diff --git a/LICENSE b/LICENSE
index 915b62e..8efb4fd 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,7 @@
 MIT License
 
 Copyright (c) 2021 Dean Eigenmann
+Copyright (c) 2022 Status Research & Development GmbH
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/Makefile b/Makefile
index 6b2be34..e877c18 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,20 @@
 .PHONY: rlnlib
 
-rlnlib:
-	sh scripts/build.sh
+SHELL := bash # the shell used internally by Make
+
+GOBIN ?= $(shell which go)
+
+rlnlib-cross:
+	scripts/build-cross.sh
 	cd lib/rln && cbindgen --config ../cbindgen.toml --crate rln --output ../../rln/librln.h --lang c
+
+rlnlib:
+	scripts/build.sh
+	cd lib/rln && cbindgen --config ../cbindgen.toml --crate rln --output ../../rln/librln.h --lang c
+
+generate:
+	${GOBIN} generate ./rln/pb/generate.go
+	${GOBIN} generate ./rln/contracts/generate.go
+
+test:
+	LD_LIBRARY_PATH="${PWD}/libs/x86_64-unknown-linux-gnu/" go test ./... -count 1 -v
\ No newline at end of file
diff --git a/README.md b/README.md
index 415a790..8a31436 100644
--- a/README.md
+++ b/README.md
@@ -10,3 +10,36 @@ Further research can be found here:
 
 The goal of this is to create a rate-limiter for blockchains where block production is cheap. I started playing around with this
 after talking to the team at [Celestia](https://celestia.org/).
+
+
+### Building this library
+
+#### Using [cross](https://github.com/cross-rs)
+
+```
+make rlnlibs-cross
+```
+
+Some architectures are not available in cross unless they're locally build. This [PR](https://github.com/cross-rs/cross/pull/591) will update ubuntu base version on cross. But while it's merged, build them locally. To build them locally execute the following instructions (adapted from [here](https://github.com/cross-rs/cross/wiki/FAQ#newer-linux-versions)):
+
+```
+git clone --single-branch --depth 1 --branch increment_versions https://github.com/Alexhuszagh/cross
+cd cross
+cargo build-docker-image x86_64-pc-windows-gnu
+cargo build-docker-image aarch64-unknown-linux-gnu
+cargo build-docker-image x86_64-unknown-linux-gnu
+cargo build-docker-image arm-unknown-linux-gnueabi
+cargo build-docker-image i686-pc-windows-gnu
+cargo build-docker-image i686-unknown-linux-gnu
+cargo build-docker-image arm-unknown-linux-gnueabihf
+cargo build-docker-image mips-unknown-linux-gnu
+cargo build-docker-image mips64-unknown-linux-gnuabi64
+cargo build-docker-image mips64el-unknown-linux-gnuabi64
+cargo build-docker-image mipsel-unknown-linux-gnu
+```
+
+#### Using [rustup](https://rust-lang.github.io/rustup/cross-compilation.html)
+
+```
+make rlnlibs-cross
+```
\ No newline at end of file
diff --git a/go.mod b/go.mod
index a527e55..8c85738 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,9 @@
 module github.com/decanus/go-rln
 
