public_account_ids,
+            nonces,
+            public_post_states,
+            encrypted_private_post_states,
+            new_commitments,
+            new_nullifiers,
+            block_validity_window,
+            timestamp_validity_window,
+        } = value;
+
+        Self {
+            public_account_ids: public_account_ids
+                .into_iter()
+                .map(Into::into)
+                .collect::<Vec<_>>()
+                .into(),
+            nonces: nonces
+                .into_iter()
+                .map(Into::into)
+                .collect::<Vec<_>>()
+                .into(),
+            public_post_states: public_post_states
+                .into_iter()
+                .map(|acc_ind| -> nssa::Account {
+                    acc_ind.try_into().expect("Source is in blocks, must fit")
+                })
+                .map(Into::into)
+                .collect::<Vec<_>>()
+                .into(),
+            encrypted_private_post_states: encrypted_private_post_states
+                .into_iter()
+                .map(Into::into)
+                .collect::<Vec<_>>()
+                .into(),
+            new_commitments: new_commitments
+                .into_iter()
+                .map(|comm| FfiBytes32 { data: comm.0 })
+                .collect::<Vec<_>>()
+                .into(),
+            new_nullifiers: new_nullifiers
+                .into_iter()
+                .map(Into::into)
+                .collect::<Vec<_>>()
+                .into(),
+            block_validity_window: cast_validity_window(block_validity_window),
+            timestamp_validity_window: cast_validity_window(timestamp_validity_window),
+        }
+    }
+}
+
+#[repr(C)]
+pub struct FfiNullifierCommitmentSet {
+    pub nullifier: FfiBytes32,
+    pub commitment_set_digest: FfiBytes32,
+}
+
+impl From<(Nullifier, CommitmentSetDigest)> for FfiNullifierCommitmentSet {
+    fn from(value: (Nullifier, CommitmentSetDigest)) -> Self {
+        Self {
+            nullifier: FfiBytes32 { data: value.0.0 },
+            commitment_set_digest: FfiBytes32 { data: value.1.0 },
+        }
+    }
+}
+
+#[repr(C)]
+pub struct FfiEncryptedAccountData {
+    pub ciphertext: FfiVecU8,
+    pub epk: FfiVecU8,
+    pub view_tag: u8,
+}
+
+impl From<EncryptedAccountData> for FfiEncryptedAccountData {
+    fn from(value: EncryptedAccountData) -> Self {
+        let EncryptedAccountData {
+            ciphertext,
+            epk,
+            view_tag,
+        } = value;
+
+        Self {
+            ciphertext: ciphertext.0.into(),
+            epk: epk.0.into(),
+            view_tag,
+        }
+    }
+}
+
+#[repr(C)]
+pub struct FfiSignaturePubKeyEntry {
+    pub signature: FfiSignature,
+    pub public_key: FfiPublicKey,
+}
+
+impl From<(Signature, PublicKey)> for FfiSignaturePubKeyEntry {
+    fn from(value: (Signature, PublicKey)) -> Self {
+        Self {
+            signature: value.0.into(),
+            public_key: value.1.into(),
+        }
+    }
+}
+
+#[repr(C)]
+pub struct FfiProgramDeploymentTransactionBody {
+    pub hash: FfiHashType,
+    pub message: FfiProgramDeploymentMessage,
+}
+
+impl From<Box<FfiProgramDeploymentTransactionBody>> for ProgramDeploymentTransaction {
+    fn from(value: Box<FfiProgramDeploymentTransactionBody>) -> Self {
+        Self {
+            hash: HashType(value.hash.data),
+            message: ProgramDeploymentMessage {
+                bytecode: value.message.into(),
+            },
+        }
+    }
+}
+
+impl From<ProgramDeploymentTransaction> for FfiProgramDeploymentTransactionBody {
+    fn from(value: ProgramDeploymentTransaction) -> Self {
+        let ProgramDeploymentTransaction { hash, message } = value;
+
+        Self {
+            hash: hash.into(),
+            message: message.bytecode.into(),
+        }
+    }
+}
+
+#[repr(C)]
+pub struct FfiTransactionBody {
+    pub public_body: *mut FfiPublicTransactionBody,
+    pub private_body: *mut FfiPrivateTransactionBody,
+    pub program_deployment_body: *mut FfiProgramDeploymentTransactionBody,
+}
+
+#[repr(C)]
+pub struct FfiTransaction {
+    pub body: FfiTransactionBody,
+    pub kind: FfiTransactionKind,
+}
+
+impl From<Transaction> for FfiTransaction {
+    fn from(value: Transaction) -> Self {
+        match value {
+            Transaction::Public(pub_tx) => Self {
+                body: FfiTransactionBody {
+                    public_body: Box::into_raw(Box::new(pub_tx.into())),
+                    private_body: std::ptr::null_mut(),
+                    program_deployment_body: std::ptr::null_mut(),
+                },
+                kind: FfiTransactionKind::Public,
+            },
+            Transaction::PrivacyPreserving(priv_tx) => Self {
+                body: FfiTransactionBody {
+                    public_body: std::ptr::null_mut(),
+                    private_body: Box::into_raw(Box::new(priv_tx.into())),
+                    program_deployment_body: std::ptr::null_mut(),
+                },
+                kind: FfiTransactionKind::Private,
+            },
+            Transaction::ProgramDeployment(pr_dep_tx) => Self {
+                body: FfiTransactionBody {
+                    public_body: std::ptr::null_mut(),
+                    private_body: std::ptr::null_mut(),
+                    program_deployment_body: Box::into_raw(Box::new(pr_dep_tx.into())),
+                },
+                kind: FfiTransactionKind::ProgramDeploy,
+            },
+        }
+    }
+}
+
+#[repr(C)]
+pub enum FfiTransactionKind {
+    Public = 0x0,
+    Private,
+    ProgramDeploy,
+}
+
+/// Frees the resources associated with the given ffi transaction.
+///
+/// # Arguments
+///
+/// - `val`: An instance of `FfiTransaction`.
+///
+/// # Returns
+///
+/// void.
+///
+/// # Safety
+///
+/// The caller must ensure that:
+/// - `val` is a valid instance of `FfiTransaction`.
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn free_ffi_transaction(val: FfiTransaction) {
+    match val.kind {
+        FfiTransactionKind::Public => {
+            let body = unsafe { Box::from_raw(val.body.public_body) };
+            let std_body: PublicTransaction = body.into();
+            drop(std_body);
+        }
+        FfiTransactionKind::Private => {
+            let body = unsafe { Box::from_raw(val.body.private_body) };
+            let std_body: PrivacyPreservingTransaction = body.into();
+            drop(std_body);
+        }
+        FfiTransactionKind::ProgramDeploy => {
+            let body = unsafe { Box::from_raw(val.body.program_deployment_body) };
+            let std_body: ProgramDeploymentTransaction = body.into();
+            drop(std_body);
+        }
+    }
+}
+
+/// Frees the resources associated with the given ffi transaction option.
+///
+/// # Arguments
+///
+/// - `val`: An instance of `FfiOption<FfiTransaction>`.
+///
+/// # Returns
+///
+/// void.
+///
+/// # Safety
+///
+/// The caller must ensure that:
+/// - `val` is a valid instance of `FfiOption<FfiTransaction>`.
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn free_ffi_transaction_opt(val: FfiOption<FfiTransaction>) {
+    if val.is_some {
+        let value = unsafe { Box::from_raw(val.value) };
+
+        match value.kind {
+            FfiTransactionKind::Public => {
+                let body = unsafe { Box::from_raw(value.body.public_body) };
+                let std_body: PublicTransaction = body.into();
+                drop(std_body);
+            }
+            FfiTransactionKind::Private => {
+                let body = unsafe { Box::from_raw(value.body.private_body) };
+                let std_body: PrivacyPreservingTransaction = body.into();
+                drop(std_body);
+            }
+            FfiTransactionKind::ProgramDeploy => {
+                let body = unsafe { Box::from_raw(value.body.program_deployment_body) };
+                let std_body: ProgramDeploymentTransaction = body.into();
+                drop(std_body);
+            }
+        }
+    }
+}
+
+/// Frees the resources associated with the given vector of ffi transactions.
+///
+/// # Arguments
+///
+/// - `val`: An instance of `FfiVec<FfiTransaction>`.
+///
+/// # Returns
+///
+/// void.
+///
+/// # Safety
+///
+/// The caller must ensure that:
+/// - `val` is a valid instance of `FfiVec<FfiTransaction>`.
+#[unsafe(no_mangle)]
+pub unsafe extern "C" fn free_ffi_transaction_vec(val: FfiVec<FfiTransaction>) {
+    let ffi_tx_std_vec: Vec<_> = val.into();
+    for tx in ffi_tx_std_vec {
+        unsafe {
+            free_ffi_transaction(tx);
+        }
+    }
+}
+
+fn cast_validity_window(window: ValidityWindow) -> [u64; 2] {
+    [
+        window.0.0.unwrap_or_default(),
+        window.0.1.unwrap_or(u64::MAX),
+    ]
+}
+
+const fn cast_ffi_validity_window(ffi_window: [u64; 2]) -> ValidityWindow {
+    let left = if ffi_window[0] == 0 {
+        None
+    } else {
+        Some(ffi_window[0])
+    };
+
+    let right = if ffi_window[1] == u64::MAX {
+        None
+    } else {
+        Some(ffi_window[1])
+    };
+
+    ValidityWindow((left, right))
+}
diff --git a/indexer/ffi/src/api/types/vectors.rs b/indexer/ffi/src/api/types/vectors.rs
new file mode 100644
index 00000000..46f08737
--- /dev/null
+++ b/indexer/ffi/src/api/types/vectors.rs
@@ -0,0 +1,31 @@
+use crate::api::types::{
+    FfiAccountId, FfiBytes32, FfiNonce, FfiVec,
+    account::FfiAccount,
+    transaction::{
+        FfiEncryptedAccountData, FfiNullifierCommitmentSet, FfiSignaturePubKeyEntry, FfiTransaction,
+    },
+};
+
+pub type FfiVecU8 = FfiVec<u8>;
+
+pub type FfiAccountList = FfiVec<FfiAccount>;
+
+pub type FfiAccountIdList = FfiVec<FfiAccountId>;
+
+pub type FfiVecBytes32 = FfiVec<FfiBytes32>;
+
+pub type FfiBlockBody = FfiVec<FfiTransaction>;
+
+pub type FfiNonceList = FfiVec<FfiNonce>;
+
+pub type FfiInstructionDataList = FfiVec<u32>;
+
+pub type FfiSignaturePubKeyList = FfiVec<FfiSignaturePubKeyEntry>;
+
+pub type FfiProof = FfiVecU8;
+
+pub type FfiProgramDeploymentMessage = FfiVecU8;
+
+pub type FfiEncryptedAccountDataList = FfiVec<FfiEncryptedAccountData>;
+
+pub type FfiNullifierCommitmentSetList = FfiVec<FfiNullifierCommitmentSet>;
diff --git a/sequencer/core/src/indexer_client.rs b/indexer/ffi/src/client.rs
similarity index 91%
rename from sequencer/core/src/indexer_client.rs
rename to indexer/ffi/src/client.rs
index 960b77a4..f05b350e 100644
--- a/sequencer/core/src/indexer_client.rs
+++ b/indexer/ffi/src/client.rs
@@ -4,7 +4,6 @@ use anyhow::{Context as _, Result};
 use log::info;
 pub use url::Url;
 
-#[expect(async_fn_in_trait, reason = "We don't care about Send/Sync here")]
 pub trait IndexerClientTrait: Clone {
     async fn new(indexer_url: &Url) -> Result<Self>;
 }
diff --git a/indexer_ffi/src/errors.rs b/indexer/ffi/src/errors.rs
similarity index 94%
rename from indexer_ffi/src/errors.rs
rename to indexer/ffi/src/errors.rs
index 46aa0f9f..4572474c 100644
--- a/indexer_ffi/src/errors.rs
+++ b/indexer/ffi/src/errors.rs
@@ -5,6 +5,7 @@ pub enum OperationStatus {
     Ok = 0x0,
     NullPointer = 0x1,
     InitializationError = 0x2,
+    ClientError = 0x3,
 }
 
 impl OperationStatus {
diff --git a/indexer_ffi/src/indexer.rs b/indexer/ffi/src/indexer.rs
similarity index 59%
rename from indexer_ffi/src/indexer.rs
rename to indexer/ffi/src/indexer.rs
index c110b183..33800356 100644
--- a/indexer_ffi/src/indexer.rs
+++ b/indexer/ffi/src/indexer.rs
@@ -3,18 +3,26 @@ use std::{ffi::c_void, net::SocketAddr};
 use indexer_service::IndexerHandle;
 use tokio::runtime::Runtime;
 
+use crate::client::IndexerClient;
+
 #[repr(C)]
 pub struct IndexerServiceFFI {
     indexer_handle: *mut c_void,
     runtime: *mut c_void,
+    indexer_client: *mut c_void,
 }
 
 impl IndexerServiceFFI {
-    pub fn new(indexer_handle: indexer_service::IndexerHandle, runtime: Runtime) -> Self {
+    pub fn new(
+        indexer_handle: indexer_service::IndexerHandle,
+        runtime: Runtime,
+        indexer_client: IndexerClient,
+    ) -> Self {
         Self {
             // Box the complex types and convert to opaque pointers
             indexer_handle: Box::into_raw(Box::new(indexer_handle)).cast::<c_void>(),
             runtime: Box::into_raw(Box::new(runtime)).cast::<c_void>(),
+            indexer_client: Box::into_raw(Box::new(indexer_client)).cast::<c_void>(),
         }
     }
 
@@ -25,10 +33,11 @@ impl IndexerServiceFFI {
     /// The caller must ensure that:
     /// - `self` is a valid object(contains valid pointers in all fields)
     #[must_use]
-    pub unsafe fn into_parts(self) -> (Box<IndexerHandle>, Box<Runtime>) {
+    pub unsafe fn into_parts(self) -> (Box<IndexerHandle>, Box<Runtime>, Box<IndexerClient>) {
         let indexer_handle = unsafe { Box::from_raw(self.indexer_handle.cast::<IndexerHandle>()) };
         let runtime = unsafe { Box::from_raw(self.runtime.cast::<Runtime>()) };
-        (indexer_handle, runtime)
+        let indexer_client = unsafe { Box::from_raw(self.indexer_client.cast::<IndexerClient>()) };
+        (indexer_handle, runtime, indexer_client)
     }
 
     /// Helper to get indexer handle addr.
@@ -49,7 +58,7 @@ impl IndexerServiceFFI {
         indexer_handle.addr()
     }
 
-    /// Helper to get indexer handle addr.
+    /// Helper to get indexer handle ref.
     ///
     /// # Safety
     ///
@@ -64,6 +73,38 @@ impl IndexerServiceFFI {
                 .expect("Indexer Handle must be non-null pointer")
         }
     }
+
+    /// Helper to get indexer client ref.
+    ///
+    /// # Safety
+    ///
+    /// The caller must ensure that:
+    /// - `self` is a valid object(contains valid pointers in all fields)
+    #[must_use]
+    pub const unsafe fn client(&self) -> &IndexerClient {
+        unsafe {
+            self.indexer_client
+                .cast::<IndexerClient>()
+                .as_ref()
+                .expect("Indexer Client must be non-null pointer")
+        }
+    }
+
+    /// Helper to get indexer runtime ref.
+    ///
+    /// # Safety
+    ///
+    /// The caller must ensure that:
+    /// - `self` is a valid object(contains valid pointers in all fields)
+    #[must_use]
+    pub const unsafe fn runtime(&self) -> &Runtime {
+        unsafe {
+            self.runtime
+                .cast::<Runtime>()
+                .as_ref()
+                .expect("Indexer Runtime must be non-null pointer")
+        }
+    }
 }
 
 // Implement Drop to prevent memory leaks
@@ -72,6 +113,7 @@ impl Drop for IndexerServiceFFI {
         let Self {
             indexer_handle,
             runtime,
+            indexer_client,
         } = self;
 
         if indexer_handle.is_null() {
@@ -80,7 +122,11 @@ impl Drop for IndexerServiceFFI {
         if runtime.is_null() {
             log::error!("Attempted to drop a null tokio runtime pointer. This is a bug");
         }
+        if indexer_client.is_null() {
+            log::error!("Attempted to drop a null client pointer. This is a bug");
+        }
         drop(unsafe { Box::from_raw(indexer_handle.cast::<IndexerHandle>()) });
         drop(unsafe { Box::from_raw(runtime.cast::<Runtime>()) });
+        drop(unsafe { Box::from_raw(indexer_client.cast::<IndexerClient>()) });
     }
 }
diff --git a/indexer_ffi/src/lib.rs b/indexer/ffi/src/lib.rs
similarity index 93%
rename from indexer_ffi/src/lib.rs
rename to indexer/ffi/src/lib.rs
index fe594ec0..5806a074 100644
--- a/indexer_ffi/src/lib.rs
+++ b/indexer/ffi/src/lib.rs
@@ -4,5 +4,6 @@ pub use errors::OperationStatus;
 pub use indexer::IndexerServiceFFI;
 
 pub mod api;
+mod client;
 mod errors;
 mod indexer;
diff --git a/indexer/service/configs/indexer_config.json b/indexer/service/configs/indexer_config.json
index e4dd8f93..558a3bfe 100644
--- a/indexer/service/configs/indexer_config.json
+++ b/indexer/service/configs/indexer_config.json
@@ -1,12 +1,8 @@
 {
     "home": ".",
     "consensus_info_polling_interval": "1s",
-    "bedrock_client_config": {
-        "addr": "http://localhost:8080",
-        "backoff": {
-            "start_delay": "100ms",
-            "max_retries": 5
-        }
+    "bedrock_config": {
+        "addr": "http://localhost:8080"
     },
     "channel_id": "0101010101010101010101010101010101010101010101010101010101010101",
     "initial_accounts": [
diff --git a/indexer/service/rpc/src/lib.rs b/indexer/service/rpc/src/lib.rs
index 217c60d4..a6476ebd 100644
--- a/indexer/service/rpc/src/lib.rs
+++ b/indexer/service/rpc/src/lib.rs
@@ -41,6 +41,13 @@ pub trait Rpc {
     #[method(name = "getAccount")]
     async fn get_account(&self, account_id: AccountId) -> Result<Account, ErrorObjectOwned>;
 
+    #[method(name = "getAccountAtBlock")]
+    async fn get_account_at_block(
+        &self,
+        account_id: AccountId,
+        block_id: BlockId,
+    ) -> Result<Account, ErrorObjectOwned>;
+
     #[method(name = "getTransaction")]
     async fn get_transaction(
         &self,
diff --git a/indexer/service/src/mock_service.rs b/indexer/service/src/mock_service.rs
index c4a099b8..a413973d 100644
--- a/indexer/service/src/mock_service.rs
+++ b/indexer/service/src/mock_service.rs
@@ -239,6 +239,22 @@ impl indexer_service_rpc::RpcServer for MockIndexerService {
             .ok_or_else(|| ErrorObjectOwned::owned(-32001, "Account not found", None::<()>))
     }
 
+    async fn get_account_at_block(
+        &self,
+        account_id: AccountId,
+        _block_id: BlockId,
+    ) -> Result<Account, ErrorObjectOwned> {
+        // Mock service does not track historical state; returns current state regardless of
+        // block_id.
+        self.state
+            .read()
+            .await
+            .accounts
+            .get(&account_id)
+            .cloned()
+            .ok_or_else(|| ErrorObjectOwned::owned(-32001, "Account not found", None::<()>))
+    }
+
     async fn get_transaction(
         &self,
         tx_hash: HashType,
diff --git a/indexer/service/src/service.rs b/indexer/service/src/service.rs
index e2f8a321..8d079265 100644
--- a/indexer/service/src/service.rs
+++ b/indexer/service/src/service.rs
@@ -83,6 +83,19 @@ impl indexer_service_rpc::RpcServer for IndexerService {
             .into())
     }
 
+    async fn get_account_at_block(
+        &self,
+        account_id: AccountId,
+        block_id: BlockId,
+    ) -> Result<Account, ErrorObjectOwned> {
+        Ok(self
+            .indexer
+            .store
+            .account_state_at_block(&account_id.into(), block_id)
+            .map_err(db_error)?
+            .into())
+    }
+
     async fn get_transaction(
         &self,
         tx_hash: HashType,
diff --git a/indexer_ffi/indexer_ffi.h b/indexer_ffi/indexer_ffi.h
deleted file mode 100644
index 7c7d9a4d..00000000
--- a/indexer_ffi/indexer_ffi.h
+++ /dev/null
@@ -1,76 +0,0 @@
-#include <stdarg.h>
-#include <stdbool.h>
-#include <stdint.h>
-#include <stdlib.h>
-
-typedef enum OperationStatus {
-  Ok = 0,
-  NullPointer = 1,
-  InitializationError = 2,
-} OperationStatus;
-
-typedef struct IndexerServiceFFI {
-  void *indexer_handle;
-  void *runtime;
-} IndexerServiceFFI;
-
-/**
- * Simple wrapper around a pointer to a value or an error.
- *
- * Pointer is not guaranteed. You should check the error field before
- * dereferencing the pointer.
- */
-typedef struct PointerResult_IndexerServiceFFI__OperationStatus {
-  struct IndexerServiceFFI *value;
-  enum OperationStatus error;
-} PointerResult_IndexerServiceFFI__OperationStatus;
-
-typedef struct PointerResult_IndexerServiceFFI__OperationStatus InitializedIndexerServiceFFIResult;
-
-/**
- * Creates and starts an indexer based on the provided
- * configuration file path.
- *
- * # Arguments
- *
- * - `config_path`: A pointer to a string representing the path to the configuration file.
- * - `port`: Number representing a port, on which indexers RPC will start.
- *
- * # Returns
- *
- * An `InitializedIndexerServiceFFIResult` containing either a pointer to the
- * initialized `IndexerServiceFFI` or an error code.
- */
-InitializedIndexerServiceFFIResult start_indexer(const char *config_path, uint16_t port);
-
-/**
- * Stops and frees the resources associated with the given indexer service.
- *
- * # Arguments
- *
- * - `indexer`: A pointer to the `IndexerServiceFFI` instance to be stopped.
- *
- * # Returns
- *
- * An `OperationStatus` indicating success or failure.
- *
- * # Safety
- *
- * The caller must ensure that:
- * - `indexer` is a valid pointer to a `IndexerServiceFFI` instance
- * - The `IndexerServiceFFI` instance was created by this library
- * - The pointer will not be used after this function returns
- */
-enum OperationStatus stop_indexer(struct IndexerServiceFFI *indexer);
-
-/**
- * # Safety
- * It's up to the caller to pass a proper pointer, if somehow from c/c++ side
- * this is called with a type which doesn't come from a returned `CString` it
- * will cause a segfault.
- */
-void free_cstring(char *block);
-
-bool is_ok(const enum OperationStatus *self);
-
-bool is_error(const enum OperationStatus *self);
diff --git a/integration_tests/Cargo.toml b/integration_tests/Cargo.toml
index 53f0ee98..5f1f1037 100644
--- a/integration_tests/Cargo.toml
+++ b/integration_tests/Cargo.toml
@@ -19,11 +19,13 @@ indexer_service.workspace = true
 serde_json.workspace = true
 token_core.workspace = true
 ata_core.workspace = true
-indexer_service_rpc.workspace = true
+indexer_service_rpc = { workspace = true, features = ["client"] }
 sequencer_service_rpc = { workspace = true, features = ["client"] }
+jsonrpsee = { workspace = true, features = ["ws-client"] }
 wallet-ffi.workspace = true
 indexer_ffi.workspace = true
 testnet_initial_state.workspace = true
+indexer_service_protocol.workspace = true
 
 url.workspace = true
 
@@ -35,4 +37,4 @@ hex.workspace = true
 tempfile.workspace = true
 bytesize.workspace = true
 futures.workspace = true
-testcontainers = { version = "0.27.0", features = ["docker-compose"] }
+testcontainers = { version = "0.27.3", features = ["docker-compose"] }
diff --git a/integration_tests/src/config.rs b/integration_tests/src/config.rs
index faff1e79..5c381e0e 100644
--- a/integration_tests/src/config.rs
+++ b/integration_tests/src/config.rs
@@ -2,7 +2,7 @@ use std::{net::SocketAddr, path::PathBuf, time::Duration};
 
 use anyhow::{Context as _, Result};
 use bytesize::ByteSize;
-use indexer_service::{BackoffConfig, ChannelId, ClientConfig, IndexerConfig};
+use indexer_service::{ChannelId, ClientConfig, IndexerConfig};
 use key_protocol::key_management::KeyChain;
 use nssa::{Account, AccountId, PrivateKey, PublicKey};
 use nssa_core::{account::Data, program::DEFAULT_PROGRAM_ID};
@@ -59,12 +59,16 @@ impl InitialData {
         }
 
         let mut private_charlie_key_chain = KeyChain::new_os_random();
-        let mut private_charlie_account_id =
-            AccountId::from((&private_charlie_key_chain.nullifier_public_key, 0));
+        let mut private_charlie_account_id = AccountId::for_regular_private_account(
+            &private_charlie_key_chain.nullifier_public_key,
+            0,
+        );
 
         let mut private_david_key_chain = KeyChain::new_os_random();
-        let mut private_david_account_id =
-            AccountId::from((&private_david_key_chain.nullifier_public_key, 0));
+        let mut private_david_account_id = AccountId::for_regular_private_account(
+            &private_david_key_chain.nullifier_public_key,
+            0,
+        );
 
         // Ensure consistent ordering
         if private_charlie_account_id > private_david_account_id {
@@ -164,35 +168,10 @@ impl std::fmt::Display for UrlProtocol {
     }
 }
 
-pub fn indexer_config(
-    bedrock_addr: SocketAddr,
-    home: PathBuf,
-    initial_data: &InitialData,
-) -> Result<IndexerConfig> {
-    Ok(IndexerConfig {
-        home,
-        consensus_info_polling_interval: Duration::from_secs(1),
-        bedrock_client_config: ClientConfig {
-            addr: addr_to_url(UrlProtocol::Http, bedrock_addr)
-                .context("Failed to convert bedrock addr to URL")?,
-            auth: None,
-            backoff: BackoffConfig {
-                start_delay: Duration::from_millis(100),
-                max_retries: 10,
-            },
-        },
-        initial_public_accounts: Some(initial_data.sequencer_initial_public_accounts()),
-        initial_private_accounts: Some(initial_data.sequencer_initial_private_accounts()),
-        signing_key: [37; 32],
-        channel_id: bedrock_channel_id(),
-    })
-}
-
 pub fn sequencer_config(
     partial: SequencerPartialConfig,
     home: PathBuf,
     bedrock_addr: SocketAddr,
-    indexer_addr: SocketAddr,
     initial_data: &InitialData,
 ) -> Result<SequencerConfig> {
     let SequencerPartialConfig {
@@ -215,17 +194,11 @@ pub fn sequencer_config(
         initial_private_accounts: Some(initial_data.sequencer_initial_private_accounts()),
         signing_key: [37; 32],
         bedrock_config: BedrockConfig {
-            backoff: BackoffConfig {
-                start_delay: Duration::from_millis(100),
-                max_retries: 5,
-            },
             channel_id: bedrock_channel_id(),
             node_url: addr_to_url(UrlProtocol::Http, bedrock_addr)
                 .context("Failed to convert bedrock addr to URL")?,
             auth: None,
         },
-        indexer_rpc_url: addr_to_url(UrlProtocol::Ws, indexer_addr)
-            .context("Failed to convert indexer addr to URL")?,
     })
 }
 
@@ -245,6 +218,26 @@ pub fn wallet_config(
     })
 }
 
+pub fn indexer_config(
+    bedrock_addr: SocketAddr,
+    home: PathBuf,
+    initial_data: &InitialData,
+) -> Result<IndexerConfig> {
+    Ok(IndexerConfig {
+        home,
+        consensus_info_polling_interval: Duration::from_secs(1),
+        bedrock_config: ClientConfig {
+            addr: addr_to_url(UrlProtocol::Http, bedrock_addr)
+                .context("Failed to convert bedrock addr to URL")?,
+            auth: None,
+        },
+        initial_public_accounts: Some(initial_data.sequencer_initial_public_accounts()),
+        initial_private_accounts: Some(initial_data.sequencer_initial_private_accounts()),
+        signing_key: [37; 32],
+        channel_id: bedrock_channel_id(),
+    })
+}
+
 pub fn addr_to_url(protocol: UrlProtocol, addr: SocketAddr) -> Result<Url> {
     // Convert 0.0.0.0 to 127.0.0.1 for client connections
     // When binding to port 0, the server binds to 0.0.0.0:<random_port>
diff --git a/integration_tests/src/indexer_client.rs b/integration_tests/src/indexer_client.rs
new file mode 100644
index 00000000..5641d824
--- /dev/null
+++ b/integration_tests/src/indexer_client.rs
@@ -0,0 +1,34 @@
+//! Thin client wrapper for querying the indexer's JSON-RPC API in tests.
+//!
+//! The sequencer doesn't depend on the indexer at runtime — finalization comes
+//! from zone-sdk events. This wrapper exists purely for test ergonomics so
+//! integration tests can construct a single connection and call
+//! `indexer_service_rpc::RpcClient` methods directly via `Deref`.
+
+use std::ops::Deref;
+
+use anyhow::{Context as _, Result};
+use jsonrpsee::ws_client::{WsClient, WsClientBuilder};
+use log::info;
+use url::Url;
+
+pub struct IndexerClient(WsClient);
+
+impl IndexerClient {
+    pub async fn new(indexer_url: &Url) -> Result<Self> {
+        info!("Connecting to Indexer at {indexer_url}");
+        let client = WsClientBuilder::default()
+            .build(indexer_url)
+            .await
+            .context("Failed to create websocket client")?;
+        Ok(Self(client))
+    }
+}
+
+impl Deref for IndexerClient {
+    type Target = WsClient;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
diff --git a/integration_tests/src/lib.rs b/integration_tests/src/lib.rs
index fcae2c71..7abd0897 100644
--- a/integration_tests/src/lib.rs
+++ b/integration_tests/src/lib.rs
@@ -9,16 +9,19 @@ use indexer_service::IndexerHandle;
 use log::{debug, error};
 use nssa::{AccountId, PrivacyPreservingTransaction};
 use nssa_core::Commitment;
-use sequencer_core::indexer_client::{IndexerClient, IndexerClientTrait as _};
 use sequencer_service::SequencerHandle;
 use sequencer_service_rpc::{RpcClient as _, SequencerClient, SequencerClientBuilder};
 use tempfile::TempDir;
 use testcontainers::compose::DockerCompose;
 use wallet::WalletCore;
 
-use crate::setup::{setup_bedrock_node, setup_indexer, setup_sequencer, setup_wallet};
+use crate::{
+    indexer_client::IndexerClient,
+    setup::{setup_bedrock_node, setup_indexer, setup_sequencer, setup_wallet},
+};
 
 pub mod config;
+pub mod indexer_client;
 pub mod setup;
 pub mod test_context_ffi;
 
@@ -26,6 +29,7 @@ pub mod test_context_ffi;
 pub const TIME_TO_WAIT_FOR_BLOCK_SECONDS: u64 = 12;
 pub const NSSA_PROGRAM_FOR_TEST_DATA_CHANGER: &str = "data_changer.bin";
 pub const NSSA_PROGRAM_FOR_TEST_NOOP: &str = "noop.bin";
+pub const NSSA_PROGRAM_FOR_TEST_PDA_FUND_SPEND_PROXY: &str = "pda_fund_spend_proxy.bin";
 
 const BEDROCK_SERVICE_WITH_OPEN_PORT: &str = "logos-blockchain-node-0";
 const BEDROCK_SERVICE_PORT: u16 = 18080;
@@ -77,14 +81,10 @@ impl TestContext {
             .await
             .context("Failed to setup Indexer")?;
 
-        let (sequencer_handle, temp_sequencer_dir) = setup_sequencer(
-            sequencer_partial_config,
-            bedrock_addr,
-            indexer_handle.addr(),
-            &initial_data,
-        )
-        .await
-        .context("Failed to setup Sequencer")?;
+        let (sequencer_handle, temp_sequencer_dir) =
+            setup_sequencer(sequencer_partial_config, bedrock_addr, &initial_data)
+                .await
+                .context("Failed to setup Sequencer")?;
 
         let (wallet, temp_wallet_dir, wallet_password) =
             setup_wallet(sequencer_handle.addr(), &initial_data)
diff --git a/integration_tests/src/setup.rs b/integration_tests/src/setup.rs
index 58b33c60..774c67e3 100644
--- a/integration_tests/src/setup.rs
+++ b/integration_tests/src/setup.rs
@@ -119,7 +119,6 @@ pub(crate) async fn setup_indexer(
 pub(crate) async fn setup_sequencer(
     partial: config::SequencerPartialConfig,
     bedrock_addr: SocketAddr,
-    indexer_addr: SocketAddr,
     initial_data: &config::InitialData,
 ) -> Result<(SequencerHandle, TempDir)> {
     let temp_sequencer_dir =
@@ -134,7 +133,6 @@ pub(crate) async fn setup_sequencer(
         partial,
         temp_sequencer_dir.path().to_owned(),
         bedrock_addr,
-        indexer_addr,
         initial_data,
     )
     .context("Failed to create Sequencer config")?;
diff --git a/integration_tests/src/test_context_ffi.rs b/integration_tests/src/test_context_ffi.rs
index 7d21aa28..d03a4e00 100644
--- a/integration_tests/src/test_context_ffi.rs
+++ b/integration_tests/src/test_context_ffi.rs
@@ -6,7 +6,6 @@ use indexer_ffi::IndexerServiceFFI;
 use indexer_service_rpc::RpcClient as _;
 use log::{debug, error};
 use nssa::AccountId;
-use sequencer_core::indexer_client::{IndexerClient, IndexerClientTrait as _};
 use sequencer_service::SequencerHandle;
 use sequencer_service_rpc::{RpcClient as _, SequencerClient, SequencerClientBuilder};
 use tempfile::TempDir;
@@ -15,6 +14,7 @@ use wallet::WalletCore;
 
 use crate::{
     BEDROCK_SERVICE_WITH_OPEN_PORT, LOGGER, TestContextBuilder, config,
+    indexer_client::IndexerClient,
     setup::{setup_bedrock_node, setup_indexer_ffi, setup_sequencer, setup_wallet},
 };
 
@@ -85,8 +85,6 @@ impl TestContextFFI {
             .block_on(setup_sequencer(
                 sequencer_partial_config,
                 bedrock_addr,
-                // SAFETY: addr is valid if indexer_ffi is valid.
-                unsafe { indexer_ffi.addr() },
                 initial_data,
             ))
             .context("Failed to setup Sequencer")?;
@@ -268,6 +266,11 @@ impl BlockingTestContextFFI {
     pub fn runtime_clone(&self) -> Arc<tokio::runtime::Runtime> {
         Arc::<tokio::runtime::Runtime>::clone(&self.runtime)
     }
+
+    #[must_use]
+    pub const fn indexer_ffi(&self) -> *const IndexerServiceFFI {
+        &raw const (self.indexer_ffi)
+    }
 }
 
 impl Drop for BlockingTestContextFFI {
diff --git a/integration_tests/tests/auth_transfer/private.rs b/integration_tests/tests/auth_transfer/private.rs
index f08e3759..9fbc174b 100644
--- a/integration_tests/tests/auth_transfer/private.rs
+++ b/integration_tests/tests/auth_transfer/private.rs
@@ -627,14 +627,14 @@ async fn shielded_transfers_to_two_identifiers_same_npk() -> Result<()> {
     .await?;
 
     // Both accounts must be discovered with the correct balances.
-    let account_id_1 = AccountId::from((&npk, identifier_1));
+    let account_id_1 = AccountId::for_regular_private_account(&npk, identifier_1);
     let acc_1 = ctx
         .wallet()
         .get_account_private(account_id_1)
         .context("account for identifier 1 not found after sync")?;
     assert_eq!(acc_1.balance, 100);
 
-    let account_id_2 = AccountId::from((&npk, identifier_2));
+    let account_id_2 = AccountId::for_regular_private_account(&npk, identifier_2);
     let acc_2 = ctx
         .wallet()
         .get_account_private(account_id_2)
diff --git a/integration_tests/tests/indexer_ffi.rs b/integration_tests/tests/indexer_ffi.rs
index 2730f9b5..ea0924d7 100644
--- a/integration_tests/tests/indexer_ffi.rs
+++ b/integration_tests/tests/indexer_ffi.rs
@@ -1,11 +1,18 @@
 #![expect(
     clippy::shadow_unrelated,
     clippy::tests_outside_test_module,
+    clippy::undocumented_unsafe_blocks,
     reason = "We don't care about these in tests"
 )]
 
 use anyhow::{Context as _, Result};
-use indexer_service_rpc::RpcClient as _;
+use indexer_ffi::{
+    IndexerServiceFFI, OperationStatus,
+    api::{
+        PointerResult,
+        types::{FfiAccountId, FfiOption, FfiVec, account::FfiAccount, block::FfiBlock},
+    },
+};
 use integration_tests::{
     TIME_TO_WAIT_FOR_BLOCK_SECONDS, format_private_account_id, format_public_account_id,
     test_context_ffi::BlockingTestContextFFI, verify_commitment_is_in_state,
@@ -17,6 +24,23 @@ use wallet::cli::{Command, programs::native_token_transfer::AuthTransferSubcomma
 /// Maximum time to wait for the indexer to catch up to the sequencer.
 const L2_TO_L1_TIMEOUT_MILLIS: u64 = 180_000;
 
+unsafe extern "C" {
+    unsafe fn query_last_block(
+        indexer: *const IndexerServiceFFI,
+    ) -> PointerResult<u64, OperationStatus>;
+
+    unsafe fn query_block_vec(
+        indexer: *const IndexerServiceFFI,
+        before: FfiOption<u64>,
+        limit: u64,
+    ) -> PointerResult<FfiVec<FfiBlock>, OperationStatus>;
+
+    unsafe fn query_account(
+        indexer: *const IndexerServiceFFI,
+        account_id: FfiAccountId,
+    ) -> PointerResult<FfiAccount, OperationStatus>;
+}
+
 #[test]
 fn indexer_test_run_ffi() -> Result<()> {
     let blocking_ctx = BlockingTestContextFFI::new()?;
@@ -28,10 +52,19 @@ fn indexer_test_run_ffi() -> Result<()> {
     });
 
     let last_block_indexer = blocking_ctx.ctx().get_last_block_indexer(runtime_wrapped)?;
+    let last_block_indexer_ffi_res = unsafe { query_last_block(blocking_ctx.indexer_ffi()) };
+
+    assert!(last_block_indexer_ffi_res.error.is_ok());
+
+    let last_block_indexer_ffi = unsafe { *last_block_indexer_ffi_res.value };
 
     info!("Last block on ind now is {last_block_indexer}");
+    info!("Last block on ind ffi now is {last_block_indexer_ffi}");
 
     assert!(last_block_indexer > 1);
+    assert!(last_block_indexer_ffi > 1);
+
+    assert_eq!(last_block_indexer, last_block_indexer_ffi);
 
     Ok(())
 }
@@ -40,7 +73,6 @@ fn indexer_test_run_ffi() -> Result<()> {
 fn indexer_ffi_block_batching() -> Result<()> {
     let blocking_ctx = BlockingTestContextFFI::new()?;
     let runtime_wrapped = blocking_ctx.runtime();
-    let ctx = blocking_ctx.ctx();
 
     // WAIT
     info!("Waiting for indexer to parse blocks");
@@ -48,31 +80,36 @@ fn indexer_ffi_block_batching() -> Result<()> {
         tokio::time::sleep(std::time::Duration::from_millis(L2_TO_L1_TIMEOUT_MILLIS)).await;
     });
 
-    let last_block_indexer = runtime_wrapped
-        .block_on(ctx.indexer_client().get_last_finalized_block_id())
-        .unwrap();
+    let last_block_indexer_ffi_res = unsafe { query_last_block(blocking_ctx.indexer_ffi()) };
+
+    assert!(last_block_indexer_ffi_res.error.is_ok());
+
+    let last_block_indexer = unsafe { *last_block_indexer_ffi_res.value };
 
     info!("Last block on ind now is {last_block_indexer}");
 
     assert!(last_block_indexer > 1);
 
-    // Getting wide batch to fit all blocks (from latest backwards)
-    let mut block_batch = runtime_wrapped
-        .block_on(ctx.indexer_client().get_blocks(None, 100))
-        .unwrap();
+    let before_ffi = FfiOption::<u64>::from_none();
+    let limit = 100;
 
-    // Reverse to check chain consistency from oldest to newest
-    block_batch.reverse();
+    let block_batch_ffi_res =
+        unsafe { query_block_vec(blocking_ctx.indexer_ffi(), before_ffi, limit) };
 
-    // Checking chain consistency
-    let mut prev_block_hash = block_batch.first().unwrap().header.hash;
+    assert!(block_batch_ffi_res.error.is_ok());
 
-    for block in &block_batch[1..] {
-        assert_eq!(block.header.prev_block_hash, prev_block_hash);
+    let block_batch = unsafe { &*block_batch_ffi_res.value };
+
+    let mut last_block_prev_hash = unsafe { block_batch.get(0) }.header.prev_block_hash.data;
+
+    for i in 1..block_batch.len {
+        let block = unsafe { block_batch.get(i) };
+
+        assert_eq!(last_block_prev_hash, block.header.hash.data);
 
         info!("Block {} chain-consistent", block.header.block_id);
 
-        prev_block_hash = block.header.hash;
+        last_block_prev_hash = block.header.prev_block_hash.data;
     }
 
     Ok(())
@@ -82,6 +119,7 @@ fn indexer_ffi_block_batching() -> Result<()> {
 fn indexer_ffi_state_consistency() -> Result<()> {
     let mut blocking_ctx = BlockingTestContextFFI::new()?;
     let runtime_wrapped = blocking_ctx.runtime_clone();
+    let indexer_ffi = blocking_ctx.indexer_ffi();
     let ctx = blocking_ctx.ctx_mut();
 
     let command = Command::AuthTransfer(AuthTransferSubcommand::Send {
@@ -179,14 +217,21 @@ fn indexer_ffi_state_consistency() -> Result<()> {
         tokio::time::sleep(std::time::Duration::from_millis(L2_TO_L1_TIMEOUT_MILLIS)).await;
     });
 
-    let acc1_ind_state = runtime_wrapped.block_on(
-        ctx.indexer_client()
-            .get_account(ctx.existing_public_accounts()[0].into()),
-    )?;
-    let acc2_ind_state = runtime_wrapped.block_on(
-        ctx.indexer_client()
-            .get_account(ctx.existing_public_accounts()[1].into()),
-    )?;
+    let acc1_ind_state_ffi =
+        unsafe { query_account(indexer_ffi, (&ctx.existing_public_accounts()[0]).into()) };
+
+    assert!(acc1_ind_state_ffi.error.is_ok());
+
+    let acc1_ind_state_pre = unsafe { &*acc1_ind_state_ffi.value };
+    let acc1_ind_state: indexer_service_protocol::Account = acc1_ind_state_pre.into();
+
+    let acc2_ind_state_ffi =
+        unsafe { query_account(indexer_ffi, (&ctx.existing_public_accounts()[1]).into()) };
+
+    assert!(acc2_ind_state_ffi.error.is_ok());
+
+    let acc2_ind_state_pre = unsafe { &*acc2_ind_state_ffi.value };
+    let acc2_ind_state: indexer_service_protocol::Account = acc2_ind_state_pre.into();
 
     info!("Checking correct state transition");
     let acc1_seq_state =
@@ -212,6 +257,7 @@ fn indexer_ffi_state_consistency() -> Result<()> {
 fn indexer_ffi_state_consistency_with_labels() -> Result<()> {
     let mut blocking_ctx = BlockingTestContextFFI::new()?;
     let runtime_wrapped = blocking_ctx.runtime_clone();
+    let indexer_ffi = blocking_ctx.indexer_ffi();
     let ctx = blocking_ctx.ctx_mut();
 
     // Assign labels to both accounts
@@ -275,10 +321,14 @@ fn indexer_ffi_state_consistency_with_labels() -> Result<()> {
         tokio::time::sleep(std::time::Duration::from_millis(L2_TO_L1_TIMEOUT_MILLIS)).await;
     });
 
