COMMON
- Is it possible to set query parameters in the redirect URL?
- Can I invite other users to PayPay for Developers?
- What value should I set for the value of currency parameter?
- Can the Merchant Order ID (merchantPaymentId) be duplicated?
- How do you use the "deviceId" when creating an account link QR code?
- What are the cases of payment failure?
- Tell me when deduction is conducted from users PayPay balance in the case of PreAuth & Capture.
- Is the redirect from the payment screen of Web Payment conducted only when a payment succeeds?
- Is it possible to change the "AUTHORIZED" status in PreAuth & Capture to "COMPLETED" without using API?
- What happens if payment, etc. is conducted during PayPay maintenance?
- Is the redirect from the payment screen of Web Payment conducted only when a payment succeeds?
- Tell me how to check user authorization expiration.
- Tell me how to handle the "OP_OUT_OF_SCOPE" error of Get payment details in SDK.
- What is the maximum number of multiple refunds allowed?
- The "OP_OUT_OF_SCOPE" error occurs when using the Create a QR Code API in PreAuth & Capture. How can I handle it?
- Is it possible to pay for 0 yen?
- Is it avaliable for user to use same PayPay MiniApp account on different devices?
- Can I create testing for error cases?
- Tell me how to conduct a test in a real store before going live.
- Tell me how to handle an UNAUTHORIZED error under the test environment.
- I have received an error response on API during development. Tell me how to handle it.
- Is it allowed to conduct a load/performance test in the test environment?
- Tell me how to handle API timeout.
- Tell me how to handle when API response returns CANCELED_USER.
- When trying to start up PayPay App from WebView app, not PayPay App but a login screen shows up on browser. Tell me how to start up PayPay App.
- What happens if you make payment multiple times with the same merchantPaymentId?
- In what units merchantPaymentId needs to be unique?
- Is it possible to test a payment limit?
- Is there any difference in a webhook to be received depending on balance block setting?
- There are three URLs listed on the endpoint of the specification. Which one should I use?