Open Payment Window

This step invokes the payment window to proceed with authentication for each payment method. Upon successful authentication, the result is sent via a POST request to the returnUrl specified during transaction registration.

[Image of payment window UI]

Important Constraints

1. No iFrames: Do not use iFrames. Some card issuers blocking iFrame requests may cause payment failures.
2. Minimum Window Size: To prevent the screen from appearing broken, ensure the window meets the minimum size requirements (width * height) for each issuer.

• Samsung : 410 * 450
• Hyundai : 390 * 450
• Lotte : 650 * 490
• Shinhan : 400 * 440
• Hana : 620 * 500
• KB Kookmin : 460 * 550
• Woori : 600 * 517
• BC : 500 * 400
• Citi : 640 * 480
• Overseas : 620 * 460

Request

Open the URL obtained from the Transaction Registration API via a browser (GET).

Request URL

GET {Payment Window URL}
Content-type: text/html

Response (Callback to returnUrl)

The following parameters are sent to your returnUrl upon successful authentication.

Parameters

Field Name	Type	Length	Required	Description
resCd	String	4Byte	✅	Response Code (Success: “0000”)
resMsg	String	1000Byte	✅	Response Message
shopOrderNo	String	40Byte		Merchant Order No. Returns the value sent during registration.
authorizationId	String	60Byte		Authorization ID. Required for the Payment Approval Request.
shopValue1	String	64Byte		Field 1, Returns the value sent during registration.
shopValue2	String	64Byte		Field 2, Returns the value sent during registration.
shopValue3	String	32Byte		Field 3, Returns the value sent during registration.
shopValue4	String	32Byte		Field 4, Returns the value sent during registration.
shopValue5	String	64Byte		Field 5, Returns the value sent during registration.
shopValue6	String	64Byte		Field 6, Returns the value sent during registration.
shopValue7	String	64Byte		Field 7, Returns the value sent during registration.