package example; message SubscriptionHeader { required string subject = 1; } message MarketDataHeader { enum MsgType { MSG_VERIFY = 0; MSG_UPDATE = 1; MSG_CORRECT = 2; MSG_CLOSING = 3; MSG_DROP = 4; MSG_AGGREGATE = 5; MSG_STATUS = 6; MSG_CANCEL = 7; MSG_INITIAL = 8; } required MsgType msg_type = 1; enum RecType { PING = 1; } required RecType rec_type = 2; enum RecStatus { STATUS_OK = 0; STATUS_BAD_NAME = 1; STATUS_BAD_LINE = 2; STATUS_CACHE_FULL = 3; STATUS_PERMISSION_DENIED = 4; STATUS_PREEMPTED = 5; STATUS_BAD_ACCESS = 6; STATUS_TEMP_UNAVAIL = 7; STATUS_REASSIGN = 8; STATUS_NOSUBSCRIBERS = 9; STATUS_EXPIRED = 10; } required RecStatus rec_status = 3; } message Ping { required SubscriptionHeader subscription_header = 1; required MarketDataHeader market_data_header = 2; required fixed64 time = 3; required fixed64 seqno = 4; required fixed64 latency = 5; required bytes payload = 6; }