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feat(twap-oracle): implement CreatePriceObservations instruction

Browse Source 
Adds the CreatePriceObservations instruction to the TWAP oracle program.
The instruction initialises a PriceObservations PDA for a given price
source account and time window, writing the initial tick and timestamp
as the first entry.

Key design decisions:

- Per-window accounts: each (price_source, window_duration) pair maps to
  a distinct PriceObservations PDA. The window duration is baked into the
  PDA seed so a single price source can support multiple TWAP windows
  (24h, 7d, 30d) at independent sampling rates without sharing a buffer.

- window_duration not stored on struct: it is implicit in the PDA address.
  Any reader that located the account already knows the window duration
  used to derive it. Storing it would be redundant.

- Authorization is implicit: the PriceObservations PDA is derived from
  the price source account ID, so is_authorized = true on the price source
  proves the caller controls it without a redundant authority field.

- Impersonation is prevented by the PDA check: passing a controlled price
  source with a victim's observations account ID fails immediately because
  the computed PDA (from the attacker's source) does not match.

Closes #126
This commit is contained in:
r4bbit 2026-05-28 10:35:05 +02:00
parent 7b1696f98e
commit fe9d919299
16 changed files with 1020 additions and 319 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

114
Cargo.lock generated
View File

@ -336,9 +336,9 @@ checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
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46
artifacts/stablecoin-idl.json
View File

@ -260,6 +260,38 @@
]
}
},
{
"name": "PriceObservations",
"type": {
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{
"name": "price_source_id",
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{
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@ -294,6 +326,20 @@
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82
artifacts/twap_oracle-idl.json
View File

@ -3,12 +3,72 @@
"name": "twap_oracle",
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{
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116
programs/amm/methods/guest/Cargo.lock generated
View File

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116
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View File

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113
programs/stablecoin/methods/guest/Cargo.lock generated
View File

@ -278,9 +278,9 @@ checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
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@ -1286,9 +1286,9 @@ dependencies = [
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[[package]]
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116
programs/token/methods/guest/Cargo.lock generated
View File

