Function expiry_key

nodedb/src/engine/kv/engine_helpers.rs:16–21

Construct a composite key for the expiry wheel: "{tenant_id}:{collection}\0{key_bytes}". The null byte separator is safe because collection names can't contain null.

(tenant_id: u64, collection: &str, key: &[u8])

/// Construct a composite key for the expiry wheel: "{tenant_id}:{collection}\0{key_bytes}".
/// The null byte separator is safe because collection names can't contain null.
pub(super) fn expiry_key(tenant_id: u64, collection: &str, key: &[u8]) -> Vec<u8> {
    let prefix = format!("{tenant_id}:{collection}\0");
    let mut composite = prefix.into_bytes();
    composite.extend_from_slice(key);
    composite
}

/// Parse a composite expiry key back into (tenant_id, collection, key_bytes).
pub(super) fn parse_expiry_key(composite: &[u8]) -> Option<(u64, String, Vec<u8>)> {