 go 1.16
+
+require (
+	github.com/ethereum/go-ethereum v1.10.20
+	github.com/golang/protobuf v1.5.2
+	github.com/stretchr/testify v1.7.2
+)
diff --git a/go.sum b/go.sum
index e29e10a..168f86b 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,622 @@
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diff --git a/lib/rln b/lib/rln
index 628fd74..7ac7418 160000
--- a/lib/rln
+++ b/lib/rln
@@ -1 +1 @@
-Subproject commit 628fd742237f49347469dfcbbe57fd591d6629b1
+Subproject commit 7ac74183f8b69b399e3bc96c1ae8ab61c026dc43
diff --git a/libs/aarch64-linux-android/librln.d b/libs/aarch64-linux-android/librln.d
new file mode 100644
index 0000000..7834959
--- /dev/null
+++ b/libs/aarch64-linux-android/librln.d
@@ -0,0 +1 @@
+/target/aarch64-linux-android/release/librln.so: /project/src/circuit/mod.rs /project/src/circuit/polynomial.rs /project/src/circuit/poseidon.rs /project/src/circuit/rln.rs /project/src/ffi.rs /project/src/hash_to_field.rs /project/src/lib.rs /project/src/merkle.rs /project/src/poseidon.rs /project/src/public.rs /project/src/utils.rs /target/aarch64-linux-android/release/build/num-bigint-4ba1a00c5942ed3b/out/radix_bases.rs build.rs
diff --git a/libs/aarch64-linux-android/librln.rlib b/libs/aarch64-linux-android/librln.rlib
new file mode 100644
index 0000000..ade059f
Binary files /dev/null and b/libs/aarch64-linux-android/librln.rlib differ
diff --git a/libs/aarch64-unknown-linux-gnu/librln.d b/libs/aarch64-unknown-linux-gnu/librln.d
new file mode 100644
index 0000000..662d2d7
--- /dev/null
+++ b/libs/aarch64-unknown-linux-gnu/librln.d
@@ -0,0 +1 @@
+/target/aarch64-unknown-linux-gnu/release/librln.so: /project/src/circuit/mod.rs /project/src/circuit/polynomial.rs /project/src/circuit/poseidon.rs /project/src/circuit/rln.rs /project/src/ffi.rs /project/src/hash_to_field.rs /project/src/lib.rs /project/src/merkle.rs /project/src/poseidon.rs /project/src/public.rs /project/src/utils.rs /target/aarch64-unknown-linux-gnu/release/build/num-bigint-69b80aa090dc4b25/out/radix_bases.rs build.rs
diff --git a/libs/aarch64-unknown-linux-gnu/librln.rlib b/libs/aarch64-unknown-linux-gnu/librln.rlib
new file mode 100644
index 0000000..df00039
Binary files /dev/null and b/libs/aarch64-unknown-linux-gnu/librln.rlib differ
diff --git a/libs/arm-unknown-linux-gnueabi/librln.d b/libs/arm-unknown-linux-gnueabi/librln.d
new file mode 100644
index 0000000..b5c51e8
--- /dev/null
+++ b/libs/arm-unknown-linux-gnueabi/librln.d
@@ -0,0 +1 @@
+/target/arm-unknown-linux-gnueabi/release/librln.so: /project/src/circuit/mod.rs /project/src/circuit/polynomial.rs /project/src/circuit/poseidon.rs /project/src/circuit/rln.rs /project/src/ffi.rs /project/src/hash_to_field.rs /project/src/lib.rs /project/src/merkle.rs /project/src/poseidon.rs /project/src/public.rs /project/src/utils.rs /target/arm-unknown-linux-gnueabi/release/build/num-bigint-9bbf2c096f81fccc/out/radix_bases.rs build.rs
diff --git a/libs/arm-unknown-linux-gnueabi/librln.rlib b/libs/arm-unknown-linux-gnueabi/librln.rlib
new file mode 100644
index 0000000..6b54527
Binary files /dev/null and b/libs/arm-unknown-linux-gnueabi/librln.rlib differ
diff --git a/libs/arm-unknown-linux-gnueabihf/librln.d b/libs/arm-unknown-linux-gnueabihf/librln.d
new file mode 100644
index 0000000..82701e9
--- /dev/null
+++ b/libs/arm-unknown-linux-gnueabihf/librln.d
@@ -0,0 +1 @@
+/target/arm-unknown-linux-gnueabihf/release/librln.so: /project/src/circuit/mod.rs /project/src/circuit/polynomial.rs /project/src/circuit/poseidon.rs /project/src/circuit/rln.rs /project/src/ffi.rs /project/src/hash_to_field.rs /project/src/lib.rs /project/src/merkle.rs /project/src/poseidon.rs /project/src/public.rs /project/src/utils.rs /target/arm-unknown-linux-gnueabihf/release/build/num-bigint-c5d4eab0df01f46f/out/radix_bases.rs build.rs
diff --git a/libs/arm-unknown-linux-gnueabihf/librln.rlib b/libs/arm-unknown-linux-gnueabihf/librln.rlib
new file mode 100644
index 0000000..1e4998a
Binary files /dev/null and b/libs/arm-unknown-linux-gnueabihf/librln.rlib differ
diff --git a/libs/armv7-linux-androideabi/librln.d b/libs/armv7-linux-androideabi/librln.d
new file mode 100644
index 0000000..7cfd9f8
--- /dev/null
+++ b/libs/armv7-linux-androideabi/librln.d
@@ -0,0 +1 @@
+/target/armv7-linux-androideabi/release/librln.so: /project/src/circuit/mod.rs /project/src/circuit/polynomial.rs /project/src/circuit/poseidon.rs /project/src/circuit/rln.rs /project/src/ffi.rs /project/src/hash_to_field.rs /project/src/lib.rs /project/src/merkle.rs /project/src/poseidon.rs /project/src/public.rs /project/src/utils.rs /target/armv7-linux-androideabi/release/build/num-bigint-8fa42ea69abd53fb/out/radix_bases.rs build.rs
diff --git a/libs/armv7-linux-androideabi/librln.rlib b/libs/armv7-linux-androideabi/librln.rlib
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index 0000000..7caf0af
Binary files /dev/null and b/libs/armv7-linux-androideabi/librln.rlib differ
diff --git a/libs/i686-linux-android/librln.d b/libs/i686-linux-android/librln.d
new file mode 100644
index 0000000..ae956f5
--- /dev/null
+++ b/libs/i686-linux-android/librln.d
@@ -0,0 +1 @@
+/target/i686-linux-android/release/librln.so: /project/src/circuit/mod.rs /project/src/circuit/polynomial.rs /project/src/circuit/poseidon.rs /project/src/circuit/rln.rs /project/src/ffi.rs /project/src/hash_to_field.rs /project/src/lib.rs /project/src/merkle.rs /project/src/poseidon.rs /project/src/public.rs /project/src/utils.rs /target/i686-linux-android/release/build/num-bigint-5b002515a3c1c3de/out/radix_bases.rs build.rs
diff --git a/libs/i686-linux-android/librln.rlib b/libs/i686-linux-android/librln.rlib
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Binary files /dev/null and b/libs/i686-linux-android/librln.rlib differ
diff --git a/libs/i686-pc-windows-gnu/librln.d b/libs/i686-pc-windows-gnu/librln.d
new file mode 100644
index 0000000..c240a71
--- /dev/null
+++ b/libs/i686-pc-windows-gnu/librln.d
@@ -0,0 +1 @@
+/target/i686-pc-windows-gnu/release/librln.rlib: /project/src/circuit/mod.rs /project/src/circuit/polynomial.rs /project/src/circuit/poseidon.rs /project/src/circuit/rln.rs /project/src/ffi.rs /project/src/hash_to_field.rs /project/src/lib.rs /project/src/merkle.rs /project/src/poseidon.rs /project/src/public.rs /project/src/utils.rs /target/i686-pc-windows-gnu/release/build/num-bigint-cab2a6b70097bfc3/out/radix_bases.rs build.rs
diff --git a/libs/i686-pc-windows-gnu/librln.dll.a b/libs/i686-pc-windows-gnu/librln.dll.a
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index 0000000..1acf675
Binary files /dev/null and b/libs/i686-pc-windows-gnu/librln.dll.a differ
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index 0000000..8a8c777
Binary files /dev/null and b/libs/i686-pc-windows-gnu/librln.rlib differ
diff --git a/libs/i686-unknown-linux-gnu/librln.d b/libs/i686-unknown-linux-gnu/librln.d
new file mode 100644
index 0000000..3e5005b
--- /dev/null
+++ b/libs/i686-unknown-linux-gnu/librln.d
@@ -0,0 +1 @@
+/target/i686-unknown-linux-gnu/release/librln.so: /project/src/circuit/mod.rs /project/src/circuit/polynomial.rs /project/src/circuit/poseidon.rs /project/src/circuit/rln.rs /project/src/ffi.rs /project/src/hash_to_field.rs /project/src/lib.rs /project/src/merkle.rs /project/src/poseidon.rs /project/src/public.rs /project/src/utils.rs /target/i686-unknown-linux-gnu/release/build/num-bigint-b0e1c075ff9f6d68/out/radix_bases.rs build.rs
diff --git a/libs/i686-unknown-linux-gnu/librln.rlib b/libs/i686-unknown-linux-gnu/librln.rlib
new file mode 100644
index 0000000..7e9e39b
Binary files /dev/null and b/libs/i686-unknown-linux-gnu/librln.rlib differ
diff --git a/libs/mips-unknown-linux-gnu/librln.d b/libs/mips-unknown-linux-gnu/librln.d
new file mode 100644
index 0000000..0c3f27e
--- /dev/null
+++ b/libs/mips-unknown-linux-gnu/librln.d
@@ -0,0 +1 @@
+/target/mips-unknown-linux-gnu/release/librln.so: /project/src/circuit/mod.rs /project/src/circuit/polynomial.rs /project/src/circuit/poseidon.rs /project/src/circuit/rln.rs /project/src/ffi.rs /project/src/hash_to_field.rs /project/src/lib.rs /project/src/merkle.rs /project/src/poseidon.rs /project/src/public.rs /project/src/utils.rs /target/mips-unknown-linux-gnu/release/build/num-bigint-2a58e28365905d0a/out/radix_bases.rs build.rs
diff --git a/libs/mips-unknown-linux-gnu/librln.rlib b/libs/mips-unknown-linux-gnu/librln.rlib
new file mode 100644
index 0000000..ef12d55
Binary files /dev/null and b/libs/mips-unknown-linux-gnu/librln.rlib differ
diff --git a/libs/mips64-unknown-linux-gnuabi64/librln.d b/libs/mips64-unknown-linux-gnuabi64/librln.d
new file mode 100644
index 0000000..95c46ff
--- /dev/null
+++ b/libs/mips64-unknown-linux-gnuabi64/librln.d
@@ -0,0 +1 @@
+/target/mips64-unknown-linux-gnuabi64/release/librln.so: /project/src/circuit/mod.rs /project/src/circuit/polynomial.rs /project/src/circuit/poseidon.rs /project/src/circuit/rln.rs /project/src/ffi.rs /project/src/hash_to_field.rs /project/src/lib.rs /project/src/merkle.rs /project/src/poseidon.rs /project/src/public.rs /project/src/utils.rs /target/mips64-unknown-linux-gnuabi64/release/build/num-bigint-a70850dcc99c7fb1/out/radix_bases.rs build.rs
diff --git a/libs/mips64-unknown-linux-gnuabi64/librln.rlib b/libs/mips64-unknown-linux-gnuabi64/librln.rlib
new file mode 100644
index 0000000..c3b6d38
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diff --git a/libs/mips64el-unknown-linux-gnuabi64/librln.d b/libs/mips64el-unknown-linux-gnuabi64/librln.d
new file mode 100644
index 0000000..3ceaf0f
--- /dev/null
+++ b/libs/mips64el-unknown-linux-gnuabi64/librln.d
@@ -0,0 +1 @@
+/target/mips64el-unknown-linux-gnuabi64/release/librln.so: /project/src/circuit/mod.rs /project/src/circuit/polynomial.rs /project/src/circuit/poseidon.rs /project/src/circuit/rln.rs /project/src/ffi.rs /project/src/hash_to_field.rs /project/src/lib.rs /project/src/merkle.rs /project/src/poseidon.rs /project/src/public.rs /project/src/utils.rs /target/mips64el-unknown-linux-gnuabi64/release/build/num-bigint-0b729d8fe959893e/out/radix_bases.rs build.rs
diff --git a/libs/mips64el-unknown-linux-gnuabi64/librln.rlib b/libs/mips64el-unknown-linux-gnuabi64/librln.rlib
new file mode 100644
index 0000000..8a244c7
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diff --git a/libs/mipsel-unknown-linux-gnu/librln.d b/libs/mipsel-unknown-linux-gnu/librln.d
new file mode 100644
index 0000000..0705146
--- /dev/null
+++ b/libs/mipsel-unknown-linux-gnu/librln.d
@@ -0,0 +1 @@
+/target/mipsel-unknown-linux-gnu/release/librln.so: /project/src/circuit/mod.rs /project/src/circuit/polynomial.rs /project/src/circuit/poseidon.rs /project/src/circuit/rln.rs /project/src/ffi.rs /project/src/hash_to_field.rs /project/src/lib.rs /project/src/merkle.rs /project/src/poseidon.rs /project/src/public.rs /project/src/utils.rs /target/mipsel-unknown-linux-gnu/release/build/num-bigint-23ad468891d1fc36/out/radix_bases.rs build.rs
diff --git a/libs/mipsel-unknown-linux-gnu/librln.rlib b/libs/mipsel-unknown-linux-gnu/librln.rlib
new file mode 100644
index 0000000..7e9f564
Binary files /dev/null and b/libs/mipsel-unknown-linux-gnu/librln.rlib differ
diff --git a/libs/x86_64-apple-darwin/librln.d b/libs/x86_64-apple-darwin/librln.d
deleted file mode 100644
index eca7915..0000000
--- a/libs/x86_64-apple-darwin/librln.d
+++ /dev/null
@@ -1 +0,0 @@
-/Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/target/x86_64-apple-darwin/release/librln.dylib: /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/circuit/mod.rs /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/circuit/polynomial.rs /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/circuit/poseidon.rs /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/circuit/rln.rs /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/ffi.rs /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/lib.rs /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/merkle.rs /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/poseidon.rs /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/public.rs /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/utils.rs
diff --git a/libs/x86_64-apple-darwin/librln.rlib b/libs/x86_64-apple-darwin/librln.rlib
deleted file mode 100644
index 2f5185f..0000000
Binary files a/libs/x86_64-apple-darwin/librln.rlib and /dev/null differ
diff --git a/libs/x86_64-linux-android/librln.d b/libs/x86_64-linux-android/librln.d
new file mode 100644
index 0000000..9f741e7
--- /dev/null
+++ b/libs/x86_64-linux-android/librln.d
@@ -0,0 +1 @@
+/target/x86_64-linux-android/release/librln.so: /project/src/circuit/mod.rs /project/src/circuit/polynomial.rs /project/src/circuit/poseidon.rs /project/src/circuit/rln.rs /project/src/ffi.rs /project/src/hash_to_field.rs /project/src/lib.rs /project/src/merkle.rs /project/src/poseidon.rs /project/src/public.rs /project/src/utils.rs /target/x86_64-linux-android/release/build/num-bigint-a07eaff1eafc61a9/out/radix_bases.rs build.rs
diff --git a/libs/x86_64-linux-android/librln.rlib b/libs/x86_64-linux-android/librln.rlib
new file mode 100644
index 0000000..dc1ec97
Binary files /dev/null and b/libs/x86_64-linux-android/librln.rlib differ
diff --git a/libs/x86_64-pc-windows-gnu/librln.d b/libs/x86_64-pc-windows-gnu/librln.d
new file mode 100644
index 0000000..f59b149
--- /dev/null
+++ b/libs/x86_64-pc-windows-gnu/librln.d
@@ -0,0 +1 @@
+/target/x86_64-pc-windows-gnu/release/librln.rlib: /project/src/circuit/mod.rs /project/src/circuit/polynomial.rs /project/src/circuit/poseidon.rs /project/src/circuit/rln.rs /project/src/ffi.rs /project/src/hash_to_field.rs /project/src/lib.rs /project/src/merkle.rs /project/src/poseidon.rs /project/src/public.rs /project/src/utils.rs /target/x86_64-pc-windows-gnu/release/build/num-bigint-2d87d54ca5f526b6/out/radix_bases.rs build.rs
diff --git a/libs/x86_64-pc-windows-gnu/librln.dll.a b/libs/x86_64-pc-windows-gnu/librln.dll.a
new file mode 100644
index 0000000..b10aa1a
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diff --git a/libs/x86_64-pc-windows-gnu/librln.rlib b/libs/x86_64-pc-windows-gnu/librln.rlib
new file mode 100644
index 0000000..ff7f9c3
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diff --git a/libs/x86_64-unknown-linux-gnu/librln.d b/libs/x86_64-unknown-linux-gnu/librln.d
new file mode 100644
index 0000000..b1393c5
--- /dev/null
+++ b/libs/x86_64-unknown-linux-gnu/librln.d
@@ -0,0 +1 @@
+/target/x86_64-unknown-linux-gnu/release/librln.so: /project/src/circuit/mod.rs /project/src/circuit/polynomial.rs /project/src/circuit/poseidon.rs /project/src/circuit/rln.rs /project/src/ffi.rs /project/src/hash_to_field.rs /project/src/lib.rs /project/src/merkle.rs /project/src/poseidon.rs /project/src/public.rs /project/src/utils.rs /target/x86_64-unknown-linux-gnu/release/build/num-bigint-e05ef1c2b46a8adc/out/radix_bases.rs build.rs
diff --git a/libs/x86_64-unknown-linux-gnu/librln.rlib b/libs/x86_64-unknown-linux-gnu/librln.rlib
new file mode 100644
index 0000000..58eb28b
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diff --git a/libs/x86_64-unknown-linux-musl/librln.d b/libs/x86_64-unknown-linux-musl/librln.d
index 5baae82..85dcdc8 100644
--- a/libs/x86_64-unknown-linux-musl/librln.d
+++ b/libs/x86_64-unknown-linux-musl/librln.d
@@ -1 +1 @@
-/Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/target/x86_64-unknown-linux-musl/release/librln.rlib: /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/circuit/mod.rs /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/circuit/polynomial.rs /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/circuit/poseidon.rs /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/circuit/rln.rs /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/ffi.rs /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/lib.rs /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/merkle.rs /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/poseidon.rs /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/public.rs /Users/deaneigenmann/go/src/github.com/decanus/go-rln/lib/rln/src/utils.rs
+/target/x86_64-unknown-linux-musl/release/librln.rlib: /project/src/circuit/mod.rs /project/src/circuit/polynomial.rs /project/src/circuit/poseidon.rs /project/src/circuit/rln.rs /project/src/ffi.rs /project/src/hash_to_field.rs /project/src/lib.rs /project/src/merkle.rs /project/src/poseidon.rs /project/src/public.rs /project/src/utils.rs /target/x86_64-unknown-linux-musl/release/build/num-bigint-11903a3d0fc503f2/out/radix_bases.rs build.rs
diff --git a/libs/x86_64-unknown-linux-musl/librln.rlib b/libs/x86_64-unknown-linux-musl/librln.rlib
index fcc073e..f110e4c 100644
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diff --git a/rln/contracts/RLN.go b/rln/contracts/RLN.go
new file mode 100644
index 0000000..03521e4
--- /dev/null
+++ b/rln/contracts/RLN.go
@@ -0,0 +1,1222 @@
+// Code generated - DO NOT EDIT.
+// This file is a generated binding and any manual changes will be lost.
+
+package contracts
+
+import (
+	"math/big"
+	"strings"
+
+	ethereum "github.com/ethereum/go-ethereum"
+	"github.com/ethereum/go-ethereum/accounts/abi"
+	"github.com/ethereum/go-ethereum/accounts/abi/bind"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/event"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var (
+	_ = big.NewInt
+	_ = strings.NewReader
+	_ = ethereum.NotFound
+	_ = bind.Bind
+	_ = common.Big1
+	_ = types.BloomLookup
+	_ = event.NewSubscription
+)
+
+// IPoseidonHasherABI is the input ABI used to generate the binding from.
+const IPoseidonHasherABI = "[{\"inputs\":[{\"internalType\":\"uint256[2]\",\"name\":\"input\",\"type\":\"uint256[2]\"}],\"name\":\"hash\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"result\",\"type\":\"uint256\"}],\"stateMutability\":\"pure\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"identity\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"pure\",\"type\":\"function\"}]"
+
+// IPoseidonHasherFuncSigs maps the 4-byte function signature to its string representation.
+var IPoseidonHasherFuncSigs = map[string]string{
+	"561558fe": "hash(uint256[2])",
+	"2c159a1a": "identity()",
+}
+
+// IPoseidonHasher is an auto generated Go binding around an Ethereum contract.
+type IPoseidonHasher struct {
+	IPoseidonHasherCaller     // Read-only binding to the contract
+	IPoseidonHasherTransactor // Write-only binding to the contract
+	IPoseidonHasherFilterer   // Log filterer for contract events
+}
+
+// IPoseidonHasherCaller is an auto generated read-only Go binding around an Ethereum contract.
+type IPoseidonHasherCaller struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// IPoseidonHasherTransactor is an auto generated write-only Go binding around an Ethereum contract.
+type IPoseidonHasherTransactor struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// IPoseidonHasherFilterer is an auto generated log filtering Go binding around an Ethereum contract events.
+type IPoseidonHasherFilterer struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// IPoseidonHasherSession is an auto generated Go binding around an Ethereum contract,
+// with pre-set call and transact options.
+type IPoseidonHasherSession struct {
+	Contract     *IPoseidonHasher  // Generic contract binding to set the session for
+	CallOpts     bind.CallOpts     // Call options to use throughout this session
+	TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
+}
+
+// IPoseidonHasherCallerSession is an auto generated read-only Go binding around an Ethereum contract,
+// with pre-set call options.
+type IPoseidonHasherCallerSession struct {
+	Contract *IPoseidonHasherCaller // Generic contract caller binding to set the session for
+	CallOpts bind.CallOpts          // Call options to use throughout this session
+}
+
+// IPoseidonHasherTransactorSession is an auto generated write-only Go binding around an Ethereum contract,
+// with pre-set transact options.
+type IPoseidonHasherTransactorSession struct {
+	Contract     *IPoseidonHasherTransactor // Generic contract transactor binding to set the session for
+	TransactOpts bind.TransactOpts          // Transaction auth options to use throughout this session
+}
+
+// IPoseidonHasherRaw is an auto generated low-level Go binding around an Ethereum contract.
+type IPoseidonHasherRaw struct {
+	Contract *IPoseidonHasher // Generic contract binding to access the raw methods on
+}
+
+// IPoseidonHasherCallerRaw is an auto generated low-level read-only Go binding around an Ethereum contract.
+type IPoseidonHasherCallerRaw struct {
+	Contract *IPoseidonHasherCaller // Generic read-only contract binding to access the raw methods on
+}
+
+// IPoseidonHasherTransactorRaw is an auto generated low-level write-only Go binding around an Ethereum contract.
+type IPoseidonHasherTransactorRaw struct {
+	Contract *IPoseidonHasherTransactor // Generic write-only contract binding to access the raw methods on
+}
+
+// NewIPoseidonHasher creates a new instance of IPoseidonHasher, bound to a specific deployed contract.
+func NewIPoseidonHasher(address common.Address, backend bind.ContractBackend) (*IPoseidonHasher, error) {
+	contract, err := bindIPoseidonHasher(address, backend, backend, backend)
+	if err != nil {
+		return nil, err
+	}
+	return &IPoseidonHasher{IPoseidonHasherCaller: IPoseidonHasherCaller{contract: contract}, IPoseidonHasherTransactor: IPoseidonHasherTransactor{contract: contract}, IPoseidonHasherFilterer: IPoseidonHasherFilterer{contract: contract}}, nil
+}
+
+// NewIPoseidonHasherCaller creates a new read-only instance of IPoseidonHasher, bound to a specific deployed contract.
+func NewIPoseidonHasherCaller(address common.Address, caller bind.ContractCaller) (*IPoseidonHasherCaller, error) {
+	contract, err := bindIPoseidonHasher(address, caller, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &IPoseidonHasherCaller{contract: contract}, nil
+}
+
+// NewIPoseidonHasherTransactor creates a new write-only instance of IPoseidonHasher, bound to a specific deployed contract.
+func NewIPoseidonHasherTransactor(address common.Address, transactor bind.ContractTransactor) (*IPoseidonHasherTransactor, error) {
+	contract, err := bindIPoseidonHasher(address, nil, transactor, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &IPoseidonHasherTransactor{contract: contract}, nil
+}
+
+// NewIPoseidonHasherFilterer creates a new log filterer instance of IPoseidonHasher, bound to a specific deployed contract.
+func NewIPoseidonHasherFilterer(address common.Address, filterer bind.ContractFilterer) (*IPoseidonHasherFilterer, error) {
+	contract, err := bindIPoseidonHasher(address, nil, nil, filterer)
+	if err != nil {
+		return nil, err
+	}
+	return &IPoseidonHasherFilterer{contract: contract}, nil
+}
+
+// bindIPoseidonHasher binds a generic wrapper to an already deployed contract.
+func bindIPoseidonHasher(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
+	parsed, err := abi.JSON(strings.NewReader(IPoseidonHasherABI))
+	if err != nil {
+		return nil, err
+	}
+	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_IPoseidonHasher *IPoseidonHasherRaw) Call(opts *bind.CallOpts, result *[]interface{}, method string, params ...interface{}) error {
+	return _IPoseidonHasher.Contract.IPoseidonHasherCaller.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_IPoseidonHasher *IPoseidonHasherRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _IPoseidonHasher.Contract.IPoseidonHasherTransactor.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_IPoseidonHasher *IPoseidonHasherRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _IPoseidonHasher.Contract.IPoseidonHasherTransactor.contract.Transact(opts, method, params...)
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_IPoseidonHasher *IPoseidonHasherCallerRaw) Call(opts *bind.CallOpts, result *[]interface{}, method string, params ...interface{}) error {
+	return _IPoseidonHasher.Contract.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_IPoseidonHasher *IPoseidonHasherTransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _IPoseidonHasher.Contract.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_IPoseidonHasher *IPoseidonHasherTransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _IPoseidonHasher.Contract.contract.Transact(opts, method, params...)
+}
+
+// Hash is a free data retrieval call binding the contract method 0x561558fe.
+//
+// Solidity: function hash(uint256[2] input) pure returns(uint256 result)
+func (_IPoseidonHasher *IPoseidonHasherCaller) Hash(opts *bind.CallOpts, input [2]*big.Int) (*big.Int, error) {
+	var out []interface{}
+	err := _IPoseidonHasher.contract.Call(opts, &out, "hash", input)
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// Hash is a free data retrieval call binding the contract method 0x561558fe.
+//
+// Solidity: function hash(uint256[2] input) pure returns(uint256 result)
+func (_IPoseidonHasher *IPoseidonHasherSession) Hash(input [2]*big.Int) (*big.Int, error) {
+	return _IPoseidonHasher.Contract.Hash(&_IPoseidonHasher.CallOpts, input)
+}
+
+// Hash is a free data retrieval call binding the contract method 0x561558fe.
+//
+// Solidity: function hash(uint256[2] input) pure returns(uint256 result)
+func (_IPoseidonHasher *IPoseidonHasherCallerSession) Hash(input [2]*big.Int) (*big.Int, error) {
+	return _IPoseidonHasher.Contract.Hash(&_IPoseidonHasher.CallOpts, input)
+}
+
+// Identity is a free data retrieval call binding the contract method 0x2c159a1a.
+//
+// Solidity: function identity() pure returns(uint256)
+func (_IPoseidonHasher *IPoseidonHasherCaller) Identity(opts *bind.CallOpts) (*big.Int, error) {
+	var out []interface{}
+	err := _IPoseidonHasher.contract.Call(opts, &out, "identity")
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// Identity is a free data retrieval call binding the contract method 0x2c159a1a.
+//
+// Solidity: function identity() pure returns(uint256)
+func (_IPoseidonHasher *IPoseidonHasherSession) Identity() (*big.Int, error) {
+	return _IPoseidonHasher.Contract.Identity(&_IPoseidonHasher.CallOpts)
+}
+
+// Identity is a free data retrieval call binding the contract method 0x2c159a1a.
+//
+// Solidity: function identity() pure returns(uint256)
+func (_IPoseidonHasher *IPoseidonHasherCallerSession) Identity() (*big.Int, error) {
+	return _IPoseidonHasher.Contract.Identity(&_IPoseidonHasher.CallOpts)
+}
+
+// PoseidonHasherABI is the input ABI used to generate the binding from.
+const PoseidonHasherABI = "[{\"inputs\":[{\"internalType\":\"uint256[2]\",\"name\":\"input\",\"type\":\"uint256[2]\"}],\"name\":\"hash\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"result\",\"type\":\"uint256\"}],\"stateMutability\":\"pure\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"identity\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"pure\",\"type\":\"function\"}]"
+
+// PoseidonHasherFuncSigs maps the 4-byte function signature to its string representation.
+var PoseidonHasherFuncSigs = map[string]string{
+	"561558fe": "hash(uint256[2])",
+	"2c159a1a": "identity()",
+}
+
+// PoseidonHasherBin is the compiled bytecode used for deploying new contracts.
+var PoseidonHasherBin = 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+
+// DeployPoseidonHasher deploys a new Ethereum contract, binding an instance of PoseidonHasher to it.
+func DeployPoseidonHasher(auth *bind.TransactOpts, backend bind.ContractBackend) (common.Address, *types.Transaction, *PoseidonHasher, error) {
+	parsed, err := abi.JSON(strings.NewReader(PoseidonHasherABI))
+	if err != nil {
+		return common.Address{}, nil, nil, err
+	}
+
+	address, tx, contract, err := bind.DeployContract(auth, parsed, common.FromHex(PoseidonHasherBin), backend)
