Function hlc_from_key

nodedb/src/control/array_sync/op_log.rs:53–60

Parse the HLC from the tail of a composite key. Returns `None` if the key is shorter than `prefix_len + 18`.

(key: &[u8], prefix_len: usize)

///
/// Returns `None` if the key is shorter than `prefix_len + 18`.
fn hlc_from_key(key: &[u8], prefix_len: usize) -> Option<Hlc> {
    if key.len() < prefix_len + 18 {
        return None;
    }
    let start = key.len() - 18;
    let hlc_bytes: [u8; 18] = key[start..].try_into().ok()?;
    Some(Hlc::from_bytes(&hlc_bytes))
}

/// Persistent array op-log backed by a dedicated redb database.
///