diff --git a/.gitignore b/.gitignore index 3d04e08..1ba2c49 100644 --- a/.gitignore +++ b/.gitignore @@ -1,4 +1,9 @@ /target +fuzz/target +fuzz/artifacts +fuzz/corpus +fuzz/crashes +fuzz/coverage .TODO .env diff --git a/README.md b/README.md index 313f5e7..89fd7e1 100644 --- a/README.md +++ b/README.md @@ -120,7 +120,15 @@ make lint # cargo clippy --all-targets --all-features -D warnings ### Fuzz (requires nightly + cargo-fuzz) ```bash -make fuzz # runs fuzz_bid and fuzz_envelope +make fuzz # runs fuzz_bid and fuzz_envelope (~30s each) +make fuzz-bid # bid harness only (~30s) +make fuzz-envelope # envelope harness only (~30s) +``` +Fuzz setup: +```bash +rustup toolchain install nightly +cargo install cargo-fuzz +cd fuzz && cargo +nightly fuzz run fuzz_bid ``` ### Examples & CLI diff --git a/fuzz/Cargo.lock b/fuzz/Cargo.lock new file mode 100644 index 0000000..1fafb87 --- /dev/null +++ b/fuzz/Cargo.lock @@ -0,0 +1,1265 @@ +# This file is automatically @generated by Cargo. +# It is not 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= "1" +eip-7732 = { path = ".." } + +[build-dependencies] +cc = "1" + +[workspace] +members = ["."] +resolver = "2" + +[[bin]] +name = "fuzz_bid" +path = "fuzz_targets/fuzz_bid.rs" +test = false +doc = false + +[[bin]] +name = "fuzz_envelope" +path = "fuzz_targets/fuzz_envelope.rs" +test = false +doc = false diff --git a/fuzz/fuzz_targets/fuzz_bid.rs b/fuzz/fuzz_targets/fuzz_bid.rs new file mode 100644 index 0000000..47ab81a --- /dev/null +++ b/fuzz/fuzz_targets/fuzz_bid.rs @@ -0,0 +1,89 @@ +#![no_main] + +use arbitrary::Arbitrary; +use eip_7732::beacon_chain::{ + containers::{ExecutionPayloadBid, SignedExecutionPayloadBid}, + process_payload_bid::{process_execution_payload_bid, BeaconStateMut}, + types::{BLSPubkey, BuilderIndex, Gwei, KZGCommitment, Slot}, +}; +use libfuzzer_sys::fuzz_target; +use std::collections::HashMap; + +#[derive(Arbitrary, Debug)] +struct Input { + parent_hash: [u8; 32], + parent_root: [u8; 32], + block_hash: [u8; 32], + prev_randao: [u8; 32], + fee_recipient: [u8; 20], + builder_index: BuilderIndex, + slot: Slot, + value: Gwei, + execution_payment: Gwei, + blobs: Vec, + signature: [u8; 96], +} + +struct MockState { + balances: HashMap, + pubkeys: HashMap, + slot: Slot, + latest: [u8; 32], +} + +impl BeaconStateMut for MockState { + fn builder_balance(&self, index: BuilderIndex) -> Option { + self.balances.get(&index).copied() + } + fn builder_pubkey(&self, index: BuilderIndex) -> Option { + self.pubkeys.get(&index).copied() + } + fn deduct_builder_balance(&mut self, index: BuilderIndex, amount: Gwei) { + if let Some(b) = self.balances.get_mut(&index) { + *b = b.saturating_sub(amount); + } + } + fn push_pending_payment( + &mut self, + _payment: eip_7732::beacon_chain::containers::BuilderPendingPayment, + ) { + } + fn current_slot(&self) -> Slot { + self.slot + } + fn latest_block_hash(&self) -> [u8; 32] { + self.latest + } +} + +fuzz_target!(|input: Input| { + let bid = SignedExecutionPayloadBid { + message: ExecutionPayloadBid { + parent_block_hash: input.parent_hash, + parent_block_root: input.parent_root, + block_hash: input.block_hash, + prev_randao: input.prev_randao, + fee_recipient: input.fee_recipient, + gas_limit: 30_000_000, + builder_index: input.builder_index, + slot: input.slot, + value: input.value, + execution_payment: input.execution_payment, + blob_kzg_commitments: input.blobs.into_iter().take(8).collect(), + }, + signature: input.signature, + }; + + let