Release Notes - v0.73.4

v0.73.4

Title: Improve protocol compatibility, resilience, and operational safety

Date: 2026-09-28

Version: v0.73.4

Release: v0.73.4

This release improves protocol compatibility, validation, storage efficiency, network safety, and operational resilience across the Dingo node and its examples.

Recommended Network Compatibility ⚠️

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

Protocol and consensus improvements

Updated protocol support for shared committee hot key authorization, Leios backfill failover, correct Bark archive era handling, and MIR quorum coverage.
Added Dijkstra Leios committee selection with key age filtering, semantic endorser block validation, certificate checks, and prompt vote cancellation.
Improved database and chain synchronization by making SQLite VACUUM opt in, releasing ChainSync locks during deferred persistence, using prepared UTxO lookups, and expanding metrics.
Deferred S3 and GCS blob listings until the first read while preserving bounded seek behavior.
Aligned classic protocol parameter update windows and quorum selection with the reference behavior, including storage for epoch 0 proposals.
Enforced zero baselines for the first operational certificate and stopped safely after incomplete Mithril restores.
Corrected Byron initialization to accept empty genesis setup while rejecting Byron era regressions and typed nil headers.
Refined Conway Plutus context and cost model behavior to match the reference behavior.
Blocked private and special use Koios destinations by default, with an explicit opt in for deployments that require them.

Dependency and example updates

Refreshed database telemetry integration so current database instrumentation remains available.
Upgraded the SQLite driver dependency to the current modernc.org/sqlite release.
Modernized the Blockfrost example’s Node.js type definitions.
Revised the Sundae example’s Node.js type definitions.
Expanded SundaeSwap core and math support for v4 stableswap quoting.
Preserved required EventBus subscribers as back pressure builds, keeping required event consumers available.
Accelerated the Blockfrost example’s development tooling with the current Vite release.
Introduced the current Vite release in the Sundae example’s development tooling.
Expanded the documentation with docs/development.md, docs/devnet.md, and docs/benchmarks.md, and placed generated benchmark results under docs/benchmarks/.

Reliability and operations

Scoped Dijkstra reference input overlap checks to executed Plutus contexts.
Replaced AWS SDK credential modules with their current implementations.
Strengthened forging recovery with improved retry handling and an empty block fallback.
Restored Conway committee voting and state enforcement to the required protocol rules.
Registered block producer cleanup before startup can fail, preserving cleanup during early startup errors.
Applied the canonical Byron clock skew tolerance.
Bounded Leios endorser block transaction selection by the slot deadline.
Introduced operator controls through forgeEbSelectionReserve, forgeEbMaxTxRefs, and forgeEbMaxBytes, with matching --forge-eb-selection-reserve, --forge-eb-max-tx-refs, and --forge-eb-max-bytes flags and DINGO_FORGE_EB_SELECTION_RESERVE, DINGO_FORGE_EB_MAX_TX_REFS, and DINGO_FORGE_EB_MAX_BYTES environment variables. Unset values retain their defaults, while an explicit zero disables a cap.
Exposed dingo_forge_eb_selection_seconds and dingo_forge_eb_selection_truncated_total, together with timing details, so operators can identify truncated selection and measure selection, construction, and broadcast time.
Stabilized token registry snapshot synchronization by applying each snapshot atomically.
Safeguarded ChainManager metric reuse so the node avoids conflicting registrations.
Shifted reward crediting away from the epoch boundary and added resumable precomputation with metrics.
Simplified the README and configuration defaults.

Docs authored by Doc Holiday

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Last updated: Oct 8, 2026