Merge pull request #153 from Shopify/task/payment-providers

Add payment providers

Mobile Buy SDK/Mobile Buy SDK Tests/BUYClientTestBase.h

@@ -30,7 +30,6 @@
 extern NSString * const BUYShopDomain_Placeholder;
 extern NSString * const BUYAPIKey_Placeholder;
 extern NSString * const BUYAppId_Placeholder;
-extern NSString * const BUYChannelId_Placeholder;
 extern NSString * const BUYFakeCustomerToken;
 
 @interface BUYClientTestBase : XCTestCase

Mobile Buy SDK/Mobile Buy SDK Tests/BUYPaymentProviderTests.m

+//
+//  BUYPaymentProviderTests.m
+//  Mobile Buy SDK
+//
+//  Created by David Muzi on 2015-12-15.
+//  Copyright © 2015 Shopify Inc. All rights reserved.
+//
+
+@import XCTest;
+
+#import <Buy/Buy.h>
+
+#import "BUYApplePayPaymentProvider.h"
+#import "BUYWebCheckoutPaymentProvider.h"
+#import "BUYClientTestBase.h"
+#import "BUYPaymentController.h"
+#import <OHHTTPStubs/OHHTTPStubs.h>
+
+@interface BUYPaymentController ()
+- (id <BUYPaymentProvider>)providerForType:(NSString *)type;
+@end
+
+@interface BUYPaymentProviderTests : XCTestCase <BUYPaymentProviderDelegate>
+
+@property (nonatomic) NSMutableDictionary <NSString *, XCTestExpectation *> *expectations;
+@property (nonatomic) BUYModelManager *modelManager;
+
+@end
+
+@implementation BUYPaymentProviderTests
+
+- (void)setUp
+{
+	[super setUp];
+	self.modelManager = [BUYModelManager modelManager];
+	self.expectations = [@{} mutableCopy];
+}
+
+- (void)tearDown
+{
+	[super tearDown];
+	[OHHTTPStubs removeAllStubs];
+}
+
+- (BUYClient *)client
+{
+	return [[BUYClient alloc] initWithShopDomain:BUYShopDomain_Placeholder apiKey:BUYAPIKey_Placeholder appId:BUYAppId_Placeholder];
+}
+
+- (BUYCheckout *)checkout
+{
+	return [self.modelManager insertCheckoutWithJSONDictionary:nil];
+}
+
+- (void)mockRequests
+{
+	// This mocks a getShop, and createCheckout request
+	[OHHTTPStubs stubRequestsPassingTest:^BOOL(NSURLRequest * _Nonnull request) {
+		return YES;
+	} withStubResponse:^OHHTTPStubsResponse * _Nonnull(NSURLRequest * _Nonnull request) {
+		return [BUYPaymentProviderTests responseForRequest:request];
+	}];
+}
+
++ (OHHTTPStubsResponse *)responseForRequest:(NSURLRequest *)request
+{
+	NSURLComponents *components = [NSURLComponents componentsWithURL:request.URL resolvingAgainstBaseURL:NO];
+	
+	if ([components.path isEqualToString:@"/meta.json"]) {
+		return [OHHTTPStubsResponse responseWithJSONObject:@{@"id": @"123", @"country": @"US", @"currency": @"USD"} statusCode:200 headers:nil];
+	}
+	else if ([components.path isEqualToString:@"/api/checkouts.json"]) {
+		return [OHHTTPStubsResponse responseWithJSONObject:@{@"checkout":@{@"payment_due": @(99), @"web_checkout_url": @"https://example.com"}} statusCode:200 headers:nil];
+	}
+	
+	return nil;
+}
+
+#pragma mark - Apple Pay
+
+- (void)testAppleAvailability
+{
+	BUYApplePayPaymentProvider *applePay = [[BUYApplePayPaymentProvider alloc] initWithClient:self.client merchantID:@"merchant.id.1"];
+	XCTAssertTrue(applePay.isAvailable);
+	
+	BUYApplePayPaymentProvider *applePay2 = [[BUYApplePayPaymentProvider alloc] initWithClient:self.client merchantID:@""];
+	XCTAssertFalse(applePay2.isAvailable);
+}
+
+- (void)testApplePayPresentationCallbacks
+{
+	[self mockRequests];
+	
+	BUYApplePayPaymentProvider *applePay = [[BUYApplePayPaymentProvider alloc] initWithClient:self.client merchantID:@"merchant.id.1"];
+	applePay.delegate = self;
+	
+	self.expectations[@"presentController"] = [self expectationWithDescription:NSStringFromSelector(_cmd)];
+
+	[applePay startCheckout:self.checkout];
+	
+	[self waitForExpectationsWithTimeout:1 handler:^(NSError *error) {
+		XCTAssertNil(error);
+	}];
+}
+
+- (void)testApplePayProvider
+{
+	BUYApplePayPaymentProvider *applePay1 = [[BUYApplePayPaymentProvider alloc] initWithClient:self.client merchantID:@"merchant.id.1"];
+	XCTAssertEqualObjects(applePay1.merchantID, @"merchant.id.1");
+	
+	// 4 default networks should be configured
+	XCTAssertEqual(applePay1.supportedNetworks.count, 4);
+	
+	applePay1.supportedNetworks = @[PKPaymentNetworkMasterCard];
+	XCTAssertEqual(applePay1.supportedNetworks.count, 1);
+	XCTAssertEqualObjects(applePay1.supportedNetworks[0], PKPaymentNetworkMasterCard);
+}
+
+- (void)testCanShowApplePaySetup
+{
+	BUYApplePayPaymentProvider *applePay = [[BUYApplePayPaymentProvider alloc] initWithClient:self.client merchantID:@"merchant.id.1"];
+	XCTAssertTrue(applePay.canShowApplePaySetup);
+	
+	BUYApplePayPaymentProvider *applePay2 = [[BUYApplePayPaymentProvider alloc] initWithClient:self.client merchantID:@""];
+	XCTAssertFalse(applePay2.canShowApplePaySetup);
+}
+
+- (void)testFailedApplePayCallbacks
+{
+	[OHHTTPStubs stubRequestsPassingTest:^BOOL(NSURLRequest * _Nonnull request) {
+		return YES;
+	} withStubResponse:^OHHTTPStubsResponse * _Nonnull(NSURLRequest * _Nonnull request) {
+		return [OHHTTPStubsResponse responseWithJSONObject:@{} statusCode:400 headers:nil];
+	}];
+	BUYApplePayPaymentProvider *applePay = [[BUYApplePayPaymentProvider alloc] initWithClient:self.client merchantID:@"merchant.id.1"];
+	applePay.delegate = self;
+	
+	self.expectations[@"failedCheckout"] = [self expectationWithDescription:NSStringFromSelector(_cmd)];
+	self.expectations[@"failedShop"] = [self expectationWithDescription:NSStringFromSelector(_cmd)];
+	
+	[applePay startCheckout:self.checkout];
+	
+	[self waitForExpectationsWithTimeout:1 handler:^(NSError *error) {
+		XCTAssertNil(error);
+	}];
+}
+
+#pragma mark - Web
+
+- (void)testWebAvailability
+{
+	BUYWebCheckoutPaymentProvider *webProvider = [[BUYWebCheckoutPaymentProvider alloc] initWithClient:self.client];
+	XCTAssertTrue(webProvider.isAvailable);
+}
+
+- (void)testWebPresentationCallbacks
+{
+	[self mockRequests];
+	
+	BUYWebCheckoutPaymentProvider *webProvider = [[BUYWebCheckoutPaymentProvider alloc] initWithClient:self.client];
+	webProvider.delegate = self;
+	
+	self.expectations[@"presentController"] = [self expectationWithDescription:NSStringFromSelector(_cmd)];
+
+	[webProvider startCheckout:self.checkout];
+	
+	[self waitForExpectationsWithTimeout:1 handler:^(NSError *error) {
+		XCTAssertNil(error);
+	}];
+}
+
+#pragma mark - Payment Controller
+
+- (void)testPaymentController
+{
+	BUYPaymentController *controller = [[BUYPaymentController alloc] init];
+	BUYApplePayPaymentProvider *applePay1 = [[BUYApplePayPaymentProvider alloc] initWithClient:self.client merchantID:@"merchant.id.1"];
+
+	[controller addPaymentProvider:applePay1];
+	
+	XCTAssertEqual(controller.providers.count, 1);
+	
+	id <BUYPaymentProvider> provider = [controller providerForType:BUYApplePayPaymentProviderId];
+	XCTAssertEqualObjects(provider, applePay1);
+	
+	BUYWebCheckoutPaymentProvider *webProvider = [[BUYWebCheckoutPaymentProvider alloc] initWithClient:self.client];
+	[controller addPaymentProvider:webProvider];
+	
+	XCTAssertEqual(controller.providers.count, 2);
+	provider = [controller providerForType:BUYWebPaymentProviderId];
+	XCTAssertEqualObjects(provider, webProvider);
+
+	// Attempt to add an alternate Apple Pay provider
+	BUYApplePayPaymentProvider *applePay2 = [[BUYApplePayPaymentProvider alloc] initWithClient:self.client merchantID:@"merchant.id.2"];
+	[controller addPaymentProvider:applePay2];
+	XCTAssertEqual(controller.providers.count, 2);
+}
+
+- (void)testStartingPaymentWithPaymentController
+{
+	[self mockRequests];
+	
+	BUYPaymentController *controller = [[BUYPaymentController alloc] init];
+	BUYWebCheckoutPaymentProvider *webProvider = [[BUYWebCheckoutPaymentProvider alloc] initWithClient:self.client];
+	webProvider.delegate = self;
+	[controller addPaymentProvider:webProvider];
+
+	self.expectations[@"presentController"] = [self expectationWithDescription:NSStringFromSelector(_cmd)];
+
+	[controller startCheckout:self.checkout withProviderType:BUYWebPaymentProviderId];
+	
+	[self waitForExpectationsWithTimeout:1 handler:^(NSError *error) {
+		XCTAssertNil(error);
+	}];
+}
+
+#pragma mark - Payment Provider delegate
+
+- (void)paymentProvider:(id <BUYPaymentProvider>)provider wantsControllerPresented:(UIViewController *)controller
+{
+	[self.expectations[@"presentController"] fulfill];
+}
+
+- (void)paymentProviderWantsControllerDismissed:(id <BUYPaymentProvider>)provider
+{
+	
+}
+
+- (void)paymentProviderWillStartCheckout:(id <BUYPaymentProvider>)provider
+{
+	
+}
+
+- (void)paymentProviderDidDismissCheckout:(id <BUYPaymentProvider>)provider
+{
+	
+}
+
+- (void)paymentProvider:(id <BUYPaymentProvider>)provider didFailToUpdateCheckoutWithError:(NSError *)error
+{
+}
+
+- (void)paymentProvider:(id <BUYPaymentProvider>)provider didFailCheckoutWithError:(NSError *)error;
+{
+	if (self.expectations[@"failedCheckout"]) {
+		[self.expectations[@"failedCheckout"] fulfill];
+		[self.expectations removeObjectForKey:@"failedCheckout"];
+	}
+	
+	if (self.expectations[@"failedShop"]) {
+		[self.expectations[@"failedShop"] fulfill];
+		[self.expectations removeObjectForKey:@"failedShop"];
+	}
+}
+
+- (void)paymentProvider:(id <BUYPaymentProvider>)provider didCompleteCheckout:(BUYCheckout *)checkout withStatus:(BUYStatus)status
+{
+	
+}
+
+
+@end

