/**
* Create a new Authenticator based on a given restore code
* provided by another device and its serial.
* @param string $serial The serial, same format as serial().
* @param string $restore_code 10 characters restore code
* @return Authenticator the requested Authenticator
*/
public static function restore($serial, $restore_code)
{
$authenticator = new Authenticator($serial, 'tempsecret');
$authenticator->do_restore($restore_code);
return $authenticator;
}
