Observing The Payment Process

Observing The Payment Process

Your application can observe the state of the payment and react accordingly. At a minimum, your application must remove the SDK UI from view when the payment is finished.

Android

On Android, observe the state or richState of PaymentViewModel. The PaymentViewModel of a PaymentFragment is stored in its parent Activity. If you really need to have multiple PaymentFragments in a single Activity, you need to assign each a different key for their PaymentViewModels (use PaymentFragment.ArgumentsBuilder.viewModelProviderKey).

Android

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val paymentViewModel = ViewModelProvider(activity)[PaymentViewModel::class.java]
// or use the activity.paymentViewModel convenience property

paymentViewModel.richState.observe(owner) { richState ->
    // handle new state here
}

The process state is available at richState.state, which has the following cases:

• PaymentViewModel.State.IDLE: Not active
• PaymentViewModel.State.IN_PROGRESS: Active; waiting for either network response or user interaction
• PaymentViewModel.State.UPDATING_PAYMENT_ORDER: Updating the payment order (because you called updatePaymentOrder)
• PaymentViewModel.State.COMPLETE: Complete; you should hide the PaymentFragment and check the payment status from your application servers
• PaymentViewModel.State.cancelled: cancelled by the user; you should hide the PaymentFragment.
• PaymentViewModel.State.RETRYABLE_ERROR: Payment could not proceed, but the error is not fatal. See below for options here.
• PaymentViewModel.State.FAILURE: Payment has failed. You should hide the PaymentFragment.

In the retryable error and failure states, the error that caused the failure is available at richState.exception. The exception is of any type thrown by your Configuration. If the failure state was instead reached because Swedbank Pay reported a Terminal Failure, that will be available at richState.terminalFailure.

When the PaymentFragment is showing the payment menu of the payment order, the corresponding ViewPaymentOrderInfo is available at richState.viewPaymentOrderInfo. This is the value that your Configuration returned to the SDK; if you are using Instrument Mode with the Merchant Backend Configuration, you may be interested in the instrument and availableInstruments fields to determine whether to show your instrument selection UI.

Retryable Errors

In the retryable error state, the PaymentFragment will, by default, show an error message with instructions to retry. You may disable this by setting the desired default UI flags (PaymentFragment.ArgumentsBuilder.setEnabledDefaultUI). If you do wish to provide your own UI for this state, you can call paymentViewModel.retryPreviousAction() to insruct the PaymentFragment to retry. A message describing the problem is available at richState.retryableErrorMessage.

Overriding Terms Of Service Link

By default, when the user taps on the Terms of Service link in the Payment Menu, a new Activity will be started, which will display the linked web page. However, you may wish to provide a native Terms of Service UI instead. To do this, set a listener for the event by calling paymentViewModel.setOnTermsOfServiceClickListener.

Android

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paymentViewModel.setOnTermsOfServiceClickListener(lifecycleOwner) { paymentFragment, url ->
    // show ToS UI
    // return true to disable the default behavior
    // (alternatively, return false to continue with the default behavior)
}

iOS

On iOS, set a delegate to the SwedbankPaySDKController. The delegate methods will be called on state changes.

iOS

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swedbankPaySDKController.delegate = self

// ...

extension MyClass : SwedbankPaySDKDelegate {
    func paymentOrderDidShow(info: SwedbankPaySDK.ViewPaymentOrderInfo) {
        // A payment order is now shown;
        // info is the ViewPaymentOrderInfo value from your Configuration
    }

    func paymentOrderDidHide() {
        // No payment order is now shown
    }
    func updatePaymentOrderFailed(
        updateInfo: Any,
        error: Error
    ) {
        // An update failed; error is the error from your Configuration
    }

    func paymentComplete() {
        // Payment is complete; you should hide the SwedbankPaySDKController
    }
    func paymentcancelled() {
        // Payment cancelled by user; you should hide the SwedbankPaySDKController
    }

    func paymentFailed(error: Error) {
        // Payment failed. The error is either from your Configuration,
        // or a SwedbankPaySDKController.WebContentError
    }

    func overrideTermsOfServiceTapped(url: URL) -> Bool {
        // Show custom Terms of Service UI, if needed.
        // Return true to disable the default behavior,
        // false to allow SwedbankPaySDKController to show
        // the default ToS UI.
    }
}

Any errors are ones thrown by your Configuration, or, in the case of paymentFailed, SwedbankPaySDKController.WebContentError. SwedbankPaySDKController.WebContentError has two cases:

• .ScriptLoadingFailure(scriptUrl: URL?): The script failed to load. No error message is available; this is a limitation of WKWebView
• .ScriptError(SwedbankPaySDK.TerminalFailure?): The script made an onError callback. The payload is the Terminal Failure reported by Swedbank Pay.

When using the Merchant Backend Configuration, other errors will be of the type SwedbankPaySDK.MerchantBackendError.