OP Viem
Overview
op-viem is a TypeScript extension for Viem that provides actions for working with OP Stack L2 chains such as Optimism and Base.
Features
- Simplifies cross L1 & L2 interactions
- Seamless extension to Viem
- TypeScript ready
- Test suite running against forked Ethereum network
Installation
bash
npm i op-viem
bash
pnpm i op-viem
bash
bun i op-viem
Example
ts
// import modules
import { createWalletClient, createPublicClient, custom, http } from 'viem'
import { privateKeyToAccount } from 'viem/accounts'
import { mainnet, base } from 'viem/chains'
import { baseAddresses } from 'op-viem/chains'
import { walletL1OpStackActions, publicL1OpStackActions, publicL2OpStackActions } from 'op-viem'
// create clients
export const opStackL1WalletClient = createWalletClient({
chain: mainnet,
transport: custom(window.ethereum)
}).extend(walletL1OpStackActions)
export const opStackL1PublicClient = createPublicClient({
chain: mainnet,
transport: http()
}).extend(publicL1OpStackActions)
export const opStackL2PublicClient = createPublicClient({
chain: base,
transport: http()
}).extend(publicL2OpStackActions)
// perform an action
opStackL1PublicClient.getOutputForL2Block(blockNumber: 2725977n, ...baseAddresses)