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source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
checksum = "91622ff5e7162018101f2fea40d6ebf4a78bbe5a49736a2020649edf9693679e"
[[package]]
name = "elf"
@ -1238,9 +1238,9 @@ dependencies = [
[[package]]
name = "http"
version = "1.4.0"
version = "1.4.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e3ba2a386d7f85a81f119ad7498ebe444d2e22c2af0b86b069416ace48b3311a"
checksum = "8be7462df143984c4598a256ef469b251d7d7f9e271135073e78fc535414f3d0"
dependencies = [
"bytes",
"itoa",
@ -1286,9 +1286,9 @@ dependencies = [
[[package]]
name = "hyper"
version = "1.9.0"
version = "1.10.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6299f016b246a94207e63da54dbe807655bf9e00044f73ded42c3ac5305fbcca"
checksum = "eb92f162bf56536459fc83c79b974bb12837acfed43d6bc370a7916d0ae15ecc"
dependencies = [
"atomic-waker",
"bytes",
@ -1552,9 +1552,9 @@ checksum = "8f42a60cbdf9a97f5d2305f08a87dc4e09308d1276d28c869c684d7777685682"
[[package]]
name = "js-sys"
version = "0.3.98"
version = "0.3.99"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "67df7112613f8bfd9150013a0314e196f4800d3201ae742489d999db2f979f08"
checksum = "142bc4740e452c1e57ade0cbc129f139c9093e354346f0872ef985f4f5cf5f11"
dependencies = [
"cfg-if",
"futures-util",
@ -1638,9 +1638,9 @@ checksum = "b6d2cec3eae94f9f509c767b45932f1ada8350c4bdb85af2fcab4a3c14807981"
[[package]]
name = "libredox"
version = "0.1.16"
version = "0.1.17"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e02f3bb43d335493c96bf3fd3a321600bf6bd07ed34bc64118e9293bdffea46c"
checksum = "f02ab6bace2054fb888a3c16f990117b579d14a3088e472d63c6011fa185c9d3"
dependencies = [
"libc",
]
@ -1659,9 +1659,9 @@ checksum = "92daf443525c4cce67b150400bc2316076100ce0b3686209eb8cf3c31612e6f0"
[[package]]
name = "log"
version = "0.4.29"
version = "0.4.30"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5e5032e24019045c762d3c0f28f5b6b8bbf38563a65908389bf7978758920897"
checksum = "616ec5685824bcc94416c6d4a7a446eea774a31efd7062c8480ba6fd06d7a6e5"
[[package]]
name = "lru-slab"
@ -1680,9 +1680,9 @@ dependencies = [
[[package]]
name = "maybe-async"
version = "0.2.10"
version = "0.2.11"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5cf92c10c7e361d6b99666ec1c6f9805b0bea2c3bd8c78dc6fe98ac5bd78db11"
checksum = "746873a384ad60adc5db74471dfaba74bd278afbdcfd81db93fafcdfc8b5ca0c"
dependencies = [
"proc-macro2",
"quote",
@ -1691,9 +1691,9 @@ dependencies = [
[[package]]
name = "memchr"
version = "2.8.0"
version = "2.8.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
checksum = "6b947ae49db0d222b1dbc6b113ce7248a3fc3a6ca21b696717bfc000ba4484d8"
[[package]]
name = "merlin"
@ -1784,9 +1784,9 @@ dependencies = [
[[package]]
name = "num-conv"
version = "0.2.1"
version = "0.2.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c6673768db2d862beb9b39a78fdcb1a69439615d5794a1be50caa9bc92c81967"
checksum = "521739c6d2bac4aa25192232afe6841231376b2b26d4d9fae5ecf8ca5772e441"
[[package]]
name = "num-integer"
@ -1960,7 +1960,7 @@ version = "3.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e67ba7e9b2b56446f1d419b1d807906278ffa1a658a8a5d8a39dcb1f5a78614f"
dependencies = [
"toml_edit 0.25.11+spec-1.1.0",
"toml_edit 0.25.12+spec-1.1.0",
]
[[package]]
@ -2731,9 +2731,9 @@ dependencies = [
[[package]]
name = "serde_json"
version = "1.0.149"
version = "1.0.150"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "83fc039473c5595ace860d8c4fafa220ff474b3fc6bfdb4293327f1a37e94d86"
checksum = "e8014e44b4736ed0538adeecded0fce2a272f22dc9578a7eb6b2d9993c74cfb9"
dependencies = [
"itoa",
"memchr",
@ -3224,14 +3224,14 @@ dependencies = [
[[package]]
name = "toml_edit"
version = "0.25.11+spec-1.1.0"
version = "0.25.12+spec-1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0b59c4d22ed448339746c59b905d24568fcbb3ab65a500494f7b8c3e97739f2b"
checksum = "d2153edc6955a6c354fad8f5efd38b6a8769bdccf9fe50f8e1329f81b0baa5d7"
dependencies = [
"indexmap 2.14.0",
"toml_datetime 1.1.1+spec-1.1.0",
"toml_parser",
"winnow 1.0.2",
"winnow 1.0.3",
]
