Initial Version

server/controllers/paymentController.js

@@ -0,0 +1,141 @@
+const asyncErrorHandler = require('../middlewares/helpers/asyncErrorHandler');
+// const stripe = require('stripe')(process.env.STRIPE_SECRET_KEY);
+const paytm = require('paytmchecksum');
+const https = require('https');
+const Payment = require('../models/paymentModel');
+const ErrorHandler = require('../utils/errorHandler');
+const { v4: uuidv4 } = require('uuid');
+
+const axios = require('axios');
+
+exports.processPayment = asyncErrorHandler(async (req, res, next) => {
+
+    const { amount, email, phoneNo } = req.body;
+
+    var params = {};
+
+    /* initialize an array */
+    params["MID"] = process.env.PAYTM_MID;
+    params["WEBSITE"] = process.env.PAYTM_WEBSITE;
+    params["CHANNEL_ID"] = process.env.PAYTM_CHANNEL_ID;
+    params["INDUSTRY_TYPE_ID"] = process.env.PAYTM_INDUSTRY_TYPE;
+    params["ORDER_ID"] = "oid" + uuidv4();
+    params["CUST_ID"] = process.env.PAYTM_CUST_ID;
+    params["TXN_AMOUNT"] = JSON.stringify(amount);
+    // params["CALLBACK_URL"] = `${req.protocol}://${req.get("host")}/api/v1/callback`;
+    params["CALLBACK_URL"] = `https://${req.get("host")}/api/v1/callback`;
+    params["EMAIL"] = email;
+    params["MOBILE_NO"] = phoneNo;
+
+    let paytmChecksum = paytm.generateSignature(params, process.env.PAYTM_MERCHANT_KEY);
+    paytmChecksum.then(function (checksum) {
+
+        let paytmParams = {
+            ...params,
+            "CHECKSUMHASH": checksum,
+        };
+
+        res.status(200).json({
+            paytmParams
+        });
+
+    }).catch(function (error) {
+        console.log(error);
+    });
+});
+
+// Paytm Callback
+exports.paytmResponse = (req, res, next) => {
+
+    // console.log(req.body);
+
+    let paytmChecksum = req.body.CHECKSUMHASH;
+    delete req.body.CHECKSUMHASH;
+
+    let isVerifySignature = paytm.verifySignature(req.body, process.env.PAYTM_MERCHANT_KEY, paytmChecksum);
+    if (isVerifySignature) {
+        // console.log("Checksum Matched");
+
+        var paytmParams = {};
+
+        paytmParams.body = {
+            "mid": req.body.MID,
+            "orderId": req.body.ORDERID,
+        };
+
+        paytm.generateSignature(JSON.stringify(paytmParams.body), process.env.PAYTM_MERCHANT_KEY).then(function (checksum) {
+
+            paytmParams.head = {
+                "signature": checksum
+            };
+
+            /* prepare JSON string for request */
+            var post_data = JSON.stringify(paytmParams);
+
+            var options = {
+                /* for Staging */
+                hostname: 'securegw-stage.paytm.in',
+                /* for Production */
+                // hostname: 'securegw.paytm.in',
+                port: 443,
+                path: '/v3/order/status',
+                method: 'POST',
+                headers: {
+                    'Content-Type': 'application/json',
+                    'Content-Length': post_data.length
+                }
+            };
+
+            // Set up the request
+            var response = "";
+            var post_req = https.request(options, function (post_res) {
+                post_res.on('data', function (chunk) {
+                    response += chunk;
+                });
+
+                post_res.on('end', function () {
+                    let { body } = JSON.parse(response);
+                    // let status = body.resultInfo.resultStatus;
+                    // res.json(body);
+                    addPayment(body);
+                    // res.redirect(`${req.protocol}://${req.get("host")}/order/${body.orderId}`)
+                    res.redirect(`https://${req.get("host")}/order/${body.orderId}`)
+                });
+            });
+
+            // post the data
+            post_req.write(post_data);
+            post_req.end();
+        });
+
+    } else {
+        console.log("Checksum Mismatched");
+    }
+}
+
+const addPayment = async (data) => {
+    try {
+        await Payment.create(data);
+    } catch (error) {
+        console.log("Payment Failed!");
+    }
+}
+
+exports.getPaymentStatus = asyncErrorHandler(async (req, res, next) => {
+
+    const payment = await Payment.findOne({ orderId: req.params.id });
+
+    if (!payment) {
+        return next(new ErrorHandler("Payment Details Not Found", 404));
+    }
+
+    const txn = {
+        id: payment.txnId,
+        status: payment.resultInfo.resultStatus,
+    }
+
+    res.status(200).json({
+        success: true,
+        txn,
+    });
+});