MemoryClient

MemoryClient: Prettify<Client<Transport, undefined, undefined, [...PublicRpcSchema, …TestRpcSchema<“anvil” | “ganache” | “hardhat”>, JsonRpcSchemaTevm["tevm_call"], JsonRpcSchemaTevm["tevm_script"], JsonRpcSchemaTevm["tevm_dumpState"], JsonRpcSchemaTevm["tevm_loadState"], JsonRpcSchemaTevm["tevm_getAccount"], JsonRpcSchemaTevm["tevm_setAccount"]], PublicActions & TevmActions>>

A local EVM instance running in JavaScript. Similar to Anvil in your browser/node/bun environments It wraps the viem public client and test client

See

• TevmClient
• WrappedEvm for an remote client

Example

import { createMemoryClient } from "tevm"
import { createPublicClient, http } from "@tevm/utils"
import { MyERC721 } from './MyERC721.sol'

const tevm = createMemoryClient({
  fork: {
    transport: http("https://mainnet.optimism.io")({}),
  },
})

const address = '0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045',

await tevm.tevmContract(
  MyERC721.write.mint({
    caller: address,
  }),
)

const balance = await tevm.tevmContract(
 MyERC721.read.balanceOf({
 caller: address,
 }),
 )
 console.log(balance) // 1n

Source

packages/memory-client/src/MemoryClient.ts:40