4. Process Payment

Use the ProcessPayment request to initiate a payment process for a given ReferenceId.

Upon completing the 3DS authentication process, the user is redirected to the endpoint specified in the Acs_CallbackUrl parameter of the InitiatePay request. The merchant receives a response containing a form object at this endpoint. The merchant must verify that form.result equals "SUCCESS" and form.response.gatewayRecommendation equals "PROCEED" to determine whether to proceed with the payment process. If both conditions are satisfied, the merchant should call the ProcessPayment API with the specified parameters.

API Edpoints

Production Endpoint

https://kwpaypg.casheer.com/COFWAY/ProcessPayment

Sandbox Endpoint

https://kwpaypgsb.casheer.com/COFWAY/ProcessPayment   

Sample Request

 {
    "ReferenceId": "xxxxxxxxxxxx",  // 15-digit reference id used in the validate request
    "MerchantId": "KW23821",        // Merchant code
     "Result": "success",             // result received in the form.result object
    "GatewayRecommendation": "PROCEED" // Gateway recommendation received in the form.result.gatewayrecommandation
}

Sample Response

  "errorCode": 0,
  "errorMessgae": "SUCCESS",
  "result": {
    "error": null,
    "gatewayEntryPoint": "WEB_SERVICES_API",
    "merchant": "",
    "order": {
      "amount": 10,
      "certainty": null,
      "creationTime": "2025-04-23T10:27:26.416Z",
      "currency": "USD",
      "id": "543839849919125",
      "status": "CAPTURED",
      "totalAuthorizedAmount": 10,
      "totalCapturedAmount": 10,
      "totalRefundedAmount": 0,
      "authenticationStatus": "AUTHENTICATION_SUCCESSFUL",
      "lastUpdatedTime": "2025-04-23T10:27:41.733+00:00",
      "merchantCategoryCode": "5399",
      "valueTransfer": null
    },
    "response": {
      "the3DSecure": null,
      "acquirerCode": "00",
      "acquirerMessage": "Approved",
      "gatewayCode": "APPROVED",
      "gatewayRecommendation": "NO_ACTION"
    },
    "result": "SUCCESS",
    "sourceOfFunds": {
      "provided": {
        "card": {
          "brand": "MASTERCARD",
          "number": "512345xxxxxx0008",
          "securityCode": null,
          "expiry": {
            "month": "1",
            "year": "39"
          }
        }
      },
      "type": "CARD"
    },
    "timeOfRecord": "2025-04-23T13:27:41.529+03:00",
    "transaction": {
      "acquirer": {
        "batch": 20250423,
        "date": "0423",
        "id": "NBK_S2I",
        "merchantId": "900459840",
        "settlementDate": "2025-04-23T00:00:00",
        "timeZone": "+0300",
        "tra": "..."
      }
    }
  }
}

Upon receiving the response from the ProcessPayment API, the merchant must verify the errorCode to determine the next steps. If the errorCode is 0, indicating a successful API call, the merchant should parse the result object and verify that result.result equals "SUCCESS" and result.response.acquirerMessage equals "APPROVED". These conditions confirm a successful payment transaction.