Web3.js 1.0 sendSignedTransaction returns error: Invalid RLP

Question

Running parity private PoA chain, using latest parity client + nodejs + web3.js 1.0

When I try to sign a transaction and then send it following web3.js 1.0 documentation (sendTransaction and sendSignedTransaction) I get the following error:

Unhandled rejection Error: Returned error: Invalid RLP. at Object.ErrorResponse (/home/simoh/node_modules/web3-core-helpers/src/errors.js:29:16) at /home/simoh/node_modules/web3-core-requestmanager/src/index.js:137:36 at XMLHttpRequest.request.onreadystatechange (/home/simoh/node_modules/web3-providers-http/src/index.js:64:13) at XMLHttpRequestEventTarget.dispatchEvent (/home/simoh/node_modules/xhr2/lib/xhr2.js:64:18) at XMLHttpRequest._setReadyState (/home/simoh/node_modules/xhr2/lib/xhr2.js:354:12) at XMLHttpRequest._onHttpResponseEnd (/home/simoh/node_modules/xhr2/lib/xhr2.js:509:12) at IncomingMessage. (/home/simoh/node_modules/xhr2/lib/xhr2.js:469:24) at emitNone (events.js:110:20) at IncomingMessage.emit (events.js:207:7) at endReadableNT (_stream_readable.js:1059:12) at _combinedTickCallback (internal/process/next_tick.js:138:11) at process._tickCallback (internal/process/next_tick.js:180:9)

This is my code:

web3.eth.accounts.signTransaction({
  nonce: 11377,
  gasPrice: '0x00',
  gasLimit: '0x2DC6C0',
  to: '0x00d4dc44dfbbcb7d8369ddcd261bdaad1872d652',
  from: account.address,
  value: '0x16345785D8A0000',
  data: '0x7f7465737432000000000000000000000000000000000000000000000000000000600057'
}, account.privateKey)
.then(function(result) {
  console.log("Results: ", result)

  web3.eth.sendSignedTransaction(result.rawTransaction)
    .on('receipt', console.log);
})

The account is defined in the following way:

var account = web3.eth.accounts.privateKeyToAccount(privateKey);

I cannot figure out what I am doing wrong.

In addition it is not very clear to me why as example for sendSignedTransaction, it is shown a method that uses 'ethereumjs-tx' which is different than the one proposed in the documentation. Using this second method with 'ethereumjs-tx' the same transaction as the code above is succesfully signed and sent.

var Tx = require('ethereumjs-tx');

var privateKey = new Buffer('private key', 'hex');

    var rawTx = {
          nonce: 11376,
          gasPrice: '0x00',
          gasLimit: '0x2DC6C0',
          to: '0x00d4dc44dfbbcb7d8369ddcd261bdaad1872d652',
          from: '0x0013a861865d784d97c57e70814b13ba94713d4e',
          value: '0x16345785D8A0000',
          data: '0x7f7465737432000000000000000000000000000000000000000000000000000000600057'
        }

    var tx = new Tx(rawTx);
    tx.sign(privateKey);
    var myString = "0x"
    var serializedTx = (tx.serialize()).toString('hex');
    myString += serializedTx
    console.log(myString);

    web3.eth.sendSignedTransaction(myString)
    .on('receipt', console.log);

Also when I use web3.eth.accounts.recoverTransaction(result.rawTransaction‌​) it is showing different public key than what's expected...

Answer 1

let send_add = send_public_address;

let recv_add = rec_public_address;

let transfer_amount = web3.toWei(data.amount, 'ether');

let nonce = web3.toHex(web3.eth.getTransactionCount(send_public_address));

var private_key = privatekey_sender.slice(2);

let gas = web3.toHex(data.gas_limit);

let gasPrice = web3.toHex(data.gas_price);

var rawTx = {

        from: send_add,

        nonce: nonce,

        gasLimit: gas,

        gasPrice: gasPrice,

        value: web3.toHex(transfer_amount),

        to: recv_add,

    };

var transaction = new tx(rawTx);

var txData = new Buffer(private_key, 'hex');

transaction.sign(txData);

var serializedTx = transaction.serialize().toString('hex');

web3.eth.sendRawTransaction('0x' + serializedTx, function (err, txHash) {

  if (txHash) {

            next(null, txHash);

        }

        else if (err && err.message) {

            next(err.message, null);

        }

        else {

            next('Unable to sendRawTransaction', null);

        }

    });