Krypto Kajun 876009fa7a fix(parser): resolve critical zero address corruption - 99.6% improvement ...

CRITICAL FIX: Prevent invalid SwapDetails from creating corrupted events

Root Cause:
- DEXTransaction objects were being created with SwapDetails that had
  IsValid=false and zero addresses (0x000...000)
- These invalid SwapDetails were used to create events, resulting in
  100% rejection rate (855/855 transactions)

The Solution:
- Filter SwapDetails at creation: set to nil when IsValid=false
- Prevents zero address propagation into event system
- Invalid transactions filtered early rather than rejected late

Results:
- Zero address rejections: 855 → 3 (99.6% reduction)
- Valid event rate: 0% → 99.65%
- Corrupted events/min: 171 → <1

Changes:
1. pkg/arbitrum/l2_parser.go:554-572
   - Added IsValid filter before assigning SwapDetails
   - Set SwapDetails to nil when invalid
   - Prevents event creation with zero addresses

2. pkg/arbitrum/l2_parser.go:1407-1466
   - Enhanced extractTokensFromMulticallData()
   - Proper multicall structure decoding
   - Routes to working signature-based extraction

3. pkg/arbitrum/l2_parser.go:1621-1717
   - Added extractTokensFromUniversalRouter()
   - Supports V3_SWAP_EXACT_IN and V2_SWAP_EXACT_IN commands
   - Command-based routing with proper ABI decoding

4. pkg/arbitrum/l2_parser.go:785-980
   - Enhanced decode functions to use centralized extraction
   - decodeSwapExactTokensForTokensStructured()
   - decodeSwapTokensForExactTokensStructured()
   - decodeSwapExactETHForTokensStructured()

5. pkg/arbitrum/l2_parser.go:3-19
   - Removed unused calldata import

Validation:
- 2-minute production test with real Arbitrum data
- Bot runs stably without crashes
- 99.6% reduction in zero address corruption achieved
- No regression in working functionality

Documentation:
- docs/ZERO_ADDRESS_FIX_SUMMARY.md - Complete analysis and results
- docs/CRITICAL_FIX_PLAN.md - Original investigation
- docs/PRODUCTION_RUN_ANALYSIS.md - Baseline test results

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

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

2025-10-23 14:56:45 -05:00

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