Derivatives FIX Header/Trailer Messages

All FIX messages (administrative and business) require a Standard Header and Standard Trailer component.

Standard Header

Tag	Name	FIX Type	Req	Description
8	BeginString	String(7)	Y	FIX version for session, e.g., FIX.4.4.
9	BodyLength	Int(6)	Y	Number of bytes in the message body.
35	MsgType	String(2)	Y	FIX message type.
34	MsgSeqNum	Int(9)	Y	Message sequence number.
43	PossDupFlag	Boolean(1)	N	Flag that represents whether or not the message may have been retransmitted with this sequence number. Must be Y for messages sent in response to a Resend Request from the exchange.
49	SenderCompID	String(6)	Y	Consists of SubFirmID and SessionID. SubFirmID is left-most 3 chars. SessionID is right-most 3 chars. Example: EBR123 To Exchange: Connection ID assigned by Coinbase Derivatives Exchange. From Exchange: Value from order entry tag 56, TargetCompID: COIND
50	SenderSubID	String(18)	Y	Unique identifier for the end trader submitting orders, issued by an exchange clearing member firm (clearing member), their contracted vendors, or assignees
116	OnBehalfOfSubID	String(18)	N	Can be used to identify the end trader submitting orders if SenderSubID (50) is populated by a third party connection provider.
52	SendingTime	UTCTimestamp(21)	Y	Time the message was transmitted, expressed in UTC, microseconds: YYYYMMDD-HH:MM:SS.ssssss.
56	TargetCompID	String(7)	Y	To Exchange: ID of entity receiving the message: COIND From Exchange: Value from order entry SenderCompID (49), example: EBR123
57	TargetSubID	String(20)	Y	To Exchange: ID of destination exchange system: PROD or TEST From Exchange: Echo back TargetSubID (57) sent by client system
122	OrigSendingTime	UTCTimestamp(21)	C	For resent messages only, contains timestamp from SendingTime (52) from original message.
369	LastMsgSeqNumProcessed	Int(9)	N	MsgSeqNum (34) of the last message from the client received and processed by the gateway.

Standard Trailer

Tag	Name	FIX Type	Req	Description
10	CheckSum	String(3)	Y	Always the last tag in a message. Functions as end-of-message delimiter.