-    let acc1_ind_state = runtime_wrapped.block_on(
-        ctx.indexer_client()
-            .get_account(ctx.existing_public_accounts()[0].into()),
-    )?;
+    let acc1_ind_state_ffi =
+        unsafe { query_account(indexer_ffi, (&ctx.existing_public_accounts()[0]).into()) };
+
+    assert!(acc1_ind_state_ffi.error.is_ok());
+
+    let acc1_ind_state_pre = unsafe { &*acc1_ind_state_ffi.value };
+    let acc1_ind_state: indexer_service_protocol::Account = acc1_ind_state_pre.into();
+
     let acc1_seq_state =
         runtime_wrapped.block_on(sequencer_service_rpc::RpcClient::get_account(
             ctx.sequencer_client(),
diff --git a/integration_tests/tests/private_pda.rs b/integration_tests/tests/private_pda.rs
new file mode 100644
index 00000000..518239e7
--- /dev/null
+++ b/integration_tests/tests/private_pda.rs
@@ -0,0 +1,309 @@
+#![expect(
+    clippy::tests_outside_test_module,
+    reason = "We don't care about these in tests"
+)]
+
+use std::{path::PathBuf, time::Duration};
+
+use anyhow::{Context as _, Result};
+use integration_tests::{
+    NSSA_PROGRAM_FOR_TEST_PDA_FUND_SPEND_PROXY, TIME_TO_WAIT_FOR_BLOCK_SECONDS, TestContext,
+    verify_commitment_is_in_state,
+};
+use log::info;
+use nssa::{
+    AccountId, ProgramId, privacy_preserving_transaction::circuit::ProgramWithDependencies,
+    program::Program,
+};
+use nssa_core::{NullifierPublicKey, encryption::ViewingPublicKey, program::PdaSeed};
+use tokio::test;
+use wallet::{
+    PrivacyPreservingAccount, WalletCore,
+    cli::{Command, account::AccountSubcommand},
+};
+
+/// Funds a private PDA via the proxy program with a chained call to `auth_transfer`.
+///
+/// A direct call to `auth_transfer` cannot establish the PDA-to-npk binding because it uses
+/// `Claim::Authorized` rather than `Claim::Pda`. Routing through the proxy provides the binding
+/// via `pda_seeds` in the chained call to `auth_transfer`.
+#[expect(
+    clippy::too_many_arguments,
+    reason = "test helper — grouping args would obscure intent"
+)]
+async fn fund_private_pda(
+    wallet: &WalletCore,
+    sender: AccountId,
+    pda_account_id: AccountId,
+    npk: NullifierPublicKey,
+    vpk: ViewingPublicKey,
+    identifier: u128,
+    seed: PdaSeed,
+    amount: u128,
+    proxy_program: &ProgramWithDependencies,
+    auth_transfer_id: ProgramId,
+) -> Result<()> {
+    wallet
+        .send_privacy_preserving_tx(
+            vec![
+                PrivacyPreservingAccount::Public(sender),
+                PrivacyPreservingAccount::PrivatePdaForeign {
+                    account_id: pda_account_id,
+                    npk,
+                    vpk,
+                    identifier,
+                },
+            ],
+            Program::serialize_instruction((seed, amount, auth_transfer_id, true))
+                .context("failed to serialize pda_fund_spend_proxy fund instruction")?,
+            proxy_program,
+        )
+        .await
+        .map_err(|e| anyhow::anyhow!("{e}"))?;
+    Ok(())
+}
+
+/// Spends from an owned private PDA to a fresh private-foreign recipient.
+///
+/// Alice must own the PDA in the wallet (i.e. it must have been synced after a receive).
+#[expect(
+    clippy::too_many_arguments,
+    reason = "test helper — grouping args would obscure intent"
+)]
+async fn spend_private_pda(
+    wallet: &WalletCore,
+    pda_account_id: AccountId,
+    recipient_npk: NullifierPublicKey,
+    recipient_vpk: ViewingPublicKey,
+    seed: PdaSeed,
+    amount: u128,
+    spend_program: &ProgramWithDependencies,
+    auth_transfer_id: nssa::ProgramId,
+) -> Result<()> {
+    wallet
+        .send_privacy_preserving_tx(
+            vec![
+                PrivacyPreservingAccount::PrivatePdaOwned(pda_account_id),
+                PrivacyPreservingAccount::PrivateForeign {
+                    npk: recipient_npk,
+                    vpk: recipient_vpk,
+                    identifier: 0,
+                },
+            ],
+            Program::serialize_instruction((seed, amount, auth_transfer_id, false))
+                .context("failed to serialize pda_fund_spend_proxy instruction")?,
+            spend_program,
+        )
+        .await
+        .map_err(|e| anyhow::anyhow!("{e}"))?;
+    Ok(())
+}
+
+/// Two private transfers go to distinct members of the same PDA family (same seed and npk,
+/// but identifier=0 and identifier=1). Alice then spends from both PDAs.
+///
+/// This exercises the full identifier-diversified private PDA lifecycle:
+///   receive(id=0), receive(id=1) → sync → spend(id=0), spend(id=1) → sync → assert.
+#[test]
+async fn private_pda_family_members_receive_and_spend() -> Result<()> {
+    let mut ctx = TestContext::new().await?;
+
+    // ── Build alice's key chain ──────────────────────────────────────────────────────────────────
+    let alice_chain_index = ctx.wallet_mut().create_private_accounts_key(None);
+    let (alice_npk, alice_vpk) = {
+        let node = ctx
+            .wallet()
+            .storage()
+            .user_data
+            .private_key_tree
+            .key_map
+            .get(&alice_chain_index)
+            .context("key node was just inserted")?;
+        let kc = &node.value.0;
+        (kc.nullifier_public_key, kc.viewing_public_key.clone())
+    };
+
+    let proxy = {
+        let path = PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+            .join("../artifacts/test_program_methods")
+            .join(NSSA_PROGRAM_FOR_TEST_PDA_FUND_SPEND_PROXY);
+        Program::new(std::fs::read(&path).with_context(|| format!("reading {path:?}"))?)
+            .context("invalid pda_fund_spend_proxy binary")?
+    };
+    let auth_transfer = Program::authenticated_transfer_program();
+    let proxy_id = proxy.id();
+    let auth_transfer_id = auth_transfer.id();
+    let seed = PdaSeed::new([42; 32]);
+    let amount: u128 = 100;
+
+    let spend_program =
+        ProgramWithDependencies::new(proxy, [(auth_transfer_id, auth_transfer)].into());
+
+    let alice_pda_0_id = AccountId::for_private_pda(&proxy_id, &seed, &alice_npk, 0);
+    let alice_pda_1_id = AccountId::for_private_pda(&proxy_id, &seed, &alice_npk, 1);
+
+    // Use two different public senders to avoid nonce conflicts between the back-to-back txs.
+    let senders = ctx.existing_public_accounts();
+    let sender_0 = senders[0];
+    let sender_1 = senders[1];
+
+    // ── Receive ──────────────────────────────────────────────────────────────────────────────────
+
+    info!("Sending to alice_pda_0 (identifier=0)");
+    fund_private_pda(
+        ctx.wallet(),
+        sender_0,
+        alice_pda_0_id,
+        alice_npk,
+        alice_vpk.clone(),
+        0,
+        seed,
+        amount,
+        &spend_program,
+        auth_transfer_id,
+    )
+    .await?;
+
+    info!("Sending to alice_pda_1 (identifier=1)");
+    fund_private_pda(
+        ctx.wallet(),
+        sender_1,
+        alice_pda_1_id,
+        alice_npk,
+        alice_vpk.clone(),
+        1,
+        seed,
+        amount,
+        &spend_program,
+        auth_transfer_id,
+    )
+    .await?;
+
+    info!("Waiting for block");
+    tokio::time::sleep(Duration::from_secs(TIME_TO_WAIT_FOR_BLOCK_SECONDS)).await;
+
+    // Sync so alice's wallet discovers and stores both PDAs.
+    wallet::cli::execute_subcommand(
+        ctx.wallet_mut(),
+        Command::Account(AccountSubcommand::SyncPrivate {}),
+    )
+    .await?;
+
+    // Both PDAs must be discoverable and have the correct balance.
+    let pda_0_account = ctx
+        .wallet()
+        .get_account_private(alice_pda_0_id)
+        .context("alice_pda_0 not found after sync")?;
+    assert_eq!(pda_0_account.balance, amount);
+
+    let pda_1_account = ctx
+        .wallet()
+        .get_account_private(alice_pda_1_id)
+        .context("alice_pda_1 not found after sync")?;
+    assert_eq!(pda_1_account.balance, amount);
+
+    // Commitments for both PDAs must be in the sequencer's state.
+    let commitment_0 = ctx
+        .wallet()
+        .get_private_account_commitment(alice_pda_0_id)
+        .context("commitment for alice_pda_0 missing")?;
+    assert!(
+        verify_commitment_is_in_state(commitment_0.clone(), ctx.sequencer_client()).await,
+        "alice_pda_0 commitment not in state after receive"
+    );
+
+    let commitment_1 = ctx
+        .wallet()
+        .get_private_account_commitment(alice_pda_1_id)
+        .context("commitment for alice_pda_1 missing")?;
+    assert!(
+        verify_commitment_is_in_state(commitment_1.clone(), ctx.sequencer_client()).await,
+        "alice_pda_1 commitment not in state after receive"
+    );
+    assert_ne!(
+        commitment_0, commitment_1,
+        "distinct identifiers must yield distinct commitments"
+    );
+
+    // ── Spend ─────────────────────────────────────────────────────────────────────────────────────
+
+    // Fresh recipients — hardcoded npks not in any wallet.
+    let recipient_npk_0 = NullifierPublicKey([0xAA; 32]);
+    let recipient_vpk_0 = ViewingPublicKey::from_scalar(recipient_npk_0.0);
+
+    let recipient_npk_1 = NullifierPublicKey([0xBB; 32]);
+    let recipient_vpk_1 = ViewingPublicKey::from_scalar(recipient_npk_1.0);
+
+    let amount_spend_0: u128 = 13;
+    let amount_spend_1: u128 = 37;
+
+    info!("Alice spending from alice_pda_0");
+    spend_private_pda(
+        ctx.wallet(),
+        alice_pda_0_id,
+        recipient_npk_0,
+        recipient_vpk_0,
+        seed,
+        amount_spend_0,
+        &spend_program,
+        auth_transfer_id,
+    )
+    .await?;
+
+    info!("Alice spending from alice_pda_1");
+    spend_private_pda(
+        ctx.wallet(),
+        alice_pda_1_id,
+        recipient_npk_1,
+        recipient_vpk_1,
+        seed,
+        amount_spend_1,
+        &spend_program,
+        auth_transfer_id,
+    )
+    .await?;
+
+    info!("Waiting for block");
+    tokio::time::sleep(Duration::from_secs(TIME_TO_WAIT_FOR_BLOCK_SECONDS)).await;
+
+    wallet::cli::execute_subcommand(
+        ctx.wallet_mut(),
+        Command::Account(AccountSubcommand::SyncPrivate {}),
+    )
+    .await?;
+
+    // After spending, PDAs should have the remaining balance.
+    let pda_0_spent = ctx
+        .wallet()
+        .get_account_private(alice_pda_0_id)
+        .context("alice_pda_0 not found after spend sync")?;
+    assert_eq!(pda_0_spent.balance, amount - amount_spend_0);
+
+    let pda_1_spent = ctx
+        .wallet()
+        .get_account_private(alice_pda_1_id)
+        .context("alice_pda_1 not found after spend sync")?;
+    assert_eq!(pda_1_spent.balance, amount - amount_spend_1);
+
+    // Post-spend commitments must be in state.
+    let post_spend_commitment_0 = ctx
+        .wallet()
+        .get_private_account_commitment(alice_pda_0_id)
+        .context("post-spend commitment for alice_pda_0 missing")?;
+    assert!(
+        verify_commitment_is_in_state(post_spend_commitment_0, ctx.sequencer_client()).await,
+        "alice_pda_0 post-spend commitment not in state"
+    );
+
+    let post_spend_commitment_1 = ctx
+        .wallet()
+        .get_private_account_commitment(alice_pda_1_id)
+        .context("post-spend commitment for alice_pda_1 missing")?;
+    assert!(
+        verify_commitment_is_in_state(post_spend_commitment_1, ctx.sequencer_client()).await,
+        "alice_pda_1 post-spend commitment not in state"
+    );
+
+    info!("Private PDA family member receive-and-spend test passed");
+    Ok(())
+}
diff --git a/integration_tests/tests/shared_accounts.rs b/integration_tests/tests/shared_accounts.rs
new file mode 100644
index 00000000..80ea1bd4
--- /dev/null
+++ b/integration_tests/tests/shared_accounts.rs
@@ -0,0 +1,234 @@
+#![expect(
+    clippy::tests_outside_test_module,
+    reason = "Integration test file, not inside a #[cfg(test)] module"
+)]
+#![expect(
+    clippy::shadow_unrelated,
+    reason = "Sequential wallet commands naturally reuse the `command` binding"
+)]
+
+//! Shared account integration tests.
+//!
+//! Demonstrates:
+//! 1. Group creation and GMS distribution via seal/unseal.
+//! 2. Shared regular private account creation via `--for-gms`.
+//! 3. Funding a shared account from a public account.
+//! 4. Syncing discovers the funded shared account state.
+
+use std::time::Duration;
+
+use anyhow::{Context as _, Result};
+use integration_tests::{TIME_TO_WAIT_FOR_BLOCK_SECONDS, TestContext, format_public_account_id};
+use log::info;
+use tokio::test;
+use wallet::cli::{
+    Command, SubcommandReturnValue,
+    account::{AccountSubcommand, NewSubcommand},
+    group::GroupSubcommand,
+    programs::native_token_transfer::AuthTransferSubcommand,
+};
+
+/// Create a group, create a shared account from it, and verify registration.
+#[test]
+async fn group_create_and_shared_account_registration() -> Result<()> {
+    let mut ctx = TestContext::new().await?;
+
+    // Create a group
+    let command = Command::Group(GroupSubcommand::New {
+        name: "test-group".into(),
+    });
+    wallet::cli::execute_subcommand(ctx.wallet_mut(), command).await?;
+
+    // Verify group exists
+    assert!(
+        ctx.wallet()
+            .storage()
+            .user_data
+            .group_key_holder("test-group")
+            .is_some()
+    );
+
+    // Create a shared regular private account from the group
+    let command = Command::Account(AccountSubcommand::New(NewSubcommand::PrivateGms {
+        group: "test-group".into(),
+        label: Some("shared-acc".into()),
+        pda: false,
+        seed: None,
+        program_id: None,
+        identifier: None,
+    }));
+
+    let result = wallet::cli::execute_subcommand(ctx.wallet_mut(), command).await?;
+    let SubcommandReturnValue::RegisterAccount {
+        account_id: shared_account_id,
+    } = result
+    else {
+        anyhow::bail!("Expected RegisterAccount return value");
+    };
+
+    // Verify shared account is registered in storage
+    let entry = ctx
+        .wallet()
+        .storage()
+        .user_data
+        .shared_private_account(&shared_account_id)
+        .context("Shared account not found in storage")?;
+    assert_eq!(entry.group_label, "test-group");
+    assert!(entry.pda_seed.is_none());
+
+    info!("Shared account registered: {shared_account_id}");
+    Ok(())
+}
+
+/// GMS seal/unseal round-trip via invite/join, verify key agreement.
+#[test]
+async fn group_invite_join_key_agreement() -> Result<()> {
+    let mut ctx = TestContext::new().await?;
+
+    // Generate a sealing key
+    let command = Command::Group(GroupSubcommand::NewSealingKey);
+    wallet::cli::execute_subcommand(ctx.wallet_mut(), command).await?;
+
+    // Create a group
+    let command = Command::Group(GroupSubcommand::New {
+        name: "alice-group".into(),
+    });
+    wallet::cli::execute_subcommand(ctx.wallet_mut(), command).await?;
+
+    // Seal GMS for ourselves (simulating invite to another wallet)
+    let sealing_sk = ctx
+        .wallet()
+        .storage()
+        .user_data
+        .sealing_secret_key
+        .context("Sealing key not found")?;
+    let sealing_pk =
+        key_protocol::key_management::group_key_holder::SealingPublicKey::from_scalar(sealing_sk);
+
+    let holder = ctx
+        .wallet()
+        .storage()
+        .user_data
+        .group_key_holder("alice-group")
+        .context("Group not found")?;
+    let sealed = holder.seal_for(&sealing_pk);
+    let sealed_hex = hex::encode(&sealed);
+
+    // Join under a different name (simulating Bob receiving the sealed GMS)
+    let command = Command::Group(GroupSubcommand::Join {
+        name: "bob-copy".into(),
+        sealed: sealed_hex,
+    });
+    wallet::cli::execute_subcommand(ctx.wallet_mut(), command).await?;
+
+    // Both derive the same keys for the same derivation seed
+    let alice_holder = ctx
+        .wallet()
+        .storage()
+        .user_data
+        .group_key_holder("alice-group")
+        .unwrap();
+    let bob_holder = ctx
+        .wallet()
+        .storage()
+        .user_data
+        .group_key_holder("bob-copy")
+        .unwrap();
+
+    let seed = [42_u8; 32];
+    let alice_npk = alice_holder
+        .derive_keys_for_shared_account(&seed)
+        .generate_nullifier_public_key();
+    let bob_npk = bob_holder
+        .derive_keys_for_shared_account(&seed)
+        .generate_nullifier_public_key();
+
+    assert_eq!(
+        alice_npk, bob_npk,
+        "Key agreement: same GMS produces same keys"
+    );
+
+    info!("Key agreement verified via invite/join");
+    Ok(())
+}
+
+/// Fund a shared account from a public account via auth-transfer, then sync.
+/// TODO: Requires auth-transfer init to work with shared accounts (authorization flow).
+#[test]
+async fn fund_shared_account_from_public() -> Result<()> {
+    let mut ctx = TestContext::new().await?;
+
+    // Create group and shared account
+    let command = Command::Group(GroupSubcommand::New {
+        name: "fund-group".into(),
+    });
+    wallet::cli::execute_subcommand(ctx.wallet_mut(), command).await?;
+
+    let command = Command::Account(AccountSubcommand::New(NewSubcommand::PrivateGms {
+        group: "fund-group".into(),
+        label: None,
+        pda: false,
+        seed: None,
+        program_id: None,
+        identifier: None,
+    }));
+    let result = wallet::cli::execute_subcommand(ctx.wallet_mut(), command).await?;
+    let SubcommandReturnValue::RegisterAccount {
+        account_id: shared_id,
+    } = result
+    else {
+        anyhow::bail!("Expected RegisterAccount return value");
+    };
+
+    // Initialize the shared account under auth-transfer
+    let command = Command::AuthTransfer(AuthTransferSubcommand::Init {
+        account_id: Some(format!("Private/{shared_id}")),
+        account_label: None,
+    });
+    wallet::cli::execute_subcommand(ctx.wallet_mut(), command).await?;
+
+    tokio::time::sleep(Duration::from_secs(TIME_TO_WAIT_FOR_BLOCK_SECONDS)).await;
+
+    // Sync private accounts
+    let command = Command::Account(AccountSubcommand::SyncPrivate);
+    wallet::cli::execute_subcommand(ctx.wallet_mut(), command).await?;
+
+    // Fund from a public account
+    let from_public = ctx.existing_public_accounts()[0];
+    let command = Command::AuthTransfer(AuthTransferSubcommand::Send {
+        from: Some(format_public_account_id(from_public)),
+        from_label: None,
+        to: Some(format!("Private/{shared_id}")),
+        to_label: None,
+        to_npk: None,
+        to_vpk: None,
+        to_identifier: None,
+        amount: 100,
+    });
+    wallet::cli::execute_subcommand(ctx.wallet_mut(), command).await?;
+
+    tokio::time::sleep(Duration::from_secs(TIME_TO_WAIT_FOR_BLOCK_SECONDS)).await;
+
+    // Sync private accounts
+    let command = Command::Account(AccountSubcommand::SyncPrivate);
+    wallet::cli::execute_subcommand(ctx.wallet_mut(), command).await?;
+
+    // Verify the shared account was updated
+    let entry = ctx
+        .wallet()
+        .storage()
+        .user_data
+        .shared_private_account(&shared_id)
+        .context("Shared account not found after sync")?;
+
+    info!(
+        "Shared account balance after funding: {}",
+        entry.account.balance
+    );
+    assert_eq!(
+        entry.account.balance, 100,
+        "Shared account should have received 100"
+    );
+
+    Ok(())
+}
diff --git a/integration_tests/tests/tps.rs b/integration_tests/tests/tps.rs
index 41de30ed..1f132932 100644
--- a/integration_tests/tests/tps.rs
+++ b/integration_tests/tests/tps.rs
@@ -27,7 +27,7 @@ use nssa::{
     public_transaction as putx,
 };
 use nssa_core::{
-    MembershipProof, NullifierPublicKey,
+    InputAccountIdentity, MembershipProof, NullifierPublicKey,
     account::{AccountWithMetadata, Nonce, data::Data},
     encryption::ViewingPublicKey,
 };
@@ -220,7 +220,7 @@ fn build_privacy_transaction() -> PrivacyPreservingTransaction {
             data: Data::default(),
         },
         true,
-        AccountId::from((&sender_npk, 0)),
+        AccountId::for_regular_private_account(&sender_npk, 0),
     );
     let recipient_nsk = [2; 32];
     let recipient_vsk = [99; 32];
@@ -229,7 +229,7 @@ fn build_privacy_transaction() -> PrivacyPreservingTransaction {
     let recipient_pre = AccountWithMetadata::new(
         Account::default(),
         false,
-        AccountId::from((&recipient_npk, 0)),
+        AccountId::for_regular_private_account(&recipient_npk, 0),
     );
 
     let eph_holder_from = EphemeralKeyHolder::new(&sender_npk);
@@ -251,10 +251,19 @@ fn build_privacy_transaction() -> PrivacyPreservingTransaction {
     let (output, proof) = circuit::execute_and_prove(
         vec![sender_pre, recipient_pre],
         Program::serialize_instruction(balance_to_move).unwrap(),
-        vec![1, 2],
-        vec![(sender_npk, 0, sender_ss), (recipient_npk, 0, recipient_ss)],
-        vec![sender_nsk],
-        vec![Some(proof)],
+        vec![
+            InputAccountIdentity::PrivateAuthorizedUpdate {
+                ssk: sender_ss,
+                nsk: sender_nsk,
+                membership_proof: proof,
+                identifier: 0,
+            },
+            InputAccountIdentity::PrivateUnauthorized {
+                npk: recipient_npk,
+                ssk: recipient_ss,
+                identifier: 0,
+            },
+        ],
         &program.into(),
     )
     .unwrap();
diff --git a/integration_tests/tests/wallet_ffi.rs b/integration_tests/tests/wallet_ffi.rs
index db84b066..a0904a9a 100644
--- a/integration_tests/tests/wallet_ffi.rs
+++ b/integration_tests/tests/wallet_ffi.rs
@@ -801,7 +801,7 @@ fn test_wallet_ffi_transfer_shielded() -> Result<()> {
     let (to, to_keys) = unsafe {
         let mut out_keys = FfiPrivateAccountKeys::default();
         wallet_ffi_create_private_accounts_key(wallet_ffi_handle, &raw mut out_keys);
-        let account_id = nssa::AccountId::from((&out_keys.npk(), 0_u128));
+        let account_id = nssa::AccountId::for_regular_private_account(&out_keys.npk(), 0_u128);
         let to: FfiBytes32 = (&account_id).into();
         (to, out_keys)
     };
@@ -935,7 +935,7 @@ fn test_wallet_ffi_transfer_private() -> Result<()> {
     let (to, to_keys) = unsafe {
         let mut out_keys = FfiPrivateAccountKeys::default();
         wallet_ffi_create_private_accounts_key(wallet_ffi_handle, &raw mut out_keys);
-        let account_id = nssa::AccountId::from((&out_keys.npk(), 0_u128));
+        let account_id = nssa::AccountId::for_regular_private_account(&out_keys.npk(), 0_u128);
         let to: FfiBytes32 = (&account_id).into();
         (to, out_keys)
     };
diff --git a/key_protocol/Cargo.toml b/key_protocol/Cargo.toml
index 022f3ccd..72829ca8 100644
--- a/key_protocol/Cargo.toml
+++ b/key_protocol/Cargo.toml
@@ -26,3 +26,4 @@ itertools.workspace = true
 
 [dev-dependencies]
 base58.workspace = true
+bincode.workspace = true
diff --git a/key_protocol/src/key_management/group_key_holder.rs b/key_protocol/src/key_management/group_key_holder.rs
new file mode 100644
index 00000000..8bc9ed13
--- /dev/null
+++ b/key_protocol/src/key_management/group_key_holder.rs
@@ -0,0 +1,601 @@
+use aes_gcm::{Aes256Gcm, KeyInit as _, aead::Aead as _};
+use nssa_core::{
+    SharedSecretKey,
+    encryption::{Scalar, shared_key_derivation::Secp256k1Point},
+    program::{PdaSeed, ProgramId},
+};
+use rand::{RngCore as _, rngs::OsRng};
+use serde::{Deserialize, Serialize};
+use sha2::{Digest as _, digest::FixedOutput as _};
+
+use super::secret_holders::{PrivateKeyHolder, SecretSpendingKey};
+
+/// Public key used to seal a `GroupKeyHolder` for distribution to a recipient.
+///
+/// Wraps a secp256k1 point but is a distinct type from `ViewingPublicKey` to enforce
+/// key separation: viewing keys encrypt account state, sealing keys encrypt the GMS
+/// for off-chain distribution.
+pub struct SealingPublicKey(Secp256k1Point);
+
+impl SealingPublicKey {
+    /// Derive the sealing public key from a secret scalar.
+    #[must_use]
+    pub fn from_scalar(scalar: Scalar) -> Self {
+        Self(Secp256k1Point::from_scalar(scalar))
+    }
+
+    /// Construct from raw serialized bytes (e.g. received from another wallet).
+    #[must_use]
+    pub const fn from_bytes(bytes: Vec<u8>) -> Self {
+        Self(Secp256k1Point(bytes))
+    }
+
+    /// Returns the raw bytes for display or transmission.
+    #[must_use]
+    pub fn to_bytes(&self) -> &[u8] {
+        &self.0.0
+    }
+}
+
+/// Secret key used to unseal a `GroupKeyHolder` received from another member.
+pub type SealingSecretKey = Scalar;
+
+/// Manages shared viewing keys for a group of controllers owning private PDAs.
+///
+/// The Group Master Secret (GMS) is a 32-byte random value shared among controllers.
+/// Each private PDA owned by the group gets a unique [`SecretSpendingKey`] derived from
+/// the GMS by mixing the PDA seed into the SHA-256 input (see `secret_spending_key_for_pda`).
+///
+/// # Distribution
+///
+/// The GMS is a long-term secret and must never cross a trust boundary in raw form.
+/// Controllers share it off-chain by sealing it under each recipient's [`SealingPublicKey`]
+/// (see `seal_for` / `unseal`). Wallets persisting a `GroupKeyHolder` must encrypt it at
+/// rest; the raw bytes are exposed only via [`GroupKeyHolder::dangerous_raw_gms`], which
+/// is intended for the sealing path exclusively.
+///
+/// # Logging safety
+///
+/// `Debug` is implemented manually to redact the GMS; formatting this value with `{:?}`
+/// will not leak the secret. Code that formats through `{:#?}` on containing types is
+/// safe for the same reason.
+#[derive(Serialize, Deserialize, Clone)]
+pub struct GroupKeyHolder {
+    gms: [u8; 32],
+}
+
+impl std::fmt::Debug for GroupKeyHolder {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("GroupKeyHolder")
+            .field("gms", &"<redacted>")
+            .finish()
+    }
+}
+
+impl Default for GroupKeyHolder {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl GroupKeyHolder {
+    /// Create a new group with a fresh random GMS.
+    #[must_use]
+    pub fn new() -> Self {
+        let mut gms = [0_u8; 32];
+        OsRng.fill_bytes(&mut gms);
+        Self { gms }
+    }
+
+    /// Restore from an existing GMS (received via `unseal`).
+    #[must_use]
+    pub const fn from_gms(gms: [u8; 32]) -> Self {
+        Self { gms }
+    }
+
+    /// Returns the raw 32-byte GMS. The name reflects intent: only the sealed-distribution
+    /// path (`seal_for`) and sealed-at-rest persistence should ever need the raw bytes. Do
+    /// not log the result, do not pass it across an untrusted channel.
+    #[must_use]
+    pub const fn dangerous_raw_gms(&self) -> &[u8; 32] {
+        &self.gms
+    }
+
+    /// Derive a per-PDA [`SecretSpendingKey`] by mixing the seed into the SHA-256 input.
+    ///
+    /// Each distinct `(program_id, pda_seed)` pair produces a distinct SSK in the full 256-bit
+    /// space, so adversarial seed-grinding cannot collide two PDAs' derived keys under the same
+    /// group. Uses the codebase's 32-byte protocol-versioned domain-separation convention.
+    fn secret_spending_key_for_pda(
+        &self,
+        program_id: &ProgramId,
+        pda_seed: &PdaSeed,
+    ) -> SecretSpendingKey {
+        const PREFIX: &[u8; 32] = b"/LEE/v0.3/GroupKeyDerivation/SSK";
+        let mut hasher = sha2::Sha256::new();
+        hasher.update(PREFIX);
+        hasher.update(self.gms);
+        for word in program_id {
+            hasher.update(word.to_le_bytes());
+        }
+        hasher.update(pda_seed.as_ref());
+        SecretSpendingKey(hasher.finalize_fixed().into())
+    }
+
+    /// Derive keys for a specific PDA under a given program.
+    ///
+    /// All controllers holding the same GMS independently derive the same keys for the
+    /// same `(program_id, seed)` because the derivation is deterministic.
+    #[must_use]
+    pub fn derive_keys_for_pda(
+        &self,
+        program_id: &ProgramId,
+        pda_seed: &PdaSeed,
+    ) -> PrivateKeyHolder {
+        self.secret_spending_key_for_pda(program_id, pda_seed)
+            .produce_private_key_holder(None)
+    }
+
+    /// Derive keys for a shared regular (non-PDA) private account.
+    ///
+    /// Uses a distinct domain separator from `derive_keys_for_pda` to prevent cross-domain
+    /// key collisions. The `derivation_seed` should be a stable, unique 32-byte value
+    /// (e.g. derived deterministically from the account's identifier).
+    #[must_use]
+    pub fn derive_keys_for_shared_account(&self, derivation_seed: &[u8; 32]) -> PrivateKeyHolder {
+        const PREFIX: &[u8; 32] = b"/LEE/v0.3/GroupKeyDerivation/SHA";
+        let mut hasher = sha2::Sha256::new();
+        hasher.update(PREFIX);
+        hasher.update(self.gms);
+        hasher.update(derivation_seed);
+        SecretSpendingKey(hasher.finalize_fixed().into()).produce_private_key_holder(None)
+    }
+
+    /// Encrypts this holder's GMS under the recipient's [`SealingPublicKey`].
+    ///
+    /// Uses an ephemeral ECDH key exchange to derive a shared secret, then AES-256-GCM
+    /// to encrypt the payload. The returned bytes are
+    /// `ephemeral_pubkey (33) || nonce (12) || ciphertext+tag (48)` = 93 bytes.
+    ///
+    /// Each call generates a fresh ephemeral key, so two seals of the same holder produce
+    /// different ciphertexts.
+    #[must_use]
+    pub fn seal_for(&self, recipient_key: &SealingPublicKey) -> Vec<u8> {
+        let mut ephemeral_scalar: Scalar = [0_u8; 32];
+        OsRng.fill_bytes(&mut ephemeral_scalar);
+        let ephemeral_pubkey = Secp256k1Point::from_scalar(ephemeral_scalar);
+        let shared = SharedSecretKey::new(&ephemeral_scalar, &recipient_key.0);
+        let aes_key = Self::seal_kdf(&shared);
+        let cipher = Aes256Gcm::new(&aes_key.into());
+
+        let mut nonce_bytes = [0_u8; 12];
+        OsRng.fill_bytes(&mut nonce_bytes);
+        let nonce = aes_gcm::Nonce::from(nonce_bytes);
+
+        let ciphertext = cipher
+            .encrypt(&nonce, self.gms.as_ref())
+            .expect("AES-GCM encryption should not fail with valid key/nonce");
+
+        let capacity = 33_usize
+            .checked_add(12)
+            .and_then(|n| n.checked_add(ciphertext.len()))
+            .expect("seal capacity overflow");
+        let mut out = Vec::with_capacity(capacity);
+        out.extend_from_slice(&ephemeral_pubkey.0);
+        out.extend_from_slice(&nonce_bytes);
+        out.extend_from_slice(&ciphertext);
+        out
+    }
+
+    /// Decrypts a sealed `GroupKeyHolder` using the recipient's [`SealingSecretKey`].
+    ///
+    /// Returns `Err` if the ciphertext is too short, the ECDH point is invalid, or the
+    /// AES-GCM authentication tag doesn't verify (wrong key or tampered data).
+    pub fn unseal(sealed: &[u8], own_key: &SealingSecretKey) -> Result<Self, SealError> {
+        const HEADER_LEN: usize = 33 + 12;
+        const MIN_LEN: usize = HEADER_LEN + 16;
+        if sealed.len() < MIN_LEN {
+            return Err(SealError::TooShort);
+        }
+        // MIN_LEN (61) > HEADER_LEN (45), so all slicing below is in bounds.
+        let ephemeral_pubkey = Secp256k1Point(sealed[..33].to_vec());
+        let nonce = aes_gcm::Nonce::from_slice(&sealed[33..HEADER_LEN]);
+        let ciphertext = &sealed[HEADER_LEN..];
+
+        let shared = SharedSecretKey::new(own_key, &ephemeral_pubkey);
+        let aes_key = Self::seal_kdf(&shared);
+        let cipher = Aes256Gcm::new(&aes_key.into());
+
+        let plaintext = cipher
+            .decrypt(nonce, ciphertext)
+            .map_err(|_err| SealError::DecryptionFailed)?;
+
+        if plaintext.len() != 32 {
+            return Err(SealError::DecryptionFailed);
+        }
+
+        let mut gms = [0_u8; 32];
+        gms.copy_from_slice(&plaintext);
+        Ok(Self::from_gms(gms))
+    }
+
+    /// Derives an AES-256 key from the ECDH shared secret via SHA-256 with a domain prefix.
+    fn seal_kdf(shared: &SharedSecretKey) -> [u8; 32] {
+        const PREFIX: &[u8; 32] = b"/LEE/v0.3/GroupKeySeal/AES\x00\x00\x00\x00\x00\x00";
+        let mut hasher = sha2::Sha256::new();
+        hasher.update(PREFIX);
+        hasher.update(shared.0);
+        hasher.finalize_fixed().into()
+    }
+}
+
+#[derive(Debug)]
+pub enum SealError {
+    TooShort,
+    DecryptionFailed,
+}
+
+#[cfg(test)]
+mod tests {
+    use nssa_core::NullifierPublicKey;
+
+    use super::*;
+
+    const TEST_PROGRAM_ID: ProgramId = [9; 8];
+
+    /// Two holders from the same GMS derive identical keys for the same PDA seed.
+    #[test]
+    fn same_gms_same_seed_produces_same_keys() {
+        let gms = [42_u8; 32];
+        let holder_a = GroupKeyHolder::from_gms(gms);
+        let holder_b = GroupKeyHolder::from_gms(gms);
+        let seed = PdaSeed::new([1; 32]);
+
+        let keys_a = holder_a.derive_keys_for_pda(&TEST_PROGRAM_ID, &seed);
+        let keys_b = holder_b.derive_keys_for_pda(&TEST_PROGRAM_ID, &seed);
+
+        assert_eq!(
+            keys_a.generate_nullifier_public_key().to_byte_array(),
+            keys_b.generate_nullifier_public_key().to_byte_array(),
+        );
+    }
+
+    /// Different PDA seeds produce different keys from the same GMS.
+    #[test]
+    fn same_gms_different_seed_produces_different_keys() {
+        let holder = GroupKeyHolder::from_gms([42_u8; 32]);
+        let seed_a = PdaSeed::new([1; 32]);
+        let seed_b = PdaSeed::new([2; 32]);
+
+        let npk_a = holder
+            .derive_keys_for_pda(&TEST_PROGRAM_ID, &seed_a)
+            .generate_nullifier_public_key();
+        let npk_b = holder
+            .derive_keys_for_pda(&TEST_PROGRAM_ID, &seed_b)
+            .generate_nullifier_public_key();
+
+        assert_ne!(npk_a.to_byte_array(), npk_b.to_byte_array());
+    }
+
+    /// Different GMS produce different keys for the same PDA seed.
+    #[test]
+    fn different_gms_same_seed_produces_different_keys() {
+        let holder_a = GroupKeyHolder::from_gms([42_u8; 32]);
+        let holder_b = GroupKeyHolder::from_gms([99_u8; 32]);
+        let seed = PdaSeed::new([1; 32]);
+
+        let npk_a = holder_a
+            .derive_keys_for_pda(&TEST_PROGRAM_ID, &seed)
+            .generate_nullifier_public_key();
+        let npk_b = holder_b
+            .derive_keys_for_pda(&TEST_PROGRAM_ID, &seed)
+            .generate_nullifier_public_key();
+
+        assert_ne!(npk_a.to_byte_array(), npk_b.to_byte_array());
+    }
+
+    /// GMS round-trip: export and restore produces the same keys.
+    #[test]
+    fn gms_round_trip() {
+        let original = GroupKeyHolder::from_gms([7_u8; 32]);
+        let restored = GroupKeyHolder::from_gms(*original.dangerous_raw_gms());
+        let seed = PdaSeed::new([1; 32]);
+
+        let npk_original = original
+            .derive_keys_for_pda(&TEST_PROGRAM_ID, &seed)
+            .generate_nullifier_public_key();
+        let npk_restored = restored
+            .derive_keys_for_pda(&TEST_PROGRAM_ID, &seed)
+            .generate_nullifier_public_key();
+
+        assert_eq!(npk_original.to_byte_array(), npk_restored.to_byte_array());
+    }
+
+    /// The derived `NullifierPublicKey` is non-zero (sanity check).
+    #[test]
+    fn derived_npk_is_non_zero() {
+        let holder = GroupKeyHolder::from_gms([42_u8; 32]);
+        let seed = PdaSeed::new([1; 32]);
+        let npk = holder
+            .derive_keys_for_pda(&TEST_PROGRAM_ID, &seed)
+            .generate_nullifier_public_key();
+
+        assert_ne!(npk, NullifierPublicKey([0; 32]));
+    }
+
+    /// Pins the end-to-end derivation for a fixed (GMS, `ProgramId`, `PdaSeed`). Any change
+    /// to `secret_spending_key_for_pda`, the `PrivateKeyHolder` nsk/npk chain, or the
+    /// `AccountId::for_private_pda` formula breaks this test. Mirrors the pinned-value
+    /// pattern from `for_private_pda_matches_pinned_value` in `nssa_core`.
+    #[test]
+    fn pinned_end_to_end_derivation_for_private_pda() {
+        use nssa_core::{account::AccountId, program::ProgramId};
+
+        let gms = [42_u8; 32];
+        let seed = PdaSeed::new([1; 32]);
+        let program_id: ProgramId = [9; 8];
+
+        let holder = GroupKeyHolder::from_gms(gms);
+        let npk = holder
+            .derive_keys_for_pda(&TEST_PROGRAM_ID, &seed)
+            .generate_nullifier_public_key();
+        let account_id = AccountId::for_private_pda(&program_id, &seed, &npk, u128::MAX);
+
+        let expected_npk = NullifierPublicKey([
+            136, 176, 234, 71, 208, 8, 143, 142, 126, 155, 132, 18, 71, 27, 88, 56, 100, 90, 79,
+            215, 76, 92, 60, 166, 104, 35, 51, 91, 16, 114, 188, 112,
+        ]);
+        // AccountId is derived from (program_id, seed, npk), so it changes when npk changes.
+        // We verify npk is pinned, and AccountId is deterministically derived from it.
+        let expected_account_id =
+            AccountId::for_private_pda(&program_id, &seed, &expected_npk, u128::MAX);
+
+        assert_eq!(npk, expected_npk);
+        assert_eq!(account_id, expected_account_id);
+    }
+
+    /// Wallets persist `GroupKeyHolder` to disk and reload it on startup. This test pins
+    /// the serde round-trip: serialize, deserialize, and assert the derived keys for a
+    /// sample seed match on both sides. A silent encoding drift would corrupt every
+    /// group-owned account.
+    #[test]
+    fn gms_serde_round_trip_preserves_derivation() {
+        let original = GroupKeyHolder::from_gms([7_u8; 32]);
+        let encoded = bincode::serialize(&original).expect("serialize");
+        let restored: GroupKeyHolder = bincode::deserialize(&encoded).expect("deserialize");
+
+        let seed = PdaSeed::new([1; 32]);
+        let npk_original = original
+            .derive_keys_for_pda(&TEST_PROGRAM_ID, &seed)
+            .generate_nullifier_public_key();
+        let npk_restored = restored
+            .derive_keys_for_pda(&TEST_PROGRAM_ID, &seed)
+            .generate_nullifier_public_key();
+
+        assert_eq!(npk_original, npk_restored);
+        assert_eq!(original.dangerous_raw_gms(), restored.dangerous_raw_gms());
+    }
+
+    /// A `GroupKeyHolder` constructed from the same 32 bytes as a personal
+    /// `SecretSpendingKey` must not derive the same `NullifierPublicKey` as the personal
+    /// path, so a private PDA cannot be spent by a personal nullifier even under
+    /// adversarial key-material reuse. The safety rests on the group path's distinct
+    /// domain-separation prefix plus the seed mix-in (see `secret_spending_key_for_pda`).
+    #[test]
+    fn group_derivation_does_not_collide_with_personal_path_at_shared_bytes() {
+        let shared_bytes = [13_u8; 32];
+        let seed = PdaSeed::new([5; 32]);
+
+        let group_npk = GroupKeyHolder::from_gms(shared_bytes)
+            .derive_keys_for_pda(&TEST_PROGRAM_ID, &seed)
+            .generate_nullifier_public_key();
+
+        let personal_npk = SecretSpendingKey(shared_bytes)
+            .produce_private_key_holder(None)
+            .generate_nullifier_public_key();
+
+        assert_ne!(group_npk, personal_npk);
+    }
+
+    /// Seal then unseal recovers the same GMS and derived keys.
+    #[test]
+    fn seal_unseal_round_trip() {
+        let holder = GroupKeyHolder::from_gms([42_u8; 32]);
+
+        let recipient_ssk = SecretSpendingKey([7_u8; 32]);
+        let recipient_keys = recipient_ssk.produce_private_key_holder(None);
+        let recipient_vpk = recipient_keys.generate_viewing_public_key();
+        let recipient_vsk = recipient_keys.viewing_secret_key;
+
+        let sealed = holder.seal_for(&SealingPublicKey::from_bytes(recipient_vpk.0));
+        let restored = GroupKeyHolder::unseal(&sealed, &recipient_vsk).expect("unseal");
+
+        assert_eq!(restored.dangerous_raw_gms(), holder.dangerous_raw_gms());
+
+        let seed = PdaSeed::new([1; 32]);
+        assert_eq!(
+            holder
+                .derive_keys_for_pda(&TEST_PROGRAM_ID, &seed)
+                .generate_nullifier_public_key(),
+            restored
+                .derive_keys_for_pda(&TEST_PROGRAM_ID, &seed)
+                .generate_nullifier_public_key(),
+        );
+    }
+
+    /// Unsealing with a different VSK fails with `DecryptionFailed`.
+    #[test]
+    fn unseal_wrong_vsk_fails() {
+        let holder = GroupKeyHolder::from_gms([42_u8; 32]);
+
+        let recipient_ssk = SecretSpendingKey([7_u8; 32]);
+        let recipient_vpk = recipient_ssk
+            .produce_private_key_holder(None)
+            .generate_viewing_public_key();
+
+        let wrong_ssk = SecretSpendingKey([99_u8; 32]);
+        let wrong_vsk = wrong_ssk
+            .produce_private_key_holder(None)
+            .viewing_secret_key;
+
+        let sealed = holder.seal_for(&SealingPublicKey::from_bytes(recipient_vpk.0));
+        let result = GroupKeyHolder::unseal(&sealed, &wrong_vsk);
+        assert!(matches!(result, Err(super::SealError::DecryptionFailed)));
+    }
+
+    /// Tampered ciphertext fails authentication.
+    #[test]
+    fn unseal_tampered_ciphertext_fails() {
+        let holder = GroupKeyHolder::from_gms([42_u8; 32]);
+
+        let recipient_ssk = SecretSpendingKey([7_u8; 32]);
+        let recipient_keys = recipient_ssk.produce_private_key_holder(None);
+        let recipient_vpk = recipient_keys.generate_viewing_public_key();
+        let recipient_vsk = recipient_keys.viewing_secret_key;
+
+        let mut sealed = holder.seal_for(&SealingPublicKey::from_bytes(recipient_vpk.0));
+        // Flip a byte in the ciphertext portion (after ephemeral_pubkey + nonce)
+        let last = sealed.len() - 1;
+        sealed[last] ^= 0xFF;
+
+        let result = GroupKeyHolder::unseal(&sealed, &recipient_vsk);
+        assert!(matches!(result, Err(super::SealError::DecryptionFailed)));
+    }
+
+    /// Two seals of the same holder produce different ciphertexts (ephemeral randomness).
+    #[test]
+    fn two_seals_produce_different_ciphertexts() {
+        let holder = GroupKeyHolder::from_gms([42_u8; 32]);
+
+        let recipient_ssk = SecretSpendingKey([7_u8; 32]);
+        let recipient_vpk = recipient_ssk
+            .produce_private_key_holder(None)
+            .generate_viewing_public_key();
+
+        let sealing_key = SealingPublicKey::from_bytes(recipient_vpk.0);
+        let sealed_a = holder.seal_for(&sealing_key);
+        let sealed_b = holder.seal_for(&sealing_key);
+        assert_ne!(sealed_a, sealed_b);
+    }
+
+    /// Sealed payload is too short.
+    #[test]
+    fn unseal_too_short_fails() {
+        let vsk: SealingSecretKey = [7_u8; 32];
+        let result = GroupKeyHolder::unseal(&[0_u8; 10], &vsk);
+        assert!(matches!(result, Err(super::SealError::TooShort)));
+    }
+
+    /// Degenerate GMS values (all-zeros, all-ones, single-bit) must still produce valid,
+    /// non-zero, pairwise-distinct npks. Rules out accidental "if gms == default { return
+    /// default }" style shortcuts in the derivation.
+    #[test]
+    fn degenerate_gms_produces_distinct_non_zero_keys() {
+        let seed = PdaSeed::new([1; 32]);
+        let degenerate = [[0_u8; 32], [0xFF_u8; 32], {
+            let mut v = [0_u8; 32];
+            v[0] = 1;
+            v
+        }];
+
+        let npks: Vec<NullifierPublicKey> = degenerate
+            .iter()
+            .map(|gms| {
+                GroupKeyHolder::from_gms(*gms)
+                    .derive_keys_for_pda(&TEST_PROGRAM_ID, &seed)
+                    .generate_nullifier_public_key()
+            })
+            .collect();
+
+        for npk in &npks {
+            assert_ne!(*npk, NullifierPublicKey([0; 32]));
+        }
+        for (i, a) in npks.iter().enumerate() {
+            for b in &npks[i + 1..] {
+                assert_ne!(a, b);
+            }
+        }
+    }
+
+    /// Full lifecycle: create group, distribute GMS via seal/unseal, verify key agreement.
+    #[test]
+    fn group_pda_lifecycle() {
+        use nssa_core::account::AccountId;
+
+        let alice_holder = GroupKeyHolder::new();
+        let pda_seed = PdaSeed::new([42_u8; 32]);
+        let program_id: nssa_core::program::ProgramId = [1; 8];
+
+        // Derive Alice's keys
+        let alice_keys = alice_holder.derive_keys_for_pda(&TEST_PROGRAM_ID, &pda_seed);
+        let alice_npk = alice_keys.generate_nullifier_public_key();
+
+        // Seal GMS for Bob using Bob's viewing key, Bob unseals
+        let bob_ssk = SecretSpendingKey([77_u8; 32]);
+        let bob_keys = bob_ssk.produce_private_key_holder(None);
+        let bob_vpk = bob_keys.generate_viewing_public_key();
+        let bob_vsk = bob_keys.viewing_secret_key;
+
+        let sealed = alice_holder.seal_for(&SealingPublicKey::from_bytes(bob_vpk.0));
+        let bob_holder =
+            GroupKeyHolder::unseal(&sealed, &bob_vsk).expect("Bob should unseal the GMS");
+
+        // Key agreement: both derive identical NPK and AccountId
+        let bob_npk = bob_holder
+            .derive_keys_for_pda(&TEST_PROGRAM_ID, &pda_seed)
+            .generate_nullifier_public_key();
+        assert_eq!(alice_npk, bob_npk);
+
+        let alice_account_id = AccountId::for_private_pda(&program_id, &pda_seed, &alice_npk, 0);
+        let bob_account_id = AccountId::for_private_pda(&program_id, &pda_seed, &bob_npk, 0);
+        assert_eq!(alice_account_id, bob_account_id);
+    }
+
+    /// Same GMS + same derivation seed produces same keys for shared accounts.
+    #[test]
+    fn shared_account_same_gms_same_seed_produces_same_keys() {
+        let gms = [42_u8; 32];
+        let derivation_seed = [1_u8; 32];
+        let holder_a = GroupKeyHolder::from_gms(gms);
+        let holder_b = GroupKeyHolder::from_gms(gms);
+
+        let npk_a = holder_a
+            .derive_keys_for_shared_account(&derivation_seed)
+            .generate_nullifier_public_key();
+        let npk_b = holder_b
+            .derive_keys_for_shared_account(&derivation_seed)
+            .generate_nullifier_public_key();
+
+        assert_eq!(npk_a, npk_b);
+    }
+
+    /// Different derivation seeds produce different keys for shared accounts.
+    #[test]
+    fn shared_account_different_seeds_produce_different_keys() {
+        let holder = GroupKeyHolder::from_gms([42_u8; 32]);
+        let npk_a = holder
+            .derive_keys_for_shared_account(&[1_u8; 32])
+            .generate_nullifier_public_key();
+        let npk_b = holder
+            .derive_keys_for_shared_account(&[2_u8; 32])
+            .generate_nullifier_public_key();
+
+        assert_ne!(npk_a, npk_b);
+    }
+
+    /// PDA and shared account derivations from the same GMS + same bytes never collide.
+    #[test]
+    fn pda_and_shared_derivations_do_not_collide() {
+        let holder = GroupKeyHolder::from_gms([42_u8; 32]);
+        let bytes = [1_u8; 32];
+
+        let pda_npk = holder
+            .derive_keys_for_pda(&TEST_PROGRAM_ID, &PdaSeed::new(bytes))
+            .generate_nullifier_public_key();
+        let shared_npk = holder
+            .derive_keys_for_shared_account(&bytes)
+            .generate_nullifier_public_key();
+
+        assert_ne!(pda_npk, shared_npk);
+    }
+}
diff --git a/key_protocol/src/key_management/key_tree/keys_private.rs b/key_protocol/src/key_management/key_tree/keys_private.rs
index 6ffc8119..05a7c996 100644
--- a/key_protocol/src/key_management/key_tree/keys_private.rs
+++ b/key_protocol/src/key_management/key_tree/keys_private.rs
@@ -1,5 +1,5 @@
 use k256::{Scalar, elliptic_curve::PrimeField as _};
-use nssa_core::{Identifier, NullifierPublicKey, encryption::ViewingPublicKey};
+use nssa_core::{NullifierPublicKey, PrivateAccountKind, encryption::ViewingPublicKey};
 use serde::{Deserialize, Serialize};
 
 use crate::key_management::{
@@ -10,7 +10,7 @@ use crate::key_management::{
 
 #[derive(Debug, Serialize, Deserialize, Clone)]
 pub struct ChildKeysPrivate {
-    pub value: (KeyChain, Vec<(Identifier, nssa::Account)>),
+    pub value: (KeyChain, Vec<(PrivateAccountKind, nssa::Account)>),
     pub ccc: [u8; 32],
     /// Can be [`None`] if root.
     pub cci: Option<u32>,
@@ -115,9 +115,11 @@ impl KeyTreeNode for ChildKeysPrivate {
     }
 
     fn account_ids(&self) -> impl Iterator<Item = nssa::AccountId> {
-        self.value.1.iter().map(|(identifier, _)| {
-            nssa::AccountId::from((&self.value.0.nullifier_public_key, *identifier))
-        })
+        let npk = self.value.0.nullifier_public_key;
+        self.value
+            .1
+            .iter()
+            .map(move |(kind, _)| nssa::AccountId::for_private_account(&npk, kind))
     }
 }
 
diff --git a/key_protocol/src/key_management/key_tree/mod.rs b/key_protocol/src/key_management/key_tree/mod.rs
index 0ae0a52f..edf9dadd 100644
--- a/key_protocol/src/key_management/key_tree/mod.rs
+++ b/key_protocol/src/key_management/key_tree/mod.rs
@@ -274,7 +274,10 @@ impl KeyTree<ChildKeysPrivate> {
         identifier: Identifier,
     ) -> Option<nssa::AccountId> {
         let node = self.key_map.get(cci)?;
-        let account_id = nssa::AccountId::from((&node.value.0.nullifier_public_key, identifier));
+        let account_id = nssa::AccountId::for_regular_private_account(
+            &node.value.0.nullifier_public_key,
+            identifier,
+        );
         if self.account_id_map.contains_key(&account_id) {
             return None;
         }
@@ -319,6 +322,7 @@ mod tests {
     use std::{collections::HashSet, str::FromStr as _};
 
     use nssa::AccountId;
+    use nssa_core::PrivateAccountKind;
 
     use super::*;
 
@@ -532,7 +536,7 @@ mod tests {
             .get_mut(&ChainIndex::from_str("/1").unwrap())
             .unwrap();
         acc.value.1.push((
-            0,
+            PrivateAccountKind::Regular(0),
             nssa::Account {
                 balance: 2,
                 ..nssa::Account::default()
@@ -544,7 +548,7 @@ mod tests {
             .get_mut(&ChainIndex::from_str("/2").unwrap())
             .unwrap();
         acc.value.1.push((
-            0,
+            PrivateAccountKind::Regular(0),
             nssa::Account {
                 balance: 3,
                 ..nssa::Account::default()
@@ -556,7 +560,7 @@ mod tests {
             .get_mut(&ChainIndex::from_str("/0/1").unwrap())
             .unwrap();
         acc.value.1.push((
-            0,
+            PrivateAccountKind::Regular(0),
             nssa::Account {
                 balance: 5,
                 ..nssa::Account::default()
@@ -568,7 +572,7 @@ mod tests {
             .get_mut(&ChainIndex::from_str("/1/0").unwrap())
             .unwrap();
         acc.value.1.push((
-            0,
+            PrivateAccountKind::Regular(0),
             nssa::Account {
                 balance: 6,
                 ..nssa::Account::default()
diff --git a/key_protocol/src/key_management/mod.rs b/key_protocol/src/key_management/mod.rs
index 065af364..aa5a1a75 100644
--- a/key_protocol/src/key_management/mod.rs
+++ b/key_protocol/src/key_management/mod.rs
@@ -6,6 +6,7 @@ use secret_holders::{PrivateKeyHolder, SecretSpendingKey, SeedHolder};
 use serde::{Deserialize, Serialize};
 
 pub mod ephemeral_key_holder;
+pub mod group_key_holder;
 pub mod key_tree;
 pub mod secret_holders;
 
diff --git a/key_protocol/src/key_protocol_core/mod.rs b/key_protocol/src/key_protocol_core/mod.rs
index 4df6df82..b228e3ef 100644
--- a/key_protocol/src/key_protocol_core/mod.rs
+++ b/key_protocol/src/key_protocol_core/mod.rs
@@ -3,11 +3,12 @@ use std::collections::BTreeMap;
 use anyhow::Result;
 use k256::AffinePoint;
 use nssa::{Account, AccountId};
-use nssa_core::Identifier;
+use nssa_core::{Identifier, PrivateAccountKind};
 use serde::{Deserialize, Serialize};
 
 use crate::key_management::{
     KeyChain,
+    group_key_holder::GroupKeyHolder,
     key_tree::{KeyTreePrivate, KeyTreePublic, chain_index::ChainIndex},
     secret_holders::SeedHolder,
 };
@@ -17,10 +18,25 @@ pub type PublicKey = AffinePoint;
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub struct UserPrivateAccountData {
     pub key_chain: KeyChain,
-    pub accounts: Vec<(Identifier, Account)>,
+    pub accounts: Vec<(PrivateAccountKind, Account)>,
 }
 
+/// Metadata for a shared account (GMS-derived), stored alongside the cached plaintext state.
+/// The group label and identifier (or PDA seed) are needed to re-derive keys during sync.
 #[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct SharedAccountEntry {
+    pub group_label: String,
+    pub identifier: Identifier,
+    /// For PDA accounts, the seed and program ID used to derive keys via `derive_keys_for_pda`.
+    /// `None` for regular shared accounts (keys derived from identifier via derivation seed).
+    #[serde(default)]
+    pub pda_seed: Option<nssa_core::program::PdaSeed>,
+    #[serde(default)]
+    pub pda_program_id: Option<nssa_core::program::ProgramId>,
+    pub account: Account,
+}
+
+#[derive(Clone, Debug)]
 pub struct NSSAUserData {
     /// Default public accounts.
     pub default_pub_account_signing_keys: BTreeMap<nssa::AccountId, nssa::PrivateKey>,
@@ -30,6 +46,16 @@ pub struct NSSAUserData {
     pub public_key_tree: KeyTreePublic,
     /// Tree of private keys.
     pub private_key_tree: KeyTreePrivate,
+    /// Group key holders for shared account management, keyed by a human-readable label.
+    pub group_key_holders: BTreeMap<String, GroupKeyHolder>,
+    /// Cached plaintext state of shared private accounts (PDAs and regular shared accounts),
+    /// keyed by `AccountId`. Each entry stores the group label and identifier needed
+    /// to re-derive keys during sync.
+    pub shared_private_accounts: BTreeMap<nssa::AccountId, SharedAccountEntry>,
+    /// Dedicated sealing secret key for GMS distribution. Generated once via
+    /// `wallet group new-sealing-key`. The corresponding public key is shared with
+    /// group members so they can seal GMS for this wallet.
+    pub sealing_secret_key: Option<nssa_core::encryption::Scalar>,
 }
 
 impl NSSAUserData {
@@ -53,10 +79,11 @@ impl NSSAUserData {
     ) -> bool {
         let mut check_res = true;
         for (account_id, entry) in accounts_keys_map {
-            let any_match = entry.accounts.iter().any(|(identifier, _)| {
-                nssa::AccountId::from((&entry.key_chain.nullifier_public_key, *identifier))
-                    == *account_id
-            });
+            let npk = &entry.key_chain.nullifier_public_key;
+            let any_match = entry
+                .accounts
+                .iter()
+                .any(|(kind, _)| nssa::AccountId::for_private_account(npk, kind) == *account_id);
             if !any_match {
                 println!("No matching entry found for account_id {account_id}");
                 check_res = false;
@@ -88,6 +115,9 @@ impl NSSAUserData {
             default_user_private_accounts: default_accounts_key_chains,
             public_key_tree,
             private_key_tree,
+            group_key_holders: BTreeMap::new(),
+            shared_private_accounts: BTreeMap::new(),
+            sealing_secret_key: None,
         })
     }
 