Mobile Buy SDK/Mobile Buy SDK Tests/test_shop_data.json

@@ -5,8 +5,8 @@
 	"channel_id": "",
 	"app_id": "",
 	"merchant_id": "",
-	"customer_email": "",
-	"customer_password": "",
+	"customer_email": "asd@asd.com",
+	"customer_password": "asdasd",
 	"product_ids": [
 					"",
 					""

Mobile Buy SDK/Mobile Buy SDK.xcodeproj/project.pbxproj

@@ -73,6 +73,7 @@
 		841ADE241CB6C942000004B0 /* NSURLComponents+BUYAdditions.h in Headers */ = {isa = PBXBuildFile; fileRef = 841ADDFD1CB6C942000004B0 /* NSURLComponents+BUYAdditions.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		841ADE251CB6C942000004B0 /* NSURLComponents+BUYAdditions.m in Sources */ = {isa = PBXBuildFile; fileRef = 841ADDFE1CB6C942000004B0 /* NSURLComponents+BUYAdditions.m */; };
 		841ADE261CB6C942000004B0 /* NSURLComponents+BUYAdditions.m in Sources */ = {isa = PBXBuildFile; fileRef = 841ADDFE1CB6C942000004B0 /* NSURLComponents+BUYAdditions.m */; };
+		8443E2D11CE2917500EA08D4 /* BUYPaymentProviderTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 8443E2D01CE2917500EA08D4 /* BUYPaymentProviderTests.m */; };
 		849110311CCE708900E53B93 /* BUYArrayAdditionsTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 8491102E1CCE708900E53B93 /* BUYArrayAdditionsTests.m */; };
 		849110321CCE708900E53B93 /* BUYRegularExpressionAdditionsTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 8491102F1CCE708900E53B93 /* BUYRegularExpressionAdditionsTests.m */; };
 		849110331CCE708900E53B93 /* BUYStringAdditionsTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 849110301CCE708900E53B93 /* BUYStringAdditionsTests.m */; };
@@ -145,6 +146,24 @@
 		84B0A71E1CDD253A00253EB0 /* orders.json in Resources */ = {isa = PBXBuildFile; fileRef = 84B0A71D1CDD253A00253EB0 /* orders.json */; };
 		84B0A7201CDD261100253EB0 /* BUYSerializable.m in Sources */ = {isa = PBXBuildFile; fileRef = 84B0A71F1CDD261100253EB0 /* BUYSerializable.m */; };
 		84B0A7211CDD261100253EB0 /* BUYSerializable.m in Sources */ = {isa = PBXBuildFile; fileRef = 84B0A71F1CDD261100253EB0 /* BUYSerializable.m */; };
+		84B0A7301CE10ED900253EB0 /* BUYApplePayPaymentProvider.h in Headers */ = {isa = PBXBuildFile; fileRef = 84B0A7291CE10ED900253EB0 /* BUYApplePayPaymentProvider.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		84B0A7311CE10ED900253EB0 /* BUYApplePayPaymentProvider.h in Headers */ = {isa = PBXBuildFile; fileRef = 84B0A7291CE10ED900253EB0 /* BUYApplePayPaymentProvider.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		84B0A7321CE10ED900253EB0 /* BUYApplePayPaymentProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = 84B0A72A1CE10ED900253EB0 /* BUYApplePayPaymentProvider.m */; };
+		84B0A7331CE10ED900253EB0 /* BUYApplePayPaymentProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = 84B0A72A1CE10ED900253EB0 /* BUYApplePayPaymentProvider.m */; };
+		84B0A7341CE10ED900253EB0 /* BUYPaymentController.h in Headers */ = {isa = PBXBuildFile; fileRef = 84B0A72B1CE10ED900253EB0 /* BUYPaymentController.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		84B0A7351CE10ED900253EB0 /* BUYPaymentController.h in Headers */ = {isa = PBXBuildFile; fileRef = 84B0A72B1CE10ED900253EB0 /* BUYPaymentController.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		84B0A7361CE10ED900253EB0 /* BUYPaymentController.m in Sources */ = {isa = PBXBuildFile; fileRef = 84B0A72C1CE10ED900253EB0 /* BUYPaymentController.m */; };
+		84B0A7371CE10ED900253EB0 /* BUYPaymentController.m in Sources */ = {isa = PBXBuildFile; fileRef = 84B0A72C1CE10ED900253EB0 /* BUYPaymentController.m */; };
+		84B0A7381CE10ED900253EB0 /* BUYPaymentProvider.h in Headers */ = {isa = PBXBuildFile; fileRef = 84B0A72D1CE10ED900253EB0 /* BUYPaymentProvider.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		84B0A7391CE10ED900253EB0 /* BUYPaymentProvider.h in Headers */ = {isa = PBXBuildFile; fileRef = 84B0A72D1CE10ED900253EB0 /* BUYPaymentProvider.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		84B0A73A1CE10ED900253EB0 /* BUYWebCheckoutPaymentProvider.h in Headers */ = {isa = PBXBuildFile; fileRef = 84B0A72E1CE10ED900253EB0 /* BUYWebCheckoutPaymentProvider.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		84B0A73B1CE10ED900253EB0 /* BUYWebCheckoutPaymentProvider.h in Headers */ = {isa = PBXBuildFile; fileRef = 84B0A72E1CE10ED900253EB0 /* BUYWebCheckoutPaymentProvider.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		84B0A73C1CE10ED900253EB0 /* BUYWebCheckoutPaymentProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = 84B0A72F1CE10ED900253EB0 /* BUYWebCheckoutPaymentProvider.m */; };
+		84B0A73D1CE10ED900253EB0 /* BUYWebCheckoutPaymentProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = 84B0A72F1CE10ED900253EB0 /* BUYWebCheckoutPaymentProvider.m */; };
+		84B0A7401CE10F8100253EB0 /* BUYClient+Checkout.h in Headers */ = {isa = PBXBuildFile; fileRef = 84B0A73E1CE10F8100253EB0 /* BUYClient+Checkout.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		84B0A7411CE10F8100253EB0 /* BUYClient+Checkout.h in Headers */ = {isa = PBXBuildFile; fileRef = 84B0A73E1CE10F8100253EB0 /* BUYClient+Checkout.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		84B0A7421CE10F8100253EB0 /* BUYClient+Checkout.m in Sources */ = {isa = PBXBuildFile; fileRef = 84B0A73F1CE10F8100253EB0 /* BUYClient+Checkout.m */; };
+		84B0A7431CE10F8100253EB0 /* BUYClient+Checkout.m in Sources */ = {isa = PBXBuildFile; fileRef = 84B0A73F1CE10F8100253EB0 /* BUYClient+Checkout.m */; };
 		84CD7C2D1CC65D5A00B6EE61 /* _BUYCheckoutAttribute.h in Headers */ = {isa = PBXBuildFile; fileRef = 84CD7C2B1CC65D5500B6EE61 /* _BUYCheckoutAttribute.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		84CD7C2E1CC65D5A00B6EE61 /* _BUYCheckoutAttribute.h in Headers */ = {isa = PBXBuildFile; fileRef = 84CD7C2B1CC65D5500B6EE61 /* _BUYCheckoutAttribute.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		84CD7C2F1CC65D7B00B6EE61 /* _BUYCheckoutAttribute.m in Sources */ = {isa = PBXBuildFile; fileRef = 84CD7C2C1CC65D5500B6EE61 /* _BUYCheckoutAttribute.m */; };
@@ -565,6 +584,7 @@
 		841ADDFC1CB6C942000004B0 /* NSURL+BUYAdditions.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "NSURL+BUYAdditions.m"; sourceTree = "<group>"; };
 		841ADDFD1CB6C942000004B0 /* NSURLComponents+BUYAdditions.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "NSURLComponents+BUYAdditions.h"; sourceTree = "<group>"; };
