Release Notes - v0.204.0

v0.204.0

Title: Make DRep deposit validation fail closed

Version: v0.204.0

This release makes DRep deposit handling safer: deregistration now fails closed when the recorded deposit is absent, refunds compare against recorded deposits when available, in-transaction registrations distinguish complete credentials, and delegation validation reports lookup errors.

💪 Improvements

• Improved DRep deregistration checks: The ledger rejects deregistration when the registered DRep has no recorded deposit and returns DRepDepositStateInconsistentError, preventing a refund without deposit state.

• Applied recorded deposits to refunds: Refund comparisons use the recorded amount whenever a DRep deposit exists.

• Distinguished complete in-transaction DRep credentials: Lookups use the credential type and 28-byte hash, so key and script credentials with matching hashes remain separate.

• Propagated DRep lookup errors during delegation validation: Callers now receive lookup errors instead of unregistered DRep results.

• Added deposit edge case coverage: Automated tests verify fail closed behavior when a deposit is absent and refunds based on recorded deposits.

⚠️ Breaking changes and migration

• Changed DRep registration construction: DRepRegistration.Deposit accepts a pointer to the deposit. Implementations that construct DRep registrations must provide a pointer when a recorded deposit exists and nil when the deposit is absent.

Recommended Network Compatibility ⚠️

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

Release: v0.204.0

Compare: v0.203.0…v0.204.0

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Docs authored by Doc Holiday