# MEV Bot - Comprehensive 100-Point Security & Production Audit **Date**: 2025-10-26 **Version**: 1.0 **Auditor**: Claude Code **Project**: MEV Beta (mev-beta + Mev-Alpha) **Status**: In Progress --- ## Audit Scoring System - ✅ **PASS**: Meets requirement fully - ⚠️ **WARN**: Partial compliance, needs attention - ❌ **FAIL**: Does not meet requirement, critical issue - 🔄 **IN PROGRESS**: Currently being addressed - ⏸️ **NOT APPLICABLE**: Not relevant to current deployment **Target Score**: 90/100 (90% for production readiness) --- ## Section 1: Smart Contract Security (Solidity) - 25 Points ### 1.1 Access Control (5 points) - [ ] **1.1.1** All sensitive functions have appropriate access modifiers (onlyOwner, onlyAuthorized) - Location: `src/core/ArbitrageExecutor.sol:25-28`, `src/core/BaseFlashSwapper.sol:51-54` - Status: ⏸️ Requires manual verification - Action: Review all external/public functions - [ ] **1.1.2** Owner privileges can be transferred securely (2-step ownership transfer) - Location: Uses OpenZeppelin Ownable2Step pattern - Status: ⏸️ Check if Ownable2Step is used - Action: Verify inheritance chain - [ ] **1.1.3** Critical operations have multi-signature requirements or timelocks - Location: `src/core/ArbitrageExecutor.sol:288` (EMERGENCY_TIMELOCK = 48 hours) - Status: ⏸️ Verify timelock implementation - Action: Test emergency withdrawal timelock - [ ] **1.1.4** No functions allow arbitrary external calls without validation - Location: `src/core/ArbitrageExecutor.sol:193-223` (swap execution with selector validation) - Status: ⏸️ Requires code review - Action: Audit all `.call()` usage - [ ] **1.1.5** Role-based access control properly implemented for multi-user scenarios - Location: `authorizedCallers`, `authorizedDEXes` mappings - Status: ⏸️ Verify authorization checks - Action: Test unauthorized access attempts ### 1.2 Reentrancy Protection (5 points) - [ ] **1.2.1** All state-changing external functions use ReentrancyGuard - Location: `ArbitrageExecutor`, `BaseFlashSwapper` inherit `ReentrancyGuard` - Status: ⏸️ Verify all external functions - Action: Grep for `external.*{` and check modifiers - [ ] **1.2.2** Checks-Effects-Interactions pattern followed consistently - Location: All swap execution functions - Status: ⏸️ Manual code review required - Action: Review state changes before external calls - [ ] **1.2.3** No recursive external calls to untrusted contracts - Location: DEX interactions - Status: ⏸️ Review call flow - Action: Map all external call chains - [ ] **1.2.4** Flash loan callback validation prevents unauthorized callbacks - Location: `src/dex/UniswapV3FlashSwapper.sol:87-149` (uniswapV3FlashCallback) - Status: ⏸️ Verify pool validation - Action: Test with fake pool contracts - [ ] **1.2.5** Reentrancy protection doesn't have gas inefficiencies - Location: OpenZeppelin ReentrancyGuard implementation - Status: ⏸️ Gas profiling needed - Action: Benchmark with/without guard ### 1.3 Input Validation (5 points) - [ ] **1.3.1** All array lengths are validated before iteration - Location: `src/core/ArbitrageExecutor.sol:100-102` (token/pool length checks) - Status: ⏸️ Check all array operations - Action: Search for `.length` usage - [ ] **1.3.2** Address parameters validated against zero address - Location: Multiple locations (constructor validation) - Status: ⏸️ Comprehensive check needed - Action: Grep for `address.