Buyer selects a product and places order within your (merchant) app.
Your app invokes UPI with required information such as, receiver VPA, amount, reference.
iOS displays Pay with Google Pay option, which is capable of handling UPI. Buyer selects Google Pay to make the transaction.
Google Pay does the transaction and presents the buyer with information about it.
If the Google Pay response status is Submitted or Succeeded, you must check with your PSP or payment aggregators to ensure that the correct order amount is paid.
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Last updated 2021-07-22 UTC.