Ledger topping up the gas for stuck Ethereum nonce/transaction

main.js

//
// Based on https://gist.github.com/miguelmota/62559d02a1b99cb291635de4b224349c
//

const Transport = require('@ledgerhq/hw-transport-node-hid').default

// https://github.com/LedgerHQ/ledgerjs/
// https://www.npmjs.com/package/@ledgerhq/hw-app-eth
const AppEth = require('@ledgerhq/hw-app-eth').default

// https://github.com/ethereumjs/ethereumjs-tx
const Tx = require('ethereumjs-tx').Transaction
const Web3 = require('web3')

// Use your personal Infura.io URL here
const web3 = new Web3('https://mainnet.infura.io/v3/xxx')

// Get this from etherscan IO
const STUCK_NOCE = 12

// 50 Gwei for gas should be good as writing of this
const GOOD_GAS_PRICE = 50e9

// Get your Ledger address
// Note that the derivate path "44'/60'/0'/0/0" or m/44'/60'/0' has changed between Ledger app v1 and v2
// https://github.com/gnosis/MultiSigWallet/issues/199

//const DERIVATE_PATH = "44'/60'/0'/0/0"
const DERIVATE_PATH = "m/44'/60'/0'/0"

async function main() {
  const devices = await Transport.list()
  if (devices.length === 0) throw 'No Ledger connected? Please connect Ledger to USB, unlock, open Ethereum app'

  console.log("Check your Ledger screen if the script gets stuck here")
  const transport = await Transport.create()
  const eth = new AppEth(transport)

  // https://www.npmjs.com/package/@ledgerhq/hw-app-eth#getaddress
  const addressData = await eth.getAddress(DERIVATE_PATH)
  console.log("Using address", addressData.address, "from derivate path", DERIVATE_PATH)
  const balance = await web3.eth.getBalance(addressData.address)
  console.log("We have", web3.utils.fromWei(balance, 'ether'), "ETH")

  // Construct a transaction that replaces currenc stuck TX
  // with one that sends 1 wei to yourself
  const txData = {
    nonce: web3.utils.toHex(STUCK_NOCE),
    gasLimit: web3.utils.toHex(200000),
    gasPrice: web3.utils.toHex(GOOD_GAS_PRICE),
    to: addressData.address,
    from: addressData.address,
    value: web3.utils.toHex(3), // 3 wei
  }

  console.log("Knocker off transaction parameters are", txData)

  const tx = new Tx(txData, { chain: 'mainnet'})

  console.log(tx.toJSON());

  const unsignedTx = tx.serialize().toString('hex')

  console.log("Sign the transaction on your ledger screen")
  console.log("Raw unsigned transaction", unsignedTx)
  // https://www.npmjs.com/package/@ledgerhq/hw-app-eth#signtransaction
  const sig = await eth.signTransaction(DERIVATE_PATH, unsignedTx)

  console.log("Sig", sig)
  txData.v = Buffer.from(sig.v, "hex")
  txData.r = Buffer.from(sig.r, "hex")
  txData.s = Buffer.from(sig.s, "hex")

  console.log(txData.v, txData.r, txData.s)

  console.log("Signing transaction");
  const signedTx = new Tx(txData)

  // BigNum lib cheatsheet https://github.com/indutny/bn.js/
  const gasPrice = web3.utils.toBN(signedTx.gasPrice.toString('hex'))
  const gasLimit = web3.utils.toBN(signedTx.gasLimit.toString('hex'))
  const gasCostWei = gasPrice.mul(gasLimit)
  const gasCost = web3.utils.fromWei(gasCostWei, 'ether')

  console.log("Gas price:", gasPrice.toString(), "Gas limit:", gasLimit.toString(), "Max gas cost:", gasCost, "ETH")

  console.log(signedTx, signedTx.toJSON(), signedTx.value, signedTx.getSenderAddress());
  const signedSerializedTx = signedTx.serialize().toString('hex')

  if(!signedTx.validate()) {
    throw "Signature is not valid?"
  }

  const signedByAddress = "0x" + signedTx.getSenderAddress().toString('hex');
  if(signedByAddress.toLowerCase() != addressData.address.toLowerCase()) {
    console.lo
      throw "Ledger signed transaction using wrong address:" + signedByAddress + " vs. " + addressData.address;
  }

  // Useful for debugging if signedSerializedTx gives broadcasting errors:
  // https://flightwallet.org/decode-eth-tx/
  console.log("Broadcasting the transaction", signedSerializedTx)
  const txHash = await web3.eth.sendSignedTransaction('0x' + signedSerializedTx)
  console.log("Broadcasted the transaction, view https://etherscan.io/tx/" + txHash)
}

main()

setup.md

For any questions contact me https://twitter.com/moo9000 or mikko@opensourcehacker.com

Get Node and yarn from Homebrew

brew install yarn

Pull in dependencies with Yarn

  # Ledger deps
  yarn add @ledgerhq/hw-transport-node-hid
  yarn add @ledgerhq/hw-app-eth

  # Ethereum JS core
  yarn add ethereumjs-tx
  yarn add web3

  # Some JavaScript source code transformers needed for the JavaScript features that are used
  # by JavaScript packages above, but not yet supported by Node:
  yarn add babel-cli
  yarn add babel-plugin-transform-runtime
  yarn add @babel/node

Get a personal Ethereum node endpoint from infura.io.

Get the nonce of stuck transaction from EtherScan.io.

Create and edit file main.js.

Run the script:

npx babel-node main.js

Watch EtherScan.io to see that the stuck transaction gets replaced with new one.