1. Build Integration

Follow the steps to integrate Custom Checkout in your site:

1.1

Create an Order in Server

1.2

Fetch Payment Methods

1.3

Invoke Checkout and Pass Order Id and Other Options to it

1.3.1

Include JavaScript code in your Webpage

1.3.2

Instantiate Custom Checkout

1.3.3

Submit Payment Details

1.4

Store Fields in your Server

1.5

Verify Payment Signature

1.6

Verify Payment Status

1.1 Create an Order in Server

Order is an important step in the payment process.

An order should be created for every payment.
You can create an order using the
Orders API
. It is a server-side API call. Know how to
authenticate
Orders API.
The order_id received in the response should be passed to the checkout. This ties the Order with the payment and secures the request from being tampered.

Request Parameters

Here is the list of parameters and their description for creating an order:

receipt

optional

string Your receipt id for this order should be passed here. Maximum length is 40 characters.

notes

optional

json object Key-value pair that can be used to store additional information about the entity. Maximum 15 key-value pairs, 256 characters (maximum) each. For example, "note_key": "Beam me up Scotty”.

partial_payment

optional

boolean Indicates whether the customer can make a partial payment. Possible values:

true: The customer can make partial payments.
false (default): The customer cannot make partial payments.

mandatory

string Unique identifier of the customer. For example, cust_1Aa00000000004.

Know more about

Orders API

Error Response Parameters

The error response parameters are available in the

API Reference Guide

1.2 Fetch Payment Methods

When creating a custom checkout form, display only the activated methods to the customer. Use the below methods to fetch all payments methods available to you:

Know more about

the various payment methods

offered by Razorpay.

1.3 Invoke Checkout and Pass Order Id and Other Options to it

1.3.1 Include JavaScript code in your Webpage

Include the following script, preferably in the <head> section of your page:

<script type="text/javascript" src="https://checkout.razorpay.com/v1/razorpay.js"></script>

Handy Tips

Include the script from https://checkout.razorpay.com/v1/razorpay.js instead of serving a copy from your server. This allows the library's new updates and bug fixes to fit your application automatically.
We always maintain backward compatibility with our code.

1.3.2 Instantiate Custom Checkout

Single Instance on a Page

var razorpay = new Razorpay({
  key: '<YOUR_KEY_ID>',
    // logo, displayed in the payment processing popup
  image: 'https://i.imgur.com/n5tjHFD.jpg',
});

Multiple Instances on Same Page

If you need multiple Razorpay instances on the same page, you can globally set some of the options:

Razorpay.configure({
  key: '<YOUR_KEY_ID>',
    // logo, displayed in the payment processing popup
  image: 'https://i.imgur.com/n5tjHFD.jpg',
})
new Razorpay({}); // will inherit key and image from above.

Checkout Options

While building a custom UI for accepting payments from your customers, you should be familiar with the fields supported in the razorpay.js script.

key

mandatory

string API Key ID generated from Dashboard → Account & Settings →

API Keys

description

optional

string Description of the product shown in the Checkout form. It must start with an alphanumeric character.

image

optional

string Link to an image (usually your business logo) shown in the Checkout form. Can also be a base64 string, if loading the image from a network is not desirable.

order_id

mandatory

string Order ID generated via the

Orders API

notes

optional

object Set of key-value pairs that can be used to store additional information about the payment. It can hold a maximum of 15 key-value pairs, each 256 characters long (maximum).

1.3.3 Submit Payment Details

After creating an order and obtaining the customer's payment details, send the information to Razorpay to complete the payment. The data that needs to be submitted depends on the customer's payment method. You can do this by invoking createPayment method.

Know more about

sample codes for various payment methods

Watch Out!

The createPayment method should be called within an event listener triggered by user action to prevent the popup from being blocked. For example:

$('button').click( function (){ razorpay.createPayment(...) })

Handy Tips

Handler Function
When you use the handler function, the response object of the successful payment (razorpay_payment_id, razorpay_order_id and razorpay_signature) is submitted to the Checkout Form. You need to collect these and send them to your server.
Callback URL
When you use a callback URL, Razorpay makes a post call to the callback URL, with the razorpay_payment_id, razorpay_order_id and razorpay_signature in the response object of the successful payment (razorpay_payment_id and razorpay_order_id).

1.4 Store Fields in your Server

A successful payment returns the following fields to the Checkout form.

You need to store these fields in your server.
You can confirm the authenticity of these details by verifying the signature in the next step.

razorpay_payment_id

string Unique identifier for the payment returned by Checkout only for successful payments.

razorpay_order_id

string Unique identifier for the order returned by Checkout.

razorpay_signature

string Signature returned by the Checkout. This is used to verify the payment.

A failed payment returns an error response.

{
  "error": {
    "code": "BAD_REQUEST_ERROR",
    "description": "Authentication failed due to incorrect otp",
    "field": null,
    "source": "customer",
    "step": "payment_authentication",
    "reason": "invalid_otp",
    "metadata": {
      "payment_id": "pay_EDNBKIP31Y4jl8",
      "order_id": "order_DBJKIP31Y4jl8"
    }
  }
}

Know more about

Error Codes

1.5 Verify Payment Signature

This is a mandatory step to confirm the authenticity of the details returned to the Checkout form for successful payments.

To verify the razorpay_signature returned to you by the Checkout form:

Create a signature in your server using the following attributes:
- order_id: Retrieve the order_id from your server. Do not use the razorpay_order_id returned by Checkout.
- razorpay_payment_id: Returned by Checkout.
- key_secret: Available in your server. The key_secret that was generated from the
  Dashboard
  .

Use the SHA256 algorithm, the razorpay_payment_id and the order_id to construct a HMAC hex digest as shown below:

generated_signature = hmac_sha256(order_id + "|" + razorpay_payment_id, secret);

  if (generated_signature == razorpay_signature) {
    payment is successful
  }

If the signature you generate on your server matches the razorpay_signature returned to you by the Checkout form, the payment received is from an authentic source.

Generate Signature on Your Server

Given below is the sample code for payment signature verification:

RazorpayClient razorpay = new RazorpayClient("[YOUR_KEY_ID]", "[YOUR_KEY_SECRET]");

String secret = "EnLs21M47BllR3X8PSFtjtbd";

JSONObject options = new JSONObject();
options.put("razorpay_order_id", "order_IEIaMR65cu6nz3");
options.put("razorpay_payment_id", "pay_IH4NVgf4Dreq1l");
options.put("razorpay_signature", "0d4e745a1838664ad6c9c9902212a32d627d68e917290b0ad5f08ff4561bc50f");

boolean status =  Utils.verifyPaymentSignature(options, secret);

Post Signature Verification

After you have completed the integration, you can

set up webhooks

, make test payments, replace the test key with the live key and integrate with other

APIs

1.6 Verify Payment Status

Handy Tips

On the Razorpay Dashboard, ensure that the payment status is captured. Refer to the payment capture settings page to know how to

capture payments automatically

You can track the payment status in three ways:

To verify the payment status from the Razorpay Dashboard:

Log in to the Razorpay Dashboard and navigate to Transactions → Payments.
Check if a Payment Id has been generated and note the status. In case of a successful payment, the status is marked as Captured.

Next Steps

Step 2: Test Integration