Function array_from_key

nodedb/src/control/array_sync/ack_registry.rs:43–54

Parse the array name from the head of a composite key. Returns `None` if the key is malformed.

(key: &[u8])

///
/// Returns `None` if the key is malformed.
fn array_from_key(key: &[u8]) -> Option<String> {
    if key.is_empty() {
        return None;
    }
    let name_len = key[0] as usize;
    if key.len() < 1 + name_len + 8 {
        return None;
    }
    std::str::from_utf8(&key[1..1 + name_len])
        .ok()
        .map(|s| s.to_owned())
}

/// Parse the replica_id from the tail of a composite key.
fn replica_id_from_key(key: &[u8]) -> Option<u64> {