benstjohn - terminal payments and php client server interaction | Stripe Developers | Page 1

autumn brookBOT Oct 25, 2022, 7:35 PM

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left violet Oct 25, 2022, 7:36 PM

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I think you'd mostly track this server side and do some kind of polling on your client

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or an equivalent of a socket session from your client to server so your server can notify the client

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Does the client end up getting the stripe id, or only your internal ID?

fringe mantle Oct 25, 2022, 7:38 PM

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so I can pass pretty much anything necessary from the API to the mobile side and the PHP client side

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we have a "session" ID for each process that we use to track an individual payment process - and use that ID as a unique endpoint to poll

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so you hit /paymentSession/123/newIntent and it creates the intent

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mobile will poll /paymentSession/123/poll

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then if there IS an existing intent to fulfill it will fulfill it.

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Ideally, we just directly pass the success to the PHP client side, but it's not looking like that's possible

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So would we just need to set up our own system for polling that specific endpoint? @left violet or can we have the PHP listen directly to taht intentID

left violet Oct 25, 2022, 7:49 PM

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Right, so any of that can work, its entirely up to you based on your needs

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Yep, i'd say so

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but i'll mention again if you do have the payment intent id client side you could check its status directly from the client: https://stripe.com/docs/js/payment_intents/retrieve_payment_intent

Stripe JS Reference

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However, moderating this server-side with webhooks and structured polling is likely better

fringe mantle Oct 25, 2022, 7:50 PM

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And what would be the best reference for me on the iOS side of things to essentially retrieve that payment intent ID and then tell the M2 reader to process a payment for THAT intent?

fringe mantle Oct 25, 2022, 7:51 PM

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left violet but i'll mention again if you do have the payment intent id client side you _cou...

So we could set up a singular webhook (no ID) and then have it just process all events accordingly?

left violet Oct 25, 2022, 7:51 PM

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I think so, your server would decide where info goes from there

fringe mantle Oct 25, 2022, 7:51 PM

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gotcha

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and in regards to the iOS question?

left violet Oct 25, 2022, 7:53 PM

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If you create the payment intent on the server, you at least need to send the client_secret back to the client to work with the Terminal SDK. on the reader:

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https://stripe.com/docs/terminal/payments/collect-payment?terminal-sdk-platform=ios#create-server-side

fringe mantle Oct 25, 2022, 7:54 PM

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I thought we can't send that around?

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Should I just send the payment ID and the retrieve the client_scret on the mobile side with the intent ID?

left violet Oct 25, 2022, 7:55 PM

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Well you need to send it to the client to use for that payment

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No, that client secret is not present on the Stripe.js retrieve, due to the sensitivity

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you need to return that from your server

fringe mantle Oct 25, 2022, 7:56 PM

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okay, so there isn't any harm in passing the secret?

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what if I use the API on iOS to retrieve it with the ID?

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stripe API

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just want to make sure I'm not breaking the stripe rules and passing around the client secret. Especially if I can easily send the ID around

left violet Oct 25, 2022, 8:00 PM

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You should treat the client secret carefully, but its perfectly fine & expected to pass it to your client, that's what it's for

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benstjohn - terminal payments and php client server interaction

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