*{` and verify checks - [ ] **1.3.3** Numeric parameters have range validation (min/max bounds) - Location: `src/dex/UniswapV3FlashSwapper.sol:62` (uint128 max check) - Status: ⏸️ Check all numeric inputs - Action: Review for overflow/underflow risks - [ ] **1.3.4** Function selector validation prevents arbitrary function calls - Location: `src/core/ArbitrageExecutor.sol:42-59` (allowedSwapSelectors) - Status: ⏸️ Verify whitelist completeness - Action: Test with invalid selectors - [ ] **1.3.5** Deadline parameters prevent stale transaction execution - Location: Multiple functions use `deadline` parameter - Status: ⏸️ Verify enforcement - Action: Test with expired deadlines ### 1.4 Integer Arithmetic Safety (5 points) - [ ] **1.4.1** Solidity 0.8.x automatic overflow protection utilized - Location: `pragma solidity ^0.8.19` - Status: ✅ **PASS** - Using 0.8.19 - Action: None required - [ ] **1.4.2** Unchecked blocks only used where overflow is impossible - Location: Search for `unchecked {` blocks - Status: ⏸️ Review each unchecked block - Action: Justify each unchecked usage - [ ] **1.4.3** Division by zero checks in place - Location: DEXMath library, price calculations - Status: ⏸️ Check all division operations - Action: Test with zero denominators - [ ] **1.4.4** Precision loss in calculations minimized - Location: Price calculations, liquidity math - Status: ⏸️ Review calculation order - Action: Test with extreme values - [ ] **1.4.5** No unsafe type conversions (e.g., uint256 to uint128) - Location: Flash swap amount validations - Status: ⏸️ Audit all type casts - Action: Search for `uint.*\(.*\)` patterns ### 1.5 External Dependencies (5 points) - [ ] **1.5.1** OpenZeppelin contracts at latest stable version - Location: Check package dependencies - Status: ⏸️ Verify versions - Action: `forge update` and check versions - [ ] **1.5.2** Uniswap V2/V3 interfaces match deployed contracts - Location: Interface definitions - Status: ⏸️ Compare with on-chain ABIs - Action: Fetch ABIs from Arbiscan and compare - [ ] **1.5.3** No outdated or vulnerable dependencies - Location: All imports - Status: ⏸️ Security scan needed - Action: Run `forge audit` / `slither` - [ ] **1.5.4** Custom interfaces properly implement expected standards - Location: IArbitrage, IFlashSwapper - Status: ⏸️ Verify ERC165 compliance - Action: Test supportsInterface() - [ ] **1.5.5** DEX protocol assumptions documented and validated - Location: README, inline comments - Status: ⏸️ Documentation review - Action: Document all DEX assumptions --- ## Section 2: Go Code Security & Quality - 20 Points ### 2.1 Input Validation (4 points) - [ ] **2.1.1** All RPC responses validated before processing - Location: `pkg/arbitrum/abi_decoder.go`, `pkg/uniswap/contracts.go` - Status: ⏸️ Review validation logic - Action: Test with malformed RPC responses - [ ] **2.1.2** Transaction data validated before signing - Location: Transaction building logic - Status: ⏸️ Review signing workflow - Action: Test with invalid transaction data - [ ] **2.1.3** Configuration files validated on startup - Location: `internal/config` - Status: ⏸️ Check config validation - Action: Test with invalid config files - [ ] **2.1.4** Environment variables sanitized and validated - Location: Config loading - Status: ⏸️ Review env var handling - Action: Test with missing/invalid env vars ### 2.2 Error Handling (4 points) - [ ] **2.2.1** All errors properly wrapped with context - Location: Throughout codebase - Status: ⏸️ Audit error handling - Action: Search for `return err` without wrapping - [ ] **2.2.2** Panics are recovered and logged appropriately - Location: Main goroutines - Status: ⏸️ Check panic recovery - Action: Search for `defer recover()` - [ ] **2.2.3** Critical errors trigger alerts/notifications - Location: Error handling logic - Status: ⏸️ Review alerting system - Action: Verify alert configuration - [ ] **2.2.4** Retry logic with exponential backoff for transient failures - Location: RPC client, transaction submission - Status: ⏸️ Review retry mechanisms - Action: Test with intermittent failures ### 2.3 Concurrency Safety (4 points) - [ ] **2.3.1** No data races (verified with -race flag) - Location: All concurrent code - Status: ⏸️ Run race detector - Action: `go test -race ./...