 		841ADDFE1CB6C942000004B0 /* NSURLComponents+BUYAdditions.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "NSURLComponents+BUYAdditions.m"; sourceTree = "<group>"; };
+		8443E2D01CE2917500EA08D4 /* BUYPaymentProviderTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYPaymentProviderTests.m; sourceTree = "<group>"; };
 		8465CF441CC13CFE0010B2E6 /* Templates */ = {isa = PBXFileReference; lastKnownFileType = folder; path = Templates; sourceTree = "<group>"; };
 		8491102E1CCE708900E53B93 /* BUYArrayAdditionsTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYArrayAdditionsTests.m; sourceTree = "<group>"; };
 		8491102F1CCE708900E53B93 /* BUYRegularExpressionAdditionsTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYRegularExpressionAdditionsTests.m; sourceTree = "<group>"; };
@@ -612,6 +632,15 @@
 		8498DCC81CDD208200BD12A8 /* TestModel.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = TestModel.m; sourceTree = "<group>"; };
 		84B0A71D1CDD253A00253EB0 /* orders.json */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.json; path = orders.json; sourceTree = "<group>"; };
 		84B0A71F1CDD261100253EB0 /* BUYSerializable.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYSerializable.m; sourceTree = "<group>"; };
+		84B0A7291CE10ED900253EB0 /* BUYApplePayPaymentProvider.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYApplePayPaymentProvider.h; sourceTree = "<group>"; };
+		84B0A72A1CE10ED900253EB0 /* BUYApplePayPaymentProvider.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYApplePayPaymentProvider.m; sourceTree = "<group>"; };
+		84B0A72B1CE10ED900253EB0 /* BUYPaymentController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYPaymentController.h; sourceTree = "<group>"; };
+		84B0A72C1CE10ED900253EB0 /* BUYPaymentController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYPaymentController.m; sourceTree = "<group>"; };
+		84B0A72D1CE10ED900253EB0 /* BUYPaymentProvider.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYPaymentProvider.h; sourceTree = "<group>"; };
+		84B0A72E1CE10ED900253EB0 /* BUYWebCheckoutPaymentProvider.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYWebCheckoutPaymentProvider.h; sourceTree = "<group>"; };
+		84B0A72F1CE10ED900253EB0 /* BUYWebCheckoutPaymentProvider.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYWebCheckoutPaymentProvider.m; sourceTree = "<group>"; };
+		84B0A73E1CE10F8100253EB0 /* BUYClient+Checkout.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "BUYClient+Checkout.h"; sourceTree = "<group>"; };
+		84B0A73F1CE10F8100253EB0 /* BUYClient+Checkout.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "BUYClient+Checkout.m"; sourceTree = "<group>"; };
 		84CD7C2B1CC65D5500B6EE61 /* _BUYCheckoutAttribute.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = _BUYCheckoutAttribute.h; sourceTree = "<group>"; };
 		84CD7C2C1CC65D5500B6EE61 /* _BUYCheckoutAttribute.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = _BUYCheckoutAttribute.m; sourceTree = "<group>"; };
 		84D73BFE1CDD1931000F978A /* _BUYAddress.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = _BUYAddress.h; sourceTree = "<group>"; };
@@ -1012,6 +1041,22 @@
 			path = "Value Transformers";
 			sourceTree = "<group>";
 		};
+		84B0A7281CE10ED900253EB0 /* Payment Providers */ = {
+			isa = PBXGroup;
+			children = (
+				84B0A73E1CE10F8100253EB0 /* BUYClient+Checkout.h */,
+				84B0A73F1CE10F8100253EB0 /* BUYClient+Checkout.m */,
+				84B0A7291CE10ED900253EB0 /* BUYApplePayPaymentProvider.h */,
+				84B0A72A1CE10ED900253EB0 /* BUYApplePayPaymentProvider.m */,
+				84B0A72B1CE10ED900253EB0 /* BUYPaymentController.h */,
+				84B0A72C1CE10ED900253EB0 /* BUYPaymentController.m */,
+				84B0A72D1CE10ED900253EB0 /* BUYPaymentProvider.h */,
+				84B0A72E1CE10ED900253EB0 /* BUYWebCheckoutPaymentProvider.h */,
+				84B0A72F1CE10ED900253EB0 /* BUYWebCheckoutPaymentProvider.m */,
+			);
+			path = "Payment Providers";
+			sourceTree = "<group>";
+		};
 		906CF1AE1B8B660F001F7D5B /* PKContact Test Objects */ = {
 			isa = PBXGroup;
 			children = (
@@ -1061,6 +1106,7 @@
 				90F592FF1B0D5F4C0026B382 /* BUYObjectTests.m */,
 				849110461CCEA85C00E53B93 /* BUYObserverTests.m */,
 				8498DCC41CDD208200BD12A8 /* BUYOrderTests.m */,
+				8443E2D01CE2917500EA08D4 /* BUYPaymentProviderTests.m */,
 				8491102F1CCE708900E53B93 /* BUYRegularExpressionAdditionsTests.m */,
 				849110301CCE708900E53B93 /* BUYStringAdditionsTests.m */,
 				90F593001B0D5F4C0026B382 /* BUYTestConstants.h */,
@@ -1319,11 +1365,12 @@
 		F773749F19C77E4E0039681C /* Classes */ = {
 			isa = PBXGroup;
 			children = (
-				841ADDEA1CB6C942000004B0 /* Additions */,
 				90DA8DF11BC6A82D0027BCB7 /* Buy.h */,
+				841ADDEA1CB6C942000004B0 /* Additions */,
 				F7FDA16F19C93F6100AF4E93 /* Data */,
 				F773744419C779C20039681C /* Models */,
 				90FC31AB1B50589800AFAB51 /* Product View */,
+				84B0A7281CE10ED900253EB0 /* Payment Providers */,
 				F773744519C779C20039681C /* Utils */,
 				84980F491CB760FA00CFAB58 /* Value Transformers */,
 				BE1C4DF21AE98F8E00E21624 /* View Controllers */,
@@ -1363,6 +1410,7 @@
 				84DD129D1CC63FE600A2442D /* _BUYCollection.h in Headers */,
 				84DD12A11CC63FE600A2442D /* _BUYImageLink.h in Headers */,
 				84DD12A51CC63FE600A2442D /* _BUYOption.h in Headers */,
+				84B0A7411CE10F8100253EB0 /* BUYClient+Checkout.h in Headers */,
 				84D73C041CDD1945000F978A /* _BUYAddress.h in Headers */,
 				84DD12C31CC63FEE00A2442D /* _BUYDiscount.h in Headers */,
 				84DD12A71CC63FE600A2442D /* _BUYOptionValue.h in Headers */,
@@ -1393,8 +1441,10 @@
 				901931371BC5B9BC00D1134E /* BUYTaxLine.h in Headers */,
 				901931381BC5B9BC00D1134E /* BUYVariantSelectionViewController.h in Headers */,
 				901931391BC5B9BC00D1134E /* BUYOptionValueCell.h in Headers */,
+				84B0A7351CE10ED900253EB0 /* BUYPaymentController.h in Headers */,
 				9019313A1BC5B9BC00D1134E /* BUYImageLink.h in Headers */,
 				9019313B1BC5B9BC00D1134E /* BUYOptionValue.h in Headers */,
+				84B0A7311CE10ED900253EB0 /* BUYApplePayPaymentProvider.h in Headers */,
 				9019313C1BC5B9BC00D1134E /* BUYShop.h in Headers */,
 				9019313D1BC5B9BC00D1134E /* BUYShippingRate.h in Headers */,
 				9019313E1BC5B9BC00D1134E /* BUYApplePayAdditions.h in Headers */,
@@ -1415,6 +1465,7 @@
 				84980F2D1CB75B5E00CFAB58 /* BUYModelManagerProtocol.h in Headers */,
 				84D73C051CDD1945000F978A /* BUYAddress.h in Headers */,
 				901931451BC5B9BC00D1134E /* UIFont+BUYAdditions.h in Headers */,
