struct FrameHeader
fbs/transport.fbs / Source schema
Fixed-layout header carried by the optional multiplexed Frame transport.
| Name | Type | Unit / Scale | Notes |
|---|---|---|---|
timestamp_us | ulong | microseconds | Frame publication timestamp in monotonic boot time. |
sequence | uint | Monotonic sequence counter for loss/reorder detection. | |
flags | ushort | bitmask | Frame-envelope bitmask for serial or raw byte-stream features; zero means no envelope extensions. |
topic_id | TopicId | Numeric topic identifier for the enclosed message. | |
system_id | ubyte | Source system identifier for links without key-based routing. | |
component_id | ubyte | Source component identifier. | |
protocol_version | ubyte | Synapse wire/schema compatibility version used by the publisher. |