mev-beta/docs/COMPREHENSIVE_100_POINT_AUDIT.md

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)

• 3.1.1 Bindings generated from latest compiled contracts

  • Location: bindings/ directory
  • Status: ✅ PASS - Generated from Mev-Alpha contracts
  • Action: None

• 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)

• 3.4.1 Binding usage patterns documented

  • Location: docs/BINDING_CONSISTENCY_GUIDE.md
  • Status: ✅ PASS - Comprehensive guide created
  • Action: None

• 3.4.2 Migration guide for manual ABI to bindings exists

  • Location: TODO_BINDING_MIGRATION.md
  • Status: ✅ PASS - Detailed roadmap created
  • Action: Execute migration

• 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

# 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