Whether you’re showing a checkout page in Safari or using the In-App Browser, the Superwall SDK relies on deep links to redirect back to your app.

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Prerequisites

  1. Configuring Stripe Keys and Settings
  2. Deep Links

Here, we’ll focus on how to handle the user experience when the user has been redirected back to your app after a web purchase, using SuperwallDelegate methods.

If you’re not using Superwall to handle purchases, then you’ll need to follow extra steps to redeem the web purchase in your app.

When your app opens via the deep link, we will call the delegate method willRedeemLink() before making a network call to redeem the code. At this point, you might wish to display a loading indicator in your app so the user knows that the purchase is being redeemed.

func willRedeemLink() {
  ToastView.show(message: "Activating...", showActivityIndicator: true)
}

To present your own loading UI on top of the paywall, you can access the view controller of the paywall via Superwall.shared.presentedViewController. You can manually dismiss the paywall here, but note that the completion block of the original register call won’t be triggered. The paywall will be dismissed automatically when the didRedeemLink method is called.

After receiving a response from the network, we will call didRedeemLink(result:) with the result of redeeming the code. This is an enum that has the following cases:

  • success(code: String, redemptionInfo: RedemptionInfo): The redemption succeeded and redemptionInfo contains information about the redeemed code.
  • error(code: String, error: ErrorInfo): An error occurred while redeeming. You can check the error message via the error parameter.
  • expiredCode(code: String, expired: ExpiredCodeInfo): The code expired and ExpiredCodeInfo contains information about whether a redemption email has been resent and an optional obfuscated email address that the redemption email was sent to.
  • invalidCode(code: String): The code that was redeemed was invalid.
  • expiredSubscription(code: String, redemptionInfo: RedemptionInfo): The subscription that the code redeemed has expired.

On network failure, the SDK will retry up to 6 times before returning an error RedemptionResult in didRedeemLink(result:).

Here, you should remove any loading UI you added in willRedeemLink and show a message to the user based on the result. If a paywall is presented, it will be dismissed automatically.

func didRedeemLink(result: RedemptionResult) {
  switch result {
    case .expiredCode(let code, let expiredInfo):
      ToastView.show(message: "Expired Link", systemImageName: "exclamationmark.square.fill")
      print("[!] code expired", code, expiredInfo)
      break
    case .error(let code, let error):
      ToastView.show(message: error.message, systemImageName: "exclamationmark.square.fill")
      print("[!] error", code, error)
      break
    case .expiredSubscription(let code, let redemptionInfo):
      ToastView.show(message: "Expired Subscription", systemImageName: "exclamationmark.square.fill")
      print("[!] expired subscription", code, redemptionInfo)
      break
    case .invalidCode(let code):
      ToastView.show(message: "Invalid Link", systemImageName: "exclamationmark.square.fill")
      print("[!] invalid code", code)
      break
    case .success(_, let redemptionInfo):
      if let email = redemptionInfo.purchaserInfo.email {
        Superwall.shared.setUserAttributes(["email": email])
        ToastView.show(message: email, systemImageName: "person.circle.fill")
      } 
      else {
        ToastView.show(message: "Welcome!", systemImageName: "person.circle.fill")
      }
      break
  }
}