[[package]]
@ -3240,7 +3240,7 @@ version = "1.1.2+spec-1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a2abe9b86193656635d2411dc43050282ca48aa31c2451210f4202550afb7526"
dependencies = [
"winnow 1.0.2",
"winnow 1.0.3",
]
[[package]]
@ -3266,9 +3266,9 @@ dependencies = [
[[package]]
name = "tower-http"
version = "0.6.10"
version = "0.6.11"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "68d6fdd9f81c2819c9a8b0e0cd91660e7746a8e6ea2ba7c6b2b057985f6bcb51"
checksum = "4cfcf7e2740e6fc6d4d688b4ef00650406bb94adf4731e43c096c3a19fe40840"
dependencies = [
"bitflags 2.11.1",
"bytes",
@ -3437,9 +3437,9 @@ dependencies = [
[[package]]
name = "wasm-bindgen"
version = "0.2.121"
version = "0.2.122"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "49ace1d07c165b0864824eee619580c4689389afa9dc9ed3a4c75040d82e6790"
checksum = "3ed04576f974d2b2fba0f38c51dbc5518011e38c36bf1143164be765528fd409"
dependencies = [
"cfg-if",
"once_cell",
@ -3450,9 +3450,9 @@ dependencies = [
[[package]]
name = "wasm-bindgen-futures"
version = "0.4.71"
version = "0.4.72"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "96492d0d3ffba25305a7dc88720d250b1401d7edca02cc3bcd50633b424673b8"
checksum = "9473dbd2991ae90b6291c3c32c30c6187ac49aa32f9905d1cce280ec1e110b0f"
dependencies = [
"js-sys",
"wasm-bindgen",
@ -3460,9 +3460,9 @@ dependencies = [
[[package]]
name = "wasm-bindgen-macro"
version = "0.2.121"
version = "0.2.122"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8e68e6f4afd367a562002c05637acb8578ff2dea1943df76afb9e83d177c8578"
checksum = "916151b09da36bd82f6615cbf3a419e2f0ba23a03c6160e8e92eb6bd4aa1dec6"
dependencies = [
"quote",
"wasm-bindgen-macro-support",
@ -3470,9 +3470,9 @@ dependencies = [
[[package]]
name = "wasm-bindgen-macro-support"
version = "0.2.121"
version = "0.2.122"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d95a9ec35c64b2a7cb35d3fead40c4238d0940c86d107136999567a4703259f2"
checksum = "299047362ccbfce148b67ab7e73349f77748e00c8296f9542adfad2ad82c5c5e"
dependencies = [
"bumpalo",
"proc-macro2",
@ -3483,9 +3483,9 @@ dependencies = [
[[package]]
name = "wasm-bindgen-shared"
version = "0.2.121"
version = "0.2.122"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c4e0100b01e9f0d03189a92b96772a1fb998639d981193d7dbab487302513441"
checksum = "9a929b2c61f11ba3e9bc35b50c1f25cb38e0e892c0c231ae2b8cf78d5dad4437"
dependencies = [
"unicode-ident",
]
@ -3539,9 +3539,9 @@ dependencies = [
[[package]]
name = "web-sys"
version = "0.3.98"
version = "0.3.99"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4b572dff8bcf38bad0fa19729c89bb5748b2b9b1d8be70cf90df697e3a8f32aa"
checksum = "6d621441cfc37b84979402712047321980c178f299193a3589d05b99e8763436"
dependencies = [
"js-sys",
"wasm-bindgen",
@ -3792,9 +3792,9 @@ dependencies = [
[[package]]
name = "winnow"
version = "1.0.2"
version = "1.0.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2ee1708bef14716a11bae175f579062d4554d95be2c6829f518df847b7b3fdd0"
checksum = "0592e1c9d151f854e6fd382574c3a0855250e1d9b2f99d9281c6e6391af352f1"
dependencies = [
"memchr",
]
@ -3935,18 +3935,18 @@ dependencies = [
[[package]]
name = "zerocopy"
version = "0.8.48"
version = "0.8.49"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "eed437bf9d6692032087e337407a86f04cd8d6a16a37199ed57949d415bd68e9"
checksum = "bce33a6288fa3f072a8c2c7d0f2fdbb90e28298f0135c1f99b96c3db2efcc60b"
dependencies = [
"zerocopy-derive",
]
[[package]]
name = "zerocopy-derive"
version = "0.8.48"
version = "0.8.49"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "70e3cd084b1788766f53af483dd21f93881ff30d7320490ec3ef7526d203bad4"
checksum = "8fd425244944f4ab65ccff928e7323354c5a018c75838362fdce749dfad2ee1e"
dependencies = [
"proc-macro2",
"quote",
@ -3955,9 +3955,9 @@ dependencies = [
[[package]]
name = "zerofrom"
version = "0.1.7"
version = "0.1.8"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "69faa1f2a1ea75661980b013019ed6687ed0e83d069bc1114e2cc74c6c04c4df"
checksum = "0ec05a11813ea801ff6d75110ad09cd0824ddba17dfe17128ea0d5f68e6c5272"
dependencies = [
"zerofrom-derive",
]

