iOS in-app purchase IAP audit failed, solution
These two credential verification servers must be verified
https://buy.itunes.apple.com/verifyReceipt
https://sandbox.itunes.apple.com/verifyReceipt
Apple is still in test mode for review, but released in official mode , Generally, we check the buy first, and if it fails, then sandbox it again, and if it fails again, it will be regarded as a purchase failure.