@available(iOS 3.0, *)
open class SKProduct : NSObject {


    @available(iOS 3.0, *)
    open var localizedDescription: String { get }


    @available(iOS 3.0, *)
    open var localizedTitle: String { get }


    @available(iOS 3.0, *)
    open var price: NSDecimalNumber { get }


    @available(iOS 3.0, *)
    open var priceLocale: Locale { get }


    @available(iOS 3.0, *)
    open var productIdentifier: String { get }


    // YES if this product has content downloadable using SKDownload
    @available(iOS 6.0, *)
    open var isDownloadable: Bool { get }


    @available(iOS 6.0, *)
    open var downloadContentLengths: [NSNumber] { get }


    // Version of the downloadable content
    open var contentVersion: String { get }

    @available(iOS 6.0, *)
    open var downloadContentVersion: String { get }


    @available(iOS 11.2, *)
    open var subscriptionPeriod: SKProductSubscriptionPeriod? { get }


    @available(iOS 11.2, *)
    open var introductoryPrice: SKProductDiscount? { get }


    @available(iOS 12.0, *)
    open var subscriptionGroupIdentifier: String? { get }


    @available(iOS 12.2, *)
    open var discounts: [SKProductDiscount] { get }
}

extension SKProduct {


    @available(iOS 11.2, *)
    public enum PeriodUnit : UInt {


        case day

        case week

        case month

        case year
    }
}

@available(iOS 11.2, *)
open class SKProductSubscriptionPeriod : NSObject {


    @available(iOS 11.2, *)
    open var numberOfUnits: Int { get }


    @available(iOS 11.2, *)
    open var unit: SKProduct.PeriodUnit { get }
}

@available(iOS 11.2, *)
open class SKProductDiscount : NSObject {


    @available(iOS 11.2, *)
    open var price: NSDecimalNumber { get }


    @available(iOS 11.2, *)
    open var priceLocale: Locale { get }


    @available(iOS 12.2, *)
    open var identifier: String? { get }


    @available(iOS 11.2, *)
    open var subscriptionPeriod: SKProductSubscriptionPeriod { get }


    @available(iOS 11.2, *)
    open var numberOfPeriods: Int { get }


    @available(iOS 11.2, *)
    open var paymentMode: SKProductDiscount.PaymentMode { get }


    @available(iOS 12.2, *)
    open var type: SKProductDiscount.Type { get }
}

extension SKProductDiscount {


    @available(iOS 11.2, *)
    public enum PaymentMode : UInt {


        case payAsYouGo

        case payUpFront

        case freeTrial
    }


    @available(iOS 12.2, *)
    public enum `Type` : UInt {


        case introductory

        case subscription
    }
}