+				84B0A73B1CE10ED900253EB0 /* BUYWebCheckoutPaymentProvider.h in Headers */,
 				841ADE081CB6C942000004B0 /* NSDateFormatter+BUYAdditions.h in Headers */,
 				841ADE001CB6C942000004B0 /* NSArray+BUYAdditions.h in Headers */,
 				841ADE101CB6C942000004B0 /* NSDictionary+BUYAdditions.h in Headers */,
@@ -1461,6 +1512,7 @@
 				9019316A1BC5B9BC00D1134E /* BUYSerializable.h in Headers */,
 				9A47CF041CE3A24600A6D5BA /* BUYApplePayToken.h in Headers */,
 				9019316B1BC5B9BC00D1134E /* BUYProductVariant.h in Headers */,
+				84B0A7391CE10ED900253EB0 /* BUYPaymentProvider.h in Headers */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -1481,6 +1533,7 @@
 				84DD12911CC63FE600A2442D /* _BUYOrder.h in Headers */,
 				84DD12811CC63FE600A2442D /* _BUYCart.h in Headers */,
 				84DD12851CC63FE600A2442D /* _BUYCollection.h in Headers */,
+				84B0A7401CE10F8100253EB0 /* BUYClient+Checkout.h in Headers */,
 				84D73C021CDD1944000F978A /* _BUYAddress.h in Headers */,
 				84DD12891CC63FE600A2442D /* _BUYImageLink.h in Headers */,
 				84DD128D1CC63FE600A2442D /* _BUYOption.h in Headers */,
@@ -1511,8 +1564,10 @@
 				BEB74A7D1B5564870005A300 /* BUYVariantSelectionViewController.h in Headers */,
 				BE10079B1B6165EC0031CEE7 /* BUYOptionValueCell.h in Headers */,
 				BE9A64591B503CD40033E558 /* BUYImageLink.h in Headers */,
+				84B0A7341CE10ED900253EB0 /* BUYPaymentController.h in Headers */,
 				BE9A64681B503D080033E558 /* BUYOptionValue.h in Headers */,
 				BE9A64661B503D010033E558 /* BUYShop.h in Headers */,
+				84B0A7301CE10ED900253EB0 /* BUYApplePayPaymentProvider.h in Headers */,
 				BE9A644D1B503CA20033E558 /* BUYShippingRate.h in Headers */,
 				BE9A646C1B503D180033E558 /* BUYApplePayAdditions.h in Headers */,
 				906EAE431B836DE000976165 /* BUYTheme+Additions.h in Headers */,
@@ -1533,6 +1588,7 @@
 				84980F2C1CB75B5E00CFAB58 /* BUYModelManagerProtocol.h in Headers */,
 				84D73C031CDD1944000F978A /* BUYAddress.h in Headers */,
 				841ADE131CB6C942000004B0 /* NSException+BUYAdditions.h in Headers */,
+				84B0A73A1CE10ED900253EB0 /* BUYWebCheckoutPaymentProvider.h in Headers */,
 				841ADE031CB6C942000004B0 /* NSDate+BUYAdditions.h in Headers */,
 				841ADE071CB6C942000004B0 /* NSDateFormatter+BUYAdditions.h in Headers */,
 				841ADDFF1CB6C942000004B0 /* NSArray+BUYAdditions.h in Headers */,
@@ -1579,6 +1635,7 @@
 				BE9A64651B503CFE0033E558 /* BUYSerializable.h in Headers */,
 				9A47CF031CE3A24600A6D5BA /* BUYApplePayToken.h in Headers */,
 				BE9A64631B503CF70033E558 /* BUYProductVariant.h in Headers */,
+				84B0A7381CE10ED900253EB0 /* BUYPaymentProvider.h in Headers */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -1790,6 +1847,7 @@
 				901930E91BC5B9BC00D1134E /* BUYProductVariant.m in Sources */,
 				84D9154E1CC03F1600D334FB /* BUYManagedObject.m in Sources */,
 				901930EA1BC5B9BC00D1134E /* BUYProductViewController.m in Sources */,
+				84B0A7331CE10ED900253EB0 /* BUYApplePayPaymentProvider.m in Sources */,
 				841ADE021CB6C942000004B0 /* NSArray+BUYAdditions.m in Sources */,
 				901930EC1BC5B9BC00D1134E /* BUYError.m in Sources */,
 				841ADE0E1CB6C942000004B0 /* NSDecimalNumber+BUYAdditions.m in Sources */,
@@ -1831,6 +1889,7 @@
 				901931081BC5B9BC00D1134E /* BUYRuntime.m in Sources */,
 				84DD12C21CC63FEE00A2442D /* _BUYCheckout.m in Sources */,
 				901931091BC5B9BC00D1134E /* BUYCart.m in Sources */,
+				84B0A73D1CE10ED900253EB0 /* BUYWebCheckoutPaymentProvider.m in Sources */,
 				9019310A1BC5B9BC00D1134E /* BUYPaymentButton.m in Sources */,
 				9A47CF061CE3A24600A6D5BA /* BUYApplePayToken.m in Sources */,
 				84D915521CC03F1600D334FB /* BUYModelManager.m in Sources */,
@@ -1864,7 +1923,9 @@
 				841ADE061CB6C942000004B0 /* NSDate+BUYAdditions.m in Sources */,
 				901931181BC5B9BC00D1134E /* BUYGradientView.m in Sources */,
 				901931191BC5B9BC00D1134E /* BUYViewController.m in Sources */,
+				84B0A7431CE10F8100253EB0 /* BUYClient+Checkout.m in Sources */,
 				9019311A1BC5B9BC00D1134E /* BUYImageKit.m in Sources */,
+				84B0A7371CE10ED900253EB0 /* BUYPaymentController.m in Sources */,
 				9019311C1BC5B9BC00D1134E /* BUYOption.m in Sources */,
 				84D73C081CDD194D000F978A /* _BUYAddress.m in Sources */,
 				9019311D1BC5B9BC00D1134E /* BUYClient.m in Sources */,
@@ -1907,6 +1968,7 @@
 				90F593071B0D5F4C0026B382 /* BUYCheckoutTest.m in Sources */,
 				90F593091B0D5F4C0026B382 /* BUYClientTest.m in Sources */,
 				90F5930B1B0D5F4C0026B382 /* BUYObjectTests.m in Sources */,
+				8443E2D11CE2917500EA08D4 /* BUYPaymentProviderTests.m in Sources */,
 				90F593041B0D5F4C0026B382 /* BUYIntegrationTest.m in Sources */,
 				9A102D1B1CDD1F960026CC43 /* BUYErrorTests.m in Sources */,
 				90F593081B0D5F4C0026B382 /* BUYClientTest_Storefront.m in Sources */,
@@ -1945,6 +2007,7 @@
 				BE9A64641B503CFB0033E558 /* BUYProductVariant.m in Sources */,
 				84D9154D1CC03F1600D334FB /* BUYManagedObject.m in Sources */,
 				BEB74A2E1B554E8B0005A300 /* BUYProductViewController.m in Sources */,
+				84B0A7321CE10ED900253EB0 /* BUYApplePayPaymentProvider.m in Sources */,
 				841ADE011CB6C942000004B0 /* NSArray+BUYAdditions.m in Sources */,
 				BE4734101B66C4EF00AA721A /* BUYError.m in Sources */,
 				841ADE0D1CB6C942000004B0 /* NSDecimalNumber+BUYAdditions.m in Sources */,
@@ -1986,6 +2049,7 @@
 				BE9A646F1B503D210033E558 /* BUYRuntime.m in Sources */,
 				84DD12B41CC63FEE00A2442D /* _BUYCheckout.m in Sources */,
 				BE9A644A1B503C980033E558 /* BUYCart.m in Sources */,
+				84B0A73C1CE10ED900253EB0 /* BUYWebCheckoutPaymentProvider.m in Sources */,
 				BE9A64831B503DB10033E558 /* BUYPaymentButton.m in Sources */,
 				9A47CF051CE3A24600A6D5BA /* BUYApplePayToken.m in Sources */,
 				84D915511CC03F1600D334FB /* BUYModelManager.m in Sources */,
@@ -2019,7 +2083,9 @@
 				841ADE051CB6C942000004B0 /* NSDate+BUYAdditions.m in Sources */,
 				BEB74A661B5564030005A300 /* BUYGradientView.m in Sources */,
 				BE9A64811B503D9E0033E558 /* BUYViewController.m in Sources */,
+				84B0A7421CE10F8100253EB0 /* BUYClient+Checkout.m in Sources */,
 				900E7C851B5DA559006F3C81 /* BUYImageKit.m in Sources */,
+				84B0A7361CE10ED900253EB0 /* BUYPaymentController.m in Sources */,
 				BE9A64601B503CEC0033E558 /* BUYOption.m in Sources */,
 				84D73C061CDD194D000F978A /* _BUYAddress.m in Sources */,
 				BE9A64481B503C900033E558 /* BUYClient.m in Sources */,

