bwurtz999 | Stripe Developers | Page 1

devout hatchBOT Dec 13, 2022, 2:23 PM

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hybrid condor Dec 13, 2022, 2:29 PM

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hey there, taking a look

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Do you have a serial number available for that reader?

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That will let me look at recent logs

split wigeon Dec 13, 2022, 2:33 PM

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WSC513128034096

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Thank you!

hybrid condor Dec 13, 2022, 2:48 PM

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It appears that the reader was still busy process the payment following this request: https://dashboard.stripe.com/logs/req_lJCiaq3o6oY1kE

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split wigeon Dec 13, 2022, 2:52 PM

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OK... can you help me understand this process a little better. I'm reviewing the logs and I see that 9:09:03 it looks like a request was POSTed to process the payment intent

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And it was finished processing at 9:09:28

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But, at 9:09:20 my app attempted to cancel the collection action because of the time that has passed

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Can you tell me what was happening between 9:09:03 and 9:09:28?

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Why can't I cancel that collection action during that time?

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Had the customer already dipped/tapped their card? And Stripe was just taking a while to process the payment?

hybrid condor Dec 13, 2022, 2:56 PM

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Yes, exactly -- a card was presented at x:09:14 so it was already into processing that when you requested the cancel_action

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The customer was a bit slow to present I suppose, and you requested cancelling just a few seconds after they tapped

split wigeon Dec 13, 2022, 2:57 PM

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OK. Do I have access to the terminal logs?

hybrid condor Dec 13, 2022, 2:57 PM

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Not at this time, no

split wigeon Dec 13, 2022, 2:57 PM

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OK

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So the way my app works, for server-driven integrations, I poll for ~20 seconds after the reader is activated to process the payment intent

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I don't want it polling indefinitely, so I stop it after a certain point to cut down on requests

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If I were to check the reader as I'm attempting to cancel the action, what would tell me that it's already received card info?

hybrid condor Dec 13, 2022, 2:59 PM

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You might want to configure that with an exponential back-off

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Basically what you encountered implies that

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If it hadnt, you'd have been able to cancel

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You are subscribed to the events for this and got the success events at x:09:30 & :31
Such as evt_1MEZAlFW9LyxBBXmSpNrH4hN for reader action succeeded

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and evt_3MEYzpFW9LyxBBXm2HvvyKMZ for payment intent succeeded

split wigeon Dec 13, 2022, 3:02 PM

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Yes, and I received the webhook

split wigeon Dec 13, 2022, 3:02 PM

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hybrid condor If it hadnt, you'd have been able to cancel

OK so catching this error means that the card has already been presented. Got it

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Is there a way for me to intentionally slow down the processing in test mode so that I can simulate this?

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It testing it never takes 14 seconds for a payment to process

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It's always much faster

hybrid condor Dec 13, 2022, 3:05 PM

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Hmm not easily i don't think, without some complex network packet manipulation to delay

split wigeon Dec 13, 2022, 3:08 PM

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Could this have potentially taken so long because the card required additional authentication to complete the purchase? And is it possible to trigger additional authentication with something similar to these errors (https://stripe.com/docs/terminal/references/testing#physical-test-cards) ?

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Or do I have to use a simulated test card to invoke additional authentication?

hybrid condor Dec 13, 2022, 3:11 PM

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Hmm I'm not familiar with any such flow, but i suppose its conceivable for a bank/card to build this

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But no we don't have any test card with a flow like that

split wigeon Dec 13, 2022, 3:13 PM

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Something to simulate a debit card needing a PIN? Anything?

hybrid condor Dec 13, 2022, 3:19 PM

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The simulated cards have examples for prompting for PIN: https://stripe.com/docs/terminal/references/testing#test-cards-for-specific-success-cases

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So you can potentially work out this path using the simulated reader and those cards

split wigeon Dec 13, 2022, 3:22 PM

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OK thank you

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You've been very helpful!

hybrid condor Dec 13, 2022, 3:32 PM

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Quite welcome 🙂 thanks for your patience

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