The type of peer scoring statistics.

newly_connected params creates a fresh statistics record.

value ps evaluates the score of ps.

penalty ps penalty increments the behavioural penalty of ps.

set_connected ps marks ps as being associated to a connected peer.

remove_peer ps ~retain_duration will either return None if the peer statistics can be cleared, or Some ps' with ps' some statistics to be retained for at least retain_duration.

expires ps returns None if the score statistics has no expiration time or Some t if it expires at time t.

graft ps topic allows to measure the time spent by the peer in the mesh. It is to be called upon grafting a peer to topic.

prune ps topic allows to measure the time spent by the peer in the mesh. It is to be called upon pruning a peer from topic.

first_message_delivered ps topic increments the counter related to first message deliveries and mesh message deliveries on topic by the associated peer.

duplicate_message_delivered ps topic validated increments the counter related to near-first mesh message deliveries on topic by the associated peer. validated is the time at which the message was seen by the automaton for the first time.

invalid_message_delivered ps topic increments the counter related to invalid messages sent by the associated peer.

set_application_score ps score sets the application-specific score. This score can be positive or negative.

refresh ps returns Some ps' with ps' a refreshed score record or None if the score expired. Refreshing a ps allows to update time-dependent spects of the scoring statistics.

The zero score value, corresponding to a neutral score.

Convert a float into a score value.