SKError codes

SKError.swift

@available(iOS 3.0, *)
    public enum Code : Int {

        public typealias _ErrorType = SKError

        case unknown = 0

        case clientInvalid = 1 // client is not allowed to issue the request, etc.

        case paymentCancelled = 2 // user cancelled the request, etc.

        case paymentInvalid = 3 // purchase identifier was invalid, etc.

        case paymentNotAllowed = 4 // this device is not allowed to make the payment

        @available(iOS 3.0, *)
        case storeProductNotAvailable = 5 // Product is not available in the current storefront

        @available(iOS 9.3, *)
        case cloudServicePermissionDenied = 6 // user has not allowed access to cloud service information

        @available(iOS 9.3, *)
        case cloudServiceNetworkConnectionFailed = 7 // the device could not connect to the nework

        @available(iOS 10.3, *)
        case cloudServiceRevoked = 8 // user has revoked permission to use this cloud service

        @available(iOS 12.2, *)
        case privacyAcknowledgementRequired = 9 // The user needs to acknowledge Apple's privacy policy

        @available(iOS 12.2, *)
        case unauthorizedRequestData = 10 // The app is attempting to use SKPayment's requestData property, but does not have the appropriate entitlement

        @available(iOS 12.2, *)
        case invalidOfferIdentifier = 11 // The specified subscription offer identifier is not valid

        @available(iOS 12.2, *)
        case invalidSignature = 12 // The cryptographic signature provided is not valid

        @available(iOS 12.2, *)
        case missingOfferParams = 13 // One or more parameters from SKPaymentDiscount is missing

        @available(iOS 12.2, *)
        case invalidOfferPrice = 14 // The price of the selected offer is not valid (e.g. lower than the current base subscription price)

        @available(iOS 12.2, *)
        case overlayCancelled = 15

        @available(iOS 14.0, *)
        case overlayInvalidConfiguration = 16

        @available(iOS 14.0, *)
        case overlayTimeout = 17

        @available(iOS 14.0, *)
        case ineligibleForOffer = 18 // User is not eligible for the subscription offer

        @available(iOS 14.0, *)
        case unsupportedPlatform = 19

        @available(iOS 14.5, *)
        case overlayPresentedInBackgroundScene = 20 // Client tried to present an SKOverlay in UIWindowScene not in the foreground
    }