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Mnemonic Account

A function to create a Mnemonic Account.

A Mnemonic Account is a Hierarchical Deterministic (HD) Account that is derived from a BIP-39 mnemonic phrase and an optional HD path.

It has the ability to sign transactions and messages with the private key derived from the HD Node.

Import

import { mnemonicToAccount } from 'viem/accounts'

Usage

To initialize a Mnemonic Account, you will need to pass a mnemonic phrase to mnemonicToAccount:

import { createWalletClient, http } from 'viem'
import { mnemonicToAccount } from 'viem/accounts'
import { mainnet } from 'viem/chains'
 
const account = mnemonicToAccount('legal winner thank year wave sausage worth useful legal winner thank yellow') 
 
const client = createWalletClient({
  account,
  chain: mainnet,
  transport: http()
})

Note: the above is a valid mnemonic, but it is not a "real" mnemonic. Please do not use it for anything other than testing.

Generating Mnemonics

You can generate a random BIP-39 mnemonic using the generateMnemonic function with a wordlist:

import { english, generateMnemonic } from 'viem/accounts'
 
const mnemonic = generateMnemonic(english)

Available wordlists:

  • czech
  • english
  • french
  • italian
  • japanese
  • korean
  • simplifiedChinese
  • spanish
  • traditionalChinese

Parameters

mnemonic

  • Type: string

The BIP-39 mnemonic phrase.

const account = mnemonicToAccount(
  'legal winner thank year wave sausage worth useful legal winner thank yellow'
)

options.accountIndex

  • Type: number
  • Default: 0

The account index to use in the path ("m/44'/60'/${accountIndex}'/0/0") to derive a private key.

const account = mnemonicToAccount(
  'legal winner thank year wave sausage worth useful legal winner thank yellow',
  {
    accountIndex: 1
  }
)

options.addressIndex

  • Type: number
  • Default: 0

The address index to use in the path ("m/44'/60'/0'/0/${addressIndex}") to derive a private key.

const account = mnemonicToAccount(
  'legal winner thank year wave sausage worth useful legal winner thank yellow',
  {
    accountIndex: 1,
    addressIndex: 6
  }
)

options.changeIndex

  • Type: number
  • Default: 0

The change index to use in the path ("m/44'/60'/0'/${changeIndex}/0") to derive a private key.

const account = mnemonicToAccount(
  'legal winner thank year wave sausage worth useful legal winner thank yellow',
  {
    accountIndex: 1,
    addressIndex: 6,
    changeIndex: 2
  }
)

options.path

  • Type: "m/44'/60'/${string}"

The HD path to use to derive a private key.

const account = mnemonicToAccount(
  'legal winner thank year wave sausage worth useful legal winner thank yellow',
  {
    path: "m/44'/60'/5'/0/2"
  }
)