Create ETH wallet, make transaction, get balance etc using infura

eth.js

import Web3 from 'Web3'
var Tx = require('ethereumjs-tx');
const web3 = new Web3(`https://rinkeby.infura.io/v3/` + config.infura_api_key);

const createWallet = async () => {
	try {
		web3.eth.accounts.create((err, createdAcc) => {
			if (err === null)
				return {success: true, data: {
						addr: createdAcc.address,
						privateKey1: createdAcc.privateKey.substr(2),
						privateKey2: createdAcc.privateKey.substr(2)
					}};
			else throw {success: false, error: {message: "Wallet not created", stack: err}};
		})
	} catch (e) {
		console.log(e);
		return e;
	}
};

const getWallet = async (walletId) => {
	try {
		web3.eth.getBalance(walletId, (err, balance) => {
			if (err === null)
				return {success: true, data: {balance: web3.utils.fromWei(balance, 'ether'), address: walletId}};
			else throw {success: false, error: {message: "Unable to fetch Balance", stack: err}}
		});
	} catch (ex) {
		console.log(ex);
		return ex;
	}
};

const send = async (address, receiver, amount, pvKey) => {
	try {
		var privateKey = Buffer.from(pvKey, 'hex');
		web3.eth.getTransactionCount(address, (err, txnCount) => {
			if (!err) {
				const txObject = {
					nonce: web3.utils.toHex(txnCount),
					to: receiver,
					value: web3.utils.toHex(web3.utils.toWei(amount, 'ether')),
					gasLimit: web3.utils.toHex(21000),
					gasPrice: web3.utils.toHex(web3.utils.toWei('10', 'gwei'))

				};

				const tx = new Tx(txObject);
				tx.sign(privateKey);

				const serializedTx = tx.serialize();
				const raw = '0x' + serializedTx.toString('hex');

				web3.eth.sendSignedTransaction(raw, (err, txnHash) => {
					if (!err)
						return {success: true, data: {txn: txnHash}};
					else throw {success: false, error: {message: "Unable to transfer", stack: err}}
				})
			} else throw {success: false, error: {message: "Unable to get nounce", stack: err}}
		});
	} catch (ex) {
		console.error(ex);
		return ex;
	}
};

const getTxnDetails = async (txn) => {
	try {
		web3.eth.getTransactionReceipt(txn, (err, reciept) =>{
			if(!err)
				return {success: true, data:{receipt:reciept}};
			else throw {success: false, error:{message: "Unable to find transaction", stack:err}}
		})
	} catch (ex) {
		console.log(ex);
		return ex;
	}
};