[Evergreen-general] Stripe Duplicate Charges

[Terran McCanna]

I read about that a while back, but I was under the impression that it
would only solve double-click types of problems, not problems where the
patron is actually filling out the form again. Is it just that we'd need to
design the idempotency key in a way that it generated the same key if the
scenario was the same? Like a combination of the patron ID and the amount
and the date or something like that?

On Wed, Mar 13, 2024 at 3:16 PM Morgan, Michele <mmorgan at noblenet.org>
wrote:

> I wanted to share some information from Stripe's support about the
> duplicate credit card charges issue we have seen since our upgrade to 3.10.
>
> Stripe support indicated that making the requests from Evergreen
> idempotent will prevent retried requests from creating duplicate charges.
> This would entail including an idempotency key as an element in the payment
> request sent to Stripe. Here is some documentation from Stripe:
>
> https://docs.stripe.com/api/idempotent_requests
>
> I will likely open a Launchpad bug about this, but have not heard that
> others have seen this issue. I would still be interested in hearing if,
> besides PINES, there are other systems running Evergreen 3.8 or later and
> using Stripe, and whether or not you have seen any issues.
>
> Thanks for any feedback,
> Michele
>
> --
> Michele M. Morgan, Systems Support Specialist
> North of Boston Library Exchange, Danvers Massachusetts
> mmorgan at noblenet.org
>
>
>
> On Wed, Feb 28, 2024 at 9:42 AM Morgan, Michele <mmorgan at noblenet.org>
> wrote:
>
>> Thanks Terran!
>>
>> We've seen that negative bill issue once since our upgrade, and we're
>> double checking that our tt2 files have the correct code.
>>
>> We have also seen issues where the payment looks fine on the Evergreen
>> side, but on the Stripe side we see that more than one successful charge
>> was made for the same Evergreen bill. These patrons have *not* had any
>> negative bills.
>>
>> Has anyone else seen similar behavior?
>>
>> Thanks,
>> Michele
>>
>> --
>> Michele M. Morgan, Systems Support Specialist
>> North of Boston Library Exchange, Danvers Massachusetts
>> mmorgan at noblenet.org
>>
>>
>>
>> On Tue, Feb 27, 2024 at 5:09 PM Terran McCanna <
>> tmccanna at georgialibraries.org> wrote:
>>
>>> We still see it sometimes when a patron has a negative bill on their
>>> account (even when the overall balance isn't negative).
>>> The current code shouldn't even be showing the payment option if there
>>> are any negative bills, but somehow some patrons are still getting the
>>> option. We have been on the new code for a long time (more than 2 years?)
>>> so the only thing we can think of is that those patrons must be using an
>>> old device that is stubbornly hanging onto a locally cached version of the
>>> page. But we haven't been able to recreate the problem, so it's really
>>> frustrating to troubleshoot.
>>>
>>> As far as I can tell, what is happening is that the patron somehow loads
>>> the old version of the page that didn't do the negative bill check, pays,
>>> Stripe accepts the payment but it's the wrong amount, so when Stripe sends
>>> it to Evergreen it fails. Then the patron sees that Evergreen didn't accept
>>> it and they pay again (still the wrong amount), causing their credit card
>>> to be charged again.
>>>
>>>
>>>
>>>
>>> On Tue, Feb 27, 2024 at 4:59 PM Morgan, Michele via Evergreen-general <
>>> evergreen-general at list.evergreen-ils.org> wrote:
>>>
>>>> Hi Everyone,
>>>>
>>>> Since moving to Stripe Payment Intents with our upgrade in early
>>>> January, we've seen issues with duplicate charges to the patron for the
>>>> same billing in Evergreen.
>>>>
>>>> I've searched Launchpad, but haven't found a relevant bug.
>>>>
>>>> Have others experienced similar issues since moving to Payment Intents?
>>>>
>>>> For reference, bug 1894005
>>>> <https://bugs.launchpad.net/evergreen/+bug/1894005> *Wishlist: Add
>>>> support for Stripe Payment Intents* was released in Evergreen 3.8.
>>>>
>>>> Also, for reference, these two followup bugfixes:
>>>>
>>>> bug 1965579 <https://bugs.launchpad.net/evergreen/+bug/1965579> - Stripe
>>>> Payment Intents and Negative Bills
>>>> bug 1981628 <https://bugs.launchpad.net/evergreen/+bug/1981628> - Follow
>>>> up to Stripe payment intents bug
>>>>
>>>> Thanks for any insight!
>>>>
>>>> Michele
>>>>
>>>> --
>>>> Michele M. Morgan, Systems Support Specialist
>>>> North of Boston Library Exchange, Danvers Massachusetts
>>>> mmorgan at noblenet.org
>>>>
>>>> _______________________________________________
>>>> Evergreen-general mailing list
>>>> Evergreen-general at list.evergreen-ils.org
>>>> http://list.evergreen-ils.org/cgi-bin/mailman/listinfo/evergreen-general
>>>>
>>>
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