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Online Payment / Transaction Process

Online Payment / Transaction Process

Last updated 3 months ago

Merchant needs to prepare 3 simple and similar payment endpoint scripts to handle the payment notification from the payment gateway:

  1. Return URL: front-end or browser redirection notification, which are normally not a 100% reliable and robust channel due to unexpected network connectivity issue or client-side behavior, such as browser application crashes;

  2. Notify URL (webhook): a server-to-server back-end webhook which is more robust and crucial for payment status or order update;

  3. Callback URL (webhook): a special handler webhook to get notified on non-realtime payment status, such as “deferred status update”, change of payment status, or Fiuu Cash, which is not a realtime payment naturally.

After the normal payment flow, merchants can always send payment status query requests, which is defined in reQuery APIs (a.k.a PSQ, Payment Status Query).