+	if err != nil {
+		return common.Address{}, nil, nil, err
+	}
+	return address, tx, &PoseidonHasher{PoseidonHasherCaller: PoseidonHasherCaller{contract: contract}, PoseidonHasherTransactor: PoseidonHasherTransactor{contract: contract}, PoseidonHasherFilterer: PoseidonHasherFilterer{contract: contract}}, nil
+}
+
+// PoseidonHasher is an auto generated Go binding around an Ethereum contract.
+type PoseidonHasher struct {
+	PoseidonHasherCaller     // Read-only binding to the contract
+	PoseidonHasherTransactor // Write-only binding to the contract
+	PoseidonHasherFilterer   // Log filterer for contract events
+}
+
+// PoseidonHasherCaller is an auto generated read-only Go binding around an Ethereum contract.
+type PoseidonHasherCaller struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// PoseidonHasherTransactor is an auto generated write-only Go binding around an Ethereum contract.
+type PoseidonHasherTransactor struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// PoseidonHasherFilterer is an auto generated log filtering Go binding around an Ethereum contract events.
+type PoseidonHasherFilterer struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// PoseidonHasherSession is an auto generated Go binding around an Ethereum contract,
+// with pre-set call and transact options.
+type PoseidonHasherSession struct {
+	Contract     *PoseidonHasher   // Generic contract binding to set the session for
+	CallOpts     bind.CallOpts     // Call options to use throughout this session
+	TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
+}
+
+// PoseidonHasherCallerSession is an auto generated read-only Go binding around an Ethereum contract,
+// with pre-set call options.
+type PoseidonHasherCallerSession struct {
+	Contract *PoseidonHasherCaller // Generic contract caller binding to set the session for
+	CallOpts bind.CallOpts         // Call options to use throughout this session
+}
+
+// PoseidonHasherTransactorSession is an auto generated write-only Go binding around an Ethereum contract,
+// with pre-set transact options.
+type PoseidonHasherTransactorSession struct {
+	Contract     *PoseidonHasherTransactor // Generic contract transactor binding to set the session for
+	TransactOpts bind.TransactOpts         // Transaction auth options to use throughout this session
+}
+
+// PoseidonHasherRaw is an auto generated low-level Go binding around an Ethereum contract.
+type PoseidonHasherRaw struct {
+	Contract *PoseidonHasher // Generic contract binding to access the raw methods on
+}
+
+// PoseidonHasherCallerRaw is an auto generated low-level read-only Go binding around an Ethereum contract.
+type PoseidonHasherCallerRaw struct {
+	Contract *PoseidonHasherCaller // Generic read-only contract binding to access the raw methods on
+}
+
+// PoseidonHasherTransactorRaw is an auto generated low-level write-only Go binding around an Ethereum contract.
+type PoseidonHasherTransactorRaw struct {
+	Contract *PoseidonHasherTransactor // Generic write-only contract binding to access the raw methods on
+}
+
+// NewPoseidonHasher creates a new instance of PoseidonHasher, bound to a specific deployed contract.
+func NewPoseidonHasher(address common.Address, backend bind.ContractBackend) (*PoseidonHasher, error) {
+	contract, err := bindPoseidonHasher(address, backend, backend, backend)
+	if err != nil {
+		return nil, err
+	}
+	return &PoseidonHasher{PoseidonHasherCaller: PoseidonHasherCaller{contract: contract}, PoseidonHasherTransactor: PoseidonHasherTransactor{contract: contract}, PoseidonHasherFilterer: PoseidonHasherFilterer{contract: contract}}, nil
+}
+
+// NewPoseidonHasherCaller creates a new read-only instance of PoseidonHasher, bound to a specific deployed contract.
+func NewPoseidonHasherCaller(address common.Address, caller bind.ContractCaller) (*PoseidonHasherCaller, error) {
+	contract, err := bindPoseidonHasher(address, caller, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &PoseidonHasherCaller{contract: contract}, nil
+}
+
+// NewPoseidonHasherTransactor creates a new write-only instance of PoseidonHasher, bound to a specific deployed contract.
+func NewPoseidonHasherTransactor(address common.Address, transactor bind.ContractTransactor) (*PoseidonHasherTransactor, error) {
+	contract, err := bindPoseidonHasher(address, nil, transactor, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &PoseidonHasherTransactor{contract: contract}, nil
+}
+
+// NewPoseidonHasherFilterer creates a new log filterer instance of PoseidonHasher, bound to a specific deployed contract.
+func NewPoseidonHasherFilterer(address common.Address, filterer bind.ContractFilterer) (*PoseidonHasherFilterer, error) {
+	contract, err := bindPoseidonHasher(address, nil, nil, filterer)
+	if err != nil {
+		return nil, err
+	}
+	return &PoseidonHasherFilterer{contract: contract}, nil
+}
+
+// bindPoseidonHasher binds a generic wrapper to an already deployed contract.
+func bindPoseidonHasher(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
+	parsed, err := abi.JSON(strings.NewReader(PoseidonHasherABI))
+	if err != nil {
+		return nil, err
+	}
+	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_PoseidonHasher *PoseidonHasherRaw) Call(opts *bind.CallOpts, result *[]interface{}, method string, params ...interface{}) error {
+	return _PoseidonHasher.Contract.PoseidonHasherCaller.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_PoseidonHasher *PoseidonHasherRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _PoseidonHasher.Contract.PoseidonHasherTransactor.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_PoseidonHasher *PoseidonHasherRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _PoseidonHasher.Contract.PoseidonHasherTransactor.contract.Transact(opts, method, params...)
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_PoseidonHasher *PoseidonHasherCallerRaw) Call(opts *bind.CallOpts, result *[]interface{}, method string, params ...interface{}) error {
+	return _PoseidonHasher.Contract.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_PoseidonHasher *PoseidonHasherTransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _PoseidonHasher.Contract.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_PoseidonHasher *PoseidonHasherTransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _PoseidonHasher.Contract.contract.Transact(opts, method, params...)
+}
+
+// Hash is a free data retrieval call binding the contract method 0x561558fe.
+//
+// Solidity: function hash(uint256[2] input) pure returns(uint256 result)
+func (_PoseidonHasher *PoseidonHasherCaller) Hash(opts *bind.CallOpts, input [2]*big.Int) (*big.Int, error) {
+	var out []interface{}
+	err := _PoseidonHasher.contract.Call(opts, &out, "hash", input)
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// Hash is a free data retrieval call binding the contract method 0x561558fe.
+//
+// Solidity: function hash(uint256[2] input) pure returns(uint256 result)
+func (_PoseidonHasher *PoseidonHasherSession) Hash(input [2]*big.Int) (*big.Int, error) {
+	return _PoseidonHasher.Contract.Hash(&_PoseidonHasher.CallOpts, input)
+}
+
+// Hash is a free data retrieval call binding the contract method 0x561558fe.
+//
+// Solidity: function hash(uint256[2] input) pure returns(uint256 result)
+func (_PoseidonHasher *PoseidonHasherCallerSession) Hash(input [2]*big.Int) (*big.Int, error) {
+	return _PoseidonHasher.Contract.Hash(&_PoseidonHasher.CallOpts, input)
+}
+
+// Identity is a free data retrieval call binding the contract method 0x2c159a1a.
+//
+// Solidity: function identity() pure returns(uint256)
+func (_PoseidonHasher *PoseidonHasherCaller) Identity(opts *bind.CallOpts) (*big.Int, error) {
+	var out []interface{}
+	err := _PoseidonHasher.contract.Call(opts, &out, "identity")
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// Identity is a free data retrieval call binding the contract method 0x2c159a1a.
+//
+// Solidity: function identity() pure returns(uint256)
+func (_PoseidonHasher *PoseidonHasherSession) Identity() (*big.Int, error) {
+	return _PoseidonHasher.Contract.Identity(&_PoseidonHasher.CallOpts)
+}
+
+// Identity is a free data retrieval call binding the contract method 0x2c159a1a.
+//
+// Solidity: function identity() pure returns(uint256)
+func (_PoseidonHasher *PoseidonHasherCallerSession) Identity() (*big.Int, error) {
+	return _PoseidonHasher.Contract.Identity(&_PoseidonHasher.CallOpts)
+}
+
+// RLNABI is the input ABI used to generate the binding from.
+const RLNABI = "[{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"membershipDeposit\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"depth\",\"type\":\"uint256\"},{\"internalType\":\"address\",\"name\":\"_poseidonHasher\",\"type\":\"address\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"pubkey\",\"type\":\"uint256\"},{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"index\",\"type\":\"uint256\"}],\"name\":\"MemberRegistered\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"pubkey\",\"type\":\"uint256\"},{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"index\",\"type\":\"uint256\"}],\"name\":\"MemberWithdrawn\",\"type\":\"event\"},{\"inputs\":[],\"name\":\"DEPTH\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"MEMBERSHIP_DEPOSIT\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"SET_SIZE\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"name\":\"members\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"poseidonHasher\",\"outputs\":[{\"internalType\":\"contractIPoseidonHasher\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"pubkeyIndex\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"pubkey\",\"type\":\"uint256\"}],\"name\":\"register\",\"outputs\":[],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256[]\",\"name\":\"pubkeys\",\"type\":\"uint256[]\"}],\"name\":\"registerBatch\",\"outputs\":[],\"stateMutability\":\"payable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"secret\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"_pubkeyIndex\",\"type\":\"uint256\"},{\"internalType\":\"addresspayable\",\"name\":\"receiver\",\"type\":\"address\"}],\"name\":\"withdraw\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256[]\",\"name\":\"secrets\",\"type\":\"uint256[]\"},{\"internalType\":\"uint256[]\",\"name\":\"pubkeyIndexes\",\"type\":\"uint256[]\"},{\"internalType\":\"addresspayable[]\",\"name\":\"receivers\",\"type\":\"address[]\"}],\"name\":\"withdrawBatch\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]"
+
+// RLNFuncSigs maps the 4-byte function signature to its string representation.
+var RLNFuncSigs = map[string]string{
+	"98366e35": "DEPTH()",
+	"f220b9ec": "MEMBERSHIP_DEPOSIT()",
+	"d0383d68": "SET_SIZE()",
+	"5daf08ca": "members(uint256)",
+	"331b6ab3": "poseidonHasher()",
+	"61579a93": "pubkeyIndex()",
+	"f207564e": "register(uint256)",
+	"69e4863f": "registerBatch(uint256[])",
+	"0ad58d2f": "withdraw(uint256,uint256,address)",
+	"a9d85eba": "withdrawBatch(uint256[],uint256[],address[])",
+}
+
+// RLNBin is the compiled bytecode used for deploying new contracts.
+var RLNBin = "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+
+// DeployRLN deploys a new Ethereum contract, binding an instance of RLN to it.
+func DeployRLN(auth *bind.TransactOpts, backend bind.ContractBackend, membershipDeposit *big.Int, depth *big.Int, _poseidonHasher common.Address) (common.Address, *types.Transaction, *RLN, error) {
+	parsed, err := abi.JSON(strings.NewReader(RLNABI))
+	if err != nil {
+		return common.Address{}, nil, nil, err
+	}
+
+	address, tx, contract, err := bind.DeployContract(auth, parsed, common.FromHex(RLNBin), backend, membershipDeposit, depth, _poseidonHasher)
+	if err != nil {
+		return common.Address{}, nil, nil, err
+	}
+	return address, tx, &RLN{RLNCaller: RLNCaller{contract: contract}, RLNTransactor: RLNTransactor{contract: contract}, RLNFilterer: RLNFilterer{contract: contract}}, nil
+}
+
+// RLN is an auto generated Go binding around an Ethereum contract.
+type RLN struct {
+	RLNCaller     // Read-only binding to the contract
+	RLNTransactor // Write-only binding to the contract
+	RLNFilterer   // Log filterer for contract events
+}
+
+// RLNCaller is an auto generated read-only Go binding around an Ethereum contract.
+type RLNCaller struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// RLNTransactor is an auto generated write-only Go binding around an Ethereum contract.
+type RLNTransactor struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// RLNFilterer is an auto generated log filtering Go binding around an Ethereum contract events.
+type RLNFilterer struct {
+	contract *bind.BoundContract // Generic contract wrapper for the low level calls
+}
+
+// RLNSession is an auto generated Go binding around an Ethereum contract,
+// with pre-set call and transact options.
+type RLNSession struct {
+	Contract     *RLN              // Generic contract binding to set the session for
+	CallOpts     bind.CallOpts     // Call options to use throughout this session
+	TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
+}
+
+// RLNCallerSession is an auto generated read-only Go binding around an Ethereum contract,
+// with pre-set call options.
+type RLNCallerSession struct {
+	Contract *RLNCaller    // Generic contract caller binding to set the session for
+	CallOpts bind.CallOpts // Call options to use throughout this session
+}
+
+// RLNTransactorSession is an auto generated write-only Go binding around an Ethereum contract,
+// with pre-set transact options.
+type RLNTransactorSession struct {
+	Contract     *RLNTransactor    // Generic contract transactor binding to set the session for
+	TransactOpts bind.TransactOpts // Transaction auth options to use throughout this session
+}
+
+// RLNRaw is an auto generated low-level Go binding around an Ethereum contract.
+type RLNRaw struct {
+	Contract *RLN // Generic contract binding to access the raw methods on
+}
+
+// RLNCallerRaw is an auto generated low-level read-only Go binding around an Ethereum contract.
+type RLNCallerRaw struct {
+	Contract *RLNCaller // Generic read-only contract binding to access the raw methods on
+}
+
+// RLNTransactorRaw is an auto generated low-level write-only Go binding around an Ethereum contract.
+type RLNTransactorRaw struct {
+	Contract *RLNTransactor // Generic write-only contract binding to access the raw methods on
+}
+
+// NewRLN creates a new instance of RLN, bound to a specific deployed contract.
+func NewRLN(address common.Address, backend bind.ContractBackend) (*RLN, error) {
+	contract, err := bindRLN(address, backend, backend, backend)
+	if err != nil {
+		return nil, err
+	}
+	return &RLN{RLNCaller: RLNCaller{contract: contract}, RLNTransactor: RLNTransactor{contract: contract}, RLNFilterer: RLNFilterer{contract: contract}}, nil
+}
+
+// NewRLNCaller creates a new read-only instance of RLN, bound to a specific deployed contract.
+func NewRLNCaller(address common.Address, caller bind.ContractCaller) (*RLNCaller, error) {
+	contract, err := bindRLN(address, caller, nil, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &RLNCaller{contract: contract}, nil
+}
+
+// NewRLNTransactor creates a new write-only instance of RLN, bound to a specific deployed contract.
+func NewRLNTransactor(address common.Address, transactor bind.ContractTransactor) (*RLNTransactor, error) {
+	contract, err := bindRLN(address, nil, transactor, nil)
+	if err != nil {
+		return nil, err
+	}
+	return &RLNTransactor{contract: contract}, nil
+}
+
+// NewRLNFilterer creates a new log filterer instance of RLN, bound to a specific deployed contract.
+func NewRLNFilterer(address common.Address, filterer bind.ContractFilterer) (*RLNFilterer, error) {
+	contract, err := bindRLN(address, nil, nil, filterer)
+	if err != nil {
+		return nil, err
+	}
+	return &RLNFilterer{contract: contract}, nil
+}
+
+// bindRLN binds a generic wrapper to an already deployed contract.
+func bindRLN(address common.Address, caller bind.ContractCaller, transactor bind.ContractTransactor, filterer bind.ContractFilterer) (*bind.BoundContract, error) {
+	parsed, err := abi.JSON(strings.NewReader(RLNABI))
+	if err != nil {
+		return nil, err
+	}
+	return bind.NewBoundContract(address, parsed, caller, transactor, filterer), nil
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_RLN *RLNRaw) Call(opts *bind.CallOpts, result *[]interface{}, method string, params ...interface{}) error {
+	return _RLN.Contract.RLNCaller.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_RLN *RLNRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _RLN.Contract.RLNTransactor.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_RLN *RLNRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _RLN.Contract.RLNTransactor.contract.Transact(opts, method, params...)
+}
+
+// Call invokes the (constant) contract method with params as input values and
+// sets the output to result. The result type might be a single field for simple
+// returns, a slice of interfaces for anonymous returns and a struct for named
+// returns.
+func (_RLN *RLNCallerRaw) Call(opts *bind.CallOpts, result *[]interface{}, method string, params ...interface{}) error {
+	return _RLN.Contract.contract.Call(opts, result, method, params...)
+}
+
+// Transfer initiates a plain transaction to move funds to the contract, calling
+// its default method if one is available.
+func (_RLN *RLNTransactorRaw) Transfer(opts *bind.TransactOpts) (*types.Transaction, error) {
+	return _RLN.Contract.contract.Transfer(opts)
+}
+
+// Transact invokes the (paid) contract method with params as input values.
+func (_RLN *RLNTransactorRaw) Transact(opts *bind.TransactOpts, method string, params ...interface{}) (*types.Transaction, error) {
+	return _RLN.Contract.contract.Transact(opts, method, params...)
+}
+
+// DEPTH is a free data retrieval call binding the contract method 0x98366e35.
+//
+// Solidity: function DEPTH() view returns(uint256)
+func (_RLN *RLNCaller) DEPTH(opts *bind.CallOpts) (*big.Int, error) {
+	var out []interface{}
+	err := _RLN.contract.Call(opts, &out, "DEPTH")
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// DEPTH is a free data retrieval call binding the contract method 0x98366e35.
+//
+// Solidity: function DEPTH() view returns(uint256)
+func (_RLN *RLNSession) DEPTH() (*big.Int, error) {
+	return _RLN.Contract.DEPTH(&_RLN.CallOpts)
+}
+
+// DEPTH is a free data retrieval call binding the contract method 0x98366e35.
+//
+// Solidity: function DEPTH() view returns(uint256)
+func (_RLN *RLNCallerSession) DEPTH() (*big.Int, error) {
+	return _RLN.Contract.DEPTH(&_RLN.CallOpts)
+}
+
+// MEMBERSHIPDEPOSIT is a free data retrieval call binding the contract method 0xf220b9ec.
+//
+// Solidity: function MEMBERSHIP_DEPOSIT() view returns(uint256)
+func (_RLN *RLNCaller) MEMBERSHIPDEPOSIT(opts *bind.CallOpts) (*big.Int, error) {
+	var out []interface{}
+	err := _RLN.contract.Call(opts, &out, "MEMBERSHIP_DEPOSIT")
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// MEMBERSHIPDEPOSIT is a free data retrieval call binding the contract method 0xf220b9ec.
+//
+// Solidity: function MEMBERSHIP_DEPOSIT() view returns(uint256)
+func (_RLN *RLNSession) MEMBERSHIPDEPOSIT() (*big.Int, error) {
+	return _RLN.Contract.MEMBERSHIPDEPOSIT(&_RLN.CallOpts)
+}
+
+// MEMBERSHIPDEPOSIT is a free data retrieval call binding the contract method 0xf220b9ec.
+//
+// Solidity: function MEMBERSHIP_DEPOSIT() view returns(uint256)
+func (_RLN *RLNCallerSession) MEMBERSHIPDEPOSIT() (*big.Int, error) {
+	return _RLN.Contract.MEMBERSHIPDEPOSIT(&_RLN.CallOpts)
+}
+
+// SETSIZE is a free data retrieval call binding the contract method 0xd0383d68.
+//
+// Solidity: function SET_SIZE() view returns(uint256)
+func (_RLN *RLNCaller) SETSIZE(opts *bind.CallOpts) (*big.Int, error) {
+	var out []interface{}
+	err := _RLN.contract.Call(opts, &out, "SET_SIZE")
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// SETSIZE is a free data retrieval call binding the contract method 0xd0383d68.
+//
+// Solidity: function SET_SIZE() view returns(uint256)
+func (_RLN *RLNSession) SETSIZE() (*big.Int, error) {
+	return _RLN.Contract.SETSIZE(&_RLN.CallOpts)
+}
+
+// SETSIZE is a free data retrieval call binding the contract method 0xd0383d68.
+//
+// Solidity: function SET_SIZE() view returns(uint256)
+func (_RLN *RLNCallerSession) SETSIZE() (*big.Int, error) {
+	return _RLN.Contract.SETSIZE(&_RLN.CallOpts)
+}
+
+// Members is a free data retrieval call binding the contract method 0x5daf08ca.
+//
+// Solidity: function members(uint256 ) view returns(uint256)
+func (_RLN *RLNCaller) Members(opts *bind.CallOpts, arg0 *big.Int) (*big.Int, error) {
+	var out []interface{}
+	err := _RLN.contract.Call(opts, &out, "members", arg0)
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// Members is a free data retrieval call binding the contract method 0x5daf08ca.
+//
+// Solidity: function members(uint256 ) view returns(uint256)
+func (_RLN *RLNSession) Members(arg0 *big.Int) (*big.Int, error) {
+	return _RLN.Contract.Members(&_RLN.CallOpts, arg0)
+}
+
+// Members is a free data retrieval call binding the contract method 0x5daf08ca.
+//
+// Solidity: function members(uint256 ) view returns(uint256)
+func (_RLN *RLNCallerSession) Members(arg0 *big.Int) (*big.Int, error) {
+	return _RLN.Contract.Members(&_RLN.CallOpts, arg0)
+}
+
+// PoseidonHasher is a free data retrieval call binding the contract method 0x331b6ab3.
+//
+// Solidity: function poseidonHasher() view returns(address)
+func (_RLN *RLNCaller) PoseidonHasher(opts *bind.CallOpts) (common.Address, error) {
+	var out []interface{}
+	err := _RLN.contract.Call(opts, &out, "poseidonHasher")
+
+	if err != nil {
+		return *new(common.Address), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(common.Address)).(*common.Address)
+
+	return out0, err
+
+}
+
+// PoseidonHasher is a free data retrieval call binding the contract method 0x331b6ab3.
+//
+// Solidity: function poseidonHasher() view returns(address)
+func (_RLN *RLNSession) PoseidonHasher() (common.Address, error) {
+	return _RLN.Contract.PoseidonHasher(&_RLN.CallOpts)
+}
+
+// PoseidonHasher is a free data retrieval call binding the contract method 0x331b6ab3.
+//
+// Solidity: function poseidonHasher() view returns(address)
+func (_RLN *RLNCallerSession) PoseidonHasher() (common.Address, error) {
+	return _RLN.Contract.PoseidonHasher(&_RLN.CallOpts)
+}
+
+// PubkeyIndex is a free data retrieval call binding the contract method 0x61579a93.
+//
+// Solidity: function pubkeyIndex() view returns(uint256)
+func (_RLN *RLNCaller) PubkeyIndex(opts *bind.CallOpts) (*big.Int, error) {
+	var out []interface{}
+	err := _RLN.contract.Call(opts, &out, "pubkeyIndex")
+
+	if err != nil {
+		return *new(*big.Int), err
+	}
+
+	out0 := *abi.ConvertType(out[0], new(*big.Int)).(**big.Int)
+
+	return out0, err
+
+}
+
+// PubkeyIndex is a free data retrieval call binding the contract method 0x61579a93.
+//
+// Solidity: function pubkeyIndex() view returns(uint256)
+func (_RLN *RLNSession) PubkeyIndex() (*big.Int, error) {
+	return _RLN.Contract.PubkeyIndex(&_RLN.CallOpts)
+}
+
+// PubkeyIndex is a free data retrieval call binding the contract method 0x61579a93.
+//
+// Solidity: function pubkeyIndex() view returns(uint256)
+func (_RLN *RLNCallerSession) PubkeyIndex() (*big.Int, error) {
+	return _RLN.Contract.PubkeyIndex(&_RLN.CallOpts)
+}
+
+// Register is a paid mutator transaction binding the contract method 0xf207564e.
+//
+// Solidity: function register(uint256 pubkey) payable returns()
+func (_RLN *RLNTransactor) Register(opts *bind.TransactOpts, pubkey *big.Int) (*types.Transaction, error) {
+	return _RLN.contract.Transact(opts, "register", pubkey)
+}
+
+// Register is a paid mutator transaction binding the contract method 0xf207564e.
+//
+// Solidity: function register(uint256 pubkey) payable returns()
+func (_RLN *RLNSession) Register(pubkey *big.Int) (*types.Transaction, error) {
+	return _RLN.Contract.Register(&_RLN.TransactOpts, pubkey)
+}
+
+// Register is a paid mutator transaction binding the contract method 0xf207564e.
+//
+// Solidity: function register(uint256 pubkey) payable returns()
+func (_RLN *RLNTransactorSession) Register(pubkey *big.Int) (*types.Transaction, error) {
+	return _RLN.Contract.Register(&_RLN.TransactOpts, pubkey)
+}
+
+// RegisterBatch is a paid mutator transaction binding the contract method 0x69e4863f.
+//
+// Solidity: function registerBatch(uint256[] pubkeys) payable returns()
+func (_RLN *RLNTransactor) RegisterBatch(opts *bind.TransactOpts, pubkeys []*big.Int) (*types.Transaction, error) {
+	return _RLN.contract.Transact(opts, "registerBatch", pubkeys)
+}
+
+// RegisterBatch is a paid mutator transaction binding the contract method 0x69e4863f.
+//
+// Solidity: function registerBatch(uint256[] pubkeys) payable returns()
+func (_RLN *RLNSession) RegisterBatch(pubkeys []*big.Int) (*types.Transaction, error) {
+	return _RLN.Contract.RegisterBatch(&_RLN.TransactOpts, pubkeys)
+}
+
+// RegisterBatch is a paid mutator transaction binding the contract method 0x69e4863f.
+//
+// Solidity: function registerBatch(uint256[] pubkeys) payable returns()
+func (_RLN *RLNTransactorSession) RegisterBatch(pubkeys []*big.Int) (*types.Transaction, error) {
+	return _RLN.Contract.RegisterBatch(&_RLN.TransactOpts, pubkeys)
+}
+
+// Withdraw is a paid mutator transaction binding the contract method 0x0ad58d2f.
+//
+// Solidity: function withdraw(uint256 secret, uint256 _pubkeyIndex, address receiver) returns()
+func (_RLN *RLNTransactor) Withdraw(opts *bind.TransactOpts, secret *big.Int, _pubkeyIndex *big.Int, receiver common.Address) (*types.Transaction, error) {
+	return _RLN.contract.Transact(opts, "withdraw", secret, _pubkeyIndex, receiver)
+}
+
+// Withdraw is a paid mutator transaction binding the contract method 0x0ad58d2f.
+//
+// Solidity: function withdraw(uint256 secret, uint256 _pubkeyIndex, address receiver) returns()
+func (_RLN *RLNSession) Withdraw(secret *big.Int, _pubkeyIndex *big.Int, receiver common.Address) (*types.Transaction, error) {
+	return _RLN.Contract.Withdraw(&_RLN.TransactOpts, secret, _pubkeyIndex, receiver)
+}
+
+// Withdraw is a paid mutator transaction binding the contract method 0x0ad58d2f.
+//
+// Solidity: function withdraw(uint256 secret, uint256 _pubkeyIndex, address receiver) returns()
+func (_RLN *RLNTransactorSession) Withdraw(secret *big.Int, _pubkeyIndex *big.Int, receiver common.Address) (*types.Transaction, error) {
+	return _RLN.Contract.Withdraw(&_RLN.TransactOpts, secret, _pubkeyIndex, receiver)
+}
+
+// WithdrawBatch is a paid mutator transaction binding the contract method 0xa9d85eba.
+//
+// Solidity: function withdrawBatch(uint256[] secrets, uint256[] pubkeyIndexes, address[] receivers) returns()
+func (_RLN *RLNTransactor) WithdrawBatch(opts *bind.TransactOpts, secrets []*big.Int, pubkeyIndexes []*big.Int, receivers []common.Address) (*types.Transaction, error) {
+	return _RLN.contract.Transact(opts, "withdrawBatch", secrets, pubkeyIndexes, receivers)
+}
+
+// WithdrawBatch is a paid mutator transaction binding the contract method 0xa9d85eba.
+//
+// Solidity: function withdrawBatch(uint256[] secrets, uint256[] pubkeyIndexes, address[] receivers) returns()
+func (_RLN *RLNSession) WithdrawBatch(secrets []*big.Int, pubkeyIndexes []*big.Int, receivers []common.Address) (*types.Transaction, error) {
+	return _RLN.Contract.WithdrawBatch(&_RLN.TransactOpts, secrets, pubkeyIndexes, receivers)
+}
+
+// WithdrawBatch is a paid mutator transaction binding the contract method 0xa9d85eba.
+//
