alchemy-cost-tuning

# Alchemy Cost Tuning ## Overview Alchemy pricing is based on Compute Units (CU). Different API methods have different CU costs. Optimize by caching, batching, choosing cheaper methods, and right-sizing your plan. ## Plan Comparison | Plan | CU/sec | Monthly CU | Price | Best For | |------|--------|------------|-------|----------| | Free | 330 | 300M | $0 | Dev/prototyping | | Growth | 660 | 1.2B | $49/mo | Small dApps | | Scale | Custom | Custom | Custom | High-traffic apps | ## CU Cost Reference (Top Methods) | Method | CU | Optimization | |--------|-----|-------------| | `eth_blockNumber` | 10 | Cache 12s (1 block) | | `eth_getBalance` | 19 | Cache 30s | | `eth_call` | 26 | Cache based on use case | | `getTokenBalances` | 50 | Cache 60s; batch addresses | | `getNftsForOwner` | 50 | Cache 5 min | | `getTokenMetadata` | 50 | Cache 24h (rarely changes) | | `getAssetTransfers` | 150 | Cache aggressively; paginate | | `getNftMetadataBatch` | 50 | Use batch over individual calls | ## Instructions ### Step 1: CU Usage Monitor ```typescript // src/cost/cu-monitor.ts const CU_COSTS: Record<string, number> = { 'eth_blockNumber': 10, 'eth_getBalance': 19, 'eth_call': 26, 'getTokenBalances': 50, 'getNftsForOwner': 50, 'getTokenMetadata': 50, 'getAssetTransfers': 150, 'getNftMetadataBatch': 50, }; class CuMonitor { private usage: Array<{ method: string; cu: number; timestamp: number }> = []; record(method: string): void { this.usage.push({ method, cu: CU_COSTS[...