Payment via Google Pay on the site (payment page Payment Gateway side)

In case of payment with Google Pay from the site, the exchange goes as follows.

	One-phase payment	Two-phase payment
1	The user creates an order on the site and begins the payment procedure.
2	The Merchant sends to Payment Gateway a payment request: register.do.	The Merchant sends to Payment Gateway a payment request: registerPreAuth.do.
3	The merchant sends a payment request to the payment gateway
4	The customer chooses to pay via Google Pay.
5	The payment gateway exchanges payment data with the Google Pay system, after which it redirects the user to the payment result page.
6	The merchant requests from payment gateway the order payment status by passing a unique identifier that was received upon order registration in `orderId` parameter: getOrderStatusExtended.do.
7	Not applicable	To debit funds from the customer's account, the merchant needs to send to the payment gateway the order completion request. deposit.do;
8	Not applicable	The payment gateway returns the result of processing the request. The order status is not returned. To get the status of the order, an order status request should be sent to the gateway: getOrderStatusExtended.do;