4
programs/twap_oracle/Cargo.toml
View File

@ -5,4 +5,8 @@ edition = "2021"
[dependencies]
nssa_core = { git = "https://github.com/logos-blockchain/logos-execution-zone.git", tag = "v0.2.0-rc3", features = ["host"] }
clock_core = { git = "https://github.com/logos-blockchain/logos-execution-zone.git", tag = "v0.2.0-rc3" }
twap_oracle_core = { path = "core" }
[lints]
workspace = true

4
programs/twap_oracle/core/Cargo.toml
View File

@ -3,8 +3,12 @@ name = "twap_oracle_core"
version = "0.1.0"
edition = "2021"
[lints]
workspace = true
[dependencies]
nssa_core = { git = "https://github.com/logos-blockchain/logos-execution-zone.git", tag = "v0.2.0-rc3", features = ["host"] }
borsh = { version = "1.5", features = ["derive"] }
serde = { version = "1.0", features = ["derive"] }
spel-framework-macros = { git = "https://github.com/logos-co/spel.git", tag = "v0.3.0", package = "spel-framework-macros" }
risc0-zkvm = { version = "=3.0.5", default-features = false }

156
programs/twap_oracle/core/src/lib.rs
View File

@ -1,18 +1,166 @@
use borsh::{BorshDeserialize, BorshSerialize};
use nssa_core::account::{AccountId, Data};
use nssa_core::{
account::{AccountId, Data},
program::{PdaSeed, ProgramId},
};
use serde::{Deserialize, Serialize};
use spel_framework_macros::account_type;
/// TWAP Oracle Program Instruction.
#[derive(Debug, Serialize, Deserialize)]
pub enum Instruction {
/// No-op instruction. Does nothing and returns no state changes.
Noop,
/// Creates and initialises a price feed account for a price source and time window.
///
/// Required accounts (in order):
/// 1. Price feed account — uninitialized PDA derived from
/// `compute_price_observations_pda(self_program_id, price_source.account_id,
/// window_duration)`.
/// 2. Price source account — the account whose ID acts as the feed identifier (e.g. an AMM
/// pool account); must be passed with `is_authorized = true` to prove the caller controls
/// it.
/// 3. Clock account — read-only; supplies the initial observation timestamp.
CreatePriceObservations {
/// Initial price tick: `floor(log_{1.0001}(reserve_b / reserve_a))`.
initial_tick: i32,
/// Duration of the TWAP window this feed serves, in milliseconds.
///
/// Together with `OBSERVATIONS_CAPACITY` this determines the minimum sampling interval
/// enforced by `RecordPrice`: `min_interval = window_duration / OBSERVATIONS_CAPACITY`.
/// It is also part of the PDA seed, so each window gets a distinct account.
window_duration: u64,
},
}
// ──────────────────────────────────────────────────────────────────────────────
// Price feed
// ──────────────────────────────────────────────────────────────────────────────
/// Number of entries in each price feed.
///
/// 6 396 is the maximum that fits within the `DATA_MAX_LENGTH = 100 KiB` runtime ceiling.
/// Each [`ObservationEntry`] is 16 bytes (`timestamp` 8 + `tick_cumulative` 8); fixed overhead
/// is 52 bytes (`price_source_id` 32 + `write_index` 4 + `total_entries` 8 +
/// `last_recorded_tick` 4 + Borsh `Vec` length prefix 4), leaving 102 348 bytes for entries:
/// `floor(102 348 / 16) = 6 396`.
///
/// The effective history window depends on the `window_duration` used to derive the feed PDA
/// and the sampling guard: `min_interval = window_duration / OBSERVATIONS_CAPACITY`. A 24 h feed
/// samples every ~13 s; a 7 d feed every ~94 s; a 30 d feed every ~7 min.
pub const OBSERVATIONS_CAPACITY: u32 = 6396;
/// A single price entry written to a [`PriceObservations`].
#[derive(
Debug, Default, PartialEq, Eq, Clone, Serialize, Deserialize, BorshSerialize, BorshDeserialize,
)]
pub struct ObservationEntry {
/// Block timestamp (milliseconds) when this entry was recorded.
pub timestamp: u64,
/// Running sum of `tick × elapsed_ms` up to this entry.
///
/// Grows without bound over time, which is why this is `i64` rather than `i32`.
/// The TWAP over any window `[t1, t2]` is computed as
/// `(tick_cumulative[t2] - tick_cumulative[t1]) / (t2 - t1)`.
pub tick_cumulative: i64,
}
/// Circular price feed of tick observations for a price source and time window.
///
/// Owned by the TWAP oracle as a PDA derived from
/// `compute_price_observations_pda(oracle_program_id, price_source_id, window_duration)`.
/// The window duration is not stored here — it is implicit in the PDA address. Any caller
/// that locates this account already knows the window duration used to derive it.
/// Only the account that controls `price_source_id` (proven via `is_authorized = true` at call
/// time) may append new entries via `RecordPrice`.
#[account_type]
#[derive(Debug, PartialEq, Eq, Clone, Serialize, Deserialize, BorshSerialize, BorshDeserialize)]
pub struct PriceObservations {
/// ID of the price source account this feed is associated with (e.g. an AMM pool).
/// The price feed PDA is derived from this ID and the window duration, so authorization is
/// implicit: whoever controls `price_source_id` is authorized to record prices.
pub price_source_id: AccountId,
/// Index of the *next* slot to write (wraps at `OBSERVATIONS_CAPACITY`).
pub write_index: u32,
/// Total entries ever appended (never resets; used to detect empty/partial-fill state).
pub total_entries: u64,
/// The raw (untruncated) tick from the most recent `RecordTick` call.
///
/// Used by `RecordTick` to compute the tick delta for the next observation:
/// `delta = current_tick - last_recorded_tick`. Stored as the actual tick, not the
/// clamped value, so that each successive delta is computed from the true price position.
pub last_recorded_tick: i32,
/// Circular price entries; always exactly `OBSERVATIONS_CAPACITY` elements.
pub entries: Vec<ObservationEntry>,
}
impl TryFrom<&Data> for PriceObservations {
type Error = std::io::Error;
fn try_from(data: &Data) -> Result<Self, Self::Error> {
Self::try_from_slice(data.as_ref())
}
}
impl From<&PriceObservations> for Data {
fn from(feed: &PriceObservations) -> Self {
let serialized_len =
borsh::object_length(feed).expect("PriceObservations length must be known");
let mut data = Vec::with_capacity(serialized_len);
BorshSerialize::serialize(feed, &mut data).expect("Serialization to Vec should not fail");
Self::try_from(data).expect("PriceObservations encoded data should fit into Data")
}
}
// ──────────────────────────────────────────────────────────────────────────────
// PDA helpers
// ──────────────────────────────────────────────────────────────────────────────
const PRICE_OBSERVATIONS_PDA_SEED: [u8; 32] = [2; 32];
/// Derives the [`AccountId`] for a price source's [`PriceObservations`] PDA.
///
/// The `window_duration` is included in the seed so that each `(price_source, window)` pair
/// maps to a distinct account.
#[must_use]
pub fn compute_price_observations_pda(
oracle_program_id: ProgramId,
price_source_id: AccountId,
window_duration: u64,
) -> AccountId {
AccountId::for_public_pda(
&oracle_program_id,
&compute_price_observations_pda_seed(price_source_id, window_duration),
)
}
/// Derives the [`PdaSeed`] for a price source's [`PriceObservations`].
///
/// Hash input: `price_source_id (32 bytes) || window_duration_le (8 bytes) ||
/// PRICE_OBSERVATIONS_PDA_SEED (32 bytes)`.
#[must_use]
pub fn compute_price_observations_pda_seed(
price_source_id: AccountId,
window_duration: u64,
) -> PdaSeed {
use risc0_zkvm::sha::{Impl, Sha256};
let mut bytes = [0u8; 72];
bytes[..32].copy_from_slice(&price_source_id.to_bytes());
bytes[32..40].copy_from_slice(&window_duration.to_le_bytes());
bytes[40..72].copy_from_slice(&PRICE_OBSERVATIONS_PDA_SEED);
PdaSeed::new(
Impl::hash_bytes(&bytes)
.as_bytes()
.try_into()
.expect("Hash output must be exactly 32 bytes long"),
)
}
/// Canonical oracle price account consumed by LEZ programs.
///
/// Oracle producers own how this account is written; consumers only read and validate it.
/// Oracle producers own how this account is written; consumers only read and
/// validate it. The account shape is intentionally generic so that any oracle
/// type (TWAP, external adaptor, aggregator) can use the same interface.
#[account_type]
#[derive(Debug, PartialEq, Eq, Clone, Serialize, Deserialize, BorshSerialize, BorshDeserialize)]
pub struct OraclePriceAccount {

