Once a transaction has been completed, this API can be used to issue a refund, thereby clawing back funds from the payee and transferring them back to the payor. An optional amount can be specified to either issue a partial refund or add additional fees to the original amount. If the amount is not specified, the total transaction amount is refunded.
Token-based authentication using Authorization: Bearer <YOUR_API_KEY> provided by the GrailPay Support Team.
UUID of the transaction to refund