+// Solidity: function withdrawBatch(uint256[] secrets, uint256[] pubkeyIndexes, address[] receivers) returns()
+func (_RLN *RLNTransactorSession) WithdrawBatch(secrets []*big.Int, pubkeyIndexes []*big.Int, receivers []common.Address) (*types.Transaction, error) {
+	return _RLN.Contract.WithdrawBatch(&_RLN.TransactOpts, secrets, pubkeyIndexes, receivers)
+}
+
+// RLNMemberRegisteredIterator is returned from FilterMemberRegistered and is used to iterate over the raw logs and unpacked data for MemberRegistered events raised by the RLN contract.
+type RLNMemberRegisteredIterator struct {
+	Event *RLNMemberRegistered // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *RLNMemberRegisteredIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(RLNMemberRegistered)
+			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+				it.fail = err
+				return false
+			}
+			it.Event.Raw = log
+			return true
+
+		default:
+			return false
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(RLNMemberRegistered)
+		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+			it.fail = err
+			return false
+		}
+		it.Event.Raw = log
+		return true
+
+	case err := <-it.sub.Err():
+		it.done = true
+		it.fail = err
+		return it.Next()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *RLNMemberRegisteredIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *RLNMemberRegisteredIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// RLNMemberRegistered represents a MemberRegistered event raised by the RLN contract.
+type RLNMemberRegistered struct {
+	Pubkey *big.Int
+	Index  *big.Int
+	Raw    types.Log // Blockchain specific contextual infos
+}
+
+// FilterMemberRegistered is a free log retrieval operation binding the contract event 0x5a92c2530f207992057b9c3e544108ffce3beda4a63719f316967c49bf6159d2.
+//
+// Solidity: event MemberRegistered(uint256 indexed pubkey, uint256 indexed index)
+func (_RLN *RLNFilterer) FilterMemberRegistered(opts *bind.FilterOpts, pubkey []*big.Int, index []*big.Int) (*RLNMemberRegisteredIterator, error) {
+
+	var pubkeyRule []interface{}
+	for _, pubkeyItem := range pubkey {
+		pubkeyRule = append(pubkeyRule, pubkeyItem)
+	}
+	var indexRule []interface{}
+	for _, indexItem := range index {
+		indexRule = append(indexRule, indexItem)
+	}
+
+	logs, sub, err := _RLN.contract.FilterLogs(opts, "MemberRegistered", pubkeyRule, indexRule)
+	if err != nil {
+		return nil, err
+	}
+	return &RLNMemberRegisteredIterator{contract: _RLN.contract, event: "MemberRegistered", logs: logs, sub: sub}, nil
+}
+
+// WatchMemberRegistered is a free log subscription operation binding the contract event 0x5a92c2530f207992057b9c3e544108ffce3beda4a63719f316967c49bf6159d2.
+//
+// Solidity: event MemberRegistered(uint256 indexed pubkey, uint256 indexed index)
+func (_RLN *RLNFilterer) WatchMemberRegistered(opts *bind.WatchOpts, sink chan<- *RLNMemberRegistered, pubkey []*big.Int, index []*big.Int) (event.Subscription, error) {
+
+	var pubkeyRule []interface{}
+	for _, pubkeyItem := range pubkey {
+		pubkeyRule = append(pubkeyRule, pubkeyItem)
+	}
+	var indexRule []interface{}
+	for _, indexItem := range index {
+		indexRule = append(indexRule, indexItem)
+	}
+
+	logs, sub, err := _RLN.contract.WatchLogs(opts, "MemberRegistered", pubkeyRule, indexRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(RLNMemberRegistered)
+				if err := _RLN.contract.UnpackLog(event, "MemberRegistered", log); err != nil {
+					return err
+				}
+				event.Raw = log
+
+				select {
+				case sink <- event:
+				case err := <-sub.Err():
+					return err
+				case <-quit:
+					return nil
+				}
+			case err := <-sub.Err():
+				return err
+			case <-quit:
+				return nil
+			}
+		}
+	}), nil
+}
+
+// ParseMemberRegistered is a log parse operation binding the contract event 0x5a92c2530f207992057b9c3e544108ffce3beda4a63719f316967c49bf6159d2.
+//
+// Solidity: event MemberRegistered(uint256 indexed pubkey, uint256 indexed index)
+func (_RLN *RLNFilterer) ParseMemberRegistered(log types.Log) (*RLNMemberRegistered, error) {
+	event := new(RLNMemberRegistered)
+	if err := _RLN.contract.UnpackLog(event, "MemberRegistered", log); err != nil {
+		return nil, err
+	}
+	event.Raw = log
+	return event, nil
+}
+
+// RLNMemberWithdrawnIterator is returned from FilterMemberWithdrawn and is used to iterate over the raw logs and unpacked data for MemberWithdrawn events raised by the RLN contract.
+type RLNMemberWithdrawnIterator struct {
+	Event *RLNMemberWithdrawn // Event containing the contract specifics and raw log
+
+	contract *bind.BoundContract // Generic contract to use for unpacking event data
+	event    string              // Event name to use for unpacking event data
+
+	logs chan types.Log        // Log channel receiving the found contract events
+	sub  ethereum.Subscription // Subscription for errors, completion and termination
+	done bool                  // Whether the subscription completed delivering logs
+	fail error                 // Occurred error to stop iteration
+}
+
+// Next advances the iterator to the subsequent event, returning whether there
+// are any more events found. In case of a retrieval or parsing error, false is
+// returned and Error() can be queried for the exact failure.
+func (it *RLNMemberWithdrawnIterator) Next() bool {
+	// If the iterator failed, stop iterating
+	if it.fail != nil {
+		return false
+	}
+	// If the iterator completed, deliver directly whatever's available
+	if it.done {
+		select {
+		case log := <-it.logs:
+			it.Event = new(RLNMemberWithdrawn)
+			if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+				it.fail = err
+				return false
+			}
+			it.Event.Raw = log
+			return true
+
+		default:
+			return false
+		}
+	}
+	// Iterator still in progress, wait for either a data or an error event
+	select {
+	case log := <-it.logs:
+		it.Event = new(RLNMemberWithdrawn)
+		if err := it.contract.UnpackLog(it.Event, it.event, log); err != nil {
+			it.fail = err
+			return false
+		}
+		it.Event.Raw = log
+		return true
+
+	case err := <-it.sub.Err():
+		it.done = true
+		it.fail = err
+		return it.Next()
+	}
+}
+
+// Error returns any retrieval or parsing error occurred during filtering.
+func (it *RLNMemberWithdrawnIterator) Error() error {
+	return it.fail
+}
+
+// Close terminates the iteration process, releasing any pending underlying
+// resources.
+func (it *RLNMemberWithdrawnIterator) Close() error {
+	it.sub.Unsubscribe()
+	return nil
+}
+
+// RLNMemberWithdrawn represents a MemberWithdrawn event raised by the RLN contract.
+type RLNMemberWithdrawn struct {
+	Pubkey *big.Int
+	Index  *big.Int
+	Raw    types.Log // Blockchain specific contextual infos
+}
+
+// FilterMemberWithdrawn is a free log retrieval operation binding the contract event 0x62ec3a516d22a993ce5cb4e7593e878c74f4d799dde522a88dc27a994fd5a943.
+//
+// Solidity: event MemberWithdrawn(uint256 indexed pubkey, uint256 indexed index)
+func (_RLN *RLNFilterer) FilterMemberWithdrawn(opts *bind.FilterOpts, pubkey []*big.Int, index []*big.Int) (*RLNMemberWithdrawnIterator, error) {
+
+	var pubkeyRule []interface{}
+	for _, pubkeyItem := range pubkey {
+		pubkeyRule = append(pubkeyRule, pubkeyItem)
+	}
+	var indexRule []interface{}
+	for _, indexItem := range index {
+		indexRule = append(indexRule, indexItem)
+	}
+
+	logs, sub, err := _RLN.contract.FilterLogs(opts, "MemberWithdrawn", pubkeyRule, indexRule)
+	if err != nil {
+		return nil, err
+	}
+	return &RLNMemberWithdrawnIterator{contract: _RLN.contract, event: "MemberWithdrawn", logs: logs, sub: sub}, nil
+}
+
+// WatchMemberWithdrawn is a free log subscription operation binding the contract event 0x62ec3a516d22a993ce5cb4e7593e878c74f4d799dde522a88dc27a994fd5a943.
+//
+// Solidity: event MemberWithdrawn(uint256 indexed pubkey, uint256 indexed index)
+func (_RLN *RLNFilterer) WatchMemberWithdrawn(opts *bind.WatchOpts, sink chan<- *RLNMemberWithdrawn, pubkey []*big.Int, index []*big.Int) (event.Subscription, error) {
+
+	var pubkeyRule []interface{}
+	for _, pubkeyItem := range pubkey {
+		pubkeyRule = append(pubkeyRule, pubkeyItem)
+	}
+	var indexRule []interface{}
+	for _, indexItem := range index {
+		indexRule = append(indexRule, indexItem)
+	}
+
+	logs, sub, err := _RLN.contract.WatchLogs(opts, "MemberWithdrawn", pubkeyRule, indexRule)
+	if err != nil {
+		return nil, err
+	}
+	return event.NewSubscription(func(quit <-chan struct{}) error {
+		defer sub.Unsubscribe()
+		for {
+			select {
+			case log := <-logs:
+				// New log arrived, parse the event and forward to the user
+				event := new(RLNMemberWithdrawn)
+				if err := _RLN.contract.UnpackLog(event, "MemberWithdrawn", log); err != nil {
+					return err
+				}
+				event.Raw = log
+
+				select {
+				case sink <- event:
+				case err := <-sub.Err():
+					return err
+				case <-quit:
+					return nil
+				}
+			case err := <-sub.Err():
+				return err
+			case <-quit:
+				return nil
+			}
+		}
+	}), nil
+}
+
+// ParseMemberWithdrawn is a log parse operation binding the contract event 0x62ec3a516d22a993ce5cb4e7593e878c74f4d799dde522a88dc27a994fd5a943.
+//
+// Solidity: event MemberWithdrawn(uint256 indexed pubkey, uint256 indexed index)
+func (_RLN *RLNFilterer) ParseMemberWithdrawn(log types.Log) (*RLNMemberWithdrawn, error) {
+	event := new(RLNMemberWithdrawn)
+	if err := _RLN.contract.UnpackLog(event, "MemberWithdrawn", log); err != nil {
+		return nil, err
+	}
+	event.Raw = log
+	return event, nil
+}
diff --git a/rln/contracts/RLN.sol b/rln/contracts/RLN.sol
new file mode 100644
index 0000000..1419d96
--- /dev/null
+++ b/rln/contracts/RLN.sol
@@ -0,0 +1,98 @@
+// https://github.com/kilic/rlnapp/blob/master/packages/contracts/contracts/RLN.sol
+
+pragma solidity 0.7.4;
+
+import { IPoseidonHasher } from "./crypto/PoseidonHasher.sol";
+
+contract RLN {
+	uint256 public immutable MEMBERSHIP_DEPOSIT;
+	uint256 public immutable DEPTH;
+	uint256 public immutable SET_SIZE;
+
+	uint256 public pubkeyIndex = 0;
+	mapping(uint256 => uint256) public members;
+
+	IPoseidonHasher public poseidonHasher;
+
+	event MemberRegistered(uint256 indexed pubkey, uint256 indexed index);
+	event MemberWithdrawn(uint256 indexed pubkey, uint256 indexed index);
+
+	constructor(
+		uint256 membershipDeposit,
+		uint256 depth,
+		address _poseidonHasher
+	) public {
+		MEMBERSHIP_DEPOSIT = membershipDeposit;
+		DEPTH = depth;
+		SET_SIZE = 1 << depth;
+		poseidonHasher = IPoseidonHasher(_poseidonHasher);
+	}
+
+	function register(uint256 pubkey) external payable {
+		require(pubkeyIndex < SET_SIZE, "RLN, register: set is full");
+		require(msg.value == MEMBERSHIP_DEPOSIT, "RLN, register: membership deposit is not satisfied");
+		_register(pubkey);
+	}
+
+	function registerBatch(uint256[] calldata pubkeys) external payable {
+		require(pubkeyIndex + pubkeys.length <= SET_SIZE, "RLN, registerBatch: set is full");
+		require(msg.value == MEMBERSHIP_DEPOSIT * pubkeys.length, "RLN, registerBatch: membership deposit is not satisfied");
+		for (uint256 i = 0; i < pubkeys.length; i++) {
+			_register(pubkeys[i]);
+		}
+	}
+
+	function _register(uint256 pubkey) internal {
+		members[pubkeyIndex] = pubkey;
+		emit MemberRegistered(pubkey, pubkeyIndex);
+		pubkeyIndex += 1;
+	}
+
+	function withdrawBatch(
+		uint256[] calldata secrets,
+		uint256[] calldata pubkeyIndexes,
+		address payable[] calldata receivers
+	) external {
+		uint256 batchSize = secrets.length;
+		require(batchSize != 0, "RLN, withdrawBatch: batch size zero");
+		require(batchSize == pubkeyIndexes.length, "RLN, withdrawBatch: batch size mismatch pubkey indexes");
+		require(batchSize == receivers.length, "RLN, withdrawBatch: batch size mismatch receivers");
+		for (uint256 i = 0; i < batchSize; i++) {
+			_withdraw(secrets[i], pubkeyIndexes[i], receivers[i]);
+		}
+	}
+
+	function withdraw(
+		uint256 secret,
+		uint256 _pubkeyIndex,
+		address payable receiver
+	) external {
+		_withdraw(secret, _pubkeyIndex, receiver);
+	}
+
+	function _withdraw(
+		uint256 secret,
+		uint256 _pubkeyIndex,
+		address payable receiver
+	) internal {
+		require(_pubkeyIndex < SET_SIZE, "RLN, _withdraw: invalid pubkey index");
+		require(members[_pubkeyIndex] != 0, "RLN, _withdraw: member doesn't exist");
+		require(receiver != address(0), "RLN, _withdraw: empty receiver address");
+
+		// derive public key
+		uint256 pubkey = hash([secret, 0]);
+		require(members[_pubkeyIndex] == pubkey, "RLN, _withdraw: not verified");
+
+		// delete member
+		members[_pubkeyIndex] = 0;
+
+		// refund deposit
+		receiver.transfer(MEMBERSHIP_DEPOSIT);
+
+		emit MemberWithdrawn(pubkey, _pubkeyIndex);
+	}
+
+	function hash(uint256[2] memory input) internal view returns (uint256) {
+		return poseidonHasher.hash(input);
+	}
+}
\ No newline at end of file
diff --git a/rln/contracts/crypto/PoseidonHasher.sol b/rln/contracts/crypto/PoseidonHasher.sol
new file mode 100644
index 0000000..c00bb8b
--- /dev/null
+++ b/rln/contracts/crypto/PoseidonHasher.sol
@@ -0,0 +1,535 @@
+// https://github.com/kilic/rlnapp/blob/master/packages/contracts/contracts/crypto/PoseidonHasher.sol
+
+pragma solidity 0.7.4;
+
+interface IPoseidonHasher {
+	function hash(uint256[2] memory input) external pure returns (uint256 result);
+
+	function identity() external pure returns (uint256);
+}
+
+contract PoseidonHasher is IPoseidonHasher {
+	uint256 constant Q = 21888242871839275222246405745257275088548364400416034343698204186575808495617;
+	uint256 constant C0 = 2768970367241139781802170833007148522174069744848643939234067191877771423371;
+	uint256 constant C1 = 6468574107656347268529237497718336587709069456280471580424455063721832719771;
+	uint256 constant C2 = 18794671303815708509784162368644133457448839260573151733485130900959816547847;
+	uint256 constant C3 = 21495479230478098685877232964279351350768322664786520160088149860043275231591;
+	uint256 constant C4 = 13499990804456294376331975175669076043666672782766959528979369127842395667962;
+	uint256 constant C5 = 11128727858753328237562379127901473551876426168355298792273038389175814738273;
+	uint256 constant C6 = 6174623859769212836350518599861056828848352474434521101649917228563284157731;
+	uint256 constant C7 = 731429061815452030222739129549549044853294286077603862495031070831228988506;
+	uint256 constant C8 = 18691825946094184197601861261718857711439992232978967087150603050561229972879;
+	uint256 constant C9 = 6901715409529528992021081413007214967207374659260807285380744444309443019002;
+	uint256 constant C10 = 7889774703159213060685393199720756541539275646424166159037924832893670779999;
+	uint256 constant C11 = 19148164181730036907570646123652401621475121269795476659255226436085540432812;
+	uint256 constant C12 = 356519004282890736138910009474234839367086357569508205089190200287135015343;
+	uint256 constant C13 = 5070064330380484074844995745007722918545766490350556589468108281662282971512;
+	uint256 constant C14 = 17531425645708334340342421865584088711059286683026910061769879104052748058500;
+	uint256 constant C15 = 920858801565935944623869688790191117976818337296182581403952541435643043455;
+	uint256 constant C16 = 7671542183617251806500810220803333911317855932989746628699368932279406768167;
+	uint256 constant C17 = 7881690674485945577862776772342991782415236259307258648854817257894786877801;
+	uint256 constant C18 = 19155896751615806549889067080381563929649717724892491357642801041215501837659;
+	uint256 constant C19 = 9657176770419678097838646349393281787292209556252142440714968703151552794280;
+	uint256 constant C20 = 1376534476338443314506167934949939673567644510933411653555577922098640496938;
+	uint256 constant C21 = 17373401671868429549652772677366856294616993437583002599910365256220696563780;
+	uint256 constant C22 = 9746128003951157537728271629364357225604237114762257721895149249266834505625;
+	uint256 constant C23 = 17782316906978487011972931426261039391542241330560756508577882755911543517908;
+	uint256 constant C24 = 6589224737393540076643416156354549730831080306137040791236143083907274321011;
+	uint256 constant C25 = 17321856211701727875100310423669922181823762220382619531116210312384063527081;
+	uint256 constant C26 = 21321909001724533038371153813693276559530291455431564073497502239396933319818;
+	uint256 constant C27 = 17849794853142289789836828064662594833303692772683927435966421769162340090898;
+	uint256 constant C28 = 3469446763321625523201767743510820386262850368964003752018684310306935672122;
+	uint256 constant C29 = 4411200946062535851397814394775457104021582693964231752948256822578636459939;
+	uint256 constant C30 = 18626579782117576204277882219675177684589838126472487652629778677837675278662;
+	uint256 constant C31 = 764261930639154699767774045099363658161006905585481283735008957581415860662;
+	uint256 constant C32 = 6122983345977564957406231576949193286198709429730716375547595362175192593123;
+	uint256 constant C33 = 2469188694307740124657403582315280809174737971010077914159812443136587941756;
+	uint256 constant C34 = 5382605971470296415808536561267917764719132018437742878552512928718168489695;
+	uint256 constant C35 = 6589667679759352998039311059993721585330589021804485020627575514256149305666;
+	uint256 constant C36 = 20661471625156349582050865201555079410137144327315643708284763422133754381325;
+	uint256 constant C37 = 18694584274137621868895160209707042629719656780873050479100267791928497600376;
+	uint256 constant C38 = 13822590562029956399621741895244911145933359734099212387467069390727913142666;
+	uint256 constant C39 = 694674849457359992382704784272941309716157308424480468618786287819256378917;
+	uint256 constant C40 = 18763037144982179742008371677750585549220053470184500098542470704194556690623;
+	uint256 constant C41 = 18486457976264107916834430437402981813449917200007719339429151501964183082936;
+	uint256 constant C42 = 6556747954001777118869362753998468478855885460502383141235961204400638463294;
+	uint256 constant C43 = 12385133754714463216711399717325449316164682530612784512290690756146937377664;
+	uint256 constant C44 = 19895348036861519723386861870711743699604138662509897355377030959682349375552;
+	uint256 constant C45 = 16830822151531046474312344756361243376821272897299262546129244900502111682734;
+	uint256 constant C46 = 20875209030695524214960780268667166557156788659940284813793529164900666593068;
+	uint256 constant C47 = 8777606742656153264634386709062440729894098167014885703560793183003141571957;
+	uint256 constant C48 = 3404497983786933300887052921900023151252717521554164668384012034556256626067;
+	uint256 constant C49 = 2555107629226010512992356367848094165962022522393505508367085820070687884355;
+	uint256 constant C50 = 15113919336730148565553505760820732613676431799289611544548947520407297443700;
+	uint256 constant C51 = 12109280671570307231007703707720632582709786369013364642897329602318304275337;
+	uint256 constant C52 = 14968914070423010632399365015358049892440762915276845426568596163422798377730;
+	uint256 constant C53 = 19061189532957010364709072574663003871548558794774753349573267371990486123152;
+	uint256 constant C54 = 8682801373989521576522508447484143687434748406228624907362693631377691698421;
+	uint256 constant C55 = 10836672514863795455996193088790111107823297731722043988991810099345596059914;
+	uint256 constant C56 = 15783196349960742821266383686606772431598902255698169764526487081837237805029;
+	uint256 constant C57 = 2908608383546665417899486637528022511748691900266764564499649456344035921401;
+	uint256 constant C58 = 11329727236614532496067886659074662970462346457991275919233250048151273297377;
+	uint256 constant C59 = 5116653167814666817290578004214535117470888177090558374943095066718387153691;
+	uint256 constant C60 = 13540152826778549413479417002435847356268346234631393477044136590757331815911;
+	uint256 constant C61 = 7947441526608065582264952807420254797193034288774248212171921641395121801332;
+	uint256 constant C62 = 1547483282147791156522335107475157206253201614573941966672490820147450725004;
+	uint256 constant M0 = 10115680371401748607263639966297231210785101245789087039760048681884121897698;
+	uint256 constant M1 = 7682529184580308813007726368887641784100790067958820768670102409394963579396;
+	uint256 constant M2 = 3036380094837744536618704667164758501777151816139077990926623931426168668495;
+	uint256 constant M3 = 462021688665431536448264191536285854244979957674130050775621906384644169421;
+	uint256 constant M4 = 62665112908715427992420108025470785827183241813778563254523765114425841603;
+	uint256 constant M5 = 534236519266104271325123542701236478972353175554309786393016883839422407419;
+	uint256 constant M6 = 5922526147398848214826466482573128257954044394758836008121691281747299315999;
+	uint256 constant M7 = 10778490508693548114587990025762035374898560218037495485187480124708600063292;
+	uint256 constant M8 = 13853145901042782779715203529626320031162484246107565810821674712070680357632;
+
+	function hash(uint256[2] memory input) external pure override returns (uint256 result) {
+		return _hash(input);
+	}
+
+	function _hash(uint256[2] memory input) internal pure returns (uint256 result) {
+		assembly {
+			let q := Q
+			let pos := mload(0x40)
+			mstore(pos, M0)
+			mstore(add(pos, 32), M1)
+			mstore(add(pos, 64), M2)
+			mstore(add(pos, 96), M3)
+			mstore(add(pos, 128), M4)
+
+			// mstore(add(pos, 160), M5)
+			// mstore(add(pos, 192), M6)
+			// mstore(add(pos, 224), M7)
+			// mstore(add(pos, 256), M8)
+
+			// use stack intensively
+			let m5 := M5
+			let m6 := M6
+			let m7 := M7
+			let m8 := M8
+
+			let s0 := add(mload(input), C0)
+			let s1 := add(mload(add(input, 32)), C0)
+			let s2 := C0
+
+			let t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := mulmod(s1, s1, q)
+			s1 := mulmod(mulmod(t, t, q), s1, q)
+			t := mulmod(s2, s2, q)
+			s2 := mulmod(mulmod(t, t, q), s2, q)
+			t := C1
+			let z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			let z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := mulmod(z1, z1, q)
+			z1 := mulmod(mulmod(t, t, q), z1, q)
+			t := mulmod(s2, s2, q)
+			s2 := mulmod(mulmod(t, t, q), s2, q)
+			t := C2
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := mulmod(s1, s1, q)
+			s1 := mulmod(mulmod(t, t, q), s1, q)
+			t := mulmod(s2, s2, q)
+			s2 := mulmod(mulmod(t, t, q), s2, q)
+			t := C3
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := mulmod(z1, z1, q)
+			z1 := mulmod(mulmod(t, t, q), z1, q)
+			t := mulmod(s2, s2, q)
+			s2 := mulmod(mulmod(t, t, q), s2, q)
+			t := C4
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C5
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C6
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C7
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C8
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C9
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C10
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C11
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C12
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C13
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C14
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C15
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C16
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C17
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C18
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C19
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C20
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C21
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C22
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C23
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C24
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C25
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C26
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C27
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C28
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C29
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C30
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C31
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C32
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C33
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C34
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C35
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C36
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C37
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C38
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C39
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C40
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C41
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C42
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C43
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C44
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C45
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C46
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C47
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C48
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C49
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C50
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C51
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C52
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C53
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C54
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C55
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C56
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C57
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := C58
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := C59
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := mulmod(z1, z1, q)
+			z1 := mulmod(mulmod(t, t, q), z1, q)
+			t := mulmod(s2, s2, q)
+			s2 := mulmod(mulmod(t, t, q), s2, q)
+			t := C60
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := mulmod(s1, s1, q)
+			s1 := mulmod(mulmod(t, t, q), s1, q)
+			t := mulmod(s2, s2, q)
+			s2 := mulmod(mulmod(t, t, q), s2, q)
+			t := C61
+			z0 := add(add(add(mulmod(s0, mload(pos), q), mulmod(s1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			z1 := add(add(add(mulmod(s0, mload(add(pos, 96)), q), mulmod(s1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(s0, m6, q), mulmod(s1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(z0, z0, q)
+			z0 := mulmod(mulmod(t, t, q), z0, q)
+			t := mulmod(z1, z1, q)
+			z1 := mulmod(mulmod(t, t, q), z1, q)
+			t := mulmod(s2, s2, q)
+			s2 := mulmod(mulmod(t, t, q), s2, q)
+			t := C62
+			s0 := add(add(add(mulmod(z0, mload(pos), q), mulmod(z1, mload(add(pos, 32)), q)), mulmod(s2, mload(add(pos, 64)), q)), t)
+			s1 := add(add(add(mulmod(z0, mload(add(pos, 96)), q), mulmod(z1, mload(add(pos, 128)), q)), mulmod(s2, m5, q)), t)
+			s2 := add(add(add(mulmod(z0, m6, q), mulmod(z1, m7, q)), mulmod(s2, m8, q)), t)
+			t := mulmod(s0, s0, q)
+			s0 := mulmod(mulmod(t, t, q), s0, q)
+			t := mulmod(s1, s1, q)
+			s1 := mulmod(mulmod(t, t, q), s1, q)
+			t := mulmod(s2, s2, q)
+			s2 := mulmod(mulmod(t, t, q), s2, q)
+
+			result := s0
+		}
+	}
+
+	function identity() external pure override returns (uint256) {
+		return _identity();
+	}
+
+	function _identity() internal pure returns (uint256) {
+		return 0x2ff267fd23782a5625e6d804f0a7fa700b8dc6084e2e7a5aff7cd4b1c506d30b;
+	}
+}
\ No newline at end of file
diff --git a/rln/contracts/generate.go b/rln/contracts/generate.go
new file mode 100644
index 0000000..0ae8bd4
--- /dev/null
+++ b/rln/contracts/generate.go
@@ -0,0 +1,3 @@
+package contracts
+
+//go:generate abigen -sol ./RLN.sol -pkg contracts -out ./RLN.go
diff --git a/rln/librln.h b/rln/librln.h
index 3d38d57..b2c117e 100644
--- a/rln/librln.h
+++ b/rln/librln.h
@@ -14,11 +14,6 @@ typedef struct Buffer {
   uintptr_t len;
 } Buffer;
 
