how to call deployed smartcontract with sendRawTransaction [duplicate]

Question

with this code i want to call my token smartcontract's transfer function. as per my knowledge i have to add this ".transfer(address,amount)" to data field. am i correct? also i am using web3 0.20. in this version i have to use getData right? so that will be var dataforTx = mycontract.tranfer.getData(address,amount); then add that dataforTx to data field?

var Tx = require('ethereumjs-tx'); var privateKey = new Buffer('e331b6d69882b4cb4ea581d88e0b604039a3de5967688d3dcffdd2270c0fd109', 'hex')

var rawTx = { nonce: '0x00', gasPrice: '0x09184e72a000',
gasLimit: '0x2710', to: '0x0000000000000000000000000000000000000000', value: '0x00',
****data: '0x7f7465737432000000000000000000000000000000000000000000000000000000600057' }** //how to get hex value of my dataforTx????????**

var tx = new Tx(rawTx); tx.sign(privateKey);

var serializedTx = tx.serialize();

//console.log(serializedTx.toString('hex'));

web3.eth.sendRawTransaction('0x' + serializedTx.toString('hex'), function(err, hash) { if (!err) console.log(hash); // "0x7f9fade1c0d57a7af66ab4ead79fade1c0d57a7af66ab4ead7c2c2eb7b11a91385" });

i am still not able to transfer token.it returns hash value but not reflecting any balance in other account. and if i use balanceOf then how to catch output of balanceOf function in sendRawTransaction

Answer 1

var abi=[//your abi array];

var contractAddress = "//your contract address";

var contract = web3.eth.contract(abi).at(contractAddress);


let send_add = data.send_public_address;

let recv_add = rec_public_address;

let amount = web3.toHex(transfer_amount),

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,

        amount: 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');

contract.transfer.sendTransaction(recv_add , amount , {'0x' + serializedTx}, 
function (err, txHash) {

        if (txHash) {

            next(null, txHash);

        }

        else if (err && err.message) {

            next(err.message, null);

        }

        else {

            next('Unable to sendTransaction', null);

        }

    });

Answer 2

Here I made a tutorial for this problem https://github.com/pubkey/eth-crypto/blob/master/tutorials/signed-data.md#deploy-the-contract