Signing Messages

The mobile app can utilise the following methods in the CDK to sign messages with or without user presence

• SignMessage(context: Context, message: Message)

• SignMessageWithUserPresence(context: Context, message: Message, password: String)

• SignMessageWithUserPresence(activity: androidx.fragment.app.FragmentActivity, message: Message, callback: SignCallback)

Only way to access the message signature is from the callback of these functions (either return value or parameter value in callback).

Enabling Biometrics for User Presence

This function allows the user to enable biometric authentication for signing messages with user presence.

To enable biometrics for user presence, use the function EnableBiometrics(activity: androidx.fragment.app.FragmentActivity, password: String, callback: EnableBiometricsCallback).

If the device does not support biometrics, calling EnableBiometrics() will throw an IllegalStateException.

Disabling Biometrics

This function disables biometric authentication for user presence

To disable biometrics, use the function DisableBiometrics(context: Context, password: ByteArray, callback: DisableBiometricsCallback?).

Checking Biometric Availability

This function returns a boolean value indicating whether the device supports biometric authentication.

To determine if biometrics are available on the device, use the function IsBiometryAvailable() -> Bool.

Note: Biometric availability may vary depending on the device and Android version. It's important to handle cases where biometrics are not available or supported.