Daily Audit Report

Date: February 14, 2026 Commit: 7ed7287 Branch: main CI Status: Passing

Summary

V2 Contract Suite

This audit covers the complete V2 smart contract rewrite:

8-Layer Security Stack Results

Layer 1: Static Analysis (Slither)

Status: PASSING
High: 0
Medium: 0
Low: 0
Informational: Lint warnings only

Layer 2: Property Fuzzing (Echidna)

Invariants Verified:

• echidna_fee_exactly_2_percent
• echidna_locked_is_98_percent
• echidna_balance_conservation
• echidna_status_transitions_valid
• echidna_score_starts_zero
• echidna_completion_adds_one
• echidna_dispute_deltas_correct
• echidna_max_job_tier_correct
• Plus 13 more…

Layer 3: Fuzz Testing (Foundry)

Key Fuzz Tests:

• testFuzz_feeCalculation — 2% fee exact for all amounts
• testFuzz_maxJobValueTiers — Tier boundaries correct
• testFuzz_completionAddsOne — +1 to both parties
• testFuzz_disputeOutcomes — All 3 outcomes tested
• testFuzz_abandonmentRefund — Full refund on abandon
• testFuzz_escrowCreation — Valid escrow creation
• testFuzz_maxJobEnforcement — Score→maxJob enforced

Layer 4: Differential Fuzzing

ScoreSpecV2 vs AbbababaScoreV2: 100% match
├── Tier boundaries: Identical
├── Completion deltas: Identical
├── Dispute deltas: Identical
├── Fee calculation: Identical
└── Monotonicity: Verified

Layer 5: Symbolic Execution (Halmos)

Key Proofs:

• check_feeIs2Percent — Fee is exactly 200 BPS
• check_feeConservation — fee + locked = original
• check_tierMonotonicity — Higher score → higher limit
• check_completionAlwaysAddsOne — +1 for both always
• check_disputeBuyerWins — Buyer +1, seller -3
• check_splitMustSumTo100 — Valid split validation
• check_resolverRoleConstant — Role hash correct

Layer 6: Formal Verification (Certora)

Certora Rules Verified:

• feeIs2PercentRule — PLATFORM_FEE_BPS == 200
• feeCalculationCorrect — Math matches spec
• completionPointsConstantRule — COMPLETION_POINTS == 1
• abandonmentPenaltyConstantRule — ABANDONMENT_PENALTY == -5
• tierBoundariesRule — All 11 tiers correct
• resolverRoleConstantRule — Role constant correct
• defaultAdminRoleZeroRule — Admin role is 0x00

Layer 7: Mutation Testing (Gambit)

Key Mutations Caught:

• COMPLETION_POINTS = 1 → 0 — Killed
• PLATFORM_FEE_BPS = 200 → 100 — Killed
• ABANDONMENT_PENALTY = -5 → -4 — Killed
• Tier boundary off-by-one — Killed
• Split sum validation removed — Killed

Layer 8: Symbolic Execution (Mythril)

V2 Economic Model Verification

The 2% flat fee model was exhaustively tested:

Test Infrastructure

Files Created/Updated

Commands

# Run full audit suite
./scripts/run-audit.sh full
 
# Individual tools
forge test --match-path "test/foundry/*.t.sol" --fuzz-runs 500000
echidna test/echidna/EchidnaScoreV2.sol --contract EchidnaScoreV2Test --test-limit 5000000
halmos --contract HalmosScoreV2Test --forge-build-out foundry-out
certoraRun certora/conf/ScoreV2.conf
gambit mutate --json gambit-v2.json

Running Totals

V1 → V2 Migration

V1 contracts and tests have been archived:

contracts/archive/
├── AbbababaEscrowV1.sol
├── AbbababaScoreV1.sol
├── AbbababaResolverV1.sol
├── ReviewerPaymentV1.sol
├── echidna/
├── foundry/
├── halmos/
└── medusa/

Deployment Readiness

Pre-Mainnet Checklist

• 8-layer security stack complete
• 29 Foundry fuzz tests @ 500K runs
• 138/138 mutants killed (100%)
• 62 Halmos symbolic proofs
• Certora formal verification (3 contracts)
• Echidna invariants @ 5M iterations
• Mythril clean (ScoreV2, ResolverV2)
• 2% fee model verified
• All tier boundaries verified
• Score deltas verified (+1, -3, -5)
• Storage gaps present (50 slots)
• UUPS upgrade pattern
• Access control verified
• External audit (optional)

Commits