index.js

const web3 = require('web3');
const express = require('express');
const Tx = require('ethereumjs-tx');
const config = require('./config');

const app = express();

//Infura HttpProvider Endpoint
web3js = new web3(new web3.providers.HttpProvider("https://ropsten.infura.io/v3/674c8c3bc3c64cc6bd6ce5849f05219c"));

app.get("/test", function (request, response) {
    response.send({
        test: 150
    })
});

app.get('/numVoteTest', async function (req, res) {

    var contract = new web3js.eth.Contract(config.lunchContractABI, config.contractAddressLunch);

    var returnValue = await contract.methods.numVotes().call({ from: config.contractAddressLunch });

    var gasPrice = await web3js.eth.getGasPrice(function (e, r) { console.log('Error: ', e) });

    var latestBlock = await web3js.eth.getBlock("latest");

    var rawTransaction = {
        "from": config.masterAddress,
        "gasPrice": gasPrice,
        "gasLimit": latestBlock.gasLimit,
        "to": config.contractAddressLunch,
        "data": contract.methods.numVotes().encodeABI(),
        "return value": returnValue
    }
    res.send({ rawTransaction });
})

app.get('/numVote', async function (req, res) {

    //creating contract object
    var contract = new web3js.eth.Contract(config.lunchExtendedContractABI, config.contractAddressLunchExtended);

    var returnValue = await contract.methods.numVotes().call({ from: config.contractAddressLunchExtended });

    var gasPrice = await web3js.eth.getGasPrice(function (e, r) { console.log('Error: ', e) });

    var latestBlock = await web3js.eth.getBlock("latest");

    var rawTransaction = {
        "from": config.masterAddress,
        "gasPrice": gasPrice,
        "gasLimit": latestBlock.gasLimit,
        "to": config.contractAddressLunch,
        "data": contract.methods.numVotes().encodeABI(),
        "return value": returnValue
    }
    res.send({ rawTransaction });
});

app.listen(3000, () => console.log('Example app listening on port 3000!'))