Release Mode Issue

[fortknox]

Good day,
I’m currently having an error testing the implementation of the PayStack Flutter SDK on my mobile app.
It appears to work on the Emulator on Debug Mode but when on a Physical Device on Release Mode, while testing on TestFlight, I get the following error :
NoSuchMethodError: The getter 'length' was called on null.
Receiver: null
Tried Calling: length

TRY ANOTHER CARD
START OVER WITH SAME CARD

[DEVSOG12]

How you trying to charge the card

[fortknox]

How you trying to charge the card

Yes I was.

[DEVSOG12]

Are you using the server implementation or the local implementation

…

On Tue, 12 Jan 2021 at 13:25, Adewale Soetan ***@***.***> wrote: How you trying to charge the card Yes I was. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#85 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ANAEHQXL4AGENTI6URPYFFTSZQ5VJANCNFSM4V3YWDAQ> .

[fortknox]

Are you using the server implementation or the local implementation
…

Not sure, can you please expatiate....

[DEVSOG12]

For firstly the error you got may be due to the fact a variable was unassigned or is null. For me my implementation of the plug-in on iOS works fine, doesn't seem to have any issue on both the emulator the physical device. A really doubt that it could go wrong on test flight. I would have checked it out but my membership expired and I'm yet to pay this year.

Where exactly did you get this error!

[fortknox]

For firstly the error you got may be due to the fact a variable was unassigned or is null. For me my implementation of the plug-in on iOS works fine, doesn't seem to have any issue on both the emulator the physical device. A really doubt that it could go wrong on test flight. I would have checked it out but my membership expired and I'm yet to pay this year.

Where exactly did you get this error!

The variable is assigned as it works well on the emulator from cradle to grave i.e payment successful and feedback token received etc.
while deployed on the physical device, the error pops up after entering the card details.... probably something breaks up during compilation. I will want you to shed more light on the server/local implementation.

[DEVSOG12]

You could check This Repo For An Example. For the Local Implementation, you don't need to make calls the backend and the logic of the transaction is handled on the frontend. For the server implementation there can help a http post to your backend sending {email, name, meta_data , reference}, then your backend will send back an. access code, this code will now enable the transaction to be processed. The the transaction can also be verified with the reference passed.
I think the backend implementation works better, if you are building a full stack app. But If you going server less then the UI Implementation should be okay :).

Have you tried running flutter run --release -d <device_id> other than using TestFlight. And also the OTP pin entered dust be 6 characters entering more than this may throw an error

[DEVSOG12]

My Implementation on both iOS and Android Works fine in release!

[fortknox]

My Implementation on both iOS and Android Works fine in release!

Thanks a lot. I finally found the problem, the variable was referencing a wrong key. It’s working now. Thanks a lot for all the help.