Mobile Buy SDK/Mobile Buy SDK/Buy.h

@@ -57,8 +57,14 @@ FOUNDATION_EXPORT const unsigned char BuyVersionString[];
 
 #import <Buy/BUYApplePayAdditions.h>
 #import <Buy/BUYApplePayHelpers.h>
+#import <Buy/BUYApplePayPaymentProvider.h>
+#import <Buy/BUYPaymentController.h>
+#import <Buy/BUYPaymentProvider.h>
+#import <Buy/BUYWebCheckoutPaymentProvider.h>
+
 #import <Buy/BUYClient.h>
 #import <Buy/BUYClient+Customers.h>
+#import <Buy/BUYClient+Checkout.h>
 #import <Buy/BUYError.h>
 #import <Buy/BUYError+BUYAdditions.h>
 #import <Buy/BUYManagedObject.h>
@@ -76,6 +82,7 @@ FOUNDATION_EXPORT const unsigned char BuyVersionString[];
 #import <Buy/BUYViewController.h>
 
 #import <Buy/NSArray+BUYAdditions.h>
+#import <Buy/NSDate+BUYAdditions.h>
 #import <Buy/NSDateFormatter+BUYAdditions.h>
 #import <Buy/NSDecimalNumber+BUYAdditions.h>
 #import <Buy/NSDictionary+BUYAdditions.h>

Mobile Buy SDK/Mobile Buy SDK/Payment Providers/BUYApplePayPaymentProvider.h

+//
+//  BUYApplePayPaymentProvider.h
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+@import UIKit;
+#import "BUYPaymentProvider.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+extern NSString *const BUYApplePayPaymentProviderId;
+
+@class BUYClient;
+
+@interface BUYApplePayPaymentProvider : NSObject <BUYPaymentProvider>
+
+/**
+ *  Initializer for Apple Pay payment provider
+ *
+ *  @param client     a `BUYClient`
+ *  @param merchantID the merchant ID for Apple Pay
+ *
+ *  @return an instance of `BUYApplePayPaymentProvider`
+ */
+- (instancetype)initWithClient:(BUYClient *)client merchantID:(NSString *)merchantID NS_DESIGNATED_INITIALIZER;
+- (instancetype)init NS_UNAVAILABLE;
+
+/**
+ *  The supported credit card payment networks.  Default values:
+ *  iOS 8.3: PKPaymentNetworkAmex, PKPaymentNetworkMasterCard, PKPaymentNetworkVisa.
+ *  iOS 9.0: PKPaymentNetworkAmex, PKPaymentNetworkDiscover, PKPaymentNetworkMasterCard, PKPaymentNetworkVisa.
+ */
+@property (nonatomic, copy) NSArray * supportedNetworks;
+
+/**
+ *  The merchant ID required for Apple Pay
+ */
+@property (nonatomic, copy, readonly) NSString * merchantID;
+
+/**
+ *  If the merchantId is set and the device support Apple Pay but no credit card is present this allows the user to add a payment pass to the Wallet.
+ *  The user is given the option to add a payment pass or continue with web checkout. Default is set to true. The Set Up Apple Pay button will, however
+ *  still only show if [PKAddPaymentPassViewController canAddPaymentPass] returns true, merchantId is set and the app is running iOS 9.0 and above.
+ */
+@property (nonatomic, assign) BOOL allowApplePaySetup;
+
+/**
+ *  Whether the device is setup to show the Apple Pay setup sheet.
+ *  `allowApplePaySetup` must be set to YES, and the `merchantId` must also be set in addition to the
+ *  device settings for this method to return YES.
+ *
+ *  @return YES if the Setup Apple Pay button should be shown
+ */
+- (BOOL)canShowApplePaySetup;
+
+@end
+
+NS_ASSUME_NONNULL_END

