Cancels a payment in full or partially regardless of the payment method and PG.

Key parameters

imp_uid & merchant_uid

At least one of these parameters must be specified.

checksum integer

Refundable amount

The checksum is used to check whether the refundable amount is the same between the API requester and the i'mport server. If they do not match, the refund request will fail. If the checksum is null, the verification is not performed.\

amount * integer

Amount to cancel

If not specified, a full refund is requested.