signMessage #

Calculates an Ethereum-specific signature in the form of keccak256("\x19Ethereum Signed Message:\n" + len(message) + message)).

With the calculated signature, you can:

• use verifyMessage to verify the signature,
• use recoverMessageAddress to recover the signing address from a signature.

Usage #

import { getAccount } from 'viem'
import { walletClient } from './client'
 
const account = getAccount('0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266')
 
const signature = await walletClient.signMessage({ 
  account,
  data: '0xdeadbeaf',
})
// "0xa3f20717a250c2b0b729b7e5becbff67fdaef7e0699da4de7ca5895b02a170a12d887fd3b17bfdce3481f10bea41f45ba9f709d39ce8325427b57afcfc994cee1b"

import { createWalletClient, custom } from 'viem'

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

Returns #

Hex

The signed message.

Parameters #

account #

• Type: Address

Account to use for signing. Read more.

const signature = await walletClient.signMessage({
  account: getAccount('0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266'), 
  data: '0xdeadbeaf',
})

data #

• Type: string

Message to sign.

const signature = await walletClient.signMessage({
  account: getAccount('0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266'),
  data: 'hello world', 
})

JSON-RPC Methods #

• JSON-RPC Accounts:
  • personal_sign
• Local Accounts
  • Signs locally. No JSON-RPC request.