fix(multicall): resolve critical multicall parsing corruption issues

- Added comprehensive bounds checking to prevent buffer overruns in multicall parsing
- Implemented graduated validation system (Strict/Moderate/Permissive) to reduce false positives
- Added LRU caching system for address validation with 10-minute TTL
- Enhanced ABI decoder with missing Universal Router and Arbitrum-specific DEX signatures
- Fixed duplicate function declarations and import conflicts across multiple files
- Added error recovery mechanisms with multiple fallback strategies
- Updated tests to handle new validation behavior for suspicious addresses
- Fixed parser test expectations for improved validation system
- Applied gofmt formatting fixes to ensure code style compliance
- Fixed mutex copying issues in monitoring package by introducing MetricsSnapshot
- Resolved critical security vulnerabilities in heuristic address extraction
- Progress: Updated TODO audit from 10% to 35% complete

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

docs/master-plan/10-development-testing.md

@@ -0,0 +1,131 @@
+# Development and Testing Plan
+
+## Overview
+
+This document outlines the development methodology and testing strategy for implementing exchange-specific helper libraries in the MEV bot project.
+
+## Development Methodology
+
+### Iterative Development
+1. Implement core interface for each exchange
+2. Add basic swap functionality
+3. Implement liquidity operations
+4. Add pricing functions
+5. Enhance with exchange-specific features
+6. Optimize performance
+
+### Code Organization
+- Separate packages for each exchange: `pkg/exchanges/uniswap`, `pkg/exchanges/sushiswap`, etc.
+- Shared interfaces in `pkg/interfaces`
+- Common utilities in `pkg/utils`
+- Configuration in `pkg/config`
+
+### Version Control
+- Feature branches for each exchange implementation
+- Regular integration with main branch
+- Clear commit messages following conventional commits
+- Pull request reviews for all changes
+
+## Testing Strategy
+
+### Unit Testing
+- Test each function in isolation
+- Mock external dependencies
+- Test edge cases and error conditions
+- Verify interface compliance
+- Target >90% code coverage for core exchange functions
+
+### Integration Testing
+- Test with mainnet fork environments
+- Validate against real exchange contracts
+- Test multi-step operations
+- Verify gas cost estimations
+- Cross-platform consistency checks
+
+### Performance Testing
+- Measure execution latency
+- Test throughput under load
+- Benchmark gas consumption
+- Profile memory usage
+- Stress test with high-frequency requests
+
+### Security Testing
+- Validate input sanitization
+- Test for common vulnerabilities
+- Verify slippage protection
+- Check for reentrancy issues
+- Audit external calls
+
+## Quality Assurance
+
+### Code Review Process
+- Required review for all pull requests
+- Automated linting and formatting
+- Security checks with gosec
+- Documentation verification
+- Test coverage verification
+
+### Continuous Integration
+- Automated testing on push/PR
+- Build verification
+- Security scanning
+- Performance regression checks
+- Code quality metrics
+
+## Implementation Timeline
+
+### Phase 1: Foundation (Week 1-2)
+- Set up project structure
+- Implement common interfaces
+- Create base exchange module
+- Set up testing framework
+
+### Phase 2: Core Exchanges (Week 3-6)
+- Implement Uniswap V2/V3 support
+- Implement SushiSwap support
+- Add basic Curve support
+- Complete unit tests for core exchanges
+
+### Phase 3: Advanced Exchanges (Week 7-9)
+- Implement Balancer support
+- Implement PancakeSwap support
+- Add DEX aggregator support
+- Complete integration tests
+
+### Phase 4: Arbitrage & Optimization (Week 10-12)
+- Implement cross-exchange arbitrage
+- Performance optimization
+- Security hardening
+- Final testing and documentation
+
+## Tools and Infrastructure
+
+### Development Tools
+- Go 1.21+
+- Ethereum development framework (Geth/Erigon)
+- Test automation tools
+- Profiling and debugging tools
+- Code coverage tools
+
+### Testing Infrastructure
+- Local Ethereum node
+- Mainnet fork environment
+- Testnet deployment
+- Mock exchange contracts
+- Performance benchmarking tools
+
+## Risk Management
+
+### Technical Risks
+- Smart contract changes affecting compatibility
+- Gas cost fluctuations
+- Network congestion
+- Price feed inaccuracies
+- Security vulnerabilities
+
+### Mitigation Strategies
+- Regular contract verification
+- Gas price monitoring
+- Multiple price feed sources
+- Comprehensive testing
+- Security audits