feat(node-tests): add proptest fuzzing support for transactions and blocks#81
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init4samwise wants to merge 1 commit intomainfrom
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feat(node-tests): add proptest fuzzing support for transactions and blocks#81init4samwise wants to merge 1 commit intomainfrom
init4samwise wants to merge 1 commit intomainfrom
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…locks Add structurally aware fuzzing infrastructure using proptest crate: ## Fuzzing Strategies (src/fuzz.rs) - Primitive strategies: arb_address, arb_b256, arb_u256, arb_tx_kind - Transaction strategies for all types: Legacy, EIP-1559, EIP-2930, EIP-4844 - Block strategies: arb_header, arb_block_body, arb_block - Configurable via PROPTEST_CASES env var (default: 64) ## Property-Based Tests (tests/fuzz.rs) - RLP encoding roundtrip tests for all transaction types - Transaction type preservation verification - Block header sealing/unsealing roundtrips - Block body transaction count validation - Complete block construction tests - Zenith coder compatibility tests - RLP encoding roundtrips for headers This enables structurally aware fuzzing for integration tests, catching edge cases and invariant violations through randomized inputs. Closes ENG-301
prestwich
requested changes
Feb 16, 2026
| // ── Primitive strategies ──────────────────────────────────────────── | ||
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| /// Strategy for an arbitrary [`Address`]. | ||
| pub fn arb_address() -> impl Strategy<Value = Address> { |
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this already exists in alloy with the arbitrary feature
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Summary
Add structurally aware fuzzing infrastructure using proptest crate for use in integration tests.
What Changed
Fuzzing Strategies (
src/fuzz.rs)arb_address,arb_b256,arb_u256,arb_tx_kind,arb_input_bytes,arb_access_listarb_tx_legacy- Legacy (pre-EIP-2718) transactionsarb_tx_eip1559- EIP-1559 fee market transactionsarb_tx_eip2930- EIP-2930 access list transactionsarb_tx_eip4844- EIP-4844 blob transactionsarb_transaction- Any supported transaction variantarb_header- Block headersarb_block_body- Block bodies (with 0-8 transactions)arb_block- Complete blocks (header + body)PROPTEST_CASESenv var (default: 64)Property-Based Tests (
tests/fuzz.rs)Why
Enables structurally aware fuzzing for integration tests, catching edge cases and invariant violations through randomized inputs. This satisfies the requirements for ENG-301.
Testing
Run fuzz tests with:
Closes ENG-301