@@ -148,6 +178,7 @@ impl NSSAUserData {
     }
 
     /// Returns the key chain and account data for the given private account ID.
+    /// Does not cover shared private accounts — use `shared_private_account` for those.
     #[must_use]
     pub fn get_private_account(
         &self,
@@ -155,24 +186,27 @@ impl NSSAUserData {
     ) -> Option<(KeyChain, nssa_core::account::Account, Identifier)> {
         // Check default accounts
         if let Some(entry) = self.default_user_private_accounts.get(&account_id) {
-            for (identifier, account) in &entry.accounts {
-                let expected_id =
-                    nssa::AccountId::from((&entry.key_chain.nullifier_public_key, *identifier));
-                if expected_id == account_id {
-                    return Some((entry.key_chain.clone(), account.clone(), *identifier));
-                }
+            let npk = &entry.key_chain.nullifier_public_key;
+            if let Some((kind, account)) = entry
+                .accounts
+                .iter()
+                .find(|(kind, _)| nssa::AccountId::for_private_account(npk, kind) == account_id)
+            {
+                return Some((entry.key_chain.clone(), account.clone(), kind.identifier()));
             }
             return None;
         }
         // Check tree
         if let Some(node) = self.private_key_tree.get_node(account_id) {
             let key_chain = &node.value.0;
-            for (identifier, account) in &node.value.1 {
-                let expected_id =
-                    nssa::AccountId::from((&key_chain.nullifier_public_key, *identifier));
-                if expected_id == account_id {
-                    return Some((key_chain.clone(), account.clone(), *identifier));
-                }
+            let npk = &key_chain.nullifier_public_key;
+            if let Some((kind, account)) = node
+                .value
+                .1
+                .iter()
+                .find(|(kind, _)| nssa::AccountId::for_private_account(npk, kind) == account_id)
+            {
+                return Some((key_chain.clone(), account.clone(), kind.identifier()));
             }
         }
         None
@@ -195,6 +229,56 @@ impl NSSAUserData {
             .copied()
             .chain(self.private_key_tree.account_id_map.keys().copied())
     }
+
+    /// Returns the `GroupKeyHolder` for the given label, if it exists.
+    #[must_use]
+    pub fn group_key_holder(&self, label: &str) -> Option<&GroupKeyHolder> {
+        self.group_key_holders.get(label)
+    }
+
+    /// Inserts or replaces a `GroupKeyHolder` under the given label.
+    ///
+    /// If a holder already exists under this label, it is silently replaced and the old
+    /// GMS is lost. Callers must ensure label uniqueness across groups.
+    pub fn insert_group_key_holder(&mut self, label: String, holder: GroupKeyHolder) {
+        self.group_key_holders.insert(label, holder);
+    }
+
+    /// Returns the cached account for a shared private account, if it exists.
+    #[must_use]
+    pub fn shared_private_account(
+        &self,
+        account_id: &nssa::AccountId,
+    ) -> Option<&SharedAccountEntry> {
+        self.shared_private_accounts.get(account_id)
+    }
+
+    /// Inserts or replaces a shared private account entry.
+    pub fn insert_shared_private_account(
+        &mut self,
+        account_id: nssa::AccountId,
+        entry: SharedAccountEntry,
+    ) {
+        self.shared_private_accounts.insert(account_id, entry);
+    }
+
+    /// Updates the cached account state for a shared private account.
+    pub fn update_shared_private_account_state(
+        &mut self,
+        account_id: &nssa::AccountId,
+        account: nssa_core::account::Account,
+    ) {
+        if let Some(entry) = self.shared_private_accounts.get_mut(account_id) {
+            entry.account = account;
+        }
+    }
+
+    /// Iterates over all shared private accounts.
+    pub fn shared_private_accounts_iter(
+        &self,
+    ) -> impl Iterator<Item = (&nssa::AccountId, &SharedAccountEntry)> {
+        self.shared_private_accounts.iter()
+    }
 }
 
 impl Default for NSSAUserData {
@@ -214,6 +298,112 @@ impl Default for NSSAUserData {
 mod tests {
     use super::*;
 
+    #[test]
+    fn group_key_holder_storage_round_trip() {
+        let mut user_data = NSSAUserData::default();
+        assert!(user_data.group_key_holder("test-group").is_none());
+
+        let holder = GroupKeyHolder::from_gms([42_u8; 32]);
+        user_data.insert_group_key_holder(String::from("test-group"), holder.clone());
+
+        let retrieved = user_data
+            .group_key_holder("test-group")
+            .expect("should exist");
+        assert_eq!(retrieved.dangerous_raw_gms(), holder.dangerous_raw_gms());
+    }
+
+    #[test]
+    fn group_key_holders_default_empty() {
+        let user_data = NSSAUserData::default();
+        assert!(user_data.group_key_holders.is_empty());
+        assert!(user_data.shared_private_accounts.is_empty());
+    }
+
+    #[test]
+    fn shared_account_entry_serde_round_trip() {
+        use nssa_core::program::PdaSeed;
+
+        let entry = SharedAccountEntry {
+            group_label: String::from("test-group"),
+            identifier: 42,
+            pda_seed: None,
+            pda_program_id: None,
+            account: nssa_core::account::Account::default(),
+        };
+        let encoded = bincode::serialize(&entry).expect("serialize");
+        let decoded: SharedAccountEntry = bincode::deserialize(&encoded).expect("deserialize");
+        assert_eq!(decoded.group_label, "test-group");
+        assert_eq!(decoded.identifier, 42);
+        assert!(decoded.pda_seed.is_none());
+
+        let pda_entry = SharedAccountEntry {
+            group_label: String::from("pda-group"),
+            identifier: u128::MAX,
+            pda_seed: Some(PdaSeed::new([7_u8; 32])),
+            pda_program_id: Some([9; 8]),
+            account: nssa_core::account::Account::default(),
+        };
+        let pda_encoded = bincode::serialize(&pda_entry).expect("serialize pda");
+        let pda_decoded: SharedAccountEntry =
+            bincode::deserialize(&pda_encoded).expect("deserialize pda");
+        assert_eq!(pda_decoded.group_label, "pda-group");
+        assert_eq!(pda_decoded.identifier, u128::MAX);
+        assert_eq!(pda_decoded.pda_seed.unwrap(), PdaSeed::new([7_u8; 32]));
+    }
+
+    #[test]
+    fn shared_account_entry_none_pda_seed_round_trips() {
+        // Verify that an entry with pda_seed=None serializes and deserializes correctly,
+        // confirming the #[serde(default)] attribute works for backward compatibility.
+        let entry = SharedAccountEntry {
+            group_label: String::from("old"),
+            identifier: 1,
+            pda_seed: None,
+            pda_program_id: None,
+            account: nssa_core::account::Account::default(),
+        };
+        let encoded = bincode::serialize(&entry).expect("serialize");
+        let decoded: SharedAccountEntry = bincode::deserialize(&encoded).expect("deserialize");
+        assert_eq!(decoded.group_label, "old");
+        assert_eq!(decoded.identifier, 1);
+        assert!(decoded.pda_seed.is_none());
+    }
+
+    #[test]
+    fn shared_account_derives_consistent_keys_from_group() {
+        use nssa_core::program::PdaSeed;
+
+        let mut user_data = NSSAUserData::default();
+        let gms_holder = GroupKeyHolder::from_gms([42_u8; 32]);
+        user_data.insert_group_key_holder(String::from("my-group"), gms_holder);
+
+        let holder = user_data.group_key_holder("my-group").unwrap();
+
+        // Regular shared account: derive via tag
+        let tag = [1_u8; 32];
+        let keys_a = holder.derive_keys_for_shared_account(&tag);
+        let keys_b = holder.derive_keys_for_shared_account(&tag);
+        assert_eq!(
+            keys_a.generate_nullifier_public_key(),
+            keys_b.generate_nullifier_public_key(),
+        );
+
+        // PDA shared account: derive via seed
+        let seed = PdaSeed::new([2_u8; 32]);
+        let pda_keys_a = holder.derive_keys_for_pda(&[9; 8], &seed);
+        let pda_keys_b = holder.derive_keys_for_pda(&[9; 8], &seed);
+        assert_eq!(
+            pda_keys_a.generate_nullifier_public_key(),
+            pda_keys_b.generate_nullifier_public_key(),
+        );
+
+        // PDA and shared derivations don't collide
+        assert_ne!(
+            keys_a.generate_nullifier_public_key(),
+            pda_keys_a.generate_nullifier_public_key(),
+        );
+    }
+
     #[test]
     fn new_account() {
         let mut user_data = NSSAUserData::default();
diff --git a/nssa/core/src/circuit_io.rs b/nssa/core/src/circuit_io.rs
index c71003de..63c188ef 100644
--- a/nssa/core/src/circuit_io.rs
+++ b/nssa/core/src/circuit_io.rs
@@ -12,23 +12,99 @@ use crate::{
 pub struct PrivacyPreservingCircuitInput {
     /// Outputs of the program execution.
     pub program_outputs: Vec<ProgramOutput>,
-    /// Visibility mask for accounts.
-    ///
-    /// - `0` - public account
-    /// - `1` - private account with authentication
-    /// - `2` - private account without authentication
-    /// - `3` - private PDA account
-    pub visibility_mask: Vec<u8>,
-    /// Public keys and identifiers of private accounts.
-    pub private_account_keys: Vec<(NullifierPublicKey, Identifier, SharedSecretKey)>,
-    /// Nullifier secret keys for authorized private accounts.
-    pub private_account_nsks: Vec<NullifierSecretKey>,
-    /// Membership proofs for private accounts. Can be [`None`] for uninitialized accounts.
-    pub private_account_membership_proofs: Vec<Option<MembershipProof>>,
+    /// One entry per `pre_state`, in the same order as the program's `pre_states`.
+    /// Length must equal the number of `pre_states` derived from `program_outputs`.
+    /// The guest's `private_pda_npk_by_position` and `private_pda_bound_positions`
+    /// rely on this position alignment.
+    pub account_identities: Vec<InputAccountIdentity>,
     /// Program ID.
     pub program_id: ProgramId,
 }
 
+/// Per-account input to the privacy-preserving circuit. Each variant carries exactly the fields
+/// the guest needs for that account's code path.
+#[derive(Serialize, Deserialize, Clone)]
+pub enum InputAccountIdentity {
+    /// Public account. The guest reads pre/post state from `program_outputs` and emits no
+    /// commitment, ciphertext, or nullifier.
+    Public,
+    /// Init of an authorized standalone private account: no membership proof. The `pre_state`
+    /// must be `Account::default()`. The `account_id` is derived as
+    /// `AccountId::for_regular_private_account(&NullifierPublicKey::from(nsk), identifier)` and
+    /// matched against `pre_state.account_id`.
+    PrivateAuthorizedInit {
+        ssk: SharedSecretKey,
+        nsk: NullifierSecretKey,
+        identifier: Identifier,
+    },
+    /// Update of an authorized standalone private account: existing on-chain commitment, with
+    /// membership proof.
+    PrivateAuthorizedUpdate {
+        ssk: SharedSecretKey,
+        nsk: NullifierSecretKey,
+        membership_proof: MembershipProof,
+        identifier: Identifier,
+    },
+    /// Init of a standalone private account the caller does not own (e.g. a recipient who
+    /// doesn't yet exist on chain). No `nsk`, no membership proof.
+    PrivateUnauthorized {
+        npk: NullifierPublicKey,
+        ssk: SharedSecretKey,
+        identifier: Identifier,
+    },
+    /// Init of a private PDA, unauthorized. The npk-to-account_id binding is proven upstream
+    /// via `Claim::Pda(seed)` or a caller's `pda_seeds` match. The identifier diversifies the
+    /// PDA within the `(program_id, seed, npk)` family: `AccountId::for_private_pda` uses it
+    /// as the 4th input.
+    PrivatePdaInit {
+        npk: NullifierPublicKey,
+        ssk: SharedSecretKey,
+        identifier: Identifier,
+    },
+    /// Update of an existing private PDA, authorized, with membership proof. `npk` is derived
+    /// from `nsk`. Authorization is established upstream by a caller `pda_seeds` match or a
+    /// previously-seen authorization in a chained call.
+    PrivatePdaUpdate {
+        ssk: SharedSecretKey,
+        nsk: NullifierSecretKey,
+        membership_proof: MembershipProof,
+        identifier: Identifier,
+    },
+}
+
+impl InputAccountIdentity {
+    #[must_use]
+    pub const fn is_public(&self) -> bool {
+        matches!(self, Self::Public)
+    }
+
+    #[must_use]
+    pub const fn is_private_pda(&self) -> bool {
+        matches!(
+            self,
+            Self::PrivatePdaInit { .. } | Self::PrivatePdaUpdate { .. }
+        )
+    }
+
+    /// For private PDA variants, return the `(npk, identifier)` pair. `Init` carries both
+    /// directly; `Update` derives `npk` from `nsk`. For non-PDA variants returns `None`.
+    #[must_use]
+    pub fn npk_if_private_pda(&self) -> Option<(NullifierPublicKey, Identifier)> {
+        match self {
+            Self::PrivatePdaInit {
+                npk, identifier, ..
+            } => Some((*npk, *identifier)),
+            Self::PrivatePdaUpdate {
+                nsk, identifier, ..
+            } => Some((NullifierPublicKey::from(nsk), *identifier)),
+            Self::Public
+            | Self::PrivateAuthorizedInit { .. }
+            | Self::PrivateAuthorizedUpdate { .. }
+            | Self::PrivateUnauthorized { .. } => None,
+        }
+    }
+}
+
 #[derive(Serialize, Deserialize)]
 #[cfg_attr(any(feature = "host", test), derive(Debug, PartialEq, Eq))]
 pub struct PrivacyPreservingCircuitOutput {
diff --git a/nssa/core/src/encryption/mod.rs b/nssa/core/src/encryption/mod.rs
index 80d62f30..4b675d0e 100644
--- a/nssa/core/src/encryption/mod.rs
+++ b/nssa/core/src/encryption/mod.rs
@@ -8,7 +8,7 @@ use serde::{Deserialize, Serialize};
 #[cfg(feature = "host")]
 pub use shared_key_derivation::{EphemeralPublicKey, EphemeralSecretKey, ViewingPublicKey};
 
-use crate::{Commitment, Identifier, account::Account};
+use crate::{Commitment, account::Account, program::PrivateAccountKind};
 #[cfg(feature = "host")]
 pub mod shared_key_derivation;
 
@@ -40,13 +40,14 @@ impl EncryptionScheme {
     #[must_use]
     pub fn encrypt(
         account: &Account,
-        identifier: Identifier,
+        kind: &PrivateAccountKind,
         shared_secret: &SharedSecretKey,
         commitment: &Commitment,
         output_index: u32,
     ) -> Ciphertext {
-        // Plaintext: identifier (16 bytes, little-endian) || account bytes
-        let mut buffer = identifier.to_le_bytes().to_vec();
+        // Plaintext: PrivateAccountKind::HEADER_LEN bytes header || account bytes.
+        // Both variants produce the same header length — see PrivateAccountKind::to_header_bytes.
+        let mut buffer = kind.to_header_bytes().to_vec();
         buffer.extend_from_slice(&account.to_bytes());
         Self::symmetric_transform(&mut buffer, shared_secret, commitment, output_index);
         Ciphertext(buffer)
@@ -89,17 +90,19 @@ impl EncryptionScheme {
         shared_secret: &SharedSecretKey,
         commitment: &Commitment,
         output_index: u32,
-    ) -> Option<(Identifier, Account)> {
+    ) -> Option<(PrivateAccountKind, Account)> {
         use std::io::Cursor;
         let mut buffer = ciphertext.0.clone();
         Self::symmetric_transform(&mut buffer, shared_secret, commitment, output_index);
 
-        if buffer.len() < 16 {
+        if buffer.len() < PrivateAccountKind::HEADER_LEN {
             return None;
         }
-        let identifier = Identifier::from_le_bytes(buffer[..16].try_into().unwrap());
+        let header: &[u8; PrivateAccountKind::HEADER_LEN] =
+            buffer[..PrivateAccountKind::HEADER_LEN].try_into().unwrap();
+        let kind = PrivateAccountKind::from_header_bytes(header)?;
 
-        let mut cursor = Cursor::new(&buffer[16..]);
+        let mut cursor = Cursor::new(&buffer[PrivateAccountKind::HEADER_LEN..]);
         Account::from_cursor(&mut cursor)
             .inspect_err(|err| {
                 println!(
@@ -112,6 +115,43 @@ impl EncryptionScheme {
                 );
             })
             .ok()
-            .map(|account| (identifier, account))
+            .map(|account| (kind, account))
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::{
+        account::{Account, AccountId},
+        program::PdaSeed,
+    };
+
+    #[test]
+    fn encrypt_same_length_for_account_and_pda() {
+        let account = Account::default();
+        let secret = SharedSecretKey([0_u8; 32]);
+        let commitment = crate::Commitment::new(&AccountId::new([0_u8; 32]), &Account::default());
+
+        let account_ct = EncryptionScheme::encrypt(
+            &account,
+            &PrivateAccountKind::Regular(42),
+            &secret,
+            &commitment,
+            0,
+        );
+        let pda_ct = EncryptionScheme::encrypt(
+            &account,
+            &PrivateAccountKind::Pda {
+                program_id: [1_u32; 8],
+                seed: PdaSeed::new([2_u8; 32]),
+                identifier: 42,
+            },
+            &secret,
+            &commitment,
+            0,
+        );
+
+        assert_eq!(account_ct.0.len(), pda_ct.0.len());
     }
 }
diff --git a/nssa/core/src/lib.rs b/nssa/core/src/lib.rs
index 478d475c..894b611f 100644
--- a/nssa/core/src/lib.rs
+++ b/nssa/core/src/lib.rs
@@ -3,13 +3,16 @@
     reason = "We prefer to group methods by functionality rather than by type for encoding"
 )]
 
-pub use circuit_io::{PrivacyPreservingCircuitInput, PrivacyPreservingCircuitOutput};
+pub use circuit_io::{
+    InputAccountIdentity, PrivacyPreservingCircuitInput, PrivacyPreservingCircuitOutput,
+};
 pub use commitment::{
     Commitment, CommitmentSetDigest, DUMMY_COMMITMENT, DUMMY_COMMITMENT_HASH, MembershipProof,
     compute_digest_for_path,
 };
 pub use encryption::{EncryptionScheme, SharedSecretKey};
 pub use nullifier::{Identifier, Nullifier, NullifierPublicKey, NullifierSecretKey};
+pub use program::PrivateAccountKind;
 
 pub mod account;
 mod circuit_io;
diff --git a/nssa/core/src/nullifier.rs b/nssa/core/src/nullifier.rs
index aafe3f7c..ab23ddc0 100644
--- a/nssa/core/src/nullifier.rs
+++ b/nssa/core/src/nullifier.rs
@@ -12,10 +12,11 @@ pub type Identifier = u128;
 #[cfg_attr(any(feature = "host", test), derive(Hash))]
 pub struct NullifierPublicKey(pub [u8; 32]);
 
-impl From<(&NullifierPublicKey, Identifier)> for AccountId {
-    fn from(value: (&NullifierPublicKey, Identifier)) -> Self {
-        let (npk, identifier) = value;
-
+impl AccountId {
+    /// Derives an [`AccountId`] for a regular (non-PDA) private account from the nullifier public
+    /// key and identifier.
+    #[must_use]
+    pub fn for_regular_private_account(npk: &NullifierPublicKey, identifier: Identifier) -> Self {
         // 32 bytes prefix || 32 bytes npk || 16 bytes identifier
         let mut bytes = [0; 80];
         bytes[0..32].copy_from_slice(PRIVATE_ACCOUNT_ID_PREFIX);
@@ -31,6 +32,12 @@ impl From<(&NullifierPublicKey, Identifier)> for AccountId {
     }
 }
 
+impl From<(&NullifierPublicKey, Identifier)> for AccountId {
+    fn from((npk, identifier): (&NullifierPublicKey, Identifier)) -> Self {
+        Self::for_regular_private_account(npk, identifier)
+    }
+}
+
 impl AsRef<[u8]> for NullifierPublicKey {
     fn as_ref(&self) -> &[u8] {
         self.0.as_slice()
@@ -155,7 +162,7 @@ mod tests {
             253, 105, 164, 89, 84, 40, 191, 182, 119, 64, 255, 67, 142,
         ]);
 
-        let account_id = AccountId::from((&npk, 0));
+        let account_id = AccountId::for_regular_private_account(&npk, 0);
 
         assert_eq!(account_id, expected_account_id);
     }
@@ -172,7 +179,7 @@ mod tests {
             56, 247, 99, 121, 165, 182, 234, 255, 19, 127, 191, 72,
         ]);
 
-        let account_id = AccountId::from((&npk, 1));
+        let account_id = AccountId::for_regular_private_account(&npk, 1);
 
         assert_eq!(account_id, expected_account_id);
     }
@@ -190,7 +197,7 @@ mod tests {
             19, 245, 25, 214, 162, 209, 135, 252, 82, 27, 2, 174, 196,
         ]);
 
-        let account_id = AccountId::from((&npk, identifier));
+        let account_id = AccountId::for_regular_private_account(&npk, identifier);
 
         assert_eq!(account_id, expected_account_id);
     }
diff --git a/nssa/core/src/program.rs b/nssa/core/src/program.rs
index 1ef2ef6c..275b40a6 100644
--- a/nssa/core/src/program.rs
+++ b/nssa/core/src/program.rs
@@ -1,12 +1,11 @@
 use std::collections::HashSet;
 
-#[cfg(any(feature = "host", test))]
 use borsh::{BorshDeserialize, BorshSerialize};
 use risc0_zkvm::{DeserializeOwned, guest::env, serde::Deserializer};
 use serde::{Deserialize, Serialize};
 
 use crate::{
-    BlockId, NullifierPublicKey, Timestamp,
+    BlockId, Identifier, NullifierPublicKey, Timestamp,
     account::{Account, AccountId, AccountWithMetadata},
 };
 
@@ -27,7 +26,18 @@ pub struct ProgramInput<T> {
 /// Each program can derive up to `2^256` unique account IDs by choosing different
 /// seeds. PDAs allow programs to control namespaced account identifiers without
 /// collisions between programs.
-#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash, Serialize, Deserialize)]
+#[derive(
+    Debug,
+    Clone,
+    Copy,
+    Eq,
+    PartialEq,
+    Hash,
+    Serialize,
+    Deserialize,
+    BorshSerialize,
+    BorshDeserialize,
+)]
 pub struct PdaSeed([u8; 32]);
 
 impl PdaSeed {
@@ -35,6 +45,66 @@ impl PdaSeed {
     pub const fn new(value: [u8; 32]) -> Self {
         Self(value)
     }
+
+    #[must_use]
+    pub const fn as_bytes(&self) -> &[u8; 32] {
+        &self.0
+    }
+}
+
+impl AsRef<[u8]> for PdaSeed {
+    fn as_ref(&self) -> &[u8] {
+        &self.0
+    }
+}
+
+/// Discriminates the type of private account a ciphertext belongs to, carrying the data needed
+/// to reconstruct the account's [`AccountId`] on the receiver side.
+///
+/// [`AccountId`]: crate::account::AccountId
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize, BorshSerialize, BorshDeserialize)]
+pub enum PrivateAccountKind {
+    Regular(Identifier),
+    Pda {
+        program_id: ProgramId,
+        seed: PdaSeed,
+        identifier: Identifier,
+    },
+}
+
+impl PrivateAccountKind {
+    /// Borsh layout (all integers little-endian, variant index is u8):
+    ///
+    /// ```text
+    /// Regular(ident):                  0x00 || ident (16 LE) || [0u8; 64]
+    /// Pda { program_id, seed, ident }: 0x01 || program_id (32) || seed (32) || ident (16 LE)
+    /// ```
+    ///
+    /// Both variants are zero-padded to the same length so all ciphertexts are the same size,
+    /// preventing observers from distinguishing `Regular` from `Pda` via ciphertext length.
+    /// `HEADER_LEN` equals the borsh size of the largest variant (`Pda`): 1 + 32 + 32 + 16 = 81.
+    pub const HEADER_LEN: usize = 81;
+
+    #[must_use]
+    pub const fn identifier(&self) -> Identifier {
+        match self {
+            Self::Regular(identifier) | Self::Pda { identifier, .. } => *identifier,
+        }
+    }
+
+    #[must_use]
+    pub fn to_header_bytes(&self) -> [u8; Self::HEADER_LEN] {
+        let mut bytes = [0_u8; Self::HEADER_LEN];
+        let serialized = borsh::to_vec(self).expect("borsh serialization is infallible");
+        bytes[..serialized.len()].copy_from_slice(&serialized);
+        bytes
+    }
+
+    #[cfg(feature = "host")]
+    #[must_use]
+    pub fn from_header_bytes(bytes: &[u8; Self::HEADER_LEN]) -> Option<Self> {
+        BorshDeserialize::deserialize(&mut bytes.as_ref()).ok()
+    }
 }
 
 impl AccountId {
@@ -59,27 +129,31 @@ impl AccountId {
         )
     }
 
-    /// Derives an [`AccountId`] for a private PDA from the program ID, seed, and nullifier
-    /// public key.
+    /// Derives an [`AccountId`] for a private PDA from the program ID, seed, nullifier public
+    /// key, and identifier.
     ///
     /// Unlike public PDAs ([`AccountId::for_public_pda`]), this includes the `npk` in the
     /// derivation, making the address unique per group of controllers sharing viewing keys.
+    /// The `identifier` further diversifies the address, so a single `(program_id, seed, npk)`
+    /// tuple controls a family of 2^128 addresses.
     #[must_use]
     pub fn for_private_pda(
         program_id: &ProgramId,
         seed: &PdaSeed,
         npk: &NullifierPublicKey,
+        identifier: Identifier,
     ) -> Self {
         use risc0_zkvm::sha::{Impl, Sha256 as _};
         const PRIVATE_PDA_PREFIX: &[u8; 32] = b"/LEE/v0.3/AccountId/PrivatePDA/\x00";
 
-        let mut bytes = [0_u8; 128];
+        let mut bytes = [0_u8; 144];
         bytes[0..32].copy_from_slice(PRIVATE_PDA_PREFIX);
         let program_id_bytes: &[u8] =
             bytemuck::try_cast_slice(program_id).expect("ProgramId should be castable to &[u8]");
         bytes[32..64].copy_from_slice(program_id_bytes);
         bytes[64..96].copy_from_slice(&seed.0);
         bytes[96..128].copy_from_slice(&npk.to_byte_array());
+        bytes[128..144].copy_from_slice(&identifier.to_le_bytes());
         Self::new(
             Impl::hash_bytes(&bytes)
                 .as_bytes()
@@ -87,6 +161,21 @@ impl AccountId {
                 .expect("Hash output must be exactly 32 bytes long"),
         )
     }
+
+    /// Derives the [`AccountId`] for a private account from the nullifier public key and kind.
+    #[must_use]
+    pub fn for_private_account(npk: &NullifierPublicKey, kind: &PrivateAccountKind) -> Self {
+        match kind {
+            PrivateAccountKind::Regular(identifier) => {
+                Self::for_regular_private_account(npk, *identifier)
+            }
+            PrivateAccountKind::Pda {
+                program_id,
+                seed,
+                identifier,
+            } => Self::for_private_pda(program_id, seed, npk, *identifier),
+        }
+    }
 }
 
 #[derive(Debug, Serialize, Deserialize, Clone, PartialEq, Eq)]
@@ -845,19 +934,20 @@ mod tests {
     // ---- AccountId::for_private_pda tests ----
 
     /// Pins `AccountId::for_private_pda` against a hardcoded expected output for a specific
-    /// `(program_id, seed, npk)` triple. Any change to `PRIVATE_PDA_PREFIX`, byte ordering,
-    /// or the underlying hash breaks this test.
+    /// `(program_id, seed, npk, identifier)` tuple. Any change to `PRIVATE_PDA_PREFIX`, byte
+    /// ordering, or the underlying hash breaks this test.
     #[test]
     fn for_private_pda_matches_pinned_value() {
         let program_id: ProgramId = [1; 8];
         let seed = PdaSeed::new([2; 32]);
         let npk = NullifierPublicKey([3; 32]);
+        let identifier: Identifier = u128::MAX;
         let expected = AccountId::new([
-            132, 198, 103, 173, 244, 211, 188, 217, 249, 99, 126, 205, 152, 120, 192, 47, 13, 53,
-            133, 3, 17, 69, 92, 243, 140, 94, 182, 211, 218, 75, 215, 45,
+            59, 239, 182, 97, 14, 220, 96, 115, 238, 133, 143, 33, 234, 82, 237, 255, 148, 110, 54,
+            124, 98, 159, 245, 101, 146, 182, 150, 54, 37, 62, 25, 17,
         ]);
         assert_eq!(
-            AccountId::for_private_pda(&program_id, &seed, &npk),
+            AccountId::for_private_pda(&program_id, &seed, &npk, identifier),
             expected
         );
     }
@@ -870,8 +960,8 @@ mod tests {
         let npk_a = NullifierPublicKey([3; 32]);
         let npk_b = NullifierPublicKey([4; 32]);
         assert_ne!(
-            AccountId::for_private_pda(&program_id, &seed, &npk_a),
-            AccountId::for_private_pda(&program_id, &seed, &npk_b),
+            AccountId::for_private_pda(&program_id, &seed, &npk_a, u128::MAX),
+            AccountId::for_private_pda(&program_id, &seed, &npk_b, u128::MAX),
         );
     }
 
@@ -883,8 +973,8 @@ mod tests {
         let seed_b = PdaSeed::new([5; 32]);
         let npk = NullifierPublicKey([3; 32]);
         assert_ne!(
-            AccountId::for_private_pda(&program_id, &seed_a, &npk),
-            AccountId::for_private_pda(&program_id, &seed_b, &npk),
+            AccountId::for_private_pda(&program_id, &seed_a, &npk, u128::MAX),
+            AccountId::for_private_pda(&program_id, &seed_b, &npk, u128::MAX),
         );
     }
 
@@ -896,8 +986,25 @@ mod tests {
         let seed = PdaSeed::new([2; 32]);
         let npk = NullifierPublicKey([3; 32]);
         assert_ne!(
-            AccountId::for_private_pda(&program_id_a, &seed, &npk),
-            AccountId::for_private_pda(&program_id_b, &seed, &npk),
+            AccountId::for_private_pda(&program_id_a, &seed, &npk, u128::MAX),
+            AccountId::for_private_pda(&program_id_b, &seed, &npk, u128::MAX),
+        );
+    }
+
+    /// Different identifiers produce different addresses for the same `(program_id, seed, npk)`,
+    /// confirming that each `(program_id, seed, npk)` tuple controls a family of 2^128 addresses.
+    #[test]
+    fn for_private_pda_differs_for_different_identifier() {
+        let program_id: ProgramId = [1; 8];
+        let seed = PdaSeed::new([2; 32]);
+        let npk = NullifierPublicKey([3; 32]);
+        assert_ne!(
+            AccountId::for_private_pda(&program_id, &seed, &npk, 0),
+            AccountId::for_private_pda(&program_id, &seed, &npk, 1),
+        );
+        assert_ne!(
+            AccountId::for_private_pda(&program_id, &seed, &npk, 0),
+            AccountId::for_private_pda(&program_id, &seed, &npk, u128::MAX),
         );
     }
 
@@ -908,14 +1015,62 @@ mod tests {
         let program_id: ProgramId = [1; 8];
         let seed = PdaSeed::new([2; 32]);
         let npk = NullifierPublicKey([3; 32]);
-        let private_id = AccountId::for_private_pda(&program_id, &seed, &npk);
+        let private_id = AccountId::for_private_pda(&program_id, &seed, &npk, u128::MAX);
         let public_id = AccountId::for_public_pda(&program_id, &seed);
         assert_ne!(private_id, public_id);
     }
 
-    // ---- compute_public_authorized_pdas tests ----
+    #[cfg(feature = "host")]
+    #[test]
+    fn private_account_kind_header_round_trips() {
+        let regular = PrivateAccountKind::Regular(42);
+        let pda = PrivateAccountKind::Pda {
+            program_id: [1_u32; 8],
+            seed: PdaSeed::new([2_u8; 32]),
+            identifier: u128::MAX,
+        };
+        assert_eq!(
+            PrivateAccountKind::from_header_bytes(&regular.to_header_bytes()),
+            Some(regular)
+        );
+        assert_eq!(
+            PrivateAccountKind::from_header_bytes(&pda.to_header_bytes()),
+            Some(pda)
+        );
+    }
+
+    #[cfg(feature = "host")]
+    #[test]
+    fn private_account_kind_unknown_discriminant_returns_none() {
+        let mut bytes = [0_u8; PrivateAccountKind::HEADER_LEN];
+        bytes[0] = 0xFF;
+        assert_eq!(PrivateAccountKind::from_header_bytes(&bytes), None);
+    }
+
+    #[test]
+    fn for_private_account_dispatches_correctly() {
+        let program_id: ProgramId = [1; 8];
+        let seed = PdaSeed::new([2; 32]);
+        let npk = NullifierPublicKey([3; 32]);
+        let identifier: Identifier = 77;
+
+        assert_eq!(
+            AccountId::for_private_account(&npk, &PrivateAccountKind::Regular(identifier)),
+            AccountId::for_regular_private_account(&npk, identifier),
+        );
+        assert_eq!(
+            AccountId::for_private_account(
+                &npk,
+                &PrivateAccountKind::Pda {
+                    program_id,
+                    seed,
+                    identifier
+                }
+            ),
+            AccountId::for_private_pda(&program_id, &seed, &npk, identifier),
+        );
+    }
 
-    /// `compute_public_authorized_pdas` returns the public PDA addresses for the caller's seeds.
     #[test]
     fn compute_public_authorized_pdas_with_seeds() {
         let caller: ProgramId = [1; 8];
diff --git a/nssa/src/privacy_preserving_transaction/circuit.rs b/nssa/src/privacy_preserving_transaction/circuit.rs
index f5bd8cea..09e37664 100644
--- a/nssa/src/privacy_preserving_transaction/circuit.rs
+++ b/nssa/src/privacy_preserving_transaction/circuit.rs
@@ -2,8 +2,7 @@ use std::collections::{HashMap, VecDeque};
 
 use borsh::{BorshDeserialize, BorshSerialize};
 use nssa_core::{
-    Identifier, MembershipProof, NullifierPublicKey, NullifierSecretKey,
-    PrivacyPreservingCircuitInput, PrivacyPreservingCircuitOutput, SharedSecretKey,
+    InputAccountIdentity, PrivacyPreservingCircuitInput, PrivacyPreservingCircuitOutput,
     account::AccountWithMetadata,
     program::{ChainedCall, InstructionData, ProgramId, ProgramOutput},
 };
@@ -63,14 +62,10 @@ impl From<Program> for ProgramWithDependencies {
 
 /// Generates a proof of the execution of a NSSA program inside the privacy preserving execution
 /// circuit.
-/// TODO: too many parameters.
 pub fn execute_and_prove(
     pre_states: Vec<AccountWithMetadata>,
     instruction_data: InstructionData,
-    visibility_mask: Vec<u8>,
-    private_account_keys: Vec<(NullifierPublicKey, Identifier, SharedSecretKey)>,
-    private_account_nsks: Vec<NullifierSecretKey>,
-    private_account_membership_proofs: Vec<Option<MembershipProof>>,
+    account_identities: Vec<InputAccountIdentity>,
     program_with_dependencies: &ProgramWithDependencies,
 ) -> Result<(PrivacyPreservingCircuitOutput, Proof), NssaError> {
     let ProgramWithDependencies {
@@ -128,10 +123,7 @@ pub fn execute_and_prove(
 
     let circuit_input = PrivacyPreservingCircuitInput {
         program_outputs,
-        visibility_mask,
-        private_account_keys,
-        private_account_nsks,
-        private_account_membership_proofs,
+        account_identities,
         program_id: program_with_dependencies.program.id(),
     };
 
@@ -184,8 +176,10 @@ mod tests {
     #![expect(clippy::shadow_unrelated, reason = "We don't care about it in tests")]
 
     use nssa_core::{
-        Commitment, DUMMY_COMMITMENT_HASH, EncryptionScheme, Nullifier, SharedSecretKey,
+        Commitment, DUMMY_COMMITMENT_HASH, EncryptionScheme, Nullifier,
+        PrivacyPreservingCircuitOutput, SharedSecretKey,
         account::{Account, AccountId, AccountWithMetadata, Nonce, data::Data},
+        program::{PdaSeed, PrivateAccountKind},
     };
 
     use super::*;
@@ -199,6 +193,21 @@ mod tests {
         },
     };
 
+    fn decrypt_kind(
+        output: &PrivacyPreservingCircuitOutput,
+        ssk: &SharedSecretKey,
+        idx: usize,
+    ) -> PrivateAccountKind {
+        let (kind, _) = EncryptionScheme::decrypt(
+            &output.ciphertexts[idx],
+            ssk,
+            &output.new_commitments[idx],
+            u32::try_from(idx).expect("idx fits in u32"),
+        )
+        .unwrap();
+        kind
+    }
+
     #[test]
     fn prove_privacy_preserving_execution_circuit_public_and_private_pre_accounts() {
         let recipient_keys = test_private_account_keys_1();
@@ -213,7 +222,7 @@ mod tests {
             AccountId::new([0; 32]),
         );
 
-        let recipient_account_id = AccountId::from((&recipient_keys.npk(), 0));
+        let recipient_account_id = AccountId::for_regular_private_account(&recipient_keys.npk(), 0);
         let recipient = AccountWithMetadata::new(Account::default(), false, recipient_account_id);
 
         let balance_to_move: u128 = 37;
@@ -240,10 +249,14 @@ mod tests {
         let (output, proof) = execute_and_prove(
             vec![sender, recipient],
             Program::serialize_instruction(balance_to_move).unwrap(),
-            vec![0, 2],
-            vec![(recipient_keys.npk(), 0, shared_secret)],
-            vec![],
-            vec![None],
+            vec![
+                InputAccountIdentity::Public,
+                InputAccountIdentity::PrivateUnauthorized {
+                    npk: recipient_keys.npk(),
+                    ssk: shared_secret,
+                    identifier: 0,
+                },
+            ],
             &Program::authenticated_transfer_program().into(),
         )
         .unwrap();
@@ -283,12 +296,12 @@ mod tests {
                 data: Data::default(),
             },
             true,
-            AccountId::from((&sender_keys.npk(), 0)),
+            AccountId::for_regular_private_account(&sender_keys.npk(), 0),
         );
-        let sender_account_id = AccountId::from((&sender_keys.npk(), 0));
+        let sender_account_id = AccountId::for_regular_private_account(&sender_keys.npk(), 0);
         let commitment_sender = Commitment::new(&sender_account_id, &sender_pre.account);
 
-        let recipient_account_id = AccountId::from((&recipient_keys.npk(), 0));
+        let recipient_account_id = AccountId::for_regular_private_account(&recipient_keys.npk(), 0);
         let recipient = AccountWithMetadata::new(Account::default(), false, recipient_account_id);
         let balance_to_move: u128 = 37;
 
@@ -333,13 +346,21 @@ mod tests {
         let (output, proof) = execute_and_prove(
             vec![sender_pre, recipient],
             Program::serialize_instruction(balance_to_move).unwrap(),
-            vec![1, 2],
             vec![
-                (sender_keys.npk(), 0, shared_secret_1),
-                (recipient_keys.npk(), 0, shared_secret_2),
+                InputAccountIdentity::PrivateAuthorizedUpdate {
+                    ssk: shared_secret_1,
+                    nsk: sender_keys.nsk,
+                    membership_proof: commitment_set
+                        .get_proof_for(&commitment_sender)
+                        .expect("sender's commitment must be in the set"),
+                    identifier: 0,
+                },
+                InputAccountIdentity::PrivateUnauthorized {
+                    npk: recipient_keys.npk(),
+                    ssk: shared_secret_2,
+                    identifier: 0,
+                },
             ],
-            vec![sender_keys.nsk],
-            vec![commitment_set.get_proof_for(&commitment_sender), None],
             &program.into(),
         )
         .unwrap();
@@ -376,7 +397,7 @@ mod tests {
         let pre = AccountWithMetadata::new(
             Account::default(),
             false,
-            AccountId::from((&account_keys.npk(), 0)),
+            AccountId::for_regular_private_account(&account_keys.npk(), 0),
         );
 
         let validity_window_chain_caller = Program::validity_window_chain_caller();
@@ -402,10 +423,431 @@ mod tests {
         let result = execute_and_prove(
             vec![pre],
             instruction,
-            vec![2],
-            vec![(account_keys.npk(), 0, shared_secret)],
-            vec![],
-            vec![None],
+            vec![InputAccountIdentity::PrivateUnauthorized {
+                npk: account_keys.npk(),
+                ssk: shared_secret,
+                identifier: 0,
+            }],
+            &program_with_deps,
+        );
+
+        assert!(matches!(result, Err(NssaError::CircuitProvingError(_))));
+    }
+
+    /// A private PDA claimed with a non-default identifier produces a ciphertext that decrypts
+    /// to `PrivateAccountKind::Pda` carrying the correct `(program_id, seed, identifier)`.
+    #[test]
+    fn private_pda_claim_with_custom_identifier_encrypts_correct_kind() {
+        let program = Program::pda_claimer();
+        let keys = test_private_account_keys_1();
+        let npk = keys.npk();
+        let seed = PdaSeed::new([42; 32]);
+        let identifier: u128 = 99;
+        let shared_secret = SharedSecretKey::new(&[55; 32], &keys.vpk());
+
+        let account_id = AccountId::for_private_pda(&program.id(), &seed, &npk, identifier);
+        let pre_state = AccountWithMetadata::new(Account::default(), false, account_id);
+
+        let (output, _proof) = execute_and_prove(
+            vec![pre_state],
+            Program::serialize_instruction(seed).unwrap(),
+            vec![InputAccountIdentity::PrivatePdaInit {
+                npk,
+                ssk: shared_secret,
+                identifier,
+            }],
+            &program.clone().into(),
+        )
+        .unwrap();
+
+        assert_eq!(
+            decrypt_kind(&output, &shared_secret, 0),
+            PrivateAccountKind::Pda {
+                program_id: program.id(),
+                seed,
+                identifier
+            },
+        );
+    }
+
+    /// PDA init: initializes a new PDA under `authenticated_transfer`'s ownership.
+    /// The `auth_transfer_proxy` program chains to `authenticated_transfer` with `pda_seeds`
+    /// to establish authorization and the private PDA binding.
+    #[test]
+    fn private_pda_init() {
+        let program = Program::auth_transfer_proxy();
+        let auth_transfer = Program::authenticated_transfer_program();
+        let keys = test_private_account_keys_1();
+        let npk = keys.npk();
+        let seed = PdaSeed::new([42; 32]);
+        let shared_secret_pda = SharedSecretKey::new(&[55; 32], &keys.vpk());
+
+        // PDA (new, mask 3)
+        let pda_id = AccountId::for_private_pda(&program.id(), &seed, &npk, 0);
+        let pda_pre = AccountWithMetadata::new(Account::default(), false, pda_id);
+
+        let auth_id = auth_transfer.id();
+        let program_with_deps =
+            ProgramWithDependencies::new(program, [(auth_id, auth_transfer)].into());
+
+        // is_withdraw=false triggers init path (1 pre-state)
+        let instruction = Program::serialize_instruction((seed, auth_id, 0_u128, false)).unwrap();
+
+        let result = execute_and_prove(
+            vec![pda_pre],
+            instruction,
+            vec![InputAccountIdentity::PrivatePdaInit {
+                npk,
+                ssk: shared_secret_pda,
+                identifier: 0,
+            }],
+            &program_with_deps,
+        );
+
+        let (output, _proof) = result.expect("PDA init should succeed");
+        assert_eq!(output.new_commitments.len(), 1);
+    }
+
+    /// PDA withdraw: chains to `authenticated_transfer` to move balance from PDA to recipient.
+    /// Uses a default PDA (amount=0) because testing with a pre-funded PDA requires a
+    /// two-tx sequence with membership proofs.
+    #[test]
+    fn private_pda_withdraw() {
+        let program = Program::auth_transfer_proxy();
+        let auth_transfer = Program::authenticated_transfer_program();
+        let keys = test_private_account_keys_1();
+        let npk = keys.npk();
+        let seed = PdaSeed::new([42; 32]);
+        let shared_secret_pda = SharedSecretKey::new(&[55; 32], &keys.vpk());
+
+        // PDA (new, private PDA)
+        let pda_id = AccountId::for_private_pda(&program.id(), &seed, &npk, 0);
+        let pda_pre = AccountWithMetadata::new(Account::default(), false, pda_id);
+
+        // Recipient (public)
+        let recipient_id = AccountId::new([88; 32]);
+        let recipient_pre = AccountWithMetadata::new(
+            Account {
+                program_owner: auth_transfer.id(),
+                balance: 10000,
+                ..Account::default()
+            },
+            true,
+            recipient_id,
+        );
+
+        let auth_id = auth_transfer.id();
+        let program_with_deps =
+            ProgramWithDependencies::new(program, [(auth_id, auth_transfer)].into());
+
+        // is_withdraw=true, amount=0 (PDA has no balance yet)
+        let instruction = Program::serialize_instruction((seed, auth_id, 0_u128, true)).unwrap();
+
+        let result = execute_and_prove(
+            vec![pda_pre, recipient_pre],
+            instruction,
+            vec![
+                InputAccountIdentity::PrivatePdaInit {
+                    npk,
+                    ssk: shared_secret_pda,
+                    identifier: 0,
+                },
+                InputAccountIdentity::Public,
+            ],
+            &program_with_deps,
+        );
+
+        let (output, _proof) = result.expect("PDA withdraw should succeed");
+        assert_eq!(output.new_commitments.len(), 1);
+    }
+
+    /// Shared regular private account: receives funds via `authenticated_transfer` directly,
+    /// no custom program needed. This demonstrates the non-PDA shared account flow where
+    /// keys are derived from GMS via `derive_keys_for_shared_account`. The shared account
+    /// uses the standard unauthorized private account path and works with auth-transfer's
+    /// transfer path like any other private account.
+    #[test]
+    fn shared_account_receives_via_auth_transfer() {
+        let program = Program::authenticated_transfer_program();
+        let shared_keys = test_private_account_keys_1();
+        let shared_npk = shared_keys.npk();
+        let shared_identifier: u128 = 42;
+        let shared_secret = SharedSecretKey::new(&[55; 32], &shared_keys.vpk());
+
+        // Sender: public account with balance, owned by auth-transfer
+        let sender_id = AccountId::new([99; 32]);
+        let sender = AccountWithMetadata::new(
+            Account {
+                program_owner: program.id(),
+                balance: 1000,
+                ..Account::default()
+            },
+            true,
+            sender_id,
+        );
+
+        // Recipient: shared private account (new, unauthorized)
+        let shared_account_id = AccountId::from((&shared_npk, shared_identifier));
+        let recipient = AccountWithMetadata::new(Account::default(), false, shared_account_id);
+
+        let balance_to_move: u128 = 100;
+        let instruction = Program::serialize_instruction(balance_to_move).unwrap();
+
+        let result = execute_and_prove(
+            vec![sender, recipient],
+            instruction,
+            vec![
+                InputAccountIdentity::Public,
+                InputAccountIdentity::PrivateUnauthorized {
+                    npk: shared_npk,
+                    ssk: shared_secret,
+                    identifier: shared_identifier,
+                },
+            ],
+            &program.into(),
+        );
+
+        let (output, _proof) = result.expect("shared account receive should succeed");
+        // Sender is public (no commitment), recipient is private (1 commitment)
+        assert_eq!(output.new_commitments.len(), 1);
+    }
+
+    /// `PrivateAuthorizedInit` with a non-default identifier produces a ciphertext that decrypts
+    /// to `PrivateAccountKind::Regular` carrying the correct identifier.
+    #[test]
+    fn private_authorized_init_encrypts_regular_kind_with_identifier() {
+        let program = Program::authenticated_transfer_program();
+        let keys = test_private_account_keys_1();
+        let identifier: u128 = 99;
+        let ssk = SharedSecretKey::new(&[55; 32], &keys.vpk());
+        let account_id = AccountId::for_regular_private_account(&keys.npk(), identifier);
+        let pre = AccountWithMetadata::new(Account::default(), true, account_id);
+
+        let (output, _) = execute_and_prove(
+            vec![pre],
+            Program::serialize_instruction(0_u128).unwrap(),
+            vec![InputAccountIdentity::PrivateAuthorizedInit {
+                ssk,
+                nsk: keys.nsk,
+                identifier,
+            }],
+            &program.into(),
+        )
+        .unwrap();
+
+        assert_eq!(
+            decrypt_kind(&output, &ssk, 0),
+            PrivateAccountKind::Regular(identifier)
+        );
+    }
+
+    /// `PrivateUnauthorized` with a non-default identifier produces a ciphertext that decrypts
+    /// to `PrivateAccountKind::Regular` carrying the correct identifier.
+    #[test]
+    fn private_unauthorized_init_encrypts_regular_kind_with_identifier() {
+        let program = Program::authenticated_transfer_program();
+        let keys = test_private_account_keys_1();
+        let identifier: u128 = 99;
+        let ssk = SharedSecretKey::new(&[55; 32], &keys.vpk());
+
+        let sender = AccountWithMetadata::new(
+            Account {
+                program_owner: program.id(),
+                balance: 1,
+                ..Account::default()
+            },
+            true,
+            AccountId::new([0; 32]),
+        );
+        let recipient_id = AccountId::for_regular_private_account(&keys.npk(), identifier);
+        let recipient = AccountWithMetadata::new(Account::default(), false, recipient_id);
+
+        let (output, _) = execute_and_prove(
+            vec![sender, recipient],
+            Program::serialize_instruction(1_u128).unwrap(),
+            vec![
+                InputAccountIdentity::Public,
+                InputAccountIdentity::PrivateUnauthorized {
+                    npk: keys.npk(),
+                    ssk,
+                    identifier,
+                },
+            ],
+            &program.into(),
+        )
+        .unwrap();
+
+        assert_eq!(
+            decrypt_kind(&output, &ssk, 0),
+            PrivateAccountKind::Regular(identifier)
+        );
+    }
+
+    /// `PrivateAuthorizedUpdate` with a non-default identifier produces a ciphertext that decrypts
+    /// to `PrivateAccountKind::Regular` carrying the correct identifier.
+    #[test]
+    fn private_authorized_update_encrypts_regular_kind_with_identifier() {
+        let program = Program::authenticated_transfer_program();
+        let keys = test_private_account_keys_1();
+        let identifier: u128 = 99;
+        let ssk = SharedSecretKey::new(&[55; 32], &keys.vpk());
+        let account_id = AccountId::for_regular_private_account(&keys.npk(), identifier);
+        let account = Account {
+            program_owner: program.id(),
+            balance: 1,
+            ..Account::default()
+        };
+        let commitment = Commitment::new(&account_id, &account);
+        let mut commitment_set = CommitmentSet::with_capacity(1);
+        commitment_set.extend(std::slice::from_ref(&commitment));
+
+        let sender = AccountWithMetadata::new(account, true, account_id);
+        let recipient = AccountWithMetadata::new(Account::default(), true, AccountId::new([0; 32]));
+
+        let (output, _) = execute_and_prove(
+            vec![sender, recipient],
+            Program::serialize_instruction(1_u128).unwrap(),
+            vec![
+                InputAccountIdentity::PrivateAuthorizedUpdate {
+                    ssk,
+                    nsk: keys.nsk,
+                    membership_proof: commitment_set.get_proof_for(&commitment).unwrap(),
+                    identifier,
+                },
+                InputAccountIdentity::Public,
+            ],
+            &program.into(),
+        )
+        .unwrap();
+
+        assert_eq!(
+            decrypt_kind(&output, &ssk, 0),
+            PrivateAccountKind::Regular(identifier)
+        );
+    }
+
+    /// `PrivatePdaUpdate` with a non-default identifier produces a ciphertext that decrypts
+    /// to `PrivateAccountKind::Pda` carrying the correct `(program_id, seed, identifier)`.
+    #[test]
+    fn private_pda_update_encrypts_pda_kind_with_identifier() {
+        let program = Program::pda_fund_spend_proxy();
+        let auth_transfer = Program::authenticated_transfer_program();
+        let keys = test_private_account_keys_1();
+        let npk = keys.npk();
+        let seed = PdaSeed::new([42; 32]);
+        let identifier: u128 = 99;
+        let ssk = SharedSecretKey::new(&[55; 32], &keys.vpk());
+
+        let auth_transfer_id = auth_transfer.id();
+        let pda_id = AccountId::for_private_pda(&program.id(), &seed, &npk, identifier);
+        let pda_account = Account {
+            program_owner: auth_transfer_id,
+            balance: 1,
+            ..Account::default()
+        };
+        let pda_commitment = Commitment::new(&pda_id, &pda_account);
+        let mut commitment_set = CommitmentSet::with_capacity(1);
+        commitment_set.extend(std::slice::from_ref(&pda_commitment));
+
+        let pda_pre = AccountWithMetadata::new(pda_account, true, pda_id);
+        let recipient_pre =
+            AccountWithMetadata::new(Account::default(), true, AccountId::new([0; 32]));
+
+        let program_with_deps = ProgramWithDependencies::new(
+            program.clone(),
+            [(auth_transfer_id, auth_transfer)].into(),
+        );
+
+        let (output, _) = execute_and_prove(
+            vec![pda_pre, recipient_pre],
+            Program::serialize_instruction((seed, 1_u128, auth_transfer_id, false)).unwrap(),
+            vec![
+                InputAccountIdentity::PrivatePdaUpdate {
+                    ssk,
+                    nsk: keys.nsk,
+                    membership_proof: commitment_set.get_proof_for(&pda_commitment).unwrap(),
+                    identifier,
+                },
+                InputAccountIdentity::Public,
+            ],
+            &program_with_deps,
+        )
+        .unwrap();
+
+        assert_eq!(
+            decrypt_kind(&output, &ssk, 0),
+            PrivateAccountKind::Pda {
+                program_id: program.id(),
+                seed,
+                identifier
+            },
+        );
+    }
+
+    #[test]
+    fn private_pda_init_identifier_mismatch_fails() {
+        let program = Program::pda_claimer();
+        let keys = test_private_account_keys_1();
+        let npk = keys.npk();
+        let seed = PdaSeed::new([42; 32]);
+        let shared_secret = SharedSecretKey::new(&[55; 32], &keys.vpk());
+
+        let account_id = AccountId::for_private_pda(&program.id(), &seed, &npk, 5);
+        let pre_state = AccountWithMetadata::new(Account::default(), false, account_id);
+
+        let result = execute_and_prove(
+            vec![pre_state],
+            Program::serialize_instruction(seed).unwrap(),
+            vec![InputAccountIdentity::PrivatePdaInit {
+                npk,
+                ssk: shared_secret,
+                identifier: 99,
+            }],
+            &program.into(),
+        );
+
+        assert!(matches!(result, Err(NssaError::CircuitProvingError(_))));
+    }
+
+    #[test]
+    fn private_pda_update_identifier_mismatch_fails() {
+        let program = Program::pda_fund_spend_proxy();
+        let auth_transfer = Program::authenticated_transfer_program();
+        let keys = test_private_account_keys_1();
+        let npk = keys.npk();
+        let seed = PdaSeed::new([42; 32]);
+        let ssk = SharedSecretKey::new(&[55; 32], &keys.vpk());
+
+        let auth_transfer_id = auth_transfer.id();
+        let pda_id = AccountId::for_private_pda(&program.id(), &seed, &npk, 5);
+        let pda_account = Account {
+            program_owner: auth_transfer_id,
+            balance: 1,
+            ..Account::default()
+        };
+        let pda_commitment = Commitment::new(&pda_id, &pda_account);
+        let mut commitment_set = CommitmentSet::with_capacity(1);
+        commitment_set.extend(std::slice::from_ref(&pda_commitment));
+
+        let pda_pre = AccountWithMetadata::new(pda_account, true, pda_id);
+        let recipient_pre =
+            AccountWithMetadata::new(Account::default(), true, AccountId::new([0; 32]));
+
+        let program_with_deps =
+            ProgramWithDependencies::new(program, [(auth_transfer_id, auth_transfer)].into());
+
+        let result = execute_and_prove(
+            vec![pda_pre, recipient_pre],
+            Program::serialize_instruction((seed, 1_u128, auth_transfer_id, false)).unwrap(),
+            vec![
+                InputAccountIdentity::PrivatePdaUpdate {
+                    ssk,
+                    nsk: keys.nsk,
+                    membership_proof: commitment_set.get_proof_for(&pda_commitment).unwrap(),
+                    identifier: 99,
+                },
+                InputAccountIdentity::Public,
+            ],
             &program_with_deps,
         );
 
diff --git a/nssa/src/privacy_preserving_transaction/message.rs b/nssa/src/privacy_preserving_transaction/message.rs
index 01e6e04f..d86273d8 100644
--- a/nssa/src/privacy_preserving_transaction/message.rs
+++ b/nssa/src/privacy_preserving_transaction/message.rs
@@ -122,15 +122,16 @@ impl Message {
     }
 
