backend.js

server.post('/validate-order', async function (req, res) {
    // console.log("Validate Order");    
    try{
        var order;
        console.log(req);
        if(req.body.event) {
            order = req.body.event.data.new;
        } else {
            order = req.body;
        }
        var result = await validateOrder(order);
        res.json(result);
    } catch(e) {
        console.log(e);
        res.status(500).json(e.toString());
    }
  })
  server.post('/payment', async function (req, res) {
    // console.log("Payment");

    res.setHeader('Access-Control-Allow-Origin', '*');
    res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');
    res.setHeader('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept');
    try {
        if (req.method == "OPTIONS") {
	    res.json("");
	    return;
        }
        var paymentReq = req.body;
        var result = await makePayment(paymentReq);
        res.json(result);
    } catch(e) {
        console.log(e);
        res.status(500).json(e.toString());
    }
  })
  server.post('/restaurant-approval', async function (req, res) {
    // console.log("Approval");
    try {
        var order;
        if(req.body.event) {
            order = req.body.event.data.new;
        } else {
            order = req.body;
        }
        var result = await restaurantApproval(order);
        res.json(result);
    } catch(e) {
        console.log(e);
        res.status(500).json(e.toString());
    }
  })
  server.post('/agent-assignment', async function (req, res) {
    // console.log("Agent Assignment");
    try {
        var order;
        if(req.body.event) {
            order = req.body.event.data.new;
        } else {
            order = req.body;
        }
        var result = await assignAgent(order);
        res.json(result);
    } catch(e) {
        console.log(e);
        res.status(500).json(e.toString());
    }
  })