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OtherFeatures.md

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Other features

Handle 3D Secure

When you send a 3D secure charge request from your server you will get back a 3D Secure URL. This is available from _links.redirect.href within the JSON response. You can then pass the 3D Secure URL to a ThreedsWebViewController in order to handle the verification.

The redirection URLs (success_url and failure_url) are set in the Checkout.com Hub, but they can be overwritten in the charge request sent from your server. It is important to provide the correct URLs to ensure a successful payment flow.

Lets imagine we are now working inside YourViewController.swift and we are handling the 3DS challenge:

// Ensure you know the fail & success URLs
private enum Constants {
    static let successURL = URL(string: "http://example.com/success")!
    static let failureURL = URL(string: "http://example.com/failure")
}

// Prepare the service
let checkoutAPIService = CheckoutAPIService(publicKey: "<Your Public Key>", environment: .sandbox)

// Create the ThreedsWebViewController
let threeDSWebViewController = ThreedsWebViewController(
    checkoutAPIService: checkoutAPIService,
    // If the payment response provided new success_url or failure_url, use those. Otherwise default to Checkout provided values as documented previously
    successUrl: serverOverridenSuccessURL ?? Constants.successURL,
    failUrl: serverOverridenFailureURL ?? Constants.failureURL)
threeDSWebViewController.delegate = self
threeDSWebViewController.authURL = challengeURL // This is coming from the payment response

// Present threeDSWebViewController
present(threeDSWebViewController, animated: true, completion: nil)

Previously we have added the line threeDSWebViewController.delegate = self. This will raise compiler error as we now need to have YourViewController conform to the required protocol. Doing this, we are able to find the outcome of the challenge and react accordingly

extension YourViewController: ThreedsWebViewControllerDelegate {
    func threeDSWebViewControllerAuthenticationDidSucceed(_ threeDSWebViewController: ThreedsWebViewController, token: String?) {
        
        // Congratulations, the Challenge was successful !

        threeDSWebViewController.dismiss(animated: true, completion: nil)
    }

    func threeDSWebViewControllerAuthenticationDidFail(_ threeDSWebViewController: ThreedsWebViewController) {
        
        // Oooops, the payment failed !
        
        threeDSWebViewController.dismiss(animated: true, completion: nil)
    }
}

Using Apple Pay

We are able to handle PKPayment token data from Apple Pay, which translates an Apple Pay token into a Checkout.com token for you to pay with from your backend.

// Prepare the service
let checkoutAPIService = CheckoutAPIService(publicKey: "<Your Public Key>", environment: .sandbox)

func handle(payment: PKPayment) {
    // Get the data containing the encrypted payment information.
    let paymentData = payment.token.paymentData

    // Request an Apple Pay token.
    checkoutAPIService.createToken(.applePay(ApplePay(paymentData))) { result in
        switch result {
        case .success(let tokenDetails):
            // Congratulations, payment token is available
        case .failure(let error):
            // Ooooops, an error ocurred. Check `error.localizedDescription` for hint to what went wrong
        }
    }
}

Phone number validation

Billing address phone number validation will use the device local to set the prefix of the phone number. For example, a UK number will be automatically prefixed with +44.

If users want to enter a phone number that differs from their device local (i.e. a US number when their device local is set up for the UK), they should first provide the country code (e.g. +1) when entering the phone number.