Mobile Buy SDK/Mobile Buy SDK/Payment Providers/BUYApplePayPaymentProvider.m

+//
+//  BUYApplePayPaymentProvider.m
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+@import PassKit;
+
+#import "BUYApplePayPaymentProvider.h"
+#import "BUYCheckout.h"
+#import "BUYApplePayHelpers.h"
+#import "BUYApplePayAdditions.h"
+#import "BUYShop.h"
+#import "BUYClient+Checkout.h"
+
+NSString *const BUYApplePayPaymentProviderId = @"BUYApplePayPaymentProviderId";
+
+@interface BUYApplePayPaymentProvider () <PKPaymentAuthorizationViewControllerDelegate>
+
+@property (nonatomic, strong) BUYShop *shop;
+@property (nonatomic, strong) BUYApplePayHelpers *applePayHelper;
+@property (nonatomic, strong) BUYCheckout *checkout;
+@property (nonatomic, assign) PKPaymentAuthorizationStatus paymentAuthorizationStatus;
+@property (nonatomic, strong) BUYClient *client;
+
+@property (nonatomic, assign) BOOL inProgress;
+
+@end
+
+@implementation BUYApplePayPaymentProvider
+
+@synthesize delegate;
+
+- (instancetype)initWithClient:(BUYClient *)client merchantID:(NSString *)merchantID
+{
+	NSParameterAssert(client);
+	NSParameterAssert(merchantID);
+	
+	self = [super init];
+	
+	if (self) {
+		_client = client;
+		_merchantID = merchantID;
+		_allowApplePaySetup = YES;
+	}
+	
+	return self;
+}
+
+- (NSUInteger)hash
+{
+	return self.identifier.hash;
+}
+
+- (BOOL)isEqual:(id)object
+{
+	return ([object isKindOfClass:[self class]] && [self.identifier isEqual:[object identifier]]);
+}
+
+- (NSString *)identifier
+{
+	return BUYApplePayPaymentProviderId;
+}
+
+- (void)startCheckout:(BUYCheckout *)checkout
+{	
+	if (self.isInProgress) {
+		return;
+	}
+	self.inProgress = YES;
+	self.checkout = checkout;
+	
+	// Default to the failure state, since cancelling a payment would not update the state and thus appear as a success
+	self.paymentAuthorizationStatus = PKPaymentAuthorizationStatusFailure;
+
+	// download the shop
+	dispatch_group_t group = dispatch_group_create();
+	
+	dispatch_group_enter(group);
+	[self.client getShop:^(BUYShop *theShop, NSError *error) {
+		
+		if (error) {
+			if ([self.delegate respondsToSelector:@selector(paymentProvider:didFailCheckoutWithError:)]) {
+				[self.delegate paymentProvider:self didFailCheckoutWithError:error];
+			}
+			[[NSNotificationCenter defaultCenter] postNotificationName:BUYPaymentProviderDidFailCheckoutNotificationKey object:self];
+		}
+		else {
+			self.shop = theShop;
+		}
+		
+		dispatch_group_leave(group);
+	}];
+	
+	dispatch_group_enter(group);
+	[self.client handleCheckout:checkout completion:^(BUYCheckout *checkout, NSError *error) {
+		if (error) {
+			if ([self.delegate respondsToSelector:@selector(paymentProvider:didFailCheckoutWithError:)]) {
+				[self.delegate paymentProvider:self didFailCheckoutWithError:error];
+			}
+			[[NSNotificationCenter defaultCenter] postNotificationName:BUYPaymentProviderDidFailCheckoutNotificationKey object:self];
+		}
+		else {
+			self.checkout = checkout;
+		}
+		
+		dispatch_group_leave(group);
+	}];
+	
+	// create the checkout on Shopify
+	dispatch_group_notify(group, dispatch_get_main_queue(), ^{
+		
+		if (self.shop && self.checkout) {
+			[self proceedWithApplePay];
+		}
+		else {
+			[self cancelCheckout];
+		}
+	});
+}
+
+- (void)cancelCheckout
+{
+	self.inProgress = NO;
+	self.checkout = nil;
+}
+
+- (BOOL)isAvailable
+{
+	// checks if the client is setup to use Apple Pay
+	// checks if device hardware is capable of using Apple Pay
+	// checks if the device has a payment card setup
+	return (self.merchantID.length &&
+			[PKPaymentAuthorizationViewController canMakePayments] &&
+			[PKPaymentAuthorizationViewController canMakePaymentsUsingNetworks:self.supportedNetworks]);
+}
+
+- (BOOL)canShowApplePaySetup
+{
+	PKPassLibrary *passLibrary = [[PKPassLibrary alloc] init];
+	if ([passLibrary respondsToSelector:@selector(canAddPaymentPassWithPrimaryAccountIdentifier:)] &&
+		// Check if the device can add a payment pass
+		[PKPaymentAuthorizationViewController canMakePayments] &&
+		// Check that Apple Pay is enabled for the merchant
+		[self.merchantID length]) {
+		return YES;
+	} else {
+		return NO;
+	}
+}
+
+- (void)proceedWithApplePay
+{
+	self.applePayHelper = [[BUYApplePayHelpers alloc] initWithClient:self.client checkout:self.checkout shop:self.shop];
+
+	PKPaymentRequest *request = [self paymentRequest];
+	request.paymentSummaryItems = [self.checkout buy_summaryItemsWithShopName:self.shop.name];
+	PKPaymentAuthorizationViewController *controller = [[PKPaymentAuthorizationViewController alloc] initWithPaymentRequest:request];
+	if (controller) {
+		controller.delegate = self;
+		[self.delegate paymentProvider:self wantsControllerPresented:controller];
+	}
+	else {
+		if ([self.delegate respondsToSelector:@selector(paymentProvider:didFailCheckoutWithError:)]) {
+			[self.delegate paymentProvider:self didFailCheckoutWithError:nil];
+		}
+		[[NSNotificationCenter defaultCenter] postNotificationName:BUYPaymentProviderDidFailCheckoutNotificationKey object:self];
+	}
+}
+
+- (PKPaymentRequest *)paymentRequest
+{
+	PKPaymentRequest *paymentRequest = [[PKPaymentRequest alloc] init];
+	
+	[paymentRequest setMerchantIdentifier:self.merchantID];
+	[paymentRequest setRequiredBillingAddressFields:PKAddressFieldAll];
+	[paymentRequest setRequiredShippingAddressFields:self.checkout.requiresShipping ? PKAddressFieldAll : PKAddressFieldEmail|PKAddressFieldPhone];
+	[paymentRequest setSupportedNetworks:self.supportedNetworks];
+	[paymentRequest setMerchantCapabilities:PKMerchantCapability3DS];
+	[paymentRequest setCountryCode:self.shop.country];
+	[paymentRequest setCurrencyCode:self.shop.currency];
+	
+	return paymentRequest;
+}
+
+- (NSArray *)supportedNetworks
+{
+	if (_supportedNetworks == nil) {
+		
+		if (&PKPaymentNetworkDiscover != NULL) {
+			self.supportedNetworks = @[PKPaymentNetworkAmex, PKPaymentNetworkMasterCard, PKPaymentNetworkVisa, PKPaymentNetworkDiscover];
+		} else {
+			self.supportedNetworks = @[PKPaymentNetworkAmex, PKPaymentNetworkMasterCard, PKPaymentNetworkVisa];
+		}
+	}
+	
+	return _supportedNetworks;
+}
+
+#pragma mark - PKPaymentAuthorizationViewControllerDelegate Methods
+
+- (void)paymentAuthorizationViewController:(PKPaymentAuthorizationViewController *)controller didAuthorizePayment:(PKPayment *)payment completion:(void (^)(PKPaymentAuthorizationStatus status))completion
+{
+	[self.applePayHelper paymentAuthorizationViewController:controller didAuthorizePayment:payment completion:^(PKPaymentAuthorizationStatus status) {
+		self.paymentAuthorizationStatus = status;
+		switch (status) {
+			case PKPaymentAuthorizationStatusFailure:
+				if ([self.delegate respondsToSelector:@selector(paymentProvider:didFailCheckoutWithError:)]) {
+					[self.delegate paymentProvider:self didFailCheckoutWithError:self.applePayHelper.lastError];
+				}
+				[[NSNotificationCenter defaultCenter] postNotificationName:BUYPaymentProviderDidFailCheckoutNotificationKey object:self];
+				break;
+				
+			case PKPaymentAuthorizationStatusInvalidShippingPostalAddress:
+				if ([self.delegate respondsToSelector:@selector(paymentProvider:didFailToUpdateCheckoutWithError:)]) {
+					[self.delegate paymentProvider:self didFailToUpdateCheckoutWithError:self.applePayHelper.lastError];
+				}
+				[[NSNotificationCenter defaultCenter] postNotificationName:BUYPaymentProviderDidFailToUpdateCheckoutNotificationKey object:self];
+				break;
+				
+			default:
+				break;
+		}
+		
+		completion(status);
+	}];
+}
+
+- (void)paymentAuthorizationViewControllerDidFinish:(PKPaymentAuthorizationViewController *)controller
+{
+	[self.delegate paymentProviderWantsControllerDismissed:self];
+	
+	BUYStatus status = (self.paymentAuthorizationStatus == PKPaymentAuthorizationStatusSuccess) ? BUYStatusComplete : BUYStatusFailed;
+	if ([self.delegate respondsToSelector:@selector(paymentProvider:didCompleteCheckout:withStatus:)]) {
+		[self.delegate paymentProvider:self didCompleteCheckout:self.checkout withStatus:status];
+	}
+	[[NSNotificationCenter defaultCenter] postNotificationName:BUYPaymentProviderDidCompleteCheckoutNotificationKey object:self];
+	
+	self.inProgress = NO;
+}
+
+- (void)paymentAuthorizationViewController:(PKPaymentAuthorizationViewController *)controller didSelectShippingMethod:(nonnull PKShippingMethod *)shippingMethod completion:(nonnull void (^)(PKPaymentAuthorizationStatus, NSArray<PKPaymentSummaryItem *> * _Nonnull))completion
+{
+	[self.applePayHelper paymentAuthorizationViewController:controller didSelectShippingMethod:shippingMethod completion:^(PKPaymentAuthorizationStatus status, NSArray<PKPaymentSummaryItem *> * _Nonnull summaryItems) {
+		if (status == PKPaymentAuthorizationStatusInvalidShippingPostalAddress) {
+			if ([self.delegate respondsToSelector:@selector(paymentProvider:didFailToUpdateCheckoutWithError:)]) {
+				[self.delegate paymentProvider:self didFailToUpdateCheckoutWithError:self.applePayHelper.lastError];
+			}
+			[[NSNotificationCenter defaultCenter] postNotificationName:BUYPaymentProviderDidFailToUpdateCheckoutNotificationKey object:self];
+		}
+		completion(status, summaryItems);
+	}];
+}
+
+-(void)paymentAuthorizationViewController:(PKPaymentAuthorizationViewController *)controller didSelectShippingAddress:(ABRecordRef)address completion:(void (^)(PKPaymentAuthorizationStatus, NSArray<PKShippingMethod *> * _Nonnull, NSArray<PKPaymentSummaryItem *> * _Nonnull))completion
+{
+	[self.applePayHelper paymentAuthorizationViewController:controller didSelectShippingAddress:address completion:^(PKPaymentAuthorizationStatus status, NSArray<PKShippingMethod *> * _Nonnull shippingMethods, NSArray<PKPaymentSummaryItem *> * _Nonnull summaryItems) {
+		if (status == PKPaymentAuthorizationStatusInvalidShippingPostalAddress) {
+			if ([self.delegate respondsToSelector:@selector(paymentProvider:didFailToUpdateCheckoutWithError:)]) {
+				[self.delegate paymentProvider:self didFailToUpdateCheckoutWithError:self.applePayHelper.lastError];
+			}
+			[[NSNotificationCenter defaultCenter] postNotificationName:BUYPaymentProviderDidFailToUpdateCheckoutNotificationKey object:self];
+		}
+		completion(status, shippingMethods, summaryItems);
+	}];
+}
+
+- (void)paymentAuthorizationViewController:(PKPaymentAuthorizationViewController *)controller didSelectShippingContact:(PKContact *)contact completion:(void (^)(PKPaymentAuthorizationStatus, NSArray<PKShippingMethod *> * _Nonnull, NSArray<PKPaymentSummaryItem *> * _Nonnull))completion
+{
+	[self.applePayHelper paymentAuthorizationViewController:controller didSelectShippingContact:contact completion:^(PKPaymentAuthorizationStatus status, NSArray<PKShippingMethod *> * _Nonnull shippingMethods, NSArray<PKPaymentSummaryItem *> * _Nonnull summaryItems) {
+		if (status == PKPaymentAuthorizationStatusInvalidShippingPostalAddress) {
+			if ([self.delegate respondsToSelector:@selector(paymentProvider:didFailToUpdateCheckoutWithError:)]) {
+				[self.delegate paymentProvider:self didFailToUpdateCheckoutWithError:self.applePayHelper.lastError];
+			}
+			[[NSNotificationCenter defaultCenter] postNotificationName:BUYPaymentProviderDidFailToUpdateCheckoutNotificationKey object:self];
+		}
+		completion(status, shippingMethods, summaryItems);
+	}];
+}
+
+@end

