Checks if hardware is available that allows for fingerprint authentication and if a fingerprint has been enrolled.
This method returns a promise object, which can be in one of the following states:
Resolve - returns an isAvailable boolean parameter.
Reject - returns an object that is an instance of a generic Error
class, as described below.
{
"name": error_code
"message": detailed_message
}
Where error_code stands for one of the error codes described in the
Constants section of the Authentication
article and detailed_message can be an additional message from the
native side.