     #[must_use]
-    pub fn hash_message(&self) -> [u8; 32] {
+    pub fn hash(&self) -> [u8; 32] {
+        let msg = self.to_bytes();
         let mut bytes = Vec::with_capacity(
             PREFIX
                 .len()
-                .checked_add(self.to_bytes().len())
+                .checked_add(msg.len())
                 .expect("length overflow"),
         );
         bytes.extend_from_slice(PREFIX);
-        bytes.extend_from_slice(&self.to_bytes());
+        bytes.extend_from_slice(&msg);
 
         Sha256::digest(bytes).into()
     }
@@ -139,7 +140,8 @@ impl Message {
 #[cfg(test)]
 pub mod tests {
     use nssa_core::{
-        Commitment, EncryptionScheme, Nullifier, NullifierPublicKey, SharedSecretKey,
+        Commitment, EncryptionScheme, Nullifier, NullifierPublicKey, PrivateAccountKind,
+        SharedSecretKey,
         account::{Account, AccountId, Nonce},
         encryption::{EphemeralPublicKey, ViewingPublicKey},
         program::{BlockValidityWindow, TimestampValidityWindow},
@@ -167,10 +169,10 @@ pub mod tests {
 
         let encrypted_private_post_states = Vec::new();
 
-        let account_id2 = nssa_core::account::AccountId::from((&npk2, 0));
+        let account_id2 = nssa_core::account::AccountId::for_regular_private_account(&npk2, 0);
         let new_commitments = vec![Commitment::new(&account_id2, &account2)];
 
-        let account_id1 = nssa_core::account::AccountId::from((&npk1, 0));
+        let account_id1 = nssa_core::account::AccountId::for_regular_private_account(&npk1, 0);
         let old_commitment = Commitment::new(&account_id1, &account1);
         let new_nullifiers = vec![(
             Nullifier::for_account_update(&old_commitment, &nsk1),
@@ -190,7 +192,7 @@ pub mod tests {
     }
 
     #[test]
-    fn hash_message_privacy_pinned() {
+    fn hash_privacy_pinned() {
         let msg = Message {
             public_account_ids: vec![AccountId::new([42_u8; 32])],
             nonces: vec![Nonce(5)],
@@ -206,7 +208,7 @@ pub mod tests {
         let nonces_bytes: &[u8] = &[1, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
         // all remaining vec fields are empty: u32 len=0
         let empty_vec_bytes: &[u8] = &[0_u8; 4];
-        // validity windows: unbounded = {from: None (0_u8), to: None (0_u8)}
+        // validity windows: unbounded = {from: None (0u8), to: None (0u8)}
         let unbounded_window_bytes: &[u8] = &[0_u8; 2];
 
         let expected_borsh_vec: Vec<u8> = [
@@ -226,7 +228,7 @@ pub mod tests {
         assert_eq!(
             borsh::to_vec(&msg).unwrap(),
             expected_borsh,
-            "`privacy_preserving_transaction::hash_message()`: expected borsh order has changed"
+            "`privacy_preserving_transaction::hash()`: expected borsh order has changed"
         );
 
         let mut preimage = Vec::with_capacity(PREFIX.len() + expected_borsh.len());
@@ -235,9 +237,9 @@ pub mod tests {
         let expected_hash: [u8; 32] = Sha256::digest(&preimage).into();
 
         assert_eq!(
-            msg.hash_message(),
+            msg.hash(),
             expected_hash,
-            "`privacy_preserving_transaction::hash_message()`: serialization has changed"
+            "`privacy_preserving_transaction::hash()`: serialization has changed"
         );
     }
 
@@ -246,12 +248,18 @@ pub mod tests {
         let npk = NullifierPublicKey::from(&[1; 32]);
         let vpk = ViewingPublicKey::from_scalar([2; 32]);
         let account = Account::default();
-        let account_id = nssa_core::account::AccountId::from((&npk, 0));
+        let account_id = nssa_core::account::AccountId::for_regular_private_account(&npk, 0);
         let commitment = Commitment::new(&account_id, &account);
         let esk = [3; 32];
         let shared_secret = SharedSecretKey::new(&esk, &vpk);
         let epk = EphemeralPublicKey::from_scalar(esk);
-        let ciphertext = EncryptionScheme::encrypt(&account, 0, &shared_secret, &commitment, 2);
+        let ciphertext = EncryptionScheme::encrypt(
+            &account,
+            &PrivateAccountKind::Regular(0),
+            &shared_secret,
+            &commitment,
+            2,
+        );
         let encrypted_account_data =
             EncryptedAccountData::new(ciphertext.clone(), &npk, &vpk, epk.clone());
 
diff --git a/nssa/src/privacy_preserving_transaction/witness_set.rs b/nssa/src/privacy_preserving_transaction/witness_set.rs
index 43a36671..20f4c7ca 100644
--- a/nssa/src/privacy_preserving_transaction/witness_set.rs
+++ b/nssa/src/privacy_preserving_transaction/witness_set.rs
@@ -15,7 +15,7 @@ impl WitnessSet {
     #[must_use]
     // TODO: swap for Keycard signing path.
     pub fn for_message(message: &Message, proof: Proof, private_keys: &[&PrivateKey]) -> Self {
-        let message_hash = message.hash_message();
+        let message_hash = message.hash();
         let signatures_and_public_keys = private_keys
             .iter()
             .map(|&key| {
@@ -49,7 +49,7 @@ impl WitnessSet {
 
     #[must_use]
     pub fn signatures_are_valid_for(&self, message: &Message) -> bool {
-        let message_hash = message.hash_message();
+        let message_hash = message.hash();
         for (signature, public_key) in self.signatures_and_public_keys() {
             if !signature.is_valid_for(&message_hash, public_key) {
                 return false;
diff --git a/nssa/src/program.rs b/nssa/src/program.rs
index b8c3fe77..059aa5ca 100644
--- a/nssa/src/program.rs
+++ b/nssa/src/program.rs
@@ -312,6 +312,16 @@ mod tests {
             }
         }
 
+        #[must_use]
+        pub fn auth_transfer_proxy() -> Self {
+            use test_program_methods::{AUTH_TRANSFER_PROXY_ELF, AUTH_TRANSFER_PROXY_ID};
+
+            Self {
+                id: AUTH_TRANSFER_PROXY_ID,
+                elf: AUTH_TRANSFER_PROXY_ELF.to_vec(),
+            }
+        }
+
         #[must_use]
         pub fn two_pda_claimer() -> Self {
             use test_program_methods::{TWO_PDA_CLAIMER_ELF, TWO_PDA_CLAIMER_ID};
@@ -322,6 +332,16 @@ mod tests {
             }
         }
 
+        #[must_use]
+        pub fn pda_fund_spend_proxy() -> Self {
+            use test_program_methods::{PDA_FUND_SPEND_PROXY_ELF, PDA_FUND_SPEND_PROXY_ID};
+
+            Self {
+                id: PDA_FUND_SPEND_PROXY_ID,
+                elf: PDA_FUND_SPEND_PROXY_ELF.to_vec(),
+            }
+        }
+
         #[must_use]
         pub fn changer_claimer() -> Self {
             use test_program_methods::{CHANGER_CLAIMER_ELF, CHANGER_CLAIMER_ID};
diff --git a/nssa/src/public_transaction/message.rs b/nssa/src/public_transaction/message.rs
index f71fb372..3ab7d74c 100644
--- a/nssa/src/public_transaction/message.rs
+++ b/nssa/src/public_transaction/message.rs
@@ -68,7 +68,7 @@ impl Message {
     }
 
     #[must_use]
-    pub fn hash_message(&self) -> [u8; 32] {
+    pub fn hash(&self) -> [u8; 32] {
         let mut bytes = Vec::with_capacity(
             PREFIX
                 .len()
@@ -90,7 +90,7 @@ mod tests {
     use super::{Message, PREFIX};
 
     #[test]
-    fn hash_message_public_pinned() {
+    fn hash_public_pinned() {
         let msg = Message::new_preserialized(
             [1_u32; 8],
             vec![AccountId::new([42_u8; 32])],
@@ -122,7 +122,7 @@ mod tests {
         assert_eq!(
             borsh::to_vec(&msg).unwrap(),
             expected_borsh,
-            "`public_transaction::hash_message()`: expected borsh order has changed"
+            "`public_transaction::hash()`: expected borsh order has changed"
         );
 
         let mut preimage = Vec::with_capacity(PREFIX.len() + expected_borsh.len());
@@ -131,9 +131,9 @@ mod tests {
         let expected_hash: [u8; 32] = Sha256::digest(&preimage).into();
 
         assert_eq!(
-            msg.hash_message(),
+            msg.hash(),
             expected_hash,
-            "`public_transaction::hash_message()`: serialization has changed"
+            "`public_transaction::hash()`: serialization has changed"
         );
     }
 }
diff --git a/nssa/src/public_transaction/witness_set.rs b/nssa/src/public_transaction/witness_set.rs
index 7a32c0ea..f5721091 100644
--- a/nssa/src/public_transaction/witness_set.rs
+++ b/nssa/src/public_transaction/witness_set.rs
@@ -41,7 +41,7 @@ impl WitnessSet {
 
     #[must_use]
     pub fn for_message(message: &Message, private_keys: &[&PrivateKey]) -> Self {
-        let message_hash = message.hash_message();
+        let message_hash = message.hash();
         let signatures_and_public_keys = private_keys
             .iter()
             .map(|&key| {
@@ -58,7 +58,7 @@ impl WitnessSet {
 
     #[must_use]
     pub fn is_valid_for(&self, message: &Message) -> bool {
-        let message_hash = message.hash_message();
+        let message_hash = message.hash();
         for (signature, public_key) in self.signatures_and_public_keys() {
             if !signature.is_valid_for(&message_hash, public_key) {
                 return false;
@@ -173,7 +173,7 @@ mod tests {
 
         assert_eq!(witness_set.signatures_and_public_keys.len(), 2);
 
-        let message_bytes = message.hash_message();
+        let message_bytes = message.hash();
         for ((signature, public_key), expected_public_key) in witness_set
             .signatures_and_public_keys
             .into_iter()
diff --git a/nssa/src/signature/mod.rs b/nssa/src/signature/mod.rs
index 19daca2e..a46b1ff5 100644
--- a/nssa/src/signature/mod.rs
+++ b/nssa/src/signature/mod.rs
@@ -36,9 +36,9 @@ impl FromStr for Signature {
 }
 
 impl Signature {
-    #[must_use]
     /// This function expects the incoming message to be prehashed to be pre-2022 BIP-340/Keycard
     /// compatible.
+    #[must_use]
     pub fn new(key: &PrivateKey, message: &[u8; 32]) -> Self {
         let mut aux_random = [0_u8; 32];
         OsRng.fill_bytes(&mut aux_random);
diff --git a/nssa/src/state.rs b/nssa/src/state.rs
index ff16175c..8cf1d68e 100644
--- a/nssa/src/state.rs
+++ b/nssa/src/state.rs
@@ -362,8 +362,8 @@ pub mod tests {
     use std::collections::HashMap;
 
     use nssa_core::{
-        BlockId, Commitment, Nullifier, NullifierPublicKey, NullifierSecretKey, SharedSecretKey,
-        Timestamp,
+        BlockId, Commitment, InputAccountIdentity, Nullifier, NullifierPublicKey,
+        NullifierSecretKey, SharedSecretKey, Timestamp,
         account::{Account, AccountId, AccountWithMetadata, Nonce, data::Data},
         encryption::{EphemeralPublicKey, Scalar, ViewingPublicKey},
         program::{
@@ -459,7 +459,7 @@ pub mod tests {
 
         #[must_use]
         pub fn with_private_account(mut self, keys: &TestPrivateKeys, account: &Account) -> Self {
-            let account_id = AccountId::from((&keys.npk(), 0));
+            let account_id = AccountId::for_regular_private_account(&keys.npk(), 0);
             let commitment = Commitment::new(&account_id, account);
             self.private_state.0.extend(&[commitment]);
             self
@@ -618,8 +618,8 @@ pub mod tests {
             ..Account::default()
         };
 
-        let account_id1 = AccountId::from((&keys1.npk(), 0));
-        let account_id2 = AccountId::from((&keys2.npk(), 0));
+        let account_id1 = AccountId::for_regular_private_account(&keys1.npk(), 0);
+        let account_id2 = AccountId::for_regular_private_account(&keys2.npk(), 0);
 
         let init_commitment1 = Commitment::new(&account_id1, &account);
         let init_commitment2 = Commitment::new(&account_id2, &account);
@@ -1256,6 +1256,12 @@ pub mod tests {
         }
     }
 
+    fn test_public_account_keys_2() -> TestPublicKeys {
+        TestPublicKeys {
+            signing_key: PrivateKey::try_new([38; 32]).unwrap(),
+        }
+    }
+
     pub fn test_private_account_keys_1() -> TestPrivateKeys {
         TestPrivateKeys {
             nsk: [13; 32],
@@ -1294,10 +1300,14 @@ pub mod tests {
         let (output, proof) = circuit::execute_and_prove(
             vec![sender, recipient],
             Program::serialize_instruction(balance_to_move).unwrap(),
-            vec![0, 2],
-            vec![(recipient_keys.npk(), 0, shared_secret)],
-            vec![],
-            vec![None],
+            vec![
+                InputAccountIdentity::Public,
+                InputAccountIdentity::PrivateUnauthorized {
+                    npk: recipient_keys.npk(),
+                    ssk: shared_secret,
+                    identifier: 0,
+                },
+            ],
             &Program::authenticated_transfer_program().into(),
         )
         .unwrap();
@@ -1322,7 +1332,7 @@ pub mod tests {
         state: &V03State,
     ) -> PrivacyPreservingTransaction {
         let program = Program::authenticated_transfer_program();
-        let sender_account_id = AccountId::from((&sender_keys.npk(), 0));
+        let sender_account_id = AccountId::for_regular_private_account(&sender_keys.npk(), 0);
         let sender_commitment = Commitment::new(&sender_account_id, sender_private_account);
         let sender_pre = AccountWithMetadata::new(
             sender_private_account.clone(),
@@ -1343,13 +1353,21 @@ pub mod tests {
         let (output, proof) = circuit::execute_and_prove(
             vec![sender_pre, recipient_pre],
             Program::serialize_instruction(balance_to_move).unwrap(),
-            vec![1, 2],
             vec![
-                (sender_keys.npk(), 0, shared_secret_1),
-                (recipient_keys.npk(), 0, shared_secret_2),
+                InputAccountIdentity::PrivateAuthorizedUpdate {
+                    ssk: shared_secret_1,
+                    nsk: sender_keys.nsk,
+                    membership_proof: state
+                        .get_proof_for_commitment(&sender_commitment)
+                        .expect("sender's commitment must be in state"),
+                    identifier: 0,
+                },
+                InputAccountIdentity::PrivateUnauthorized {
+                    npk: recipient_keys.npk(),
+                    ssk: shared_secret_2,
+                    identifier: 0,
+                },
             ],
-            vec![sender_keys.nsk],
-            vec![state.get_proof_for_commitment(&sender_commitment), None],
             &program.into(),
         )
         .unwrap();
@@ -1378,7 +1396,7 @@ pub mod tests {
         state: &V03State,
     ) -> PrivacyPreservingTransaction {
         let program = Program::authenticated_transfer_program();
-        let sender_account_id = AccountId::from((&sender_keys.npk(), 0));
+        let sender_account_id = AccountId::for_regular_private_account(&sender_keys.npk(), 0);
         let sender_commitment = Commitment::new(&sender_account_id, sender_private_account);
         let sender_pre = AccountWithMetadata::new(
             sender_private_account.clone(),
@@ -1398,10 +1416,17 @@ pub mod tests {
         let (output, proof) = circuit::execute_and_prove(
             vec![sender_pre, recipient_pre],
             Program::serialize_instruction(balance_to_move).unwrap(),
-            vec![1, 0],
-            vec![(sender_keys.npk(), 0, shared_secret)],
-            vec![sender_keys.nsk],
-            vec![state.get_proof_for_commitment(&sender_commitment)],
+            vec![
+                InputAccountIdentity::PrivateAuthorizedUpdate {
+                    ssk: shared_secret,
+                    nsk: sender_keys.nsk,
+                    membership_proof: state
+                        .get_proof_for_commitment(&sender_commitment)
+                        .expect("sender's commitment must be in state"),
+                    identifier: 0,
+                },
+                InputAccountIdentity::Public,
+            ],
             &program.into(),
         )
         .unwrap();
@@ -1486,8 +1511,8 @@ pub mod tests {
             &state,
         );
 
-        let sender_account_id = AccountId::from((&sender_keys.npk(), 0));
-        let recipient_account_id = AccountId::from((&recipient_keys.npk(), 0));
+        let sender_account_id = AccountId::for_regular_private_account(&sender_keys.npk(), 0);
+        let recipient_account_id = AccountId::for_regular_private_account(&recipient_keys.npk(), 0);
         let expected_new_commitment_1 = Commitment::new(
             &sender_account_id,
             &Account {
@@ -1565,7 +1590,7 @@ pub mod tests {
             &state,
         );
 
-        let sender_account_id = AccountId::from((&sender_keys.npk(), 0));
+        let sender_account_id = AccountId::for_regular_private_account(&sender_keys.npk(), 0);
         let expected_new_commitment = Commitment::new(
             &sender_account_id,
             &Account {
@@ -1615,10 +1640,7 @@ pub mod tests {
         let result = execute_and_prove(
             vec![public_account],
             Program::serialize_instruction(10_u128).unwrap(),
-            vec![0],
-            vec![],
-            vec![],
-            vec![],
+            vec![InputAccountIdentity::Public],
             &program.into(),
         );
 
@@ -1641,10 +1663,7 @@ pub mod tests {
         let result = execute_and_prove(
             vec![public_account],
             Program::serialize_instruction(10_u128).unwrap(),
-            vec![0],
-            vec![],
-            vec![],
-            vec![],
+            vec![InputAccountIdentity::Public],
             &program.into(),
         );
 
@@ -1667,10 +1686,7 @@ pub mod tests {
         let result = execute_and_prove(
             vec![public_account],
             Program::serialize_instruction(()).unwrap(),
-            vec![0],
-            vec![],
-            vec![],
-            vec![],
+            vec![InputAccountIdentity::Public],
             &program.into(),
         );
 
@@ -1693,10 +1709,7 @@ pub mod tests {
         let result = execute_and_prove(
             vec![public_account],
             Program::serialize_instruction(vec![0]).unwrap(),
-            vec![0],
-            vec![],
-            vec![],
-            vec![],
+            vec![InputAccountIdentity::Public],
             &program.into(),
         );
 
@@ -1727,10 +1740,7 @@ pub mod tests {
         let result = execute_and_prove(
             vec![public_account],
             Program::serialize_instruction(large_data).unwrap(),
-            vec![0],
-            vec![],
-            vec![],
-            vec![],
+            vec![InputAccountIdentity::Public],
             &program.into(),
         );
 
@@ -1753,10 +1763,7 @@ pub mod tests {
         let result = execute_and_prove(
             vec![public_account],
             Program::serialize_instruction(()).unwrap(),
-            vec![0],
-            vec![],
-            vec![],
-            vec![],
+            vec![InputAccountIdentity::Public],
             &program.into(),
         );
 
@@ -1788,10 +1795,7 @@ pub mod tests {
         let result = execute_and_prove(
             vec![public_account_1, public_account_2],
             Program::serialize_instruction(()).unwrap(),
-            vec![0, 0],
-            vec![],
-            vec![],
-            vec![],
+            vec![InputAccountIdentity::Public, InputAccountIdentity::Public],
             &program.into(),
         );
 
@@ -1814,10 +1818,7 @@ pub mod tests {
         let result = execute_and_prove(
             vec![public_account],
             Program::serialize_instruction(()).unwrap(),
-            vec![0],
-            vec![],
-            vec![],
-            vec![],
+            vec![InputAccountIdentity::Public],
             &program.into(),
         );
 
@@ -1849,10 +1850,7 @@ pub mod tests {
         let result = execute_and_prove(
             vec![public_account_1, public_account_2],
             Program::serialize_instruction(10_u128).unwrap(),
-            vec![0, 0],
-            vec![],
-            vec![],
-            vec![],
+            vec![InputAccountIdentity::Public, InputAccountIdentity::Public],
             &program.into(),
         );
 
@@ -1881,177 +1879,11 @@ pub mod tests {
             AccountId::new([1; 32]),
         );
 
-        // Setting only one visibility mask for a circuit execution with two pre_state accounts.
-        let visibility_mask = [0];
+        // Single account_identity entry for a circuit execution with two pre_state accounts.
         let result = execute_and_prove(
             vec![public_account_1, public_account_2],
             Program::serialize_instruction(10_u128).unwrap(),
-            visibility_mask.to_vec(),
-            vec![],
-            vec![],
-            vec![],
-            &program.into(),
-        );
-
-        assert!(matches!(result, Err(NssaError::CircuitProvingError(_))));
-    }
-
-    #[test]
-    fn circuit_fails_if_insufficient_nonces_are_provided() {
-        let program = Program::simple_balance_transfer();
-        let sender_keys = test_private_account_keys_1();
-        let recipient_keys = test_private_account_keys_2();
-        let private_account_1 = AccountWithMetadata::new(
-            Account {
-                program_owner: program.id(),
-                balance: 100,
-                ..Account::default()
-            },
-            true,
-            (&sender_keys.npk(), 0),
-        );
-        let private_account_2 =
-            AccountWithMetadata::new(Account::default(), false, (&recipient_keys.npk(), 0));
-
-        let result = execute_and_prove(
-            vec![private_account_1, private_account_2],
-            Program::serialize_instruction(10_u128).unwrap(),
-            vec![1, 2],
-            vec![
-                (
-                    sender_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
-                ),
-                (
-                    recipient_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[56; 32], &recipient_keys.vpk()),
-                ),
-            ],
-            vec![sender_keys.nsk],
-            vec![Some((0, vec![]))],
-            &program.into(),
-        );
-
-        assert!(matches!(result, Err(NssaError::CircuitProvingError(_))));
-    }
-
-    #[test]
-    fn circuit_fails_if_insufficient_keys_are_provided() {
-        let program = Program::simple_balance_transfer();
-        let sender_keys = test_private_account_keys_1();
-        let private_account_1 = AccountWithMetadata::new(
-            Account {
-                program_owner: program.id(),
-                balance: 100,
-                ..Account::default()
-            },
-            true,
-            (&sender_keys.npk(), 0),
-        );
-        let private_account_2 =
-            AccountWithMetadata::new(Account::default(), false, AccountId::new([1; 32]));
-
-        // Setting only one key for an execution with two private accounts.
-        let private_account_keys = [(
-            sender_keys.npk(),
-            0,
-            SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
-        )];
-        let result = execute_and_prove(
-            vec![private_account_1, private_account_2],
-            Program::serialize_instruction(10_u128).unwrap(),
-            vec![1, 2],
-            private_account_keys.to_vec(),
-            vec![sender_keys.nsk],
-            vec![Some((0, vec![]))],
-            &program.into(),
-        );
-
-        assert!(matches!(result, Err(NssaError::CircuitProvingError(_))));
-    }
-
-    #[test]
-    fn circuit_fails_if_insufficient_commitment_proofs_are_provided() {
-        let program = Program::simple_balance_transfer();
-        let sender_keys = test_private_account_keys_1();
-        let recipient_keys = test_private_account_keys_2();
-        let private_account_1 = AccountWithMetadata::new(
-            Account {
-                program_owner: program.id(),
-                balance: 100,
-                ..Account::default()
-            },
-            true,
-            (&sender_keys.npk(), 0),
-        );
-        let private_account_2 =
-            AccountWithMetadata::new(Account::default(), false, (&recipient_keys.npk(), 0));
-
-        // Setting no second commitment proof.
-        let private_account_membership_proofs = [Some((0, vec![]))];
-        let result = execute_and_prove(
-            vec![private_account_1, private_account_2],
-            Program::serialize_instruction(10_u128).unwrap(),
-            vec![1, 2],
-            vec![
-                (
-                    sender_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
-                ),
-                (
-                    recipient_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[56; 32], &recipient_keys.vpk()),
-                ),
-            ],
-            vec![sender_keys.nsk],
-            private_account_membership_proofs.to_vec(),
-            &program.into(),
-        );
-
-        assert!(matches!(result, Err(NssaError::CircuitProvingError(_))));
-    }
-
-    #[test]
-    fn circuit_fails_if_insufficient_auth_keys_are_provided() {
-        let program = Program::simple_balance_transfer();
-        let sender_keys = test_private_account_keys_1();
-        let recipient_keys = test_private_account_keys_2();
-        let private_account_1 = AccountWithMetadata::new(
-            Account {
-                program_owner: program.id(),
-                balance: 100,
-                ..Account::default()
-            },
-            true,
-            (&sender_keys.npk(), 0),
-        );
-        let private_account_2 =
-            AccountWithMetadata::new(Account::default(), false, (&recipient_keys.npk(), 0));
-
-        // Setting no auth key for an execution with one non default private accounts.
-        let private_account_nsks = [];
-        let result = execute_and_prove(
-            vec![private_account_1, private_account_2],
-            Program::serialize_instruction(10_u128).unwrap(),
-            vec![1, 2],
-            vec![
-                (
-                    sender_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
-                ),
-                (
-                    recipient_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[56; 32], &recipient_keys.vpk()),
-                ),
-            ],
-            private_account_nsks.to_vec(),
-            vec![],
+            vec![InputAccountIdentity::Public],
             &program.into(),
         );
 
@@ -2075,33 +1907,26 @@ pub mod tests {
         let private_account_2 =
             AccountWithMetadata::new(Account::default(), false, (&recipient_keys.npk(), 0));
 
-        let private_account_keys = [
-            // First private account is the sender
-            (
-                sender_keys.npk(),
-                0,
-                SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
-            ),
-            // Second private account is the recipient
-            (
-                recipient_keys.npk(),
-                0,
-                SharedSecretKey::new(&[56; 32], &recipient_keys.vpk()),
-            ),
-        ];
-
-        // Setting the recipient key to authorize the sender.
-        // This should be set to the sender private account in
-        // a normal circumstance. The recipient can't authorize this.
-        let private_account_nsks = [recipient_keys.nsk];
-        let private_account_membership_proofs = [Some((0, vec![]))];
+        // Setting the recipient nsk to authorize the sender.
+        // This should be set to the sender private account in a normal circumstance.
+        // `PrivateAuthorizedUpdate` derives npk from nsk and asserts equality with
+        // `pre_state.account_id`, so a mismatched nsk fails that check.
         let result = execute_and_prove(
             vec![private_account_1, private_account_2],
             Program::serialize_instruction(10_u128).unwrap(),
-            vec![1, 2],
-            private_account_keys.to_vec(),
-            private_account_nsks.to_vec(),
-            private_account_membership_proofs.to_vec(),
+            vec![
+                InputAccountIdentity::PrivateAuthorizedUpdate {
+                    ssk: SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
+                    nsk: recipient_keys.nsk,
+                    membership_proof: (0, vec![]),
+                    identifier: 0,
+                },
+                InputAccountIdentity::PrivateUnauthorized {
+                    npk: recipient_keys.npk(),
+                    ssk: SharedSecretKey::new(&[56; 32], &recipient_keys.vpk()),
+                    identifier: 0,
+                },
+            ],
             &program.into(),
         );
 
@@ -2135,21 +1960,19 @@ pub mod tests {
         let result = execute_and_prove(
             vec![private_account_1, private_account_2],
             Program::serialize_instruction(10_u128).unwrap(),
-            vec![1, 2],
             vec![
-                (
-                    sender_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
-                ),
-                (
-                    recipient_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[56; 32], &recipient_keys.vpk()),
-                ),
+                InputAccountIdentity::PrivateAuthorizedUpdate {
+                    ssk: SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
+                    nsk: sender_keys.nsk,
+                    membership_proof: (0, vec![]),
+                    identifier: 0,
+                },
+                InputAccountIdentity::PrivateUnauthorized {
+                    npk: recipient_keys.npk(),
+                    ssk: SharedSecretKey::new(&[56; 32], &recipient_keys.vpk()),
+                    identifier: 0,
+                },
             ],
-            vec![sender_keys.nsk],
-            vec![Some((0, vec![]))],
             &program.into(),
         );
 
@@ -2183,21 +2006,19 @@ pub mod tests {
         let result = execute_and_prove(
             vec![private_account_1, private_account_2],
             Program::serialize_instruction(10_u128).unwrap(),
-            vec![1, 2],
             vec![
-                (
-                    sender_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
-                ),
-                (
-                    recipient_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[56; 32], &recipient_keys.vpk()),
-                ),
+                InputAccountIdentity::PrivateAuthorizedUpdate {
+                    ssk: SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
+                    nsk: sender_keys.nsk,
+                    membership_proof: (0, vec![]),
+                    identifier: 0,
+                },
+                InputAccountIdentity::PrivateUnauthorized {
+                    npk: recipient_keys.npk(),
+                    ssk: SharedSecretKey::new(&[56; 32], &recipient_keys.vpk()),
+                    identifier: 0,
+                },
             ],
-            vec![sender_keys.nsk],
-            vec![Some((0, vec![]))],
             &program.into(),
         );
 
@@ -2231,21 +2052,19 @@ pub mod tests {
         let result = execute_and_prove(
             vec![private_account_1, private_account_2],
             Program::serialize_instruction(10_u128).unwrap(),
-            vec![1, 2],
             vec![
-                (
-                    sender_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
-                ),
-                (
-                    recipient_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[56; 32], &recipient_keys.vpk()),
-                ),
+                InputAccountIdentity::PrivateAuthorizedUpdate {
+                    ssk: SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
+                    nsk: sender_keys.nsk,
+                    membership_proof: (0, vec![]),
+                    identifier: 0,
+                },
+                InputAccountIdentity::PrivateUnauthorized {
+                    npk: recipient_keys.npk(),
+                    ssk: SharedSecretKey::new(&[56; 32], &recipient_keys.vpk()),
+                    identifier: 0,
+                },
             ],
-            vec![sender_keys.nsk],
-            vec![Some((0, vec![]))],
             &program.into(),
         );
 
@@ -2279,21 +2098,19 @@ pub mod tests {
         let result = execute_and_prove(
             vec![private_account_1, private_account_2],
             Program::serialize_instruction(10_u128).unwrap(),
-            vec![1, 2],
             vec![
-                (
-                    sender_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
-                ),
-                (
-                    recipient_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[56; 32], &recipient_keys.vpk()),
-                ),
+                InputAccountIdentity::PrivateAuthorizedUpdate {
+                    ssk: SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
+                    nsk: sender_keys.nsk,
+                    membership_proof: (0, vec![]),
+                    identifier: 0,
+                },
+                InputAccountIdentity::PrivateUnauthorized {
+                    npk: recipient_keys.npk(),
+                    ssk: SharedSecretKey::new(&[56; 32], &recipient_keys.vpk()),
+                    identifier: 0,
+                },
             ],
-            vec![sender_keys.nsk],
-            vec![Some((0, vec![]))],
             &program.into(),
         );
 
@@ -2325,21 +2142,19 @@ pub mod tests {
         let result = execute_and_prove(
             vec![private_account_1, private_account_2],
             Program::serialize_instruction(10_u128).unwrap(),
-            vec![1, 2],
             vec![
-                (
-                    sender_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
-                ),
-                (
-                    recipient_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[56; 32], &recipient_keys.vpk()),
-                ),
+                InputAccountIdentity::PrivateAuthorizedUpdate {
+                    ssk: SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
+                    nsk: sender_keys.nsk,
+                    membership_proof: (0, vec![]),
+                    identifier: 0,
+                },
+                InputAccountIdentity::PrivateUnauthorized {
+                    npk: recipient_keys.npk(),
+                    ssk: SharedSecretKey::new(&[56; 32], &recipient_keys.vpk()),
+                    identifier: 0,
+                },
             ],
-            vec![sender_keys.nsk],
-            vec![Some((0, vec![]))],
             &program.into(),
         );
 
@@ -2368,14 +2183,17 @@ pub mod tests {
         let private_pda_account =
             AccountWithMetadata::new(Account::default(), false, AccountId::new([1; 32]));
 
-        let visibility_mask = [0, 3];
         let result = execute_and_prove(
             vec![public_account_1, private_pda_account],
             Program::serialize_instruction(10_u128).unwrap(),
-            visibility_mask.to_vec(),
-            vec![(npk, 0, shared_secret)],
-            vec![],
-            vec![None],
+            vec![
+                InputAccountIdentity::Public,
+                InputAccountIdentity::PrivatePdaInit {
+                    npk,
+                    ssk: shared_secret,
+                    identifier: u128::MAX,
+                },
+            ],
             &program.into(),
         );
 
@@ -2395,16 +2213,17 @@ pub mod tests {
         let seed = PdaSeed::new([42; 32]);
         let shared_secret = SharedSecretKey::new(&[55; 32], &keys.vpk());
 
-        let account_id = AccountId::for_private_pda(&program.id(), &seed, &npk);
+        let account_id = AccountId::for_private_pda(&program.id(), &seed, &npk, u128::MAX);
         let pre_state = AccountWithMetadata::new(Account::default(), false, account_id);
 
         let result = execute_and_prove(
             vec![pre_state],
             Program::serialize_instruction(seed).unwrap(),
-            vec![3],
-            vec![(npk, u128::MAX, shared_secret)],
-            vec![],
-            vec![None],
+            vec![InputAccountIdentity::PrivatePdaInit {
+                npk,
+                ssk: shared_secret,
+                identifier: u128::MAX,
+            }],
             &program.into(),
         );
 
@@ -2433,16 +2252,17 @@ pub mod tests {
         // `account_id` is derived from `npk_a`, but `npk_b` is supplied for this pre_state.
         // `AccountId::for_private_pda(program, seed, npk_b) != account_id`, so the claim check in
         // the circuit must reject.
-        let account_id = AccountId::for_private_pda(&program.id(), &seed, &npk_a);
+        let account_id = AccountId::for_private_pda(&program.id(), &seed, &npk_a, u128::MAX);
         let pre_state = AccountWithMetadata::new(Account::default(), false, account_id);
 
         let result = execute_and_prove(
             vec![pre_state],
             Program::serialize_instruction(seed).unwrap(),
-            vec![3],
-            vec![(npk_b, 0, shared_secret)],
-            vec![],
-            vec![None],
+            vec![InputAccountIdentity::PrivatePdaInit {
+                npk: npk_b,
+                ssk: shared_secret,
+                identifier: u128::MAX,
+            }],
             &program.into(),
         );
 
@@ -2463,7 +2283,7 @@ pub mod tests {
         let seed = PdaSeed::new([77; 32]);
         let shared_secret = SharedSecretKey::new(&[55; 32], &keys.vpk());
 
-        let account_id = AccountId::for_private_pda(&delegator.id(), &seed, &npk);
+        let account_id = AccountId::for_private_pda(&delegator.id(), &seed, &npk, u128::MAX);
         let pre_state = AccountWithMetadata::new(Account::default(), false, account_id);
 
         let callee_id = callee.id();
@@ -2473,10 +2293,11 @@ pub mod tests {
         let result = execute_and_prove(
             vec![pre_state],
             Program::serialize_instruction((seed, seed, callee_id)).unwrap(),
-            vec![3],
-            vec![(npk, u128::MAX, shared_secret)],
-            vec![],
-            vec![None],
+            vec![InputAccountIdentity::PrivatePdaInit {
+                npk,
+                ssk: shared_secret,
+                identifier: u128::MAX,
+            }],
             &program_with_deps,
         );
 
@@ -2500,7 +2321,7 @@ pub mod tests {
         let wrong_delegated_seed = PdaSeed::new([88; 32]);
         let shared_secret = SharedSecretKey::new(&[55; 32], &keys.vpk());
 
-        let account_id = AccountId::for_private_pda(&delegator.id(), &claim_seed, &npk);
+        let account_id = AccountId::for_private_pda(&delegator.id(), &claim_seed, &npk, u128::MAX);
         let pre_state = AccountWithMetadata::new(Account::default(), false, account_id);
 
         let callee_id = callee.id();
@@ -2510,10 +2331,11 @@ pub mod tests {
         let result = execute_and_prove(
             vec![pre_state],
             Program::serialize_instruction((claim_seed, wrong_delegated_seed, callee_id)).unwrap(),
-            vec![3],
-            vec![(npk, 0, shared_secret)],
-            vec![],
-            vec![None],
+            vec![InputAccountIdentity::PrivatePdaInit {
+                npk,
+                ssk: shared_secret,
+                identifier: u128::MAX,
+            }],
             &program_with_deps,
         );
 
@@ -2537,8 +2359,8 @@ pub mod tests {
         let shared_a = SharedSecretKey::new(&[66; 32], &keys_a.vpk());
         let shared_b = SharedSecretKey::new(&[77; 32], &keys_b.vpk());
 
-        let account_a = AccountId::for_private_pda(&program.id(), &seed, &keys_a.npk());
-        let account_b = AccountId::for_private_pda(&program.id(), &seed, &keys_b.npk());
+        let account_a = AccountId::for_private_pda(&program.id(), &seed, &keys_a.npk(), u128::MAX);
+        let account_b = AccountId::for_private_pda(&program.id(), &seed, &keys_b.npk(), u128::MAX);
 
         let pre_a = AccountWithMetadata::new(Account::default(), false, account_a);
         let pre_b = AccountWithMetadata::new(Account::default(), false, account_b);
@@ -2546,10 +2368,18 @@ pub mod tests {
         let result = execute_and_prove(
             vec![pre_a, pre_b],
             Program::serialize_instruction(seed).unwrap(),
-            vec![3, 3],
-            vec![(keys_a.npk(), 0, shared_a), (keys_b.npk(), 0, shared_b)],
-            vec![],
-            vec![None, None],
+            vec![
+                InputAccountIdentity::PrivatePdaInit {
+                    npk: keys_a.npk(),
+                    ssk: shared_a,
+                    identifier: u128::MAX,
+                },
+                InputAccountIdentity::PrivatePdaInit {
+                    npk: keys_b.npk(),
+                    ssk: shared_b,
+                    identifier: u128::MAX,
+                },
+            ],
             &program.into(),
         );
 
@@ -2577,7 +2407,7 @@ pub mod tests {
 
         // Simulate a previously-claimed private PDA: program_owner != DEFAULT, is_authorized =
         // true, account_id derived via the private formula.
-        let account_id = AccountId::for_private_pda(&program.id(), &seed, &npk);
+        let account_id = AccountId::for_private_pda(&program.id(), &seed, &npk, u128::MAX);
         let owned_pre_state = AccountWithMetadata::new(
             Account {
                 program_owner: program.id(),
@@ -2590,146 +2420,11 @@ pub mod tests {
         let result = execute_and_prove(
             vec![owned_pre_state],
             Program::serialize_instruction(()).unwrap(),
-            vec![3],
-            vec![(npk, 0, shared_secret)],
-            vec![],
-            vec![None],
-            &program.into(),
-        );
-
-        assert!(matches!(result, Err(NssaError::CircuitProvingError(_))));
-    }
-
-    #[test]
-    fn circuit_should_fail_with_too_many_nonces() {
-        let program = Program::simple_balance_transfer();
-        let sender_keys = test_private_account_keys_1();
-        let recipient_keys = test_private_account_keys_2();
-        let private_account_1 = AccountWithMetadata::new(
-            Account {
-                program_owner: program.id(),
-                balance: 100,
-                ..Account::default()
-            },
-            true,
-            (&sender_keys.npk(), 0),
-        );
-        let private_account_2 =
-            AccountWithMetadata::new(Account::default(), false, (&recipient_keys.npk(), 0));
-
-        let result = execute_and_prove(
-            vec![private_account_1, private_account_2],
-            Program::serialize_instruction(10_u128).unwrap(),
-            vec![1, 2],
-            vec![
-                (
-                    sender_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
-                ),
-                (
-                    recipient_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[56; 32], &recipient_keys.vpk()),
-                ),
-            ],
-            vec![sender_keys.nsk],
-            vec![Some((0, vec![]))],
-            &program.into(),
-        );
-
-        assert!(matches!(result, Err(NssaError::CircuitProvingError(_))));
-    }
-
-    #[test]
-    fn circuit_should_fail_with_too_many_private_account_keys() {
-        let program = Program::simple_balance_transfer();
-        let sender_keys = test_private_account_keys_1();
-        let recipient_keys = test_private_account_keys_2();
-        let private_account_1 = AccountWithMetadata::new(
-            Account {
-                program_owner: program.id(),
-                balance: 100,
-                ..Account::default()
-            },
-            true,
-            (&sender_keys.npk(), 0),
-        );
-        let private_account_2 =
-            AccountWithMetadata::new(Account::default(), false, (&recipient_keys.npk(), 0));
-
-        // Setting three private account keys for a circuit execution with only two private
-        // accounts.
-        let private_account_keys = [
-            (
-                sender_keys.npk(),
-                0,
-                SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
-            ),
-            (
-                recipient_keys.npk(),
-                0,
-                SharedSecretKey::new(&[56; 32], &recipient_keys.vpk()),
-            ),
-            (
-                sender_keys.npk(),
-                0,
-                SharedSecretKey::new(&[57; 32], &sender_keys.vpk()),
-            ),
-        ];
-        let result = execute_and_prove(
-            vec![private_account_1, private_account_2],
-            Program::serialize_instruction(10_u128).unwrap(),
-            vec![1, 2],
-            private_account_keys.to_vec(),
-            vec![sender_keys.nsk],
-            vec![Some((0, vec![]))],
-            &program.into(),
-        );
-
-        assert!(matches!(result, Err(NssaError::CircuitProvingError(_))));
-    }
-
-    #[test]
-    fn circuit_should_fail_with_too_many_private_account_auth_keys() {
-        let program = Program::simple_balance_transfer();
-        let sender_keys = test_private_account_keys_1();
-        let recipient_keys = test_private_account_keys_2();
-        let private_account_1 = AccountWithMetadata::new(
-            Account {
-                program_owner: program.id(),
-                balance: 100,
-                ..Account::default()
-            },
-            true,
-            (&sender_keys.npk(), 0),
-        );
-        let private_account_2 =
-            AccountWithMetadata::new(Account::default(), false, (&recipient_keys.npk(), 0));
-
-        // Setting two private account keys for a circuit execution with only one non default
-        // private account (visibility mask equal to 1 means that auth keys are expected).
-        let visibility_mask = [1, 2];
-        let private_account_nsks = [sender_keys.nsk, recipient_keys.nsk];
-        let private_account_membership_proofs = [Some((0, vec![])), Some((1, vec![]))];
-        let result = execute_and_prove(
-            vec![private_account_1, private_account_2],
-            Program::serialize_instruction(10_u128).unwrap(),
-            visibility_mask.to_vec(),
-            vec![
-                (
-                    sender_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[55; 32], &sender_keys.vpk()),
-                ),
-                (
-                    recipient_keys.npk(),
-                    0,
-                    SharedSecretKey::new(&[56; 32], &recipient_keys.vpk()),
-                ),
-            ],
-            private_account_nsks.to_vec(),
-            private_account_membership_proofs.to_vec(),
+            vec![InputAccountIdentity::PrivatePdaInit {
+                npk,
+                ssk: shared_secret,
+                identifier: u128::MAX,
+            }],
             &program.into(),
         );
 
@@ -2806,20 +2501,24 @@ pub mod tests {
             (&sender_keys.npk(), 0),
         );
 
-        let visibility_mask = [1, 1];
-        let private_account_nsks = [sender_keys.nsk, sender_keys.nsk];
-        let private_account_membership_proofs = [Some((1, vec![])), Some((1, vec![]))];
         let shared_secret = SharedSecretKey::new(&[55; 32], &sender_keys.vpk());
         let result = execute_and_prove(
             vec![private_account_1.clone(), private_account_1],
             Program::serialize_instruction(100_u128).unwrap(),
-            visibility_mask.to_vec(),
             vec![
-                (sender_keys.npk(), 0, shared_secret),
-                (sender_keys.npk(), 0, shared_secret),
+                InputAccountIdentity::PrivateAuthorizedUpdate {
+                    ssk: shared_secret,
+                    nsk: sender_keys.nsk,
+                    membership_proof: (1, vec![]),
+                    identifier: 0,
+                },
+                InputAccountIdentity::PrivateAuthorizedUpdate {
+                    ssk: shared_secret,
+                    nsk: sender_keys.nsk,
+                    membership_proof: (1, vec![]),
+                    identifier: 0,
+                },
             ],
-            private_account_nsks.to_vec(),
-            private_account_membership_proofs.to_vec(),
             &program.into(),
         );
 
@@ -3110,10 +2809,7 @@ pub mod tests {
         let result = execute_and_prove(
             vec![public_account],
             Program::serialize_instruction(0_u128).unwrap(),
-            vec![0],
-            vec![],
-            vec![],
-            vec![],
+            vec![InputAccountIdentity::Public],
             &program.into(),
         );
 
@@ -3130,7 +2826,7 @@ pub mod tests {
             balance: 100,
             ..Account::default()
         };
-        let sender_account_id = AccountId::from((&sender_keys.npk(), 0));
+        let sender_account_id = AccountId::for_regular_private_account(&sender_keys.npk(), 0);
         let sender_commitment = Commitment::new(&sender_account_id, &sender_private_account);
         let sender_init_nullifier = Nullifier::for_account_initialization(&sender_account_id);
         let mut state = V03State::new_with_genesis_accounts(
@@ -3152,10 +2848,17 @@ pub mod tests {
         let (output, proof) = execute_and_prove(
             vec![sender_pre, recipient_pre],
             Program::serialize_instruction(37_u128).unwrap(),
-            vec![1, 0],
-            vec![(sender_keys.npk(), 0, shared_secret)],
-            vec![sender_keys.nsk],
-            vec![state.get_proof_for_commitment(&sender_commitment)],
+            vec![
+                InputAccountIdentity::PrivateAuthorizedUpdate {
+                    ssk: shared_secret,
+                    nsk: sender_keys.nsk,
+                    membership_proof: state
+                        .get_proof_for_commitment(&sender_commitment)
+                        .expect("sender's commitment must be in state"),
+                    identifier: 0,
+                },
+                InputAccountIdentity::Public,
+            ],
             &program.into(),
         )
         .unwrap();
@@ -3216,8 +2919,8 @@ pub mod tests {
             (&to_keys.npk(), 0),
         );
 
-        let from_account_id = AccountId::from((&from_keys.npk(), 0));
-        let to_account_id = AccountId::from((&to_keys.npk(), 0));
+        let from_account_id = AccountId::for_regular_private_account(&from_keys.npk(), 0);
+        let to_account_id = AccountId::for_regular_private_account(&to_keys.npk(), 0);
         let from_commitment = Commitment::new(&from_account_id, &from_account.account);
         let to_commitment = Commitment::new(&to_account_id, &to_account.account);
         let from_init_nullifier = Nullifier::for_account_initialization(&from_account_id);
@@ -3273,12 +2976,23 @@ pub mod tests {
         let (output, proof) = execute_and_prove(
             vec![to_account, from_account],
             Program::serialize_instruction(instruction).unwrap(),
-            vec![1, 1],
-            vec![(from_keys.npk(), 0, to_ss), (to_keys.npk(), 0, from_ss)],
-            vec![from_keys.nsk, to_keys.nsk],
             vec![
-                state.get_proof_for_commitment(&from_commitment),
-                state.get_proof_for_commitment(&to_commitment),
+                InputAccountIdentity::PrivateAuthorizedUpdate {
+                    ssk: to_ss,
+                    nsk: from_keys.nsk,
+                    membership_proof: state
+                        .get_proof_for_commitment(&from_commitment)
+                        .expect("from's commitment must be in state"),
+                    identifier: 0,
+                },
+                InputAccountIdentity::PrivateAuthorizedUpdate {
+                    ssk: from_ss,
+                    nsk: to_keys.nsk,
+                    membership_proof: state
+                        .get_proof_for_commitment(&to_commitment)
+                        .expect("to's commitment must be in state"),
+                    identifier: 0,
+                },
             ],
             &program_with_deps,
         )
@@ -3542,10 +3256,11 @@ pub mod tests {
         let (output, proof) = execute_and_prove(
             vec![authorized_account],
             Program::serialize_instruction(balance).unwrap(),
-            vec![1],
-            vec![(private_keys.npk(), 0, shared_secret)],
-            vec![private_keys.nsk],
-            vec![None],
+            vec![InputAccountIdentity::PrivateAuthorizedInit {
+                ssk: shared_secret,
+                nsk: private_keys.nsk,
+                identifier: 0,
+            }],
             &program.into(),
         )
         .unwrap();
@@ -3565,7 +3280,7 @@ pub mod tests {
         let result = state.transition_from_privacy_preserving_transaction(&tx, 1, 0);
         assert!(result.is_ok());
 
