Method latest_for_array

nodedb/src/control/array_sync/snapshot_store.rs:167–191

Return the snapshot with the highest HLC for `array`, or `None` if none exist.

(&self, array: &str)

    /// Return the snapshot with the highest HLC for `array`, or `None` if none exist.
    pub fn latest_for_array(&self, array: &str) -> Option<TileSnapshot> {
        let prefix = name_prefix(array)?;
        let txn = self.db.begin_read().ok()?;
        let table = txn.open_table(SNAPSHOT_TABLE).ok()?;

        // Scan the full range and collect prefix-matched keys; last = latest HLC.
        let iter = table.iter().ok()?;
        let mut last_bytes: Option<Vec<u8>> = None;
        for entry in iter {
            let Ok((k, v)) = entry else {
                continue;
            };
            let key = k.value();
            if key.starts_with(prefix.as_slice()) {
                last_bytes = Some(v.value().to_vec());
            }
        }

        let bytes = last_bytes?;
        decode_snapshot(&bytes)
            .map_err(|e| {
                warn!(array = %array, error = %e, "snapshot_store: decode error on latest");
            })
            .ok()
    }

    /// Delete all snapshots for `array` whose `snapshot_hlc < older_than`.
    ///