Release Notes - v0.202.5

v0.202.5 (September 2, 2026)

Title: Refine ledger validation and protocol reliability

Date: September 2, 2026

Version: v0.202.5

This release improves era-specific transaction validity, validates Conway and Dijkstra ledger state more strictly, preserves protocol results during shutdown, and rejects duplicate encoded data.

💪 Improvements

• Improved transaction time limits: Transactions with only an upper validity limit now treat that limit as exclusive in Conway and later eras, while Alonzo and Babbage continue to treat it as inclusive.

• Updated transaction information APIs: StrictValidityUpperBoundForTransaction identifies transactions that use strict upper validity limits. The NewTxInfoV1 and NewTxInfoV2 signatures changed, so applications that call these constructors must update their arguments.

• Strengthened ledger deposit accounting: Conway and Dijkstra certificate deposits and refunds now match recorded ledger state through StakeCredentialDepositState, so the ledger rejects inconsistent deposit values.

• Corrected withdrawal and deregistration accounting: Withdrawals must leave a zero reward balance, and legacy stake credential deregistration now uses the recorded deposit amount.

• Refined committee and constitutional voter checks: Conway now rejects committee certificate and constitutional voter validation when committee records are unavailable or empty, or when a lookup fails. The checks preserve typed credential identity and include the related context in errors.

• Enhanced Plutus script spending checks: Babbage, Conway, and Dijkstra now require a spend redeemer for every input at a Plutus script address, whether the script comes from transaction witnesses or a CIP-33 reference script. Missing redeemers return MissingRedeemerForScriptError.

• Preserved block fetch outcomes during shutdown: When shutdown races with block fetching, the service returns each result that fetching determined, each block it delivered, and errors for incomplete ranges; it does not replace those outcomes with ErrProtocolShuttingDown.

• Rejected duplicate encoded entries: While reading CBOR encoded data, Conway and Dijkstra certificates plus pointer-backed maps for withdrawals, governance, and move instantaneous rewards now reject duplicate logical entries and return structured duplicate errors.

Recommended Network Compatibility ⚠️

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

Release: v0.202.5

Compare: v0.202.4…v0.202.5

---

Docs authored by Doc Holiday