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35 lines
1.2 KiB
Nim
35 lines
1.2 KiB
Nim
## Wire format for a single segment, per the Reliable Channel API spec.
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##
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## Skeleton: encode/decode treat the segment as just its payload bytes,
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## since for now we only ever produce a single segment per send.
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type SegmentMessageProto* = object
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entireMessageHash*: seq[byte] ## Keccak256(original payload), 32 bytes
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dataSegmentIndex*: uint32 ## zero-indexed sequence number for data segments
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dataSegmentCount*: uint32 ## number of data segments (>= 1)
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payload*: seq[byte] ## segment payload (data or parity shard)
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paritySegmentIndex*: uint32 ## zero-based sequence number for parity segments
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paritySegmentCount*: uint32 ## number of parity segments
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isParity*: bool ## true for parity segments, false (default) for data segments
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proc isParityMessage*(self: SegmentMessageProto): bool =
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self.isParity
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proc isValid*(self: SegmentMessageProto): bool =
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## Validates hash length (32 bytes), segment indices and counts.
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discard
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proc encode*(self: SegmentMessageProto): seq[byte] =
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self.payload
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proc decode*(T: type SegmentMessageProto, buf: seq[byte]): T =
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T(
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entireMessageHash: @[],
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dataSegmentIndex: 0,
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dataSegmentCount: 1,
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payload: buf,
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paritySegmentIndex: 0,
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paritySegmentCount: 0,
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isParity: false,
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)
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