Welcome folks today in this tutorial we will be integrating the instamojo payment gateway inside our node.js and express app. All the source code of the application is given below. A step by step youtube video is also shown below.

Get Started

In order to get started we need to install these dependencies which are given below

npm i express

npm i nodemon

npm i instamojo-nodejs

Now create your app.js file which is the starting point of the node.js application

const Insta = require("instamojo-nodejs");
const bodyParser = require("body-parser");
const express = require("express");

const API_KEY = "####yourapikey####";

const AUTH_KEY = "###yourauthkey####";

Insta.setKeys(API_KEY, AUTH_KEY);

Insta.isSandboxMode(true);


const PORT = process.env.PORT || 3000;

const app = express();

app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());

app.get("/", (req, res) => {
  res.sendfile(__dirname + "/index.html");
});


app.listen(PORT, () => {
  console.log(`App is listening on ${PORT}`);
});

const Insta = require("instamojo-nodejs");

const bodyParser = require("body-parser");

const express = require("express");

const API_KEY = "####yourapikey####";

const AUTH_KEY = "###yourauthkey####";

Insta.setKeys(API_KEY, AUTH_KEY);

Insta.isSandboxMode(true);

const PORT = process.env.PORT || 3000;

const app = express();

app.use(bodyParser.urlencoded({ extended: false }));

app.use(bodyParser.json());

app.get("/", (req, res) => {

res.sendfile(__dirname + "/index.html");

});

app.listen(PORT, () => {

console.log(`App is listening on ${PORT}`);

});

Now you need to replace your private keys and auth keys from instamojo dashboard like this

Now you need to make the index.html file for our application

<!DOCTYPE html>
<html>
  <head>
    <title>Instamojo Integration in Node.js and Express</title>
    <link
      rel="stylesheet"
      href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"
    />
  </head>
  <body>
    <div class="container">
      <h1 class="text-center">Instamojo Payment</h1>
      <form action="/pay" method="POST">
        <div class="form-group">
          <input
            type="text"
            class="form-control"
            required
            name="name"
            id=""
            placeholder="name"
          />
        </div>
        <div class="form-group">
          <input
            type="email"
            class="form-control"
            required
            name="email"
            id=""
            placeholder="email"
          />
        </div>
        <div class="form-group">
            <input
              type="number"
              class="form-control"
              required
              name="amount"
              id=""
              placeholder="amount"
            />
          </div>
        <div class="form-group">
            <button class="btn btn-danger btn-block">
                Create Payment Link
            </button>
        </div>
      </form>
    </div>
  </body>
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
</html>

<!DOCTYPE html>

<html>

<head>

<title>Instamojo Integration in Node.js and Express</title>

<link

rel="stylesheet"

href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"

</head>

<body>

<h1 class="text-center">Instamojo Payment</h1>

<input

type="text"

class="form-control"

required

name="name"

id=""

placeholder="name"

</div>

<input

type="email"

class="form-control"

required

name="email"

id=""

placeholder="email"

</div>

<input

type="number"

class="form-control"

required

name="amount"

id=""

placeholder="amount"

</div>

Create Payment Link

</button>

</div>

</form>

</div>

</body>

</html>

Now we need to make the post request to the /pay route to initiate the instamojo link

var data = new Insta.PaymentData();

const REDIRECT_URL = "http://localhost:3000/success";

data.setRedirectUrl(REDIRECT_URL);
data.send_email = "True";
data.purpose = "Test"; // REQUIRED

var data = new Insta.PaymentData();

const REDIRECT_URL = "http://localhost:3000/success";

data.setRedirectUrl(REDIRECT_URL);

data.send_email = "True";

data.purpose = "Test"; // REQUIRED

In this block of code we are setting the options such as redirect_url and also send_email option and also the purpose

app.post("/pay", (req, res) => {
  var name = req.body.name;
  var email = req.body.email;
  var amount = req.body.amount;

  data.amount = amount;
  data.name = name;
  data.email = email; // REQUIRED

  Insta.createPayment(data, function (error, response) {
    if (error) {
      // some error
    } else {
      // Payment redirection link at response.payment_request.longurl
      res.send("Please check your email to make payment")
    }
  });
});