signTransaction

Signs a transaction.

Usage

example.tsconfig.ts

import { account, walletClient } from './config'
 
const request = await walletClient.prepareTransactionRequest({
  account,
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: 1000000000000000000n
})

const signature = await walletClient.signTransaction(request) 
// 0x02f850018203118080825208808080c080a04012522854168b27e5dc3d5839bab5e6b39e1a0ffd343901ce1622e3d64b48f1a04e00902ae0502c4728cbf12156290df99c3ed7de85b1dbfe20b5c36931733a33

const hash = await walletClient.sendRawTransaction(signature)

import { account, walletClient } from './config'
 
const request = await walletClient.prepareTransactionRequest({
  account,
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: 1000000000000000000n
})

const signature = await walletClient.signTransaction(request) 
// 0x02f850018203118080825208808080c080a04012522854168b27e5dc3d5839bab5e6b39e1a0ffd343901ce1622e3d64b48f1a04e00902ae0502c4728cbf12156290df99c3ed7de85b1dbfe20b5c36931733a33

const hash = await walletClient.sendRawTransaction(signature)

import { createWalletClient, custom } from 'viem'
import { privateKeyToAccount } from 'viem/accounts'
import { mainnet } from 'viem/chains'

export const walletClient = createWalletClient({
  chain: mainnet,
  transport: custom(window.ethereum)
})

// JSON-RPC Account
export const [account] = await walletClient.getAddresses()
// Local Account
export const account = privateKeyToAccount(...)

import { createWalletClient, custom } from 'viem'
import { privateKeyToAccount } from 'viem/accounts'
import { mainnet } from 'viem/chains'

export const walletClient = createWalletClient({
  chain: mainnet,
  transport: custom(window.ethereum)
})

// JSON-RPC Account
export const [account] = await walletClient.getAddresses()
// Local Account
export const account = privateKeyToAccount(...)

Account Hoisting

If you do not wish to pass an account to every prepareTransactionRequest, you can also hoist the Account on the Wallet Client (see config.ts).

Learn more.

example.tsconfig.ts (JSON-RPC Account)config.ts (Local Account)

import { walletClient } from './config'
 
const request = await walletClient.prepareTransactionRequest({
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: 1000000000000000000n
})

const signature = await walletClient.signTransaction(request) 
// 0x02f850018203118080825208808080c080a04012522854168b27e5dc3d5839bab5e6b39e1a0ffd343901ce1622e3d64b48f1a04e00902ae0502c4728cbf12156290df99c3ed7de85b1dbfe20b5c36931733a33

const hash = await walletClient.sendRawTransaction(signature)

import { walletClient } from './config'
 
const request = await walletClient.prepareTransactionRequest({
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: 1000000000000000000n
})

const signature = await walletClient.signTransaction(request) 
// 0x02f850018203118080825208808080c080a04012522854168b27e5dc3d5839bab5e6b39e1a0ffd343901ce1622e3d64b48f1a04e00902ae0502c4728cbf12156290df99c3ed7de85b1dbfe20b5c36931733a33

const hash = await walletClient.sendRawTransaction(signature)

import { createWalletClient, custom } from 'viem'

// Retrieve Account from an EIP-1193 Provider.
const [account] = await window.ethereum.request({ 
  method: 'eth_requestAccounts' 
})

export const walletClient = createWalletClient({
  account,
  transport: custom(window.ethereum)
})

import { createWalletClient, custom } from 'viem'

// Retrieve Account from an EIP-1193 Provider.
const [account] = await window.ethereum.request({ 
  method: 'eth_requestAccounts' 
})

export const walletClient = createWalletClient({
  account,
  transport: custom(window.ethereum)
})

import { createWalletClient, custom } from 'viem'
import { privateKeyToAccount } from 'viem/accounts'

export const walletClient = createWalletClient({
  account: privateKeyToAccount('0x...'),
  transport: custom(window.ethereum)
})

import { createWalletClient, custom } from 'viem'
import { privateKeyToAccount } from 'viem/accounts'

export const walletClient = createWalletClient({
  account: privateKeyToAccount('0x...'),
  transport: custom(window.ethereum)
})

Returns

Hex

The signed serialized transaction.

