Refund

Number of APIs: 2

1. Operation 2: Refund PUT https://{{domain}}/api/rest/version/{{collectionVersion}}/merchant/{{merchantId}}/order/{{orderIdForRefund}}/transaction/{{refundTransactionId}}

2. Operation 1: Pay Transaction PUT https://{{domain}}/api/rest/version/{{collectionVersion}}/merchant/{{merchantId}}/order/{{orderIdForRefund}}/transaction/{{payTransactionId1}}