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- #import <Foundation/Foundation.h>
- typedef void(^IAPCompletionBlock)(BOOL success, NSInteger amount, NSError * _Nullable error);
- @interface IAPManager : NSObject
- + (instancetype _Nonnull )sharedManager;
- //- (void)fetchProducts:(nonnull NSArray<NSString *> *)productIds;
- - (void)buyProduct:(nonnull NSString *)productId completion:(IAPCompletionBlock _Nullable )completion;
- - (void)restorePurchases;
- - (void)checkUnfinishedTransactions; // 掉单处理
- @end
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