Release Notes - v0.207.3

v0.207.3

Title: Improve era validation, network protocol handling, and transaction compatibility

Version: v0.207.3

This release strengthens protocol decoding and encoding, transaction validation, era compatibility, and shutdown behavior across the Byron, Alonzo, Babbage, Conway, and Dijkstra eras.

Bug Fixes

• Improved LeiosNotify vote offer handling by limiting each message to 1,000 votes and 256 KiB, rejecting malformed or trailing CBOR, and documenting these limits.
• Refined minimum UTxO calculation for Babbage, Conway, and Dijkstra by measuring preserved wire CBOR and aligning Alonzo empty policy sizing.
• Aligned Byron PBFT admission, genesis delegation, historical Ed25519 behavior, transaction WireId and Id behavior, and witness validation with protocol rules.
• Verified TPraos nonce VRFs and made operation certificate extraction return errors for nil or unsupported headers.
• Strengthened Plutus context and UTXOW validation for Byron outputs, datum and redeemer rules, collateral, forecast handling, Dijkstra subtransaction indexes, and execution unit decoding.
• Enforced reliable shutdown by joining ChainSync operations, propagating connection shutdown to LeiosVotes callbacks, and preventing duplicate BlockFetch completion.
• Corrected Byron historical canonical JSON escaping and stopped JSON parsing after the first complete value instead of waiting for EOF.
• Rejected Dijkstra genesis-only Leios update fields without partially applying an update while retaining on-ledger keys 43 and 44.
• Preserved ordered and duplicate invalid_transactions behavior where required, rejected out-of-range auxiliary-data indexes, and retained legacy Dijkstra duplicate rejection.
• Validated Conway and Dijkstra parameter update domains, nullability, integer widths, bounded ratios, cost model language IDs, MaxPledgeLeverage tri-state values, and PV12 security group classification.
• Added Dijkstra golden coverage to verify encoding and decoding behavior without changing runtime behavior.
• Checked Conway and Dijkstra committee transitions, applied PV10 action restrictions, added PV11+ checks for unelected voters, and required the optional CommitteeVotingState capability.

Release: v0.207.3

Compare: v0.207.2…v0.207.3

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Docs authored by Doc Holiday