The following document states that some APIs in Storekit1 have been deprecated and that migration to Storekit2 is recommended, but I understand that Storekit2 only supports Swift. I'm currently creating an iPhone app in Objective-C, but is there a way to implement APIs equivalent to Storekit2 using a different Objective-C API? https://developer.apple.com/documentation/ios-ipados-release-notes/ios-ipados-18-release-notes#StoreKit

Please let me ask you about the following status code obtained from the AppStoreServerAPI. 3: The auto-renewable subscription is in a Billing retry period. 4: The auto-renewable subscription is in a Billing Grace Period. 5: The auto-renewable subscription is revoked. the App Store refunded the transaction or revoked it from Family Sharing. For these status codes 3 to 5, would this mean that the service has not been purchased? And will they change to a status of ‘2: The auto-renewable subscription is expired’ after a certain period of time without the payment issue being resolved?

When the user's purchase information was retrieved from Japan using the AppStoreServerAPI, I was able to obtain it with the status ‘1: The auto-renewable subscription is active.’, However, the expiry date in the Payload was the previous day. How can this be the case? Example: when the purchase information was retrieved on 10/02/2025 at 21:00:00, the expiry date for status ‘1’ was ‘2025/02/09’.

When using the AppStoreServerAPI to retrieve user purchase information or decode a Payload, The following responses occur multiple times throughout the day. If there is no error, the process is completed successfully. HTTP response code: 502 for URL What is the cause of this error occurring repeatedly? Is there still a problem with Apple's server status? The following APIs are used to acquire and decode user purchase information. 　AppStoreServerAPIClient.getAllSubscriptionStatuses 　SignedDataVerifier.verifyAndDecodeTransaction 　SignedDataVerifier.verifyAndDecodeRenewalInfo