Skip to content

Weekly development report as of 2023-05-19

Weekly development report as of 2023-05-19



This week, the networking team worked on a new way to switch between root and ledger peers and continued working on Eclipse Evasion. They also made changes to the handshake protocol, improved flaky tests, and added cddl specs for NodeToNodeVersionData and NodeToClientVersionData. Finally, the team improved the CI and automated the process of releasing new packages to CHaP.

During the past two weeks, the consensus team made more improvements to the Ouroboros Genesis design in collaboration with the research and networking teams. These improvements affect the Genesis selection rule, candidate rule, and root peers usage. See this section for more details.

Regarding the UTXO-HD prototype, the team created a pull request that enhances the DB locking mechanism. They also began the process of porting the mempool fairness improvements from their main branch and integrated a new open source library that implements cancellative monoids. This integration simplifies the code and achieves a slight performance gain.

The team also made enhancements to their tooling by releasing an immutable DB server. This server can be used for testing and benchmarking purposes. Finally, they developed a db-truncater program useful in recovery and benchmarking scenarios.

As always, see this technical development report for more details from different teams.


This week, the Daedalus team finalized work on the proxy server to provide ada conversion rates from the CoinGecko API reliably. They are now preparing a Daedalus release that will switch to the new endpoint. 

The Lace team continued working on Trezor integration with the in-browser app, started working on the layout improvements in line with community requests, and worked on some open source features. The SDK used by Lace, the cardano-js-sdk, is open source and you can learn more about it in this post.

Work is ongoing on desktop version development. The team has established the multi-delegation project framework and added the necessary components to integrate it with the build process (CI). Additionally, they enhanced the process of implementing CIP-17 in cardano-js-sdk.

The Adrestia team worked on separating the balance TX library, database enhancements, and on finalizing the multi-signature wallet delegation functionality.


This week, the Plutus tools team focused on resolving a bug in Marconi and verifying the correctness of the AddressUtxo indexer by comparing it with cardano-db-sync. The team is also investigating a regression in sync time within the AddressUtxo indexer. They worked on retrieving burned token events exclusively from the MintBurn indexer and explored the integration of the standalone emulator with Atlas. Finally, their objectives include developing a well-defined Haskell interface for the standalone emulator.

The Plutus core team implemented an optimization pass called Float Delay for Untyped Plutus Core, which led to significant improvements in program sizes and costs. They've also updated the Plutus Core specification for sums-of-products and kept working on formalizing sums-of-products in Agda.

The Marlowe team updated and retested the GHCI environment for Marlowe, ensuring its stability and functionality. They also implemented a protocol to support incremental loading and merkleization of contracts, configured the cucumber testing framework for the Marlowe Playground repository, and created a version of Marlowe validators with minimal dependencies. 

Finally, they continued working on the new documentation site.


The Hydra team accomplished several milestones, notably the release of the first mainnet-compatible Hydra node version. They also focused on addressing inconsistencies in rollback handling, added a Hydra node architecture explainer to the website, and reduced log sizes using event IDs. Furthermore, the team engaged in productive discussions with researchers to outline plans for incremental commits/decommits and participated in a whiteboard session on DeFi and lending protocols.

This week, the Mithril team finalized the implementation of the framework to sign generic types of data in the aggregator and the signer nodes. They also updated the runtime of the aggregator to handle open messages associated with the available types, and evolved the REST API of the aggregator to deliver the artifacts for these types. Additionally, they have upgraded the network explorer in order to display the artifacts and certificates for the different types of data.

Finally, the team started implementing the new stake distribution computation available from Cardano node v.8.0.0 (along with the backward compatibility for previous 1.35.x versions).


This week in Voltaire, the conversations on CIP-1694 continue with the first workshops starting this weekend!

The workshops, which will take place from May to July, will explore the latest developments in Cardano's on-chain governance proposed in CIP-1694. The in-person workshops will take place in over 20 locations worldwide, giving attendees the opportunity to network, confer, and collaborate with their local Cardano communities. On top of that, there will be over 25 virtual workshops, further opening opportunities to those who cannot attend in person.

An interactive map and further details are available on Essential Cardano. 


Last week, the Project Catalyst team held its 126th town hall meeting. You can watch a full recording here. During the meeting, the projects presented their latest completed work, including Ada Quest and the Decentralized Music Platform (DEMU) preview. If you're interested in joining the next town hall, they're held at 5pm every Wednesday on both YouTube and Zoom. You can find the invitation link here, and the next one is scheduled for May 24th. Additionally, if you're curious about the status of funded projects, you can check out


This week, the Education team worked on preparing a feedback survey for participants in the 4th iteration of the Plutus Pioneer program, as well as an internal retrospective. They are also planning the next in-person Haskell course for later this year and preparing content for the Cardano Days workshops planned for the summer. Additionally, the team is focusing on writing sections for Mastering Cardano.



この2週間、コンセンサスチームは研究チームやネットワークチームと協力して、Ouroboros Genesisの設計のさらなる改良に取り組んできました。これは、Genesis選択ルール、候補ルール、ルートピアの使用に影響します。詳しくはこのセクションをご覧ください。





Daedalusチームは、CoinGecko APIからのADA換算率を確実に提供するプロキシサーバーの作業を完了しました。現在、新しいエンドポイントに切り替えるDaedalusのリリースを準備しています。 



Adrestiaチームは、Balance TXライブラリーの分離、データベースの強化、マルチシグウォレット委任機能の仕上げに取り組みました。



Plutus Coreチームは、型なしPlutus Coreに対してFloat Delayと呼ばれる最適化パスを実装し、プログラムのサイズとコストを大幅に改善しました。また、sums-of-productsのPlutus Core仕様を更新し、AGDAでsums-of-productsの形式化に取り組んでいます。

MarloweチームはMarloweのGHCI環境を更新し、再テストし、安定性と機能性を確保しました。コントラクトのインクリメンタルロードとマークル化をサポートするプロトコルを実装し、Marlowe Playgroundリポジトリ用のCucumberテストフレームワークを設定し、Marloweバリデーターのバージョンを最小限の依存関係で作成しました。 


Basho( スケーリング)


Mithrilチームは、アグリゲーターノードと署名者ノードで汎用データ型に署名するためのフレームワークの実装を完了しました。利用可能な型に関連付けられたオープンメッセージを処理するようにアグリゲーターのランタイムを更新し、これらの型のアーティファクトを配信するよう、アグリゲーターのREST APIを進化させました。さまざまなデータ型の証明書とアーティファクトを表示するために、ネットワークエクスプローラーをアップグレードしました。





インタラクティブマップ詳細情報は、Essential Cardanoをご覧ください。 


Project Catalystチームは126回目のタウンホールミーティングを開催しました。詳細はこちらからご覧ください。ミーティングでは、Ada QuestやDEMU(分散型音楽プラットフォーム)のプレビューなど、最新の完了済みプロジェクトが発表されました。タウンホールは毎週日本時間木曜日の午前2時から、YouTubeとZoomで開催されています。参加をご希望の方は、この招待リンクから登録してください。次回は5月24日に予定されています。資金提供されたプロジェクトの進捗状況に興味がある場合は、で確認できます。 


教育チームは、第4回Plutusパイオニアプログラムの参加者向けのアンケートと社内反省会の準備に取り組みました。今年後半には対面型Haskellコースを計画しており、夏に予定されているCardano Daysワークショップのコンテンツの準備も行っています。Mastering Cardano(Cardanoを極める)の各セクションの執筆にも注力しています。