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**Implementation:** - Created UniswapV2Parser with ParseLog() and ParseReceipt() methods - Proper event signature detection (Swap event) - Token extraction from pool cache with decimal scaling - Automatic scaling to 18 decimals for internal representation - Support for multiple swaps per transaction **Testing:** - Comprehensive unit tests with 100% coverage - Tests for valid/invalid events, batch parsing, edge cases - Mock logger and pool cache for isolated testing **Validation & Logging:** - SwapLogger: Saves detected swaps to JSON files for testing - Individual swap logging with raw log data - Batch logging for multi-swap transactions - Log cleanup for old entries (configurable retention) - ArbiscanValidator: Verifies parsed swaps against Arbiscan API - Compares pool address, tx hash, block number, log index - Validates sender and recipient addresses - Detects and logs discrepancies for investigation - Batch validation support for transactions with multiple swaps **Type System Updates:** - Exported ScaleToDecimals() function for use across parsers - Updated tests to use exported function name - Consistent decimal handling (USDC 6, WBTC 8, WETH 18) **Use Cases:** 1. Real-time parsing: parser.ParseLog() for individual events 2. Transaction analysis: parser.ParseReceipt() for all swaps 3. Accuracy verification: validator.ValidateSwap() against Arbiscan 4. Testing: Load saved logs and replay for regression testing **Task:** P2-002 (UniswapV2 parser base implementation) **Coverage:** 100% (enforced in CI/CD) **Protocol:** UniswapV2 on Arbitrum 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>