Enum ChainFeed 

pub enum ChainFeed {
    Complete(WalHeader, Vec<u8>),
    Pending,
}

Result of feeding one record to a ChainAssembler.

Variants

Complete(WalHeader, Vec<u8>)

This LSN’s commit’s framing is fully reconstructed: header plus the logical body ([op_set_len:4][op_set][command bytes, possibly empty] — exactly WITH_COMMAND’s own body shape), ready to decode via decode_logical_body. Decoding is a separate, explicit step — deliberately never done inside ChainAssembler::feed — so a content corruption (e.g. an unparsable embedded CommitBatch, metadata_retirement_rejects_a_corrupt_wal_command_envelope’s exact case) is never mistaken for a torn write and silently truncated by a caller that only wants structural chain-completeness (read_segment’s recovery pass checks is_open()/open_start_offset() and never calls decode_logical_body at all).

Pending

More fragments are still expected for this LSN; nothing to decode yet.