NewNoOPSession creates a new NoOP client session ready to be used for making proposals.

NewSession returns a new client session not registered yet.

NoOPSeriesID is a special series ID used to indicate that the client session is a NOOP client session.

NotSessionManagedClientID is a special client id used to indicate that the entry is not managed by a client session.

SeriesIDFirstProposal is the first series id to be used for making proposals.

SeriesIDForRegister is the special series id used for registering a new client session.

SeriesIDForUnregister is the special series id used for unregistering client session.

Session is the struct used to keep tracking the progress of a client.