mut state = MockState { + balances: HashMap::new(), + pubkeys: HashMap::new(), + slot: input.slot, + latest: bid.message.parent_block_hash, + }; + state + .balances + .insert(bid.message.builder_index, input.value.saturating_add(1)); + state.pubkeys.insert(bid.message.builder_index, [0u8; 48]); + + let _ = process_execution_payload_bid(&mut state, &bid); +}); diff --git a/fuzz/fuzz_targets/fuzz_envelope.rs b/fuzz/fuzz_targets/fuzz_envelope.rs new file mode 100644 index 0000000..c3145fc --- /dev/null +++ b/fuzz/fuzz_targets/fuzz_envelope.rs @@ -0,0 +1,76 @@ +#![no_main] + +use arbitrary::Arbitrary; +use eip_7732::{ + beacon_chain::containers::{ExecutionPayload, Withdrawal}, + beacon_chain::types::{BuilderIndex, ExecutionAddress, Hash32, Slot, ValidatorIndex}, + builder::envelope::{construct_envelope, EnvelopeParams}, +}; +use libfuzzer_sys::fuzz_target; + +#[derive(Arbitrary, Debug)] +struct WithdrawalInput { + index: u64, + validator_index: ValidatorIndex, + address: ExecutionAddress, + amount: u64, +} + +#[derive(Arbitrary, Debug)] +struct Input { + block_hash: Hash32, + parent_hash: Hash32, + fee_recipient: ExecutionAddress, + gas_used: u64, + gas_limit: u64, + timestamp: u64, + extra_data: Vec, + transactions: Vec>, + withdrawals: Vec, + execution_requests: Vec, + builder_index: BuilderIndex, + beacon_block_root: Hash32, + slot: Slot, + post_state_root: Hash32, +} + +fn dummy_signer(_: &[u8]) -> Result<[u8; 96], String> { Ok([0u8; 96]) } + +fuzz_target!(|input: Input| { + let withdrawals: Vec = input + .withdrawals + .into_iter() + .map(|w| Withdrawal { + index: w.index, + validator_index: w.validator_index, + address: w.address, + amount: w.amount, + }) + .collect(); + + let payload = ExecutionPayload { + block_hash: input.block_hash, + parent_hash: input.parent_hash, + fee_recipient: input.fee_recipient, + gas_used: input.gas_used, + gas_limit: input.gas_limit.max(1), + timestamp: input.timestamp, + extra_data: input.extra_data, + transactions: input.transactions, + withdrawals: withdrawals.clone(), + }; + + // Keep the envelope internally consistent to exercise downstream logic. + let params = EnvelopeParams { + payload, + execution_requests: input.execution_requests, + builder_index: input.builder_index, + beacon_block_root: input.beacon_block_root, + slot: input.slot, + post_state_root: input.post_state_root, + committed_hash: input.block_hash, + expected_withdrawals: withdrawals, + }; + + let _ = construct_envelope(¶ms, dummy_signer); +}); diff --git a/makefile b/makefile index ee0ea24..d47dd7d 100644 --- a/makefile +++ b/makefile @@ -1,4 +1,4 @@ -.PHONY: build test lint fmt check clean sim-builder sim-ptc cli docs +.PHONY: build test lint fmt check clean sim-builder sim-ptc cli docs fuzz fuzz-bid fuzz-envelope # ─── Build ──────────────────────────────────────────────────────────────────── build: @@ -14,9 +14,13 @@ test-unit: test-integration: cargo test --test integration -fuzz: - cargo +nightly fuzz run fuzz_bid - cargo +nightly fuzz run fuzz_envelope +fuzz: fuzz-bid fuzz-envelope + +fuzz-bid: + cd fuzz && cargo +nightly fuzz run fuzz_bid -- -max_total_time=30 + +fuzz-envelope: + cd fuzz && cargo +nightly fuzz run fuzz_envelope -- -max_total_time=30 # ─── Quality ────────────────────────────────────────────────────────────────── lint: @@ -51,4 +55,4 @@ docs: # ─── Clean ──────────────────────────────────────────────────────────────────── clean: - cargo clean \ No newline at end of file + cargo clean