stripe-ios/MIGRATING.md

Migration Guides

Migrating from versions < 6.0

6.0 moves most of the contents of STPCard into a new class, STPCardParams, which represents a request to the Stripe API. STPCard now only refers to responses from the Stripe API. Most apps should be able to simply replace all usage of STPCard with STPCardParams - you should only use STPCard if you're dealing with an API response, e.g. a card attached to an STPToken. This renaming has been done in a way that will avoid breaking changes, although using STPCards to make requests to the Stripe API will produce deprecation warnings.

Migrating from versions < 5.0

5.0 deprecates our native Stripe Checkout adapters. If you were using these, we recommend building your own credit card form instead. If you need help with this, please contact support@stripe.com.

Migrating from versions < 3.0

Before version 3.0, most token-creation methods were class methods on the Stripe class. These are now all instance methods on the STPAPIClient class. Where previously you might write

[Stripe createTokenWithCard:card publishableKey:myPublishableKey completion:completion];

you would now instead write

STPAPIClient *client = [[STPAPIClient alloc] initWithPublishableKey:myPublishableKey];
[client createTokenWithCard:card completion:completion];

This version also made several helper classes, including STPAPIConnection and STPUtils, private. You should remove any references to them from your code (most apps shouldn't have any).

Migrating from versions < 1.2

Versions of Stripe-iOS prior to 1.2 included a class called STPView, which provided a pre-built credit card form. This functionality has been moved from Stripe-iOS to PaymentKit, a separate project. If you were using STPView prior to version 1.2, migrating is simple:

1. Add PaymentKit to your project, as explained on its project page.

2. Replace any references to STPView with a PTKView instead. Similarly, any classes that implement STPViewDelegate should now instead implement the equivalent PTKViewDelegate methods. Note that unlike STPView, PTKView does not take a Stripe API key in its constructor.

3. To submit the credit card details from your PTKView instance, where you would previously call createToken on your STPView, replace that with the following code (assuming self.paymentView is your PTKView instance):

    if (![self.paymentView isValid]) {
        return;
    }
    STPCard *card = [[STPCard alloc] init];
    card.number = self.paymentView.card.number;
    card.expMonth = self.paymentView.card.expMonth;
    card.expYear = self.paymentView.card.expYear;
    card.cvc = self.paymentView.card.cvc;
    STPAPIClient *client = [[STPAPIClient alloc] initWithPublishableKey:publishableKey];
    [client createTokenWithCard:card completion:^(STPToken *token, NSError *error) {
        if (error) {
            // handle the error as you did previously
        } else {
            // submit the token to your payment backend as you did previously
        }
    }];
   

Misc. notes

Handling errors

See StripeError.h for a list of error codes that may be returned from the Stripe API.

Validating STPCards

You have a few options for handling validation of credit card data on the client, depending on what your application does. Client-side validation of credit card data is not required since our API will correctly reject invalid card information, but can be useful to validate information as soon as a user enters it, or simply to save a network request.

The simplest thing you can do is to populate an STPCard object and, before sending the request, call - (BOOL)validateCardReturningError: on the card. This validates the entire card object, but is not useful for validating card properties one at a time.

To validate STPCard properties individually, you should use the following:

• (BOOL)validateNumber:error:
• (BOOL)validateCvc:error:
• (BOOL)validateExpMonth:error:
• (BOOL)validateExpYear:error:

These methods follow the validation method convention used by key-value validation. So, you can use these methods by invoking them directly, or by calling [card validateValue:forKey:error] for a property on the STPCard object.

When using these validation methods, you will want to set the property on your card object when a property does validate before validating the next property. This allows the methods to use existing properties on the card correctly to validate a new property. For example, validating 5 for the expMonth property will return YES if no expYear is set. But if expYear is set and you try to set expMonth to 5 and the combination of expMonth and expYear is in the past, 5 will not validate. The order in which you call the validate methods does not matter for this though.