-typedef struct Auth {
-  const struct Buffer *secret_buffer;
-  uintptr_t index;
-} Auth;
-
 bool new_circuit_from_params(uintptr_t merkle_depth,
                              const struct Buffer *parameters_buffer,
                              struct RLN_Bn256 **ctx);
@@ -31,14 +26,12 @@ bool delete_member(struct RLN_Bn256 *ctx, uintptr_t index);
 
 bool generate_proof(const struct RLN_Bn256 *ctx,
                     const struct Buffer *input_buffer,
-                    const struct Auth *auth,
                     struct Buffer *output_buffer);
 
-bool verify(const struct RLN_Bn256 *ctx, struct Buffer *proof_buffer, uint32_t *result_ptr);
+bool verify(const struct RLN_Bn256 *ctx, const struct Buffer *proof_buffer, uint32_t *result_ptr);
 
-bool hash(const struct RLN_Bn256 *ctx,
-          const struct Buffer *inputs_buffer,
-          uintptr_t input_len,
-          struct Buffer *output_buffer);
+bool signal_to_field(const struct RLN_Bn256 *ctx,
+                     const struct Buffer *inputs_buffer,
+                     struct Buffer *output_buffer);
 
-bool key_gen(const struct RLN_Bn256 *ctx, struct Buffer *keypair_buffer);
+bool key_gen(const struct RLN_Bn256 *ctx, struct Buffer *input_buffer);
diff --git a/rln/pb/generate.go b/rln/pb/generate.go
new file mode 100644
index 0000000..b0af357
--- /dev/null
+++ b/rln/pb/generate.go
@@ -0,0 +1,3 @@
+package pb
+
+//go:generate protoc -I. --gofast_out=. ./waku_message.proto
diff --git a/rln/pb/waku_message.pb.go b/rln/pb/waku_message.pb.go
new file mode 100644
index 0000000..a6a357e
--- /dev/null
+++ b/rln/pb/waku_message.pb.go
@@ -0,0 +1,969 @@
+// Code generated by protoc-gen-gogo. DO NOT EDIT.
+// source: waku_message.proto
+
+package pb
+
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	io "io"
+	math "math"
+	math_bits "math/bits"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+type RateLimitProof struct {
+	Proof                []byte   `protobuf:"bytes,1,opt,name=proof,proto3" json:"proof,omitempty"`
+	MerkleRoot           []byte   `protobuf:"bytes,2,opt,name=merkle_root,json=merkleRoot,proto3" json:"merkle_root,omitempty"`
+	Epoch                []byte   `protobuf:"bytes,3,opt,name=epoch,proto3" json:"epoch,omitempty"`
+	ShareX               []byte   `protobuf:"bytes,4,opt,name=share_x,json=shareX,proto3" json:"share_x,omitempty"`
+	ShareY               []byte   `protobuf:"bytes,5,opt,name=share_y,json=shareY,proto3" json:"share_y,omitempty"`
+	Nullifier            []byte   `protobuf:"bytes,6,opt,name=nullifier,proto3" json:"nullifier,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *RateLimitProof) Reset()         { *m = RateLimitProof{} }
+func (m *RateLimitProof) String() string { return proto.CompactTextString(m) }
+func (*RateLimitProof) ProtoMessage()    {}
+func (*RateLimitProof) Descriptor() ([]byte, []int) {
+	return fileDescriptor_6f0a20862b3bf714, []int{0}
+}
+func (m *RateLimitProof) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *RateLimitProof) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_RateLimitProof.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *RateLimitProof) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_RateLimitProof.Merge(m, src)
+}
+func (m *RateLimitProof) XXX_Size() int {
+	return m.Size()
+}
+func (m *RateLimitProof) XXX_DiscardUnknown() {
+	xxx_messageInfo_RateLimitProof.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_RateLimitProof proto.InternalMessageInfo
+
+func (m *RateLimitProof) GetProof() []byte {
+	if m != nil {
+		return m.Proof
+	}
+	return nil
+}
+
+func (m *RateLimitProof) GetMerkleRoot() []byte {
+	if m != nil {
+		return m.MerkleRoot
+	}
+	return nil
+}
+
+func (m *RateLimitProof) GetEpoch() []byte {
+	if m != nil {
+		return m.Epoch
+	}
+	return nil
+}
+
+func (m *RateLimitProof) GetShareX() []byte {
+	if m != nil {
+		return m.ShareX
+	}
+	return nil
+}
+
+func (m *RateLimitProof) GetShareY() []byte {
+	if m != nil {
+		return m.ShareY
+	}
+	return nil
+}
+
+func (m *RateLimitProof) GetNullifier() []byte {
+	if m != nil {
+		return m.Nullifier
+	}
+	return nil
+}
+
+type WakuMessage struct {
+	Payload              []byte          `protobuf:"bytes,1,opt,name=payload,proto3" json:"payload,omitempty"`
+	ContentTopic         string          `protobuf:"bytes,2,opt,name=contentTopic,proto3" json:"contentTopic,omitempty"`
+	Version              uint32          `protobuf:"varint,3,opt,name=version,proto3" json:"version,omitempty"`
+	Timestamp            int64           `protobuf:"zigzag64,10,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
+	RateLimitProof       *RateLimitProof `protobuf:"bytes,21,opt,name=rate_limit_proof,json=rateLimitProof,proto3" json:"rate_limit_proof,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}        `json:"-"`
+	XXX_unrecognized     []byte          `json:"-"`
+	XXX_sizecache        int32           `json:"-"`
+}
+
+func (m *WakuMessage) Reset()         { *m = WakuMessage{} }
+func (m *WakuMessage) String() string { return proto.CompactTextString(m) }
+func (*WakuMessage) ProtoMessage()    {}
+func (*WakuMessage) Descriptor() ([]byte, []int) {
+	return fileDescriptor_6f0a20862b3bf714, []int{1}
+}
+func (m *WakuMessage) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *WakuMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_WakuMessage.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *WakuMessage) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_WakuMessage.Merge(m, src)
+}
+func (m *WakuMessage) XXX_Size() int {
+	return m.Size()
+}
+func (m *WakuMessage) XXX_DiscardUnknown() {
+	xxx_messageInfo_WakuMessage.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_WakuMessage proto.InternalMessageInfo
+
+func (m *WakuMessage) GetPayload() []byte {
+	if m != nil {
+		return m.Payload
+	}
+	return nil
+}
+
+func (m *WakuMessage) GetContentTopic() string {
+	if m != nil {
+		return m.ContentTopic
+	}
+	return ""
+}
+
+func (m *WakuMessage) GetVersion() uint32 {
+	if m != nil {
+		return m.Version
+	}
+	return 0
+}
+
+func (m *WakuMessage) GetTimestamp() int64 {
+	if m != nil {
+		return m.Timestamp
+	}
+	return 0
+}
+
+func (m *WakuMessage) GetRateLimitProof() *RateLimitProof {
+	if m != nil {
+		return m.RateLimitProof
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterType((*RateLimitProof)(nil), "pb.RateLimitProof")
+	proto.RegisterType((*WakuMessage)(nil), "pb.WakuMessage")
+}
+
+func init() { proto.RegisterFile("waku_message.proto", fileDescriptor_6f0a20862b3bf714) }
+
+var fileDescriptor_6f0a20862b3bf714 = []byte{
+	// 299 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x54, 0x91, 0xbf, 0x4e, 0xf3, 0x30,
+	0x14, 0xc5, 0x3f, 0xf7, 0xa3, 0xad, 0x7a, 0x5b, 0xaa, 0xca, 0x02, 0xe1, 0x01, 0x85, 0xaa, 0x53,
+	0xa7, 0x0e, 0xb0, 0x32, 0x31, 0x83, 0x84, 0x2c, 0x24, 0x60, 0x8a, 0x9c, 0x70, 0x4b, 0xad, 0xfc,
+	0xb9, 0x96, 0xe3, 0x00, 0x7d, 0x13, 0x5e, 0x82, 0x87, 0x60, 0x63, 0xe4, 0x11, 0x50, 0x78, 0x11,
+	0x14, 0x87, 0x2a, 0x64, 0xf3, 0xef, 0x1c, 0x1d, 0xe9, 0xf8, 0x5c, 0xe0, 0xcf, 0x2a, 0x29, 0xc3,
+	0x0c, 0x8b, 0x42, 0x3d, 0xe2, 0xca, 0x58, 0x72, 0xc4, 0x7b, 0x26, 0x5a, 0xbc, 0x31, 0x98, 0x4a,
+	0xe5, 0xf0, 0x52, 0x67, 0xda, 0x5d, 0x5b, 0xa2, 0x35, 0x3f, 0x80, 0xbe, 0xa9, 0x1f, 0x82, 0xcd,
+	0xd9, 0x72, 0x22, 0x1b, 0xe0, 0x27, 0x30, 0xce, 0xd0, 0x26, 0x29, 0x86, 0x96, 0xc8, 0x89, 0x9e,
+	0xf7, 0xa0, 0x91, 0x24, 0x91, 0xab, 0x63, 0x68, 0x28, 0xde, 0x88, 0xff, 0x4d, 0xcc, 0x03, 0x3f,
+	0x82, 0x61, 0xb1, 0x51, 0x16, 0xc3, 0x17, 0xb1, 0xe7, 0xf5, 0x81, 0xc7, 0xbb, 0xd6, 0xd8, 0x8a,
+	0xfe, 0x1f, 0xe3, 0x9e, 0x1f, 0xc3, 0x28, 0x2f, 0xd3, 0x54, 0xaf, 0x35, 0x5a, 0x31, 0xf0, 0x56,
+	0x2b, 0x2c, 0xde, 0x19, 0x8c, 0x6f, 0x55, 0x52, 0x5e, 0x35, 0x3f, 0xe1, 0x02, 0x86, 0x46, 0x6d,
+	0x53, 0x52, 0x0f, 0xbf, 0x75, 0x77, 0xc8, 0x17, 0x30, 0x89, 0x29, 0x77, 0x98, 0xbb, 0x1b, 0x32,
+	0x3a, 0xf6, 0x8d, 0x47, 0xb2, 0xa3, 0xd5, 0xe9, 0x27, 0xb4, 0x85, 0xa6, 0xdc, 0xb7, 0xde, 0x97,
+	0x3b, 0xac, 0x5b, 0x38, 0x9d, 0x61, 0xe1, 0x54, 0x66, 0x04, 0xcc, 0xd9, 0x92, 0xcb, 0x56, 0xe0,
+	0xe7, 0x30, 0xb3, 0xca, 0x61, 0x98, 0xd6, 0xab, 0x85, 0xcd, 0x5a, 0x87, 0x73, 0xb6, 0x1c, 0x9f,
+	0xf2, 0x95, 0x89, 0x56, 0xdd, 0x41, 0xe5, 0xd4, 0x76, 0xf8, 0x62, 0xf6, 0x51, 0x05, 0xec, 0xb3,
+	0x0a, 0xd8, 0x57, 0x15, 0xb0, 0xd7, 0xef, 0xe0, 0x5f, 0x34, 0xf0, 0x07, 0x39, 0xfb, 0x09, 0x00,
+	0x00, 0xff, 0xff, 0x4a, 0x19, 0x2a, 0x86, 0xa6, 0x01, 0x00, 0x00,
+}
+
+func (m *RateLimitProof) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *RateLimitProof) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *RateLimitProof) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.XXX_unrecognized != nil {
+		i -= len(m.XXX_unrecognized)
+		copy(dAtA[i:], m.XXX_unrecognized)
+	}
+	if len(m.Nullifier) > 0 {
+		i -= len(m.Nullifier)
+		copy(dAtA[i:], m.Nullifier)
+		i = encodeVarintWakuMessage(dAtA, i, uint64(len(m.Nullifier)))
+		i--
+		dAtA[i] = 0x32
+	}
+	if len(m.ShareY) > 0 {
+		i -= len(m.ShareY)
+		copy(dAtA[i:], m.ShareY)
+		i = encodeVarintWakuMessage(dAtA, i, uint64(len(m.ShareY)))
+		i--
+		dAtA[i] = 0x2a
+	}
+	if len(m.ShareX) > 0 {
+		i -= len(m.ShareX)
+		copy(dAtA[i:], m.ShareX)
+		i = encodeVarintWakuMessage(dAtA, i, uint64(len(m.ShareX)))
+		i--
+		dAtA[i] = 0x22
+	}
+	if len(m.Epoch) > 0 {
+		i -= len(m.Epoch)
+		copy(dAtA[i:], m.Epoch)
+		i = encodeVarintWakuMessage(dAtA, i, uint64(len(m.Epoch)))
+		i--
+		dAtA[i] = 0x1a
+	}
+	if len(m.MerkleRoot) > 0 {
+		i -= len(m.MerkleRoot)
+		copy(dAtA[i:], m.MerkleRoot)
+		i = encodeVarintWakuMessage(dAtA, i, uint64(len(m.MerkleRoot)))
+		i--
+		dAtA[i] = 0x12
+	}
+	if len(m.Proof) > 0 {
+		i -= len(m.Proof)
+		copy(dAtA[i:], m.Proof)
+		i = encodeVarintWakuMessage(dAtA, i, uint64(len(m.Proof)))
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
+func (m *WakuMessage) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *WakuMessage) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *WakuMessage) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.XXX_unrecognized != nil {
+		i -= len(m.XXX_unrecognized)
+		copy(dAtA[i:], m.XXX_unrecognized)
+	}
+	if m.RateLimitProof != nil {
+		{
+			size, err := m.RateLimitProof.MarshalToSizedBuffer(dAtA[:i])
+			if err != nil {
+				return 0, err
+			}
+			i -= size
+			i = encodeVarintWakuMessage(dAtA, i, uint64(size))
+		}
+		i--
+		dAtA[i] = 0x1
+		i--
+		dAtA[i] = 0xaa
+	}
+	if m.Timestamp != 0 {
+		i = encodeVarintWakuMessage(dAtA, i, uint64((uint64(m.Timestamp)<<1)^uint64((m.Timestamp>>63))))
+		i--
+		dAtA[i] = 0x50
+	}
+	if m.Version != 0 {
+		i = encodeVarintWakuMessage(dAtA, i, uint64(m.Version))
+		i--
+		dAtA[i] = 0x18
+	}
+	if len(m.ContentTopic) > 0 {
+		i -= len(m.ContentTopic)
+		copy(dAtA[i:], m.ContentTopic)
+		i = encodeVarintWakuMessage(dAtA, i, uint64(len(m.ContentTopic)))
+		i--
+		dAtA[i] = 0x12
+	}
+	if len(m.Payload) > 0 {
+		i -= len(m.Payload)
+		copy(dAtA[i:], m.Payload)
+		i = encodeVarintWakuMessage(dAtA, i, uint64(len(m.Payload)))
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
+func encodeVarintWakuMessage(dAtA []byte, offset int, v uint64) int {
+	offset -= sovWakuMessage(v)
+	base := offset
+	for v >= 1<<7 {
+		dAtA[offset] = uint8(v&0x7f | 0x80)
+		v >>= 7
+		offset++
+	}
+	dAtA[offset] = uint8(v)
+	return base
+}
+func (m *RateLimitProof) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = len(m.Proof)
+	if l > 0 {
+		n += 1 + l + sovWakuMessage(uint64(l))
+	}
+	l = len(m.MerkleRoot)
+	if l > 0 {
+		n += 1 + l + sovWakuMessage(uint64(l))
+	}
+	l = len(m.Epoch)
+	if l > 0 {
+		n += 1 + l + sovWakuMessage(uint64(l))
+	}
+	l = len(m.ShareX)
+	if l > 0 {
+		n += 1 + l + sovWakuMessage(uint64(l))
+	}
+	l = len(m.ShareY)
+	if l > 0 {
+		n += 1 + l + sovWakuMessage(uint64(l))
+	}
+	l = len(m.Nullifier)
+	if l > 0 {
+		n += 1 + l + sovWakuMessage(uint64(l))
+	}
+	if m.XXX_unrecognized != nil {
+		n += len(m.XXX_unrecognized)
+	}
+	return n
+}
+
+func (m *WakuMessage) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = len(m.Payload)
+	if l > 0 {
+		n += 1 + l + sovWakuMessage(uint64(l))
+	}
+	l = len(m.ContentTopic)
+	if l > 0 {
+		n += 1 + l + sovWakuMessage(uint64(l))
+	}
+	if m.Version != 0 {
+		n += 1 + sovWakuMessage(uint64(m.Version))
+	}
+	if m.Timestamp != 0 {
+		n += 1 + sozWakuMessage(uint64(m.Timestamp))
+	}
+	if m.RateLimitProof != nil {
+		l = m.RateLimitProof.Size()
+		n += 2 + l + sovWakuMessage(uint64(l))
+	}
+	if m.XXX_unrecognized != nil {
+		n += len(m.XXX_unrecognized)
+	}
+	return n
+}
+
+func sovWakuMessage(x uint64) (n int) {
+	return (math_bits.Len64(x|1) + 6) / 7
+}
+func sozWakuMessage(x uint64) (n int) {
+	return sovWakuMessage(uint64((x << 1) ^ uint64((int64(x) >> 63))))
+}
+func (m *RateLimitProof) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowWakuMessage
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: RateLimitProof: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: RateLimitProof: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Proof", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowWakuMessage
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Proof = append(m.Proof[:0], dAtA[iNdEx:postIndex]...)
+			if m.Proof == nil {
+				m.Proof = []byte{}
+			}
+			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field MerkleRoot", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowWakuMessage
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.MerkleRoot = append(m.MerkleRoot[:0], dAtA[iNdEx:postIndex]...)
+			if m.MerkleRoot == nil {
+				m.MerkleRoot = []byte{}
+			}
+			iNdEx = postIndex
+		case 3:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Epoch", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowWakuMessage
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Epoch = append(m.Epoch[:0], dAtA[iNdEx:postIndex]...)
+			if m.Epoch == nil {
+				m.Epoch = []byte{}
+			}
+			iNdEx = postIndex
+		case 4:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field ShareX", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowWakuMessage
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.ShareX = append(m.ShareX[:0], dAtA[iNdEx:postIndex]...)
+			if m.ShareX == nil {
+				m.ShareX = []byte{}
+			}
+			iNdEx = postIndex
+		case 5:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field ShareY", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowWakuMessage
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.ShareY = append(m.ShareY[:0], dAtA[iNdEx:postIndex]...)
+			if m.ShareY == nil {
+				m.ShareY = []byte{}
+			}
+			iNdEx = postIndex
+		case 6:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Nullifier", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowWakuMessage
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Nullifier = append(m.Nullifier[:0], dAtA[iNdEx:postIndex]...)
+			if m.Nullifier == nil {
+				m.Nullifier = []byte{}
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipWakuMessage(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *WakuMessage) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowWakuMessage
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: WakuMessage: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: WakuMessage: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Payload", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowWakuMessage
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Payload = append(m.Payload[:0], dAtA[iNdEx:postIndex]...)
+			if m.Payload == nil {
+				m.Payload = []byte{}
+			}
+			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field ContentTopic", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowWakuMessage
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.ContentTopic = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 3:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Version", wireType)
+			}
+			m.Version = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowWakuMessage
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.Version |= uint32(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 10:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Timestamp", wireType)
+			}
+			var v uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowWakuMessage
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				v |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			v = (v >> 1) ^ uint64((int64(v&1)<<63)>>63)
+			m.Timestamp = int64(v)
+		case 21:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field RateLimitProof", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowWakuMessage
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			if m.RateLimitProof == nil {
+				m.RateLimitProof = &RateLimitProof{}
+			}
+			if err := m.RateLimitProof.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipWakuMessage(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthWakuMessage
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func skipWakuMessage(dAtA []byte) (n int, err error) {
+	l := len(dAtA)
+	iNdEx := 0
+	depth := 0
+	for iNdEx < l {
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return 0, ErrIntOverflowWakuMessage
+			}
+			if iNdEx >= l {
+				return 0, io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		wireType := int(wire & 0x7)
+		switch wireType {
+		case 0:
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflowWakuMessage
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				iNdEx++
+				if dAtA[iNdEx-1] < 0x80 {
+					break
+				}
+			}
+		case 1:
+			iNdEx += 8
+		case 2:
+			var length int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflowWakuMessage
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				length |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if length < 0 {
+				return 0, ErrInvalidLengthWakuMessage
+			}
+			iNdEx += length
+		case 3:
+			depth++
+		case 4:
+			if depth == 0 {
+				return 0, ErrUnexpectedEndOfGroupWakuMessage
+			}
+			depth--
+		case 5:
+			iNdEx += 4
+		default:
+			return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
+		}
+		if iNdEx < 0 {
+			return 0, ErrInvalidLengthWakuMessage
+		}
+		if depth == 0 {
+			return iNdEx, nil
+		}
+	}
+	return 0, io.ErrUnexpectedEOF
+}
+
+var (
+	ErrInvalidLengthWakuMessage        = fmt.Errorf("proto: negative length found during unmarshaling")
+	ErrIntOverflowWakuMessage          = fmt.Errorf("proto: integer overflow")
+	ErrUnexpectedEndOfGroupWakuMessage = fmt.Errorf("proto: unexpected end of group")
+)
diff --git a/rln/pb/waku_message.proto b/rln/pb/waku_message.proto
new file mode 100644
index 0000000..4cb13b7
--- /dev/null
+++ b/rln/pb/waku_message.proto
@@ -0,0 +1,20 @@
+syntax = "proto3";
+
+package pb;
+
+message RateLimitProof {
+  bytes proof = 1;
+  bytes merkle_root = 2;
+  bytes epoch = 3;
+  bytes share_x = 4;
+  bytes share_y = 5;
+  bytes nullifier = 6;
+}
+
+message WakuMessage {
+    bytes payload = 1;
+    string contentTopic = 2;
+    uint32 version = 3;
+    sint64 timestamp = 10;
+    RateLimitProof rate_limit_proof = 21;
+}
\ No newline at end of file
diff --git a/rln/rln.go b/rln/rln.go
index 3945039..e2841fa 100644
--- a/rln/rln.go
+++ b/rln/rln.go
@@ -5,10 +5,13 @@ package rln
 #include "./librln.h"
 */
 import "C"
-
 import (
+	"encoding/binary"
 	"errors"
+	"io/ioutil"
 	"unsafe"
+
+	"github.com/decanus/go-rln/rln/pb"
 )
 
 // RLN represents the context used for rln.
@@ -16,22 +19,35 @@ type RLN struct {
 	ptr *C.RLN_Bn256
 }
 
-// KeyPair generated by the GenerateKey function for RLN values.
-type KeyPair struct {
-	// Key represents the secret key.
-	Key [32]byte
-
-	// Commitment hash of the Key generated by a hash function in the rln lib.
-	Commitment [32]byte
+// New returns a new RLN generated using the default merkle tree depth
+func NewRLN() (*RLN, error) {
+	return NewRLNWithDepth(MERKLE_TREE_DEPTH)
 }
 
-// @TODO THINK ABOUT AUTH OBJECT
-
-// New returns a new RLN generated from the passed depth and parameters.
-func New(depth int, parameters []byte) (*RLN, error) {
+// NewRLNWithDepth generates an instance of RLN. An instance supports both zkSNARKs logics
+// and Merkle tree data structure and operations. The parameter `depth`` indicates the depth of Merkle tree
+func NewRLNWithDepth(depth int) (*RLN, error) {
 	r := &RLN{}
 
-	buf := toBuffer(parameters)
+	// parameters.key contains the prover and verifier keys
+	// to generate this file, clone this repo https://github.com/kilic/rln
+	// and run the following command in the root directory of the cloned project
+	// cargo run --example export_test_keys
+	// the file is generated separately and copied here
+	// parameters are function of tree depth and poseidon hasher
+	// to generate parameters for a different tree depth, change the tree size in the following line of rln library
+	// https://github.com/kilic/rln/blob/3bbec368a4adc68cd5f9bfae80b17e1bbb4ef373/examples/export_test_keys/main.rs#L4
+	// and then proceed as explained above
+	params, err := ioutil.ReadFile("./testdata/parameters.key")
+	if err != nil {
+		return nil, err
+	}
+
+	if len(params) == 0 {
+		return nil, errors.New("error in parameters.key")
+	}
+
+	buf := toBuffer(params)
 
 	size := int(unsafe.Sizeof(buf))
 	in := (*C.Buffer)(C.malloc(C.size_t(size)))
@@ -44,106 +60,39 @@ func New(depth int, parameters []byte) (*RLN, error) {
 	return r, nil
 }
 
-// GenerateKey generates a KeyPair for an RLN.
-func (r *RLN) GenerateKey() (*KeyPair, error) {
+// MembershipKeyGen generates a MembershipKeyPair that can be used for the registration into the rln membership contract
+func (r *RLN) MembershipKeyGen() (*MembershipKeyPair, error) {
 	buffer := toBuffer([]byte{})
 	if !bool(C.key_gen(r.ptr, &buffer)) {
-		return nil, errors.New("failed to genenrate key")
+		return nil, errors.New("error in key generation")
 	}
 
-	key := &KeyPair{
-		Key:        [32]byte{},
-		Commitment: [32]byte{},
+	key := &MembershipKeyPair{
+		IDKey:        [32]byte{},
+		IDCommitment: [32]byte{},
 	}
 
-	b := C.GoBytes(unsafe.Pointer(buffer.ptr), C.int(buffer.len))
+	// the public and secret keys together are 64 bytes
+	generatedKeys := C.GoBytes(unsafe.Pointer(buffer.ptr), C.int(buffer.len))
+	if len(generatedKeys) != 64 {
+		return nil, errors.New("the generated keys are invalid")
+	}
 
-	copy(key.Key[:], b[:32])
-	copy(key.Commitment[:], b[32:64])
+	copy(key.IDKey[:], generatedKeys[:32])
+	copy(key.IDCommitment[:], generatedKeys[32:64])
 
 	return key, nil
 }
 
-// Hash hashes a given input using the underlying function.
-func (r *RLN) Hash(input []byte) ([]byte, error) {
-
-	buf := toBuffer(input)
-	size := int(unsafe.Sizeof(buf))
-	in := (*C.Buffer)(C.malloc(C.size_t(size)))
-	*in = buf
-
-	var output []byte
-	out := toBuffer(output)
-
-	if !bool(C.hash(r.ptr, in, 1, &out)) {
-		return nil, errors.New("failed to hash")
-	}
-
-	return C.GoBytes(unsafe.Pointer(out.ptr), C.int(out.len)), nil
-}
-
-// GenerateProof generates a proof for the RLN given a KeyPair and the index in a merkle tree.
-func (r *RLN) GenerateProof(input []byte, key *KeyPair, index uint) ([]byte, error) {
-	inputBuf := toBuffer(input)
-
-	var output []byte
-	out := toBuffer(output)
-
-	keybuf := toBuffer(key.Key[:])
-	auth := &C.Auth{
-		secret_buffer: &keybuf,
-		index:         C.ulong(index),
-	}
-
-	if !bool(C.generate_proof(r.ptr, &inputBuf, auth, &out)) {
-		return nil, errors.New("failed to generate proof")
-	}
-
-	return C.GoBytes(unsafe.Pointer(out.ptr), C.int(out.len)), nil
-}
-
-// Verify verifies a proof generated for the RLN.
-func (r *RLN) Verify(proof []byte) bool {
-	proofBuf := toBuffer(proof)
-
-	result := uint32(0)
-	res := C.uint(result)
-	if !bool(C.verify(r.ptr, &proofBuf, &res)) {
-		// @TODO THINK ABOUT ERROR?
-		return false
-	}
-
-	return uint32(res) == 0
-}
-
-func (r *RLN) UpdateNextMember(input []byte) error {
-	buf := toBuffer(input)
-	if !bool(C.update_next_member(r.ptr, &buf)) {
-		return errors.New("failed to update next member")
-	}
-
-	return nil
-}
-
-func (r *RLN) DeleteMember(index int) error {
-	if !bool(C.delete_member(r.ptr, C.ulong(index))) {
-		return errors.New("failed to delete member")
-	}
-
-	return nil
-}
-
-func (r *RLN) GetRoot() ([]byte, error) {
-	var output []byte
-	out := toBuffer(output)
-
-	if !bool(C.get_root(r.ptr, &out)) {
-		return nil, errors.New("failed to get root")
-	}
-
-	return C.GoBytes(unsafe.Pointer(out.ptr), C.int(out.len)), nil
+// appendLength returns length prefixed version of the input with the following format
+// [len<8>|input<var>], the len is a 8 byte value serialized in little endian
+func appendLength(input []byte) []byte {
+	inputLen := make([]byte, 8)
+	binary.LittleEndian.PutUint64(inputLen, uint64(len(input)))
+	return append(inputLen, input...)
 }
 
