signTransaction (Local Account)

Signs a transaction with the Account's private key.

Usage

import { parseGwei } from 'viem'
import { privateKeyToAccount } from 'viem/accounts'

const account = privateKeyToAccount('0x...')

const signature = await account.signTransaction({
  maxFeePerGas: parseGwei('20'),
  maxPriorityFeePerGas: parseGwei('3'),
  gas: 21000n,
  nonce: 69,
  to: '0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266'
})
// "0x02f850018203118080825208808080c080a04012522854168b27e5dc3d5839bab5e6b39e1a0ffd343901ce1622e3d64b48f1a04e00902ae0502c4728cbf12156290df99c3ed7de85b1dbfe20b5c36931733a33"

import { parseGwei } from 'viem'
import { privateKeyToAccount } from 'viem/accounts'

const account = privateKeyToAccount('0x...')

const signature = await account.signTransaction({
  maxFeePerGas: parseGwei('20'),
  maxPriorityFeePerGas: parseGwei('3'),
  gas: 21000n,
  nonce: 69,
  to: '0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266'
})
// "0x02f850018203118080825208808080c080a04012522854168b27e5dc3d5839bab5e6b39e1a0ffd343901ce1622e3d64b48f1a04e00902ae0502c4728cbf12156290df99c3ed7de85b1dbfe20b5c36931733a33"

Custom serializer

viem has a built-in serializer for Legacy, EIP-2930 (0x01) and EIP-1559 (0x02) transaction types. If you would like to serialize on another transaction type that viem does not support internally, you can pass a custom serializer.

import { parseGwei } from 'viem'
import { privateKeyToAccount } from 'viem/accounts'

const account = privateKeyToAccount('0x...')

const signature = await account.signTransaction({
  maxFeePerGas: parseGwei('20'),
  maxPriorityFeePerGas: parseGwei('3'),
  gas: 21000n,
  nonce: 69,
  to: '0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266'
}, {
  serializer(transaction) { 
    const {
      chainId,
      nonce,
      // ...
    } = transaction

    return concatHex([
      '0x69',
      toRlp([
        toHex(chainId),
        nonce ? toHex(nonce) : '0x',
        // ...
      ]),
    ])
  }
})

import { parseGwei } from 'viem'
import { privateKeyToAccount } from 'viem/accounts'

const account = privateKeyToAccount('0x...')

const signature = await account.signTransaction({
  maxFeePerGas: parseGwei('20'),
  maxPriorityFeePerGas: parseGwei('3'),
  gas: 21000n,
  nonce: 69,
  to: '0xf39fd6e51aad88f6f4ce6ab8827279cfffb92266'
}, {
  serializer(transaction) { 
    const {
      chainId,
      nonce,
      // ...
    } = transaction

    return concatHex([
      '0x69',
      toRlp([
        toHex(chainId),
        nonce ? toHex(nonce) : '0x',
        // ...
      ]),
    ])
  }
})

Returns

Hex

The signed transaction.

Parameters

accessList (optional)

Type: AccessList

The access list.

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

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

chainId (optional)

Type: number

The chain ID.

const signature = await account.signTransaction({
  chainId: 1, 
})

const signature = await account.signTransaction({
  chainId: 1, 
})

data (optional)

Type: 0x${string}

Transaction data.

const signature = await account.signTransaction({
  data: '0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2' 
})

const signature = await account.signTransaction({
  data: '0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2' 
})

gas (optional)

Type: bigint

The gas limit for the transaction.

const signature = await account.signTransaction({
  gas: 69420n, 
})

const signature = await account.signTransaction({
  gas: 69420n, 
})

gasPrice (optional)

Type: bigint

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

const signature = await account.signTransaction({
  gasPrice: parseGwei('20'), 
})

const signature = await account.signTransaction({
  gasPrice: parseGwei('20'), 
})

maxFeePerGas (optional)

Type: bigint

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

const signature = await account.signTransaction({
  maxFeePerGas: parseGwei('20'), 
})

const signature = await account.signTransaction({
  maxFeePerGas: parseGwei('20'), 
})

maxPriorityFeePerGas (optional)

Type: bigint

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

const signature = await account.signTransaction({
  maxPriorityFeePerGas: parseGwei('3'), 
})

const signature = await account.signTransaction({
  maxPriorityFeePerGas: parseGwei('3'), 
})

nonce (optional)

Type: number

Unique number identifying this transaction.

const signature = await account.signTransaction({
  nonce: 69 
})

const signature = await account.signTransaction({
  nonce: 69 
})

to (optional)

Type: number

The transaction recipient.

const signature = await account.signTransaction({
  to: '0x...' 
})

const signature = await account.signTransaction({
  to: '0x...' 
})

type (optional)

Type: "legacy" | "eip2930" | "eip1559"

The transaction type.

const signature = await account.signTransaction({
  type: 'eip1559' 
})

const signature = await account.signTransaction({
  type: 'eip1559' 
})

value (optional)

Type: bigint

Value in wei sent with this transaction.

const signature = await account.signTransaction({
  value: parseEther('1'), 
})

const signature = await account.signTransaction({
  value: parseEther('1'), 
})

signTransaction (Local Account) ​

Usage ​

Custom serializer ​

Returns ​

Parameters ​

accessList (optional) ​

chainId (optional) ​

data (optional) ​

gas (optional) ​

gasPrice (optional) ​

maxFeePerGas (optional) ​

maxPriorityFeePerGas (optional) ​

nonce (optional) ​

to (optional) ​

type (optional) ​

value (optional) ​