Merge pull request #49 from Shopify/bugfix/apple-pay

Apple Pay bug fixes

Mobile Buy SDK/Mobile Buy SDK/Utils/BUYApplePayAdditions.m

@@ -47,7 +47,7 @@
 	if (hasDiscount || [self.lineItems count] > 1) {
 		NSDecimalNumber *lineItemSubtotal = [NSDecimalNumber zero];
 		for (BUYLineItem *lineItem in self.lineItems) {
-			lineItemSubtotal = [lineItemSubtotal decimalNumberByAdding:lineItem.price];
+			lineItemSubtotal = [lineItemSubtotal decimalNumberByAdding:lineItem.linePrice];
 		}
 		[summaryItems addObject:[PKPaymentSummaryItem summaryItemWithLabel:@"CART TOTAL" amount:lineItemSubtotal]];
 	}

Mobile Buy SDK/Mobile Buy SDK/View Controllers/BUYViewController.m

@@ -117,6 +117,8 @@ NSString * BUYURLKey = @"url";
 
 - (void)startApplePayCheckout:(BUYCheckout *)checkout
 {
+	// Default to the failure state, since cancelling a payment would not update the state and thus appear as a success
+	self.paymentAuthorizationStatus = PKPaymentAuthorizationStatusFailure;
 	
 	if (self.shop == nil && self.isLoadingShop == NO) {
 		// since requests are sent serially, this will return before the checkout is created