alchemy-common-errors

# Alchemy Common Errors ## Overview Troubleshooting guide for Alchemy SDK errors covering rate limits, RPC failures, invalid parameters, and network-specific issues. ## Error Reference ### Authentication & Rate Limits | HTTP Code | Error | Root Cause | Fix | |-----------|-------|-----------|-----| | `401` | Unauthorized | Invalid or missing API key | Verify key in Alchemy Dashboard | | `403` | Forbidden | API key disabled or app deleted | Create new app in Dashboard | | `429` | Too Many Requests | Rate limit exceeded | Implement backoff; upgrade plan | | `429` | Compute Units exceeded | CU quota depleted | Check CU usage in Dashboard | ### Alchemy Rate Limits by Plan | Plan | Compute Units/sec | Throughput | |------|-------------------|------------| | Free | 330 CU/s | ~25 requests/s | | Growth | 660 CU/s | ~50 requests/s | | Scale | Custom | Custom | ### RPC & Query Errors ```typescript // Common RPC error handler import { Alchemy, Network } from 'alchemy-sdk'; async function safeAlchemyCall<T>( operation: () => Promise<T>, context: string ): Promise<T | null> { try { return await operation(); } catch (error: any) { const code = error.code || error.response?.status; switch (code) { case -32602: // Invalid params console.error(`[${context}] Invalid parameters: ${error.message}`); console.error('Common causes: wrong address format, invalid block number, missing 0x prefix'); break; case -32600: // Invalid reque...