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· 2 min read
Damian Nadales

High level summary​

Over the last two weeks, we managed to run a UTxO-HD capable node in legacy mode, which maintains the baseline memory usage while keeping all the ledger state in memory (as the current node does). This legacy mode could provide an alternative for releasing a UTxO-HD capable node where people can choose whether to store the large part of the UTxO set on disk or not. However, legacy mode involves code duplication, requires several weeks of work before it is production ready (more integration and testing). Moreover, we will not release UTxO-HD before Conway to avoid the risk of delaying the latter. On the other hand, to integrate the LSM-tree backend for UTxO-HD we need to redesign the Consensus storage layer, and this new design might enable us to implement an alternative in-memory backing store that will have a very similar performance and resource requirements as the current Cardano node. Therefore, during the coming months we will focus our efforts on the redesign of the storage layer and the LSM-tree backend.

On the Genesis front, we reviewed the peer simulator for Genesis tests, which was implemented by Tweag and was signed-off by the Consensus team.

We also continued our work on improving the handling of blocks from the future. We presented possible approaches to handling blocks from the future in the Chief Scientist Meeting at IOG, which was very well-received. The discussion with the IOG scientists touched upon the relationship of this approach to Ouroboros Chronos.

Javier Sagredo continues his cycle as release engineer, and he is working on version 8.7 of Cardano node.

· One min read
Jean-Philippe Raynaud

High level overview​

This week, the Mithril team completed the adaptation of the Mithril client as a library. They progressed in decentralizing the Mithril networks with the peer-to-peer (P2P) networking proof-of-concept, achieving the implementation of P2P signatures broadcast with the relay in the end-to-end tests. Additionally, the team completed the proof-of-concept for the deterministic computation of the UTXO/transactions set from the immutable files.

Finally, they continued addressing some performance issue associated with the 'release-mainnet' aggregator, and fixed a bug with the tool used to process batch certificate hash re-computation.

Low level overview​

  • Worked on the issue Prototype a P2P relay with libp2p #1300
  • Completed the issue Light Wallet: Release mithril-client library #1311
  • Completed the issue Light Wallet: Compute deterministic Cardano UTxO/transactions set PoC #1283
  • Completed the issue release-mainnet aggregator is unreachable #1310
  • Completed the issue Fix certificate hashes re-computation in aggregator #1343
  • Completed the issue Remove unstable tag in unstable release #1235
  • Worked on the issue Enhance aggregator REST API performances #1327
  • Worked on the issue Signer runtime is stuck for some SPO #1312

· 2 min read
Carlos LopezDeLara

2023-11-01 - 2023-11-14

High level summary​

CARDANO-NODE

CARDANO-CLI

  • Improve golden tests
  • Clean-up of conway era commands

cardano-cli​

cardano-api​

cardano-node​

cardano-testnet​

docs​

CI & project maintenance​

· One min read
James Chapman

The team works on applied research and consulting in formal methods that is directly applicable to evidence based engineering in Core Tech and beyond.

High level summary​

The team is currently formalising mini protocols and working on a performance modelling paper

Details​

  • completing work on chain sync mini-protocol

  • specifying correctness property of chain sync mini-protocol

  • creating diagrams for JLAMP paper

  • finalising structure of JLAMP paper

· 2 min read
Sebastian Nagel

High-level summary​

The last two weeks, the Hydra team achieved several milestones. They published the monthly report for October, providing updates on project developments. The team delivered a presentation and workshop at the Cardano Summit, contributing to community engagement. They implemented a \"dirt road\" solution for the \"Ignored init tx\" notification and moved the hydra-poll example project to a dedicated repository. Additionally, the team built a hydra-chain-observer tool for Hydra Heads, updated the toolchain to GHC 9.6.3, and made various improvements to tooling and code formatting. They addressed specific issues, such as fixing the gen-hydra-keys command and resolving concerns with the rewritten hydra-tui. The team also enhanced the hydra-cluster smoke test suite by fetching network configurations dynamically. Lastly, they actively reviewed pull requests and architectural decision records from the community, including contributions from SundaeSwap. An experiment, the Hydra tally, was completed and successfully deployed to the mainnet by the Cardano Foundation.

What did the team achieve this week​

  • Published the monthly report for october
  • Given a presentation / workshop at the Cardano summit #1109
  • Dirt road implementation for \"Ignored init tx\" notification #529 (without stateless observation)
  • Completed and moved hydra-poll example project into a dedicated repository
  • Built a first version of a chain observation tool for Hydra Heads #1096
  • Switched toolchain to GHC 9.6.3 and various improvements on tooling and code formatting #1135#1152#1151#1154
  • Fix gen-hydra-keys command to not overwrite existing keys #1136
  • Fixed the rewritten hydra-tui#1113#1137
  • Fetch network configurations instead of packaging them into hydra-cluster (smoke) test suite #1156
  • Reviewing PRs and ADRs from the community (SundaeSwap) #1118#1157
  • Hydra tally experiment (Cardano Foundation) deployed to mainnet

What are the goals of next week​

  • Tackle reported bugs
  • Shepherd contributed off-line mode PR to the main codeline
  • Improve chain observation tool to include more data and refactor existing code towards more stateless observation
  • Start work on incremental decommits