-        let account_id = AccountId::from((&private_keys.npk(), 0));
+        let account_id = AccountId::for_regular_private_account(&private_keys.npk(), 0);
         let nullifier = Nullifier::for_account_initialization(&account_id);
         assert!(state.private_state.1.contains(&nullifier));
     }
@@ -3590,10 +3305,11 @@ pub mod tests {
         let (output, proof) = execute_and_prove(
             vec![unauthorized_account],
             Program::serialize_instruction(0_u128).unwrap(),
-            vec![2],
-            vec![(private_keys.npk(), 0, shared_secret)],
-            vec![],
-            vec![None],
+            vec![InputAccountIdentity::PrivateUnauthorized {
+                npk: private_keys.npk(),
+                ssk: shared_secret,
+                identifier: 0,
+            }],
             &program.into(),
         )
         .unwrap();
@@ -3613,7 +3329,7 @@ pub mod tests {
             .transition_from_privacy_preserving_transaction(&tx, 1, 0)
             .unwrap();
 
-        let account_id = AccountId::from((&private_keys.npk(), 0));
+        let account_id = AccountId::for_regular_private_account(&private_keys.npk(), 0);
         let nullifier = Nullifier::for_account_initialization(&account_id);
         assert!(state.private_state.1.contains(&nullifier));
     }
@@ -3642,10 +3358,11 @@ pub mod tests {
         let (output, proof) = execute_and_prove(
             vec![authorized_account.clone()],
             Program::serialize_instruction(balance).unwrap(),
-            vec![1],
-            vec![(private_keys.npk(), 0, shared_secret)],
-            vec![private_keys.nsk],
-            vec![None],
+            vec![InputAccountIdentity::PrivateAuthorizedInit {
+                ssk: shared_secret,
+                nsk: private_keys.nsk,
+                identifier: 0,
+            }],
             &claimer_program.into(),
         )
         .unwrap();
@@ -3669,7 +3386,7 @@ pub mod tests {
         );
 
         // Verify the account is now initialized (nullifier exists)
-        let account_id = AccountId::from((&private_keys.npk(), 0));
+        let account_id = AccountId::for_regular_private_account(&private_keys.npk(), 0);
         let nullifier = Nullifier::for_account_initialization(&account_id);
         assert!(state.private_state.1.contains(&nullifier));
 
@@ -3688,10 +3405,11 @@ pub mod tests {
         let res = execute_and_prove(
             vec![account_metadata],
             Program::serialize_instruction(()).unwrap(),
-            vec![1],
-            vec![(private_keys.npk(), 0, shared_secret2)],
-            vec![private_keys.nsk],
-            vec![None],
+            vec![InputAccountIdentity::PrivateAuthorizedInit {
+                ssk: shared_secret2,
+                nsk: private_keys.nsk,
+                identifier: 0,
+            }],
             &noop_program.into(),
         );
 
@@ -3764,14 +3482,12 @@ pub mod tests {
         let result = execute_and_prove(
             vec![private_account],
             Program::serialize_instruction(instruction).unwrap(),
-            vec![1],
-            vec![(
-                sender_keys.npk(),
-                0,
-                SharedSecretKey::new(&[3; 32], &sender_keys.vpk()),
-            )],
-            vec![sender_keys.nsk],
-            vec![Some((0, vec![]))],
+            vec![InputAccountIdentity::PrivateAuthorizedUpdate {
+                ssk: SharedSecretKey::new(&[3; 32], &sender_keys.vpk()),
+                nsk: sender_keys.nsk,
+                membership_proof: (0, vec![]),
+                identifier: 0,
+            }],
             &program.into(),
         );
 
@@ -3792,14 +3508,12 @@ pub mod tests {
         let result = execute_and_prove(
             vec![private_account],
             Program::serialize_instruction(instruction).unwrap(),
-            vec![1],
-            vec![(
-                sender_keys.npk(),
-                0,
-                SharedSecretKey::new(&[3; 32], &sender_keys.vpk()),
-            )],
-            vec![sender_keys.nsk],
-            vec![Some((0, vec![]))],
+            vec![InputAccountIdentity::PrivateAuthorizedUpdate {
+                ssk: SharedSecretKey::new(&[3; 32], &sender_keys.vpk()),
+                nsk: sender_keys.nsk,
+                membership_proof: (0, vec![]),
+                identifier: 0,
+            }],
             &program.into(),
         );
 
@@ -3827,7 +3541,7 @@ pub mod tests {
         let recipient_account =
             AccountWithMetadata::new(Account::default(), true, (&recipient_keys.npk(), 0));
 
-        let recipient_account_id = AccountId::from((&recipient_keys.npk(), 0));
+        let recipient_account_id = AccountId::for_regular_private_account(&recipient_keys.npk(), 0);
         let recipient_commitment =
             Commitment::new(&recipient_account_id, &recipient_account.account);
         let recipient_init_nullifier = Nullifier::for_account_initialization(&recipient_account_id);
@@ -3852,10 +3566,17 @@ pub mod tests {
         let result = execute_and_prove(
             vec![sender_account, recipient_account],
             Program::serialize_instruction(instruction).unwrap(),
-            vec![0, 1],
-            vec![(recipient_keys.npk(), 0, recipient)],
-            vec![recipient_keys.nsk],
-            vec![state.get_proof_for_commitment(&recipient_commitment)],
+            vec![
+                InputAccountIdentity::Public,
+                InputAccountIdentity::PrivateAuthorizedUpdate {
+                    ssk: recipient,
+                    nsk: recipient_keys.nsk,
+                    membership_proof: state
+                        .get_proof_for_commitment(&recipient_commitment)
+                        .expect("recipient's commitment must be in state"),
+                    identifier: 0,
+                },
+            ],
             &program_with_deps,
         );
 
@@ -4002,10 +3723,11 @@ pub mod tests {
             let (output, proof) = circuit::execute_and_prove(
                 vec![pre],
                 Program::serialize_instruction(instruction).unwrap(),
-                vec![2],
-                vec![(account_keys.npk(), 0, shared_secret)],
-                vec![],
-                vec![None],
+                vec![InputAccountIdentity::PrivateUnauthorized {
+                    npk: account_keys.npk(),
+                    ssk: shared_secret,
+                    identifier: 0,
+                }],
                 &validity_window_program.into(),
             )
             .unwrap();
@@ -4071,10 +3793,11 @@ pub mod tests {
             let (output, proof) = circuit::execute_and_prove(
                 vec![pre],
                 Program::serialize_instruction(instruction).unwrap(),
-                vec![2],
-                vec![(account_keys.npk(), 0, shared_secret)],
-                vec![],
-                vec![None],
+                vec![InputAccountIdentity::PrivateUnauthorized {
+                    npk: account_keys.npk(),
+                    ssk: shared_secret,
+                    identifier: 0,
+                }],
                 &validity_window_program.into(),
             )
             .unwrap();
@@ -4577,4 +4300,225 @@ pub mod tests {
             "program with spoofed caller_program_id in output should be rejected"
         );
     }
+
+    #[test]
+    fn two_private_pda_family_members_receive_and_spend() {
+        let funder_keys = test_public_account_keys_1();
+        let alice_keys = test_private_account_keys_1();
+        let alice_npk = alice_keys.npk();
+
+        let proxy = Program::pda_fund_spend_proxy();
+        let auth_transfer = Program::authenticated_transfer_program();
+        let proxy_id = proxy.id();
+        let auth_transfer_id = auth_transfer.id();
+        let seed = PdaSeed::new([42; 32]);
+        let amount: u128 = 100;
+
+        let program_with_deps =
+            ProgramWithDependencies::new(proxy, [(auth_transfer_id, auth_transfer)].into());
+
+        let funder_id = funder_keys.account_id();
+        let alice_pda_0_id = AccountId::for_private_pda(&proxy_id, &seed, &alice_npk, 0);
+        let alice_pda_1_id = AccountId::for_private_pda(&proxy_id, &seed, &alice_npk, 1);
+        let recipient_id = test_public_account_keys_2().account_id();
+        let recipient_signing_key = test_public_account_keys_2().signing_key;
+
+        let mut state = V03State::new_with_genesis_accounts(&[(funder_id, 500)], vec![], 0);
+
+        let alice_pda_0_account = Account {
+            program_owner: auth_transfer_id,
+            balance: amount,
+            nonce: Nonce::private_account_nonce_init(&alice_pda_0_id),
+            ..Account::default()
+        };
+        let alice_pda_1_account = Account {
+            program_owner: auth_transfer_id,
+            balance: amount,
+            nonce: Nonce::private_account_nonce_init(&alice_pda_1_id),
+            ..Account::default()
+        };
+
+        let alice_shared_0 = SharedSecretKey::new(&[10; 32], &alice_keys.vpk());
+        let alice_shared_1 = SharedSecretKey::new(&[11; 32], &alice_keys.vpk());
+
+        // Fund alice_pda_0
+        {
+            let funder_account = state.get_account_by_id(funder_id);
+            let funder_nonce = funder_account.nonce;
+            let (output, proof) = execute_and_prove(
+                vec![
+                    AccountWithMetadata::new(funder_account, true, funder_id),
+                    AccountWithMetadata::new(Account::default(), false, alice_pda_0_id),
+                ],
+                Program::serialize_instruction((seed, amount, auth_transfer_id, true)).unwrap(),
+                vec![
+                    InputAccountIdentity::Public,
+                    InputAccountIdentity::PrivatePdaInit {
+                        npk: alice_npk,
+                        ssk: alice_shared_0,
+                        identifier: 0,
+                    },
+                ],
+                &program_with_deps,
+            )
+            .unwrap();
+            let message = Message::try_from_circuit_output(
+                vec![funder_id],
+                vec![funder_nonce],
+                vec![(
+                    alice_npk,
+                    alice_keys.vpk(),
+                    EphemeralPublicKey::from_scalar([10; 32]),
+                )],
+                output,
+            )
+            .unwrap();
+            let witness_set = WitnessSet::for_message(&message, proof, &[&funder_keys.signing_key]);
+            state
+                .transition_from_privacy_preserving_transaction(
+                    &PrivacyPreservingTransaction::new(message, witness_set),
+                    1,
+                    0,
+                )
+                .unwrap();
+        }
+
+        // Fund alice_pda_1
+        {
+            let funder_account = state.get_account_by_id(funder_id);
+            let funder_nonce = funder_account.nonce;
+            let (output, proof) = execute_and_prove(
+                vec![
+                    AccountWithMetadata::new(funder_account, true, funder_id),
+                    AccountWithMetadata::new(Account::default(), false, alice_pda_1_id),
+                ],
+                Program::serialize_instruction((seed, amount, auth_transfer_id, true)).unwrap(),
+                vec![
+                    InputAccountIdentity::Public,
+                    InputAccountIdentity::PrivatePdaInit {
+                        npk: alice_npk,
+                        ssk: alice_shared_1,
+                        identifier: 1,
+                    },
+                ],
+                &program_with_deps,
+            )
+            .unwrap();
+            let message = Message::try_from_circuit_output(
+                vec![funder_id],
+                vec![funder_nonce],
+                vec![(
+                    alice_npk,
+                    alice_keys.vpk(),
+                    EphemeralPublicKey::from_scalar([11; 32]),
+                )],
+                output,
+            )
+            .unwrap();
+            let witness_set = WitnessSet::for_message(&message, proof, &[&funder_keys.signing_key]);
+            state
+                .transition_from_privacy_preserving_transaction(
+                    &PrivacyPreservingTransaction::new(message, witness_set),
+                    2,
+                    0,
+                )
+                .unwrap();
+        }
+
+        let commitment_pda_0 = Commitment::new(&alice_pda_0_id, &alice_pda_0_account);
+        let commitment_pda_1 = Commitment::new(&alice_pda_1_id, &alice_pda_1_account);
+
+        assert!(state.get_proof_for_commitment(&commitment_pda_0).is_some());
+        assert!(state.get_proof_for_commitment(&commitment_pda_1).is_some());
+
+        // Alice spends alice_pda_0 into the public recipient.
+        {
+            let recipient_account = state.get_account_by_id(recipient_id);
+            let (output, proof) = execute_and_prove(
+                vec![
+                    AccountWithMetadata::new(alice_pda_0_account, true, alice_pda_0_id),
+                    AccountWithMetadata::new(recipient_account, true, recipient_id),
+                ],
+                Program::serialize_instruction((seed, amount, auth_transfer_id, false)).unwrap(),
+                vec![
+                    InputAccountIdentity::PrivatePdaUpdate {
+                        ssk: alice_shared_0,
+                        nsk: alice_keys.nsk,
+                        membership_proof: state
+                            .get_proof_for_commitment(&commitment_pda_0)
+                            .expect("pda_0 must be in state"),
+                        identifier: 0,
+                    },
+                    InputAccountIdentity::Public,
+                ],
+                &program_with_deps,
+            )
+            .unwrap();
+            let message = Message::try_from_circuit_output(
+                vec![recipient_id],
+                vec![Nonce(0)],
+                vec![(
+                    alice_npk,
+                    alice_keys.vpk(),
+                    EphemeralPublicKey::from_scalar([10; 32]),
+                )],
+                output,
+            )
+            .unwrap();
+            let witness_set = WitnessSet::for_message(&message, proof, &[&recipient_signing_key]);
+            state
+                .transition_from_privacy_preserving_transaction(
+                    &PrivacyPreservingTransaction::new(message, witness_set),
+                    3,
+                    0,
+                )
+                .unwrap();
+        }
+
+        // Alice spends alice_pda_1 into the same public recipient.
+        {
+            let recipient_account = state.get_account_by_id(recipient_id);
+            let (output, proof) = execute_and_prove(
+                vec![
+                    AccountWithMetadata::new(alice_pda_1_account, true, alice_pda_1_id),
+                    AccountWithMetadata::new(recipient_account, false, recipient_id),
+                ],
+                Program::serialize_instruction((seed, amount, auth_transfer_id, false)).unwrap(),
+                vec![
+                    InputAccountIdentity::PrivatePdaUpdate {
+                        ssk: alice_shared_1,
+                        nsk: alice_keys.nsk,
+                        membership_proof: state
+                            .get_proof_for_commitment(&commitment_pda_1)
+                            .expect("pda_1 must be in state"),
+                        identifier: 1,
+                    },
+                    InputAccountIdentity::Public,
+                ],
+                &program_with_deps,
+            )
+            .unwrap();
+            let message = Message::try_from_circuit_output(
+                vec![recipient_id],
+                vec![],
+                vec![(
+                    alice_npk,
+                    alice_keys.vpk(),
+                    EphemeralPublicKey::from_scalar([11; 32]),
+                )],
+                output,
+            )
+            .unwrap();
+            let witness_set = WitnessSet::for_message(&message, proof, &[]);
+            state
+                .transition_from_privacy_preserving_transaction(
+                    &PrivacyPreservingTransaction::new(message, witness_set),
+                    4,
+                    0,
+                )
+                .unwrap();
+        }
+
+        assert_eq!(state.get_account_by_id(recipient_id).balance, 2 * amount);
+    }
 }
diff --git a/program_methods/guest/src/bin/privacy_preserving_circuit.rs b/program_methods/guest/src/bin/privacy_preserving_circuit.rs
index 70979b7e..16ad56d2 100644
--- a/program_methods/guest/src/bin/privacy_preserving_circuit.rs
+++ b/program_methods/guest/src/bin/privacy_preserving_circuit.rs
@@ -1,12 +1,13 @@
 use std::{
-    collections::{HashMap, HashSet, VecDeque, hash_map::Entry},
+    collections::{HashMap, VecDeque, hash_map::Entry},
     convert::Infallible,
 };
 
 use nssa_core::{
     Commitment, CommitmentSetDigest, DUMMY_COMMITMENT_HASH, EncryptionScheme, Identifier,
-    MembershipProof, Nullifier, NullifierPublicKey, NullifierSecretKey,
-    PrivacyPreservingCircuitInput, PrivacyPreservingCircuitOutput, SharedSecretKey,
+    InputAccountIdentity, MembershipProof, Nullifier, NullifierPublicKey, NullifierSecretKey,
+    PrivacyPreservingCircuitInput, PrivacyPreservingCircuitOutput, PrivateAccountKind,
+    SharedSecretKey,
     account::{Account, AccountId, AccountWithMetadata, Nonce},
     compute_digest_for_path,
     program::{
@@ -17,25 +18,26 @@ use nssa_core::{
 };
 use risc0_zkvm::{guest::env, serde::to_vec};
 
-const PRIVATE_PDA_FIXED_IDENTIFIER: u128 = u128::MAX;
-
 /// State of the involved accounts before and after program execution.
 struct ExecutionState {
     pre_states: Vec<AccountWithMetadata>,
     post_states: HashMap<AccountId, Account>,
     block_validity_window: BlockValidityWindow,
     timestamp_validity_window: TimestampValidityWindow,
-    /// Positions (in `pre_states`) of mask-3 accounts whose supplied npk has been bound to
-    /// their `AccountId` via a proven `AccountId::for_private_pda(program_id, seed, npk)`
-    /// check.
+    /// Positions (in `pre_states`) of private-PDA accounts whose supplied npk has been bound to
+    /// their `AccountId` via a proven `AccountId::for_private_pda(program_id, seed, npk,
+    /// identifier)` check.
     /// Two proof paths populate this set: a `Claim::Pda(seed)` in a program's `post_state` on
     /// that `pre_state`, or a caller's `ChainedCall.pda_seeds` entry matching that `pre_state`
     /// under the private derivation. Binding is an idempotent property, not an event: the same
     /// position can legitimately be bound through both paths in the same tx (e.g. a program
-    /// claims a private PDA and then delegates it to a callee), and the set uses `contains`,
-    /// not `assert!(insert)`. After the main loop, every mask-3 position must appear in this
-    /// set; otherwise the npk is unbound and the circuit rejects.
-    private_pda_bound_positions: HashSet<usize>,
+    /// claims a private PDA and then delegates it to a callee), and the map uses `contains_key`,
+    /// not `assert!(insert)`. After the main loop, every private-PDA position must appear in this
+    /// map; otherwise the npk is unbound and the circuit rejects.
+    /// The stored `(ProgramId, PdaSeed)` is the owner program and seed, used in
+    /// `compute_circuit_output` to construct `PrivateAccountKind::Pda { program_id, seed,
+    /// identifier }`.
+    private_pda_bound_positions: HashMap<usize, (ProgramId, PdaSeed)>,
     /// Across the whole transaction, each `(program_id, seed)` pair may resolve to at most one
     /// `AccountId`. A seed under a program can derive a family of accounts, one public PDA and
     /// one private PDA per distinct npk. Without this check, a single `pda_seeds: [S]` entry in
@@ -45,39 +47,30 @@ struct ExecutionState {
     /// `AccountId` entry or as an equality check against the existing one, making the rule: one
     /// `(program, seed)` → one account per tx.
     pda_family_binding: HashMap<(ProgramId, PdaSeed), AccountId>,
-    /// Map from a mask-3 `pre_state`'s position in `visibility_mask` to the npk supplied for
-    /// that position in `private_account_keys`. Built once in `derive_from_outputs` by walking
-    /// `visibility_mask` in lock-step with `private_account_keys`, used later by the claim and
-    /// caller-seeds authorization paths.
-    private_pda_npk_by_position: HashMap<usize, NullifierPublicKey>,
+    /// Map from a private-PDA `pre_state`'s position in `account_identities` to the (npk,
+    /// identifier) supplied for that position. Built once in `derive_from_outputs` by walking
+    /// `account_identities` and consulting `npk_if_private_pda`. Used later by the claim and
+    /// caller-seeds authorization paths to verify
+    /// `AccountId::for_private_pda(program_id, seed, npk, identifier) == pre_state.account_id`.
+    private_pda_npk_by_position: HashMap<usize, (NullifierPublicKey, Identifier)>,
 }
 
 impl ExecutionState {
     /// Validate program outputs and derive the overall execution state.
     pub fn derive_from_outputs(
-        visibility_mask: &[u8],
-        private_account_keys: &[(NullifierPublicKey, Identifier, SharedSecretKey)],
+        account_identities: &[InputAccountIdentity],
         program_id: ProgramId,
         program_outputs: Vec<ProgramOutput>,
     ) -> Self {
-        // Build position → npk map for mask-3 pre_states. `private_account_keys` is consumed in
-        // pre_state order across all masks 1/2/3, so walk `visibility_mask` in lock-step. The
-        // downstream `compute_circuit_output` also consumes the same iterator and its trailing
-        // assertions catch an over-supply of keys; under-supply surfaces here.
-        let mut private_pda_npk_by_position: HashMap<usize, NullifierPublicKey> = HashMap::new();
-        {
-            let mut keys_iter = private_account_keys.iter();
-            for (pos, &mask) in visibility_mask.iter().enumerate() {
-                if matches!(mask, 1..=3) {
-                    let (npk, _, _) = keys_iter.next().unwrap_or_else(|| {
-                        panic!(
-                            "private_account_keys shorter than visibility_mask demands: no key for masked position {pos} (mask {mask})"
-                        )
-                    });
-                    if mask == 3 {
-                        private_pda_npk_by_position.insert(pos, *npk);
-                    }
-                }
+        // Build position → (npk, identifier) map for private-PDA pre_states, indexed by position
+        // in `account_identities`. The vec is documented as 1:1 with the program's pre_state
+        // order, so position here matches `pre_state_position` used downstream in
+        // `validate_and_sync_states`.
+        let mut private_pda_npk_by_position: HashMap<usize, (NullifierPublicKey, Identifier)> =
+            HashMap::new();
+        for (pos, account_identity) in account_identities.iter().enumerate() {
+            if let Some((npk, identifier)) = account_identity.npk_if_private_pda() {
+                private_pda_npk_by_position.insert(pos, (npk, identifier));
             }
         }
 
@@ -115,7 +108,7 @@ impl ExecutionState {
             post_states: HashMap::new(),
             block_validity_window,
             timestamp_validity_window,
-            private_pda_bound_positions: HashSet::new(),
+            private_pda_bound_positions: HashMap::new(),
             pda_family_binding: HashMap::new(),
             private_pda_npk_by_position,
         };
@@ -194,7 +187,7 @@ impl ExecutionState {
             }
 
             execution_state.validate_and_sync_states(
-                visibility_mask,
+                account_identities,
                 chained_call.program_id,
                 caller_program_id,
                 &chained_call.pda_seeds,
@@ -211,14 +204,16 @@ impl ExecutionState {
             "Inner call without a chained call found",
         );
 
-        // Every mask-3 pre_state must have had its npk bound to its account_id, either via a
-        // `Claim::Pda(seed)` in some program's post_state or via a caller's `pda_seeds` matching
-        // the private derivation. An unbound mask-3 pre_state has no cryptographic link between
-        // the supplied npk and the account_id, and must be rejected.
-        for (pos, &mask) in visibility_mask.iter().enumerate() {
-            if mask == 3 {
+        // Every private-PDA pre_state must have had its npk bound to its account_id, either via
+        // a `Claim::Pda(seed)` in some program's post_state or via a caller's `pda_seeds`
+        // matching the private derivation. An unbound private-PDA pre_state has no
+        // cryptographic link between the supplied npk and the account_id, and must be rejected.
+        for (pos, account_identity) in account_identities.iter().enumerate() {
+            if account_identity.is_private_pda() {
                 assert!(
-                    execution_state.private_pda_bound_positions.contains(&pos),
+                    execution_state
+                        .private_pda_bound_positions
+                        .contains_key(&pos),
                     "private PDA pre_state at position {pos} has no proven (seed, npk) binding via Claim::Pda or caller pda_seeds"
                 );
             }
@@ -251,7 +246,7 @@ impl ExecutionState {
     /// Validate program pre and post states and populate the execution state.
     fn validate_and_sync_states(
         &mut self,
-        visibility_mask: &[u8],
+        account_identities: &[InputAccountIdentity],
         program_id: ProgramId,
         caller_program_id: Option<ProgramId>,
         caller_pda_seeds: &[PdaSeed],
@@ -329,9 +324,9 @@ impl ExecutionState {
                     .position(|acc| acc.account_id == pre_account_id)
                     .expect("Pre state must exist at this point");
 
-                let mask = visibility_mask[pre_state_position];
-                match mask {
-                    0 => match claim {
+                let account_identity = &account_identities[pre_state_position];
+                if account_identity.is_public() {
+                    match claim {
                         Claim::Authorized => {
                             // Note: no need to check authorized pdas because we have already
                             // checked consistency of authorization above.
@@ -353,40 +348,46 @@ impl ExecutionState {
                                 pre_account_id,
                             );
                         }
-                    },
-                    3 => {
-                        match claim {
-                            Claim::Authorized => {
-                                assert!(
-                                    pre_is_authorized,
-                                    "Cannot claim unauthorized private PDA {pre_account_id}"
-                                );
-                            }
-                            Claim::Pda(seed) => {
-                                let npk = self
+                    }
+                } else if account_identity.is_private_pda() {
+                    match claim {
+                        Claim::Authorized => {
+                            assert!(
+                                pre_is_authorized,
+                                "Cannot claim unauthorized private PDA {pre_account_id}"
+                            );
+                        }
+                        Claim::Pda(seed) => {
+                            let (npk, identifier) = self
                                 .private_pda_npk_by_position
                                 .get(&pre_state_position)
-                                .expect("private PDA pre_state must have an npk in the position map");
-                                let pda = AccountId::for_private_pda(&program_id, &seed, npk);
-                                assert_eq!(
-                                    pre_account_id, pda,
-                                    "Invalid private PDA claim for account {pre_account_id}"
+                                .expect(
+                                    "private PDA pre_state must have an npk in the position map",
                                 );
-                                self.private_pda_bound_positions.insert(pre_state_position);
-                                assert_family_binding(
-                                    &mut self.pda_family_binding,
-                                    program_id,
-                                    seed,
-                                    pre_account_id,
-                                );
-                            }
+                            let pda =
+                                AccountId::for_private_pda(&program_id, &seed, npk, *identifier);
+                            assert_eq!(
+                                pre_account_id, pda,
+                                "Invalid private PDA claim for account {pre_account_id}"
+                            );
+                            bind_private_pda_position(
+                                &mut self.private_pda_bound_positions,
+                                pre_state_position,
+                                program_id,
+                                seed,
+                            );
+                            assert_family_binding(
+                                &mut self.pda_family_binding,
+                                program_id,
+                                seed,
+                                pre_account_id,
+                            );
                         }
                     }
-                    _ => {
-                        // Mask 1/2: standard private accounts don't enforce the claim semantics.
-                        // Unauthorized private claiming is intentionally allowed since operating
-                        // these accounts requires the npk/nsk keypair anyway.
-                    }
+                } else {
+                    // Standalone private accounts: don't enforce the claim semantics.
+                    // Unauthorized private claiming is intentionally allowed since operating
+                    // these accounts requires the npk/nsk keypair anyway.
                 }
 
                 post.account_mut().program_owner = program_id;
@@ -438,6 +439,24 @@ fn assert_family_binding(
     }
 }
 
+fn bind_private_pda_position(
+    map: &mut HashMap<usize, (ProgramId, PdaSeed)>,
+    position: usize,
+    program_id: ProgramId,
+    seed: PdaSeed,
+) {
+    match map.entry(position) {
+        Entry::Occupied(e) => assert_eq!(
+            *e.get(),
+            (program_id, seed),
+            "Duplicate binding at position {position}: conflicting (program_id, seed)"
+        ),
+        Entry::Vacant(e) => {
+            e.insert((program_id, seed));
+        }
+    }
+}
+
 /// Resolve the authorization state of a `pre_state` seen again in a chained call and record
 /// any resulting bindings. Returns `true` if the `pre_state` is authorized through either a
 /// previously-seen authorization or a matching caller seed (under the public or private
@@ -453,8 +472,8 @@ fn assert_family_binding(
 )]
 fn resolve_authorization_and_record_bindings(
     pda_family_binding: &mut HashMap<(ProgramId, PdaSeed), AccountId>,
-    private_pda_bound_positions: &mut HashSet<usize>,
-    private_pda_npk_by_position: &HashMap<usize, NullifierPublicKey>,
+    private_pda_bound_positions: &mut HashMap<usize, (ProgramId, PdaSeed)>,
+    private_pda_npk_by_position: &HashMap<usize, (NullifierPublicKey, Identifier)>,
     pre_account_id: AccountId,
     pre_state_position: usize,
     caller_program_id: Option<ProgramId>,
@@ -467,8 +486,9 @@ fn resolve_authorization_and_record_bindings(
                 if AccountId::for_public_pda(&caller, seed) == pre_account_id {
                     return Some((*seed, false, caller));
                 }
-                if let Some(npk) = private_pda_npk_by_position.get(&pre_state_position)
-                    && AccountId::for_private_pda(&caller, seed, npk) == pre_account_id
+                if let Some((npk, identifier)) =
+                    private_pda_npk_by_position.get(&pre_state_position)
+                    && AccountId::for_private_pda(&caller, seed, npk, *identifier) == pre_account_id
                 {
                     return Some((*seed, true, caller));
                 }
@@ -479,7 +499,12 @@ fn resolve_authorization_and_record_bindings(
     if let Some((seed, is_private_form, caller)) = matched_caller_seed {
         assert_family_binding(pda_family_binding, caller, seed, pre_account_id);
         if is_private_form {
-            private_pda_bound_positions.insert(pre_state_position);
+            bind_private_pda_position(
+                private_pda_bound_positions,
+                pre_state_position,
+                caller,
+                seed,
+            );
         }
     }
 
@@ -487,11 +512,8 @@ fn resolve_authorization_and_record_bindings(
 }
 
 fn compute_circuit_output(
-    execution_state: ExecutionState,
-    visibility_mask: &[u8],
-    private_account_keys: &[(NullifierPublicKey, Identifier, SharedSecretKey)],
-    private_account_nsks: &[NullifierSecretKey],
-    private_account_membership_proofs: &[Option<MembershipProof>],
+    mut execution_state: ExecutionState,
+    account_identities: &[InputAccountIdentity],
 ) -> PrivacyPreservingCircuitOutput {
     let mut output = PrivacyPreservingCircuitOutput {
         public_pre_states: Vec::new(),
@@ -503,292 +525,280 @@ fn compute_circuit_output(
         timestamp_validity_window: execution_state.timestamp_validity_window,
     };
 
+    let pda_seed_by_position = std::mem::take(&mut execution_state.private_pda_bound_positions);
     let states_iter = execution_state.into_states_iter();
     assert_eq!(
-        visibility_mask.len(),
+        account_identities.len(),
         states_iter.len(),
-        "Invalid visibility mask length"
+        "Invalid account_identities length"
     );
 
-    let mut private_keys_iter = private_account_keys.iter();
-    let mut private_nsks_iter = private_account_nsks.iter();
-    let mut private_membership_proofs_iter = private_account_membership_proofs.iter();
-
     let mut output_index = 0;
-    for (account_visibility_mask, (pre_state, post_state)) in
-        visibility_mask.iter().copied().zip(states_iter)
+    for (pos, (account_identity, (pre_state, post_state))) in
+        account_identities.iter().zip(states_iter).enumerate()
     {
-        match account_visibility_mask {
-            0 => {
-                // Public account
+        match account_identity {
+            InputAccountIdentity::Public => {
                 output.public_pre_states.push(pre_state);
                 output.public_post_states.push(post_state);
             }
-            1 | 2 => {
-                let Some((npk, identifier, shared_secret)) = private_keys_iter.next() else {
-                    panic!("Missing private account key");
-                };
-                assert_ne!(
-                    *identifier, PRIVATE_PDA_FIXED_IDENTIFIER,
-                    "Identifier must be different from {PRIVATE_PDA_FIXED_IDENTIFIER}. This is reserved for private PDA."
-                );
-
-                let account_id = AccountId::from((npk, *identifier));
+            InputAccountIdentity::PrivateAuthorizedInit {
+                ssk,
+                nsk,
+                identifier,
+            } => {
+                let npk = NullifierPublicKey::from(nsk);
+                let account_id = AccountId::for_regular_private_account(&npk, *identifier);
 
                 assert_eq!(account_id, pre_state.account_id, "AccountId mismatch");
-
-                let (new_nullifier, new_nonce) = if account_visibility_mask == 1 {
-                    // Private account with authentication
-
-                    let Some(nsk) = private_nsks_iter.next() else {
-                        panic!("Missing private account nullifier secret key");
-                    };
-
-                    // Verify the nullifier public key
-                    assert_eq!(
-                        npk,
-                        &NullifierPublicKey::from(nsk),
-                        "Nullifier public key mismatch"
-                    );
-
-                    // Check pre_state authorization
-                    assert!(
-                        pre_state.is_authorized,
-                        "Pre-state not authorized for authenticated private account"
-                    );
-
-                    let Some(membership_proof_opt) = private_membership_proofs_iter.next() else {
-                        panic!("Missing membership proof");
-                    };
-
-                    let new_nullifier = compute_nullifier_and_set_digest(
-                        membership_proof_opt.as_ref(),
-                        &pre_state.account,
-                        &account_id,
-                        nsk,
-                    );
-
-                    let new_nonce = pre_state.account.nonce.private_account_nonce_increment(nsk);
-
-                    (new_nullifier, new_nonce)
-                } else {
-                    // Private account without authentication
-
-                    assert_eq!(
-                        pre_state.account,
-                        Account::default(),
-                        "Found new private account with non default values",
-                    );
-
-                    assert!(
-                        !pre_state.is_authorized,
-                        "Found new private account marked as authorized."
-                    );
-
-                    let Some(membership_proof_opt) = private_membership_proofs_iter.next() else {
-                        panic!("Missing membership proof");
-                    };
-
-                    assert!(
-                        membership_proof_opt.is_none(),
-                        "Membership proof must be None for unauthorized accounts"
-                    );
-
-                    let nullifier = Nullifier::for_account_initialization(&account_id);
-
-                    let new_nonce = Nonce::private_account_nonce_init(&account_id);
-
-                    ((nullifier, DUMMY_COMMITMENT_HASH), new_nonce)
-                };
-                output.new_nullifiers.push(new_nullifier);
-
-                // Update post-state with new nonce
-                let mut post_with_updated_nonce = post_state;
-                post_with_updated_nonce.nonce = new_nonce;
-
-                // Compute commitment
-                let commitment_post = Commitment::new(&account_id, &post_with_updated_nonce);
-
-                // Encrypt and push post state
-                let encrypted_account = EncryptionScheme::encrypt(
-                    &post_with_updated_nonce,
-                    *identifier,
-                    shared_secret,
-                    &commitment_post,
-                    output_index,
+                assert!(
+                    pre_state.is_authorized,
+                    "Pre-state not authorized for authenticated private account"
                 );
-
-                output.new_commitments.push(commitment_post);
-                output.ciphertexts.push(encrypted_account);
-                output_index = output_index
-                    .checked_add(1)
-                    .unwrap_or_else(|| panic!("Too many private accounts, output index overflow"));
-            }
-            3 => {
-                // Private PDA account. The supplied npk has already been bound to
-                // `pre_state.account_id` upstream in `validate_and_sync_states`, either via a
-                // `Claim::Pda(seed)` match or via a caller `pda_seeds` match, both of which
-                // assert `AccountId::for_private_pda(owner, seed, npk) == account_id`. The
-                // post-loop assertion in `derive_from_outputs` (see the
-                // `private_pda_bound_positions` check) guarantees that every mask-3
-                // position has been through at least one such binding, so this
-                // branch can safely use the wallet npk without re-verifying.
-                let Some((npk, identifier, shared_secret)) = private_keys_iter.next() else {
-                    panic!("Missing private account key");
-                };
-
                 assert_eq!(
-                    *identifier, PRIVATE_PDA_FIXED_IDENTIFIER,
-                    "Identifier for private PDAs must be {PRIVATE_PDA_FIXED_IDENTIFIER}."
+                    pre_state.account,
+                    Account::default(),
+                    "Found new private account with non default values"
                 );
 
-                let (new_nullifier, new_nonce) = if pre_state.is_authorized {
-                    // Existing private PDA with authentication (like mask 1)
-                    let Some(nsk) = private_nsks_iter.next() else {
-                        panic!("Missing private account nullifier secret key");
-                    };
-                    assert_eq!(
-                        npk,
-                        &NullifierPublicKey::from(nsk),
-                        "Nullifier public key mismatch"
-                    );
-
-                    let Some(membership_proof_opt) = private_membership_proofs_iter.next() else {
-                        panic!("Missing membership proof");
-                    };
-
-                    let new_nullifier = compute_nullifier_and_set_digest(
-                        membership_proof_opt.as_ref(),
-                        &pre_state.account,
-                        &pre_state.account_id,
-                        nsk,
-                    );
-                    let new_nonce = pre_state.account.nonce.private_account_nonce_increment(nsk);
-                    (new_nullifier, new_nonce)
-                } else {
-                    // New private PDA (like mask 2). The default + unauthorized requirement
-                    // here rules out use cases like a fully-private multisig, which would need
-                    // a non-default, non-authorized private PDA input account.
-                    // TODO(private-pdas-pr-2/3): relax this once the wallet can supply a
-                    // `(seed, owner)` side input so the npk-to-account_id binding can be
-                    // re-verified for an existing private PDA without a `Claim::Pda` or caller
-                    // `pda_seeds` match.
-                    assert_eq!(
-                        pre_state.account,
-                        Account::default(),
-                        "New private PDA must be default"
-                    );
-
-                    let Some(membership_proof_opt) = private_membership_proofs_iter.next() else {
-                        panic!("Missing membership proof");
-                    };
-                    assert!(
-                        membership_proof_opt.is_none(),
-                        "Membership proof must be None for new accounts"
-                    );
-
-                    let nullifier = Nullifier::for_account_initialization(&pre_state.account_id);
-                    let new_nonce = Nonce::private_account_nonce_init(&pre_state.account_id);
-                    ((nullifier, DUMMY_COMMITMENT_HASH), new_nonce)
-                };
-                output.new_nullifiers.push(new_nullifier);
-
-                let mut post_with_updated_nonce = post_state;
-                post_with_updated_nonce.nonce = new_nonce;
-
-                let commitment_post =
-                    Commitment::new(&pre_state.account_id, &post_with_updated_nonce);
-
-                let encrypted_account = EncryptionScheme::encrypt(
-                    &post_with_updated_nonce,
-                    PRIVATE_PDA_FIXED_IDENTIFIER,
-                    shared_secret,
-                    &commitment_post,
-                    output_index,
+                let new_nullifier = (
+                    Nullifier::for_account_initialization(&account_id),
+                    DUMMY_COMMITMENT_HASH,
                 );
+                let new_nonce = pre_state.account.nonce.private_account_nonce_increment(nsk);
 
-                output.new_commitments.push(commitment_post);
-                output.ciphertexts.push(encrypted_account);
-                output_index = output_index
-                    .checked_add(1)
-                    .unwrap_or_else(|| panic!("Too many private accounts, output index overflow"));
+                emit_private_output(
+                    &mut output,
+                    &mut output_index,
+                    post_state,
+                    &account_id,
+                    &PrivateAccountKind::Regular(*identifier),
+                    ssk,
+                    new_nullifier,
+                    new_nonce,
+                );
+            }
+            InputAccountIdentity::PrivateAuthorizedUpdate {
+                ssk,
+                nsk,
+                membership_proof,
+                identifier,
+            } => {
+                let npk = NullifierPublicKey::from(nsk);
+                let account_id = AccountId::for_regular_private_account(&npk, *identifier);
+
+                assert_eq!(account_id, pre_state.account_id, "AccountId mismatch");
+                assert!(
+                    pre_state.is_authorized,
+                    "Pre-state not authorized for authenticated private account"
+                );
+
+                let new_nullifier = compute_update_nullifier_and_set_digest(
+                    membership_proof,
+                    &pre_state.account,
+                    &account_id,
+                    nsk,
+                );
+                let new_nonce = pre_state.account.nonce.private_account_nonce_increment(nsk);
+
+                emit_private_output(
+                    &mut output,
+                    &mut output_index,
+                    post_state,
+                    &account_id,
+                    &PrivateAccountKind::Regular(*identifier),
+                    ssk,
+                    new_nullifier,
+                    new_nonce,
+                );
+            }
+            InputAccountIdentity::PrivateUnauthorized {
+                npk,
+                ssk,
+                identifier,
+            } => {
+                let account_id = AccountId::for_regular_private_account(npk, *identifier);
+
+                assert_eq!(account_id, pre_state.account_id, "AccountId mismatch");
+                assert_eq!(
+                    pre_state.account,
+                    Account::default(),
+                    "Found new private account with non default values",
+                );
+                assert!(
+                    !pre_state.is_authorized,
+                    "Found new private account marked as authorized."
+                );
+
+                let new_nullifier = (
+                    Nullifier::for_account_initialization(&account_id),
+                    DUMMY_COMMITMENT_HASH,
+                );
+                let new_nonce = Nonce::private_account_nonce_init(&account_id);
+
+                emit_private_output(
+                    &mut output,
+                    &mut output_index,
+                    post_state,
+                    &account_id,
+                    &PrivateAccountKind::Regular(*identifier),
+                    ssk,
+                    new_nullifier,
+                    new_nonce,
+                );
+            }
+            InputAccountIdentity::PrivatePdaInit {
+                npk: _,
+                ssk,
+                identifier,
+            } => {
+                // The npk-to-account_id binding is established upstream in
+                // `validate_and_sync_states` via `Claim::Pda(seed)` or a caller `pda_seeds`
+                // match. Here we only enforce the init pre-conditions. The supplied npk on
+                // the variant has been recorded into `private_pda_npk_by_position` and used
+                // for the binding check; we use `pre_state.account_id` directly for nullifier
+                // and commitment derivation.
+                assert!(
+                    !pre_state.is_authorized,
+                    "PrivatePdaInit requires unauthorized pre_state"
+                );
+                assert_eq!(
+                    pre_state.account,
+                    Account::default(),
+                    "New private PDA must be default"
+                );
+
+                let new_nullifier = (
+                    Nullifier::for_account_initialization(&pre_state.account_id),
+                    DUMMY_COMMITMENT_HASH,
+                );
+                let new_nonce = Nonce::private_account_nonce_init(&pre_state.account_id);
+
+                let account_id = pre_state.account_id;
+                let (pda_program_id, seed) = pda_seed_by_position
+                    .get(&pos)
+                    .expect("PrivatePdaInit position must be in pda_seed_by_position");
+                emit_private_output(
+                    &mut output,
+                    &mut output_index,
+                    post_state,
+                    &account_id,
+                    &PrivateAccountKind::Pda {
+                        program_id: *pda_program_id,
+                        seed: *seed,
+                        identifier: *identifier,
+                    },
+                    ssk,
+                    new_nullifier,
+                    new_nonce,
+                );
+            }
+            InputAccountIdentity::PrivatePdaUpdate {
+                ssk,
+                nsk,
+                membership_proof,
+                identifier,
+            } => {
+                // The npk binding is established upstream. Authorization must already be set;
+                // an unauthorized PrivatePdaUpdate would mean the prover supplied an nsk for an
+                // unbound PDA, which the upstream binding check would have rejected anyway,
+                // but we assert here to fail fast and document the precondition.
+                assert!(
+                    pre_state.is_authorized,
+                    "PrivatePdaUpdate requires authorized pre_state"
+                );
+
+                let new_nullifier = compute_update_nullifier_and_set_digest(
+                    membership_proof,
+                    &pre_state.account,
+                    &pre_state.account_id,
+                    nsk,
+                );
+                let new_nonce = pre_state.account.nonce.private_account_nonce_increment(nsk);
+
+                let account_id = pre_state.account_id;
+                let (pda_program_id, seed) = pda_seed_by_position
+                    .get(&pos)
+                    .expect("PrivatePdaUpdate position must be in pda_seed_by_position");
+                emit_private_output(
+                    &mut output,
+                    &mut output_index,
+                    post_state,
+                    &account_id,
+                    &PrivateAccountKind::Pda {
+                        program_id: *pda_program_id,
+                        seed: *seed,
+                        identifier: *identifier,
+                    },
+                    ssk,
+                    new_nullifier,
+                    new_nonce,
+                );
             }
-            _ => panic!("Invalid visibility mask value"),
         }
     }
 
-    assert!(
-        private_keys_iter.next().is_none(),
-        "Too many private account keys"
-    );
-
-    assert!(
-        private_nsks_iter.next().is_none(),
-        "Too many private account nullifier secret keys"
-    );
-
-    assert!(
-        private_membership_proofs_iter.next().is_none(),
-        "Too many private account membership proofs"
-    );
-
     output
 }
 
-fn compute_nullifier_and_set_digest(
-    membership_proof_opt: Option<&MembershipProof>,
+#[expect(
+    clippy::too_many_arguments,
+    reason = "All seven inputs are distinct concerns from the variant arms; bundling would be artificial"
+)]
+fn emit_private_output(
+    output: &mut PrivacyPreservingCircuitOutput,
+    output_index: &mut u32,
+    post_state: Account,
+    account_id: &AccountId,
+    kind: &PrivateAccountKind,
+    shared_secret: &SharedSecretKey,
+    new_nullifier: (Nullifier, CommitmentSetDigest),
+    new_nonce: Nonce,
+) {
+    output.new_nullifiers.push(new_nullifier);
+
+    let mut post_with_updated_nonce = post_state;
+    post_with_updated_nonce.nonce = new_nonce;
+
+    let commitment_post = Commitment::new(account_id, &post_with_updated_nonce);
+    let encrypted_account = EncryptionScheme::encrypt(
+        &post_with_updated_nonce,
+        kind,
+        shared_secret,
+        &commitment_post,
+        *output_index,
+    );
+
+    output.new_commitments.push(commitment_post);
+    output.ciphertexts.push(encrypted_account);
+    *output_index = output_index
+        .checked_add(1)
+        .unwrap_or_else(|| panic!("Too many private accounts, output index overflow"));
+}
+
+fn compute_update_nullifier_and_set_digest(
+    membership_proof: &MembershipProof,
     pre_account: &Account,
     account_id: &AccountId,
     nsk: &NullifierSecretKey,
 ) -> (Nullifier, CommitmentSetDigest) {
-    membership_proof_opt.as_ref().map_or_else(
-        || {
-            assert_eq!(
-                *pre_account,
-                Account::default(),
-                "Found new private account with non default values"
-            );
-
-            // Compute initialization nullifier
-            let nullifier = Nullifier::for_account_initialization(account_id);
-            (nullifier, DUMMY_COMMITMENT_HASH)
-        },
-        |membership_proof| {
-            // Compute commitment set digest associated with provided auth path
-            let commitment_pre = Commitment::new(account_id, pre_account);
-            let set_digest = compute_digest_for_path(&commitment_pre, membership_proof);
-
-            // Compute update nullifier
-            let nullifier = Nullifier::for_account_update(&commitment_pre, nsk);
-            (nullifier, set_digest)
-        },
-    )
+    let commitment_pre = Commitment::new(account_id, pre_account);
+    let set_digest = compute_digest_for_path(&commitment_pre, membership_proof);
+    let nullifier = Nullifier::for_account_update(&commitment_pre, nsk);
+    (nullifier, set_digest)
 }
 
 fn main() {
     let PrivacyPreservingCircuitInput {
         program_outputs,
-        visibility_mask,
-        private_account_keys,
-        private_account_nsks,
-        private_account_membership_proofs,
+        account_identities,
         program_id,
     } = env::read();
 
-    let execution_state = ExecutionState::derive_from_outputs(
-        &visibility_mask,
-        &private_account_keys,
-        program_id,
-        program_outputs,
-    );
+    let execution_state =
+        ExecutionState::derive_from_outputs(&account_identities, program_id, program_outputs);
 
-    let output = compute_circuit_output(
-        execution_state,
-        &visibility_mask,
-        &private_account_keys,
-        &private_account_nsks,
-        &private_account_membership_proofs,
-    );
+    let output = compute_circuit_output(execution_state, &account_identities);
 
     env::commit(&output);
 }
diff --git a/sequencer/core/Cargo.toml b/sequencer/core/Cargo.toml
index efd0e359..827c8b2e 100644
--- a/sequencer/core/Cargo.toml
+++ b/sequencer/core/Cargo.toml
@@ -13,7 +13,7 @@ nssa_core.workspace = true
 common.workspace = true
 storage.workspace = true
 mempool.workspace = true
-bedrock_client.workspace = true
+logos-blockchain-zone-sdk.workspace = true
 testnet_initial_state.workspace = true
 
 anyhow.workspace = true
@@ -30,7 +30,6 @@ rand.workspace = true
 borsh.workspace = true
 bytesize.workspace = true
 url.workspace = true
-jsonrpsee = { workspace = true, features = ["ws-client"] }
 