Parameters

account

Type: Account | Address

The Account to send the transaction from.

Accepts a JSON-RPC Account or Local Account (Private Key, etc).

const signature = await walletClient.signTransaction({
  account: '0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266', 
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: 1000000000000000000n
})

const signature = await walletClient.signTransaction({
  account: '0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266', 
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: 1000000000000000000n
})

to

Type: 0x${string}

The transaction recipient or contract address.

const signature = await walletClient.signTransaction({
  account,
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8', 
  value: 1000000000000000000n,
  nonce: 69
})

const signature = await walletClient.signTransaction({
  account,
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8', 
  value: 1000000000000000000n,
  nonce: 69
})

accessList (optional)

Type: AccessList

The access list.

const signature = await publicClient.signTransaction({
  accessList: [ 
    {
      address: '0x1',
      storageKeys: ['0x1'],
    },
  ],
  account,
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
})

const signature = await publicClient.signTransaction({
  accessList: [ 
    {
      address: '0x1',
      storageKeys: ['0x1'],
    },
  ],
  account,
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
})

chain (optional)

Type: Chain
Default: walletClient.chain

The target chain. If there is a mismatch between the wallet's current chain & the target chain, an error will be thrown.

The chain is also used to infer its request type (e.g. the Celo chain has a gatewayFee that you can pass through to signTransaction).

import { optimism } from 'viem/chains' 

const signature = await walletClient.signTransaction({
  chain: optimism, 
  account,
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: 1000000000000000000n
})

import { optimism } from 'viem/chains' 

const signature = await walletClient.signTransaction({
  chain: optimism, 
  account,
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: 1000000000000000000n
})

data (optional)

Type: 0x${string}

A contract hashed method call with encoded args.

const signature = await walletClient.signTransaction({
  data: '0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2', 
  account,
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: 1000000000000000000n
})

const signature = await walletClient.signTransaction({
  data: '0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2', 
  account,
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: 1000000000000000000n
})

gasPrice (optional)

Type: bigint

The price (in wei) to pay per gas. Only applies to Legacy Transactions.

const signature = await walletClient.signTransaction({
  account,
  gasPrice: parseGwei('20'), 
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: parseEther('1') 
})

const signature = await walletClient.signTransaction({
  account,
  gasPrice: parseGwei('20'), 
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: parseEther('1') 
})

maxFeePerGas (optional)

Type: bigint

Total fee per gas (in wei), inclusive of maxPriorityFeePerGas. Only applies to EIP-1559 Transactions

const signature = await walletClient.signTransaction({
  account,
  maxFeePerGas: parseGwei('20'),  
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: parseEther('1')
})

const signature = await walletClient.signTransaction({
  account,
  maxFeePerGas: parseGwei('20'),  
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: parseEther('1')
})

maxPriorityFeePerGas (optional)

Type: bigint

Max priority fee per gas (in wei). Only applies to EIP-1559 Transactions

const signature = await walletClient.signTransaction({
  account,
  maxFeePerGas: parseGwei('20'),
  maxPriorityFeePerGas: parseGwei('2'), 
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: parseEther('1')
})

const signature = await walletClient.signTransaction({
  account,
  maxFeePerGas: parseGwei('20'),
  maxPriorityFeePerGas: parseGwei('2'), 
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: parseEther('1')
})

nonce (optional)

Type: number

Unique number identifying this transaction.

const signature = await walletClient.signTransaction({
  account,
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: 1000000000000000000n,
  nonce: 69 
})

const signature = await walletClient.signTransaction({
  account,
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: 1000000000000000000n,
  nonce: 69 
})

value (optional)

Type: bigint

Value in wei sent with this transaction.

const signature = await walletClient.signTransaction({
  account,
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: parseEther('1'), 
  nonce: 69
})

const signature = await walletClient.signTransaction({
  account,
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: parseEther('1'), 
  nonce: 69
})

signTransaction ​

Usage ​

Account Hoisting ​

Returns ​

Parameters ​

account ​

to ​

accessList (optional) ​

chain (optional) ​

data (optional) ​

gasPrice (optional) ​

maxFeePerGas (optional) ​

maxPriorityFeePerGas (optional) ​

nonce (optional) ​

value (optional) ​