46
programs/twap_oracle/methods/guest/Cargo.lock generated
View File

@ -550,6 +550,15 @@ dependencies = [
"inout",
]
[[package]]
name = "clock_core"
version = "0.1.0"
source = "git+https://github.com/logos-blockchain/logos-execution-zone.git?tag=v0.2.0-rc3#cf3639d8252040d13b3d4e933feb19b42c76e14a"
dependencies = [
"borsh",
"nssa_core",
]
[[package]]
name = "cobs"
version = "0.3.0"
@ -830,9 +839,9 @@ dependencies = [
[[package]]
name = "displaydoc"
version = "0.2.5"
version = "0.2.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "97369cbbc041bc366949bc74d34658d6cda5621039731c6310521892a3a20ae0"
checksum = "1ac70aa55017e108007fbaf5aa0f54b021c98f92ff8af59d42eda9da96e3dd4f"
dependencies = [
"proc-macro2",
"quote",
@ -1238,9 +1247,9 @@ dependencies = [
[[package]]
name = "http"
version = "1.4.0"
version = "1.4.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e3ba2a386d7f85a81f119ad7498ebe444d2e22c2af0b86b069416ace48b3311a"
checksum = "8be7462df143984c4598a256ef469b251d7d7f9e271135073e78fc535414f3d0"
dependencies = [
"bytes",
"itoa",
@ -1286,9 +1295,9 @@ dependencies = [
[[package]]
name = "hyper"
version = "1.9.0"
version = "1.10.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6299f016b246a94207e63da54dbe807655bf9e00044f73ded42c3ac5305fbcca"
checksum = "eb92f162bf56536459fc83c79b974bb12837acfed43d6bc370a7916d0ae15ecc"
dependencies = [
"atomic-waker",
"bytes",
@ -1638,9 +1647,9 @@ checksum = "b6d2cec3eae94f9f509c767b45932f1ada8350c4bdb85af2fcab4a3c14807981"
[[package]]
name = "libredox"
version = "0.1.16"
version = "0.1.17"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e02f3bb43d335493c96bf3fd3a321600bf6bd07ed34bc64118e9293bdffea46c"
checksum = "f02ab6bace2054fb888a3c16f990117b579d14a3088e472d63c6011fa185c9d3"
dependencies = [
"libc",
]
@ -1691,9 +1700,9 @@ dependencies = [
[[package]]
name = "memchr"
version = "2.8.0"
version = "2.8.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
checksum = "6b947ae49db0d222b1dbc6b113ce7248a3fc3a6ca21b696717bfc000ba4484d8"
[[package]]
name = "merlin"
@ -1960,7 +1969,7 @@ version = "3.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e67ba7e9b2b56446f1d419b1d807906278ffa1a658a8a5d8a39dcb1f5a78614f"
dependencies = [
"toml_edit 0.25.11+spec-1.1.0",
"toml_edit 0.25.12+spec-1.1.0",
]
[[package]]
@ -3193,9 +3202,9 @@ dependencies = [
[[package]]
name = "toml_edit"
version = "0.25.11+spec-1.1.0"
version = "0.25.12+spec-1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0b59c4d22ed448339746c59b905d24568fcbb3ab65a500494f7b8c3e97739f2b"
checksum = "d2153edc6955a6c354fad8f5efd38b6a8769bdccf9fe50f8e1329f81b0baa5d7"
dependencies = [
"indexmap 2.14.0",
"toml_datetime 1.1.1+spec-1.1.0",
@ -3316,6 +3325,7 @@ name = "twap-oracle-guest"
version = "0.1.0"
dependencies = [
"borsh",
"clock_core",
"nssa_core",
"risc0-zkvm",
"serde",
@ -3330,6 +3340,7 @@ version = "0.1.0"
dependencies = [
"borsh",
"nssa_core",
"risc0-zkvm",
"serde",
"spel-framework-macros",
]
@ -3338,6 +3349,7 @@ dependencies = [
name = "twap_oracle_program"
version = "0.1.0"
dependencies = [
"clock_core",
"nssa_core",
"twap_oracle_core",
]
@ -3935,18 +3947,18 @@ dependencies = [
[[package]]
name = "zerocopy"
version = "0.8.48"
version = "0.8.49"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "eed437bf9d6692032087e337407a86f04cd8d6a16a37199ed57949d415bd68e9"
checksum = "bce33a6288fa3f072a8c2c7d0f2fdbb90e28298f0135c1f99b96c3db2efcc60b"
dependencies = [
"zerocopy-derive",
]
[[package]]
name = "zerocopy-derive"
version = "0.8.48"
version = "0.8.49"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "70e3cd084b1788766f53af483dd21f93881ff30d7320490ec3ef7526d203bad4"
checksum = "8fd425244944f4ab65ccff928e7323354c5a018c75838362fdce749dfad2ee1e"
dependencies = [
"proc-macro2",
"quote",