 [features]
 default = []
diff --git a/sequencer/core/src/block_publisher.rs b/sequencer/core/src/block_publisher.rs
new file mode 100644
index 00000000..9f4c8235
--- /dev/null
+++ b/sequencer/core/src/block_publisher.rs
@@ -0,0 +1,136 @@
+use std::{sync::Arc, time::Duration};
+
+use anyhow::{Context as _, Result, anyhow};
+use common::block::Block;
+use log::warn;
+pub use logos_blockchain_core::mantle::ops::channel::MsgId;
+pub use logos_blockchain_key_management_system_service::keys::Ed25519Key;
+pub use logos_blockchain_zone_sdk::sequencer::SequencerCheckpoint;
+use logos_blockchain_zone_sdk::{
+    CommonHttpClient,
+    adapter::NodeHttpClient,
+    sequencer::{Event, SequencerConfig as ZoneSdkSequencerConfig, SequencerHandle, ZoneSequencer},
+    state::InscriptionInfo,
+};
+use tokio::task::JoinHandle;
+
+use crate::config::BedrockConfig;
+
+/// Sink for `Event::Published` checkpoints emitted by the drive task.
+/// Caller is responsible for persistence (e.g. writing to rocksdb).
+pub type CheckpointSink = Box<dyn Fn(SequencerCheckpoint) + Send + Sync + 'static>;
+
+/// Sink for finalized L2 block ids derived from `Event::TxsFinalized` and
+/// `Event::FinalizedInscriptions`. Caller is responsible for cleanup
+/// (e.g. marking pending blocks as finalized in storage).
+pub type FinalizedBlockSink = Box<dyn Fn(u64) + Send + Sync + 'static>;
+
+#[expect(async_fn_in_trait, reason = "We don't care about Send/Sync here")]
+pub trait BlockPublisherTrait: Clone {
+    async fn new(
+        config: &BedrockConfig,
+        bedrock_signing_key: Ed25519Key,
+        resubmit_interval: Duration,
+        initial_checkpoint: Option<SequencerCheckpoint>,
+        on_checkpoint: CheckpointSink,
+        on_finalized_block: FinalizedBlockSink,
+    ) -> Result<Self>;
+
+    /// Fire-and-forget publish. Zone-sdk drives the actual submission and
+    /// retries internally; this just hands the payload off.
+    async fn publish_block(&self, block: &Block) -> Result<()>;
+}
+
+/// Real block publisher backed by zone-sdk's `ZoneSequencer`.
+#[derive(Clone)]
+pub struct ZoneSdkPublisher {
+    handle: SequencerHandle<NodeHttpClient>,
+    // Aborts the drive task when the last clone is dropped.
+    _drive_task: Arc<DriveTaskGuard>,
+}
+
+struct DriveTaskGuard(JoinHandle<()>);
+
+impl Drop for DriveTaskGuard {
+    fn drop(&mut self) {
+        self.0.abort();
+    }
+}
+
+impl BlockPublisherTrait for ZoneSdkPublisher {
+    async fn new(
+        config: &BedrockConfig,
+        bedrock_signing_key: Ed25519Key,
+        resubmit_interval: Duration,
+        initial_checkpoint: Option<SequencerCheckpoint>,
+        on_checkpoint: CheckpointSink,
+        on_finalized_block: FinalizedBlockSink,
+    ) -> Result<Self> {
+        let basic_auth = config.auth.clone().map(Into::into);
+        let node = NodeHttpClient::new(CommonHttpClient::new(basic_auth), config.node_url.clone());
+
+        let zone_sdk_config = ZoneSdkSequencerConfig {
+            resubmit_interval,
+            ..ZoneSdkSequencerConfig::default()
+        };
+
+        let (mut sequencer, mut handle) = ZoneSequencer::init_with_config(
+            config.channel_id,
+            bedrock_signing_key,
+            node,
+            zone_sdk_config,
+            initial_checkpoint,
+        );
+
+        let drive_task = tokio::spawn(async move {
+            loop {
+                let Some(event) = sequencer.next_event().await else {
+                    continue;
+                };
+                match event {
+                    Event::Published { checkpoint, .. } => on_checkpoint(checkpoint),
+                    Event::TxsFinalized { inscriptions, .. }
+                    | Event::FinalizedInscriptions { inscriptions } => {
+                        if let Some(max_block_id) = max_block_id_from_inscriptions(&inscriptions) {
+                            on_finalized_block(max_block_id);
+                        }
+                    }
+                    Event::ChannelUpdate { .. } | Event::Ready => {}
+                }
+            }
+        });
+
+        handle.wait_ready().await;
+
+        Ok(Self {
+            handle,
+            _drive_task: Arc::new(DriveTaskGuard(drive_task)),
+        })
+    }
+
+    async fn publish_block(&self, block: &Block) -> Result<()> {
+        let data = borsh::to_vec(block).context("Failed to serialize block")?;
+        self.handle
+            .publish_message(data)
+            .await
+            .map_err(|e| anyhow!("zone-sdk publish failed: {e}"))?;
+        Ok(())
+    }
+}
+
+/// Deserialize each inscription payload as a `Block` and return the highest
+/// `block_id`. Bad payloads are logged and skipped.
+fn max_block_id_from_inscriptions(inscriptions: &[InscriptionInfo]) -> Option<u64> {
+    inscriptions
+        .iter()
+        .filter_map(
+            |inscription| match borsh::from_slice::<Block>(&inscription.payload) {
+                Ok(block) => Some(block.header.block_id),
+                Err(err) => {
+                    warn!("Failed to deserialize finalized inscription as Block: {err:#}");
+                    None
+                }
+            },
+        )
+        .max()
+}
diff --git a/sequencer/core/src/block_settlement_client.rs b/sequencer/core/src/block_settlement_client.rs
deleted file mode 100644
index 6b32f8de..00000000
--- a/sequencer/core/src/block_settlement_client.rs
+++ /dev/null
@@ -1,116 +0,0 @@
-use anyhow::{Context as _, Result};
-use bedrock_client::BedrockClient;
-pub use common::block::Block;
-pub use logos_blockchain_core::mantle::{MantleTx, SignedMantleTx, ops::channel::MsgId};
-use logos_blockchain_core::mantle::{
-    Op, OpProof, Transaction as _,
-    ops::channel::{ChannelId, inscribe::InscriptionOp},
-};
-pub use logos_blockchain_key_management_system_service::keys::Ed25519Key;
-use logos_blockchain_key_management_system_service::keys::Ed25519PublicKey;
-
-use crate::config::BedrockConfig;
-
-#[expect(async_fn_in_trait, reason = "We don't care about Send/Sync here")]
-pub trait BlockSettlementClientTrait: Clone {
-    //// Create a new client.
-    fn new(config: &BedrockConfig, signing_key: Ed25519Key) -> Result<Self>;
-
-    /// Get the bedrock channel ID used by this client.
-    fn bedrock_channel_id(&self) -> ChannelId;
-
-    /// Get the bedrock signing key used by this client.
-    fn bedrock_signing_key(&self) -> &Ed25519Key;
-
-    /// Post a transaction to the node.
-    async fn submit_inscribe_tx_to_bedrock(&self, tx: SignedMantleTx) -> Result<()>;
-
-    /// Create and sign a transaction for inscribing data.
-    fn create_inscribe_tx(&self, block: &Block) -> Result<(SignedMantleTx, MsgId)> {
-        let inscription_data = borsh::to_vec(block)?;
-        log::debug!(
-            "The size of the block {} is {} bytes",
-            block.header.block_id,
-            inscription_data.len()
-        );
-        let verifying_key_bytes = self.bedrock_signing_key().public_key().to_bytes();
-        let verifying_key =
-            Ed25519PublicKey::from_bytes(&verifying_key_bytes).expect("valid ed25519 public key");
-
-        let inscribe_op = InscriptionOp {
-            channel_id: self.bedrock_channel_id(),
-            inscription: inscription_data,
-            parent: block.bedrock_parent_id.into(),
-            signer: verifying_key,
-        };
-        let inscribe_op_id = inscribe_op.id();
-
-        let inscribe_tx = MantleTx {
-            ops: vec![Op::ChannelInscribe(inscribe_op)],
-            // Altruistic test config
-            storage_gas_price: 0.into(),
-            execution_gas_price: 0.into(),
-        };
-
-        let tx_hash = inscribe_tx.hash();
-        let signature_bytes = self
-            .bedrock_signing_key()
-            .sign_payload(tx_hash.as_signing_bytes().as_ref())
-            .to_bytes();
-        let signature =
-            logos_blockchain_key_management_system_service::keys::Ed25519Signature::from_bytes(
-                &signature_bytes,
-            );
-
-        let signed_mantle_tx = SignedMantleTx {
-            ops_proofs: vec![OpProof::Ed25519Sig(signature)],
-            mantle_tx: inscribe_tx,
-        };
-        Ok((signed_mantle_tx, inscribe_op_id))
-    }
-}
-
-/// A component that posts block data to logos blockchain.
-#[derive(Clone)]
-pub struct BlockSettlementClient {
-    client: BedrockClient,
-    signing_key: Ed25519Key,
-    channel_id: ChannelId,
-}
-
-impl BlockSettlementClientTrait for BlockSettlementClient {
-    fn new(config: &BedrockConfig, signing_key: Ed25519Key) -> Result<Self> {
-        let client =
-            BedrockClient::new(config.backoff, config.node_url.clone(), config.auth.clone())
-                .context("Failed to initialize bedrock client")?;
-        Ok(Self {
-            client,
-            signing_key,
-            channel_id: config.channel_id,
-        })
-    }
-
-    async fn submit_inscribe_tx_to_bedrock(&self, tx: SignedMantleTx) -> Result<()> {
-        let (parent_id, msg_id) = match tx.mantle_tx.ops.first() {
-            Some(Op::ChannelInscribe(inscribe)) => (inscribe.parent, inscribe.id()),
-            _ => panic!("Expected ChannelInscribe op"),
-        };
-        self.client
-            .post_transaction(tx)
-            .await
-            .context("Failed to post transaction to Bedrock after retries")?
-            .context("Failed to post transaction to Bedrock with non-retryable error")?;
-
-        log::debug!("Posted block to Bedrock with parent id {parent_id:?} and msg id: {msg_id:?}");
-
-        Ok(())
-    }
-
-    fn bedrock_channel_id(&self) -> ChannelId {
-        self.channel_id
-    }
-
-    fn bedrock_signing_key(&self) -> &Ed25519Key {
-        &self.signing_key
-    }
-}
diff --git a/sequencer/core/src/block_store.rs b/sequencer/core/src/block_store.rs
index 7e47005d..e85b5d33 100644
--- a/sequencer/core/src/block_store.rs
+++ b/sequencer/core/src/block_store.rs
@@ -1,16 +1,17 @@
-use std::{collections::HashMap, path::Path};
+use std::{collections::HashMap, path::Path, sync::Arc};
 
-use anyhow::Result;
+use anyhow::{Context as _, Result};
 use common::{
     HashType,
     block::{Block, BlockMeta, MantleMsgId},
     transaction::NSSATransaction,
 };
+use logos_blockchain_zone_sdk::sequencer::SequencerCheckpoint;
 use nssa::V03State;
 use storage::{error::DbError, sequencer::RocksDBIO};
 
 pub struct SequencerStore {
-    dbio: RocksDBIO,
+    dbio: Arc<RocksDBIO>,
     // TODO: Consider adding the hashmap to the database for faster recovery.
     tx_hash_to_block_map: HashMap<HashType, u64>,
     genesis_id: u64,
@@ -30,7 +31,11 @@ impl SequencerStore {
     ) -> Result<Self> {
         let tx_hash_to_block_map = block_to_transactions_map(genesis_block);
 
-        let dbio = RocksDBIO::open_or_create(location, genesis_block, genesis_msg_id)?;
+        let dbio = Arc::new(RocksDBIO::open_or_create(
+            location,
+            genesis_block,
+            genesis_msg_id,
+        )?);
 
         let genesis_id = dbio.get_meta_first_block_in_db()?;
 
@@ -42,6 +47,14 @@ impl SequencerStore {
         })
     }
 
+    /// Shared handle to the underlying rocksdb. Used to persist the zone-sdk
+    /// checkpoint from the sequencer's drive task without needing &mut to the
+    /// store.
+    #[must_use]
+    pub fn dbio(&self) -> Arc<RocksDBIO> {
+        Arc::clone(&self.dbio)
+    }
+
     pub fn get_block_at_id(&self, id: u64) -> Result<Option<Block>, DbError> {
         self.dbio.get_block(id)
     }
@@ -55,6 +68,7 @@ impl SequencerStore {
     }
 
     /// Returns the transaction corresponding to the given hash, if it exists in the blockchain.
+    #[must_use]
     pub fn get_transaction_by_hash(&self, hash: HashType) -> Option<NSSATransaction> {
         let block_id = *self.tx_hash_to_block_map.get(&hash)?;
         let block = self
@@ -76,10 +90,12 @@ impl SequencerStore {
         Ok(self.dbio.latest_block_meta()?)
     }
 
+    #[must_use]
     pub const fn genesis_id(&self) -> u64 {
         self.genesis_id
     }
 
+    #[must_use]
     pub const fn signing_key(&self) -> &nssa::PrivateKey {
         &self.signing_key
     }
@@ -100,9 +116,26 @@ impl SequencerStore {
         Ok(())
     }
 
+    #[must_use]
     pub fn get_nssa_state(&self) -> Option<V03State> {
         self.dbio.get_nssa_state().ok()
     }
+
+    pub fn get_zone_checkpoint(&self) -> Result<Option<SequencerCheckpoint>> {
+        let Some(bytes) = self.dbio.get_zone_sdk_checkpoint_bytes()? else {
+            return Ok(None);
+        };
+        let checkpoint: SequencerCheckpoint = serde_json::from_slice(&bytes)
+            .context("Failed to deserialize stored zone-sdk checkpoint")?;
+        Ok(Some(checkpoint))
+    }
+
+    pub fn set_zone_checkpoint(&self, checkpoint: &SequencerCheckpoint) -> Result<()> {
+        let bytes =
+            serde_json::to_vec(checkpoint).context("Failed to serialize zone-sdk checkpoint")?;
+        self.dbio.put_zone_sdk_checkpoint_bytes(&bytes)?;
+        Ok(())
+    }
 }
 
 pub(crate) fn block_to_transactions_map(block: &Block) -> HashMap<HashType, u64> {
diff --git a/sequencer/core/src/config.rs b/sequencer/core/src/config.rs
index fa4a2fa7..b33dd694 100644
--- a/sequencer/core/src/config.rs
+++ b/sequencer/core/src/config.rs
@@ -6,7 +6,6 @@ use std::{
 };
 
 use anyhow::Result;
-use bedrock_client::BackoffConfig;
 use bytesize::ByteSize;
 use common::config::BasicAuth;
 use humantime_serde;
@@ -42,8 +41,6 @@ pub struct SequencerConfig {
     pub signing_key: [u8; 32],
     /// Bedrock configuration options.
     pub bedrock_config: BedrockConfig,
-    /// Indexer RPC URL.
-    pub indexer_rpc_url: Url,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub initial_public_accounts: Option<Vec<PublicAccountPublicInitialData>>,
     #[serde(skip_serializing_if = "Option::is_none")]
@@ -52,9 +49,6 @@ pub struct SequencerConfig {
 
 #[derive(Clone, Serialize, Deserialize)]
 pub struct BedrockConfig {
-    /// Fibonacci backoff retry strategy configuration.
-    #[serde(default)]
-    pub backoff: BackoffConfig,
     /// Bedrock channel ID.
     pub channel_id: ChannelId,
     /// Bedrock Url.
diff --git a/sequencer/core/src/lib.rs b/sequencer/core/src/lib.rs
index 22c09d85..df9aa87c 100644
--- a/sequencer/core/src/lib.rs
+++ b/sequencer/core/src/lib.rs
@@ -1,7 +1,6 @@
 use std::{path::Path, time::Instant};
 
 use anyhow::{Context as _, Result, anyhow};
-use bedrock_client::SignedMantleTx;
 #[cfg(feature = "testnet")]
 use common::PINATA_BASE58;
 use common::{
@@ -20,33 +19,27 @@ pub use storage::error::DbError;
 use testnet_initial_state::initial_state;
 
 use crate::{
-    block_settlement_client::{BlockSettlementClient, BlockSettlementClientTrait, MsgId},
+    block_publisher::{BlockPublisherTrait, ZoneSdkPublisher},
     block_store::SequencerStore,
-    indexer_client::{IndexerClient, IndexerClientTrait},
 };
 
-pub mod block_settlement_client;
+pub mod block_publisher;
 pub mod block_store;
 pub mod config;
-pub mod indexer_client;
 
 #[cfg(feature = "mock")]
 pub mod mock;
 
-pub struct SequencerCore<
-    BC: BlockSettlementClientTrait = BlockSettlementClient,
-    IC: IndexerClientTrait = IndexerClient,
-> {
+pub struct SequencerCore<BP: BlockPublisherTrait = ZoneSdkPublisher> {
     state: nssa::V03State,
     store: SequencerStore,
     mempool: MemPool<NSSATransaction>,
     sequencer_config: SequencerConfig,
     chain_height: u64,
-    block_settlement_client: BC,
-    indexer_client: IC,
+    block_publisher: BP,
 }
 
-impl<BC: BlockSettlementClientTrait, IC: IndexerClientTrait> SequencerCore<BC, IC> {
+impl<BP: BlockPublisherTrait> SequencerCore<BP> {
     /// Starts the sequencer using the provided configuration.
     /// If an existing database is found, the sequencer state is loaded from it and
     /// assumed to represent the correct latest state consistent with Bedrock-finalized data.
@@ -70,23 +63,16 @@ impl<BC: BlockSettlementClientTrait, IC: IndexerClientTrait> SequencerCore<BC, I
             load_or_create_signing_key(&config.home.join("bedrock_signing_key"))
                 .expect("Failed to load or create bedrock signing key");
 
-        let block_settlement_client = BC::new(&config.bedrock_config, bedrock_signing_key)
-            .expect("Failed to initialize Block Settlement Client");
-
-        let indexer_client = IC::new(&config.indexer_rpc_url)
-            .await
-            .expect("Failed to create Indexer Client");
-
-        let (_tx, genesis_msg_id) = block_settlement_client
-            .create_inscribe_tx(&genesis_block)
-            .expect("Failed to create inscribe tx for genesis block");
+        // TODO: Remove msg_id from BlockMeta — it is no longer needed now that
+        // zone-sdk manages L1 settlement state via its own checkpoint.
+        let genesis_msg_id = [0_u8; 32];
 
         // Sequencer should panic if unable to open db,
         // as fixing this issue may require actions non-native to program scope
         let store = SequencerStore::open_db_with_genesis(
             &config.home.join("rocksdb"),
             &genesis_block,
-            genesis_msg_id.into(),
+            genesis_msg_id,
             signing_key,
         )
         .unwrap();
@@ -94,6 +80,51 @@ impl<BC: BlockSettlementClientTrait, IC: IndexerClientTrait> SequencerCore<BC, I
             .latest_block_meta()
             .expect("Failed to read latest block meta from store");
 
+        let initial_checkpoint = store
+            .get_zone_checkpoint()
+            .expect("Failed to load zone-sdk checkpoint");
+        let is_fresh_start = initial_checkpoint.is_none();
+
+        let dbio_for_checkpoint = store.dbio();
+        let on_checkpoint: block_publisher::CheckpointSink = Box::new(move |cp| {
+            let bytes = match serde_json::to_vec(&cp) {
+                Ok(b) => b,
+                Err(err) => {
+                    error!("Failed to serialize zone-sdk checkpoint: {err:#}");
+                    return;
+                }
+            };
+            if let Err(err) = dbio_for_checkpoint.put_zone_sdk_checkpoint_bytes(&bytes) {
+                error!("Failed to persist zone-sdk checkpoint: {err:#}");
+            }
+        });
+
+        let dbio_for_finalized = store.dbio();
+        let on_finalized_block: block_publisher::FinalizedBlockSink = Box::new(move |block_id| {
+            if let Err(err) = dbio_for_finalized.clean_pending_blocks_up_to(block_id) {
+                error!("Failed to mark pending blocks finalized up to {block_id}: {err:#}");
+            }
+        });
+
+        let block_publisher = BP::new(
+            &config.bedrock_config,
+            bedrock_signing_key,
+            config.retry_pending_blocks_timeout,
+            initial_checkpoint,
+            on_checkpoint,
+            on_finalized_block,
+        )
+        .await
+        .expect("Failed to initialize Block Publisher");
+
+        // On a truly fresh start (no checkpoint persisted yet), publish the
+        // genesis block so the indexer can find the channel start. After the
+        // first publish, zone-sdk's checkpoint persistence covers further
+        // restarts.
+        if is_fresh_start && let Err(err) = block_publisher.publish_block(&genesis_block).await {
+            error!("Failed to publish genesis block: {err:#}");
+        }
+
         #[cfg_attr(not(feature = "testnet"), allow(unused_mut))]
         let mut state = if let Some(state) = store.get_nssa_state() {
             info!("Found local database. Loading state and pending blocks from it.");
@@ -110,7 +141,7 @@ impl<BC: BlockSettlementClientTrait, IC: IndexerClientTrait> SequencerCore<BC, I
                     .iter()
                     .map(|init_comm_data| {
                         let npk = &init_comm_data.npk;
-                        let account_id = nssa::AccountId::from((npk, 0));
+                        let account_id = nssa::AccountId::for_regular_private_account(npk, 0);
 
                         let mut acc = init_comm_data.account.clone();
 
@@ -159,35 +190,33 @@ impl<BC: BlockSettlementClientTrait, IC: IndexerClientTrait> SequencerCore<BC, I
             mempool,
             chain_height: latest_block_meta.id,
             sequencer_config: config,
-            block_settlement_client,
-            indexer_client,
+            block_publisher,
         };
 
         (sequencer_core, mempool_handle)
     }
 
+    /// Produces a new block from mempool transactions and publishes it via zone-sdk.
     pub async fn produce_new_block(&mut self) -> Result<u64> {
-        let (tx, _msg_id) = self
-            .produce_new_block_with_mempool_transactions()
-            .context("Failed to produce new block with mempool transactions")?;
-        match self
-            .block_settlement_client
-            .submit_inscribe_tx_to_bedrock(tx)
-            .await
-        {
-            Ok(()) => {}
-            Err(err) => {
-                error!("Failed to post block data to Bedrock with error: {err:#}");
-            }
+        let block = self
+            .build_block_from_mempool()
+            .context("Failed to build block from mempool transactions")?;
+
+        // TODO: Remove msg_id from store.update — it is no longer needed now that
+        // zone-sdk manages L1 settlement state via its own checkpoint.
+        let placeholder_msg_id = [0_u8; 32];
+
+        if let Err(err) = self.block_publisher.publish_block(&block).await {
+            error!("Failed to publish block to Bedrock with error: {err:#}");
         }
+        self.store.update(&block, placeholder_msg_id, &self.state)?;
 
         Ok(self.chain_height)
     }
 
-    /// Produces new block from transactions in mempool and packs it into a `SignedMantleTx`.
-    pub fn produce_new_block_with_mempool_transactions(
-        &mut self,
-    ) -> Result<(SignedMantleTx, MsgId)> {
+    /// Builds a new block from transactions in the mempool.
+    /// Does NOT publish or store the block — the caller is responsible for that.
+    pub fn build_block_from_mempool(&mut self) -> Result<Block> {
         let now = Instant::now();
 
         let new_block_height = self.next_block_id();
@@ -277,21 +306,12 @@ impl<BC: BlockSettlementClientTrait, IC: IndexerClientTrait> SequencerCore<BC, I
             timestamp: new_block_timestamp,
         };
 
+        // TODO: Remove bedrock_parent_id from Block — it is no longer needed now
+        // that zone-sdk manages the inscription parent chain internally.
+        let placeholder_parent_id = [0_u8; 32];
         let block = hashable_data
             .clone()
-            .into_pending_block(self.store.signing_key(), latest_block_meta.msg_id);
-
-        let (tx, msg_id) = self
-            .block_settlement_client
-            .create_inscribe_tx(&block)
-            .with_context(|| {
-                format!(
-                    "Failed to create inscribe transaction for block with id {}",
-                    block.header.block_id
-                )
-            })?;
-
-        self.store.update(&block, msg_id.into(), &self.state)?;
+            .into_pending_block(self.store.signing_key(), placeholder_parent_id);
 
         self.chain_height = new_block_height;
 
@@ -300,7 +320,7 @@ impl<BC: BlockSettlementClientTrait, IC: IndexerClientTrait> SequencerCore<BC, I
             hashable_data.transactions.len(),
             now.elapsed().as_secs()
         );
-        Ok((tx, msg_id))
+        Ok(block)
     }
 
     pub const fn state(&self) -> &nssa::V03State {
@@ -319,22 +339,19 @@ impl<BC: BlockSettlementClientTrait, IC: IndexerClientTrait> SequencerCore<BC, I
         &self.sequencer_config
     }
 
-    /// Deletes finalized blocks from the sequencer's pending block list.
-    /// This method must be called when new blocks are finalized on Bedrock.
-    /// All pending blocks with an ID less than or equal to `last_finalized_block_id`
-    /// are removed from the database.
-    pub fn clean_finalized_blocks_from_db(&mut self, last_finalized_block_id: u64) -> Result<()> {
-        self.get_pending_blocks()?
-            .iter()
-            .map(|block| block.header.block_id)
-            .min()
-            .map_or(Ok(()), |first_pending_block_id| {
-                info!("Clearing pending blocks up to id: {last_finalized_block_id}");
-                // TODO: Delete blocks instead of marking them as finalized.
-                // Current approach is used because we still have `GetBlockDataRequest`.
-                (first_pending_block_id..=last_finalized_block_id)
-                    .try_for_each(|id| self.store.mark_block_as_finalized(id))
-            })
+    /// Marks all pending blocks with `block_id <= last_finalized_block_id` as
+    /// finalized. Idempotent. Production callers don't invoke this directly —
+    /// it's wired up in `start_from_config` to the publisher's
+    /// `on_finalized_block` sink, which fires on `Event::TxsFinalized` /
+    /// `Event::FinalizedInscriptions`. Kept on the type for tests.
+    // TODO: Delete blocks instead of marking them as finalized. Current
+    // approach is used because we still have `GetBlockDataRequest`.
+    pub fn clean_finalized_blocks_from_db(&self, last_finalized_block_id: u64) -> Result<()> {
+        info!("Clearing pending blocks up to id: {last_finalized_block_id}");
+        self.store
+            .dbio()
+            .clean_pending_blocks_up_to(last_finalized_block_id)?;
+        Ok(())
     }
 
     /// Returns the list of stored pending blocks.
@@ -348,12 +365,8 @@ impl<BC: BlockSettlementClientTrait, IC: IndexerClientTrait> SequencerCore<BC, I
             .collect())
     }
 
-    pub fn block_settlement_client(&self) -> BC {
-        self.block_settlement_client.clone()
-    }
-
-    pub fn indexer_client(&self) -> IC {
-        self.indexer_client.clone()
+    pub fn block_publisher(&self) -> BP {
+        self.block_publisher.clone()
     }
 
     fn next_block_id(&self) -> u64 {
@@ -392,7 +405,6 @@ mod tests {
 
     use std::{pin::pin, time::Duration};
 
-    use bedrock_client::BackoffConfig;
     use common::{
         test_utils::sequencer_sign_key_for_testing,
         transaction::{NSSATransaction, clock_invocation},
@@ -420,16 +432,11 @@ mod tests {
             block_create_timeout: Duration::from_secs(1),
             signing_key: *sequencer_sign_key_for_testing().value(),
             bedrock_config: BedrockConfig {
-                backoff: BackoffConfig {
-                    start_delay: Duration::from_millis(100),
-                    max_retries: 5,
-                },
                 channel_id: ChannelId::from([0; 32]),
                 node_url: "http://not-used-in-unit-tests".parse().unwrap(),
                 auth: None,
             },
             retry_pending_blocks_timeout: Duration::from_mins(4),
-            indexer_rpc_url: "ws://localhost:8779".parse().unwrap(),
             initial_public_accounts: None,
             initial_private_accounts: None,
         }
@@ -457,9 +464,7 @@ mod tests {
         let tx = common::test_utils::produce_dummy_empty_transaction();
         mempool_handle.push(tx).await.unwrap();
 
-        sequencer
-            .produce_new_block_with_mempool_transactions()
-            .unwrap();
+        sequencer.produce_new_block().await.unwrap();
 
         (sequencer, mempool_handle)
     }
@@ -604,23 +609,21 @@ mod tests {
         assert!(poll.is_pending());
 
         // Empty the mempool by producing a block
-        sequencer
-            .produce_new_block_with_mempool_transactions()
-            .unwrap();
+        sequencer.produce_new_block().await.unwrap();
 
         // Resolve the pending push
         assert!(push_fut.await.is_ok());
     }
 
     #[tokio::test]
-    async fn produce_new_block_with_mempool_transactions() {
+    async fn build_block_from_mempool() {
         let (mut sequencer, mempool_handle) = common_setup().await;
         let genesis_height = sequencer.chain_height;
 
         let tx = common::test_utils::produce_dummy_empty_transaction();
         mempool_handle.push(tx).await.unwrap();
 
-        let result = sequencer.produce_new_block_with_mempool_transactions();
+        let result = sequencer.build_block_from_mempool();
         assert!(result.is_ok());
         assert_eq!(sequencer.chain_height, genesis_height + 1);
     }
@@ -645,9 +648,7 @@ mod tests {
         mempool_handle.push(tx_replay).await.unwrap();
 
         // Create block
-        sequencer
-            .produce_new_block_with_mempool_transactions()
-            .unwrap();
+        sequencer.produce_new_block().await.unwrap();
         let block = sequencer
             .store
             .get_block_at_id(sequencer.chain_height)
@@ -679,9 +680,7 @@ mod tests {
 
         // The transaction should be included the first time
         mempool_handle.push(tx.clone()).await.unwrap();
-        sequencer
-            .produce_new_block_with_mempool_transactions()
-            .unwrap();
+        sequencer.produce_new_block().await.unwrap();
         let block = sequencer
             .store
             .get_block_at_id(sequencer.chain_height)
@@ -697,9 +696,7 @@ mod tests {
 
         // Add same transaction should fail
         mempool_handle.push(tx.clone()).await.unwrap();
-        sequencer
-            .produce_new_block_with_mempool_transactions()
-            .unwrap();
+        sequencer.produce_new_block().await.unwrap();
         let block = sequencer
             .store
             .get_block_at_id(sequencer.chain_height)
@@ -738,9 +735,7 @@ mod tests {
             );
 
             mempool_handle.push(tx.clone()).await.unwrap();
-            sequencer
-                .produce_new_block_with_mempool_transactions()
-                .unwrap();
+            sequencer.produce_new_block().await.unwrap();
             let block = sequencer
                 .store
                 .get_block_at_id(sequencer.chain_height)
@@ -778,15 +773,9 @@ mod tests {
         let config = setup_sequencer_config();
         let (mut sequencer, _mempool_handle) =
             SequencerCoreWithMockClients::start_from_config(config).await;
-        sequencer
-            .produce_new_block_with_mempool_transactions()
-            .unwrap();
-        sequencer
-            .produce_new_block_with_mempool_transactions()
-            .unwrap();
-        sequencer
-            .produce_new_block_with_mempool_transactions()
-            .unwrap();
+        sequencer.produce_new_block().await.unwrap();
+        sequencer.produce_new_block().await.unwrap();
+        sequencer.produce_new_block().await.unwrap();
         assert_eq!(sequencer.get_pending_blocks().unwrap().len(), 4);
     }
 
@@ -795,15 +784,9 @@ mod tests {
         let config = setup_sequencer_config();
         let (mut sequencer, _mempool_handle) =
             SequencerCoreWithMockClients::start_from_config(config).await;
-        sequencer
-            .produce_new_block_with_mempool_transactions()
-            .unwrap();
-        sequencer
-            .produce_new_block_with_mempool_transactions()
-            .unwrap();
-        sequencer
-            .produce_new_block_with_mempool_transactions()
-            .unwrap();
+        sequencer.produce_new_block().await.unwrap();
+        sequencer.produce_new_block().await.unwrap();
+        sequencer.produce_new_block().await.unwrap();
 
         let last_finalized_block = 3;
         sequencer
@@ -836,9 +819,7 @@ mod tests {
             );
 
             mempool_handle.push(tx).await.unwrap();
-            sequencer
-                .produce_new_block_with_mempool_transactions()
-                .unwrap();
+            sequencer.produce_new_block().await.unwrap();
 
             // Get the metadata of the last block produced
             sequencer.store.latest_block_meta().unwrap()
@@ -861,9 +842,7 @@ mod tests {
         mempool_handle.push(tx.clone()).await.unwrap();
 
         // Step 4: Produce new block
-        sequencer
-            .produce_new_block_with_mempool_transactions()
-            .unwrap();
+        sequencer.produce_new_block().await.unwrap();
 
         // Step 5: Verify the new block has correct previous block metadata
         let new_block = sequencer
@@ -876,10 +855,6 @@ mod tests {
             new_block.header.prev_block_hash, expected_prev_meta.hash,
             "New block's prev_block_hash should match the stored metadata hash"
         );
-        assert_eq!(
-            new_block.bedrock_parent_id, expected_prev_meta.msg_id,
-            "New block's bedrock_parent_id should match the stored metadata msg_id"
-        );
         assert_eq!(
             new_block.body.transactions,
             vec![
@@ -914,9 +889,7 @@ mod tests {
             .await
             .unwrap();
         mempool_handle.push(crafted_clock_tx).await.unwrap();
-        sequencer
-            .produce_new_block_with_mempool_transactions()
-            .unwrap();
+        sequencer.produce_new_block().await.unwrap();
 
         let block = sequencer
             .store
@@ -949,15 +922,11 @@ mod tests {
             // Produce multiple blocks to advance chain height
             let tx = common::test_utils::produce_dummy_empty_transaction();
             mempool_handle.push(tx).await.unwrap();
-            sequencer
-                .produce_new_block_with_mempool_transactions()
-                .unwrap();
+            sequencer.produce_new_block().await.unwrap();
 
             let tx = common::test_utils::produce_dummy_empty_transaction();
             mempool_handle.push(tx).await.unwrap();
-            sequencer
-                .produce_new_block_with_mempool_transactions()
-                .unwrap();
+            sequencer.produce_new_block().await.unwrap();
 
             // Return the current chain height (should be genesis_id + 2)
             sequencer.chain_height
@@ -994,9 +963,7 @@ mod tests {
                 ),
             ));
         mempool_handle.push(deploy_tx).await.unwrap();
-        sequencer
-            .produce_new_block_with_mempool_transactions()
-            .unwrap();
+        sequencer.produce_new_block().await.unwrap();
 
         // Build a user transaction that invokes clock_chain_caller, which in turn chain-calls the
         // clock program with the clock accounts. The sequencer should detect that the resulting
@@ -1021,9 +988,7 @@ mod tests {
         ));
 
         mempool_handle.push(user_tx).await.unwrap();
-        sequencer
-            .produce_new_block_with_mempool_transactions()
-            .unwrap();
+        sequencer.produce_new_block().await.unwrap();
 
         let block = sequencer
             .store
@@ -1057,7 +1022,7 @@ mod tests {
         mempool_handle.push(tx).await.unwrap();
 
         // Block production must fail because the appended clock tx cannot execute.
-        let result = sequencer.produce_new_block_with_mempool_transactions();
+        let result = sequencer.produce_new_block().await;
         assert!(
             result.is_err(),
             "Block production should abort when clock account data is corrupted"
@@ -1076,7 +1041,7 @@ mod tests {
             program::Program,
         };
         use nssa_core::{
-            SharedSecretKey,
+            InputAccountIdentity, SharedSecretKey,
             account::AccountWithMetadata,
             encryption::{EphemeralPublicKey, EphemeralSecretKey, ViewingPublicKey},
         };
@@ -1114,10 +1079,11 @@ mod tests {
                 (&npk, 0),
             )],
             Program::serialize_instruction(0_u128).unwrap(),
-            vec![1],
-            vec![(npk, 0, shared_secret)],
-            vec![nsk],
-            vec![None],
+            vec![InputAccountIdentity::PrivateAuthorizedInit {
+                ssk: shared_secret,
+                nsk,
+                identifier: 0,
+            }],
             &Program::authenticated_transfer_program().into(),
         )
         .unwrap();
diff --git a/sequencer/core/src/mock.rs b/sequencer/core/src/mock.rs
index 45a682e2..ebe6ea5d 100644
--- a/sequencer/core/src/mock.rs
+++ b/sequencer/core/src/mock.rs
@@ -1,76 +1,34 @@
-use anyhow::{Result, anyhow};
-use bedrock_client::SignedMantleTx;
-use logos_blockchain_core::mantle::ops::channel::ChannelId;
+use std::time::Duration;
+
+use anyhow::Result;
+use common::block::Block;
 use logos_blockchain_key_management_system_service::keys::Ed25519Key;
-use url::Url;
 
 use crate::{
-    block_settlement_client::BlockSettlementClientTrait, config::BedrockConfig,
-    indexer_client::IndexerClientTrait,
+    block_publisher::{
+        BlockPublisherTrait, CheckpointSink, FinalizedBlockSink, SequencerCheckpoint,
+    },
+    config::BedrockConfig,
 };
 
-pub type SequencerCoreWithMockClients =
-    crate::SequencerCore<MockBlockSettlementClient, MockIndexerClient>;
+pub type SequencerCoreWithMockClients = crate::SequencerCore<MockBlockPublisher>;
 
 #[derive(Clone)]
-pub struct MockBlockSettlementClient {
-    bedrock_channel_id: ChannelId,
-    bedrock_signing_key: Ed25519Key,
-}
+pub struct MockBlockPublisher;
 
-impl BlockSettlementClientTrait for MockBlockSettlementClient {
-    fn new(config: &BedrockConfig, signing_key: Ed25519Key) -> Result<Self> {
-        Ok(Self {
-            bedrock_channel_id: config.channel_id,
-            bedrock_signing_key: signing_key,
-        })
+impl BlockPublisherTrait for MockBlockPublisher {
+    async fn new(
+        _config: &BedrockConfig,
+        _bedrock_signing_key: Ed25519Key,
+        _resubmit_interval: Duration,
+        _initial_checkpoint: Option<SequencerCheckpoint>,
+        _on_checkpoint: CheckpointSink,
+        _on_finalized_block: FinalizedBlockSink,
+    ) -> Result<Self> {
+        Ok(Self)
     }
 
-    fn bedrock_channel_id(&self) -> ChannelId {
-        self.bedrock_channel_id
-    }
-
-    fn bedrock_signing_key(&self) -> &Ed25519Key {
-        &self.bedrock_signing_key
-    }
-
-    async fn submit_inscribe_tx_to_bedrock(&self, _tx: SignedMantleTx) -> Result<()> {
+    async fn publish_block(&self, _block: &Block) -> Result<()> {
         Ok(())
     }
 }
-
-#[derive(Clone)]
-pub struct MockBlockSettlementClientWithError {
-    bedrock_channel_id: ChannelId,
-    bedrock_signing_key: Ed25519Key,
-}
-
-impl BlockSettlementClientTrait for MockBlockSettlementClientWithError {
-    fn new(config: &BedrockConfig, signing_key: Ed25519Key) -> Result<Self> {
-        Ok(Self {
-            bedrock_channel_id: config.channel_id,
-            bedrock_signing_key: signing_key,
-        })
-    }
-
-    fn bedrock_channel_id(&self) -> ChannelId {
-        self.bedrock_channel_id
-    }
-
-    fn bedrock_signing_key(&self) -> &Ed25519Key {
-        &self.bedrock_signing_key
-    }
-
-    async fn submit_inscribe_tx_to_bedrock(&self, _tx: SignedMantleTx) -> Result<()> {
-        Err(anyhow!("Mock error"))
-    }
-}
-
-#[derive(Copy, Clone)]
-pub struct MockIndexerClient;
-
-impl IndexerClientTrait for MockIndexerClient {
-    async fn new(_indexer_url: &Url) -> Result<Self> {
-        Ok(Self)
-    }
-}
diff --git a/sequencer/service/Cargo.toml b/sequencer/service/Cargo.toml
index 6fee808c..beed6be2 100644
--- a/sequencer/service/Cargo.toml
+++ b/sequencer/service/Cargo.toml
@@ -14,7 +14,6 @@ mempool.workspace = true
 sequencer_core = { workspace = true, features = ["testnet"] }
 sequencer_service_protocol.workspace = true
 sequencer_service_rpc = { workspace = true, features = ["server"] }
-indexer_service_rpc = { workspace = true, features = ["client"] }
 
 clap = { workspace = true, features = ["derive", "env"] }
 anyhow.workspace = true
diff --git a/sequencer/service/src/lib.rs b/sequencer/service/src/lib.rs
index 5373b31f..319b75ad 100644
--- a/sequencer/service/src/lib.rs
+++ b/sequencer/service/src/lib.rs
@@ -5,15 +5,13 @@ use bytesize::ByteSize;
 use common::transaction::NSSATransaction;
 use futures::never::Never;
 use jsonrpsee::server::ServerHandle;
-#[cfg(not(feature = "standalone"))]
-use log::warn;
 use log::{error, info};
 use mempool::MemPoolHandle;
+#[cfg(not(feature = "standalone"))]
+use sequencer_core::SequencerCore;
 #[cfg(feature = "standalone")]
 use sequencer_core::SequencerCoreWithMockClients as SequencerCore;
 pub use sequencer_core::config::*;
-#[cfg(not(feature = "standalone"))]
-use sequencer_core::{SequencerCore, block_settlement_client::BlockSettlementClientTrait as _};
 use sequencer_service_rpc::RpcServer as _;
 use tokio::{sync::Mutex, task::JoinHandle};
 
@@ -29,8 +27,6 @@ pub struct SequencerHandle {
     /// Option because of `Drop` which forbids to simply move out of `self` in `stopped()`.
     server_handle: Option<ServerHandle>,
     main_loop_handle: JoinHandle<Result<Never>>,
-    retry_pending_blocks_loop_handle: JoinHandle<Result<Never>>,
-    listen_for_bedrock_blocks_loop_handle: JoinHandle<Result<Never>>,
 }
 
 impl SequencerHandle {
@@ -38,15 +34,11 @@ impl SequencerHandle {
         addr: SocketAddr,
         server_handle: ServerHandle,
         main_loop_handle: JoinHandle<Result<Never>>,
-        retry_pending_blocks_loop_handle: JoinHandle<Result<Never>>,
-        listen_for_bedrock_blocks_loop_handle: JoinHandle<Result<Never>>,
     ) -> Self {
         Self {
             addr,
             server_handle: Some(server_handle),
             main_loop_handle,
-            retry_pending_blocks_loop_handle,
-            listen_for_bedrock_blocks_loop_handle,
         }
     }
 
@@ -60,8 +52,6 @@ impl SequencerHandle {
             addr: _,
             server_handle,
             main_loop_handle,
-            retry_pending_blocks_loop_handle,
-            listen_for_bedrock_blocks_loop_handle,
         } = &mut self;
 
         let server_handle = server_handle.take().expect("Server handle is set");
@@ -75,16 +65,6 @@ impl SequencerHandle {
                    .context("Main loop task panicked")?
                    .context("Main loop exited unexpectedly")
             }
-            res = retry_pending_blocks_loop_handle => {
-                res
-                   .context("Retry pending blocks loop task panicked")?
-                   .context("Retry pending blocks loop exited unexpectedly")
-            }
-            res = listen_for_bedrock_blocks_loop_handle => {
-                res
-                   .context("Listen for bedrock blocks loop task panicked")?
-                   .context("Listen for bedrock blocks loop exited unexpectedly")
-            }
         }
     }
 
@@ -98,14 +78,10 @@ impl SequencerHandle {
             addr: _,
             server_handle,
             main_loop_handle,
-            retry_pending_blocks_loop_handle,
-            listen_for_bedrock_blocks_loop_handle,
         } = self;
 
         let stopped = server_handle.as_ref().is_none_or(ServerHandle::is_stopped)
-            || main_loop_handle.is_finished()
-            || retry_pending_blocks_loop_handle.is_finished()
-            || listen_for_bedrock_blocks_loop_handle.is_finished();
+            || main_loop_handle.is_finished();
         !stopped
     }
 
@@ -121,13 +97,9 @@ impl Drop for SequencerHandle {
             addr: _,
             server_handle,
             main_loop_handle,
-            retry_pending_blocks_loop_handle,
-            listen_for_bedrock_blocks_loop_handle,
         } = self;
 
         main_loop_handle.abort();
-        retry_pending_blocks_loop_handle.abort();
-        listen_for_bedrock_blocks_loop_handle.abort();
 
         let Some(handle) = server_handle else {
             return;
@@ -141,7 +113,6 @@ impl Drop for SequencerHandle {
 
 pub async fn run(config: SequencerConfig, port: u16) -> Result<SequencerHandle> {
     let block_timeout = config.block_create_timeout;
-    let retry_pending_blocks_timeout = config.retry_pending_blocks_timeout;
     let max_block_size = config.max_block_size;
 
     let (sequencer_core, mempool_handle) = SequencerCore::start_from_config(config).await;
@@ -159,34 +130,10 @@ pub async fn run(config: SequencerConfig, port: u16) -> Result<SequencerHandle>
     .await?;
     info!("RPC server started");
 
-    #[cfg(not(feature = "standalone"))]
-    {
-        info!("Submitting stored pending blocks");
-        retry_pending_blocks(&seq_core_wrapped)
-            .await
-            .expect("Failed to submit pending blocks on startup");
-    }
-
     info!("Starting main sequencer loop");
-    let main_loop_handle = tokio::spawn(main_loop(Arc::clone(&seq_core_wrapped), block_timeout));
+    let main_loop_handle = tokio::spawn(main_loop(seq_core_wrapped, block_timeout));
 
-    info!("Starting pending block retry loop");
-    let retry_pending_blocks_loop_handle = tokio::spawn(retry_pending_blocks_loop(
-        Arc::clone(&seq_core_wrapped),
-        retry_pending_blocks_timeout,
-    ));
-
-    info!("Starting bedrock block listening loop");
-    let listen_for_bedrock_blocks_loop_handle =
-        tokio::spawn(listen_for_bedrock_blocks_loop(seq_core_wrapped));
-
-    Ok(SequencerHandle::new(
-        addr,
-        server_handle,
-        main_loop_handle,
-        retry_pending_blocks_loop_handle,
-        listen_for_bedrock_blocks_loop_handle,
-    ))
+    Ok(SequencerHandle::new(addr, server_handle, main_loop_handle))
 }
 
 async fn run_server(
@@ -235,118 +182,3 @@ async fn main_loop(seq_core: Arc<Mutex<SequencerCore>>, block_timeout: Duration)
         info!("Waiting for new transactions");
     }
 }
-
-#[cfg(not(feature = "standalone"))]
-async fn retry_pending_blocks(seq_core: &Arc<Mutex<SequencerCore>>) -> Result<()> {
-    use std::time::Instant;
-
-    use log::debug;
-
-    let (mut pending_blocks, block_settlement_client) = {
-        let sequencer_core = seq_core.lock().await;
-        let client = sequencer_core.block_settlement_client();
-        let pending_blocks = sequencer_core
-            .get_pending_blocks()
-            .expect("Sequencer should be able to retrieve pending blocks");
-        (pending_blocks, client)
-    };
-
-    pending_blocks.sort_by(|block1, block2| block1.header.block_id.cmp(&block2.header.block_id));
-
-    if !pending_blocks.is_empty() {
-        info!(
-            "Resubmitting blocks from {} to {}",
-            pending_blocks.first().unwrap().header.block_id,
-            pending_blocks.last().unwrap().header.block_id
-        );
-    }
-
-    for block in &pending_blocks {
-        debug!(
-            "Resubmitting pending block with id {}",
-            block.header.block_id
-        );
-        // TODO: We could cache the inscribe tx for each pending block to avoid re-creating it
-        // on every retry.
-        let now = Instant::now();
-        let (tx, _msg_id) = block_settlement_client
-            .create_inscribe_tx(block)
-            .context("Failed to create inscribe tx for pending block")?;
-
-        debug!("Create inscribe: {:?}", now.elapsed());
-
-        let now = Instant::now();
-        if let Err(e) = block_settlement_client
-            .submit_inscribe_tx_to_bedrock(tx)
-            .await
-        {
-            warn!(
-                "Failed to resubmit block with id {} with error {e:#}",
-                block.header.block_id
-            );
-        }
-        debug!("Post: {:?}", now.elapsed());
-    }
-    Ok(())
-}
-
-#[cfg(not(feature = "standalone"))]
-async fn retry_pending_blocks_loop(
-    seq_core: Arc<Mutex<SequencerCore>>,
-    retry_pending_blocks_timeout: Duration,
-) -> Result<Never> {
-    loop {
-        tokio::time::sleep(retry_pending_blocks_timeout).await;
-        retry_pending_blocks(&seq_core).await?;
-    }
-}
-
-#[cfg(not(feature = "standalone"))]
-async fn listen_for_bedrock_blocks_loop(seq_core: Arc<Mutex<SequencerCore>>) -> Result<Never> {
-    use indexer_service_rpc::RpcClient as _;
-
-    let indexer_client = seq_core.lock().await.indexer_client();
-
-    let retry_delay = Duration::from_secs(5);
-
-    loop {
-        // TODO: Subscribe from the first pending block ID?
-        let mut subscription = indexer_client
-            .subscribe_to_finalized_blocks()
-            .await
-            .context("Failed to subscribe to finalized blocks")?;
-
-        while let Some(block_id) = subscription.next().await {
-            let block_id = block_id.context("Failed to get next block from subscription")?;
-
-            info!("Received new L2 block with ID {block_id}");
-
-            seq_core
-                .lock()
-                .await
-                .clean_finalized_blocks_from_db(block_id)
-                .with_context(|| {
-                    format!("Failed to clean finalized blocks from DB for block ID {block_id}")
-                })?;
-        }
-
-        warn!(
-            "Block subscription closed unexpectedly, reason: {:?}, retrying after {retry_delay:?}",
-            subscription.close_reason()
-        );
-        tokio::time::sleep(retry_delay).await;
-    }
-}
-
-#[cfg(feature = "standalone")]
-async fn listen_for_bedrock_blocks_loop(_seq_core: Arc<Mutex<SequencerCore>>) -> Result<Never> {
-    std::future::pending::<Result<Never>>().await
-}
-
-#[cfg(feature = "standalone")]
-async fn retry_pending_blocks_loop(
-    _seq_core: Arc<Mutex<SequencerCore>>,
-    _retry_pending_blocks_timeout: Duration,
-) -> Result<Never> {
-    std::future::pending::<Result<Never>>().await
-}
diff --git a/sequencer/service/src/service.rs b/sequencer/service/src/service.rs
index 71645363..0bb8e1dd 100644
--- a/sequencer/service/src/service.rs
+++ b/sequencer/service/src/service.rs
@@ -8,10 +8,7 @@ use jsonrpsee::{
 use log::warn;
 use mempool::MemPoolHandle;
 use nssa::{self, program::Program};
-use sequencer_core::{
-    DbError, SequencerCore, block_settlement_client::BlockSettlementClientTrait,
-    indexer_client::IndexerClientTrait,
-};
+use sequencer_core::{DbError, SequencerCore, block_publisher::BlockPublisherTrait};
 use sequencer_service_protocol::{
     Account, AccountId, Block, BlockId, Commitment, HashType, MembershipProof, Nonce, ProgramId,
 };
@@ -19,15 +16,15 @@ use tokio::sync::Mutex;
 
 const NOT_FOUND_ERROR_CODE: i32 = -31999;
 
-pub struct SequencerService<BC: BlockSettlementClientTrait, IC: IndexerClientTrait> {
-    sequencer: Arc<Mutex<SequencerCore<BC, IC>>>,
+pub struct SequencerService<BC: BlockPublisherTrait> {
+    sequencer: Arc<Mutex<SequencerCore<BC>>>,
     mempool_handle: MemPoolHandle<NSSATransaction>,
     max_block_size: u64,
 }
 
-impl<BC: BlockSettlementClientTrait, IC: IndexerClientTrait> SequencerService<BC, IC> {
+impl<BC: BlockPublisherTrait> SequencerService<BC> {
     pub const fn new(
-        sequencer: Arc<Mutex<SequencerCore<BC, IC>>>,
+        sequencer: Arc<Mutex<SequencerCore<BC>>>,
         mempool_handle: MemPoolHandle<NSSATransaction>,
         max_block_size: u64,
     ) -> Self {
@@ -40,8 +37,8 @@ impl<BC: BlockSettlementClientTrait, IC: IndexerClientTrait> SequencerService<BC
 }
 
 #[async_trait]
-impl<BC: BlockSettlementClientTrait + Send + 'static, IC: IndexerClientTrait + Send + 'static>
-    sequencer_service_rpc::RpcServer for SequencerService<BC, IC>
+impl<BC: BlockPublisherTrait + Send + 'static> sequencer_service_rpc::RpcServer
+    for SequencerService<BC>
 {
     async fn send_transaction(&self, tx: NSSATransaction) -> Result<HashType, ErrorObjectOwned> {
         // Reserve ~200 bytes for block header overhead
diff --git a/storage/src/indexer/indexer_cells.rs b/storage/src/indexer/indexer_cells.rs
index 76a2c035..615902bd 100644
--- a/storage/src/indexer/indexer_cells.rs
+++ b/storage/src/indexer/indexer_cells.rs
@@ -8,7 +8,8 @@ use crate::{
     indexer::{
         ACC_NUM_CELL_NAME, BLOCK_HASH_CELL_NAME, BREAKPOINT_CELL_NAME, CF_ACC_META,
         CF_BREAKPOINT_NAME, CF_HASH_TO_ID, CF_TX_TO_ID, DB_META_LAST_BREAKPOINT_ID,
-        DB_META_LAST_OBSERVED_L1_LIB_HEADER_ID_IN_DB_KEY, TX_HASH_CELL_NAME,
+        DB_META_LAST_OBSERVED_L1_LIB_HEADER_ID_IN_DB_KEY, DB_META_ZONE_SDK_INDEXER_CURSOR_KEY,
+        TX_HASH_CELL_NAME,
     },
 };
 
