Release Notes - v0.61.2

v0.61.2 (July 6, 2026)

Title: Improved peer recovery, validation, and Leios reliability

Date: July 6, 2026

Version: v0.61.2

This release improves peer recovery, validation, outbound connectivity, and archive safety.

Recommended Network Compatibility ⚠️

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

✨ Highlights

• Added safer peer rotation for discovered and public-root peers so Dingo stops reconnecting to peers that never connected, tracks prior connections, and backs off repeated dial failures.

• Improved switched peer cursor handling so Dingo realigns cursors and resyncs when the selected cursor advances beyond the local tip.

• Corrected Praos epoch nonce assembly across Mithril and epoch boundaries and healed missing Mithril gap block nonces at startup.

• Fixed chain block number queries so genesis and tip lookups return the expected origin.

• Updated outbound dialing so Dingo rotates across resolved backend IPs, refreshes DNS results, and falls back safely when a target address fails.

💪 Improvements

• Expanded Leios endorser persistence so blocks reach blob storage asynchronously instead of blocking the write path.

• Strengthened Leios backfill cooldowns so repeated failures trigger longer per-connection backoff.

• Extended the Musashi keep-alive timeout so healthy connections stay open longer during transient delays.

• Updated gouroboros through v0.186.2 and v0.186.3 so Dingo picks up the latest upstream fixes and compatibility updates.

• Added configurable consumed UTxO validation so strict mode and Mithril boundary checks can gate validation when required.

🔧 Fixes

• Improved chainsync recycling so Dingo waits for ledger backlog to clear and reconcile before recycling peers.

• Surfaced unrecoverable chainsync rollback loops with metrics and operator warnings so stuck recovery paths are easier to detect.

• Rejected recovery attempts below the Mithril boundary so restoration stays inside the supported trust range.

• Tightened block verification so pool registration and block numbers stay in step before a block is accepted.

• Hardened Bark archive downloads by requiring HTTPS, validating archive block URLs, capping download size, and allowing only approved hosts.

🧪 Testing, CI, Docs, and Release Tooling

• Verified zero-length Leios endorser blocks by point hash before decoding them so malformed records stop at the boundary.

• Refreshed the linter workflow so golangci-lint stays current.

• Replenished ledger peers more aggressively when upstream sources run low.

• Optimized committee voting queries so voting lookups complete faster under load.

• Updated the example app dependencies so the Node type definitions stay current.