Release Notes - v0.210.0

v0.210.0

Title: Strengthen protocol limits and expand ledger access

Version: v0.210.0

This release strengthens protocol input and connection resource limits, expands Plutus script evaluation access, and improves Babbage datum handling and documentation.

Improvements

• Improved protocol safety by bounding KES decoding depth at MaxDepth 63, KeyGen depth at MaxKeyGenDepth 12, handshake Propose and Confirm pending messages at 5,760 bytes, and keep-alive active-state messages at 65,535 bytes; the release documents these limits and tests boundary and oversized inputs.
• Added a default 64 MiB connection-wide muxer ingress budget with SetIngressBudget, IngressBudget, IngressInUse, and ErrIngressOverflow; per-role budget extensions and PendingReceiveByteBudget accounting support controlled backpressure. Node-to-client ChainSync receives use an 8 MiB pending receive budget, and protocol limits documentation and tests verify backpressure and release behavior.

New Features

• Expanded Plutus script evaluation access through exported conway.EvaluatePlutusScripts with optional budget semantics and dijkstra.EvaluatePlutusScripts returning per-redeemer consumed ExUnits across sub-transactions, guarding scripts, and V4 contexts; the release also exports ApplyConwayRefScriptFeeDefaults, uses shared validation checks, and returns an error for nil Conway transactions.

Additional Changes

• Clarified Babbage datum handling with nil-safe IsDatumHash and IsInlineDatum predicates, documented Plutus Data constructor tag ranges and how they differ from ledger sum-type list decoding, and added byte-preserving CBOR round-trip tests.

Recommended Network Compatibility ⚠️

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

Release: v0.210.0

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Docs authored by Doc Holiday