Mobile Buy SDK/Mobile Buy SDK/Payment Providers/BUYClient+Checkout.h

+//
+//  BUYClient+Checkout.h
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+#import <Buy/Buy.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface BUYClient (Checkout)
+
+- (NSURLSessionDataTask *)handleCheckout:(BUYCheckout *)checkout completion:(BUYDataCheckoutBlock)completion;
+
+@end
+
+NS_ASSUME_NONNULL_END

Mobile Buy SDK/Mobile Buy SDK/Payment Providers/BUYClient+Checkout.m

+//
+//  BUYClient+Checkout.m
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+#import "BUYClient+Checkout.h"
+
+@implementation BUYClient (Checkout)
+
+- (NSURLSessionDataTask *)handleCheckout:(BUYCheckout *)checkout completion:(BUYDataCheckoutBlock)completion
+{
+	if ([checkout hasToken]) {
+		return [self updateCheckout:checkout completion:completion];
+	} else {
+		return [self createCheckout:checkout completion:completion];
+	}
+}
+
+@end

Mobile Buy SDK/Mobile Buy SDK/Payment Providers/BUYPaymentController.h

+//
+//  BUYPaymentController.h
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+@import Foundation;
+#import "BUYPaymentProvider.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface BUYPaymentController : NSObject
+
+/**
+ *  The registered payment providers
+ */
+@property (nonatomic, strong, readonly) NSOrderedSet <id <BUYPaymentProvider>> *providers;
+
+/**
+ *  Register a payment provider
+ *
+ *  @param paymentProvider a payment provider
+ *
+ *  @note can only add 1 provider per type
+ */
+- (void)addPaymentProvider:(id <BUYPaymentProvider>)paymentProvider;
+
+/**
+ *  Convenience method to retrieve a BUYPaymentProvider by the identifier
+ *
+ *  @param type The identifier for the payment provider
+ *
+ *  @return The payment provider matching the given identifier
+ */
+- (id <BUYPaymentProvider> _Nullable)providerForType:(NSString *)type;
+
+/**
+ *  Start a checkout
+ *
+ *  @param checkout the `BUYCheckout` to start
+ *  @param type     the type of payment provider to use
+ */
+- (void)startCheckout:(BUYCheckout *)checkout withProviderType:(NSString *)typeIdentifier;
+
+@end
+
+NS_ASSUME_NONNULL_END

Mobile Buy SDK/Mobile Buy SDK/Payment Providers/BUYPaymentController.m

+//
+//  BUYPaymentController.m
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+#import "BUYPaymentController.h"
+
+NSString *const BUYPaymentProviderWillStartCheckoutNotificationKey = @"BUYPaymentProviderWillStartCheckoutNotificationKey";
+NSString *const BUYPaymentProviderDidDismissCheckoutNotificationKey = @"BUYPaymentProviderDidDismissCheckoutNotificationKey";
+NSString *const BUYPaymentProviderDidFailToUpdateCheckoutNotificationKey = @"BUYPaymentProviderDidFailToUpdateCheckoutNotificationKey";
+NSString *const BUYPaymentProviderDidFailCheckoutNotificationKey = @"BUYPaymentProviderDidFailCheckoutNotificationKey";
+NSString *const BUYPaymentProviderDidCompleteCheckoutNotificationKey = @"BUYPaymentProviderDidCompleteCheckoutNotificationKey";
+
+@interface BUYPaymentController ()
+@property (nonatomic, strong) NSMutableOrderedSet <id <BUYPaymentProvider>> *mutableProviders;
+@end
+
+@implementation BUYPaymentController
+
+- (void)startCheckout:(BUYCheckout *)checkout withProviderType:(NSString *)typeIdentifier;
+{
+	id <BUYPaymentProvider> provider = [self providerForType:typeIdentifier];
+	[provider startCheckout:checkout];
+}
+
+- (void)addPaymentProvider:(id <BUYPaymentProvider>)paymentProvider
+{
+	if ([self.mutableProviders containsObject:paymentProvider]) {
+		NSLog(@"Payment provider %@ has already been added", paymentProvider.identifier);
+	}
+	
+	[self.mutableProviders addObject:paymentProvider];
+}
+
+- (NSSet <id <BUYPaymentProvider>> *)providers
+{
+	return [self.mutableProviders copy];
+}
+
+- (NSMutableOrderedSet *)mutableProviders
+{
+	if (_mutableProviders == nil) {
+		_mutableProviders = [[NSMutableOrderedSet alloc] init];
+	}
+	
+	return _mutableProviders;
+}
+
+- (id <BUYPaymentProvider>)providerForType:(NSString *)type
+{
+	for (id <BUYPaymentProvider> provider in self.mutableProviders) {
+		if ([provider.identifier isEqualToString: type]) {
+			return provider;
+		}
+	}
+	
+	return nil;
+}
+
+@end

Mobile Buy SDK/Mobile Buy SDK/Payment Providers/BUYPaymentProvider.h

+//
+//  BUYPaymentProvider.h
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+@import UIKit;
+
+#import "BUYClient.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class BUYCheckout;
+@protocol BUYPaymentProvider;
+
+extern NSString *const BUYPaymentProviderWillStartCheckoutNotificationKey;
+extern NSString *const BUYPaymentProviderDidDismissCheckoutNotificationKey;
+extern NSString *const BUYPaymentProviderDidFailToUpdateCheckoutNotificationKey;
+extern NSString *const BUYPaymentProviderDidFailCheckoutNotificationKey;
+extern NSString *const BUYPaymentProviderDidCompleteCheckoutNotificationKey;
+
+@protocol BUYPaymentProviderDelegate <NSObject>
+
+@required
+
+/**
+ *  Called when a view controller needs to be presented
+ *
+ *  @param provider   the `BUYPaymentProvider`
+ *  @param controller the `UIViewController` to be presented
+ */
+- (void)paymentProvider:(id <BUYPaymentProvider>)provider wantsControllerPresented:(UIViewController *)controller;
+
+/**
+ *  Called when the view controller
+ *
+ *  @param provider   the `BUYPaymentProvider`
+ */
+- (void)paymentProviderWantsControllerDismissed:(id <BUYPaymentProvider>)provider;
+
+@optional
+
+/**
+ *  Called when the checkout process has started
+ *
+ *  @param provider   the `BUYPaymentProvider`
+ */
+- (void)paymentProviderWillStartCheckout:(id <BUYPaymentProvider>)provider;
+
+/**
+ *  Called when the checkout has been dismissed
+ *
+ *  @param provider   the `BUYPaymentProvider`
+ */
+- (void)paymentProviderDidDismissCheckout:(id <BUYPaymentProvider>)provider;
+
+/**
+ *  Called when a checkout failed to update
+ *
+ *  @param provider   the `BUYPaymentProvider`
+ *  @param error    the optional `NSError`
+ */
+- (void)paymentProvider:(id <BUYPaymentProvider>)provider didFailToUpdateCheckoutWithError:(NSError *)error;
+
+/**
+ *  Called when the checkout failed
+ *
+ *  @param provider   the `BUYPaymentProvider`
+ *  @param error    the optional `NSError`
+ */
+- (void)paymentProvider:(id <BUYPaymentProvider>)provider didFailCheckoutWithError:(NSError * _Nullable)error;
+
+/**
+ *  Called when the checkout has completed
+ *
+ *  @param provider   the `BUYPaymentProvider`
+ *  @param checkout the `BUYCheckout`
+ *  @param status   the `BUYStatus` of the checkout
+ */
+- (void)paymentProvider:(id <BUYPaymentProvider>)provider didCompleteCheckout:(BUYCheckout *)checkout withStatus:(BUYStatus)status;
+
+@end
+
+@protocol BUYPaymentProvider <NSObject>
+
+/**
+ *  Starts the checkout process
+ *
+ *  @param checkout the `BUYCheckout`
+ */
+- (void)startCheckout:(BUYCheckout *)checkout;
+
+/**
+ *  Clears the current checkout in progress
+ */
+- (void)cancelCheckout;
+
+/**
+ *  The payment type identifier
+ */
+@property (nonatomic, readonly) NSString *identifier;
+
+/**
+ * The checkout object. If checkout has started, the checkout token will be set.
+ */
+@property (nonatomic, readonly) BUYCheckout *checkout;
+
+/**
+ *  Whether the payment provider is currently available given the current device and configuration of the `BUYPaymentProvider`
+ */
+@property (nonatomic, readonly, getter=isAvailable) BOOL available;
+
+/**
+ *  Returns YES if the checkout is currently in progress.  `startPaymentForCheckout` should not be called when a checkout is already in progress
+ */
+@property (nonatomic, readonly, getter=isInProgress) BOOL inProgress;
+
+/**
+ *  Delegate to receive callback messages
+ */
+@property (nonatomic, weak) id <BUYPaymentProviderDelegate> delegate;
+
+@end
+
+NS_ASSUME_NONNULL_END

