Updated data integrity verification feature

Seamless_Integration/app.js

@@ -1,5 +1,4 @@
 //*******SEAMLESS INTEGRATION*******//
-
 var express = require('express');
 var bodyParser = require('body-parser');
 var app = express();
@@ -12,14 +11,14 @@ var md5 = require('md5');
 
 app.use(bodyParser.json());
 
+/*
+The codes below are used to call static items if you are using css and images.
+This will allow you to access your css and images when you execute this codes in localhost
+Alternately you can create public a folder/director  '/public' to and put all our files there
+*/
 app.use('/css', express.static(path.join(__dirname, 'css')));
 app.use('/images', express.static(path.join(__dirname, 'images')));
 
-
-var merchant_id = "";//Insert merchant id here
-var orderid = ""; // Order ID should be random generated by merchant function
-var vkey = "**************"; //Replace ********** with your MOLPay verification_Key
-
 var enviroment = "sandbox"; //sandbox or production
 var URL;
 
@@ -63,6 +62,13 @@ var error_code;
 var error_desc;
 var channel;
 
+var merchant_id = "";//Insert merchant id here
+var orderid = ""; // Order ID should be random generated by merchant function
+var vkey = "*************"; //Replace ********** with your MOLPay verification_Key
+var secret_key = "***********";//Replace ********** with your MOLPay Private Secret_Key
+var key0;
+var key1;
+
 // The '/' below reads from the main directory where your project is at. Just make sure your codes are in the same folder or directory
 app.get('/',  function(req, res) {
     res.sendFile(path.join(__dirname + '/index.html'));// Opens your main html file
@@ -146,6 +152,23 @@ function MolPayObj(req,res){
             error_desc,
             channel
         };
+
+        /***********************************************************
+         * To verify the data integrity sending by MOLPay
+         ************************************************************/
+        //md5 encryption
+        key0 = md5( tranID+orderid+status+domain+amount+currency );
+        key1 = md5( paydate+domain+key0+appcode+secret_key );
+
+        //control statement for verification
+        if(skey != key1){
+            status = -1; // Invalid transaction
+            console.log('Invalid');
+            // failure action. Write your script here .....
+        }else{
+            console.log('Approved');
+            //Write your script here .....
+        }
 
         console.log(response);
         res.end(JSON.stringify(response));//convert the response into JSON format and print it to '/returnurl'