` - [ ] **2.3.2** Proper mutex usage for shared state - Location: Cache implementations, shared maps - Status: ⏸️ Review mutex patterns - Action: Audit all `sync.Mutex` usage - [ ] **2.3.3** Channels used correctly (no deadlocks) - Location: Event processing pipelines - Status: ⏸️ Test channel operations - Action: Stress test with high load - [ ] **2.3.4** Goroutine leaks prevented (proper cleanup) - Location: All goroutine launches - Status: ⏸️ Profile goroutines - Action: Use pprof to detect leaks ### 2.4 Cryptographic Security (4 points) - [ ] **2.4.1** Private keys never logged or exposed - Location: All logging statements - Status: ⏸️ Audit logs - Action: Grep logs for sensitive data - [ ] **2.4.2** Secure key storage (encrypted, not in code) - Location: Key management - Status: ⏸️ Review key storage - Action: Verify encryption at rest - [ ] **2.4.3** Random number generation uses crypto/rand - Location: Nonce generation, if any - Status: ⏸️ Check RNG usage - Action: Search for `math/rand` usage - [ ] **2.4.4** Transaction signing uses proper nonce management - Location: Transaction builder - Status: ⏸️ Review nonce tracking - Action: Test concurrent transaction signing ### 2.5 Resource Management (4 points) - [ ] **2.5.1** Database connections properly pooled and closed - Location: Database client initialization - Status: ⏸️ Review connection management - Action: Check for connection leaks - [ ] **2.5.2** File descriptors closed after use - Location: All file operations - Status: ⏸️ Audit file handling - Action: Check `defer file.Close()` usage - [ ] **2.5.3** Memory usage monitored and bounded - Location: Large data structures, caches - Status: ⏸️ Profile memory usage - Action: Run `go tool pprof` heap analysis - [ ] **2.5.4** Graceful shutdown implemented for all services - Location: Main application, signal handling - Status: ⏸️ Test shutdown sequence - Action: Send SIGTERM and verify cleanup --- ## Section 3: Contract Binding Consistency - 15 Points ### 3.1 Binding Generation (3 points) - [x] **3.1.1** Bindings generated from latest compiled contracts - Location: `bindings/` directory - Status: ✅ **PASS** - Generated from Mev-Alpha contracts - Action: None - [x] **3.1.2** Binding generation script exists and is automated - Location: `scripts/generate-bindings.sh` - Status: ✅ **PASS** - Script created and tested - Action: None - [ ] **3.1.3** Generated bindings compile without errors - Location: `go build ./bindings/...` - Status: ✅ **PASS** - Verified compilation - Action: Add to CI/CD pipeline ### 3.2 Binding Usage (6 points) - [ ] **3.2.1** All contract calls use generated bindings (not raw ABI) - Location: `pkg/uniswap/contracts.go`, others - Status: ⚠️ **WARN** - Some files still use manual ABI - Action: Refactor 17 files identified in audit - [ ] **3.2.2** Function signatures match deployed contract ABIs - Location: All binding usage - Status: ⏸️ Compare with on-chain ABIs - Action: Verify against Arbiscan - [ ] **3.2.3** Event parsing uses binding-generated methods - Location: `pkg/events/parser.go` - Status: ⚠️ **WARN** - Uses manual event parsing - Action: Refactor to use binding events - [ ] **3.2.4** Type conversions handled correctly (big.Int, addresses) - Location: All binding usage - Status: ⏸️ Review type handling - Action: Test with extreme values - [ ] **3.2.5** Error handling for contract calls is comprehensive - Location: All contract interaction code - Status: ⏸️ Audit error handling - Action: Test with reverted transactions - [ ] **3.2.6** Contract addresses centralized and version-tracked - Location: `bindings/addresses.go` - Status: ⚠️ **WARN** - Addresses set to zero (not deployed) - Action: Update after deployment ### 3.3 Binding Testing (3 points) - [ ] **3.3.1** Integration tests verify binding functionality - Location: `tests/integration/fork_test.go` - Status: 🔄 **IN PROGRESS** - Tests created, not run - Action: Execute fork tests - [ ] **3.3.2** Binding calls tested against fork environment - Location: Integration test suite - Status: 🔄 **IN PROGRESS** - Framework ready - Action: Run tests - [ ] **3.3.3** ABI compatibility verified with deployed contracts - Location: Test suite - Status: ⏸️ Deploy and verify - Action: Compare ABIs post-deployment ### 3.4 Documentation (3 points) - [x] **3.4.1** Binding usage patterns documented - Location: `docs/BINDING_CONSISTENCY_GUIDE.md` - Status: ✅ **PASS** - Comprehensive guide created - Action: None - [x] **3.4.2** Migration guide for manual ABI to bindings exists - Location: `TODO_BINDING_MIGRATION.md` - Status: ✅ **PASS** - Detailed roadmap created - Action: Execute migration - [x] **3.4.3** Contract deployment addresses documented - Location: `bindings/addresses.go`, deployment docs - Status: ✅ **PASS** - Structure in place - Action: Update after deployment --- ## Section 4: Testing Coverage - 15 Points ### 4.1 Unit Testing (5 points) - [ ] **4.1.1** Solidity unit test coverage >80% - Location: `test/unit/` directory - Status: ⏸️ Measure coverage - Action: `forge coverage` - [ ] **4.1.2** Go unit test coverage >80% - Location: `pkg/` test files - Status: ⏸️ Measure coverage - Action: `go test -cover ./...` - [ ] **4.1.3** Critical functions have edge case tests - Location: Math libraries, ABI decoders - Status: ⏸️ Review test cases - Action: Add boundary tests - [ ] **4.1.4** Mock contracts used for isolated testing - Location: `test/mocks/` - Status: ⏸️ Verify mock completeness - Action: Review mock implementations - [ ] **4.1.5** Test data includes realistic mainnet scenarios - Location: Test fixtures - Status: ⏸️ Review test data - Action: Add real transaction examples ### 4.2 Integration Testing (5 points) - [ ] **4.2.1** Fork tests validate contract deployments - Location: `script/DeployAndTest.s.sol` - Status: 🔄 **IN PROGRESS** - Script created - Action: Execute on Arbitrum fork - [ ] **4.2.2** End-to-end arbitrage flow tested - Location: `tests/integration/fork_test.go` - Status: 🔄 **IN PROGRESS** - Tests written - Action: Execute tests - [ ] **4.2.3** Multi-DEX interactions tested - Location: Integration tests - Status: ⏸️ Create tests - Action: Test Uniswap, Sushiswap, Camelot - [ ] **4.2.4** Flash loan execution tested end-to-end - Location: Flash swap tests - Status: ⏸️ Create comprehensive tests - Action: Test all flash swap paths - [ ] **4.2.5** Error conditions tested (reverts, failures) - Location: All test suites - Status: ⏸️ Add negative tests - Action: Test failure scenarios ### 4.3 Performance Testing (3 points) - [ ] **4.3.1** Gas usage profiled and optimized - Location: Solidity contracts - Status: ⏸️ Profile gas usage - Action: `forge snapshot` and analyze - [ ] **4.3.2** Transaction throughput benchmarked - Location: Go bot processing - Status: ⏸️ Benchmark processing speed - Action: Measure TPS handling - [ ] **4.3.3** Memory usage profiled under load - Location: Go application - Status: ⏸️ Profile memory - Action: `go tool pprof` under load ### 4.4 Security Testing (2 points) - [ ] **4.4.1** Static analysis tools run (Slither, GoSec) - Location: CI/CD pipeline - Status: ⏸️ Run security scanners - Action: `slither .` and `gosec ./...` - [ ] **4.4.2** Fuzzing tests for critical functions - Location: Solidity and Go - Status: ⏸️ Implement fuzzing - Action: Use Foundry fuzzing and go-fuzz --- ## Section 5: Deployment Readiness - 10 Points ### 5.1 Infrastructure (3 points) - [ ] **5.1.1** RPC endpoints configured with failover - Location: `pkg/arbitrum/connection.go` - Status: ✅ **PASS** - Multi-endpoint support implemented - Action: Test failover mechanism - [ ] **5.1.2** Rate limiting configured appropriately - Location: `internal/ratelimit/` - Status: ⏸️ Review rate limits - Action: Test against RPC limits - [ ] **5.1.3** Monitoring and alerting configured - Location: Metrics collection - Status: ⏸️ Setup monitoring - Action: Configure Prometheus/Grafana ### 5.2 Configuration Management (3 points) - [ ] **5.2.1** Production config separate from dev/test - Location: `config/` directory - Status: ⏸️ Verify separation - Action: Create production configs - [ ] **5.2.2** Secrets managed securely (not in repo) - Location: `.env` files, secret management - Status: ⏸️ Audit secret storage - Action: Use vault or secret manager - [ ] **5.2.3** Configuration validation on startup - Location: Config loader - Status: ⏸️ Test validation - Action: Test with invalid configs ### 5.3 Operational Procedures (4 points) - [ ] **5.3.1** Deployment runbook documented - Location: Deployment documentation - Status: ⏸️ Create runbook - Action: Document step-by-step deployment - [ ] **5.3.2** Rollback procedure documented and tested - Location: Operational docs - Status: ⏸️ Create rollback plan - Action: Test rollback procedure - [ ] **5.3.3** Emergency shutdown procedure defined - Location: Operational docs - Status: ⏸️ Document emergency procedures - Action: Create shutdown checklist - [ ] **5.3.4** On-call rotation and escalation defined - Location: Operational docs - Status: ⏸️ Define on-call process - Action: Create escalation matrix --- ## Section 6: Operational Security - 10 Points ### 6.1 Key Management (3 points) - [ ] **6.1.1** Private keys encrypted at rest - Location: Key storage - Status: ⏸️ Verify encryption - Action: Test key encryption - [ ] **6.1.2** Hardware wallet support for production keys - Location: Signing logic - Status: ⏸️ Implement HSM/hardware wallet - Action: Integrate Ledger/Trezor support - [ ] **6.1.3** Key rotation procedure documented - Location: Security docs - Status: ⏸️ Create key rotation plan - Action: Document rotation steps ### 6.2 Access Control (3 points) - [ ] **6.2.1** Production server access restricted - Location: Infrastructure - Status: ⏸️ Configure access controls - Action: Setup IAM/SSH restrictions - [ ] **6.2.2** Audit logging for all privileged operations - Location: Logging system - Status: ⏸️ Implement audit logs - Action: Log all admin operations - [ ] **6.2.3** Multi-factor authentication required - Location: Access systems - Status: ⏸️ Enable MFA - Action: Enforce MFA for all access ### 6.3 Monitoring (4 points) - [ ] **6.3.1** Real-time transaction monitoring - Location: Monitoring dashboard - Status: ⏸️ Setup monitoring - Action: Create transaction dashboard - [ ] **6.3.2** Anomaly detection for unusual activity - Location: Alerting system - Status: ⏸️ Configure anomaly detection - Action: Define normal behavior baselines - [ ] **6.3.3** Balance monitoring and alerts - Location: Wallet monitoring - Status: ⏸️ Setup balance alerts - Action: Alert on unexpected balance changes - [ ] **6.3.4** Performance metrics tracked (latency, throughput) - Location: Metrics system - Status: ⏸️ Collect metrics - Action: Setup Prometheus metrics --- ## Section 7: Code Quality - 5 Points ### 7.1 Style & Standards (2 points) - [ ] **7.1.1** Code follows project style guidelines - Location: All code files - Status: ⏸️ Run linters - Action: `golangci-lint run`, `forge fmt` - [ ] **7.1.2** No critical linter warnings - Location: Lint reports - Status: ⏸️ Fix lint issues - Action: Address all critical warnings ### 7.2 Documentation (2 points) - [ ] **7.2.1** All public functions documented - Location: All packages - Status: ⏸️ Review documentation - Action: Add missing docstrings - [ ] **7.2.2** Complex logic has inline comments - Location: Math calculations, algorithms - Status: ⏸️ Review comments - Action: Add explanatory comments ### 7.3 Maintainability (1 point) - [ ] **7.3.1** No files >500 lines (modular design) - Location: All source files - Status: ⏸️ Check file sizes - Action: Refactor large files --- ## Section 8: Performance & Scalability - 5 Points ### 8.1 Efficiency (3 points) - [ ] **8.1.1** Transaction processing <100ms average - Location: Processing pipeline - Status: ⏸️ Benchmark performance - Action: Measure end-to-end latency - [ ] **8.1.2** Memory footprint <2GB under normal load - Location: Application runtime - Status: ⏸️ Profile memory - Action: Monitor memory usage - [ ] **8.1.3** No obvious performance bottlenecks - Location: All code paths - Status: ⏸️ Profile code - Action: Use pprof to find bottlenecks ### 8.2 Scalability (2 points) - [ ] **8.2.1** Can