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.
INFO
viem internally uses @scure/bip32, an audited implementation of BIP-32 HD wallets, for hierarchical deterministic (HD) wallet derivation.
Import
import { mnemonicToAccount } from 'viem/accounts'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()
})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)import { english, generateMnemonic } from 'viem/accounts'
const mnemonic = generateMnemonic(english)Available wordlists:
czechenglishfrenchitalianjapanesekoreansimplifiedChinesespanishtraditionalChinese
Parameters
mnemonic
- Type:
string
The BIP-39 mnemonic phrase.
const account = mnemonicToAccount(
'legal winner thank year wave sausage worth useful legal winner thank yellow'
)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'/${accountIndex}'/0/0") to derive a private key.
const account = mnemonicToAccount(
'legal winner thank year wave sausage worth useful legal winner thank yellow',
{
accountIndex: 1
}
)const account = mnemonicToAccount(
'legal winner thank year wave sausage worth useful legal winner thank yellow',
{
accountIndex: 1
}
)options.addressIndex
- Type:
number - Default:
0
The address index to use in the path ("m/44'/60'/0'/0/${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
}
)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'/${changeIndex}/0") to derive a private key.
const account = mnemonicToAccount(
'legal winner thank year wave sausage worth useful legal winner thank yellow',
{
accountIndex: 1,
addressIndex: 6,
changeIndex: 2
}
)const account = mnemonicToAccount(
'legal winner thank year wave sausage worth useful legal winner thank yellow',
{
accountIndex: 1,
addressIndex: 6,
changeIndex: 2
}
)options.path
- Type:
"m/44'/60'/${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"
}
)const account = mnemonicToAccount(
'legal winner thank year wave sausage worth useful legal winner thank yellow',
{
path: "m/44'/60'/5'/0/2"
}
)