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Administrator& Client
A NFC smartphone with Key Butler installed, or a contactless
card, is called a User. For a User to unlock a lock, it must
become a Valid User of the lock. Only Valid Users can unlock
the lock.
There are two kinds of Valid Users. The first one is
Administrator.
A lock has only one Administrator at a time. Besides unlock, the
Administrator is also responsible for managing the lock and all
the Clients. Only smartphones can be used as Administrators.
The second kind of Valid Users is Client. A lock can have
multiple Clients. A Client can unlock the lock. Both
smartphones and contactless cards can be used as Clients.
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