Struct WriterLog 

pub struct WriterLog;

Stateless operations over the chained log table.

Implementations

impl WriterLog

pub fn ensure_schema(db: &dyn Backend) -> Result<()>

Create the backing table if it does not exist. Idempotent.

pub fn head( db: &dyn Backend, stream: &str, writer: &str, ) -> Result<Option<Entry>>

The highest-seq entry for (stream, writer), or None if empty.

pub fn append( db: &dyn Backend, stream: &str, writer: &str, payload: &[u8], ) -> Result<Entry>

Append payload, computing the next seq and chained content_hash.

pub fn entries( db: &dyn Backend, stream: &str, writer: &str, ) -> Result<Vec<Entry>>

All entries for (stream, writer), ascending by seq.

pub fn verify(db: &dyn Backend, stream: &str, writer: &str) -> Result<()>

Recompute the chain and reject any gap, reorder, or tamper.