post https://api-sandbox.y.uno/v1/payments//transactions//refund
This service allows you to create refunds of an existing payment. If the amount field was filled, it will create a partial refund, otherwise it will create a complete refund.
Creating a new refund will refund a charge that was previously created but not yet refunded. The funds will be refunded to the payment method that was originally charged.
Note that this request requires an X-Idempotency-Key. Check the Authentication page for more information.