Release Notes - v0.197.0

v0.197.0 (August 25, 2026)

Title: Improve relay and reward validation

Date: August 25, 2026

Version: v0.197.0

This release strengthens relay boundary validation, clarifies reward withdrawal rules across ledger eras, and adds repeatable script view performance benchmarks.

💪 Improvements

• Fixed pool relay boundary handling: Pool relays now reject ports above 65535 for single host address and name relays, and hostnames longer than 128 bytes for single host name and multiple host name relays. The rules accept valid boundary values and return pool relay port must not exceed 65535 or pool relay hostname must not exceed 128 bytes for invalid values. See pool relay boundary details.

• Refined reward withdrawal validation: Transactions from before the Dijkstra era must withdraw the full reward balance. Dijkstra transactions cannot withdraw more than the balance, and partial withdrawals remain available when transactions use no Plutus V1, V2, or V3 scripts. Transactions that use those scripts must withdraw the full balance. Validation now considers scripts in Dijkstra subtransaction witnesses, reports typed IncorrectWithdrawalAmountError details, and propagates balance lookup failures. Mock fixtures now use version v0.16.1. See reward withdrawal validation details.

• Added script view performance benchmarks: The test suite now measures construction across transactions with no scripts, a single script spend, and multiple transaction purposes, providing deterministic coverage for performance comparisons. See benchmark details.

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Docs authored by Doc Holiday