Unique identifier for the purchase, typically provided as {{checkoutId}}

The total amount of the transaction

The currency used for the transaction

Unique identifier for the associated order

Refund amount of transaction

Unique identifier for the merchant's refund transaction

Additional comments explaining the reason for the refund

This header should contain the appId provided by the MIS Pay system. It is used to identify your application and grant access to the "track-checkout" functionality

This header should contain the authentication token provided by the MIS Pay system. This ensures that only authorized users can access the endpoint