Event

# Event represents something what should be reported to a subscribed client.
type Event {
    type: EventType!
    auction: Auction
    offer: Offer
}

# EventType represent a type of event reported to a subscribed client.
enum EventType {
    AUCTION_BID,
    AUCTION_BID_WITHDRAW,
    AUCTION_RESERVE_UPDATED,
    AUCTION_RESOLVED,
    AUCTION_CANCELLED,
    GOT_OFFER,
    TRANSFER,
}