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**Implementation:** - Created UniswapV3Parser with ParseLog() and ParseReceipt() methods - V3 event signature: Swap(address,address,int256,int256,uint160,uint128,int24) - Signed integer handling (int256) for amounts - Automatic conversion: negative = input, positive = output - SqrtPriceX96 decoding (Q64.96 fixed-point format) - Liquidity and tick tracking from event data - Token extraction from pool cache with decimal scaling **Key Differences from V2:** - Signed amounts (int256) instead of separate in/out fields - Only 2 amounts (amount0, amount1) vs 4 in V2 - SqrtPriceX96 for price representation - Liquidity (uint128) tracking - Tick (int24) tracking for concentrated liquidity positions - sender and recipient both indexed (in topics) **Testing:** - Comprehensive unit tests with 100% coverage - Tests for both positive and negative amounts - Edge cases: both negative, both positive (invalid but parsed) - Decimal scaling validation (18 decimals and 6 decimals) - Two's complement encoding for negative numbers - Tick handling (positive and negative) - Mixed V2/V3 event filtering in receipts **Price Calculation:** - CalculatePriceFromSqrtPriceX96() helper function - Converts Q64.96 format to human-readable price - Price = (sqrtPriceX96 / 2^96)^2 - Adjusts for decimal differences between tokens **Type System:** - Exported ScaleToDecimals() for cross-parser usage - Updated existing tests to use exported function - Consistent decimal handling across V2 and V3 parsers **Use Cases:** 1. Parse V3 swaps: parser.ParseLog() with signed amount conversion 2. Track price movements: CalculatePriceFromSqrtPriceX96() 3. Monitor liquidity changes: event.Liquidity 4. Track tick positions: event.Tick 5. Multi-hop arbitrage: ParseReceipt() for complex routes **Task:** P2-010 (UniswapV3 parser base implementation) **Coverage:** 100% (enforced in CI/CD) **Protocol:** UniswapV3 on Arbitrum 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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