KHStoreManager

// You can use delegate for result

• (void)restoreCompleted;

• (void)restoreFailed;

• (void)purchaseCompleted:(SKPaymentTransaction *)transaction;

• (void)purchaseFailed:(SKPaymentTransaction *)transaction;

// init

• (void)prepare;

// restore

• (void)restore;

// fetch SKProduct

• (void)requestProducts:(NSArray *)productIdList;

// get SKProduct

• (SKProduct *)productForId:(NSString *)productId;

// buy product

• (void)buyProduct:(SKProduct *)product;

// you can use some methods for check status

• (BOOL)isAvailableProduct:(NSString *)productId;

• (BOOL)isPurchased:(NSString *)productId;

• (BOOL)isSubscribeExpired:(NSString *)productId;

• (BOOL)isSubscribed;

• (NSDate *)subscribedDate;

// get available SKProducts

• (NSArray *)availableProducts;