Validating receipts locally

Validating receipts locally

Perform receept validation immediately after your app is launched, before displaying any user interface or spawning any child processes. implement this check inMainFunction, beforeNsapplicationmainFunction is called. For additional security, you may repeat this check periodically while your application is running.

After the application is started, check whether the receipt is accurate before the user interface display or sub-process execution. The verification method must be implemented before the nsapplicationmain function is called in the main function. To be more secure, you may need to repeat verification during application running.