Google Omnichannel Integration - Custom Checkout - Razorpay

Prerequisites

Sign up for a business account with Google Pay.
Contact our Support Team and have them whitelist your UPI ID/VPA.
Verify your UPI ID/VPA details on the Google Merchant Console. Google deposits a small amount into the bank account linked to your VPA (UPI ID).
You should have already integrated the Razorpay Checkout with your application using one of the following:
- Razorpay Web Integration - Custom Checkout
- Razorpay Android Integration - Custom Checkout
Generate API Keys from the Dashboard.

Web Integration

While creating a request, there is no need to ask for vpa from your customer. The intent request is sent to the customer’s registered phone number.

Example

razorpay.createPayment({
    "key": "",
    "amount": 5000,
	  "email": "gaurav.kumar@example.com",
	  "contact": "9123456780",
	  "method": "upi",
	  "_[flow]": "intent",
    "upi_provider": "google_pay"
});

Android Integration

When the user enters the phone number, along with the Checkout fields, you need to submit method, upi_provider and _[flow] options along with the other Checkout fields as shown below:

try
{
  JSONObject data = new JSONObject();
  data.put("amount", 100000); //pass in paise (amount: 100000 equals ₹1000)
  data.put("email", "gaurav.kumar@example.com");  //customer's email address
  data.put("contact", "9876543210");  //customer's mobile number

  JSONObject notes = new JSONObject();
  notes.put("custom_field", "Make it so.");  //notes for the payment, if any
  data.put("notes", notes);

  data.put("method", "upi"); // mandatory for Omnichannel
  data.put("_[flow]", "intent"); // mandatory for Omnichannel
  data.put("upi_provider", "google_pay"); // mandatory for Omnichannel
  razorpay.submit(data, new PaymentResultWithDataListener()

  .......... // add your custom logic
}