SumUp mPOS SDK - iOS

This repository provides a native iOS SDK that enables you to integrate SumUp's proprietary card terminal(s) and its payment platform to accept credit and debit card payments (incl. VISA, MasterCard, American Express and more). SumUp's SDK communicates transparently to the card terminal(s) via Bluetooth (BLE 4.0) or an audio cable connection. Upon initiating a checkout, the SDK guides your user using appropriate screens through each step of the payment process. As part of the process, SumUp provides also the card terminal setup screen, along with the cardholder signature verification screen. The checkout result is returned with the relevant data for your records.

No sensitive card data is ever passed through to or stored on the merchant’s phone. All data is encrypted by the card terminal, which has been fully certified to the highest industry standards (PCI, EMV I & II, Visa, MasterCard & Amex).

For more information, please refer to SumUp's integration website.

Prerequisites

1. Registered for a merchant account via SumUp's country websites (or received a test account).
2. Received SumUp card terminal: Air, Air Lite, PIN+ terminal or Chip & Signature reader.
3. Requested an Affiliate (Access) Key via SumUp Dashboard for Developers.
4. Deployment Target iOS 6.0 or later.
5. Xcode 7 and iOS SDK 9 or later.
6. iPhone, iPad or iPod touch.

Table of Contents

• Installation
  • Preparing your Xcode project
  • Supported device orientation
  • Privacy Info plist keys
• Getting started
  • Authenticate app
  • Login
  • Accept card payments
  • Update checkout preferences
• Community
• Changelog
• License

Installation

Preparing your Xcode project

The SumUp SDK is provided as an embedded framework SumupSDK.embeddedframework that combines a static library, its headers and bundles containing resources such as images and localizations. Please follow the steps below to prepare your project:

1. Add the SumupSDK.embeddedframework to your Xcode project.

2. Link your app against SumupSDK.framework.

3. Link your app against the following system frameworks:

    Accelerate
    AVFoundation
    MapKit
   

4. Add -ObjC to "Other Linker Flags" if not yet included.

5. Add the bundles provided in SumupSDK.embeddedframework/Resources to your app target.

    SumupSDK.embeddedframework/Resources/SMPSharedResources.bundle
    SumupSDK.embeddedframework/Resources/YTLibResources.bundle
   

Note:
You can use the sample app that is provided with the SumUp SDK as a reference project. The Xcode project contains sample apps written in Objective-C and Swift.
In your debug setup you can also call +[SumupSDK testSDKIntegration]. It will run various checks and print its findings to the console. Please do not call it in your Release build.

Supported device orientation

The SDK supports all device orientations on iPad and portrait on iPhone. Feel free to support other orientations on iPhone but please keep in mind that the SDK's UI will be presented in portrait on iPhone. See UISupportedInterfaceOrientations in the sample app's Info.plist or the "General" tab in Xcode's Target Editor.

Privacy Info plist keys

The SumUp SDK requires access to the user's location, Bluetooth peripherals and the device's microphone. If your app has not asked for the user's permission, the SumUp SDK will ask at the time of the first login or checkout attempt. Please add the following keys to your info plist file:

    NSLocationWhenInUseUsageDescription
    NSBluetoothPeripheralUsageDescription
    NSMicrophoneUsageDescription
    NSLocationUsageDescription (only if deployment target is iOS 6 or 7)

Note:

• Please refer to the sample app's Info.plist for more information regarding the listed permissions required.
• You can provide localization by providing a localized InfoPlist.strings file.
• For further information, see the iOS Developer Library on location usage on iOS 6 and 7, iOS 8 and later, Bluetooth peripheral usage and microphone access in iOS 7 and later.

Getting started

Authenticate app

Before calling any additional feature of the SumUp SDK, you are required to set up the SDK with your Affiliate (Access) Key:

#import <SumupSDK/SumupSDK.h>

// ...

[SumupSDK setupWithAPIKey:@"MyAPIKey"];

Note: setupWithAPIKey: checks for the user's location permission. Consequently, do not call this method as part of the app launch.

Login

Following app authentication, a registered SumUp merchant account needs to be logged in. Present a login screen from your UIViewController, using the following method:

[SumupSDK presentLoginFromViewController:vc
                                animated:YES
                         completionBlock:nil];

Note: To log out of the SDK, please refer to logoutWithCompletionBlock:.

Accept card payments

Once logged in, you can start using the SumUp SDK to accept card payments.

Prepare checkout request

Prepare a checkout request that encapsulates the information regarding the transaction.

For this, you will need to create an instance SMPCheckoutRequest:

#import <SumupSDK/SumupSDK.h>

// ...

SMPCheckoutRequest *request = [SMPCheckoutRequest requestWithTotal:[NSDecimalNumber decimalNumberWithString:@"10.00"]
                                                             title:@"your title"
                                                      currencyCode:[[SumupSDK currentMerchant] currencyCode]
                                                    paymentOptions:SMPPaymentOptionAny];

Please note that you need to pass an NSDecimalNumber as the total value. While NSDecimalNumber is a subclass of NSNumber it is not advised to use the convenience method of NSNumber to create an NSDecimalNumber.

You can pass an optional transaction identifier in foreignTransactionID. This identifier will be associated with the transaction and can be used to retrieve this transaction later. See API documentation for details. Please make sure that this ID is unique within the scope of your SumUp SDK's Affiliate (Access) Key. It must not be longer than 128 characters.

// set an optional identifier
[request setForeignTransactionID:@"my-unique-id"];

Initiate Checkout Request

Start a payment by using the checkout request below:

[SumupSDK checkoutWithRequest:request
           fromViewController:vc
                   completion:^(SMPCheckoutResult *result, NSError *error) {
                   // handle completed and failed payments here
                   // retrieve information via result.additionalInfo
}];

Update checkout preferences

When logged in you can let merchants check and update their checkout preferences. Merchants can select their preferred card terminal and set up a new one if needed. The preferences available to a merchant depend on their respective account settings.

[SumupSDK presentCheckoutPreferencesFromViewController:self
                                              animated:YES
                                            completion:^(BOOL success, NSError * _Nullable error) {
                                              if (!success) {
                                                // there was a problem presenting the preferences
                                              } else {
                                                // next checkout will reflect the merchant's changes.
                                              }
                                            }];
}

Community

• Questions? Get in contact with our integration team by sending an email to integration@sumup.com.
• Found a bug? Open an issue. Please provide as much information as possible.

Changelog

SumUp iOS SDK Changelog

License

SumUp iOS SDK License