0

I am trying to send ether from one address to another. After executing the code I am receiving an error: Cannot read property 'then' of undefined. How can I fix this? Thanks in advance.

const Web3 = require('web3')
const Tx = require('ethereumjs-tx').Transaction
const web3 = new Web3(new Web3.providers.HttpProvider('https://mainnet.infura.io/'))


const addressFrom = 'addr1'
const privateKey = Buffer.from('key', 'hex')
const addressTo = 'addr2'


const txData = {
  gasLimit: web3.utils.toHex(25000),
  gasPrice: web3.utils.toHex(10e9), 
  to: addressTo,
  from: addressFrom,
  value: web3.utils.toHex(web3.utils.toWei('0.0002', 'ether')) 
}


function sendRawTransaction(txData){
  web3.eth.getTransactionCount(addressFrom).then(txCount => {
    const newNonce = web3.utils.toHex(txCount)
    const transaction = new Tx({ ...txData, nonce: newNonce }, { chain: 'mainnet' }) 
    transaction.sign(privateKey)
    const serializedTx = transaction.serialize().toString('hex')
    return web3.eth.sendSignedTransaction('0x' + serializedTx)
  })
}

sendRawTransaction(txData).then(result =>
  result
    .on('transactionHash', txHash => {
      console.log('transactionHash:', txHash)
    })
    .on('receipt', receipt => {
      console.log('receipt:', receipt)
    })
    .on('confirmation', (confirmationNumber, receipt) => {
      if (confirmationNumber >= 1) {
        console.log('confirmations:', confirmationNumber, receipt)
      }
    })
    .on('error:', error => {
      console.error(error)
    })
)
  • Can anyone help? – TaoBao Dec 4 '19 at 22:12
  • The function sendRawTransaction doesn't have a return statement so it will act like it returned undefined. Try adding return before web3.eth.GetTransactionCount(..). – Ismael Dec 5 '19 at 15:03
0

Try this:

web3.eth.getTransactionCount(addressFrom).then(txCount => {
    const newNonce = web3.utils.toHex(txCount)
    const transaction = new Tx({ ...txData, nonce: newNonce }, { chain: 'mainnet' }) 
    transaction.sign(privateKey)
    const serializedTx = transaction.serialize().toString('hex')
    web3.eth.sendSignedTransaction('0x' + serializedTx)    
    .on('transactionHash', txHash => {
        console.log('transactionHash:', txHash)
    })
    .on('receipt', receipt => {
        console.log('receipt:', receipt)
    })
    .on('confirmation', (confirmationNumber, receipt) => {
        if (confirmationNumber >= 1)
            console.log('confirmations:', confirmationNumber, receipt)
    })
    .on('error:', error => {
        console.error(error)
    })
})

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.