deploy.js

var Web3 = require('web3');
var solc = require('solc');
var fs = require('fs');
var tx = require('ethereumjs-tx');
const web3 = new Web3(new Web3.providers.HttpProvider("https://rinkeby.infura.io/"));
deployContract();
showABI();
function deployContract() {
    web3.eth.getTransactionCount('0x7f05C32f52112acfDDD4Df5f79Aae348Ac87Ff8a').then((txnCount) => {
      console.log("txn count", txnCount);
      const source = fs.readFileSync(__dirname+'/../contracts/Rating.sol');
      const compiled = solc.compile(source.toString(), 1);
      const bytecode = compiled.contracts[':SCM'].bytecode;
      const rawContractTx = {
          from: '0x7f05C32f52112acfDDD4Df5f79Aae348Ac87Ff8a',
          nonce: web3.utils.toHex(txnCount),
          gasLimit: web3.utils.toHex(4000000),
          gasPrice: web3.utils.toHex(20000000000),
          data: '0x' + bytecode,
      };
      console.log("contract deploying...");
      sendRaw(rawContractTx);
    });
  }
  function showABI() {
    const source = fs.readFileSync(__dirname+'/../contracts/Rating.sol');
    const compiled = solc.compile(source.toString(), 1);
    const abi = compiled.contracts[':SCM'].interface;
    console.log("abi", abi);  
}
function sendRaw(rawTx) {
    var privateKey = new Buffer(process.env.PKEY, 'hex');
    var transaction = new tx(rawTx);
    transaction.sign(privateKey);
    var serializedTx = transaction.serialize().toString('hex');
    web3.eth.sendSignedTransaction(
    '0x' + serializedTx, function(err, result) {
        if(err) {
            console.log("txn err", err);
        } else {
            console.log("txn result", result);
        }
    });
}