Add Ledger team update for 2023-09-01 (#229)

blog/2023-09-01-ledger.md

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+---
+title: Ledger Team Update
+slug: 2023-09-01-ledger
+authors: lehins
+tags: [ledger]
+hide_table_of_contents: false
+---
+
+## High level summary
+
+Broadly speaking the Ledger team focused on a few main areas of Conway era:
+
+* Creation of voting state snapshots in order to correctly delay ratification for one epoch
+* Validation of the Governance Actions sequencing and ordering
+* Proper expiry of DReps and Proposal Procedures
+* Expanding Conway Genesis functionality
+* Utilization of some of the new Protocol Parameters in ledger validation rules
+
+## Low level summary
+
+### Conway era
+
+* [pull-3659] - Validate Network for ProposalProcedure and TreasuryWithdrawal
+* [pull-3637] - Avoid using sequence of tuples, by adding GovActionId to GovActionState
+* [pull-3651] - Inactive DReps
+* [pull-3664] - Track proposal expiry
+* [pull-3668] - Add min committee size predicate to NewCommittee
+* [pull-3669] - Add Proposal deposit check against PParam
+* [pull-3676] - Fix inactive PoolStake not counting as Drep Stake
+* [pull-3635] - Make snapshots of GovActionsState
+* [pull-3670] - Validate previously enacted govAction
+* [pull-3694] - Improve error reporting on the positive coin decoder
+* [pull-3674] - Added RATIFY thresholds
+* [pull-3684] - Add proposal delaying, remove predicate failure from ENACT
+* [pull-3688] - DRep Refunds and update evalTransactionBalance
+
+### Improvements and releasing
+
+* [pull-3677] - Minor patch that fixes the DRep distribution computation
+* [pull-3686] - Post patch release fixup
+* [pull-3695] - Changelog for cardano-node-8.3 release
+* [pull-3683] - Add two new bench mark programs
+
+### Testing
+
+* [pull-3662] - Equality on raw types
+
+[pull-3659]: https://github.com/input-output-hk/cardano-ledger/pull/3659
+[pull-3637]: https://github.com/input-output-hk/cardano-ledger/pull/3637
+[pull-3651]: https://github.com/input-output-hk/cardano-ledger/pull/3651
+[pull-3664]: https://github.com/input-output-hk/cardano-ledger/pull/3664
+[pull-3668]: https://github.com/input-output-hk/cardano-ledger/pull/3668
+[pull-3669]: https://github.com/input-output-hk/cardano-ledger/pull/3669
+[pull-3662]: https://github.com/input-output-hk/cardano-ledger/pull/3662
+[pull-3676]: https://github.com/input-output-hk/cardano-ledger/pull/3676
+[pull-3677]: https://github.com/input-output-hk/cardano-ledger/pull/3677
+[pull-3635]: https://github.com/input-output-hk/cardano-ledger/pull/3635
+[pull-3683]: https://github.com/input-output-hk/cardano-ledger/pull/3683
+[pull-3686]: https://github.com/input-output-hk/cardano-ledger/pull/3686
+[pull-3670]: https://github.com/input-output-hk/cardano-ledger/pull/3670
+[pull-3694]: https://github.com/input-output-hk/cardano-ledger/pull/3694
+[pull-3674]: https://github.com/input-output-hk/cardano-ledger/pull/3674
+[pull-3684]: https://github.com/input-output-hk/cardano-ledger/pull/3684
+[pull-3695]: https://github.com/input-output-hk/cardano-ledger/pull/3695
+[pull-3688]: https://github.com/input-output-hk/cardano-ledger/pull/3688