Introduction
Google Wallet offers a simpler and more secure alternative to access all your essentials, such as payment cards, loyalty cards, concert tickets and more using your phone. The Google Pay API provides access to physical credit, debit, or prepaid cards that have been saved to Google. It allows you to accept payments in stores, apps, or on the web.Note: The Android App for Google Pay is now called Google Wallet. Google Wallet can be used anywhere that accepts Google Pay.
Adding a Card to Google Pay
The customer creates a Google Wallet account and adds payment methods to the wallet.
The payment methods are stored in Google Servers. A list of payment methods is provided when the service is invoked.
Google severs return payment payload when the payment method is used for a transaction. The payment payload is passed to MerchantE by the merchant for processing.
Making a Purchase using Google Pay
A customer checks out on the Merchant website and uses Google Pay as payment.
Google Pay is invoked and the available payment methods are provided. The encrypted payment payload and unencrypted details are provided.
The encrypted payment payload and transaction details are sent to the Merchant.
The payment payload is sent to MerchantE for decryption and processing. The transaction is executed and the results are sent to the Merchant.
The Merchant sends the transaction receipt to the customer.
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