Release Notes - v0.202.7

v0.202.7 (September 3, 2026)

Title: Strengthen validation and request reliability

Date: September 3, 2026

Version: v0.202.7

This release strengthens certificate and transaction validation, improves leiosfetch request handling, and adds Shelley stake pool certificate validation across supported eras.

💪 Improvements

• Strengthened certificate and governance validation: Certificate and governance voter authorization now require the appropriate witnesses. The same credential rules now apply when validating key and script credentials, while stricter checks for Plutus redeemer pointers and native scripts and corrected mixed withdrawal redeemer ordering improve transaction validation. Exported MIR genesis delegate quorum APIs let applications validate quorum directly.

• Hardened transaction and redeemer index validation: Alonzo and Dijkstra now reject any index whose value overflows the platform integer type or falls outside the relevant collection bounds, including on 32-bit builds.

• Improved leiosfetch request handling: Unconfigured requests no longer hang and now return an explicit no-block response or a connection error as appropriate. Request types now use a shared coordinator that preserves streamed range delivery and completes abandoned requests safely. VotesRequest and BlockRangeRequest now accept context parameters so callers can control request lifetimes.

• Added Shelley stake pool certificate validation: Validation now checks POOL certificates from Shelley through Dijkstra, including minPoolCost, the reward account’s network, VRF key reuse, registration, and retirement checks. Typed errors and support for protocol parameters and epoch capabilities expose validation failures and era-specific requirements to applications.

Recommended Network Compatibility ⚠️

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

Release: v0.202.7

Compare: v0.202.6…v0.202.7

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Docs authored by Doc Holiday