This article shares a possible use case you could support, as well as a sample flow that could support the use case. This can be a helpful jumping off point as you plan your implementation.
You can create an implementation that sends a Wix Inbox confirmation email to customers that a payment was successful.
To listen for successful payments and send a confirmation email to the customer, follow this flow:
wixAppId of 1522827f-c56c-a5c9-2ac9-00f9e6ae12d3 (the Wix App ID for Pricing Plans) and extract the wixAppOrderId.wixAppOrderId as the id for the order to retrieve.order.buyer.memberId to retrieve the buyer's memberId.memberId and extract the member's loginEmail.