ERC20 airdrop using web3

gistfile1.txt

var fs = require('fs');
var parse = require('csv-parse');
var Web3 = require('web3');
var abi = require('./abi.json');
var _ = require('lodash');
const Tx = require('ethereumjs-tx');


var web3 = new Web3(new Web3.providers.HttpProvider("https://ropsten.infura.io/scure_key"));
//var inputFile = 'data.csv';
var inputFile = 'smalldata.csv';

const main = async (addrs, tokens) => {
    console.log(`web3 version: ${web3.version}`)

    var contractJson = abi.abi;
    var tokenAddress = "0x57fdf8001d1c240d4cbfc82b2fede932960dc310";
    var myAddress = "0x7b4d9ef0740f75dbc79222a323246a3659609896";
    var privateKey = "81d4f6e4b9d628fa15a9ff98f610e87d2662348c5666a7bf0fc39edf74f27b38";
    var abiArray = abi.abi;
    var contractAddress = "0xCF3aFC7e21Da35559269F7503b843ac543392aE0";

    var count = await web3.eth.getTransactionCount(myAddress);
    console.log(`num transactions so far: ${count}`);

    var contract = new web3.eth.Contract(abiArray, contractAddress, {
        from: myAddress
    });

    var rawTransaction = {
        "from": myAddress,
        "nonce": "0x" + count.toString(16),
        "gasPrice": "0x003B9ACA00",
        "gasLimit": "0x200B20",
        "to": contractAddress,
        "value": "0x0",
        "data": contract.methods.multisend(tokenAddress, addrs, tokens).encodeABI(),
        "chainId": "0x03",
        "gas": "0x30D40"
    };

    var privKey = new Buffer(privateKey, 'hex');
    var tx = new Tx(rawTransaction);
    tx.sign(privKey);
    var serializedTx = tx.serialize();

    console.log(`Attempting to send signed tx:  ${serializedTx.toString('hex')}`);
    var receipt = await web3.eth.sendSignedTransaction('0x' + serializedTx.toString('hex'));
    console.log(`Receipt info:  ${JSON.stringify(receipt, null, '\t')}`);
}

var parser = parse({
    delimiter: ','
}, function (err, data) {
    let addressList = [];
    let tokensList = [];
    for (let i = 0; i < data.length; i++) {
        addressList.push(data[i][0]);
        tokensList.push(data[i][1]);
    }

    let addrsList = _.chunk(addressList, 2);
    let tokenList = _.chunk(tokensList, 2);

    main(addrsList[0], tokenList[0]);
});

fs.createReadStream(inputFile).pipe(parser);