+// toBuffer converts the input to a buffer object that is used to communicate data with the rln lib
 func toBuffer(data []byte) C.Buffer {
 	dataPtr, dataLen := sliceToPtr(data)
 	return C.Buffer{
@@ -159,3 +108,213 @@ func sliceToPtr(slice []byte) (*C.uchar, C.int) {
 		return (*C.uchar)(unsafe.Pointer(&slice[0])), C.int(len(slice))
 	}
 }
+
+// Hash hashes the plain text supplied in inputs_buffer and then maps it to a field element
+// this proc is used to map arbitrary signals to field element for the sake of proof generation
+// inputs holds the hash input as a byte slice, the output slice will contain a 32 byte slice
+func (r *RLN) Hash(data []byte) (MerkleNode, error) {
+	//  a thin layer on top of the Nim wrapper of the Poseidon hasher
+	lenPrefData := appendLength(data)
+
+	hashInputBuffer := toBuffer(lenPrefData)
+	size := int(unsafe.Sizeof(hashInputBuffer))
+	in := (*C.Buffer)(C.malloc(C.size_t(size)))
+	*in = hashInputBuffer
+
+	var output []byte
+	out := toBuffer(output)
+
+	if !bool(C.signal_to_field(r.ptr, in, &out)) {
+		return MerkleNode{}, errors.New("failed to hash")
+	}
+
+	b := C.GoBytes(unsafe.Pointer(out.ptr), C.int(out.len))
+
+	var result MerkleNode
+	copy(result[:], b)
+
+	return result, nil
+}
+
+// GenerateProof generates a proof for the RLN given a KeyPair and the index in a merkle tree.
+// The output will containt the proof data and should be parsed as |proof<256>|root<32>|epoch<32>|share_x<32>|share_y<32>|nullifier<32>|
+// integers wrapped in <> indicate value sizes in bytes
+func (r *RLN) GenerateProof(data []byte, key MembershipKeyPair, index MembershipIndex, epoch Epoch) (*RateLimitProof, error) {
+	input := serialize(key.IDKey, index, epoch, data)
+	inputBuf := toBuffer(input)
+	size := int(unsafe.Sizeof(inputBuf))
+	in := (*C.Buffer)(C.malloc(C.size_t(size)))
+	*in = inputBuf
+
+	var output []byte
+	out := toBuffer(output)
+
+	if !bool(C.generate_proof(r.ptr, in, &out)) {
+		return nil, errors.New("could not generate the proof")
+	}
+
+	proofBytes := C.GoBytes(unsafe.Pointer(out.ptr), C.int(out.len))
+
+	if len(proofBytes) != 416 {
+		return nil, errors.New("invalid proof generated")
+	}
+
+	// parse the proof as |zkSNARKs<256>|root<32>|epoch<32>|share_x<32>|share_y<32>|nullifier<32>|
+
+	proofOffset := 256
+	rootOffset := proofOffset + 32
+	epochOffset := rootOffset + 32
+	shareXOffset := epochOffset + 32
+	shareYOffset := shareXOffset + 32
+	nullifierOffset := shareYOffset + 32
+
+	var zkproof ZKSNARK
+	var proofRoot, shareX, shareY MerkleNode
+	var epochR Epoch
+	var nullifier Nullifier
+
+	copy(zkproof[:], proofBytes[0:proofOffset])
+	copy(proofRoot[:], proofBytes[proofOffset:rootOffset])
+	copy(epochR[:], proofBytes[rootOffset:epochOffset])
+	copy(shareX[:], proofBytes[epochOffset:shareXOffset])
+	copy(shareY[:], proofBytes[shareXOffset:shareYOffset])
+	copy(nullifier[:], proofBytes[shareYOffset:nullifierOffset])
+
+	return &RateLimitProof{
+		Proof:      zkproof,
+		MerkleRoot: proofRoot,
+		Epoch:      epochR,
+		ShareX:     shareX,
+		ShareY:     shareY,
+		Nullifier:  nullifier,
+	}, nil
+}
+
+// Verify verifies a proof generated for the RLN.
+// proof [ proof<256>| root<32>| epoch<32>| share_x<32>| share_y<32>| nullifier<32> | signal_len<8> | signal<var> ]
+func (r *RLN) Verify(data []byte, proof RateLimitProof) bool {
+	proofBytes := proof.serialize(data)
+	proofBuf := toBuffer(proofBytes)
+	size := int(unsafe.Sizeof(proofBuf))
+	in := (*C.Buffer)(C.malloc(C.size_t(size)))
+	*in = proofBuf
+
+	result := uint32(0)
+	res := C.uint(result)
+	if !bool(C.verify(r.ptr, in, &res)) {
+		return false
+	}
+
+	return uint32(res) == 0
+}
+
+// InsertMember adds the member to the tree
+func (r *RLN) InsertMember(idComm IDCommitment) bool {
+	buf := toBuffer(idComm[:])
+
+	size := int(unsafe.Sizeof(buf))
+	in := (*C.Buffer)(C.malloc(C.size_t(size)))
+	*in = buf
+
+	res := C.update_next_member(r.ptr, in)
+	return bool(res)
+}
+
+// DeleteMember removes an IDCommitment key from the tree. The index
+// parameter is the position of the id commitment key to be deleted from the tree.
+// The deleted id commitment key is replaced with a zero leaf
+func (r *RLN) DeleteMember(index MembershipIndex) bool {
+	deletionSuccess := bool(C.delete_member(r.ptr, C.ulong(index)))
+	return deletionSuccess
+}
+
+// GetMerkleRoot reads the Merkle Tree root after insertion
+func (r *RLN) GetMerkleRoot() (MerkleNode, error) {
+	var output []byte
+	out := toBuffer(output)
+
+	if !bool(C.get_root(r.ptr, &out)) {
+		return MerkleNode{}, errors.New("could not get the root")
+	}
+
+	b := C.GoBytes(unsafe.Pointer(out.ptr), C.int(out.len))
+
+	if len(b) != 32 {
+		return MerkleNode{}, errors.New("wrong output size")
+	}
+
+	var result MerkleNode
+	copy(result[:], b)
+
+	return result, nil
+}
+
+// AddAll adds members to the Merkle tree
+func (r *RLN) AddAll(list []IDCommitment) bool {
+	for _, member := range list {
+		if !r.InsertMember(member) {
+			return false
+		}
+	}
+	return true
+}
+
+func ToRLNSignal(wakuMessage *pb.WakuMessage) []byte {
+	if wakuMessage == nil {
+		return []byte{}
+	}
+
+	contentTopicBytes := []byte(wakuMessage.ContentTopic)
+	return append(wakuMessage.Payload, contentTopicBytes...)
+}
+
+// CalcMerkleRoot returns the root of the Merkle tree that is computed from the supplied list
+func CalcMerkleRoot(list []IDCommitment) (MerkleNode, error) {
+	rln, err := NewRLN()
+	if err != nil {
+		return MerkleNode{}, err
+	}
+
+	// create a Merkle tree
+	for _, c := range list {
+		if !rln.InsertMember(c) {
+			return MerkleNode{}, errors.New("could not add member")
+		}
+	}
+
+	return rln.GetMerkleRoot()
+}
+
+// CreateMembershipList produces a list of membership key pairs and also returns the root of a Merkle tree constructed
+// out of the identity commitment keys of the generated list. The output of this function is used to initialize a static
+// group keys (to test waku-rln-relay in the off-chain mode)
+func CreateMembershipList(n int) ([]MembershipKeyPair, MerkleNode, error) {
+	// initialize a Merkle tree
+	rln, err := NewRLN()
+	if err != nil {
+		return nil, MerkleNode{}, err
+	}
+
+	var output []MembershipKeyPair
+	for i := 0; i < n; i++ {
+		// generate a keypair
+		keypair, err := rln.MembershipKeyGen()
+		if err != nil {
+			return nil, MerkleNode{}, err
+		}
+
+		output = append(output, *keypair)
+
+		// insert the key to the Merkle tree
+		if !rln.InsertMember(keypair.IDCommitment) {
+			return nil, MerkleNode{}, errors.New("could not insert member")
+		}
+	}
+
+	root, err := rln.GetMerkleRoot()
+	if err != nil {
+		return nil, MerkleNode{}, err
+	}
+
+	return output, root, nil
+}
diff --git a/rln/rln_linux64.go b/rln/rln_linux64.go
index 4b1afcd..233e510 100644
--- a/rln/rln_linux64.go
+++ b/rln/rln_linux64.go
@@ -1,3 +1,4 @@
+//go:build !android && linux && amd64 && !musl
 // +build !android,linux,amd64,!musl
 
 package rln
diff --git a/rln/rln_test.go b/rln/rln_test.go
index 140fdc8..bc70e84 100644
--- a/rln/rln_test.go
+++ b/rln/rln_test.go
@@ -1,113 +1,255 @@
-package rln_test
+package rln
 
 import (
+	"bytes"
 	"encoding/hex"
-	"io/ioutil"
-	"reflect"
+	"math"
 	"testing"
 
-	"github.com/decanus/go-rln/rln"
+	"github.com/stretchr/testify/suite"
 )
 
-func TestNew(t *testing.T) {
-	params, err := ioutil.ReadFile("./testdata/parameters.key")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	_, err = rln.New(32, params)
-	if err != nil {
-		t.Fatal(err)
-	}
+func TestWakuRLNRelaySuite(t *testing.T) {
+	suite.Run(t, new(WakuRLNRelaySuite))
 }
 
-func TestGenerateKey(t *testing.T) {
-	params, err := ioutil.ReadFile("./testdata/parameters.key")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	r, err := rln.New(32, params)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	k, err := r.GenerateKey()
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if reflect.DeepEqual(k.Key, [32]byte{}) {
-		t.Fatal("k.Key was empty")
-	}
-
-	if reflect.DeepEqual(k.Commitment, [32]byte{}) {
-		t.Fatal("k.Commitment was empty")
-	}
+type WakuRLNRelaySuite struct {
+	suite.Suite
 }
 
-func TestRLN_Hash(t *testing.T) {
-	// This test is based on tests from:
-	// https://github.com/status-im/nim-waku/blob/b7998de09d1ef04599a699938da69aecfa63cc6f/tests/v2/test_waku_rln_relay.nim#L527
+func (s *WakuRLNRelaySuite) TestMembershipKeyGen() {
+	rln, err := NewRLNWithDepth(32)
+	s.NoError(err)
 
-	params, err := ioutil.ReadFile("./testdata/parameters.key")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	r, err := rln.New(32, params)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	input := byteArray(32, 1)
-
-	output, err := r.Hash(input)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	expected := "53a6338cdbf02f0563cec1898e354d0d272c8f98b606c538945c6f41ef101828"
-	if expected != hex.EncodeToString(output) {
-		t.Fatalf("value %x did not match expected %s", output, expected)
-	}
+	key, err := rln.MembershipKeyGen()
+	s.NoError(err)
+	s.Len(key.IDKey, 32)
+	s.Len(key.IDCommitment, 32)
+	s.NotEmpty(key.IDKey)
+	s.NotEmpty(key.IDCommitment)
+	s.False(bytes.Equal(key.IDCommitment[:], make([]byte, 32)))
+	s.False(bytes.Equal(key.IDKey[:], make([]byte, 32)))
 }
 
-func TestRLN_GetRoot(t *testing.T) {
-	// This test is based on tests from:
-	// https://github.com/status-im/nim-waku/blob/b7998de09d1ef04599a699938da69aecfa63cc6f/tests/v2/test_waku_rln_relay.nim#L320
+func (s *WakuRLNRelaySuite) TestGetMerkleRoot() {
+	rln, err := NewRLNWithDepth(32)
+	s.NoError(err)
 
-	params, err := ioutil.ReadFile("./testdata/parameters.key")
-	if err != nil {
-		t.Fatal(err)
-	}
+	root1, err := rln.GetMerkleRoot()
+	s.NoError(err)
+	s.Len(root1, 32)
 
-	r, err := rln.New(32, params)
-	if err != nil {
-		t.Fatal(err)
-	}
+	root2, err := rln.GetMerkleRoot()
+	s.NoError(err)
+	s.Len(root2, 32)
 
-	root1, err := r.GetRoot()
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	root2, err := r.GetRoot()
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if hex.EncodeToString(root1) != hex.EncodeToString(root2) {
-		t.Fatalf("value %x did not match expected %x", root1, root2)
-	}
+	s.Equal(root1, root2)
 }
 
-func byteArray(length int, value byte) []byte {
-	arr := make([]byte, length)
+func (s *WakuRLNRelaySuite) TestInsertMember() {
+	rln, err := NewRLNWithDepth(32)
+	s.NoError(err)
 
-	for i := 0; i < length; i++ {
-		arr[i] = value
+	keypair, err := rln.MembershipKeyGen()
+	s.NoError(err)
+
+	inserted := rln.InsertMember(keypair.IDCommitment)
+	s.True(inserted)
+}
+
+func (s *WakuRLNRelaySuite) TestRemoveMember() {
+	rln, err := NewRLNWithDepth(32)
+	s.NoError(err)
+
+	deleted := rln.DeleteMember(MembershipIndex(0))
+	s.True(deleted)
+}
+
+func (s *WakuRLNRelaySuite) TestMerkleTreeConsistenceBetweenDeletionAndInsertion() {
+	rln, err := NewRLNWithDepth(32)
+	s.NoError(err)
+
+	root1, err := rln.GetMerkleRoot()
+	s.NoError(err)
+	s.Len(root1, 32)
+
+	keypair, err := rln.MembershipKeyGen()
+	s.NoError(err)
+
+	inserted := rln.InsertMember(keypair.IDCommitment)
+	s.True(inserted)
+
+	// read the Merkle Tree root after insertion
+	root2, err := rln.GetMerkleRoot()
+	s.NoError(err)
+	s.Len(root2, 32)
+
+	// delete the first member
+	deleted_member_index := MembershipIndex(0)
+	deleted := rln.DeleteMember(deleted_member_index)
+	s.True(deleted)
+
+	// read the Merkle Tree root after the deletion
+	root3, err := rln.GetMerkleRoot()
+	s.NoError(err)
+	s.Len(root3, 32)
+
+	// the root must change after the insertion
+	s.NotEqual(root1, root2)
+
+	// The initial root of the tree (empty tree) must be identical to
+	// the root of the tree after one insertion followed by a deletion
+	s.Equal(root1, root3)
+}
+
+func (s *WakuRLNRelaySuite) TestHash() {
+	rln, err := NewRLNWithDepth(32)
+	s.NoError(err)
+
+	// prepare the input
+	msg := []byte("Hello")
+
+	hash, err := rln.Hash(msg)
+	s.NoError(err)
+
+	expectedHash, _ := hex.DecodeString("efb8ac39dc22eaf377fe85b405b99ba78dbc2f3f32494add4501741df946bd1d")
+	s.Equal(expectedHash, hash[:])
+}
+
+func (s *WakuRLNRelaySuite) TestCreateListMembershipKeysAndCreateMerkleTreeFromList() {
+	groupSize := 100
+	list, root, err := CreateMembershipList(groupSize)
+	s.NoError(err)
+	s.Len(list, groupSize)
+	s.Len(root, HASH_HEX_SIZE) // check the size of the calculated tree root
+}
+
+func (s *WakuRLNRelaySuite) TestCheckCorrectness() {
+	groupKeys := STATIC_GROUP_KEYS
+
+	// create a set of MembershipKeyPair objects from groupKeys
+	groupKeyPairs, err := toMembershipKeyPairs(groupKeys)
+	s.NoError(err)
+
+	// extract the id commitments
+	var groupIDCommitments []IDCommitment
+	for _, c := range groupKeyPairs {
+		groupIDCommitments = append(groupIDCommitments, c.IDCommitment)
 	}
 
