TopOfBook¶ struct TopOfBook¶ Update relating to top of book (aggregate price) Public Members uint16_t stream_id = {}¶ Stream identifier. std::string_view exchange¶ Exchange. std::string_view symbol¶ Symbol. roq::Layer layer = {}¶ Top of book. roq::UpdateType update_type = {}¶ Update type. std::chrono::nanoseconds exchange_time_utc = {}¶ Exchange timestamp, possibly from matching engine (UTC) uint64_t exchange_sequence = {}¶ Exchange message sequence number. std::chrono::nanoseconds sending_time_utc = {}¶ Exchange sending timestamp (UTC)