state
Returns the state of the contacts restore process.
May not be launched if Competition status is not GRANTED
RestoreState.Failed may contain the following exceptions:
Throws
when session is not active
when no contacts permission
when device in roaming
when no internet connection
CompetitionDeniedException
when competition state is not Granted
user with exceeded quota cannot create first book.
when 401 http error.
403 http error.
the some request has wrong parameters.
other.