1
programs/twap_oracle/methods/guest/Cargo.toml
View File

@ -12,6 +12,7 @@ path = "src/bin/twap_oracle.rs"
[dependencies]
spel-framework = { git = "https://github.com/logos-co/spel.git", tag = "v0.3.0", package = "spel-framework" }
nssa_core = { git = "https://github.com/logos-blockchain/logos-execution-zone.git", tag = "v0.2.0-rc3" }
clock_core = { git = "https://github.com/logos-blockchain/logos-execution-zone.git", tag = "v0.2.0-rc3" }
risc0-zkvm = { version = "=3.0.5", default-features = false }
twap_oracle_core = { path = "../../core" }
twap_oracle_program = { path = "../..", package = "twap_oracle_program" }

30
programs/twap_oracle/methods/guest/src/bin/twap_oracle.rs
View File

@ -1,5 +1,7 @@
#![cfg_attr(not(test), no_main)]
use nssa_core::account::AccountWithMetadata;
use spel_framework::context::ProgramContext;
use spel_framework::prelude::*;
#[cfg(not(test))]
@ -10,9 +12,31 @@ mod twap_oracle {
#[allow(unused_imports)]
use super::*;
/// No-op instruction. Does nothing and returns no state changes.
/// Creates and initialises a price observations account for a price source and time window.
///
/// Expected accounts:
/// 1. `price_observations` — uninitialized PDA owned by this oracle program.
/// 2. `price_source` — account the caller controls (proven via `is_authorized = true`);
/// its ID is used as the observations identifier and to derive the price observations PDA.
/// 3. `clock` — read-only LEZ clock account (any cadence).
#[instruction]
pub fn noop() -> SpelResult {
Ok(spel_framework::SpelOutput::execute(twap_oracle_program::noop::noop(), vec![]))
pub fn create_price_observations(
ctx: ProgramContext,
price_observations: AccountWithMetadata,
price_source: AccountWithMetadata,
clock: AccountWithMetadata,
initial_tick: i32,
window_duration: u64,
) -> SpelResult {
let post_states =
twap_oracle_program::create_price_observations::create_price_observations(
price_observations,
price_source,
clock,
initial_tick,
window_duration,
ctx.self_program_id,
);
Ok(spel_framework::SpelOutput::execute(post_states, vec![]))
}
}

