echeyde-terminal-wisepos | Stripe Developers | Page 1

languid sparrow Jun 6, 2022, 11:16 PM

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Hey @tired lily can you clarify what you mean by IP address frequently changing? Like they reboot the device?

tired lily Jun 6, 2022, 11:25 PM

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sure, like the wisepos e address is changed by the LAN dhcp system.

languid sparrow Jun 6, 2022, 11:27 PM

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but does it happen as the device is live and connected?

tired lily Jun 6, 2022, 11:28 PM

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yes

languid sparrow Jun 6, 2022, 11:28 PM

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Have you read https://support.stripe.com/questions/the-stripe-terminal-sdk-is-encountering-dns-errors-when-connecting-to-an-internet-reader

tired lily Jun 6, 2022, 11:29 PM

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yes I did.

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which leads to understanding how is the dns record updated and what is the TTL ?

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since the card reader hostname is tied to the ip address

languid sparrow Jun 6, 2022, 11:30 PM

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gotcha

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I'm asking a colleague I don't know much about that part, I'll update you once I find out more

tired lily Jun 6, 2022, 11:31 PM

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great, thanks!

languid sparrow Jun 6, 2022, 11:50 PM

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Okay I confirmed with some engineers that this is something we don't handle well today. You would detect the connection error and basically you'd have to disconnect/reconnect in that case.

tired lily Jun 6, 2022, 11:50 PM

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ok , so reconnect is the flow that creates the DNS record ?

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also can you lmk what is the TTL for that dns record? thanks

languid sparrow Jun 7, 2022, 12:02 AM

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I worry you're overindexing on the DNS when it's more that we don't really support the device changing IP address in the middle of being "up"

tired lily Jun 7, 2022, 12:03 AM

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i just need to know which flow will cause the new dns entry, it is reconnect?

languid sparrow Jun 7, 2022, 12:06 AM

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But again you are focusing on a DNS entry that is irrelevant

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the problem is that the app is stuck with the old IP and never looks for a new one at that point

tired lily Jun 7, 2022, 12:07 AM

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ok, so how to get the app unstuck? re-pair wisepos e?

languid sparrow Jun 7, 2022, 12:08 AM

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no, you disconnect and reconnect your app (which is unrelated to the DNS entry being flushed, there's just a new entry for the new IP at that point already, and the app doesn't know about it because it stored the old hostname)

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disconnecting/reconnecting doesn't change the DNS entry, but it forces the app to get the correct hostname back

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You could also switch to our server-driven integration otherwise: https://stripe.com/docs/terminal/payments/setup-integration?terminal-sdk-platform=server-driven

tired lily Jun 7, 2022, 12:09 AM

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is correct hostname returned by connect then?

languid sparrow Jun 7, 2022, 12:14 AM

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it's when you discover readers I think

tired lily Jun 7, 2022, 12:16 AM

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ok, and stored on local iOS storage... note a reconnect/disconnect does not seem to work to solve an IP address change...

languid sparrow Jun 7, 2022, 12:22 AM

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you need to re-discover readers too. Have you tried that?

tired lily Jun 7, 2022, 12:23 AM

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yes, same. Does the sdk has a flush() function to remove any locally stored artifacts, like hostname ?

languid sparrow Jun 7, 2022, 12:24 AM

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looking

tired lily Jun 7, 2022, 12:27 AM

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👍 thanks , love your sharp support here!

languid sparrow Jun 7, 2022, 12:30 AM

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what exact SDK are you using and what exact version

tired lily Jun 7, 2022, 12:32 AM

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it's an iOS one , and recent, let me track my dev to know exact

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version 2.0

languid sparrow Jun 7, 2022, 12:37 AM

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exact version would help. Unfortunately no one is around to answer the specifics. I'd recommend contacting our support team https://support.stripe.com/contact and providing detailed examples where this happened and we can look at our own logs to try and narrow it down

tired lily Jun 7, 2022, 12:39 AM

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will do , much thanks for the help.

#echeyde-terminal-wisepos