[IPP] Transactions below minimal amount error message missing

[samiuelson]

Problem

• In case of payment amount below minimal allowed amount (e.g. $0.20) payment fails but we don't get a dedicated error message. Instead we show generic "Sorry, this payment couldn't be processed"

Goal - investigate if this is a backend or app issue.

• In case of payment amount below minimal allowed amount (e.g. $0.20) payment fails the first time. However, it succeeds during the second attempt.

Goal - investigate if this is correct

Context

The issue was discovered when testing failed payment state in POS: #13057 (comment)

[dangermattic]

🚫 Please add a type label (e.g. type: enhancement) and a feature label (e.g. feature: stats) to this issue.

[kidinov]

So far, my findings:

• For some reason, the error now comes from the "capture" state while we map our errors in the processing step. So we expect this error on the step before it comes actually
• Currently the error comes from our backend (not the SDK), and it doesn't contain any proper way of determining the type of it. Only a message

{"error":"wcpay_capture_error","message":"Payment capture failed to complete with the following message: Minimum required amount was not reached."}

• On iOS, it looks like the SDK returns properly typed errors, including this one. But I still don't understand why it works there

[kidinov]

I tried to install 17.3-rc-1 from FEB 2024 - the same issue is there

The same on 15.7 and 12.4

But, on iOS, the error comes before the card is applied, so it looks like it's a processing step in their case

[kidinov]

Ok, so on iOS it works just because they use hardcoded value on the client. So, the change probably comes from Stripe. I asked them

p1735228071598689-slack-C01G168NFC2

[kidinov]

pdfdoF-67u-p2 results of the research