Can we have proper error codes in failure scenarios instead of the error strings

[vinaykaitha]

Like in this case:

    @Override
    public void onAuthenticationError(int errorCode, @NonNull CharSequence errString) {
        super.onAuthenticationError(errorCode, errString);
        if (errorCode == BiometricPrompt.ERROR_NEGATIVE_BUTTON || errorCode == BiometricPrompt.ERROR_USER_CANCELED ) {
            WritableMap resultMap = new WritableNativeMap();
            resultMap.putBoolean("success", false);
            resultMap.putString("error", "User cancellation");
            this.promise.resolve(resultMap);
        } else {
            this.promise.reject(errString.toString(), errString.toString());
        }
    }

this.promise.reject(errorCode.toString(), errString.toString()); and

WritableMap resultMap = new WritableNativeMap();
resultMap.putBoolean("success", false);
resultMap.putString("errorCode", errorCode.toString());
this.promise.resolve(resultMap);

would have been more helpful.

So that we can show specific message to the user, like "You haven't enrolled for biometric on this device" etc.. Same goes for iOS.

[UraFIZ]

This is a great idea to organize error messages in this project.

[jayfunk]

Gladly would accept a PR.