Preferred network for co-branded cards not working on android

[undeadborn]

Describe the bug

Looks like co-branded cards are not working as expected on android.

If user selects any of the brands available in the dropdown, the response for preferredNetwork is always null.

If we force a default option programmatically through the preferredNetworks property, the result is the same.

The response is always null regardless of what we do.

I tested the functionality on iOS and it works fine there.

To Reproduce

This can be reproduced using the example folder from the project.

Steps to reproduce the behavior:

1. Configure a CardField with preferredNetworks={[CardBrand.CartesBancaires, CardBrand.Visa]}
2. Enter co-branded visa test card 4000002500001001
3. Press Pay button
4. Check server response which will contain "preferredNetwork": null

Expected behavior

The preferred network manually selected or the default provided through preferredNetworks property must be used

Screenshots

screenshot from emulator

screenshot from test server logs

Smartphone:

• Device: Pixel 4 (emulator)
• OS: Android 12.0 (S) - API 31

Additional context

• @stripe/stripe-react-native = 0.38.4

[ja-mike-a]

I've the same issue in the Android SDK: https://github.com/stripe/stripe-android/issues/9210

[ipinto]

Same problem here! This bug was fixed on stripe-android a month ago. Please, could you take the fix to this repo to comply with the EU regulation? Thanks!