@@ -211,6 +212,41 @@ impl SimpleWritableCell for AccNumTxCell {
     }
 }
 
+/// Opaque bytes for the zone-sdk indexer cursor `Option<(MsgId, Slot)>`.
+/// The caller serializes via `serde_json` (neither type derives borsh).
+#[derive(BorshDeserialize)]
+pub struct ZoneSdkIndexerCursorCellOwned(pub Vec<u8>);
+
+impl SimpleStorableCell for ZoneSdkIndexerCursorCellOwned {
+    type KeyParams = ();
+
+    const CELL_NAME: &'static str = DB_META_ZONE_SDK_INDEXER_CURSOR_KEY;
+    const CF_NAME: &'static str = CF_META_NAME;
+}
+
+impl SimpleReadableCell for ZoneSdkIndexerCursorCellOwned {}
+
+#[derive(BorshSerialize)]
+pub struct ZoneSdkIndexerCursorCellRef<'bytes>(pub &'bytes [u8]);
+
+impl SimpleStorableCell for ZoneSdkIndexerCursorCellRef<'_> {
+    type KeyParams = ();
+
+    const CELL_NAME: &'static str = DB_META_ZONE_SDK_INDEXER_CURSOR_KEY;
+    const CF_NAME: &'static str = CF_META_NAME;
+}
+
+impl SimpleWritableCell for ZoneSdkIndexerCursorCellRef<'_> {
+    fn value_constructor(&self) -> DbResult<Vec<u8>> {
+        borsh::to_vec(&self).map_err(|err| {
+            DbError::borsh_cast_message(
+                err,
+                Some("Failed to serialize zone-sdk indexer cursor cell".to_owned()),
+            )
+        })
+    }
+}
+
 #[cfg(test)]
 mod uniform_tests {
     use crate::{
diff --git a/storage/src/indexer/mod.rs b/storage/src/indexer/mod.rs
index 7ef21258..75538835 100644
--- a/storage/src/indexer/mod.rs
+++ b/storage/src/indexer/mod.rs
@@ -22,6 +22,8 @@ pub const DB_META_LAST_OBSERVED_L1_LIB_HEADER_ID_IN_DB_KEY: &str =
     "last_observed_l1_lib_header_in_db";
 /// Key base for storing metainformation about the last breakpoint.
 pub const DB_META_LAST_BREAKPOINT_ID: &str = "last_breakpoint_id";
+/// Key base for storing the zone-sdk indexer cursor (opaque bytes).
+pub const DB_META_ZONE_SDK_INDEXER_CURSOR_KEY: &str = "zone_sdk_indexer_cursor";
 
 /// Cell name for a breakpoint.
 pub const BREAKPOINT_CELL_NAME: &str = "breakpoint";
diff --git a/storage/src/indexer/read_once.rs b/storage/src/indexer/read_once.rs
index b1ae0ada..8ab7fd23 100644
--- a/storage/src/indexer/read_once.rs
+++ b/storage/src/indexer/read_once.rs
@@ -4,7 +4,7 @@ use crate::{
     cells::shared_cells::{BlockCell, FirstBlockCell, FirstBlockSetCell, LastBlockCell},
     indexer::indexer_cells::{
         AccNumTxCell, BlockHashToBlockIdMapCell, BreakpointCellOwned, LastBreakpointIdCell,
-        LastObservedL1LibHeaderCell, TxHashToBlockIdMapCell,
+        LastObservedL1LibHeaderCell, TxHashToBlockIdMapCell, ZoneSdkIndexerCursorCellOwned,
     },
 };
 
@@ -64,4 +64,10 @@ impl RocksDBIO {
         self.get_opt::<AccNumTxCell>(acc_id)
             .map(|opt| opt.map(|cell| cell.0))
     }
+
+    pub fn get_zone_sdk_indexer_cursor_bytes(&self) -> DbResult<Option<Vec<u8>>> {
+        Ok(self
+            .get_opt::<ZoneSdkIndexerCursorCellOwned>(())?
+            .map(|cell| cell.0))
+    }
 }
diff --git a/storage/src/indexer/write_non_atomic.rs b/storage/src/indexer/write_non_atomic.rs
index 62b466a2..505360fa 100644
--- a/storage/src/indexer/write_non_atomic.rs
+++ b/storage/src/indexer/write_non_atomic.rs
@@ -4,6 +4,7 @@ use crate::{
     cells::shared_cells::{FirstBlockSetCell, LastBlockCell},
     indexer::indexer_cells::{
         BreakpointCellRef, LastBreakpointIdCell, LastObservedL1LibHeaderCell,
+        ZoneSdkIndexerCursorCellRef,
     },
 };
 
@@ -30,6 +31,10 @@ impl RocksDBIO {
         self.put(&FirstBlockSetCell(true), ())
     }
 
+    pub fn put_zone_sdk_indexer_cursor_bytes(&self, bytes: &[u8]) -> DbResult<()> {
+        self.put(&ZoneSdkIndexerCursorCellRef(bytes), ())
+    }
+
     // State
 
     pub fn put_breakpoint(&self, br_id: u64, breakpoint: &V03State) -> DbResult<()> {
diff --git a/storage/src/sequencer/mod.rs b/storage/src/sequencer/mod.rs
index 508f6c29..537d198d 100644
--- a/storage/src/sequencer/mod.rs
+++ b/storage/src/sequencer/mod.rs
@@ -12,7 +12,7 @@ use crate::{
     error::DbError,
     sequencer::sequencer_cells::{
         LastFinalizedBlockIdCell, LatestBlockMetaCellOwned, LatestBlockMetaCellRef,
-        NSSAStateCellOwned, NSSAStateCellRef,
+        NSSAStateCellOwned, NSSAStateCellRef, ZoneSdkCheckpointCellOwned, ZoneSdkCheckpointCellRef,
     },
 };
 
@@ -22,6 +22,8 @@ pub mod sequencer_cells;
 pub const DB_META_LAST_FINALIZED_BLOCK_ID: &str = "last_finalized_block_id";
 /// Key base for storing metainformation about the latest block meta.
 pub const DB_META_LATEST_BLOCK_META_KEY: &str = "latest_block_meta";
+/// Key base for storing the zone-sdk sequencer checkpoint (opaque bytes).
+pub const DB_META_ZONE_SDK_CHECKPOINT_KEY: &str = "zone_sdk_checkpoint";
 
 /// Key base for storing the NSSA state.
 pub const DB_NSSA_STATE_KEY: &str = "nssa_state";
@@ -205,6 +207,16 @@ impl RocksDBIO {
         self.get::<LatestBlockMetaCellOwned>(()).map(|val| val.0)
     }
 
+    pub fn get_zone_sdk_checkpoint_bytes(&self) -> DbResult<Option<Vec<u8>>> {
+        Ok(self
+            .get_opt::<ZoneSdkCheckpointCellOwned>(())?
+            .map(|cell| cell.0))
+    }
+
+    pub fn put_zone_sdk_checkpoint_bytes(&self, bytes: &[u8]) -> DbResult<()> {
+        self.put(&ZoneSdkCheckpointCellRef(bytes), ())
+    }
+
     pub fn put_block(
         &self,
         block: &Block,
@@ -275,6 +287,22 @@ impl RocksDBIO {
         Ok(())
     }
 
+    /// Mark every pending block with `block_id <= last_finalized` as finalized.
+    /// Idempotent — already-finalized blocks are skipped.
+    pub fn clean_pending_blocks_up_to(&self, last_finalized: u64) -> DbResult<()> {
+        let pending_ids: Vec<u64> = self
+            .get_all_blocks()
+            .filter_map(Result::ok)
+            .filter(|b| matches!(b.bedrock_status, BedrockStatus::Pending))
+            .map(|b| b.header.block_id)
+            .filter(|id| *id <= last_finalized)
+            .collect();
+        for id in pending_ids {
+            self.mark_block_as_finalized(id)?;
+        }
+        Ok(())
+    }
+
     pub fn mark_block_as_finalized(&self, block_id: u64) -> DbResult<()> {
         let mut block = self.get_block(block_id)?.ok_or_else(|| {
             DbError::db_interaction_error(format!("Block with id {block_id} not found"))
diff --git a/storage/src/sequencer/sequencer_cells.rs b/storage/src/sequencer/sequencer_cells.rs
index 0ad092d7..2bf65367 100644
--- a/storage/src/sequencer/sequencer_cells.rs
+++ b/storage/src/sequencer/sequencer_cells.rs
@@ -8,7 +8,7 @@ use crate::{
     error::DbError,
     sequencer::{
         CF_NSSA_STATE_NAME, DB_META_LAST_FINALIZED_BLOCK_ID, DB_META_LATEST_BLOCK_META_KEY,
-        DB_NSSA_STATE_KEY,
+        DB_META_ZONE_SDK_CHECKPOINT_KEY, DB_NSSA_STATE_KEY,
     },
 };
 
@@ -95,6 +95,42 @@ impl SimpleWritableCell for LatestBlockMetaCellRef<'_> {
     }
 }
 
+/// Opaque bytes for the zone-sdk sequencer checkpoint. The caller is
+/// responsible for the actual encoding (we use `serde_json` since
+/// `SequencerCheckpoint` only derives serde, not borsh).
+#[derive(BorshDeserialize)]
+pub struct ZoneSdkCheckpointCellOwned(pub Vec<u8>);
+
+impl SimpleStorableCell for ZoneSdkCheckpointCellOwned {
+    type KeyParams = ();
+
+    const CELL_NAME: &'static str = DB_META_ZONE_SDK_CHECKPOINT_KEY;
+    const CF_NAME: &'static str = CF_META_NAME;
+}
+
+impl SimpleReadableCell for ZoneSdkCheckpointCellOwned {}
+
+#[derive(BorshSerialize)]
+pub struct ZoneSdkCheckpointCellRef<'bytes>(pub &'bytes [u8]);
+
+impl SimpleStorableCell for ZoneSdkCheckpointCellRef<'_> {
+    type KeyParams = ();
+
+    const CELL_NAME: &'static str = DB_META_ZONE_SDK_CHECKPOINT_KEY;
+    const CF_NAME: &'static str = CF_META_NAME;
+}
+
+impl SimpleWritableCell for ZoneSdkCheckpointCellRef<'_> {
+    fn value_constructor(&self) -> DbResult<Vec<u8>> {
+        borsh::to_vec(&self).map_err(|err| {
+            DbError::borsh_cast_message(
+                err,
+                Some("Failed to serialize zone-sdk checkpoint cell".to_owned()),
+            )
+        })
+    }
+}
+
 #[cfg(test)]
 mod uniform_tests {
     use crate::{
diff --git a/test_program_methods/guest/src/bin/auth_transfer_proxy.rs b/test_program_methods/guest/src/bin/auth_transfer_proxy.rs
new file mode 100644
index 00000000..17316f16
--- /dev/null
+++ b/test_program_methods/guest/src/bin/auth_transfer_proxy.rs
@@ -0,0 +1,97 @@
+use nssa_core::program::{
+    AccountPostState, ChainedCall, PdaSeed, ProgramId, ProgramInput, ProgramOutput,
+    read_nssa_inputs,
+};
+
+/// PDA authorization program that delegates balance operations to `authenticated_transfer`.
+///
+/// The PDA is owned by `authenticated_transfer`, not by this program. This program's role
+/// is solely to provide PDA authorization via `pda_seeds` in chained calls.
+///
+/// Instruction: `(pda_seed, auth_transfer_id, amount, is_withdraw)`.
+///
+/// **Init** (`is_withdraw = false`, 1 pre-state `[pda]`):
+/// Chains to `authenticated_transfer` with `instruction=0` (init path) and `pda_seeds=[seed]`
+/// to initialize the PDA under `authenticated_transfer`'s ownership.
+///
+/// **Withdraw** (`is_withdraw = true`, 2 pre-states `[pda, recipient]`):
+/// Chains to `authenticated_transfer` with the amount and `pda_seeds=[seed]` to authorize
+/// the PDA for a balance transfer. The actual balance modification happens in
+/// `authenticated_transfer`, not here.
+///
+/// **Deposit**: done directly via `authenticated_transfer` (no need for this program).
+type Instruction = (PdaSeed, ProgramId, u128, bool);
+
+#[expect(
+    clippy::allow_attributes,
+    reason = "allow is needed because the clones are only redundant in test compilation"
+)]
+#[allow(
+    clippy::redundant_clone,
+    reason = "clones needed in non-test compilation"
+)]
+fn main() {
+    let (
+        ProgramInput {
+            self_program_id,
+            caller_program_id,
+            pre_states,
+            instruction: (pda_seed, auth_transfer_id, amount, is_withdraw),
+        },
+        instruction_words,
+    ) = read_nssa_inputs::<Instruction>();
+
+    if is_withdraw {
+        let Ok([pda_pre, recipient_pre]) = <[_; 2]>::try_from(pre_states.clone()) else {
+            panic!("expected exactly 2 pre_states for withdraw: [pda, recipient]");
+        };
+
+        // Post-states stay unchanged in this program. The actual balance transfer
+        // happens in the chained call to authenticated_transfer.
+        let pda_post = AccountPostState::new(pda_pre.account.clone());
+        let recipient_post = AccountPostState::new(recipient_pre.account.clone());
+
+        // Chain to authenticated_transfer with pda_seeds to authorize the PDA.
+        // The circuit's resolve_authorization_and_record_bindings establishes the
+        // private PDA (seed, npk) binding when pda_seeds match the private PDA derivation.
+        let mut auth_pda_pre = pda_pre;
+        auth_pda_pre.is_authorized = true;
+        let auth_call =
+            ChainedCall::new(auth_transfer_id, vec![auth_pda_pre, recipient_pre], &amount)
+                .with_pda_seeds(vec![pda_seed]);
+
+        ProgramOutput::new(
+            self_program_id,
+            caller_program_id,
+            instruction_words,
+            pre_states,
+            vec![pda_post, recipient_post],
+        )
+        .with_chained_calls(vec![auth_call])
+        .write();
+    } else {
+        // Init: initialize the PDA under authenticated_transfer's ownership.
+        let Ok([pda_pre]) = <[_; 1]>::try_from(pre_states.clone()) else {
+            panic!("expected exactly 1 pre_state for init: [pda]");
+        };
+
+        let pda_post = AccountPostState::new(pda_pre.account.clone());
+
+        // Chain to authenticated_transfer with instruction=0 (init path) and pda_seeds
+        // to authorize the PDA. authenticated_transfer will claim it with Claim::Authorized.
+        let mut auth_pda_pre = pda_pre;
+        auth_pda_pre.is_authorized = true;
+        let auth_call = ChainedCall::new(auth_transfer_id, vec![auth_pda_pre], &0_u128)
+            .with_pda_seeds(vec![pda_seed]);
+
+        ProgramOutput::new(
+            self_program_id,
+            caller_program_id,
+            instruction_words,
+            pre_states,
+            vec![pda_post],
+        )
+        .with_chained_calls(vec![auth_call])
+        .write();
+    }
+}
diff --git a/test_program_methods/guest/src/bin/pda_fund_spend_proxy.rs b/test_program_methods/guest/src/bin/pda_fund_spend_proxy.rs
new file mode 100644
index 00000000..c02261f9
--- /dev/null
+++ b/test_program_methods/guest/src/bin/pda_fund_spend_proxy.rs
@@ -0,0 +1,70 @@
+use nssa_core::{
+    account::AccountWithMetadata,
+    program::{
+        AccountPostState, ChainedCall, PdaSeed, ProgramId, ProgramInput, ProgramOutput,
+        read_nssa_inputs,
+    },
+};
+use risc0_zkvm::serde::to_vec;
+
+/// Proxy for interacting with private PDAs via `auth_transfer`.
+///
+/// The `is_fund` flag selects the operating mode:
+///
+/// - `false` (Spend): `pre_states = [pda (authorized), recipient]`. Debits the PDA. The PDA-to-npk
+///   binding is established via `pda_seeds` in the chained call to `auth_transfer`.
+///
+/// - `true` (Fund): `pre_states = [sender (authorized), pda (foreign/uninitialized)]`. Credits the
+///   PDA. A direct call to `auth_transfer` cannot bind the PDA because `auth_transfer` uses
+///   `Claim::Authorized`, not `Claim::Pda`. Routing through this proxy establishes the binding via
+///   `pda_seeds` in the chained call.
+type Instruction = (PdaSeed, u128, ProgramId, bool);
+
+fn main() {
+    let (
+        ProgramInput {
+            self_program_id,
+            caller_program_id,
+            pre_states,
+            instruction: (seed, amount, auth_transfer_id, is_fund),
+        },
+        instruction_words,
+    ) = read_nssa_inputs::<Instruction>();
+
+    let Ok([first, second]) = <[_; 2]>::try_from(pre_states) else {
+        return;
+    };
+
+    assert!(first.is_authorized, "first pre_state must be authorized");
+
+    let chained_pre_states = if is_fund {
+        let pda_authorized = AccountWithMetadata {
+            account: second.account.clone(),
+            account_id: second.account_id,
+            is_authorized: true,
+        };
+        vec![first.clone(), pda_authorized]
+    } else {
+        vec![first.clone(), second.clone()]
+    };
+
+    let first_post = AccountPostState::new(first.account.clone());
+    let second_post = AccountPostState::new(second.account.clone());
+
+    let chained_call = ChainedCall {
+        program_id: auth_transfer_id,
+        instruction_data: to_vec(&amount).unwrap(),
+        pre_states: chained_pre_states,
+        pda_seeds: vec![seed],
+    };
+
+    ProgramOutput::new(
+        self_program_id,
+        caller_program_id,
+        instruction_words,
+        vec![first, second],
+        vec![first_post, second_post],
+    )
+    .with_chained_calls(vec![chained_call])
+    .write();
+}
diff --git a/testnet_initial_state/src/lib.rs b/testnet_initial_state/src/lib.rs
index f6f1e288..b5c91d4d 100644
--- a/testnet_initial_state/src/lib.rs
+++ b/testnet_initial_state/src/lib.rs
@@ -103,7 +103,10 @@ pub struct PrivateAccountPrivateInitialData {
 impl PrivateAccountPrivateInitialData {
     #[must_use]
     pub fn account_id(&self) -> nssa::AccountId {
-        nssa::AccountId::from((&self.key_chain.nullifier_public_key, self.identifier))
+        nssa::AccountId::for_regular_private_account(
+            &self.key_chain.nullifier_public_key,
+            self.identifier,
+        )
     }
 }
 
@@ -208,7 +211,7 @@ pub fn initial_state() -> V03State {
             .iter()
             .map(|init_comm_data| {
                 let npk = &init_comm_data.npk;
-                let account_id = nssa::AccountId::from((npk, 0));
+                let account_id = nssa::AccountId::for_regular_private_account(npk, 0);
 
                 let mut acc = init_comm_data.account.clone();
 
diff --git a/wallet-ffi/Cargo.toml b/wallet-ffi/Cargo.toml
index 0af20a54..37d552ec 100644
--- a/wallet-ffi/Cargo.toml
+++ b/wallet-ffi/Cargo.toml
@@ -15,6 +15,7 @@ wallet.workspace = true
 nssa.workspace = true
 nssa_core.workspace = true
 sequencer_service_rpc = { workspace = true, features = ["client"] }
+
 tokio.workspace = true
 
 [build-dependencies]
diff --git a/wallet/src/chain_storage.rs b/wallet/src/chain_storage.rs
index 3bfdb383..1b883e2f 100644
--- a/wallet/src/chain_storage.rs
+++ b/wallet/src/chain_storage.rs
@@ -11,6 +11,7 @@ use key_protocol::{
 };
 use log::debug;
 use nssa::program::Program;
+use nssa_core::PrivateAccountKind;
 
 use crate::config::{InitialAccountData, Label, PersistentAccountData, WalletConfig};
 
@@ -78,8 +79,8 @@ impl WalletChainStore {
                 PersistentAccountData::Private(data) => {
                     let npk = data.data.value.0.nullifier_public_key;
                     let chain_index = data.chain_index;
-                    for identifier in &data.identifiers {
-                        let account_id = nssa::AccountId::from((&npk, *identifier));
+                    for kind in &data.kinds {
+                        let account_id = nssa::AccountId::for_private_account(&npk, kind);
                         private_tree
                             .account_id_map
                             .insert(account_id, chain_index.clone());
@@ -95,7 +96,10 @@ impl WalletChainStore {
                             data.account_id(),
                             UserPrivateAccountData {
                                 key_chain: data.key_chain,
-                                accounts: vec![(data.identifier, data.account)],
+                                accounts: vec![(
+                                    PrivateAccountKind::Regular(data.identifier),
+                                    data.account,
+                                )],
                             },
                         );
                     }
@@ -141,7 +145,7 @@ impl WalletChainStore {
                         account_id,
                         UserPrivateAccountData {
                             key_chain: data.key_chain,
-                            accounts: vec![(data.identifier, account)],
+                            accounts: vec![(PrivateAccountKind::Regular(data.identifier), account)],
                         },
                     );
                 }
@@ -196,7 +200,7 @@ impl WalletChainStore {
     pub fn insert_private_account_data(
         &mut self,
         account_id: nssa::AccountId,
-        identifier: nssa_core::Identifier,
+        kind: &PrivateAccountKind,
         account: nssa_core::account::Account,
     ) {
         debug!("inserting at address {account_id}, this account {account:?}");
@@ -208,10 +212,10 @@ impl WalletChainStore {
             .entry(account_id)
         {
             let entry = entry.get_mut();
-            if let Some((_, acc)) = entry.accounts.iter_mut().find(|(id, _)| *id == identifier) {
+            if let Some((_, acc)) = entry.accounts.iter_mut().find(|(k, _)| k == kind) {
                 *acc = account;
             } else {
-                entry.accounts.push((identifier, account));
+                entry.accounts.push((kind.clone(), account));
             }
             return;
         }
@@ -234,24 +238,21 @@ impl WalletChainStore {
                 .key_map
                 .get_mut(&chain_index)
             {
-                if let Some((_, acc)) = node.value.1.iter_mut().find(|(id, _)| *id == identifier) {
+                if let Some((_, acc)) = node.value.1.iter_mut().find(|(k, _)| k == kind) {
                     *acc = account;
                 } else {
-                    node.value.1.push((identifier, account));
+                    node.value.1.push((kind.clone(), account));
                 }
             }
         } else {
             // Node not yet in account_id_map — find it by checking all nodes
             for (ci, node) in &mut self.user_data.private_key_tree.key_map {
-                let expected_id =
-                    nssa::AccountId::from((&node.value.0.nullifier_public_key, identifier));
-                if expected_id == account_id {
-                    if let Some((_, acc)) =
-                        node.value.1.iter_mut().find(|(id, _)| *id == identifier)
-                    {
+                let npk = &node.value.0.nullifier_public_key;
+                if nssa::AccountId::for_private_account(npk, kind) == account_id {
+                    if let Some((_, acc)) = node.value.1.iter_mut().find(|(k, _)| k == kind) {
                         *acc = account;
                     } else {
-                        node.value.1.push((identifier, account));
+                        node.value.1.push((kind.clone(), account));
                     }
                     // Register in account_id_map
                     self.user_data
@@ -297,7 +298,7 @@ mod tests {
                 data: Some(public_data),
             }),
             PersistentAccountData::Private(Box::new(PersistentAccountDataPrivate {
-                identifiers: vec![],
+                kinds: vec![],
                 chain_index: ChainIndex::root(),
                 data: private_data,
             })),
diff --git a/wallet/src/cli/account.rs b/wallet/src/cli/account.rs
index 5ed99d90..e2ae12e7 100644
--- a/wallet/src/cli/account.rs
+++ b/wallet/src/cli/account.rs
@@ -89,6 +89,27 @@ pub enum NewSubcommand {
         /// Label to assign to the new account.
         label: Option<String>,
     },
+    /// Create a shared private account from a group's GMS.
+    PrivateGms {
+        /// Group name to derive keys from.
+        group: String,
+        #[arg(short, long)]
+        /// Label to assign to the new account.
+        label: Option<String>,
+        #[arg(long)]
+        /// Create a PDA account (requires --seed and --program-id).
+        pda: bool,
+        #[arg(long, requires = "pda")]
+        /// PDA seed as 64-character hex string.
+        seed: Option<String>,
+        #[arg(long, requires = "pda")]
+        /// Program ID as hex string.
+        program_id: Option<String>,
+        #[arg(long, requires = "pda")]
+        /// Identifier that diversifies this PDA within the (`program_id`, seed, npk) family.
+        /// Defaults to a random value if not specified.
+        identifier: Option<u128>,
+    },
     /// Recommended for receiving from multiple senders: creates a key node (npk + vpk) without
     /// registering any account.
     PrivateAccountsKey {
@@ -180,9 +201,73 @@ impl WalletSubcommand for NewSubcommand {
                 );
 
                 wallet_core.store_persistent_data().await?;
-
                 Ok(SubcommandReturnValue::RegisterAccount { account_id })
             }
+            Self::PrivateGms {
+                group,
+                label,
+                pda,
+                seed,
+                program_id,
+                identifier,
+            } => {
+                if let Some(label) = &label
+                    && wallet_core
+                        .storage
+                        .labels
+                        .values()
+                        .any(|l| l.to_string() == *label)
+                {
+                    anyhow::bail!("Label '{label}' is already in use by another account");
+                }
+
+                let info = if pda {
+                    let seed_hex = seed.context("--seed is required for PDA accounts")?;
+                    let pid_hex =
+                        program_id.context("--program-id is required for PDA accounts")?;
+
+                    let seed_bytes: [u8; 32] = hex::decode(&seed_hex)
+                        .context("Invalid seed hex")?
+                        .try_into()
+                        .map_err(|_err| anyhow::anyhow!("Seed must be exactly 32 bytes"))?;
+                    let pda_seed = nssa_core::program::PdaSeed::new(seed_bytes);
+
+                    let pid_bytes = hex::decode(&pid_hex).context("Invalid program ID hex")?;
+                    if pid_bytes.len() != 32 {
+                        anyhow::bail!("Program ID must be exactly 32 bytes");
+                    }
+                    let mut pid: nssa_core::program::ProgramId = [0; 8];
+                    for (i, chunk) in pid_bytes.chunks_exact(4).enumerate() {
+                        pid[i] = u32::from_le_bytes(chunk.try_into().unwrap());
+                    }
+
+                    wallet_core.create_shared_pda_account(
+                        &group,
+                        pda_seed,
+                        pid,
+                        identifier.unwrap_or_else(rand::random),
+                    )?
+                } else {
+                    wallet_core.create_shared_regular_account(&group)?
+                };
+
+                if let Some(label) = label {
+                    wallet_core
+                        .storage
+                        .labels
+                        .insert(info.account_id.to_string(), Label::new(label));
+                }
+
+                println!("Shared account from group '{group}'");
+                println!("AccountId: Private/{}", info.account_id);
+                println!("NPK: {}", hex::encode(info.npk.0));
+                println!("VPK: {}", hex::encode(&info.vpk.0));
+
+                wallet_core.store_persistent_data().await?;
+                Ok(SubcommandReturnValue::RegisterAccount {
+                    account_id: info.account_id,
+                })
+            }
             Self::PrivateAccountsKey { cci } => {
                 let chain_index = wallet_core.create_private_accounts_key(cci);
 
diff --git a/wallet/src/cli/group.rs b/wallet/src/cli/group.rs
new file mode 100644
index 00000000..e1dd9159
--- /dev/null
+++ b/wallet/src/cli/group.rs
@@ -0,0 +1,158 @@
+use anyhow::{Context as _, Result};
+use clap::Subcommand;
+use key_protocol::key_management::group_key_holder::{GroupKeyHolder, SealingPublicKey};
+
+use crate::{
+    WalletCore,
+    cli::{SubcommandReturnValue, WalletSubcommand},
+};
+
+/// Group key management commands.
+#[derive(Subcommand, Debug, Clone)]
+pub enum GroupSubcommand {
+    /// Create a new group with a fresh random GMS.
+    New {
+        /// Human-readable name for the group.
+        name: String,
+    },
+    /// List all groups.
+    #[command(visible_alias = "ls")]
+    List,
+    /// Remove a group from the wallet.
+    Remove {
+        /// Group name.
+        name: String,
+    },
+    /// Seal the group's GMS for a recipient (invite).
+    Invite {
+        /// Group name.
+        name: String,
+        /// Recipient's sealing public key as hex string.
+        #[arg(long)]
+        key: String,
+    },
+    /// Unseal a received GMS and store it (join a group).
+    /// Uses the wallet's dedicated sealing key (generated via `new-sealing-key`).
+    Join {
+        /// Human-readable name to store the group under.
+        name: String,
+        /// Sealed GMS as hex string (from the inviter).
+        #[arg(long)]
+        sealed: String,
+    },
+    /// Generate a dedicated sealing key pair for GMS distribution.
+    /// Share the printed public key with group members so they can seal GMS for you.
+    NewSealingKey,
+}
+
+impl WalletSubcommand for GroupSubcommand {
+    async fn handle_subcommand(
+        self,
+        wallet_core: &mut WalletCore,
+    ) -> Result<SubcommandReturnValue> {
+        match self {
+            Self::New { name } => {
+                if wallet_core
+                    .storage()
+                    .user_data
+                    .group_key_holder(&name)
+                    .is_some()
+                {
+                    anyhow::bail!("Group '{name}' already exists");
+                }
+
+                let holder = GroupKeyHolder::new();
+                wallet_core.insert_group_key_holder(name.clone(), holder);
+                wallet_core.store_persistent_data().await?;
+
+                println!("Created group '{name}'");
+                Ok(SubcommandReturnValue::Empty)
+            }
+
+            Self::List => {
+                let holders = &wallet_core.storage().user_data.group_key_holders;
+                if holders.is_empty() {
+                    println!("No groups found");
+                } else {
+                    for name in holders.keys() {
+                        println!("{name}");
+                    }
+                }
+                Ok(SubcommandReturnValue::Empty)
+            }
+
+            Self::Remove { name } => {
+                if wallet_core.remove_group_key_holder(&name).is_none() {
+                    anyhow::bail!("Group '{name}' not found");
+                }
+
+                wallet_core.store_persistent_data().await?;
+                println!("Removed group '{name}'");
+                Ok(SubcommandReturnValue::Empty)
+            }
+
+            Self::Invite { name, key } => {
+                let holder = wallet_core
+                    .storage()
+                    .user_data
+                    .group_key_holder(&name)
+                    .context(format!("Group '{name}' not found"))?;
+
+                let key_bytes = hex::decode(&key).context("Invalid key hex")?;
+                let recipient_key =
+                    key_protocol::key_management::group_key_holder::SealingPublicKey::from_bytes(
+                        key_bytes,
+                    );
+
+                let sealed = holder.seal_for(&recipient_key);
+                println!("{}", hex::encode(&sealed));
+                Ok(SubcommandReturnValue::Empty)
+            }
+
+            Self::Join { name, sealed } => {
+                if wallet_core
+                    .storage()
+                    .user_data
+                    .group_key_holder(&name)
+                    .is_some()
+                {
+                    anyhow::bail!("Group '{name}' already exists");
+                }
+
+                let sealing_key =
+                    wallet_core.storage().user_data.sealing_secret_key.context(
+                        "No sealing key found. Run 'wallet group new-sealing-key' first.",
+                    )?;
+
+                let sealed_bytes = hex::decode(&sealed).context("Invalid sealed hex")?;
+
+                let holder = GroupKeyHolder::unseal(&sealed_bytes, &sealing_key)
+                    .map_err(|e| anyhow::anyhow!("Failed to unseal: {e:?}"))?;
+
+                wallet_core.insert_group_key_holder(name.clone(), holder);
+                wallet_core.store_persistent_data().await?;
+
+                println!("Joined group '{name}'");
+                Ok(SubcommandReturnValue::Empty)
+            }
+
+            Self::NewSealingKey => {
+                if wallet_core.storage().user_data.sealing_secret_key.is_some() {
+                    anyhow::bail!("Sealing key already exists. Each wallet has one sealing key.");
+                }
+
+                let mut secret: nssa_core::encryption::Scalar = [0_u8; 32];
+                rand::RngCore::fill_bytes(&mut rand::rngs::OsRng, &mut secret);
+                let public_key = SealingPublicKey::from_scalar(secret);
+
+                wallet_core.set_sealing_secret_key(secret);
+                wallet_core.store_persistent_data().await?;
+
+                println!("Sealing key generated.");
+                println!("Public key: {}", hex::encode(public_key.to_bytes()));
+                println!("Share this public key with group members so they can seal GMS for you.");
+                Ok(SubcommandReturnValue::Empty)
+            }
+        }
+    }
+}
diff --git a/wallet/src/cli/mod.rs b/wallet/src/cli/mod.rs
index 17a90f79..df0ac840 100644
--- a/wallet/src/cli/mod.rs
+++ b/wallet/src/cli/mod.rs
@@ -16,6 +16,7 @@ use crate::{
         chain::ChainSubcommand,
         config::ConfigSubcommand,
         keycard::KeycardSubcommand,
+        group::GroupSubcommand,
         programs::{
             amm::AmmProgramAgnosticSubcommand, ata::AtaSubcommand,
             native_token_transfer::AuthTransferSubcommand, pinata::PinataProgramAgnosticSubcommand,
@@ -28,6 +29,7 @@ pub mod account;
 pub mod chain;
 pub mod config;
 pub mod keycard;
+pub mod group;
 pub mod programs;
 
 pub(crate) trait WalletSubcommand {
@@ -60,6 +62,9 @@ pub enum Command {
     /// Associated Token Account program interaction subcommand.
     #[command(subcommand)]
     Ata(AtaSubcommand),
+    /// Group key management (create, invite, join, derive keys).
+    #[command(subcommand)]
+    Group(GroupSubcommand),
     /// Check the wallet can connect to the node and builtin local programs
     /// match the remote versions.
     CheckHealth,
@@ -172,6 +177,7 @@ pub async fn execute_subcommand(
         Command::Token(token_subcommand) => token_subcommand.handle_subcommand(wallet_core).await?,
         Command::AMM(amm_subcommand) => amm_subcommand.handle_subcommand(wallet_core).await?,
         Command::Ata(ata_subcommand) => ata_subcommand.handle_subcommand(wallet_core).await?,
+        Command::Group(group_subcommand) => group_subcommand.handle_subcommand(wallet_core).await?,
         Command::Config(config_subcommand) => {
             config_subcommand.handle_subcommand(wallet_core).await?
         }
diff --git a/wallet/src/config.rs b/wallet/src/config.rs
index 185648e4..1503c48e 100644
--- a/wallet/src/config.rs
+++ b/wallet/src/config.rs
@@ -28,7 +28,7 @@ pub struct PersistentAccountDataPublic {
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct PersistentAccountDataPrivate {
-    pub identifiers: Vec<nssa_core::Identifier>,
+    pub kinds: Vec<nssa_core::PrivateAccountKind>,
     pub chain_index: ChainIndex,
     pub data: ChildKeysPrivate,
 }
@@ -98,6 +98,21 @@ pub struct PersistentStorage {
     /// "2rnKprXqWGWJTkDZKsQbFXa4ctKRbapsdoTKQFnaVGG8").
     #[serde(default)]
     pub labels: HashMap<String, Label>,
+    /// Group key holders for shared account management.
+    #[serde(default)]
+    pub group_key_holders: std::collections::BTreeMap<
+        String,
+        key_protocol::key_management::group_key_holder::GroupKeyHolder,
+    >,
+    /// Cached state of shared private accounts (PDA and regular).
+    #[serde(default)]
+    pub shared_private_accounts: std::collections::BTreeMap<
+        nssa::AccountId,
+        key_protocol::key_protocol_core::SharedAccountEntry,
+    >,
+    /// Dedicated sealing secret key for GMS distribution.
+    #[serde(default)]
+    pub sealing_secret_key: Option<nssa_core::encryption::Scalar>,
 }
 
 impl PersistentStorage {
diff --git a/wallet/src/helperfunctions.rs b/wallet/src/helperfunctions.rs
index 2222ffe6..25116abd 100644
--- a/wallet/src/helperfunctions.rs
+++ b/wallet/src/helperfunctions.rs
@@ -200,10 +200,10 @@ pub fn produce_data_for_storage(
     }
 
     for (chain_index, node) in &user_data.private_key_tree.key_map {
-        let identifiers = node.value.1.iter().map(|(id, _)| *id).collect();
+        let kinds = node.value.1.iter().map(|(kind, _)| kind.clone()).collect();
         vec_for_storage.push(
             PersistentAccountDataPrivate {
-                identifiers,
+                kinds,
                 chain_index: chain_index.clone(),
                 data: node.clone(),
             }
@@ -222,12 +222,12 @@ pub fn produce_data_for_storage(
     }
 
     for entry in user_data.default_user_private_accounts.values() {
-        for (identifier, account) in &entry.accounts {
+        for (kind, account) in &entry.accounts {
             vec_for_storage.push(
                 InitialAccountData::Private(Box::new(PrivateAccountPrivateInitialData {
                     account: account.clone(),
                     key_chain: entry.key_chain.clone(),
-                    identifier: *identifier,
+                    identifier: kind.identifier(),
                 }))
                 .into(),
             );
@@ -238,6 +238,9 @@ pub fn produce_data_for_storage(
         accounts: vec_for_storage,
         last_synced_block,
         labels,
+        group_key_holders: user_data.group_key_holders.clone(),
+        shared_private_accounts: user_data.shared_private_accounts.clone(),
+        sealing_secret_key: user_data.sealing_secret_key,
     }
 }
 
diff --git a/wallet/src/lib.rs b/wallet/src/lib.rs
index 0de34efe..beeaf611 100644
--- a/wallet/src/lib.rs
+++ b/wallet/src/lib.rs
@@ -25,7 +25,8 @@ use nssa::{
     },
 };
 use nssa_core::{
-    Commitment, MembershipProof, SharedSecretKey, account::Nonce, program::InstructionData,
+    Commitment, MembershipProof, PrivateAccountKind, SharedSecretKey, account::Nonce,
+    program::InstructionData,
 };
 pub use privacy_preserving_tx::PrivacyPreservingAccount;
 use sequencer_service_rpc::{RpcClient as _, SequencerClient, SequencerClientBuilder};
@@ -52,6 +53,13 @@ pub enum AccDecodeData {
     Decode(nssa_core::SharedSecretKey, AccountId),
 }
 
+/// Info returned when creating a shared account.
+pub struct SharedAccountInfo {
+    pub account_id: AccountId,
+    pub npk: nssa_core::NullifierPublicKey,
+    pub vpk: nssa_core::encryption::ViewingPublicKey,
+}
+
 #[derive(Debug, thiserror::Error)]
 pub enum ExecutionFailureKind {
     #[error("Failed to get data from sequencer")]
@@ -101,6 +109,9 @@ impl WalletCore {
             accounts: persistent_accounts,
             last_synced_block,
             labels,
+            group_key_holders,
+            shared_private_accounts,
+            sealing_secret_key,
         } = PersistentStorage::from_path(&storage_path).with_context(|| {
             format!(
                 "Failed to read persistent storage at {}",
@@ -112,7 +123,13 @@ impl WalletCore {
             config_path,
             storage_path,
             config_overrides,
-            |config| WalletChainStore::new(config, persistent_accounts, labels),
+            |config| {
+                let mut store = WalletChainStore::new(config, persistent_accounts, labels)?;
+                store.user_data.group_key_holders = group_key_holders;
+                store.user_data.shared_private_accounts = shared_private_accounts;
+                store.user_data.sealing_secret_key = sealing_secret_key;
+                Ok(store)
+            },
             last_synced_block,
         )
     }
@@ -284,12 +301,178 @@ impl WalletCore {
             .value
             .0
             .nullifier_public_key;
-        let account_id = AccountId::from((&npk, identifier));
-        self.storage
-            .insert_private_account_data(account_id, identifier, Account::default());
+        let account_id = AccountId::for_regular_private_account(&npk, identifier);
+        self.storage.insert_private_account_data(
+            account_id,
+            &PrivateAccountKind::Regular(identifier),
+            Account::default(),
+        );
         (account_id, cci)
     }
 
+    /// Insert a group key holder into storage.
+    pub fn insert_group_key_holder(
+        &mut self,
+        name: String,
+        holder: key_protocol::key_management::group_key_holder::GroupKeyHolder,
+    ) {
+        self.storage.user_data.insert_group_key_holder(name, holder);
+    }
+
+    /// Set the wallet's dedicated sealing secret key.
+    pub const fn set_sealing_secret_key(&mut self, key: nssa_core::encryption::Scalar) {
+        self.storage.user_data.sealing_secret_key = Some(key);
+    }
+
+    /// Resolve an `AccountId` to the appropriate `PrivacyPreservingAccount` variant.
+    /// Checks the key tree first, then shared private accounts.
+    #[must_use]
+    pub fn resolve_private_account(
+        &self,
+        account_id: nssa::AccountId,
+    ) -> Option<PrivacyPreservingAccount> {
+        // Check key tree first
+        if self
+            .storage
+            .user_data
+            .get_private_account(account_id)
+            .is_some()
+        {
+            return Some(PrivacyPreservingAccount::PrivateOwned(account_id));
+        }
+
+        // Check shared private accounts
+        let entry = self.storage.user_data.shared_private_account(&account_id)?;
+        let holder = self
+            .storage
+            .user_data
+            .group_key_holder(&entry.group_label)?;
+
+        if let (Some(pda_seed), Some(program_id)) = (entry.pda_seed, entry.pda_program_id) {
+            let keys = holder.derive_keys_for_pda(&program_id, &pda_seed);
+            Some(PrivacyPreservingAccount::PrivatePdaShared {
+                account_id,
+                nsk: keys.nullifier_secret_key,
+                npk: keys.generate_nullifier_public_key(),
+                vpk: keys.generate_viewing_public_key(),
+                identifier: entry.identifier,
+            })
+        } else {
+            let derivation_seed = {
+                use sha2::Digest as _;
+                let mut hasher = sha2::Sha256::new();
+                hasher.update(b"/LEE/v0.3/SharedAccountTag/\x00\x00\x00\x00\x00");
+                hasher.update(entry.identifier.to_le_bytes());
+                let result: [u8; 32] = hasher.finalize().into();
+                result
+            };
+            let keys = holder.derive_keys_for_shared_account(&derivation_seed);
+            Some(PrivacyPreservingAccount::PrivateShared {
+                nsk: keys.nullifier_secret_key,
+                npk: keys.generate_nullifier_public_key(),
+                vpk: keys.generate_viewing_public_key(),
+                identifier: entry.identifier,
+            })
+        }
+    }
+
+    /// Remove a group key holder from storage. Returns the removed holder if it existed.
+    pub fn remove_group_key_holder(
+        &mut self,
+        name: &str,
+    ) -> Option<key_protocol::key_management::group_key_holder::GroupKeyHolder> {
+        self.storage.user_data.group_key_holders.remove(name)
+    }
+
+    /// Register a shared account in storage for sync tracking.
+    fn register_shared_account(
+        &mut self,
+        account_id: AccountId,
+        group_label: String,
+        identifier: nssa_core::Identifier,
+        pda_seed: Option<nssa_core::program::PdaSeed>,
+        pda_program_id: Option<nssa_core::program::ProgramId>,
+    ) {
+        use key_protocol::key_protocol_core::SharedAccountEntry;
+        self.storage.user_data.insert_shared_private_account(
+            account_id,
+            SharedAccountEntry {
+                group_label,
+                identifier,
+                pda_seed,
+                pda_program_id,
+                account: Account::default(),
+            },
+        );
+    }
+
+    /// Create a shared PDA account from a group's GMS. Returns the `AccountId` and derived keys.
+    pub fn create_shared_pda_account(
+        &mut self,
+        group_name: &str,
+        pda_seed: nssa_core::program::PdaSeed,
+        program_id: nssa_core::program::ProgramId,
+        identifier: nssa_core::Identifier,
+    ) -> Result<SharedAccountInfo> {
+        let holder = self
+            .storage
+            .user_data
+            .group_key_holder(group_name)
+            .context(format!("Group '{group_name}' not found"))?;
+
+        let keys = holder.derive_keys_for_pda(&program_id, &pda_seed);
+        let npk = keys.generate_nullifier_public_key();
+        let vpk = keys.generate_viewing_public_key();
+        let account_id = AccountId::for_private_pda(&program_id, &pda_seed, &npk, identifier);
+
+        self.register_shared_account(
+            account_id,
+            String::from(group_name),
+            identifier,
+            Some(pda_seed),
+            Some(program_id),
+        );
+
+        Ok(SharedAccountInfo {
+            account_id,
+            npk,
+            vpk,
+        })
+    }
+
+    /// Create a shared regular private account from a group's GMS. Returns the `AccountId` and
+    /// derived keys. The derivation seed is computed deterministically from a random identifier.
+    pub fn create_shared_regular_account(&mut self, group_name: &str) -> Result<SharedAccountInfo> {
+        let identifier: nssa_core::Identifier = rand::random();
+        let derivation_seed = {
+            use sha2::Digest as _;
+            let mut hasher = sha2::Sha256::new();
+            hasher.update(b"/LEE/v0.3/SharedAccountTag/\x00\x00\x00\x00\x00");
+            hasher.update(identifier.to_le_bytes());
+            let result: [u8; 32] = hasher.finalize().into();
+            result
+        };
+
+        let holder = self
+            .storage
+            .user_data
+            .group_key_holder(group_name)
+            .context(format!("Group '{group_name}' not found"))?;
+
+        let keys = holder.derive_keys_for_shared_account(&derivation_seed);
+        let npk = keys.generate_nullifier_public_key();
+        let vpk = keys.generate_viewing_public_key();
+        let account_id = AccountId::from((&npk, identifier));
+
+        self.register_shared_account(account_id, String::from(group_name), identifier, None, None);
+
+        Ok(SharedAccountInfo {
+            account_id,
+            npk,
+            vpk,
+        })
+    }
+
     /// Get account balance.
     pub async fn get_account_balance(&self, acc: AccountId) -> Result<u128> {
         Ok(self.sequencer_client.get_account_balance(acc).await?)
@@ -325,8 +508,17 @@ impl WalletCore {
 
     #[must_use]
     pub fn get_private_account_commitment(&self, account_id: AccountId) -> Option<Commitment> {
-        let (_keys, account, _identifier) =
-            self.storage.user_data.get_private_account(account_id)?;
+        let account = self
+            .storage
+            .user_data
+            .get_private_account(account_id)
+            .map(|(_keys, account, _identifier)| account)
+            .or_else(|| {
+                self.storage
+                    .user_data
+                    .shared_private_account(&account_id)
+                    .map(|entry| entry.account.clone())
+            })?;
         Some(Commitment::new(&account_id, &account))
     }
 
@@ -360,7 +552,7 @@ impl WalletCore {
                     let acc_ead = tx.message.encrypted_private_post_states[output_index].clone();
                     let acc_comm = tx.message.new_commitments[output_index].clone();
 
-                    let (identifier, res_acc) = nssa_core::EncryptionScheme::decrypt(
+                    let (kind, res_acc) = nssa_core::EncryptionScheme::decrypt(
                         &acc_ead.ciphertext,
                         secret,
                         &acc_comm,
@@ -373,7 +565,7 @@ impl WalletCore {
                     println!("Received new acc {res_acc:#?}");
 
                     self.storage
-                        .insert_private_account_data(*acc_account_id, identifier, res_acc);
+                        .insert_private_account_data(*acc_account_id, &kind, res_acc);
                 }
                 AccDecodeData::Skip => {}
             }
@@ -416,13 +608,7 @@ impl WalletCore {
         let (output, proof) = nssa::privacy_preserving_transaction::circuit::execute_and_prove(
             pre_states,
             instruction_data,
-            acc_manager.visibility_mask().to_vec(),
-            private_account_keys
-                .iter()
-                .map(|keys| (keys.npk, keys.identifier, keys.ssk))
-                .collect::<Vec<_>>(),
-            acc_manager.private_account_auth(),
-            acc_manager.private_account_membership_proofs(),
+            acc_manager.account_identities(),
             &program.to_owned(),
         )
         .unwrap();
@@ -542,24 +728,93 @@ impl WalletCore {
                                 .try_into()
                                 .expect("Ciphertext ID is expected to fit in u32"),
                         )
-                        .map(|(identifier, res_acc)| {
-                            let account_id = nssa::AccountId::from((
-                                &key_chain.nullifier_public_key,
-                                identifier,
-                            ));
-                            (account_id, identifier, res_acc)
+                        .map(|(kind, res_acc)| {
+                            let npk = &key_chain.nullifier_public_key;
+                            let account_id = nssa::AccountId::for_private_account(npk, &kind);
+                            (account_id, kind, res_acc)
                         })
                     })
                     .collect::<Vec<_>>()
             })
             .collect::<Vec<_>>();
 