Mobile Buy SDK/Mobile Buy SDK/Payment Providers/BUYWebCheckoutPaymentProvider.h

+//
+//  BUYWebCheckoutPaymentProvider.h
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+#import <Foundation/Foundation.h>
+#import "BUYPaymentProvider.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+extern NSString * BUYSafariCallbackURLNotification;
+extern NSString * BUYURLKey;
+extern NSString * const BUYWebPaymentProviderId;
+
+@interface BUYWebCheckoutPaymentProvider : NSObject <BUYPaymentProvider>
+
+/**
+ *  Web payment provider
+ *
+ *  @param client a `BUYClient`
+ *
+ *  @return an instance of `BUYWebCheckoutPaymentProvider`
+ */
+- (instancetype)initWithClient:(BUYClient *)client NS_DESIGNATED_INITIALIZER;
+- (instancetype)init NS_UNAVAILABLE;
+
+@end
+
+NS_ASSUME_NONNULL_END

Mobile Buy SDK/Mobile Buy SDK/Payment Providers/BUYWebCheckoutPaymentProvider.m

+//
+//  BUYWebCheckoutPaymentProvider.m
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+#import "BUYWebCheckoutPaymentProvider.h"
+#import "BUYCheckout.h"
+#import "BUYClient+Checkout.h"
+
+@import SafariServices;
+
+NSString * BUYSafariCallbackURLNotification = @"kBUYSafariCallbackURLNotification";
+NSString * BUYURLKey = @"url";
+NSString * const BUYWebPaymentProviderId = @"BUYWebPaymentProviderId";
+
+static NSString *const WebCheckoutCustomerAccessToken = @"customer_access_token";
+
+@interface BUYWebCheckoutPaymentProvider () <SFSafariViewControllerDelegate>
+@property (nonatomic, strong) BUYCheckout *checkout;
+@property (nonatomic, strong) BUYClient *client;
+@end
+
+@implementation BUYWebCheckoutPaymentProvider
+
+@synthesize delegate;
+
+- (instancetype)initWithClient:(BUYClient *)client
+{
+	NSParameterAssert(client);
+	
+	self = [super init];
+	
+	if (self) {
+		_client = client;
+	}
+	
+	return self;
+}
+
+- (BOOL)isInProgress
+{
+	return (self.checkout != nil);
+}
+
+- (NSUInteger)hash
+{
+	return self.identifier.hash;
+}
+
+- (BOOL)isEqual:(id)object
+{
+	return ([object isKindOfClass:[self class]] && [self.identifier isEqual:[object identifier]]);
+}
+
+- (NSString *)identifier
+{
+	return BUYWebPaymentProviderId;
+}
+
+- (void)startCheckout:(BUYCheckout *)checkout
+{	
+	if (self.isInProgress) {
+		[[NSException exceptionWithName:NSInternalInconsistencyException reason:[NSString stringWithFormat:@"Asked to start checkout; but checkout has already started in %@", self] userInfo:nil] raise];
+	}
+	
+	self.checkout = checkout;
+	
+	[self.client handleCheckout:checkout completion:^(BUYCheckout *checkout, NSError *error) {
+		[self postCheckoutCompletion:checkout error:error];
+	}];
+}
+
+- (void)cancelCheckout
+{
+	self.checkout = nil;
+}
+
+- (void)cancelCheckoutAndNotify
+{
+	[[NSNotificationCenter defaultCenter] removeObserver:self name:BUYSafariCallbackURLNotification object:nil];
+	
+	if ([self.delegate respondsToSelector:@selector(paymentProviderDidDismissCheckout:)]) {
+		[self.delegate paymentProviderDidDismissCheckout:self];
+	}
+	[[NSNotificationCenter defaultCenter] postNotificationName:BUYPaymentProviderDidDismissCheckoutNotificationKey object:self];
+	
+	self.checkout = nil;
+}
+
+- (BOOL)isAvailable
+{
+	return YES;
+}
+
+- (void)postCheckoutCompletion:(BUYCheckout *)checkout error:(NSError *)error
+{
+	if (self.checkout && error == nil) {
+		self.checkout = checkout;
+
+		if ([self.delegate respondsToSelector:@selector(paymentProviderWillStartCheckout:)]) {
+			[self.delegate paymentProviderWillStartCheckout:self];
+		}
+		[[NSNotificationCenter defaultCenter] postNotificationName:BUYPaymentProviderWillStartCheckoutNotificationKey object:self];
+		
+		[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didReceiveCallbackURLNotification:) name:BUYSafariCallbackURLNotification object:nil];
+		
+		[self openWebCheckout:checkout];
+	}
+	else {
+		if ([self.delegate respondsToSelector:@selector(paymentProvider:didFailCheckoutWithError:)]) {
+			[self.delegate paymentProvider:self didFailCheckoutWithError:error];
+		}
+		[[NSNotificationCenter defaultCenter] postNotificationName:BUYPaymentProviderDidFailCheckoutNotificationKey object:self];
+		
+		self.checkout = nil;
+	}
+}
+
+- (void)openWebCheckout:(BUYCheckout *)checkout
+{
+	NSURL *checkoutURL = [self authenticatedWebCheckoutURL:checkout.webCheckoutURL];
+	if ([SFSafariViewController class]) {
+		
+		SFSafariViewController *safariViewController = [[SFSafariViewController alloc] initWithURL:checkoutURL];
+		safariViewController.delegate = self;
+		[self.delegate paymentProvider:self wantsControllerPresented:safariViewController];
+	}
+	else {
+		[[UIApplication sharedApplication] openURL:checkoutURL];
+	}
+}
+
+- (NSURL *)authenticatedWebCheckoutURL:(NSURL *)url
+{
+	NSString *customerToken = self.client.customerToken;
+	if (!customerToken.length) {
+		return url;
+	}
+	NSURLQueryItem *item = [NSURLQueryItem queryItemWithName:WebCheckoutCustomerAccessToken value:customerToken];
+	NSURLComponents *authenticatedComponents = [NSURLComponents componentsWithURL:url resolvingAgainstBaseURL:YES];
+	authenticatedComponents.queryItems = authenticatedComponents.queryItems ? [authenticatedComponents.queryItems arrayByAddingObject:item] : @[item];
+	return authenticatedComponents.URL;
+}
+
+#pragma mark - Web Checkout delegate methods
+
+- (void)safariViewControllerDidFinish:(SFSafariViewController *)controller;
+{
+	[self cancelCheckoutAndNotify];
+}
+
+- (void)didReceiveCallbackURLNotification:(NSNotification *)notification
+{
+	NSURL *url = notification.userInfo[BUYURLKey];
+	
+	[self.client getCompletionStatusOfCheckoutURL:url completion:^(BUYStatus status, NSError *error) {
+		
+		if ([self.delegate respondsToSelector:@selector(paymentProvider:didCompleteCheckout:withStatus:)]) {
+			[self.delegate paymentProvider:self didCompleteCheckout:self.checkout withStatus:status];
+		}
+		[[NSNotificationCenter defaultCenter] postNotificationName:BUYPaymentProviderDidCompleteCheckoutNotificationKey object:self];
+		
+		[[NSNotificationCenter defaultCenter] removeObserver:self name:BUYSafariCallbackURLNotification object:nil];
+	}];
+	
+	[self.delegate paymentProviderWantsControllerDismissed:self];
+	
+	self.checkout = nil;
+}
+
+@end

Mobile Buy SDK/Mobile Buy SDK/Static Framework/Buy.h

@@ -36,9 +36,6 @@
 #import "BUYCartLineItem.h"
 #import "BUYCheckout.h"
 #import "BUYCheckoutAttribute.h"
-#import "BUYClient+Test.h"
-#import "BUYClient.h"
-#import "BUYClient+Customers.h"
 #import "BUYCollection.h"
 #import "BUYCreditCard.h"
 #import "BUYCustomer.h"
@@ -56,7 +53,17 @@
 #import "BUYShop.h"
 #import "BUYTaxLine.h"
 
+#import "BUYApplePayHelpers.h"
+#import "BUYApplePayPaymentProvider.h"
+#import "BUYPaymentController.h"
+#import "BUYPaymentProvider.h"
+#import "BUYWebCheckoutPaymentProvider.h"
+
+#import "BUYClient.h"
+#import "BUYClient+Customers.h"
+#import "BUYClient+Checkout.h"
 #import "BUYError.h"
+#import "BUYError+BUYAdditions.h"
 #import "BUYManagedObject.h"
 #import "BUYModelManager.h"
 #import "BUYModelManagerProtocol.h"

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

@@ -35,10 +35,7 @@
 #import "BUYApplePayHelpers.h"
 #import "BUYDiscount.h"
 #import "BUYShop.h"
-
-NSString * BUYSafariCallbackURLNotification = @"kBUYSafariCallbackURLNotification";
-NSString * BUYURLKey = @"url";
-
+#import "BUYWebCheckoutPaymentProvider.h"
 
 @interface BUYViewController () <SFSafariViewControllerDelegate>