handle 1000+ transactions per second - Location: Processing pipeline - Status: ⏸️ Load test - Action: Stress test with high volume - [ ] **8.2.2** Horizontally scalable architecture - Location: System design - Status: ⏸️ Review architecture - Action: Document scaling approach --- ## Section 9: Risk Management - 5 Points ### 9.1 Financial Risks (3 points) - [ ] **9.1.1** Maximum loss per transaction limited - Location: Execution logic - Status: ⏸️ Implement loss limits - Action: Add max loss checks - [ ] **9.1.2** Daily loss limits enforced - Location: Risk management - Status: ⏸️ Implement daily limits - Action: Track daily P&L - [ ] **9.1.3** Slippage protection configured - Location: Trade execution - Status: ✅ **PASS** - MinProfit parameter exists - Action: Test slippage scenarios ### 9.2 Operational Risks (2 points) - [ ] **9.2.1** Circuit breaker for repeated failures - Location: Execution logic - Status: ⏸️ Implement circuit breaker - Action: Add failure threshold checks - [ ] **9.2.2** Automated trading can be paused/stopped - Location: Main control loop - Status: ⏸️ Add pause mechanism - Action: Implement emergency stop --- ## Audit Execution Commands ### Run Automated Checks ```bash # Solidity Security cd /home/administrator/projects/Mev-Alpha slither . forge test --gas-report forge coverage # Go Security cd /home/administrator/projects/mev-beta gosec ./... go test -race ./... go test -cover ./... golangci-lint run # Performance go test -bench=. -benchmem ./... go tool pprof -http=:8080 cpu.prof # Integration Tests forge script script/DeployAndTest.s.sol --fork-url $ARBITRUM_RPC_ENDPOINT -vvvv go test ./tests/integration -v -timeout 30m ``` ### Manual Review Checklist - [ ] Review all `// TODO` comments - [ ] Review all `// FIXME` comments - [ ] Review all `// HACK` comments - [ ] Check for hardcoded addresses - [ ] Check for hardcoded private keys - [ ] Review all `panic()` calls - [ ] Review all unchecked type conversions - [ ] Review all external calls --- ## Current Score Estimation Based on information available: | Category | Points Possible | Est. Score | % | |----------|----------------|------------|---| | 1. Smart Contract Security | 25 | 15 | 60% | | 2. Go Code Security | 20 | 12 | 60% | | 3. Contract Bindings | 15 | 12 | 80% | | 4. Testing Coverage | 15 | 6 | 40% | | 5. Deployment Readiness | 10 | 3 | 30% | | 6. Operational Security | 10 | 2 | 20% | | 7. Code Quality | 5 | 3 | 60% | | 8. Performance | 5 | 2 | 40% | | 9. Risk Management | 5 | 2 | 40% | | **TOTAL** | **100** | **57** | **57%** | **Current Status**: ⚠️ **DEVELOPMENT STAGE** - Not production ready **Required for Production**: 90/100 (90%) **Gap**: 33 points --- ## Priority Recommendations ### Critical (Complete Before Production) 1. **Run comprehensive security audit** (Slither, GoSec, manual review) 2. **Execute all integration tests** on Arbitrum fork 3. **Implement operational monitoring** (Prometheus, Grafana) 4. **Setup key management** (hardware wallet integration) 5. **Complete contract deployment** and verify on Arbitrum 6. **Implement circuit breakers** and loss limits 7. **Create operational runbooks** (deployment, rollback, emergency) ### High Priority (Complete Within 1 Week) 8. **Achieve 80%+ test coverage** (Solidity and Go) 9. **Refactor manual ABI usage** to use bindings 10. **Performance profiling** and optimization 11. **Setup monitoring and alerting** 12. **Document all procedures** ### Medium Priority (Complete Within 1 Month) 13. **Implement fuzzing tests** 14. **Setup CI/CD pipeline** 15. **Create disaster recovery plan** 16. **Conduct load testing** --- ## Next Steps 1. **Execute automated audit tools** (see commands above) 2. **Run fork deployment test** (`forge script script/DeployAndTest.s.sol`) 3. **Complete integration test suite** 4. **Address all ❌ FAIL and ⚠️ WARN items** 5. **Re-run audit to achieve 90/100 score** **Audit Report Generated**: 2025-10-26 **Next Review Date**: After critical items completed