post https://api.sandbox.deuna.io/v2/merchants/orders//refund
This endpoint creates a refund for an order identified by the order token, the refund can be: 1. Full refund, in this case it is not necessary to send the amount attribute. 2. Partial refund, you must send the amount attribute to specify that it is a partial refund, indicating the amount to be refunded. Depending on the PSP, they may be asynchronous or not, for more information review the following guide.