-        for (affected_account_id, identifier, new_acc) in affected_accounts {
+        for (affected_account_id, kind, new_acc) in affected_accounts {
             info!(
                 "Received new account for account_id {affected_account_id:#?} with account object {new_acc:#?}"
             );
             self.storage
-                .insert_private_account_data(affected_account_id, identifier, new_acc);
+                .insert_private_account_data(affected_account_id, &kind, new_acc);
+        }
+
+        // Scan for updates to shared accounts (GMS-derived).
+        self.sync_shared_private_accounts_with_tx(&tx);
+    }
+
+    fn sync_shared_private_accounts_with_tx(&mut self, tx: &PrivacyPreservingTransaction) {
+        let shared_keys: Vec<_> = self
+            .storage
+            .user_data
+            .shared_private_accounts_iter()
+            .filter_map(|(&account_id, entry)| {
+                let holder = self
+                    .storage
+                    .user_data
+                    .group_key_holder(&entry.group_label)?;
+
+                let keys = match (&entry.pda_seed, &entry.pda_program_id) {
+                    (Some(pda_seed), Some(program_id)) => {
+                        holder.derive_keys_for_pda(program_id, pda_seed)
+                    }
+                    (Some(_), None) => return None, // PDA without program_id, skip
+                    _ => {
+                        let derivation_seed = {
+                            use sha2::Digest as _;
+                            let mut hasher = sha2::Sha256::new();
+                            hasher.update(b"/LEE/v0.3/SharedAccountTag/\x00\x00\x00\x00\x00");
+                            hasher.update(entry.identifier.to_le_bytes());
+                            let result: [u8; 32] = hasher.finalize().into();
+                            result
+                        };
+                        holder.derive_keys_for_shared_account(&derivation_seed)
+                    }
+                };
+                let npk = keys.generate_nullifier_public_key();
+                let vpk = keys.generate_viewing_public_key();
+                let vsk = keys.viewing_secret_key;
+                Some((account_id, npk, vpk, vsk))
+            })
+            .collect();
+
+        for (account_id, npk, vpk, vsk) in shared_keys {
+            let view_tag = EncryptedAccountData::compute_view_tag(&npk, &vpk);
+
+            for (ciph_id, encrypted_data) in tx
+                .message()
+                .encrypted_private_post_states
+                .iter()
+                .enumerate()
+            {
+                if encrypted_data.view_tag != view_tag {
+                    continue;
+                }
+
+                let shared_secret = SharedSecretKey::new(&vsk, &encrypted_data.epk);
+                let commitment = &tx.message.new_commitments[ciph_id];
+
+                if let Some((_kind, new_acc)) = nssa_core::EncryptionScheme::decrypt(
+                    &encrypted_data.ciphertext,
+                    &shared_secret,
+                    commitment,
+                    ciph_id
+                        .try_into()
+                        .expect("Ciphertext ID is expected to fit in u32"),
+                ) {
+                    info!("Synced shared account {account_id:#?} with new state {new_acc:#?}");
+                    self.storage
+                        .user_data
+                        .update_shared_private_account_state(&account_id, new_acc);
+                }
+            }
         }
     }
 
diff --git a/wallet/src/pinata_interactions.rs b/wallet/src/pinata_interactions.rs
deleted file mode 100644
index 77549772..00000000
--- a/wallet/src/pinata_interactions.rs
+++ /dev/null
@@ -1,165 +0,0 @@
-use common::{HashType, transaction::NSSATransaction};
-use sequencer_service_rpc::RpcClient as _;
-use key_protocol::key_management::ephemeral_key_holder::EphemeralKeyHolder;
-use nssa::{AccountId, privacy_preserving_transaction::circuit};
-use nssa_core::{MembershipProof, SharedSecretKey, account::AccountWithMetadata};
-
-use crate::{
-    ExecutionFailureKind, WalletCore, helperfunctions::produce_random_nonces,
-    transaction_utils::AccountPreparedData,
-};
-
-impl WalletCore {
-    pub async fn claim_pinata(
-        &self,
-        pinata_account_id: AccountId,
-        winner_account_id: AccountId,
-        solution: u128,
-    ) -> Result<HashType, ExecutionFailureKind> {
-        let account_ids = vec![pinata_account_id, winner_account_id];
-        let program_id = nssa::program::Program::pinata().id();
-        let message =
-            nssa::public_transaction::Message::try_new(program_id, account_ids, vec![], solution)
-                .unwrap();
-
-        let witness_set = nssa::public_transaction::WitnessSet::for_message(&message, &[]);
-        let tx = nssa::PublicTransaction::new(message, witness_set);
-
-        Ok(self.sequencer_client.send_transaction(NSSATransaction::Public(tx).into()).await?)
-    }
-
-    pub async fn claim_pinata_private_owned_account_already_initialized(
-        &self,
-        pinata_account_id: AccountId,
-        winner_account_id: AccountId,
-        solution: u128,
-        winner_proof: MembershipProof,
-    ) -> Result<(HashType, [SharedSecretKey; 1]), ExecutionFailureKind> {
-        let AccountPreparedData {
-            nsk: winner_nsk,
-            npk: winner_npk,
-            vpk: winner_vpk,
-            auth_acc: winner_pre,
-            proof: _,
-        } = self
-            .private_acc_preparation(winner_account_id, true, false)
-            .await?;
-
-        let pinata_acc = self.get_account_public(pinata_account_id).await.unwrap();
-
-        let program = nssa::program::Program::pinata();
-
-        let pinata_pre = AccountWithMetadata::new(pinata_acc.clone(), false, pinata_account_id);
-
-        let eph_holder_winner = EphemeralKeyHolder::new(&winner_npk);
-        let shared_secret_winner = eph_holder_winner.calculate_shared_secret_sender(&winner_vpk);
-
-        let (output, proof) = circuit::execute_and_prove(
-            &[pinata_pre, winner_pre],
-            &nssa::program::Program::serialize_instruction(solution).unwrap(),
-            &[0, 1],
-            &produce_random_nonces(1),
-            &[(winner_npk, shared_secret_winner.clone())],
-            &[(winner_nsk.unwrap())],
-            &[winner_proof],
-            &program.into(),
-        )
-        .unwrap();
-
-        let message =
-            nssa::privacy_preserving_transaction::message::Message::try_from_circuit_output(
-                vec![pinata_account_id],
-                vec![],
-                vec![(
-                    winner_npk,
-                    winner_vpk.clone(),
-                    eph_holder_winner.generate_ephemeral_public_key(),
-                )],
-                output,
-            )
-            .unwrap();
-
-        let witness_set =
-            nssa::privacy_preserving_transaction::witness_set::WitnessSet::for_message(
-                &message,
-                proof,
-                &[],
-            );
-        let tx = nssa::privacy_preserving_transaction::PrivacyPreservingTransaction::new(
-            message,
-            witness_set,
-        );
-
-        Ok((
-            self.sequencer_client.send_transaction(NSSATransaction::PrivacyPreserving(tx).into()).await?,
-            [shared_secret_winner],
-        ))
-    }
-
-    pub async fn claim_pinata_private_owned_account_not_initialized(
-        &self,
-        pinata_account_id: AccountId,
-        winner_account_id: AccountId,
-        solution: u128,
-    ) -> Result<(HashType, [SharedSecretKey; 1]), ExecutionFailureKind> {
-        let AccountPreparedData {
-            nsk: _,
-            npk: winner_npk,
-            vpk: winner_vpk,
-            auth_acc: winner_pre,
-            proof: _,
-        } = self
-            .private_acc_preparation(winner_account_id, false, false)
-            .await?;
-
-        let pinata_acc = self.get_account_public(pinata_account_id).await.unwrap();
-
-        let program = nssa::program::Program::pinata();
-
-        let pinata_pre = AccountWithMetadata::new(pinata_acc.clone(), false, pinata_account_id);
-
-        let eph_holder_winner = EphemeralKeyHolder::new(&winner_npk);
-        let shared_secret_winner = eph_holder_winner.calculate_shared_secret_sender(&winner_vpk);
-
-        let (output, proof) = circuit::execute_and_prove(
-            &[pinata_pre, winner_pre],
-            &nssa::program::Program::serialize_instruction(solution).unwrap(),
-            &[0, 2],
-            &produce_random_nonces(1),
-            &[(winner_npk, shared_secret_winner.clone())],
-            &[],
-            &[],
-            &program.into(),
-        )
-        .unwrap();
-
-        let message =
-            nssa::privacy_preserving_transaction::message::Message::try_from_circuit_output(
-                vec![pinata_account_id],
-                vec![],
-                vec![(
-                    winner_npk,
-                    winner_vpk.clone(),
-                    eph_holder_winner.generate_ephemeral_public_key(),
-                )],
-                output,
-            )
-            .unwrap();
-
-        let witness_set =
-            nssa::privacy_preserving_transaction::witness_set::WitnessSet::for_message(
-                &message,
-                proof,
-                &[],
-            );
-        let tx = nssa::privacy_preserving_transaction::PrivacyPreservingTransaction::new(
-            message,
-            witness_set,
-        );
-
-        Ok((
-            self.sequencer_client.send_transaction(NSSATransaction::PrivacyPreserving(tx).into()).await?,
-            [shared_secret_winner],
-        ))
-    }
-}
diff --git a/wallet/src/privacy_preserving_tx.rs b/wallet/src/privacy_preserving_tx.rs
index 3df2ecc1..6d118c0c 100644
--- a/wallet/src/privacy_preserving_tx.rs
+++ b/wallet/src/privacy_preserving_tx.rs
@@ -2,7 +2,8 @@ use anyhow::Result;
 use key_protocol::key_management::ephemeral_key_holder::EphemeralKeyHolder;
 use nssa::{AccountId, PrivateKey};
 use nssa_core::{
-    Identifier, MembershipProof, NullifierPublicKey, NullifierSecretKey, SharedSecretKey,
+    Identifier, InputAccountIdentity, MembershipProof, NullifierPublicKey, NullifierSecretKey,
+    SharedSecretKey,
     account::{AccountWithMetadata, Nonce},
     encryption::{EphemeralPublicKey, ViewingPublicKey},
 };
@@ -18,6 +19,35 @@ pub enum PrivacyPreservingAccount {
         vpk: ViewingPublicKey,
         identifier: Identifier,
     },
+    /// An owned private PDA: wallet holds the nsk/npk; `account_id` was derived via
+    /// [`AccountId::for_private_pda`].
+    PrivatePdaOwned(AccountId),
+    /// A foreign private PDA: wallet knows the recipient's npk/vpk but not their nsk.
+    /// Uses a default (uninitialised) account.
+    PrivatePdaForeign {
+        account_id: AccountId,
+        npk: NullifierPublicKey,
+        vpk: ViewingPublicKey,
+        identifier: Identifier,
+    },
+    /// A shared regular private account with externally-provided keys (e.g. from GMS).
+    /// Uses standard `AccountId = from((&npk, identifier))` with authorized/unauthorized private
+    /// paths. Works with `authenticated_transfer` and all existing programs out of the box.
+    PrivateShared {
+        nsk: NullifierSecretKey,
+        npk: NullifierPublicKey,
+        vpk: ViewingPublicKey,
+        identifier: Identifier,
+    },
+    /// A shared private PDA with externally-provided keys (e.g. from GMS).
+    /// `account_id` was derived via [`AccountId::for_private_pda`].
+    PrivatePdaShared {
+        account_id: AccountId,
+        nsk: NullifierSecretKey,
+        npk: NullifierPublicKey,
+        vpk: ViewingPublicKey,
+        identifier: Identifier,
+    },
 }
 
 impl PrivacyPreservingAccount {
@@ -31,18 +61,17 @@ impl PrivacyPreservingAccount {
         matches!(
             &self,
             Self::PrivateOwned(_)
-                | Self::PrivateForeign {
-                    npk: _,
-                    vpk: _,
-                    identifier: _
-                }
+                | Self::PrivateForeign { .. }
+                | Self::PrivatePdaOwned(_)
+                | Self::PrivatePdaForeign { .. }
+                | Self::PrivateShared { .. }
+                | Self::PrivatePdaShared { .. }
         )
     }
 }
 
 pub struct PrivateAccountKeys {
     pub npk: NullifierPublicKey,
-    pub identifier: Identifier,
     pub ssk: SharedSecretKey,
     pub vpk: ViewingPublicKey,
     pub epk: EphemeralPublicKey,
@@ -58,7 +87,6 @@ enum State {
 
 pub struct AccountManager {
     states: Vec<State>,
-    visibility_mask: Vec<u8>,
 }
 
 impl AccountManager {
@@ -66,11 +94,10 @@ impl AccountManager {
         wallet: &WalletCore,
         accounts: Vec<PrivacyPreservingAccount>,
     ) -> Result<Self, ExecutionFailureKind> {
-        let mut pre_states = Vec::with_capacity(accounts.len());
-        let mut visibility_mask = Vec::with_capacity(accounts.len());
+        let mut states = Vec::with_capacity(accounts.len());
 
         for account in accounts {
-            let (state, mask) = match account {
+            let state = match account {
                 PrivacyPreservingAccount::Public(account_id) => {
                     let acc = wallet
                         .get_account_public(account_id)
@@ -80,13 +107,12 @@ impl AccountManager {
                     let sk = wallet.get_account_public_signing_key(account_id).cloned();
                     let account = AccountWithMetadata::new(acc.clone(), sk.is_some(), account_id);
 
-                    (State::Public { account, sk }, 0)
+                    State::Public { account, sk }
                 }
                 PrivacyPreservingAccount::PrivateOwned(account_id) => {
-                    let pre = private_acc_preparation(wallet, account_id).await?;
-                    let mask = if pre.pre_state.is_authorized { 1 } else { 2 };
+                    let pre = private_key_tree_acc_preparation(wallet, account_id, false).await?;
 
-                    (State::Private(pre), mask)
+                    State::Private(pre)
                 }
                 PrivacyPreservingAccount::PrivateForeign {
                     npk,
@@ -95,6 +121,9 @@ impl AccountManager {
                 } => {
                     let acc = nssa_core::account::Account::default();
                     let auth_acc = AccountWithMetadata::new(acc, false, (&npk, identifier));
+                    let eph_holder = EphemeralKeyHolder::new(&npk);
+                    let ssk = eph_holder.calculate_shared_secret_sender(&vpk);
+                    let epk = eph_holder.generate_ephemeral_public_key();
                     let pre = AccountPreparedData {
                         nsk: None,
                         npk,
@@ -102,20 +131,75 @@ impl AccountManager {
                         vpk,
                         pre_state: auth_acc,
                         proof: None,
+                        ssk,
+                        epk,
+                        is_pda: false,
                     };
 
-                    (State::Private(pre), 2)
+                    State::Private(pre)
+                }
+                PrivacyPreservingAccount::PrivatePdaOwned(account_id) => {
+                    let pre = private_key_tree_acc_preparation(wallet, account_id, true).await?;
+                    State::Private(pre)
+                }
+                PrivacyPreservingAccount::PrivatePdaForeign {
+                    account_id,
+                    npk,
+                    vpk,
+                    identifier,
+                } => {
+                    let acc = nssa_core::account::Account::default();
+                    let auth_acc = AccountWithMetadata::new(acc, false, account_id);
+                    let eph_holder = EphemeralKeyHolder::new(&npk);
+                    let ssk = eph_holder.calculate_shared_secret_sender(&vpk);
+                    let epk = eph_holder.generate_ephemeral_public_key();
+                    let pre = AccountPreparedData {
+                        nsk: None,
+                        npk,
+                        identifier,
+                        vpk,
+                        pre_state: auth_acc,
+                        proof: None,
+                        ssk,
+                        epk,
+                        is_pda: true,
+                    };
+                    State::Private(pre)
+                }
+                PrivacyPreservingAccount::PrivateShared {
+                    nsk,
+                    npk,
+                    vpk,
+                    identifier,
+                } => {
+                    let account_id = nssa::AccountId::from((&npk, identifier));
+                    let pre = private_shared_acc_preparation(
+                        wallet, account_id, nsk, npk, vpk, identifier, false,
+                    )
+                    .await?;
+
+                    State::Private(pre)
+                }
+                PrivacyPreservingAccount::PrivatePdaShared {
+                    account_id,
+                    nsk,
+                    npk,
+                    vpk,
+                    identifier,
+                } => {
+                    let pre = private_shared_acc_preparation(
+                        wallet, account_id, nsk, npk, vpk, identifier, true,
+                    )
+                    .await?;
+
+                    State::Private(pre)
                 }
             };
 
-            pre_states.push(state);
-            visibility_mask.push(mask);
+            states.push(state);
         }
 
-        Ok(Self {
-            states: pre_states,
-            visibility_mask,
-        })
+        Ok(Self { states })
     }
 
     pub fn pre_states(&self) -> Vec<AccountWithMetadata> {
@@ -128,10 +212,6 @@ impl AccountManager {
             .collect()
     }
 
-    pub fn visibility_mask(&self) -> &[u8] {
-        &self.visibility_mask
-    }
-
     pub fn public_account_nonces(&self) -> Vec<Nonce> {
         self.states
             .iter()
@@ -146,38 +226,59 @@ impl AccountManager {
         self.states
             .iter()
             .filter_map(|state| match state {
-                State::Private(pre) => {
-                    let eph_holder = EphemeralKeyHolder::new(&pre.npk);
+                State::Private(pre) => Some(PrivateAccountKeys {
+                    npk: pre.npk,
+                    ssk: pre.ssk,
+                    vpk: pre.vpk.clone(),
+                    epk: pre.epk.clone(),
+                }),
+                State::Public { .. } => None,
+            })
+            .collect()
+    }
 
-                    Some(PrivateAccountKeys {
-                        npk: pre.npk,
+    /// Build the per-account input vec for the privacy-preserving circuit. Each variant carries
+    /// exactly the fields the circuit's code path for that account needs, with the ephemeral
+    /// keys (`ssk`) drawn from the cached values that `private_account_keys` and the message
+    /// construction also use, so all three views agree on the same ephemeral key.
+    pub fn account_identities(&self) -> Vec<InputAccountIdentity> {
+        self.states
+            .iter()
+            .map(|state| match state {
+                State::Public { .. } => InputAccountIdentity::Public,
+                State::Private(pre) if pre.is_pda => match (pre.nsk, pre.proof.clone()) {
+                    (Some(nsk), Some(membership_proof)) => InputAccountIdentity::PrivatePdaUpdate {
+                        ssk: pre.ssk,
+                        nsk,
+                        membership_proof,
                         identifier: pre.identifier,
-                        ssk: eph_holder.calculate_shared_secret_sender(&pre.vpk),
-                        vpk: pre.vpk.clone(),
-                        epk: eph_holder.generate_ephemeral_public_key(),
-                    })
-                }
-                State::Public { .. } => None,
-            })
-            .collect()
-    }
-
-    pub fn private_account_auth(&self) -> Vec<NullifierSecretKey> {
-        self.states
-            .iter()
-            .filter_map(|state| match state {
-                State::Private(pre) => pre.nsk,
-                State::Public { .. } => None,
-            })
-            .collect()
-    }
-
-    pub fn private_account_membership_proofs(&self) -> Vec<Option<MembershipProof>> {
-        self.states
-            .iter()
-            .filter_map(|state| match state {
-                State::Private(pre) => Some(pre.proof.clone()),
-                State::Public { .. } => None,
+                    },
+                    _ => InputAccountIdentity::PrivatePdaInit {
+                        npk: pre.npk,
+                        ssk: pre.ssk,
+                        identifier: pre.identifier,
+                    },
+                },
+                State::Private(pre) => match (pre.nsk, pre.proof.clone()) {
+                    (Some(nsk), Some(membership_proof)) => {
+                        InputAccountIdentity::PrivateAuthorizedUpdate {
+                            ssk: pre.ssk,
+                            nsk,
+                            membership_proof,
+                            identifier: pre.identifier,
+                        }
+                    }
+                    (Some(nsk), None) => InputAccountIdentity::PrivateAuthorizedInit {
+                        ssk: pre.ssk,
+                        nsk,
+                        identifier: pre.identifier,
+                    },
+                    (None, _) => InputAccountIdentity::PrivateUnauthorized {
+                        npk: pre.npk,
+                        ssk: pre.ssk,
+                        identifier: pre.identifier,
+                    },
+                },
             })
             .collect()
     }
@@ -210,20 +311,30 @@ struct AccountPreparedData {
     vpk: ViewingPublicKey,
     pre_state: AccountWithMetadata,
     proof: Option<MembershipProof>,
+    /// Cached shared-secret key derived once at `AccountManager::new`. Reused for both the
+    /// circuit input variant (`account_identities()`) and the message ephemeral-key tuples
+    /// (`private_account_keys()`), so all consumers see the same key. The corresponding
+    /// `EphemeralKeyHolder` uses `OsRng` and would produce a different value on a second call.
+    ssk: SharedSecretKey,
+    /// Cached ephemeral public key, paired with `ssk`.
+    epk: EphemeralPublicKey,
+    /// True when this account is a private PDA (owned or foreign). Used by `account_identities()`
+    /// to select `PrivatePdaInit`/`PrivatePdaUpdate` rather than the standalone private variants.
+    is_pda: bool,
 }
 
-async fn private_acc_preparation(
+async fn private_key_tree_acc_preparation(
     wallet: &WalletCore,
     account_id: AccountId,
+    is_pda: bool,
 ) -> Result<AccountPreparedData, ExecutionFailureKind> {
-    let Some((from_keys, from_acc, from_identifier)) =
-        wallet.storage.user_data.get_private_account(account_id)
-    else {
-        return Err(ExecutionFailureKind::KeyNotFoundError);
-    };
+    let (from_keys, from_acc, from_identifier) = wallet
+        .storage
+        .user_data
+        .get_private_account(account_id)
+        .ok_or(ExecutionFailureKind::KeyNotFoundError)?;
 
     let nsk = from_keys.private_key_holder.nullifier_secret_key;
-
     let from_npk = from_keys.nullifier_public_key;
     let from_vpk = from_keys.viewing_public_key;
 
@@ -235,7 +346,11 @@ async fn private_acc_preparation(
 
     // TODO: Technically we could allow unauthorized owned accounts, but currently we don't have
     // support from that in the wallet.
-    let sender_pre = AccountWithMetadata::new(from_acc.clone(), true, (&from_npk, from_identifier));
+    let sender_pre = AccountWithMetadata::new(from_acc.clone(), true, account_id);
+
+    let eph_holder = EphemeralKeyHolder::new(&from_npk);
+    let ssk = eph_holder.calculate_shared_secret_sender(&from_vpk);
+    let epk = eph_holder.generate_ephemeral_public_key();
 
     Ok(AccountPreparedData {
         nsk: Some(nsk),
@@ -244,5 +359,64 @@ async fn private_acc_preparation(
         vpk: from_vpk,
         pre_state: sender_pre,
         proof,
+        ssk,
+        epk,
+        is_pda,
     })
 }
+
+async fn private_shared_acc_preparation(
+    wallet: &WalletCore,
+    account_id: AccountId,
+    nsk: NullifierSecretKey,
+    npk: NullifierPublicKey,
+    vpk: ViewingPublicKey,
+    identifier: Identifier,
+    is_pda: bool,
+) -> Result<AccountPreparedData, ExecutionFailureKind> {
+    let acc = wallet
+        .storage
+        .user_data
+        .shared_private_account(&account_id)
+        .map(|e| e.account.clone())
+        .unwrap_or_default();
+
+    let pre_state = AccountWithMetadata::new(acc, true, account_id);
+
+    let proof = wallet
+        .check_private_account_initialized(account_id)
+        .await
+        .unwrap_or(None);
+
+    let eph_holder = EphemeralKeyHolder::new(&npk);
+    let ssk = eph_holder.calculate_shared_secret_sender(&vpk);
+    let epk = eph_holder.generate_ephemeral_public_key();
+    Ok(AccountPreparedData {
+        nsk: Some(nsk),
+        npk,
+        identifier,
+        vpk,
+        pre_state,
+        proof,
+        ssk,
+        epk,
+        is_pda,
+    })
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn private_shared_is_private() {
+        let acc = PrivacyPreservingAccount::PrivateShared {
+            nsk: [0; 32],
+            npk: NullifierPublicKey([1; 32]),
+            vpk: ViewingPublicKey::from_scalar([2; 32]),
+            identifier: 42,
+        };
+        assert!(acc.is_private());
+        assert!(!acc.is_public());
+    }
+}
diff --git a/wallet/src/program_facades/ata.rs b/wallet/src/program_facades/ata.rs
index ac60fb63..fa868750 100644
--- a/wallet/src/program_facades/ata.rs
+++ b/wallet/src/program_facades/ata.rs
@@ -188,7 +188,9 @@ impl Ata<'_> {
             Program::serialize_instruction(instruction).expect("Instruction should serialize");
 
         let accounts = vec![
-            PrivacyPreservingAccount::PrivateOwned(owner_id),
+            self.0
+                .resolve_private_account(owner_id)
+                .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
             PrivacyPreservingAccount::Public(definition_id),
             PrivacyPreservingAccount::Public(ata_id),
         ];
@@ -223,7 +225,9 @@ impl Ata<'_> {
             Program::serialize_instruction(instruction).expect("Instruction should serialize");
 
         let accounts = vec![
-            PrivacyPreservingAccount::PrivateOwned(owner_id),
+            self.0
+                .resolve_private_account(owner_id)
+                .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
             PrivacyPreservingAccount::Public(sender_ata_id),
             PrivacyPreservingAccount::Public(recipient_id),
         ];
@@ -257,7 +261,9 @@ impl Ata<'_> {
             Program::serialize_instruction(instruction).expect("Instruction should serialize");
 
         let accounts = vec![
-            PrivacyPreservingAccount::PrivateOwned(owner_id),
+            self.0
+                .resolve_private_account(owner_id)
+                .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
             PrivacyPreservingAccount::Public(holder_ata_id),
             PrivacyPreservingAccount::Public(definition_id),
         ];
diff --git a/wallet/src/program_facades/native_token_transfer/deshielded.rs b/wallet/src/program_facades/native_token_transfer/deshielded.rs
index d51f15ce..d4bde39f 100644
--- a/wallet/src/program_facades/native_token_transfer/deshielded.rs
+++ b/wallet/src/program_facades/native_token_transfer/deshielded.rs
@@ -16,7 +16,9 @@ impl NativeTokenTransfer<'_> {
         self.0
             .send_privacy_preserving_tx_with_pre_check(
                 vec![
-                    PrivacyPreservingAccount::PrivateOwned(from),
+                    self.0
+                        .resolve_private_account(from)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
                     PrivacyPreservingAccount::Public(to),
                 ],
                 instruction_data,
diff --git a/wallet/src/program_facades/native_token_transfer/private.rs b/wallet/src/program_facades/native_token_transfer/private.rs
index d317b31c..501ead50 100644
--- a/wallet/src/program_facades/native_token_transfer/private.rs
+++ b/wallet/src/program_facades/native_token_transfer/private.rs
@@ -14,9 +14,14 @@ impl NativeTokenTransfer<'_> {
     ) -> Result<(HashType, SharedSecretKey), ExecutionFailureKind> {
         let instruction: u128 = 0;
 
+        let account = self
+            .0
+            .resolve_private_account(from)
+            .ok_or(ExecutionFailureKind::KeyNotFoundError)?;
+
         self.0
             .send_privacy_preserving_tx(
-                vec![PrivacyPreservingAccount::PrivateOwned(from)],
+                vec![account],
                 Program::serialize_instruction(instruction).unwrap(),
                 &Program::authenticated_transfer_program().into(),
             )
@@ -41,7 +46,9 @@ impl NativeTokenTransfer<'_> {
         self.0
             .send_privacy_preserving_tx_with_pre_check(
                 vec![
-                    PrivacyPreservingAccount::PrivateOwned(from),
+                    self.0
+                        .resolve_private_account(from)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
                     PrivacyPreservingAccount::PrivateForeign {
                         npk: to_npk,
                         vpk: to_vpk,
@@ -69,12 +76,18 @@ impl NativeTokenTransfer<'_> {
     ) -> Result<(HashType, [SharedSecretKey; 2]), ExecutionFailureKind> {
         let (instruction_data, program, tx_pre_check) = auth_transfer_preparation(balance_to_move);
 
+        let from_account = self
+            .0
+            .resolve_private_account(from)
+            .ok_or(ExecutionFailureKind::KeyNotFoundError)?;
+        let to_account = self
+            .0
+            .resolve_private_account(to)
+            .ok_or(ExecutionFailureKind::KeyNotFoundError)?;
+
         self.0
             .send_privacy_preserving_tx_with_pre_check(
-                vec![
-                    PrivacyPreservingAccount::PrivateOwned(from),
-                    PrivacyPreservingAccount::PrivateOwned(to),
-                ],
+                vec![from_account, to_account],
                 instruction_data,
                 &program.into(),
                 tx_pre_check,
diff --git a/wallet/src/program_facades/native_token_transfer/shielded.rs b/wallet/src/program_facades/native_token_transfer/shielded.rs
index 8f7ba2b5..98dd0081 100644
--- a/wallet/src/program_facades/native_token_transfer/shielded.rs
+++ b/wallet/src/program_facades/native_token_transfer/shielded.rs
@@ -18,7 +18,9 @@ impl NativeTokenTransfer<'_> {
             .send_privacy_preserving_tx_with_pre_check(
                 vec![
                     PrivacyPreservingAccount::Public(from),
-                    PrivacyPreservingAccount::PrivateOwned(to),
+                    self.0
+                        .resolve_private_account(to)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
                 ],
                 instruction_data,
                 &program.into(),
diff --git a/wallet/src/program_facades/pinata.rs b/wallet/src/program_facades/pinata.rs
index 97118ecd..0575455e 100644
--- a/wallet/src/program_facades/pinata.rs
+++ b/wallet/src/program_facades/pinata.rs
@@ -56,7 +56,9 @@ impl Pinata<'_> {
             .send_privacy_preserving_tx(
                 vec![
                     PrivacyPreservingAccount::Public(pinata_account_id),
-                    PrivacyPreservingAccount::PrivateOwned(winner_account_id),
+                    self.0
+                        .resolve_private_account(winner_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
                 ],
                 nssa::program::Program::serialize_instruction(solution).unwrap(),
                 &nssa::program::Program::pinata().into(),
diff --git a/wallet/src/program_facades/token.rs b/wallet/src/program_facades/token.rs
index d105a4de..da069bc2 100644
--- a/wallet/src/program_facades/token.rs
+++ b/wallet/src/program_facades/token.rs
@@ -74,7 +74,9 @@ impl Token<'_> {
             .send_privacy_preserving_tx(
                 vec![
                     PrivacyPreservingAccount::Public(definition_account_id),
-                    PrivacyPreservingAccount::PrivateOwned(supply_account_id),
+                    self.0
+                        .resolve_private_account(supply_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
                 ],
                 instruction_data,
                 &Program::token().into(),
@@ -103,7 +105,9 @@ impl Token<'_> {
         self.0
             .send_privacy_preserving_tx(
                 vec![
-                    PrivacyPreservingAccount::PrivateOwned(definition_account_id),
+                    self.0
+                        .resolve_private_account(definition_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
                     PrivacyPreservingAccount::Public(supply_account_id),
                 ],
                 instruction_data,
@@ -133,8 +137,12 @@ impl Token<'_> {
         self.0
             .send_privacy_preserving_tx(
                 vec![
-                    PrivacyPreservingAccount::PrivateOwned(definition_account_id),
-                    PrivacyPreservingAccount::PrivateOwned(supply_account_id),
+                    self.0
+                        .resolve_private_account(definition_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
+                    self.0
+                        .resolve_private_account(supply_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
                 ],
                 instruction_data,
                 &Program::token().into(),
@@ -227,8 +235,12 @@ impl Token<'_> {
         self.0
             .send_privacy_preserving_tx(
                 vec![
-                    PrivacyPreservingAccount::PrivateOwned(sender_account_id),
-                    PrivacyPreservingAccount::PrivateOwned(recipient_account_id),
+                    self.0
+                        .resolve_private_account(sender_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
+                    self.0
+                        .resolve_private_account(recipient_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
                 ],
                 instruction_data,
                 &Program::token().into(),
@@ -259,7 +271,9 @@ impl Token<'_> {
         self.0
             .send_privacy_preserving_tx(
                 vec![
-                    PrivacyPreservingAccount::PrivateOwned(sender_account_id),
+                    self.0
+                        .resolve_private_account(sender_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
                     PrivacyPreservingAccount::PrivateForeign {
                         npk: recipient_npk,
                         vpk: recipient_vpk,
@@ -293,7 +307,9 @@ impl Token<'_> {
         self.0
             .send_privacy_preserving_tx(
                 vec![
-                    PrivacyPreservingAccount::PrivateOwned(sender_account_id),
+                    self.0
+                        .resolve_private_account(sender_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
                     PrivacyPreservingAccount::Public(recipient_account_id),
                 ],
                 instruction_data,
@@ -325,7 +341,9 @@ impl Token<'_> {
             .send_privacy_preserving_tx(
                 vec![
                     PrivacyPreservingAccount::Public(sender_account_id),
-                    PrivacyPreservingAccount::PrivateOwned(recipient_account_id),
+                    self.0
+                        .resolve_private_account(recipient_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
                 ],
                 instruction_data,
                 &Program::token().into(),
@@ -434,8 +452,12 @@ impl Token<'_> {
         self.0
             .send_privacy_preserving_tx(
                 vec![
-                    PrivacyPreservingAccount::PrivateOwned(definition_account_id),
-                    PrivacyPreservingAccount::PrivateOwned(holder_account_id),
+                    self.0
+                        .resolve_private_account(definition_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
+                    self.0
+                        .resolve_private_account(holder_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
                 ],
                 instruction_data,
                 &Program::token().into(),
@@ -464,7 +486,9 @@ impl Token<'_> {
         self.0
             .send_privacy_preserving_tx(
                 vec![
-                    PrivacyPreservingAccount::PrivateOwned(definition_account_id),
+                    self.0
+                        .resolve_private_account(definition_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
                     PrivacyPreservingAccount::Public(holder_account_id),
                 ],
                 instruction_data,
@@ -496,7 +520,9 @@ impl Token<'_> {
             .send_privacy_preserving_tx(
                 vec![
                     PrivacyPreservingAccount::Public(definition_account_id),
-                    PrivacyPreservingAccount::PrivateOwned(holder_account_id),
+                    self.0
+                        .resolve_private_account(holder_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
                 ],
                 instruction_data,
                 &Program::token().into(),
@@ -590,8 +616,12 @@ impl Token<'_> {
         self.0
             .send_privacy_preserving_tx(
                 vec![
-                    PrivacyPreservingAccount::PrivateOwned(definition_account_id),
-                    PrivacyPreservingAccount::PrivateOwned(holder_account_id),
+                    self.0
+                        .resolve_private_account(definition_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
+                    self.0
+                        .resolve_private_account(holder_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
                 ],
                 instruction_data,
                 &Program::token().into(),
@@ -622,7 +652,9 @@ impl Token<'_> {
         self.0
             .send_privacy_preserving_tx(
                 vec![
-                    PrivacyPreservingAccount::PrivateOwned(definition_account_id),
+                    self.0
+                        .resolve_private_account(definition_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
                     PrivacyPreservingAccount::PrivateForeign {
                         npk: holder_npk,
                         vpk: holder_vpk,
@@ -656,7 +688,9 @@ impl Token<'_> {
         self.0
             .send_privacy_preserving_tx(
                 vec![
-                    PrivacyPreservingAccount::PrivateOwned(definition_account_id),
+                    self.0
+                        .resolve_private_account(definition_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
                     PrivacyPreservingAccount::Public(holder_account_id),
                 ],
                 instruction_data,
@@ -688,7 +722,9 @@ impl Token<'_> {
             .send_privacy_preserving_tx(
                 vec![
                     PrivacyPreservingAccount::Public(definition_account_id),
-                    PrivacyPreservingAccount::PrivateOwned(holder_account_id),
+                    self.0
+                        .resolve_private_account(holder_account_id)
+                        .ok_or(ExecutionFailureKind::KeyNotFoundError)?,
                 ],
                 instruction_data,
                 &Program::token().into(),
diff --git a/wallet/src/transaction_utils.rs b/wallet/src/transaction_utils.rs
deleted file mode 100644
index f2def802..00000000
--- a/wallet/src/transaction_utils.rs
+++ /dev/null
@@ -1,594 +0,0 @@
-use common::{HashType, transaction::NSSATransaction};
-use sequencer_service_rpc::RpcClient as _;
-use key_protocol::key_management::ephemeral_key_holder::EphemeralKeyHolder;
-use nssa::{
-    Account, AccountId, PrivacyPreservingTransaction,
-    privacy_preserving_transaction::{circuit, message::Message, witness_set::WitnessSet},
-    program::Program,
-};
-use nssa_core::{
-    Commitment, MembershipProof, NullifierPublicKey, NullifierSecretKey, SharedSecretKey,
-    account::AccountWithMetadata, encryption::ViewingPublicKey, program::InstructionData,
-};
-
-use crate::{ExecutionFailureKind, WalletCore, helperfunctions::produce_random_nonces};
-
-pub(crate) struct AccountPreparedData {
-    pub nsk: Option<NullifierSecretKey>,
-    pub npk: NullifierPublicKey,
-    pub vpk: ViewingPublicKey,
-    pub auth_acc: AccountWithMetadata,
-    pub proof: Option<MembershipProof>,
-}
-
-impl WalletCore {
-    pub(crate) async fn private_acc_preparation(
-        &self,
-        account_id: AccountId,
-        is_authorized: bool,
-        needs_proof: bool,
-    ) -> Result<AccountPreparedData, ExecutionFailureKind> {
-        let Some((from_keys, from_acc)) = self
-            .storage
-            .user_data
-            .get_private_account(&account_id)
-            .cloned()
-        else {
-            return Err(ExecutionFailureKind::KeyNotFoundError);
-        };
-
-        let mut nsk = None;
-        let mut proof = None;
-
-        let from_npk = from_keys.nullifier_public_key;
-        let from_vpk = from_keys.viewing_public_key;
-
-        let sender_commitment = Commitment::new(&from_npk, &from_acc);
-
-        let sender_pre = AccountWithMetadata::new(from_acc.clone(), is_authorized, &from_npk);
-
-        if is_authorized {
-            nsk = Some(from_keys.private_key_holder.nullifier_secret_key);
-        }
-
-        if needs_proof {
-            proof = Some(
-                self.sequencer_client
-                    .get_proof_for_commitment(sender_commitment)
-                    .await
-                    .unwrap(),
-            );
-        }
-
-        Ok(AccountPreparedData {
-            nsk,
-            npk: from_npk,
-            vpk: from_vpk,
-            auth_acc: sender_pre,
-            proof,
-        })
-    }
-
-    pub(crate) async fn private_tx_two_accs_all_init(
-        &self,
-        from: AccountId,
-        to: AccountId,
-        instruction_data: InstructionData,
-        tx_pre_check: impl FnOnce(&Account, &Account) -> Result<(), ExecutionFailureKind>,
-        program: Program,
-        to_proof: MembershipProof,
-    ) -> Result<(HashType, [SharedSecretKey; 2]), ExecutionFailureKind> {
-        let AccountPreparedData {
-            nsk: from_nsk,
-            npk: from_npk,
-            vpk: from_vpk,
-            auth_acc: sender_pre,
-            proof: from_proof,
-        } = self.private_acc_preparation(from, true, true).await?;
-
-        let AccountPreparedData {
-            nsk: to_nsk,
-            npk: to_npk,
-            vpk: to_vpk,
-            auth_acc: recipient_pre,
-            proof: _,
-        } = self.private_acc_preparation(to, true, false).await?;
-
-        tx_pre_check(&sender_pre.account, &recipient_pre.account)?;
-
-        let eph_holder_from = EphemeralKeyHolder::new(&from_npk);
-        let shared_secret_from = eph_holder_from.calculate_shared_secret_sender(&from_vpk);
-
-        let eph_holder_to = EphemeralKeyHolder::new(&to_npk);
-        let shared_secret_to = eph_holder_to.calculate_shared_secret_sender(&to_vpk);
-
-        let (output, proof) = circuit::execute_and_prove(
-            &[sender_pre, recipient_pre],
-            &instruction_data,
-            &[1, 1],
-            &produce_random_nonces(2),
-            &[
-                (from_npk, shared_secret_from.clone()),
-                (to_npk, shared_secret_to.clone()),
-            ],
-            &[
-                (from_nsk.unwrap(), from_proof.unwrap()),
-                (to_nsk.unwrap(), to_proof),
-            ],
-            &program.into(),
-        )
-        .unwrap();
-
-        let message = Message::try_from_circuit_output(
-            vec![],
-            vec![],
-            vec![
-                (
-                    from_npk,
-                    from_vpk.clone(),
-                    eph_holder_from.generate_ephemeral_public_key(),
-                ),
-                (
-                    to_npk,
-                    to_vpk.clone(),
-                    eph_holder_to.generate_ephemeral_public_key(),
-                ),
-            ],
-            output,
-        )
-        .unwrap();
-
-        let witness_set = WitnessSet::for_message(&message, proof, &[]);
-        let tx = PrivacyPreservingTransaction::new(message, witness_set);
-
-        Ok((
-            self.sequencer_client.send_transaction(NSSATransaction::PrivacyPreserving(tx).into()).await?,
-            [shared_secret_from, shared_secret_to],
-        ))
-    }
-
-    pub(crate) async fn private_tx_two_accs_receiver_uninit(
-        &self,
-        from: AccountId,
-        to: AccountId,
-        instruction_data: InstructionData,
-        tx_pre_check: impl FnOnce(&Account, &Account) -> Result<(), ExecutionFailureKind>,
-        program: Program,
-    ) -> Result<(HashType, [SharedSecretKey; 2]), ExecutionFailureKind> {
-        let AccountPreparedData {
-            nsk: from_nsk,
-            npk: from_npk,
-            vpk: from_vpk,
-            auth_acc: sender_pre,
-            proof: from_proof,
-        } = self.private_acc_preparation(from, true, true).await?;
-
-        let AccountPreparedData {
-            nsk: _,
-            npk: to_npk,
-            vpk: to_vpk,
-            auth_acc: recipient_pre,
-            proof: _,
-        } = self.private_acc_preparation(to, false, false).await?;
-
-        tx_pre_check(&sender_pre.account, &recipient_pre.account)?;
-
-        let eph_holder_from = EphemeralKeyHolder::new(&from_npk);
-        let shared_secret_from = eph_holder_from.calculate_shared_secret_sender(&from_vpk);
-
-        let eph_holder_to = EphemeralKeyHolder::new(&to_npk);
-        let shared_secret_to = eph_holder_to.calculate_shared_secret_sender(&to_vpk);
-
-        let (output, proof) = circuit::execute_and_prove(
-            &[sender_pre, recipient_pre],
-            &instruction_data,
-            &[1, 2],
-            &produce_random_nonces(2),
-            &[
-                (from_npk, shared_secret_from.clone()),
-                (to_npk, shared_secret_to.clone()),
-            ],
-            &[(from_nsk.unwrap(), from_proof.unwrap())],
-            &program.into(),
-        )
-        .unwrap();
-
-        let message = Message::try_from_circuit_output(
-            vec![],
-            vec![],
-            vec![
-                (
-                    from_npk,
-                    from_vpk.clone(),
-                    eph_holder_from.generate_ephemeral_public_key(),
-                ),
-                (
-                    to_npk,
-                    to_vpk.clone(),
-                    eph_holder_to.generate_ephemeral_public_key(),
-                ),
-            ],
-            output,
-        )
-        .unwrap();
-
-        let witness_set = WitnessSet::for_message(&message, proof, &[]);
-        let tx = PrivacyPreservingTransaction::new(message, witness_set);
-
-        Ok((
-            self.sequencer_client.send_transaction(NSSATransaction::PrivacyPreserving(tx).into()).await?,
-            [shared_secret_from, shared_secret_to],
-        ))
-    }
-
-    pub(crate) async fn private_tx_two_accs_receiver_outer(
-        &self,
-        from: AccountId,
-        to_npk: NullifierPublicKey,
-        to_vpk: ViewingPublicKey,
-        instruction_data: InstructionData,
-        tx_pre_check: impl FnOnce(&Account, &Account) -> Result<(), ExecutionFailureKind>,
-        program: Program,
-    ) -> Result<(HashType, [SharedSecretKey; 2]), ExecutionFailureKind> {
-        let AccountPreparedData {
-            nsk: from_nsk,
-            npk: from_npk,
-            vpk: from_vpk,
-            auth_acc: sender_pre,
-            proof: from_proof,
-        } = self.private_acc_preparation(from, true, true).await?;
-
-        let to_acc = nssa_core::account::Account::default();
-
-        tx_pre_check(&sender_pre.account, &to_acc)?;
-
-        let recipient_pre = AccountWithMetadata::new(to_acc.clone(), false, &to_npk);
-
-        let eph_holder = EphemeralKeyHolder::new(&to_npk);
-
-        let shared_secret_from = eph_holder.calculate_shared_secret_sender(&from_vpk);
-        let shared_secret_to = eph_holder.calculate_shared_secret_sender(&to_vpk);
-
-        let (output, proof) = circuit::execute_and_prove(
-            &[sender_pre, recipient_pre],
-            &instruction_data,
-            &[1, 2],
-            &produce_random_nonces(2),
-            &[
-                (from_npk, shared_secret_from.clone()),
-                (to_npk, shared_secret_to.clone()),
-            ],
-            &[(from_nsk.unwrap(), from_proof.unwrap())],
-            &program.into(),
-        )
-        .unwrap();
-
-        let message = Message::try_from_circuit_output(
-            vec![],
-            vec![],
-            vec![
-                (
-                    from_npk,
-                    from_vpk.clone(),
-                    eph_holder.generate_ephemeral_public_key(),
-                ),
-                (
-                    to_npk,
-                    to_vpk.clone(),
-                    eph_holder.generate_ephemeral_public_key(),
-                ),
-            ],
-            output,
-        )
-        .unwrap();
-
-        let witness_set = WitnessSet::for_message(&message, proof, &[]);
-
-        let tx = PrivacyPreservingTransaction::new(message, witness_set);
-
-        Ok((
-            self.sequencer_client.send_transaction(NSSATransaction::PrivacyPreserving(tx).into()).await?,
-            [shared_secret_from, shared_secret_to],
-        ))
-    }
-
-    pub(crate) async fn deshielded_tx_two_accs(
-        &self,
-        from: AccountId,
-        to: AccountId,
-        instruction_data: InstructionData,
-        tx_pre_check: impl FnOnce(&Account, &Account) -> Result<(), ExecutionFailureKind>,
-        program: Program,
-    ) -> Result<(HashType, [nssa_core::SharedSecretKey; 1]), ExecutionFailureKind> {
-        let AccountPreparedData {
-            nsk: from_nsk,
-            npk: from_npk,
-            vpk: from_vpk,
-            auth_acc: sender_pre,
-            proof: from_proof,
-        } = self.private_acc_preparation(from, true, true).await?;
-
-        let Ok(to_acc) = self.get_account_public(to).await else {
-            return Err(ExecutionFailureKind::KeyNotFoundError);
-        };
-
-        tx_pre_check(&sender_pre.account, &to_acc)?;
-
-        let recipient_pre = AccountWithMetadata::new(to_acc.clone(), false, to);
-
-        let eph_holder = EphemeralKeyHolder::new(&from_npk);
-        let shared_secret = eph_holder.calculate_shared_secret_sender(&from_vpk);
-
-        let (output, proof) = circuit::execute_and_prove(
-            &[sender_pre, recipient_pre],
-            &instruction_data,
-            &[1, 0],
-            &produce_random_nonces(1),
-            &[(from_npk, shared_secret.clone())],
-            &[(from_nsk.unwrap(), from_proof.unwrap())],
-            &program.into(),
-        )
-        .unwrap();
-
-        let message = Message::try_from_circuit_output(
-            vec![to],
-            vec![],
-            vec![(
-                from_npk,
-                from_vpk.clone(),
-                eph_holder.generate_ephemeral_public_key(),
-            )],
-            output,
-        )
-        .unwrap();
-
-        let witness_set = WitnessSet::for_message(&message, proof, &[]);
-
-        let tx = PrivacyPreservingTransaction::new(message, witness_set);
-
-        Ok((
-            self.sequencer_client.send_transaction(NSSATransaction::PrivacyPreserving(tx).into()).await?,
-            [shared_secret],
-        ))
-    }
-
-    pub(crate) async fn shielded_two_accs_all_init(
-        &self,
-        from: AccountId,
-        to: AccountId,
-        instruction_data: InstructionData,
-        tx_pre_check: impl FnOnce(&Account, &Account) -> Result<(), ExecutionFailureKind>,
-        program: Program,
-        to_proof: MembershipProof,
-    ) -> Result<(HashType, [SharedSecretKey; 1]), ExecutionFailureKind> {
-        let Ok(from_acc) = self.get_account_public(from).await else {
-            return Err(ExecutionFailureKind::KeyNotFoundError);
-        };
-
-        let AccountPreparedData {
-            nsk: to_nsk,
-            npk: to_npk,
-            vpk: to_vpk,
-            auth_acc: recipient_pre,
-            proof: _,
-        } = self.private_acc_preparation(to, true, false).await?;
-
-        tx_pre_check(&from_acc, &recipient_pre.account)?;
-
-        let sender_pre = AccountWithMetadata::new(from_acc.clone(), true, from);
-
-        let eph_holder = EphemeralKeyHolder::new(&to_npk);
-        let shared_secret = eph_holder.calculate_shared_secret_sender(&to_vpk);
-
-        let (output, proof) = circuit::execute_and_prove(
-            &[sender_pre, recipient_pre],
-            &instruction_data,
-            &[0, 1],
-            &produce_random_nonces(1),
-            &[(to_npk, shared_secret.clone())],
-            &[(to_nsk.unwrap(), to_proof)],
-            &program.into(),
-        )
-        .unwrap();
-
-        let message = Message::try_from_circuit_output(
-            vec![from],
-            vec![from_acc.nonce],
-            vec![(
-                to_npk,
-                to_vpk.clone(),
-                eph_holder.generate_ephemeral_public_key(),
-            )],
-            output,
-        )
-        .unwrap();
-
-        let signing_key = self.storage.user_data.get_pub_account_signing_key(&from);
-
-        let Some(signing_key) = signing_key else {
-            return Err(ExecutionFailureKind::KeyNotFoundError);
-        };
-
-        let witness_set = WitnessSet::for_message(&message, proof, &[signing_key]);
-
-        let tx = PrivacyPreservingTransaction::new(message, witness_set);
-
-        Ok((
-            self.sequencer_client.send_transaction(NSSATransaction::PrivacyPreserving(tx).into()).await?,
-            [shared_secret],
-        ))
-    }
-
-    pub(crate) async fn shielded_two_accs_receiver_uninit(
-        &self,
-        from: AccountId,
-        to: AccountId,
-        instruction_data: InstructionData,
-        tx_pre_check: impl FnOnce(&Account, &Account) -> Result<(), ExecutionFailureKind>,
-        program: Program,
-    ) -> Result<(HashType, [SharedSecretKey; 1]), ExecutionFailureKind> {
-        let Ok(from_acc) = self.get_account_public(from).await else {
-            return Err(ExecutionFailureKind::KeyNotFoundError);
-        };
-
-        let AccountPreparedData {
-            nsk: _,
-            npk: to_npk,
-            vpk: to_vpk,
-            auth_acc: recipient_pre,
-            proof: _,
-        } = self.private_acc_preparation(to, false, false).await?;
-
-        tx_pre_check(&from_acc, &recipient_pre.account)?;
-
-        let sender_pre = AccountWithMetadata::new(from_acc.clone(), true, from);
-
-        let eph_holder = EphemeralKeyHolder::new(&to_npk);
-        let shared_secret = eph_holder.calculate_shared_secret_sender(&to_vpk);
-
-        let (output, proof) = circuit::execute_and_prove(
-            &[sender_pre, recipient_pre],
-            &instruction_data,
-            &[0, 2],
-            &produce_random_nonces(1),
-            &[(to_npk, shared_secret.clone())],
-            &[],
-            &program.into(),
-        )
-        .unwrap();
-
-        let message = Message::try_from_circuit_output(
-            vec![from],
-            vec![from_acc.nonce],
-            vec![(
-                to_npk,
-                to_vpk.clone(),
-                eph_holder.generate_ephemeral_public_key(),
-            )],
-            output,
-        )
-        .unwrap();
-
-        let signing_key = self.storage.user_data.get_pub_account_signing_key(&from);
-
-        let Some(signing_key) = signing_key else {
-            return Err(ExecutionFailureKind::KeyNotFoundError);
-        };
-
-        let witness_set = WitnessSet::for_message(&message, proof, &[signing_key]);
-
-        let tx = PrivacyPreservingTransaction::new(message, witness_set);
-
-        Ok((
-            self.sequencer_client.send_transaction(NSSATransaction::PrivacyPreserving(tx).into()).await?,
-            [shared_secret],
-        ))
-    }
-
-    pub(crate) async fn shielded_two_accs_receiver_outer(
-        &self,
-        from: AccountId,
-        to_npk: NullifierPublicKey,
-        to_vpk: ViewingPublicKey,
-        instruction_data: InstructionData,
-        tx_pre_check: impl FnOnce(&Account, &Account) -> Result<(), ExecutionFailureKind>,
-        program: Program,
-    ) -> Result<HashType, ExecutionFailureKind> {
-        let Ok(from_acc) = self.get_account_public(from).await else {
-            return Err(ExecutionFailureKind::KeyNotFoundError);
-        };
-
-        let to_acc = Account::default();
-
-        tx_pre_check(&from_acc, &to_acc)?;
-
-        let sender_pre = AccountWithMetadata::new(from_acc.clone(), true, from);
-        let recipient_pre = AccountWithMetadata::new(to_acc.clone(), false, &to_npk);
-
-        let eph_holder = EphemeralKeyHolder::new(&to_npk);
-        let shared_secret = eph_holder.calculate_shared_secret_sender(&to_vpk);
-
-        let (output, proof) = circuit::execute_and_prove(
-            &[sender_pre, recipient_pre],
-            &instruction_data,
-            &[0, 2],
-            &produce_random_nonces(1),
-            &[(to_npk, shared_secret.clone())],
-            &[],
-            &program.into(),
-        )
-        .unwrap();
-
-        let message = Message::try_from_circuit_output(
-            vec![from],
-            vec![from_acc.nonce],
-            vec![(
-                to_npk,
-                to_vpk.clone(),
-                eph_holder.generate_ephemeral_public_key(),
-            )],
-            output,
-        )
-        .unwrap();
-
-        let signing_key = self.storage.user_data.get_pub_account_signing_key(&from);
-
-        let Some(signing_key) = signing_key else {
-            return Err(ExecutionFailureKind::KeyNotFoundError);
-        };
-
-        let witness_set = WitnessSet::for_message(&message, proof, &[signing_key]);
-        let tx = PrivacyPreservingTransaction::new(message, witness_set);
-
-        Ok(self.sequencer_client.send_transaction(NSSATransaction::PrivacyPreserving(tx).into()).await?)
-    }
-
-    pub async fn register_account_under_authenticated_transfers_programs_private(
-        &self,
-        from: AccountId,
-    ) -> Result<(HashType, [SharedSecretKey; 1]), ExecutionFailureKind> {
-        let AccountPreparedData {
-            nsk: _,
-            npk: from_npk,
-            vpk: from_vpk,
-            auth_acc: sender_pre,
-            proof: _,
-        } = self.private_acc_preparation(from, false, false).await?;
-
-        let eph_holder_from = EphemeralKeyHolder::new(&from_npk);
-        let shared_secret_from = eph_holder_from.calculate_shared_secret_sender(&from_vpk);
-
-        let instruction: u128 = 0;
-
-        let (output, proof) = circuit::execute_and_prove(
-            &[sender_pre],
-            &Program::serialize_instruction(instruction).unwrap(),
-            &[2],
-            &produce_random_nonces(1),
-            &[(from_npk, shared_secret_from.clone())],
-            &[],
-            &Program::authenticated_transfer_program().into(),
-        )
-        .unwrap();
-
-        let message = Message::try_from_circuit_output(
-            vec![],
-            vec![],
-            vec![(
-                from_npk,
-                from_vpk.clone(),
-                eph_holder_from.generate_ephemeral_public_key(),
-            )],
-            output,
-        )
-        .unwrap();
-
-        let witness_set = WitnessSet::for_message(&message, proof, &[]);
-        let tx = PrivacyPreservingTransaction::new(message, witness_set);
-
-        Ok((
-            self.sequencer_client.send_transaction(NSSATransaction::PrivacyPreserving(tx).into()).await?,
-            [shared_secret_from],
-        ))
-    }
-}