Method local_set_id

atomic-remote/src/sync.rs:478–486

Fold a set of base32 change hashes into the view's order-invariant [`SetId`](atomic_core::types::SetId) string. Returns `None` if any hash is not valid base32, in which case the caller must fall back to the Merkle dichotomy rather than risk a false "in sync" from a partially-folded set. The domain is the local view's applyable change set — it must match byte-for-byte the domain the server folds

(local_hashes: &HashSet<String>)

    /// (changes and tags, sidecars excluded); see the cross-producer contract
    /// on [`atomic_core::types::SetId`].
    fn local_set_id(local_hashes: &HashSet<String>) -> Option<String> {
        use atomic_core::types::{Base32, Merkle, SetId};
        let mut acc = SetId::ZERO;
        for hash in local_hashes {
            let merkle = Merkle::from_base32(hash.as_bytes())?;
            acc = acc.add(&merkle);
        }
        Some(acc.to_base32())
    }

    // Dichotomy Algorithm — O(log n) divergence detection