Release Notes - v0.204.7

v0.204.7

Title: Improve authentication, ledger validation, and protocol reliability

Version: v0.204.7

This release improves DMQ operational certificate authentication, ledger validation and transaction processing, and LocalStateQuery and handshake protocol reliability.

🐛 Bug Fixes

• Fixed DMQ operational certificate authentication: Real pool messages now pass CIP-0137 authentication because verification uses raw OCertSignable bytes and KES evolution starts from the certificate issuance period. The verifier rejects messages with an earlier payload KES period.

• Corrected Shelley genesis slot length encoding: slotLength now serializes as integer microseconds for wire compatibility, and the encoder returns an error when a value cannot be represented exactly at microsecond precision.

• Improved transaction validation performance: Transaction validation reuses each UTxO lookup within a single pass.

• Hardened ledger era conversion: Missing or empty collateral outputs now return typed resolution errors, zero-policy assets with non-empty names participate in conservation checks, and Babbage UTxO-RPC returns nil for absent datum hashes.

• Added Dijkstra transaction offset support: Both current and legacy block body and transaction shapes now yield correct transaction offsets. Unsupported Dijkstra layouts return errors instead of empty success.

• Completed LocalStateQuery immutable-tip transitions: Acquire and reacquire operations now work for immutable tips, and failed acquisitions clear client state so callers can retry without stale era information.

• Ensured handshake message ordering: Handshake completion callbacks now run only after the AcceptVersion response reaches the wire, preventing follow-on protocol traffic from overtaking acceptance.

Release: v0.204.7

Compare: v0.204.6…v0.204.7

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Docs authored by Doc Holiday