388
programs/twap_oracle/src/create_price_observations.rs Normal file
View File

@ -0,0 +1,388 @@
use clock_core::ClockAccountData;
use nssa_core::{
account::{Account, AccountWithMetadata, Data},
program::{AccountPostState, Claim, ProgramId},
};
use twap_oracle_core::{
compute_price_observations_pda, compute_price_observations_pda_seed, ObservationEntry,
PriceObservations, OBSERVATIONS_CAPACITY,
};
/// Creates and initialises a [`PriceObservations`] for a price source account and time window.
///
/// Authorization is implicit in the PDA relationship: the price observations account is derived
/// from `price_source.account_id` and `window_duration`, so whoever controls the price source
/// controls the observations account.
///
/// # Panics
/// Panics if:
/// - `price_observations.account_id` does not match
/// `compute_price_observations_pda(oracle_program_id, price_source.account_id, window_duration)`.
/// - `price_observations.account` is not the default (already initialised).
/// - `price_source.is_authorized` is false (caller does not control the price source account).
pub fn create_price_observations(
price_observations: AccountWithMetadata,
price_source: AccountWithMetadata,
clock: AccountWithMetadata,
initial_tick: i32,
window_duration: u64,
oracle_program_id: ProgramId,
) -> Vec<AccountPostState> {
let price_source_id = price_source.account_id;
assert_eq!(
price_observations.account_id,
compute_price_observations_pda(oracle_program_id, price_source_id, window_duration),
"CreatePriceObservations: price observations account ID does not match expected PDA"
);
assert_eq!(
price_observations.account,
Account::default(),
"CreatePriceObservations: price observations account must be uninitialized"
);
assert!(
price_source.is_authorized,
"CreatePriceObservations: price source account must be authorized (caller must control it via a PDA)"
);
let clock_data = ClockAccountData::from_bytes(clock.account.data.as_ref());
let capacity =
usize::try_from(OBSERVATIONS_CAPACITY).expect("OBSERVATIONS_CAPACITY fits in usize");
let mut entries = vec![ObservationEntry::default(); capacity];
*entries
.first_mut()
.expect("OBSERVATIONS_CAPACITY is non-zero") = ObservationEntry {
timestamp: clock_data.timestamp,
tick_cumulative: 0,
};
let observations = PriceObservations {
price_source_id,
write_index: 1,
total_entries: 1,
last_recorded_tick: initial_tick,
entries,
};
let mut price_observations_post = price_observations.account.clone();
price_observations_post.data = Data::from(&observations);
vec![
AccountPostState::new_claimed(
price_observations_post,
Claim::Pda(compute_price_observations_pda_seed(
price_source_id,
window_duration,
)),
),
AccountPostState::new(price_source.account.clone()),
AccountPostState::new(clock.account.clone()),
]
}
#[cfg(test)]
mod tests {
use nssa_core::account::{AccountId, Nonce};
use super::*;
const ORACLE_PROGRAM_ID: ProgramId = [77u32; 8];
const CLOCK_PROGRAM_ID: ProgramId = [88u32; 8];
/// 24-hour window in milliseconds, used as the default window for tests.
const WINDOW_24H: u64 = 24 * 60 * 60 * 1_000;
fn price_source_id() -> AccountId {
AccountId::new([1u8; 32])
}
fn clock_account_with_timestamp(timestamp: u64) -> AccountWithMetadata {
let data = ClockAccountData {
block_id: 0,
timestamp,
}
.to_bytes();
AccountWithMetadata {
account: Account {
program_owner: CLOCK_PROGRAM_ID,
balance: 0,
data: Data::try_from(data).expect("ClockAccountData fits in Data"),
nonce: Nonce(0),
},
is_authorized: false,
account_id: AccountId::new([99u8; 32]),
}
}
fn price_source_authorized() -> AccountWithMetadata {
AccountWithMetadata {
account: Account {
program_owner: [42u32; 8],
balance: 0,
data: Data::default(),
nonce: Nonce(0),
},
is_authorized: true,
account_id: price_source_id(),
}
}
fn price_observations_uninit() -> AccountWithMetadata {
AccountWithMetadata {
account: Account::default(),
is_authorized: false,
account_id: compute_price_observations_pda(
ORACLE_PROGRAM_ID,
price_source_id(),
WINDOW_24H,
),
}
}
// ── happy path ────────────────────────────────────────────────────────────
#[test]
fn returns_three_post_states() {
let post_states = create_price_observations(
price_observations_uninit(),
price_source_authorized(),
clock_account_with_timestamp(0),
0,
WINDOW_24H,
ORACLE_PROGRAM_ID,
);
assert_eq!(post_states.len(), 3);
}
#[test]
fn price_observations_post_state_is_pda_claimed() {
let post_states = create_price_observations(
price_observations_uninit(),
price_source_authorized(),
clock_account_with_timestamp(0),
0,
WINDOW_24H,
ORACLE_PROGRAM_ID,
);
assert_eq!(
post_states[0].required_claim(),
Some(Claim::Pda(compute_price_observations_pda_seed(
price_source_id(),
WINDOW_24H
)))
);
}
#[test]
fn price_source_and_clock_post_states_are_unchanged() {
let price_source = price_source_authorized();
let clock = clock_account_with_timestamp(42_000);
let post_states = create_price_observations(
price_observations_uninit(),
price_source.clone(),
clock.clone(),
10,
WINDOW_24H,
ORACLE_PROGRAM_ID,
);
assert_eq!(*post_states[1].account(), price_source.account);
assert_eq!(*post_states[2].account(), clock.account);
}
#[test]
fn initial_observation_has_zero_cumulative_and_correct_timestamp() {
let timestamp = 123_456_789u64;
let post_states = create_price_observations(
price_observations_uninit(),
price_source_authorized(),
clock_account_with_timestamp(timestamp),
-42,
WINDOW_24H,
ORACLE_PROGRAM_ID,
);
let feed = PriceObservations::try_from(&post_states[0].account().data)
