When the Custom Currency webhook executes, it sends a JSON request body to the payment gateway. The request body contains information about the order, the method of payment, and the type of transaction being initiated. The gateway processes the request and returns a JSON response body that contains information about the results of the transaction, including whether the transaction succeeded.

The set of properties in the request and response bodies, including the subobjects, vary depending on the type of transaction. For loyalty point gateways, there are four transaction types supported: authorize, void, refund, and balance inquiry.