-	return arr
+	// calculate the Merkle tree root out of the extracted id commitments
+	root, err := CalcMerkleRoot(groupIDCommitments)
+	s.NoError(err)
+
+	expectedRoot, _ := hex.DecodeString(STATIC_GROUP_MERKLE_ROOT)
+
+	s.Len(groupKeyPairs, STATIC_GROUP_SIZE)
+	s.Equal(expectedRoot, root[:])
+}
+
+func (s *WakuRLNRelaySuite) TestValidProof() {
+	rln, err := NewRLN()
+	s.NoError(err)
+
+	memKeys, err := rln.MembershipKeyGen()
+	s.NoError(err)
+
+	//peer's index in the Merkle Tree
+	index := 5
+
+	// Create a Merkle tree with random members
+	for i := 0; i < 10; i++ {
+		memberIsAdded := false
+		if i == index {
+			// insert the current peer's pk
+			memberIsAdded = rln.InsertMember(memKeys.IDCommitment)
+		} else {
+			// create a new key pair
+			memberKeys, err := rln.MembershipKeyGen()
+			s.NoError(err)
+
+			memberIsAdded = rln.InsertMember(memberKeys.IDCommitment)
+		}
+		s.True(memberIsAdded)
+	}
+
+	// prepare the message
+	msg := []byte("Hello")
+
+	// prepare the epoch
+	var epoch Epoch
+
+	// generate proof
+	proofRes, err := rln.GenerateProof(msg, *memKeys, MembershipIndex(index), epoch)
+	s.NoError(err)
+
+	// verify the proof
+	verified := rln.Verify(msg, *proofRes)
+
+	s.True(verified)
+}
+
+func (s *WakuRLNRelaySuite) TestInvalidProof() {
+	rln, err := NewRLN()
+	s.NoError(err)
+
+	memKeys, err := rln.MembershipKeyGen()
+	s.NoError(err)
+
+	//peer's index in the Merkle Tree
+	index := 5
+
+	// Create a Merkle tree with random members
+	for i := 0; i < 10; i++ {
+		memberIsAdded := false
+		if i == index {
+			// insert the current peer's pk
+			memberIsAdded = rln.InsertMember(memKeys.IDCommitment)
+		} else {
+			// create a new key pair
+			memberKeys, err := rln.MembershipKeyGen()
+			s.NoError(err)
+
+			memberIsAdded = rln.InsertMember(memberKeys.IDCommitment)
+		}
+		s.True(memberIsAdded)
+	}
+
+	// prepare the message
+	msg := []byte("Hello")
+
+	// prepare the epoch
+	var epoch Epoch
+
+	badIndex := 4
+
+	// generate proof
+	proofRes, err := rln.GenerateProof(msg, *memKeys, MembershipIndex(badIndex), epoch)
+	s.NoError(err)
+
+	// verify the proof (should not be verified)
+	verified := rln.Verify(msg, *proofRes)
+
+	s.False(verified)
+}
+
+func (s *WakuRLNRelaySuite) TestEpochConsistency() {
+	// check edge cases
+	var epoch uint64 = math.MaxUint64
+	epochBytes := ToEpoch(epoch)
+	decodedEpoch := epochBytes.Uint64()
+
+	s.Equal(epoch, decodedEpoch)
+}
+
+func (s *WakuRLNRelaySuite) TestEpochComparison() {
+	// check edge cases
+	var time1 uint64 = math.MaxUint64
+	var time2 uint64 = math.MaxUint64 - 1
+
+	epoch1 := ToEpoch(time1)
+	epoch2 := ToEpoch(time2)
+
+	s.Equal(int64(1), Diff(epoch1, epoch2))
+	s.Equal(int64(-1), Diff(epoch2, epoch1))
 }
diff --git a/rln/serialize.go b/rln/serialize.go
new file mode 100644
index 0000000..94000d5
--- /dev/null
+++ b/rln/serialize.go
@@ -0,0 +1,38 @@
+package rln
+
+import "encoding/binary"
+
+// serialize converts a RateLimitProof and the data to a byte seq
+// this conversion is used in the proofGen function
+// the serialization is done as instructed in  https://github.com/kilic/rln/blob/7ac74183f8b69b399e3bc96c1ae8ab61c026dc43/src/public.rs#L146
+// [ id_key<32> | id_index<8> | epoch<32> | signal_len<8> | signal<var> ]
+func serialize(idKey IDKey, memIndex MembershipIndex, epoch Epoch, msg []byte) []byte {
+
+	memIndexBytes := make([]byte, 8)
+	binary.LittleEndian.PutUint64(memIndexBytes, uint64(memIndex))
+
+	lenPrefMsg := appendLength(msg)
+
+	output := append(idKey[:], memIndexBytes...)
+	output = append(output, epoch[:]...)
+	output = append(output, lenPrefMsg...)
+
+	return output
+}
+
+// serialize converts a RateLimitProof and data to a byte seq
+// this conversion is used in the proof verification proc
+// the order of serialization is based on https://github.com/kilic/rln/blob/7ac74183f8b69b399e3bc96c1ae8ab61c026dc43/src/public.rs#L205
+// [ proof<256>| root<32>| epoch<32>| share_x<32>| share_y<32>| nullifier<32> | signal_len<8> | signal<var> ]
+func (r RateLimitProof) serialize(data []byte) []byte {
+
+	lenPrefMsg := appendLength(data)
+	proofBytes := append(r.Proof[:], r.MerkleRoot[:]...)
+	proofBytes = append(proofBytes, r.Epoch[:]...)
+	proofBytes = append(proofBytes, r.ShareX[:]...)
+	proofBytes = append(proofBytes, r.ShareY[:]...)
+	proofBytes = append(proofBytes, r.Nullifier[:]...)
+	proofBytes = append(proofBytes, lenPrefMsg...)
+
+	return proofBytes
+}
diff --git a/rln/testdata/parameters.key b/rln/testdata/parameters.key
index 8691479..9829416 100644
Binary files a/rln/testdata/parameters.key and b/rln/testdata/parameters.key differ
diff --git a/rln/types.go b/rln/types.go
new file mode 100644
index 0000000..86e9b4b
--- /dev/null
+++ b/rln/types.go
@@ -0,0 +1,279 @@
+package rln
+
+import (
+	"bytes"
+	"encoding/binary"
+	"time"
+
+	"github.com/decanus/go-rln/rln/pb"
+)
+
+// IDKey is an identity key as defined in https://hackmd.io/tMTLMYmTR5eynw2lwK9n1w?view#Membership
+type IDKey [32]byte
+
+// IDCommintment is hash of identity key as defined in https://hackmd.io/tMTLMYmTR5eynw2lwK9n1w?view#Membership
+type IDCommitment [32]byte
+
+// Each node of the Merkle tee is a Poseidon hash which is a 32 byte value
+type MerkleNode [32]byte
+
+type Nullifier [32]byte
+
+type ZKSNARK [256]byte
+
+// Custom data types defined for waku rln relay -------------------------
+
+type MembershipKeyPair struct {
+	// user's identity key (a secret key) which is selected randomly
+	// see details in https://hackmd.io/tMTLMYmTR5eynw2lwK9n1w?view#Membership
+	IDKey IDKey
+	// hash of user's identity key generated by
+	// Poseidon hash function implemented in rln lib
+	// more details in https://hackmd.io/tMTLMYmTR5eynw2lwK9n1w?view#Membership
+	IDCommitment IDCommitment
+}
+
+type RateLimitProof struct {
+	// RateLimitProof holds the public inputs to rln circuit as
+	// defined in https://hackmd.io/tMTLMYmTR5eynw2lwK9n1w?view#Public-Inputs
+	// the `proof` field carries the actual zkSNARK proof
+	Proof ZKSNARK
+	// the root of Merkle tree used for the generation of the `proof`
+	MerkleRoot MerkleNode
+	// the epoch used for the generation of the `proof`
+	Epoch Epoch
+	// shareX and shareY are shares of user's identity key
+	// these shares are created using Shamir secret sharing scheme
+	// see details in https://hackmd.io/tMTLMYmTR5eynw2lwK9n1w?view#Linear-Equation-amp-SSS
+	ShareX MerkleNode
+	ShareY MerkleNode
+	// nullifier enables linking two messages published during the same epoch
+	// see details in https://hackmd.io/tMTLMYmTR5eynw2lwK9n1w?view#Nullifiers
+	Nullifier Nullifier
+}
+
+func ToRateLimitProof(msg *pb.WakuMessage) *RateLimitProof {
+	if msg == nil {
+		return nil
+	}
+
+	result := &RateLimitProof{
+		Proof:      ZKSNARK(Bytes256(msg.RateLimitProof.Proof)),
+		MerkleRoot: MerkleNode(Bytes32(msg.RateLimitProof.MerkleRoot)),
+		Epoch:      Epoch(Bytes32(msg.RateLimitProof.Epoch)),
+		ShareX:     MerkleNode(Bytes32(msg.RateLimitProof.ShareX)),
+		ShareY:     MerkleNode(Bytes32(msg.RateLimitProof.ShareY)),
+		Nullifier:  Nullifier(Bytes32(msg.RateLimitProof.Nullifier)),
+	}
+
+	return result
+}
+
+type MembershipIndex uint
+
+type ProofMetadata struct {
+	Nullifier Nullifier
+	ShareX    MerkleNode
+	ShareY    MerkleNode
+}
+
+func (p ProofMetadata) Equals(p2 ProofMetadata) bool {
+	return bytes.Equal(p.Nullifier[:], p2.Nullifier[:]) && bytes.Equal(p.ShareX[:], p2.ShareX[:]) && bytes.Equal(p.ShareY[:], p2.ShareY[:])
+}
+
+type MessageValidationResult int
+
+const (
+	MessageValidationResult_Unknown MessageValidationResult = iota
+	MessageValidationResult_Valid
+	MessageValidationResult_Invalid
+	MessageValidationResult_Spam
+)
+
+/*
+# inputs of the membership contract constructor
+# TODO may be able to make these constants private and put them inside the waku_rln_relay_utils
+const
+  MEMBERSHIP_FEE* = 5.u256
+*/
+
+//  the current implementation of the rln lib only supports a circuit for Merkle tree with depth 32
+const MERKLE_TREE_DEPTH int = 20
+
+// TODO the ETH_CLIENT should be an input to the rln-relay, though hardcoded for now
+// the current address is the address of ganache-cli when run locally
+const ETH_CLIENT = "ws://localhost:8540/"
+
+// HASH_BIT_SIZE is the size of poseidon hash output in bits
+const HASH_BIT_SIZE = 256
+
+// HASH_HEX_SIZE is the size of poseidon hash output as the number of bytes
+const HASH_HEX_SIZE = int(HASH_BIT_SIZE / 8)
+
+// temporary variables to test waku-rln-relay performance in the static group mode
+
+const STATIC_GROUP_SIZE = 100
+
+// STATIC_GROUP_KEYS is a static list of 100 membership keys in the form of (identity key, identity commitment)
+//  keys are created locally, using createMembershipList proc from waku_rln_relay_utils module, and the results are hardcoded in here
+//  this list is temporary and is created to test the performance of waku-rln-relay for the static groups
+//  in the later versions, this static hardcoded group will be replaced with a dynamic one
+var STATIC_GROUP_KEYS [][]string
+
+func init() {
+	STATIC_GROUP_KEYS = [][]string{
+		{"e9a4d05b1f539d65c59015a079ee89aabeafbcfc9734342d9559f81601e85417", "b74d3a5b3200ab1126fbee393496f33da497d4d9a7c56693f44d6155c0c34e13"},
+		{"27b2bfc25257e53819beaf36ce1070007e04e7aad2e440a1f1fc066f59a61123", "522ce51aff96041e79a8476f508fb9661f146f189e288f83cb4837517cfc0127"},
+		{"66392eaae6674267c55fe393d39443ba90317a709d6e8f92a9f3e4abc18eff1d", "e3dc235e48c1811943fc249fecd0f1415a50ebe839ccefb0bd820a76fb77ba2a"},
+		{"e7462eebb81405230db8014b052d65fe7b269c3870e40b12cf64668ed6c2d40e", "727df0965e34144ea637be18208cc81e57e423010b3159c20f0ccff45c42212a"},
+		{"1ad8528b4c7075013a2d6561a02517b0482c0733dc018ac68774db857deb5004", "5df3a77577135784da2a9ee78f5026092b7d6bb9e6e95882d6cb172c0cb62208"},
+		{"aa0ff53bfc50861f871d94df18c3ac0b97f44ceb13436b33490cec5f6ce8e700", "30421d05b905aeaec0473ba29ace034bf73c406866d7dc23007eb9c34a596827"},
+		{"0448c0a6ed57b177c4c45de478b58d29f24e7ea842814305443e87188ae24324", "5ea1a704d8972af5a028367c8e3fb48ee61a603c6ea3a4c9247b0f611a6ab002"},
+		{"4b6a6edbdd11e69befe3f4a3c976baca320c4bcb188f129b603ebb198f663000", "451d6185e8ad2c8873f034683b9caca43ea7ceb1b839abd3e01c3f19f3e6bd1e"},
+		{"c3fba34855b33f025696326d2980ddc3fb47d90459ed6a4488fbb2e4e12ccf2b", "74674a86144ea866ad8fe633e256783bda4a07b997cb412c53a5eaf4cc7b6a0e"},
+		{"0c35b8b94a720f1c26d7c6241c9f3ea5332a87cf3730b25ef31b68854c10e405", "6915df8d8ad19ec17be37c299eed762f9b63e841cd7963e13e8db6890dba082d"},
+		{"a60b021677da95ba46c8c3411ac77f3e3b06937a8d189517111c045880029909", "bbfcd22ecb44cec6fd0717cd0f21b26e6e8b2c91e1a6cb5d8610e2f2ad41c90f"},
+		{"2f4d662e66fbe754b708b87ea3d75a01d2ea4d7bf33c615c2376211dcc3b560f", "c67f7e622c3293028b9f86571e82c49551eb5fd308a35eb663498cffac208810"},
+		{"d90a1afa96c14c8d3b989a9cf23d6e8b9907da42724e44a3ac74ae015b6ce22e", "f0795b1bdd0a907252b6ab047642d97be076a16ea69d463f1a4bec00c817202e"},
+		{"dfa0764d89c8da10777504e5274f1baccf8b4145deba72b26503474318fb6410", "9f8aa8e833ea2f13cccfb6d9f2f04fd7be9c9f3019540c05c1986b3bce254e25"},
+		{"e17490013b6b53a40964ff1067b922d4d73521e32fe394527b39c1bfd4a5e712", "7a8fa23a0e4b14a36f2818a7d98639f6e4934c028da780a6cc658fbf76e80a26"},
+		{"7a9328d1075373dddb1b1100e8217ffaa1f9b632911b95a8fdc08870b15a8410", "94b2ae70c046b94873098c19fe18e7b17db2d31fe6a7eb73fea8168395e3c122"},
+		{"ce319bb1447da5bf51a88ab3379dbea539b5a431d3c4f131048cf7b05c52161d", "cdfa264ab8a51bbc9fff5732cf544bb06abba7e807a8c252a5f9ce785c6ff22c"},
+		{"d3818503bfcbef9ca03fc4472be77cb4936a1720001fc5e54852f769448fd313", "e72792abd906976c75a5670de514894a720c5293cf74338a9c2987640a949c0b"},
+		{"4f9b8d118460736eb62602d12d3aed62938d4d4374b8c88704cf40c415c0901e", "2ecbe4588ade31924a1053fe0204950a0b4924878b312e56b2d0522f92a5f01c"},
+		{"39b59fd96adaf9633edcc8cef10049cddf5f7df8ac80af8aafa436d62ee7f905", "b94f7a979df8a95fc2766a9a96308ff39a14daf7b7d6bc48591d2ea4c764bf00"},
+		{"73cb0d25995d182b361c8237852bafeab8bb951de99f730da2913a239400c322", "da04e6e4446b6bcd54667b741444d826abbc5b76572d28474dfa94db91144606"},
+		{"2753423b83bba5bb8b2799bc58125c46fb03ec05e8579d772cdc6e75b0875009", "ee040010ec20e7293431a3692d06416f71162d176a316b0329a76edf6f3fb30d"},
+		{"cb73ec9b67355ce6275b51144a0759de28bb9390aab20514ee49a3bd8ce5361b", "c7c6e2ad3efe1f03b398241bddb67b008dd5e8caf1a17db9c33d2e2388d58e0d"},
+		{"bdb386d9f3fe5613ede926d80246682a5d32392f7f6c9d818a80d8e7a12e371b", "21d48c74f422ef72cb9db18799916b3c11d0cb99cec808563e2db22047840902"},
+		{"60f2fcfe341034449046c1fa330f6aceff737a9837a7d6d3a4885f8afce4a809", "e4c8f26f9e4127511b5ab21f1705913d7beaa2767cb7d033564e36bd2693370c"},
+		{"1223d64fb5c44921c1ae66d91543780634c2f7bae7e184e09c4e5447e6d1180b", "290ab84714fc3534c5ba22b2aa7696ac03ed12c9cf1c409a777bac05475ea406"},
+		{"b79c593316c42280d316bb7f3b43c7a5f5e29786d1ca6c0424463470eefe2b2f", "f4e44ac9574c4d32ab403e71dd00554eee0d8e34d04611b66ab2e59c49bff025"},
+		{"e6548f669ebe655cb6600432e1af14c43da7286e3620289b51cc947517db9c14", "ace261e3964a1dcb389a693f52104018cd475e6856ae37fe4892df9482954902"},
+		{"81be54409c9364f4842209e0f79b190afd9df017cc9790e11196d4bf5108f100", "d986b22e422703e065f12b6fd608813028ff913d4ffeb54b19e6537456391b23"},
+		{"940ff0d3b4549d1baf7ad900cf6aedde02833b777e39c411e6efe7bcdd2ef305", "d672bb8a6e75b47fdbb365de0516f3fa827b287c9666e64d1b6768e2c8949412"},
+		{"b4fe300aa1c8c836b3cc4c167df86d08fb7213200b8d9f7ba7963170e6dc8c0a", "5f7db6a9867f3f5c9fd1955c02cf96056d1225be950cd432818f8f1c16152020"},
+		{"2c34a2bdb3738cb78270207dcae40ae47178bf4216bd2044ba124ec49240522a", "8c490c78d7d735ab32493510cc2ec9c3742d3f47e46cfd754859e91271673e15"},
+		{"fc03857a3ff92d17d40bf9bb9b99e01e85fe4c698450147dc74cde60b2e9fa2d", "c0a22acdababbc42bba5bc0245a2ef9f2c74b215663440aed37c8e0bd7e00809"},
+		{"a267a96a35c63b03788e90bb9a440da9ac832b0be02537b6f0ecc928ea989223", "636ceacda5bce999ca303b7df32e9352af10083c6db6ed93c8a221efc385172d"},
+		{"ce4e15a2c1667a9dac4c4732de6c91f8c523c449f8c9be6b895644460717a209", "d55c6523f40b36d2519b30292873bd469aeda6dbdbafe7c5fd405438dcc6bd12"},
+		{"4c617cdea4e3cb008c396c59b701375409304d84cfa17fe9d6d91a15fa412306", "a6dc21a9c35418a39c69f2d8e9df738db0b36fecc44eddf364846b84c5362819"},
+		{"8c33aa2b3d94f9b11cc62ed1a304b92be370384ebbbf67c886dcd6ce544cc806", "7caca2b1ab8c70b58ba36794a988fd6ec50c2a04dd09d7cd28e67ca1f1401d2c"},
+		{"1b6fc8f4007e6cdcf89a496cf0e711b0a3bbdbbae66830450a9744f5c802a228", "c3b79478bd32feb99a0c92001efb97953efdad8c2338ed2ac14a313592c12418"},
+		{"0c6837e83ee0f1b1e5fe31bdf0960aefa2162ef7de7c0c886df930839bd4db06", "8b2667b5151ab13f0f87fb014cd3ebb7ab1e92a528f00ebd91b514ea61b8f52b"},
+		{"8da38060963597c34544d8b10432a2e34d8eada7d1479f4fa5e96dca32250c27", "7bf525115a8e6f772feb6d4db0f2a6b0d4233e0ff85e180c3249e18f0d08f42e"},
+		{"50b0c6d85f6a9d11fc52f1fc9e43b778380bdf936ddfd293940c77e79bc8340d", "bbb9e297de81ef341e032484d7b33b29e7d9e3be1414feaf2bbc0957ba408811"},
+		{"6e8fd3ad20cf32ff8ba6e4bd8d4f05f3cc20d88631cbd3aa5f7f98446d725108", "a9fe7404613b040412049a205301f2175b53d7012087047a8dc7501a381f5210"},
+		{"c291bb32d69cfef7e80b6dadd2a1198d05ac23eb30be6503d1c4c04350de2028", "f44f8ca09d849551f72a6692c793319eefaa0c02d3301ae79c2f869f4251d422"},
+		{"116d4c2e21101f819a87f0de31dec56a4649c9ad9e539b71680dd439b288681d", "9f4df65e05390be63bd6e3e38d8afb6117d5d357d56f35ecf63406096fdd810c"},
+		{"1813ed3760299a16e623084a852de9b12caaf8138744f8903a357fa9a2dbb00c", "f37baacccd07bc489f50b851f807c88a425e41dd9dda8068e75cffb8bf653a0f"},
+		{"545e62d72cbb89db1c17e7ad8bb0660a74f8bc411b16eb0452d9a2d7c3e5b01e", "96ddc93a86b091c7b1951d7371f80a352d85c38606e450aa2af272e8929fae19"},
+		{"0f5d5941474697c21ea6aecc29ff7cadbd28dbf29531431a40aaea3b7acd1514", "e83d0ff3ab4db81fb19c1b6125d7d2e4a34a83a8d463049d06df4870dbb2a525"},
+		{"52605bc1f48092f9d5ad4c2a840a60f129e6aef2eef9c92474951ed1e10e381c", "222df3afb8b20685c872f29ebfc7e4056fcdafe1d8a77a9f9ba08ac8f426190c"},
+		{"eee8cdee57e9f11ad0174c1514bba4c3a2c2a10d099876195726217445462f0b", "a000e5799ac933154bae228c09b522c714fb9a57f530d1954947277be9db0a24"},
+		{"8c7d04dc3916370f8186dcffc92ad482294ab49c9ce36a5bd13473dc7c4d491a", "788e35bcd82efbce15b3444f36330337ce3adb67bfc6329149cd25069ac9eb19"},
+		{"004a720f9edabb7f82eb30a78da45aceccbca5eb69583e1e8018ec1359a61f27", "e3d319d64bea8069a649acd33859b22361da799e0296f3d4f5117e16feb18e16"},
+		{"38716f1d7cde7e37795a5b2d6d6317eecbf0adc6dcf7dcc6ee02cc25d1efb22f", "95c229d0cfc1485f2be0a23de6e49601a2ea55652beead84a67cd727c21a1301"},
+		{"22cac7a49e99f3d071812abb0addafa4bf9a65308769728e4cd53cc7486f6c13", "a2e5b90606809964bc20d776b9cbcaab93a2f25124998ae3bd698d061f7afd00"},
+		{"5109c7a41f73baa4787358b72ff1095439602add7a86a034b87b74360ee2e20f", "a31b3e2033ed828b5a51b9428f8f6ea40267259df08fdcd2c0e34dd335bdf90c"},
+		{"957a87470f29a135567085c3d6d6ed14885bab4eb659725534a45a9f100a471c", "8f3005df282d5a87fa33405e35a313233d05731e87cfcbe060fa067596fa3013"},
+		{"e0dad57606c2b293dc7c841c965cb29736d2411003e9284a0ae94d13e3d03d2e", "0543643ef0b617030dcc292451ebcace8bad20706528cb6aedb98dcea66aba27"},
+		{"f1f10938c8a55b6b15b3f12beebb702133401135937c5c3f2d7fba702f24da09", "dc862a8a5ad5107421d550731a7f561e4064878c3654bf88b230cc249e91091d"},
+		{"4bbc08d78c9970235778d6bd9939c7b2b1bd88b9d1cde6473663ae96ae776911", "3584be9ce31a7fb3aae8515011f4d3eeb86a573b225a88577e4911050bc35013"},
+		{"c8325b31c9295757ca23d8f5256eebc5ccc517d28e00bfda5f4d709441d66713", "b81f360903160485c470625519cb18219b44d8b740273ef742fefc5653daf009"},
+		{"69a6b3e22fbe5879efa56cdb5d50605732bf7f311e28ba037916b4db61ae8a14", "10ddf800eb3e67da20575456150cb1f0d49506d97ed4ef2d91b951af48966924"},
+		{"c2a0e3586d4bb49f2ef979686c3a9a1619d0d54ac89641d592b4628b19dee401", "bc3ba677f6d13ef9f023d4a3b9f073c3eea910ef90cfd24b7f54414d2d02d315"},
+		{"5b89051b79ff37457760d7af2ebc68be955e47eb6cdf306fbd369dc19fc52c05", "7bfe2a9d5bb2ade0f9058ea27a07c867af21670d2b9e84bdcc8967d4cdc4ba11"},
+		{"46ac45f35cbc23bf68906933ad29240054a0a1d89c1832ebb54aa1bc32644105", "e891e783d5615a1b8ab838f68f6f2ce4e359510ddd40882d4650327d08a5bd11"},
+		{"581e067b37c40caf861c190922f816e6cb850540df7ceb159f96c48c1c70cd23", "0d49fa8c74202369c36f4121eab0aa3ac9206ad3419fc9517a88493b07d6fb25"},
+		{"bb7eb4ba2b45a22e14fad963c04eadbe8e7aab6ff912b008c9e7dd2a2c7d3615", "758ed0c8cef51f82508072fa758265f0f0eef6c7b2401b94ebe27a638ce33125"},
+		{"a08f3cc9904f672b94d1f5a14dedbdef4ed229da5b66eca0135090d6f0ba0728", "542c952395d241cfa15bd48922e9c7fc292dbdd120daa3d66dad67fb3abb700a"},
+		{"105bac5c449441bd5f5cf39b431f703e2e8f6a30a90d86cfdf425ec728fdbd08", "b59206f1d556fb98329a7111e3c89bf1e6a4861ec38c82eafa81cff70b713e0d"},
+		{"45df2edfaea234dab99efa9a402c0d2feaa841ff3c990c926473173283d95913", "db008cf922c3a50549373a14f5f18b2dc827bd6e168402dfe3e6ece4cb137527"},
+		{"488dd6437c15ef5b85e84407b7e599cc078c195ed2fc27b366ddac7739f1eb14", "0448887f55c677464e7e540adf107ba10fc6713e8a2718fe92cbd4794ef4be17"},
+		{"3fe697698f3504e15eb5d509efa91624d9aa4eae24beeb42ffcb3c6ea8372a30", "441ccb28e7c6c1893a58f7513c9b7c1c5d0adf3de452644a837d7e08e1ab8117"},
+		{"9bb5801272264c74db75f1c6812747bf338ea6880fa4dd2d51ef651ef73c2e04", "e2eefd80e838c30b3f1fb0313fcfcb1e1556439d0346d17334df83c33247b20e"},
+		{"bad37a1467c4fe875b78508656f2816414ef602ae2ccd4e9430d94ca5c1cd911", "21c72ccdbaed2e3ea9dac3881531467b64c9322199127f2ae2fa4bb31bad591d"},
+		{"95c72237ccbaedc185b1abfc59059c454175df81bb3ff65e5a61e2cb5263ed0d", "1040728a4775ac5cf7a9c75dda2f0aee1fabd6b202b5e916636e3aec73a09d0d"},
+		{"738e8b9af4d199bc95f70b2a9b25e999b39af15c6a02f2eca058326078745f2a", "004835960aa03e101d818907df453cefdfb910b44ad9bd056a83b2ef40a5ca0d"},
+		{"0d88caf486f2fe60bfc08697d1b617b586ec880e38e4ff56f145a5db0ab6d12e", "a7b19323815295bc84c50535b62c3d4d53dbfc434441eb3c009568fb8f7b2b1a"},
+		{"b37af7fd314d90590fba8ebf730397cfdaa97f86d3f31d1a7ddc817ff303791f", "8296a80eceae97f92784642da34f121e29db2c5f3baf9a2722896db22e98b703"},
+		{"6b67dd3051a8cb113431f5a14e279d910b7b4798ccb03ff588cf312ffe366a0b", "9c38cc543a0b793be4a0d66de3b2cd30b1f33d36c4402a165da924d7e6f89a12"},
