Struct Invitation 

pub struct Invitation {
    pub seats: u8,
    pub seat: Option<u8>,
    pub terms: MatchTerms,
    pub names: [WireName; 6],
    pub standing: Option<SeriesStanding>,
    pub beach: Vec<u8>,
}

What a host’s Start invites this peer to: the size of the table, the chair (or none, for a watcher), the terms, who else is at it, where the series stands, and the host’s own beach when it sent one.

Named rather than left the tuple it was, because a tuple is read by counting: (seats, seat, ..) is a count and an index next to each other, and the only thing keeping them apart was their order. Taken up by OnlineSession::take_up whether it arrives in the lobby, mid-round or on the results card, so there is one way to begin a round.

Fields

seats: u8

seat: Option<u8>

terms: MatchTerms

names: [WireName; 6]

standing: Option<SeriesStanding>

Where the series stands, as the host says. A peer that greeted mid-series is seated with the table’s own tally rather than starting a fresh one. None for a single round.

beach: Vec<u8>

The host’s own beach, when it sent one. A joiner has never seen the file it came from, so it arrives with the invitation or not at all.