Extending Client with EIP-7702

Setting up your Viem Client

To use the experimental functionality of EIP-7702, you must extend your existing (or new) Viem Client with experimental EIP-7702 Actions.

Overview

Here is an end-to-end overview of how to extend a Viem Client with EIP-7702 Actions. We will break it down into Steps below.

import { createWalletClient, http } from 'viem'
import { anvil } from 'viem/chains'
import { eip7702Actions } from 'viem/experimental'
 
const walletClient = createWalletClient({
  chain: anvil,
  transport: http(),
}).extend(eip7702Actions())
 
const authorization = await walletClient.signAuthorization({/* ... */})

Steps

0. Install & Run Anvil

EIP-7702 is currently not supported on Ethereum Mainnet or Testnets, so let's set up an EIP-7702 compatible network. We will use an Anvil node for this example. If you are using an existing EIP-7702 compatible network, you can skip this step.

curl -L https://foundry.paradigm.xyz | bash
anvil --hardfork prague

1. Set up a Client

We will need to set up a Client to sign EIP-7702 Authorizations.

import { createWalletClient, http } from 'viem'
import { anvil } from 'viem/chains'
 
const walletClient = createWalletClient({
  chain: anvil,
  transport: http(),
})

See createWalletClient Docs

2. Extend with EIP-7702 Actions

Next, we will import the experimental EIP-7702 Actions and extend them on our Client.

import { createWalletClient, http } from 'viem'
import { anvil } from 'viem/chains'
import { eip7702Actions } from 'viem/experimental'
 
const walletClient = createWalletClient({
  chain: anvil,
  transport: http(),
}).extend(eip7702Actions())

3. Use EIP-7702 Actions

Now we can use EIP-7702 Actions like signAuthorization.

import { createWalletClient, http } from 'viem'
import { anvil } from 'viem/chains'
import { eip7702Actions } from 'viem/experimental' 
 
const walletClient = createWalletClient({
  chain: anvil,
  transport: http(),
}).extend(eip7702Actions()) 
 
const authorization = await walletClient.signAuthorization({/* ... */})