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Version: Next (unreleased)

Refunds

Refund and GetRefund are part of the base Provider interface, so refunds work with every provider.

Full refund​

refund, err := client.FullRefund(ctx, paymentID)

FullRefund builds a RefundRequest for you with no Amount set, which every provider treats as "refund the full remaining amount".

Partial refund​

refund, err := client.Refund(ctx, payment.NewRefundRequest(paymentID).
    WithAmount(payment.USD(500)).
    WithReason(payment.RefundReasonRequestedByCustomer))

RefundRequest.Validate() requires a non-empty PaymentID and, when Amount is set, validates it the same way PaymentRequest does.

Refund reasons​

payment.RefundReasonDuplicate
payment.RefundReasonFraudulent
payment.RefundReasonRequestedByCustomer
payment.RefundReasonOther

Reason is optional and purely informational — providers that support it attach it to their own refund record; it does not change refund behavior.

Reading refund state​

refund, err := client.GetRefund(ctx, refundID)
refund.IsSuccessful() // Status == RefundStatusSucceeded

Refund.Status is one of RefundStatusPending, RefundStatusSucceeded, RefundStatusFailed, or RefundStatusCanceled.

Errors​

A refund attempt on an already-fully-refunded payment maps to payment.ErrAlreadyRefunded. See Errors for the full sentinel list.