TootLips | Stripe Developers | Page 1

tawny skiffBOT Apr 20, 2023, 8:38 PM

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untold yacht Apr 20, 2023, 8:40 PM

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Interesting, are you trying to manually trigger the 3DS flow?
Is there a guide you're following for this?

stray warren Apr 20, 2023, 8:42 PM

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We get this error when using a 3ds2 test card from https://stripe.com/docs/testing 4000 0000 0000 3220

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our backend gives us a client secret that the app feeds into the following function https://stripe.dev/stripe-ios/stripepayments/documentation/stripepayments/stppaymenthandler/handlenextaction(forpayment:with:returnurl:completion:)

tawny skiffBOT Apr 20, 2023, 8:44 PM

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stray warren Apr 20, 2023, 8:45 PM

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the first attempt at using the client secret works correctly and the 3ds webview is shown.

However, if a user terminates the mobile app while viewing the 3ds auth web view, the app will attempt to use the same same clientSecret to show the 3ds promp again. Using the same clientSecret a second time, gives us the error stating that JSON payload could not be parsed

normal atlas Apr 20, 2023, 8:46 PM

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Stepping in and catching up

untold yacht Apr 20, 2023, 8:50 PM

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Can you share the code that calls handleNextAction ?

stray warren Apr 20, 2023, 8:52 PM

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self.stripePaymentHandler.handleNextAction(forPayment: secret, with: context, returnURL: nil)
secret is the clientSecret and context is an objcet that adheres to STPAuthenticationContext

untold yacht Apr 20, 2023, 8:54 PM

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Gotcha. We don't typically see folks using the function directly as PaymentSheet & flowcontroller flow supports 3DS natively.

Is this something that used to work before but broke recently?

stray warren Apr 20, 2023, 8:55 PM

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no, this has been broken for some time now, but addressing payment errors has become a priority recently for us

untold yacht Apr 20, 2023, 8:58 PM

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Can you try calling the confirmPayment method instead of using handleNextAction directly?
~~https://stripe.dev/stripe-ios/stripe-payments/Classes/STPPaymentHandler.html#/c:@M@StripePayments@objc(cs)STPPaymentHandler(im)confirmPayment:withAuthenticationContext:completion:~~

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Ah that link seems to be broken

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here
https://stripe.dev/stripe-ios/stripepayments/documentation/stripepayments/stppaymenthandler/confirmpayment(_:with:completion:)

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We have an example here if that helps
https://stripe.com/docs/payments/accept-a-payment?platform=ios&ui=custom#ios-submit-payment

stray warren Apr 20, 2023, 9:03 PM

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same error with the new function

untold yacht Apr 20, 2023, 9:03 PM

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Interesting..

stray warren Apr 20, 2023, 9:06 PM

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so, when using a brand new clientSecret https://api.stripe.com/v1/3ds2/authenticate returns

  "id": "threeds2_1Mz4ejJjI7oqAmtifF9rzbAP",
  "object": "three_d_secure_2",
  "ares": null,
  "created": 1682024681,
  "creq": null,
  "error": null,
  "fallback_redirect_url": "https://hooks.stripe.com/3d_secure_2/hosted/payatt_3Mz4eeJjI7oqAmti1OkSMOnV?merchant=acct_1FbucmJjI7oqAmti&payment_intent=pi_3Mz4eeJjI7oqAmti1iMsqYUe&payment_intent_client_secret=pi_3Mz4eeJjI7oqAmti1iMsqYUe_secret_Vg8eDlZ3kzoe2YxuLHHlTB7aI&publishable_key=pk_test_2Zxs26AlTZezW9XlnyvmAsAY00NpoSuGI9&source=payatt_3Mz4eeJjI7oqAmti1OkSMOnV",
  "livemode": false,
  "source": "payatt_3Mz4eeJjI7oqAmti1OkSMOnV",
  "state": null
}```
This json is valid, and the 3ds prompt is shown

untold yacht Apr 20, 2023, 9:06 PM

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How exactly are you attempting to use the same clientSecret?
Are you retrieving it again OR have you stored it locally?

stray warren Apr 20, 2023, 9:06 PM

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We get the clientSecret from our backend which has webhooks to wait for a response for 3ds.

untold yacht Apr 20, 2023, 9:06 PM

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yeah, quitting the app fails the 3DS challenge so a new challenge is required.

stray warren Apr 20, 2023, 9:07 PM

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this same flow works for 3ds1 cards

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but not 3ds2

untold yacht Apr 20, 2023, 9:08 PM

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I wonder if your app is trying to use the old challenge instead.

Could you try retrieving the PaymentIntent again before you re-attempt?
https://stripe.dev/stripe-ios/stripepayments/documentation/stripepayments/stpapiclient/retrievepaymentintent(withclientsecret:completion:)

stray warren Apr 20, 2023, 9:11 PM

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ok, give me a second

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retrievePaymentIntent(withClientSecret returns the same clientSecret

untold yacht Apr 20, 2023, 9:16 PM

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Right but I am curious to see if it presents a new challenge instead

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If that doesn't work, a quick fix would be to cancel the previous PaymentIntent and create a new one when your user relaunches the app

stray warren Apr 20, 2023, 9:22 PM

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i get same error after getting the payment intent again

untold yacht Apr 20, 2023, 9:23 PM

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Ah that's a bummer

stray warren Apr 20, 2023, 9:24 PM

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is this potentially a stripe iOS SDK bug? not being able to parse json seems like an unexpected scenario

untold yacht Apr 20, 2023, 9:28 PM

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Could be. We'll need to reproduce this behavior on our end to make sure we havent' missed anything.

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Would you mind writing into our support team via
https://support.stripe.com/?contact=true

Providing as much details as you can about your integration such as SDK version, sample code etc.
If you can share a minimal sample app that can help us reproduce this on our end, that'd be awesome too.

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Make sure to mention you spoke with Hanzo on discord

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Let us know once you write in so that our team can pull the ticket

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In the meantime, following should definitely work as an alternative

If that doesn't work, a quick fix would be to cancel the previous PaymentIntent and create a new one when your user relaunches the app

stray warren Apr 20, 2023, 9:40 PM

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ok, thanks for the help

#TootLips