Struct FileCursorStore 

pub struct FileCursorStore { /* private fields */ }

A CursorStore backed by a single file, written atomically (temp file + rename) so a crash mid-write never leaves a torn cursor. The on-disk format is one line of four whitespace-separated integers — height tx_index mempool_seq instance_id — stable and trivially inspectable. A missing file loads as None.

Implementations

impl FileCursorStore

pub fn new(path: impl Into<PathBuf>) -> Self

Back the store with path. The file is created on the first save; a missing file is a clean “no cursor yet”.

Trait Implementations

impl Clone for FileCursorStore

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl CursorStore for FileCursorStore

fn load(&self) -> Result<Option<Cursor>, StreamError>

Load the last persisted cursor, or None if none has been saved.

fn save(&self, cursor: Cursor) -> Result<(), StreamError>

Persist cursor as the new resume anchor.

impl Debug for FileCursorStore

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.