How to return to the merchant's app after the payment authentication is completed?

REST API
1

May I ask, after the user completes the authentication in KakaoTalk, will KakaoTalk automatically redirect to the approval_url (and append the queryString parameter pg_token after the approval url)? What is the relationship between approval_url and return_custom_url?

2

Hello,

Kakao Login is provided according to the OAuth 2.0 standard specification.
Please refer to the guide below.

I’m sorry for the misunderstanding, but “approval_url” and “return_custom_url” are not provided in the specification. Could you please clarify what functionalities these terms refer to?

Concepts | Kakao Developers Concepts - Login flow

3

This is a parameter in KakaoPay. In the payment process, after the user completes the payment authentication in KakaoTalk, how can they return to the merchant’s app so that the merchant can approve the payment?

4

We apologize for any inconvenience, but the KakaoPay API-related inquiries have been moved to the KakaoPay Developer Forum. For any questions or discussions regarding the KakaoPay API, please visit the KakaoPay Developer Forum and post your inquiries there.

https://developers.kakaopay.com/forum/ - KakaoPay