+		{"72fc4c40e406b9d1b34daba614460922fc53951abd6db5834e1f1b07fa319f27", "daa4d50481ba47c4a78ae3848a9b268b1d8e0579b4967ebcdece47d386410d02"},
+		{"a4ce5cb2b2a23dcf019f275058a4092901c4793e6ee7d29282e755dd0d0df000", "00749453d23051f3587911c34d52e2c2d093273d2283cd6dfba94d7a89cdb226"},
+		{"9e00df0216e8ac8e72abfeab1106373a13699714c691f04a549f6b58ea974521", "0e69dbfd9023b8bb58ce7e17972d7c94d49e8464f9c22161d7564ed32c53ef27"},
+		{"fe1a558c6315f425fea7c04dcf6db869acd7b62b1b848200d5709e73d53de71b", "66cd33cc8d61cb807092d76ac0e506014fc55624a39ee2afa67f9ba58eb21022"},
+		{"3ca542e17e4cbc74f47afb399b12295d15dfbae5e966509b7e6cae2df61a430a", "57a0df429ed3720dee61ca720a4617243b41472f0c7766cc7ce625afddb3b41b"},
+		{"c1a77855e9b0b1f7381c9acd69ff68fdfa65f1f753dcea22de5a28ed088c2b2e", "4fce521d725abb8a30d8c39a2a22f496b374d8512b7a76afd3803f7200c86d19"},
+		{"17cda8d590adf3042bbf1452fe3d79b959f284f3df1e15ee3c696286f0ba832e", "8919e92a175b55003379ca6e546a04228aa9da861a9669e0e9b106e4a204d404"},
+		{"959fa9337b4b479ce5fcff7ff9096a344acf7fcde2f8852e28904236472f2f02", "79e688ecfece239223b745e4b95460bfcb02aee12b154e15db616fda857dcd06"},
+		{"d062d34cbdfbc50004a631e3dd8f21b446673b53830aa71fdcbc741e7d4fb31c", "2203af0127657f4e8a1c5ec44bb25028e64ad388efd0b9bfe2105f4f3ff66d0f"},
+		{"d2d3e3034864944914709549ce27068b5f27bd18b0edc940593df2dc5c5dae23", "5ae75206bfdc8f54a8673d5d4c4b464ba1e84ae2410418b5c5e98fa993608113"},
+		{"4ab457d6478fb27214345f0bc2e00cbb29cd55bed1f8e05c23b8f7810e134a1f", "3db37711e355ed46ea81bb6e31ae87b37b706a8d17e2aa976c7c7706c8e18d19"},
+		{"5aa17884c96ecdaf81e2b343dbf051e4ace41935e53378ac10a4387e2cb0c404", "7118986268a748881f6144fc1008e90b40afc702be53784ed4cbceb8606e0714"},
+		{"82f4ca6b751ac067e451ae1d5115806e7a1d14ab444084a8ac48046b88b43b30", "8a09186c2a5cb0f16e273be6a8710620006a77afe7c54149bea3dce906345a02"},
+		{"55d5d97de81e0cc4d2ac97e507d4d6d9874cb55e1522b89ed2050ff3c20a4912", "27facefe4e2041e11a21889205af6c11eba73e3e8779b801bf3f7253730f1d04"},
+		{"845177f4584f61071ddea21e9a6c0a17e1a9408e0c073047c339498ff383c109", "25bc572d1c861fe80156c2fd440e7d9110be8252723d276e806dcc012f8da103"},
+		{"ecec46dfdaf45f49f82ee78fd9c8c747c049de9becaf440f90391c04dd119002", "b922e1a7caf72db69dcc062424c7ce75728d010c4c201c2ed8e635a617c81a1f"},
+		{"8e265fd9f2a4b158a5eb4bda000a6124af909e118b7510f0ec418559aad85825", "aed92a21e9933bd2ce6c9f09bb7753b46ea31248b324c12726cff08e464bdd0c"},
+		{"99d7181572d3ae637a277dcc0c35b9b98bbb6ecf3cdcc69af3e946a5bfeb520f", "89217b554371a2495ee473f867b2e26ea70d4245aceb462a98dd31a37d2d5330"},
+		{"a5e1fd149ae27f34e7902ebf380277c0b7f09f37e8809d25a0b8df2965d24e29", "2d6a16a254cfc3894d5500f8c40feb1e84876bc51c68c381109e83f001b41c2f"},
+		{"7fd221da235bb6e5fd0ae047f1aa49615ddbeecfb71ccb976bf3e0534425661c", "9ea41ccc3e09572927b0d9f618e1135d384f33618b6a0f80002f0a70be5eb324"},
+		{"b125c1b45daa68f96be6a5b3e4dd24e4a0e49e46226d841eb73754a498c43b21", "360b9c39d25451ae58cf651c530155f91e324292b55475a92506de726f153c18"},
+		{"d64536234849ababefa90b84f7b7cacf4b073809aa9b0c35581426521f18d81a", "d2dae030312cd4325bb036aa3436b26b9bed69b4d78d68bd49dbdde3173f1510"},
+		{"d1ce3aea6cfb7be132d17e8d76fcbe4b7e34cef3979b4b905acfeff2f6d19724", "be47b76297791f535f4b56f973a19f07ec22d4eede2a41ff23c696089938bb21"},
+	}
+}
+
+// STATIC_GROUP_MERKLE_ROOT is the root of the Merkle tree constructed from the STATIC_GROUP_KEYS above
+// only identity commitments are used for the Merkle tree construction
+// the root is created locally, using createMembershipList proc from waku_rln_relay_utils module, and the result is hardcoded in here
+const STATIC_GROUP_MERKLE_ROOT = "a1877a553eff12e1b21632a0545a916a5c5b8060ad7cc6c69956741134397b2d"
+
+// the rln-relay epoch length in seconds
+// TODO: change data type
+const EPOCH_UNIT_SECONDS = time.Second * 10
+
+// the maximum clock difference between peers in seconds
+// TODO: change data type
+const MAX_CLOCK_GAP_SECONDS = 20 * time.Second
+
+// maximum allowed gap between the epochs of messages' RateLimitProofs
+const MAX_EPOCH_GAP = int64(MAX_CLOCK_GAP_SECONDS / EPOCH_UNIT_SECONDS)
+
+type Epoch [32]byte
+
+func BytesToEpoch(b []byte) Epoch {
+	var result Epoch
+	copy(result[:], b)
+	return result
+}
+
+func ToEpoch(t uint64) Epoch {
+	var result Epoch
+	binary.LittleEndian.PutUint64(result[:], t)
+	return result
+}
+
+func (e Epoch) Uint64() uint64 {
+	return binary.LittleEndian.Uint64(e[:])
+}
+
+// CalcEpoch gets time `t` as `float64` with subseconds resolution in the fractional part
+//  and returns its corresponding rln `Epoch` value
+func CalcEpoch(t time.Duration) Epoch {
+	e := uint64(t / EPOCH_UNIT_SECONDS)
+	return ToEpoch(e)
+}
+
+// GetCurrentEpoch gets the current rln Epoch time
+func GetCurrentEpoch() Epoch {
+	return ToEpoch(uint64(time.Now().Unix()))
+}
+
+// Diff returns the difference between the two rln `Epoch`s `e1` and `e2`
+func Diff(e1, e2 Epoch) int64 {
+	epoch1 := e1.Uint64()
+	epoch2 := e2.Uint64()
+	return int64(epoch1) - int64(epoch2)
+}
diff --git a/rln/utils.go b/rln/utils.go
new file mode 100644
index 0000000..f51a993
--- /dev/null
+++ b/rln/utils.go
@@ -0,0 +1,36 @@
+package rln
+
+import "encoding/hex"
+
+func toMembershipKeyPairs(groupKeys [][]string) ([]MembershipKeyPair, error) {
+	// groupKeys is  sequence of membership key tuples in the form of (identity key, identity commitment) all in the hexadecimal format
+	// the toMembershipKeyPairs proc populates a sequence of MembershipKeyPairs using the supplied groupKeys
+
+	groupKeyPairs := []MembershipKeyPair{}
+	for _, pair := range groupKeys {
+		idKey, err := hex.DecodeString(pair[0])
+		if err != nil {
+			return nil, err
+		}
+		idCommitment, err := hex.DecodeString(pair[1])
+		if err != nil {
+			return nil, err
+		}
+
+		groupKeyPairs = append(groupKeyPairs, MembershipKeyPair{IDKey: IDKey(Bytes32(idKey)), IDCommitment: IDCommitment(Bytes32(idCommitment))})
+	}
+
+	return groupKeyPairs, nil
+}
+
+func Bytes32(b []byte) [32]byte {
+	var result [32]byte
+	copy(result[:], b)
+	return result
+}
+
+func Bytes256(b []byte) [256]byte {
+	var result [256]byte
+	copy(result[:], b)
+	return result
+}
diff --git a/rln/waku_rln_relay.go b/rln/waku_rln_relay.go
new file mode 100644
index 0000000..8691a6c
--- /dev/null
+++ b/rln/waku_rln_relay.go
@@ -0,0 +1,296 @@
+package rln
+
+import (
+	"bytes"
+	"encoding/hex"
+	"errors"
+	"math"
+
+	"github.com/decanus/go-rln/rln/pb"
+)
+
+type WakuRLNRelay struct {
+	MembershipKeyPair MembershipKeyPair
+	// membershipIndex denotes the index of a leaf in the Merkle tree
+	// that contains the pk of the current peer
+	// this index is used to retrieve the peer's authentication path
+	MembershipIndex MembershipIndex
+	// MembershipContractAddress*: Address
+	//ethClientAddress*: string
+	//ethAccountAddress*: Address
+	// this field is required for signing transactions
+	// TODO may need to erase this ethAccountPrivateKey when is not used
+	// TODO may need to make ethAccountPrivateKey mandatory
+	//ethAccountPrivateKey*: PrivateKey
+	RLNInstance *RLN
+	// the pubsub topic for which rln relay is mounted
+	PubsubTopic string
+	// contentTopic should be of type waku_message.ContentTopic, however, due to recursive module dependency, the underlying type of ContentTopic is used instead
+	// TODO a long-term solution is to place types with recursive dependency inside one file
+	ContentTopic string
+	// the log of nullifiers and Shamir shares of the past messages grouped per epoch
+	NullifierLog map[Epoch][]ProofMetadata
+}
+
+func CalcMerkleRoot(list []IDCommitment) (MerkleNode, error) {
+	// returns the root of the Merkle tree that is computed from the supplied list
+
+	rln, err := NewRLN()
+	if err != nil {
+		return MerkleNode{}, err
+	}
+
+	// create a Merkle tree
+	for _, c := range list {
+		if !rln.InsertMember(c) {
+			return MerkleNode{}, errors.New("could not add member")
+		}
+	}
+
+	return rln.GetMerkleRoot()
+}
+
+func createMembershipList(n int) ([][]string, string, error) {
+	// createMembershipList produces a sequence of membership key pairs in the form of (identity key, id commitment keys) in the hexadecimal format
+	// this proc also returns the root of a Merkle tree constructed out of the identity commitment keys of the generated list
+	// the output of this proc is used to initialize a static group keys (to test waku-rln-relay in the off-chain mode)
+
+	// initialize a Merkle tree
+	rln, err := NewRLN()
+	if err != nil {
+		return nil, "", err
+	}
+
+	var output [][]string
+	for i := 0; i < n; i++ {
+		// generate a keypair
+		keypair, err := rln.MembershipKeyGen()
+		if err != nil {
+			return nil, "", err
+		}
+
+		output = append(output, []string{hex.EncodeToString(keypair.IDKey[:]), hex.EncodeToString(keypair.IDCommitment[:])})
+
+		// insert the key to the Merkle tree
+		if !rln.InsertMember(keypair.IDCommitment) {
+			return nil, "", errors.New("could not insert member")
+		}
+	}
+
+	root, err := rln.GetMerkleRoot()
+	if err != nil {
+		return nil, "", err
+	}
+
+	return output, hex.EncodeToString(root[:]), nil
+}
+
+func RLNRelayStaticSetUp(rlnRelayMemIndex MembershipIndex) ([]IDCommitment, MembershipKeyPair, MembershipIndex, error) {
+	// static group
+	groupKeys := STATIC_GROUP_KEYS
+	groupSize := STATIC_GROUP_SIZE
+
+	// validate the user-supplied membership index
+	if rlnRelayMemIndex < MembershipIndex(0) || rlnRelayMemIndex >= MembershipIndex(groupSize) {
+		return nil, MembershipKeyPair{}, 0, errors.New("wrong membership index")
+	}
+
+	// prepare the outputs from the static group keys
+
+	// create a sequence of MembershipKeyPairs from the group keys (group keys are in string format)
+	groupKeyPairs, err := toMembershipKeyPairs(groupKeys)
+	if err != nil {
+		return nil, MembershipKeyPair{}, 0, errors.New("invalid data on group keypairs")
+	}
+
+	// extract id commitment keys
+	var groupOpt []IDCommitment
+	for _, c := range groupKeyPairs {
+		groupOpt = append(groupOpt, c.IDCommitment)
+	}
+
+	//  user selected membership key pair
+	memKeyPairOpt := groupKeyPairs[rlnRelayMemIndex]
+	memIndexOpt := rlnRelayMemIndex
+
+	return groupOpt, memKeyPairOpt, memIndexOpt, nil
+}
+
+func (rln *WakuRLNRelay) HasDuplicate(msg *pb.WakuMessage) (bool, error) {
+	// returns true if there is another message in the  `nullifierLog` of the `rlnPeer` with the same
+	// epoch and nullifier as `msg`'s epoch and nullifier but different Shamir secret shares
+	// otherwise, returns false
+
+	if msg == nil {
+		return false, errors.New("nil message")
+	}
+
+	msgProof := ToRateLimitProof(msg)
+
+	// extract the proof metadata of the supplied `msg`
+	proofMD := ProofMetadata{
+		Nullifier: msgProof.Nullifier,
+		ShareX:    msgProof.ShareX,
+		ShareY:    msgProof.ShareY,
+	}
+
+	proofs, ok := rln.NullifierLog[msgProof.Epoch]
+
+	// check if the epoch exists
+	if !ok {
+		return false, nil
+	}
+
+	for _, p := range proofs {
+		if p.Equals(proofMD) {
+			// there is an identical record, ignore rhe mag
+			return false, nil
+		}
+	}
+
+	// check for a message with the same nullifier but different secret shares
+	matched := false
+	for _, it := range proofs {
+		if bytes.Equal(it.Nullifier[:], proofMD.Nullifier[:]) && (!bytes.Equal(it.ShareX[:], proofMD.ShareX[:]) || !bytes.Equal(it.ShareY[:], proofMD.ShareY[:])) {
+			matched = true
+			break
+		}
+	}
+
+	return matched, nil
+}
+
+func (rln *WakuRLNRelay) UpdateLog(msg *pb.WakuMessage) (bool, error) {
+	// extracts  the `ProofMetadata` of the supplied messages `msg` and
+	// saves it in the `nullifierLog` of the `rlnPeer`
+
+	if msg == nil {
+		return false, errors.New("nil message")
+	}
+
+	msgProof := ToRateLimitProof(msg)
+
+	proofMD := ProofMetadata{
+		Nullifier: msgProof.Nullifier,
+		ShareX:    msgProof.ShareX,
+		ShareY:    msgProof.ShareY,
+	}
+
+	proofs, ok := rln.NullifierLog[msgProof.Epoch]
+
+	// check if the epoch exists
+	if !ok {
+		rln.NullifierLog[msgProof.Epoch] = []ProofMetadata{proofMD}
+		return true, nil
+	}
+
+	// check if an identical record exists
+	for _, p := range proofs {
+		if p.Equals(proofMD) {
+			return true, nil
+		}
+	}
+
+	// add proofMD to the log
+	proofs = append(proofs, proofMD)
+	rln.NullifierLog[msgProof.Epoch] = proofs
+
+	return true, nil
+}
+
+// TODO: change optionalTime data type
+func (rln *WakuRLNRelay) ValidateMessage(msg *pb.WakuMessage, optionalTime float64) (MessageValidationResult, error) {
+	// validate the supplied `msg` based on the waku-rln-relay routing protocol i.e.,
+	// the `msg`'s epoch is within MAX_EPOCH_GAP of the current epoch
+	// the `msg` has valid rate limit proof
+	// the `msg` does not violate the rate limit
+	// `timeOption` indicates Unix epoch time (fractional part holds sub-seconds)
+	// if `timeOption` is supplied, then the current epoch is calculated based on that
+
+	if msg == nil {
+		return MessageValidationResult_Unknown, errors.New("nil message")
+	}
+
+	//  checks if the `msg`'s epoch is far from the current epoch
+	// it corresponds to the validation of rln external nullifier
+	var epoch Epoch
+	if optionalTime != 0 {
+		epoch = CalcEpoch(optionalTime)
+	} else {
+		// get current rln epoch
+		epoch = GetCurrentEpoch()
+	}
+
+	msgProof := ToRateLimitProof(msg)
+
+	// calculate the gaps
+	gap := Diff(epoch, msgProof.Epoch)
+
+	// validate the epoch
+	if int64(math.Abs(float64(gap))) >= MAX_EPOCH_GAP {
+		// message's epoch is too old or too ahead
+		// accept messages whose epoch is within +-MAX_EPOCH_GAP from the current epoch
+		//debug "invalid message: epoch gap exceeds a threshold", gap = gap, payload = string.fromBytes(msg.payload)
+		return MessageValidationResult_Invalid, nil
+	}
+
+	// verify the proof
+	contentTopicBytes := []byte(msg.ContentTopic)
+	input := append(msg.Payload, contentTopicBytes...)
+	if !rln.RLNInstance.Verify(input, *msgProof) {
+		// invalid proof
+		//debug "invalid message: invalid proof", payload = string.fromBytes(msg.payload)
+		return MessageValidationResult_Invalid, nil
+	}
+
+	// check if double messaging has happened
+	hasDup, err := rln.HasDuplicate(msg)
+	if err != nil {
+		return MessageValidationResult_Unknown, err
+	}
+
+	if hasDup {
+		// debug "invalid message: message is a spam", payload = string.fromBytes(msg.payload)
+		return MessageValidationResult_Spam, nil
+	}
+
+	// insert the message to the log
+	// the result of `updateLog` is discarded because message insertion is guaranteed by the implementation i.e.,
+	// it will never error out
+	_, err = rln.UpdateLog(msg)
+	if err != nil {
+		return MessageValidationResult_Unknown, err
+	}
+
+	//debug "message is valid", payload = string.fromBytes(msg.payload)
+	return MessageValidationResult_Valid, nil
+}
+
+// TODO: change senderEpochTIme datatype
+func (rln *WakuRLNRelay) AppendRLNProof(msg *pb.WakuMessage, senderEpochTime float64) error {
+	// returns error if it could not create and append a `RateLimitProof` to the supplied `msg`
+	// `senderEpochTime` indicates the number of seconds passed since Unix epoch. The fractional part holds sub-seconds.
+	// The `epoch` field of `RateLimitProof` is derived from the provided `senderEpochTime` (using `calcEpoch()`)
+
+	if msg == nil {
+		return errors.New("nil message")
+	}
+
+	input := ToRLNSignal(msg)
+
+	proof, err := rln.RLNInstance.GenerateProof(input, rln.MembershipKeyPair, rln.MembershipIndex, CalcEpoch(senderEpochTime))
+	if err != nil {
+		return err
+	}
+
+	msg.RateLimitProof = &pb.RateLimitProof{
+		Proof:      proof.Proof[:],
+		MerkleRoot: proof.MerkleRoot[:],
+		Epoch:      proof.Epoch[:],
+		ShareX:     proof.ShareX[:],
+		ShareY:     proof.ShareY[:],
+		Nullifier:  proof.Nullifier[:],
+	}
+
+	return nil
+}
diff --git a/scripts/Cross.toml b/scripts/Cross.toml
new file mode 100644
index 0000000..6a32952
--- /dev/null
+++ b/scripts/Cross.toml
@@ -0,0 +1,32 @@
+[target.x86_64-pc-windows-gnu]
+image = "ghcr.io/cross-rs/x86_64-pc-windows-gnu:local"
+
+[target.aarch64-unknown-linux-gnu]
+image = "ghcr.io/cross-rs/aarch64-unknown-linux-gnu:local"
+
+[target.x86_64-unknown-linux-gnu]
+image = "ghcr.io/cross-rs/x86_64-unknown-linux-gnu:local"
+
+[target.arm-unknown-linux-gnueabi]
+image = "ghcr.io/cross-rs/arm-unknown-linux-gnueabi:local"
+
+[target.i686-pc-windows-gnu]
+image = "ghcr.io/cross-rs/i686-pc-windows-gnu:local"
+
+[target.i686-unknown-linux-gnu]
+image = "ghcr.io/cross-rs/i686-unknown-linux-gnu:local"
+
+[target.arm-unknown-linux-gnueabihf]
+image = "ghcr.io/cross-rs/arm-unknown-linux-gnueabihf:local"
+
+[target.mips-unknown-linux-gnu]
+image = "ghcr.io/cross-rs/mips-unknown-linux-gnu:local"
+
+[target.mips64-unknown-linux-gnuabi64]
+image = "ghcr.io/cross-rs/mips64-unknown-linux-gnuabi64:local"
+
+[target.mips64el-unknown-linux-gnuabi64]
+image = "ghcr.io/cross-rs/mips64el-unknown-linux-gnuabi64:local"
+
+[target.mipsel-unknown-linux-gnu]
+image = "ghcr.io/cross-rs/mipsel-unknown-linux-gnu:local"
diff --git a/scripts/build-cross.sh b/scripts/build-cross.sh
new file mode 100755
index 0000000..0ddfbf1
--- /dev/null
+++ b/scripts/build-cross.sh
@@ -0,0 +1,63 @@
+#!/bin/bash
+
+DIRECTORY=./libs
+if [[ -d "$DIRECTORY" ]]
+then
+    echo "$DIRECTORY exists on your filesystem. Delete it and run the script again."
+    exit 0
+fi
+
+export RUSTFLAGS="-Ccodegen-units=1"
+export CROSS_CONFIG="$PWD/scripts/Cross.toml"
+
+rustup default stable
+
+cargo install cross --git https://github.com/cross-rs/cross --branch main
+cargo install cargo-lipo
+# cargo install cargo-strip
+
+pushd lib/rln
+
+cargo clean
+
+cross build --release --lib --target=aarch64-linux-android
+cross build --release --lib --target=armv7-linux-androideabi
+cross build --release --lib --target=i686-linux-android
+cross build --release --lib --target=x86_64-linux-android
+cross build --release --lib --target=x86_64-unknown-linux-musl
+
+# These depend on https://github.com/cross-rs/cross/pull/591 being merged
+# In the meantime, we can follow the instructions from here
+# https://github.com/cross-rs/cross/wiki/FAQ#newer-linux-versions
+# to build the docker images locally. Once that PR is merged,
+# remove the CROSS_CONFIG variable and Cross.toml file
+
+cross build --release --lib --target=x86_64-pc-windows-gnu
+cross build --release --lib --target=aarch64-unknown-linux-gnu
+cross build --release --lib --target=x86_64-unknown-linux-gnu
+cross build --release --lib --target=arm-unknown-linux-gnueabi
+cross build --release --lib --target=i686-pc-windows-gnu
+cross build --release --lib --target=i686-unknown-linux-gnu
+cross build --release --lib --target=arm-unknown-linux-gnueabihf
+cross build --release --lib --target=mips-unknown-linux-gnu
+cross build --release --lib --target=mips64-unknown-linux-gnuabi64
+cross build --release --lib --target=mips64el-unknown-linux-gnuabi64
+cross build --release --lib --target=mipsel-unknown-linux-gnu
+
+# TODO: these work only on iOS
+rustup target add aarch64-apple-ios x86_64-apple-ios
+cross build --release --target=x86_64-apple-darwin --lib
+cross build --release --target=aarch64-apple-darwin --lib
+cargo lipo --release --targets=aarch64-apple-ios,x86_64-apple-ios
+
+popd
+
+TOOLS_DIR=`dirname $0`
+COMPILE_DIR=${TOOLS_DIR}/../lib/rln/target
+rm -rf $COMPILE_DIR/x86_64-apple-ios $COMPILE_DIR/aarch64-apple-ios
+for platform in `ls ${COMPILE_DIR} | grep -v release | grep -v debug`
+do
+  PLATFORM_DIR=${DIRECTORY}/$platform
+  mkdir -p ${PLATFORM_DIR}
+  cp ${COMPILE_DIR}/$platform/release/librln.* ${PLATFORM_DIR}
+done
diff --git a/scripts/build.sh b/scripts/build.sh
old mode 100644
new mode 100755
index 5d6924d..8b9d194
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -1,3 +1,5 @@
+#!/bin/bash
+
 DIRECTORY=./libs
 if [[ -d "$DIRECTORY" ]]
 then
@@ -56,4 +58,4 @@ do
   PLATFORM_DIR=${DIRECTORY}/$platform
   mkdir -p ${PLATFORM_DIR}
   cp ${COMPILE_DIR}/$platform/release/librln.* ${PLATFORM_DIR}
-done
+done
\ No newline at end of file