React, Error: "systemCancel", when biometric authentication in the app start up about capacitor-biometric-auth

[aparajita]

I need more details.

• What kind of error?
• What is the error message?
• Can you inspect the app with Chrome and get a stack trace?

[aparajita]

Did you call checkBiometry() BEFORE calling authenticate()?

[francisdurairaj]

I use the given code in login tsx file.

const checkAuthCallback = useCallback(async () => {
try {
const result = await BiometricAuth.checkBiometry();
if(result.biometryType == BiometryType.fingerprintAuthentication) {

     await BiometricAuth.authenticate({
        reason: 'Authenticate',
        cancelTitle: 'Cancel',
        iosFallbackTitle: 'Touch ID for Login',
        androidTitle: 'Touch ID for Login',
        allowDeviceCredential: true,
        androidConfirmationRequired: false,
        andriodBiometryStrength: AndriodBiometryStrength,weak
     });
     handleRirect();
  }

}
catch(error){
toast.error((error instanceof BiometryError) ? (${error.code}): ${error.message} : String(error));
}
},[handleRirect]);

useEffect(() => {
const doAuth = async () => {
await checkAuthCallback();
}
doAuth();
}, [checkAuthCallback]);

[aparajita]

As the docs point out, result.biometryType == BiometryType.fingerprintAuthentication does not mean biometry is actually available. You need to check result.isAvailable.

• What is the value of result.isAvailable?
• Does the fingerprint authentication dialog come up at all?

I haven't tested on Android 14 yet, I will try tomorrow.

[francisdurairaj]

Yes we are getting the authentication. But after successful authentication getting systemcancel error. And again I have to click on button to check biometric. It works on the second time

First time I am getting error when triggered via button click it works.

[aparajita]

Is the code above copied and pasted from your app? Because there is a bug:

andriodBiometryStrength: AndriodBiometryStrength,weak

There is a comma between AndroidBiometryStrength and weak. It should be a dot. I found a potential bug in my code if that value is not valid, which I will fix.

I tested on an Android 14 emulator and it works fine, so that isn't the issue.

Also, I think you have misunderstood the purpose of iosFallbackTitle:

iosFallbackTitle: 'Touch ID for Login'

I recommend reading the docs for this property to understand its purpose.

[aparajita]

v7.1.1 has just been released with the Android bug fix.

[francisdurairaj]

I think it's rendering multiple times.. which causes the lib to throw 'systemcancel'.

[aparajita]

I think it's rendering multiple times.. which causes the lib to throw 'systemcancel'.

I don't think that behavior is coming from my code, I have never seen that happen.