.expect("post state must contain a valid PriceObservations");
assert_eq!(feed.entries[0].tick_cumulative, 0);
assert_eq!(feed.entries[0].timestamp, timestamp);
}
#[test]
fn initial_tick_stored_as_last_recorded_tick() {
let initial_tick = -42i32;
let post_states = create_price_observations(
price_observations_uninit(),
price_source_authorized(),
clock_account_with_timestamp(0),
initial_tick,
WINDOW_24H,
ORACLE_PROGRAM_ID,
);
let feed = PriceObservations::try_from(&post_states[0].account().data)
.expect("post state must contain a valid PriceObservations");
assert_eq!(feed.last_recorded_tick, initial_tick);
}
#[test]
fn write_index_and_total_entries_start_at_one() {
let post_states = create_price_observations(
price_observations_uninit(),
price_source_authorized(),
clock_account_with_timestamp(0),
0,
WINDOW_24H,
ORACLE_PROGRAM_ID,
);
let feed = PriceObservations::try_from(&post_states[0].account().data)
.expect("post state must contain a valid PriceObservations");
assert_eq!(feed.write_index, 1);
assert_eq!(feed.total_entries, 1);
}
#[test]
fn remaining_entries_are_default() {
let post_states = create_price_observations(
price_observations_uninit(),
price_source_authorized(),
clock_account_with_timestamp(0),
0,
WINDOW_24H,
ORACLE_PROGRAM_ID,
);
let feed = PriceObservations::try_from(&post_states[0].account().data)
.expect("post state must contain a valid PriceObservations");
assert_eq!(
feed.entries.len(),
usize::try_from(OBSERVATIONS_CAPACITY).expect("OBSERVATIONS_CAPACITY fits in usize")
);
assert!(feed.entries[1..]
.iter()
.all(|e| *e == ObservationEntry::default()));
}
#[test]
fn price_source_id_stored_correctly() {
let post_states = create_price_observations(
price_observations_uninit(),
price_source_authorized(),
clock_account_with_timestamp(0),
0,
WINDOW_24H,
ORACLE_PROGRAM_ID,
);
let feed = PriceObservations::try_from(&post_states[0].account().data)
.expect("post state must contain a valid PriceObservations");
assert_eq!(feed.price_source_id, price_source_id());
}
#[test]
fn different_windows_produce_distinct_pdas() {
let window_24h = 24 * 60 * 60 * 1_000u64;
let window_7d = 7 * 24 * 60 * 60 * 1_000u64;
assert_ne!(
compute_price_observations_pda(ORACLE_PROGRAM_ID, price_source_id(), window_24h),
compute_price_observations_pda(ORACLE_PROGRAM_ID, price_source_id(), window_7d),
);
}
#[test]
fn positive_and_negative_initial_ticks_stored_as_last_recorded_tick() {
for tick in [i32::MIN, -1, 0, 1, i32::MAX] {
let post_states = create_price_observations(
price_observations_uninit(),
price_source_authorized(),
clock_account_with_timestamp(0),
tick,
WINDOW_24H,
ORACLE_PROGRAM_ID,
);
let feed = PriceObservations::try_from(&post_states[0].account().data)
.expect("post state must contain a valid PriceObservations");
assert_eq!(feed.last_recorded_tick, tick);
}
}
// ── precondition violations ───────────────────────────────────────────────
#[test]
#[should_panic(expected = "price observations account ID does not match expected PDA")]
fn wrong_price_feed_account_id_panics() {
let mut wrong_feed = price_observations_uninit();
wrong_feed.account_id = AccountId::new([0u8; 32]);
create_price_observations(
wrong_feed,
price_source_authorized(),
clock_account_with_timestamp(0),
0,
WINDOW_24H,
ORACLE_PROGRAM_ID,
);
}
/// An attacker who controls their own price source cannot register an observations account
/// that claims to be derived from a *different* (victim's) price source.
///
/// The PDA derivation ties the observations account to the price source that was passed: if
/// the caller supplies their own authorized source but the victim's observations account ID,
/// the PDA check will fail because the computed PDA (from attacker's source) won't match.
#[test]
#[should_panic(expected = "price observations account ID does not match expected PDA")]
fn cannot_register_observations_for_another_price_source() {
let victim_source_id = AccountId::new([2u8; 32]);
// The attacker passes the victim's observations PDA as the target account…
let victim_observations_pda =
compute_price_observations_pda(ORACLE_PROGRAM_ID, victim_source_id, WINDOW_24H);
let mut attacker_observations = price_observations_uninit();
attacker_observations.account_id = victim_observations_pda;
// …but only controls their own price source (price_source_id = [1u8; 32]).
create_price_observations(
attacker_observations,
price_source_authorized(),
clock_account_with_timestamp(0),
0,
WINDOW_24H,
ORACLE_PROGRAM_ID,
);
}
#[test]
#[should_panic(expected = "price observations account must be uninitialized")]
fn already_initialized_price_feed_panics() {
let mut initialized_feed = price_observations_uninit();
initialized_feed.account.data = Data::try_from(vec![1u8; 10]).expect("fits in Data");
create_price_observations(
initialized_feed,
price_source_authorized(),
clock_account_with_timestamp(0),
0,
WINDOW_24H,
ORACLE_PROGRAM_ID,
);
}
#[test]
#[should_panic(expected = "price source account must be authorized")]
fn unauthorized_price_source_panics() {
let mut unauthorized = price_source_authorized();
unauthorized.is_authorized = false;
create_price_observations(
price_observations_uninit(),
unauthorized,
clock_account_with_timestamp(0),
0,
WINDOW_24H,
ORACLE_PROGRAM_ID,
);
}
}

2
programs/twap_oracle/src/lib.rs
View File

@ -2,4 +2,4 @@
pub use twap_oracle_core as core;
pub mod noop;
pub mod create_price_observations;

5
programs/twap_oracle/src/noop.rs
View File

@ -1,5 +0,0 @@
use nssa_core::program::AccountPostState;
pub fn noop() -> Vec<AccountPostState> {
vec![]
}