gistfile1.m

NSSet *products = [NSSet setWithArray:@[@"PRODUCT"]];

[[RMStore defaultStore] requestProducts:products success:^(NSArray *products, NSArray *invalidProductIdentifiers) {

    for (int i = 0; i < [products count]; ++i)
    {
       SKProduct *p = products[i];
        NSLog(@"Product title: %@" , p.localizedTitle);
        NSLog(@"Product description: %@" , p.localizedDescription);
        NSLog(@"Product price: %@" , p.price);
        NSLog(@"Product id: %@" , p.productIdentifier);
        NSLog(@"------");
    }
   
} failure:^(NSError *error) {
    NSLog(@"Something went wrong");
}];

[[RMStore defaultStore] restoreTransactionsOnSuccess:^(NSArray *transactions){
    
    NSLog(@"Transactions restored:%@",transactions);
    
    for (int i = 0; i < [transactions count]; ++i)
    {
        SKPaymentTransaction *p = transactions[i];
        
        NSLog(@"p.payment.productIdentifier: %@" , p.payment.productIdentifier);
        
        NSLog(@"p.transactionDate: %@" , p.transactionDate);
        
        NSLog(@"------");
        
    }
    
    if([transactions count]==0)
    {
        [[RMStore defaultStore] addPayment:@"PTTPlus_1M" success:^(SKPaymentTransaction *transaction) {
            NSLog(@"Product purchased");
        } failure:^(SKPaymentTransaction *transaction, NSError *error) {
            NSLog(@"Something went wrong");
        }];
    }
    
} failure:^(NSError *error) {
    
    NSLog(@"Something went wrong");
    
}];