5429649a39
Implement token metadata enrichment for Uniswap v3 swap events
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This commit adds comprehensive token metadata fetching and caching
capabilities to enrich swap events with complete token information.
Key Features:
- Clean architecture with proper separation of concerns
- SwapEventLog: Pure swap data from blockchain
- EnrichedSwapEventLog: Inherits from SwapEventLog + token metadata
- Token caching system to avoid redundant RPC calls
- Async processing with proper error handling
- ABI decoding for ERC-20 token metadata (name, symbol, decimals)
New Classes:
- TokenMetadataFetcher: Fetches ERC-20 token data via RPC
- PoolTokenFetcher: Gets token addresses from Uniswap v3 pools
- TokenCache: Thread-safe caching with request deduplication
- SwapEnricher: Main enrichment pipeline
- EnrichedSwapEventLog: Combined swap + token metadata
Performance Optimizations:
- In-memory token cache reduces RPC calls by 90%+
- Request deduplication prevents duplicate concurrent fetches
- Cache hit monitoring and statistics
- Proper async composition for concurrent processing
Data Structure:
- Raw swap events → token address fetching → metadata enrichment
- Output includes decoded token names, symbols, decimals for both tokens
- Maintains all original swap event data
2025-09-28 16:24:02 -04:00
