Alchemy SDK Patterns

Overview

Production patterns for the alchemy-sdk package: singleton clients, multi-chain factories, response caching, and type-safe contract wrappers.

Instructions

Step 1: Multi-Chain Client Factory

// src/alchemy/client-factory.ts
import { Alchemy, Network } from 'alchemy-sdk';

type ChainName = 'ethereum' | 'polygon' | 'arbitrum' | 'optimism' | 'base';

const NETWORK_MAP: Record<ChainName, Network> = {
  ethereum: Network.ETH_MAINNET,
  polygon: Network.MATIC_MAINNET,