InstrumentStatusIncremental

A live change to an instrument’s trading status. Direction: Kraken → client

ID	Field	Type	Encoding	Presence	Description
1	`instrumentId`	`InstrumentId`	field	required
2	`instrumentStatus`	`InstrumentTradingStatus`	field	required
3	`instrumentStatusSeq`	`uint64`	field	required	Contiguous per-instrument status sequence, starting at one
4	`reason`	`StatusReasonEncoding`	var data	required	Human-readable reason for this status update, empty when no reason was supplied

Every message is preceded by the standard SBE messageHeader (blockLength, templateId, schemaId, version). See encodings.