I am trying to send ethers from one address to another address on the ropsten network but I get the message "undefined".

Here is my code:

web3.eth.getTransactionCount(account1, (error, txCount) => {
    //build a transaction object
    const txObject = {
        nonce: web3.utils.toHex(txCount),
        to: account2,
        value: web3.utils.toHex(web3.utils.toWei('0.3', 'ether')),
        gasLimit: web3.utils.toHex(21000), 
        gasPrice: web3.utils.toHex(web3.utils.toWei('10', 'gwei'))



    //sign transaction with private key of sender
    const tx = new Tx(txObject)

    //serialize the transaction
    const serializedTransaction = tx.serialize()
    const raw ='0x' + serializedTransaction.toString('hex')

    //broadcast transaction to the network
    web3.eth.sendSignedTransaction(raw, (error, txHash) => {


Thank you for your help

Take care


  • Print the error too please. – goodvibration Jul 20 '20 at 20:10
  • thanks for replying. I get only the word "undefine" as an error – Pierre Jul 20 '20 at 20:17
  • Try to follow this example from the official documentation. – goodvibration Jul 20 '20 at 20:32
  • Thank you Goodvibration – Pierre Jul 21 '20 at 18:02

If you're not on the mainnet, you have to specify the network :

const tx = new Tx(txObject, { chain: 'ropsten'}) 

That's because your signature will differ from one network to another (protection against replay attacks, cf EIP-155 : https://github.com/ethereum/EIPs/blob/master/EIPS/eip-155.md).

  • Thank you Clement – Pierre Jul 21 '20 at 18:02

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