I am trying to integrate paytm payment gateway to my node.js application. Whats happening is whenever i am trying to pay through my pautm number, it sends me OTP and when i enter the OTP and cick on verify it dissappeas and the next option with card payment is being selected. Again if I try to pay with card, the payment is done successfully but it doesnot redirects me anywhere and times out.
Here is my code, please tell me what i am doing wrong.
const checksumLib = require('./paytm/checksum/checksum');
const port = 8000;
var today = new Date();
app.post('/payment', function(req, res) {
var payDetails = {
number: req.body.number,
amount: req.body.amount
};
let params = {};
params['MID'] = 'XXXXXXXXXXXXXXXXXXXXX',
params['WEBSITE'] = 'WEBSTAGING',
params['CHANNEL_ID'] = 'WEB',
params['INDUSTRY_TYPE_ID'] = 'Retail',
params['ORDER_ID'] = 'ORD' + today.getDate()+today.getHours()+today.getMinutes()+today.getSeconds(),
params['CUST_ID'] = 'CUST' + today.getDate()+today.getHours()+today.getMinutes()+today.getSeconds(),
params['TXN_AMOUNT'] = payDetails.amount,
params['CALLBACK_URL'] = 'http://localhost:' + port + '/callback',
params['MOBILE_NO'] = payDetails.number
checksumLib.genchecksum(params, 'XXXXXXXXXXXX', function(err, checksum) {
let txn_url = "https://securegw-stage.paytm.in/order/process";
let form_fields = "";
for(x in params) {
form_fields+= "<input type='hidden' name='"+x+"' value='"+params[x]+"' >"
}
form_fields += "<input type='hidden' name='CHECKSUMHASH' value='"+checksum+"' >";
res.writeHead(200, {'Content-Type': 'text/html'});
res.write('<html><head><title>Merchant Checkout Page</title></head><body><center><h1>Please do not refresh this page...</h1></center><form method="post" action="'+txn_url+'" name="f1">'+form_fields+'</form><script type="text/javascript">document.f1.submit();</script></body></html>');
res.end();
});
});
app.post('/callback', (req, res) => {
var body = '';
req.on('data', function (data) {
body += data;
});
req.on('end', function () {
var html = "";
var post_data = qs.parse(body);
// received params in callback
console.log('Callback Response: ', post_data, "\n");
// verify the checksum
var checksumhash = post_data.CHECKSUMHASH;
// delete post_data.CHECKSUMHASH;
var result = checksum_lib.verifychecksum(post_data, 'XXXXXXXXXX', checksumhash);
console.log("Checksum Result => ", result, "\n");
// Send Server-to-Server request to verify Order Status
var params = {};
params['MID'] = 'XXXXXXXXXXXXX';
params['ORDER_ID'] = 'ORD' + today.getDate()+today.getHours()+today.getMinutes()+today.getSeconds();
checksum_lib.genchecksum(params, 'PdMi4rHSpiUzccv!', function (err, checksum) {
params["CHECKSUMHASH"] = checksum;
var post_data = JSON.stringify(params);
var options = {
hostname: 'securegw-stage.paytm.in', // for staging
// hostname: 'securegw.paytm.in', // for production
port: 443,
path: '/order/status',
method: 'POST',
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
'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(){
console.log('S2S Response: ', response, "\n");
var _result = JSON.parse(response);
if(_result.STATUS == 'TXN_SUCCESS') {
res.send('payment sucess')
}else {
res.send('payment failed')
}
});
});
// post the data
post_req.write(post_data);
post_req.end();
});
});
});
