Release Notes - v0.67.1

v0.67.1 (July 25, 2026)

Title: Improve Leios gating, ledger import, and compatibility

Date: July 25, 2026

Version: v0.67.1

This release improves Leios certified-closure gating, restores governance action IDs during ledger import, reduces UTxO update statement churn, clarifies CBOR cache clearing, and adds prototype 2026w30 compatibility for Dijkstra and Leios messages.

Recommended Network Compatibility ⚠️

Network	Compatible
mainnet	⛔
preprod-testnet	✅
preview-testnet	✅
musashi	✅

✨ Highlights

• Improved certified-closure gating so certifying Leios ranking blocks now wait for the required certified endorser block effects before they commit, and retry after a short delay when the closure is unavailable.

• Restored prior governance action IDs during ledger state import so ratified Conway governance metadata matches the certified state.

• Reduced prepared statement churn in UTxO update paths by reusing stable SQL statement shapes for metadata persistence.

• Clarified that mutating decoded structs that embed DecodeStoreCbor requires SetCbor(nil) before MarshalCBOR to avoid re-emitting cached bytes.

• Added prototype-2026w30 compatibility for Dijkstra stake-pool registration certificates and Leios Notify block announcements.

• Recorded the v0.67.0 release entry so the release index stays complete.

Full Changelog: v0.67.0…v0.67.1