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· One min read
Damian Nadales

High level summary​

  • Completed the rebase of the production libraries for UTXO-HD on 8.9, both in ouroboros-consensus, cardano-api and cardano-node.
  • Measured sync and replay times and memory in UTXO-HD. The latest result are reported here.
  • Bugfixed the snapshot interval.
  • Added an extra case to isIncorrectClaimedFlag for Babbage and Conway eras.
  • Added a db-analyser analysis to get the UTXO size per slot. The result of the analysis is illustrated here.
  • Started integration work for Node release 8.10.
  • Reviewed the Genesis pull-requests submitted by Tweag. They are pending a final round of review.
  • Helped the current release engineer prepare the 8.9 release candidate.
  • The Consensus Team has also been helping troubleshoot known issues with 8.9 (eg snapshots causing missed leadership schedules, unexpected snapshot interval, integration tests, etc).

· 2 min read
Jean-Philippe Raynaud

High level overview​

This week, the Mithril team kept implementing the data type for certifying Cardano transactions within Mithril networks: they worked on adapting the Mithril explorer to support Cardano transaction verification, started implementing a more efficient transaction signing scheme, stabilized the type names in the API, and kept investigating a bug that prevents the signature of some Conway era transactions. Additionally, they have completed the first version of the Prometheus monitoring endpoint for the signer.

Finally, the team fixed a bug occuring in the publication of the npm packages of the client, enhanced the HTTP tests of the aggregator, and kept working on the KES period computation in the Pallas chain observer.

Low level overview​

  • Completed the issue Expose Prometheus metrics for Mithril signer #1096
  • Completed the issue Make HTTP server tests more robust #1524
  • Completed the issue Stabilize namings in Cardano Transactions API #1535
  • Completed the issue Reorganize crates in the repository #1528
  • Worked on the issue Implement Cardano Transactions in explorer #1497
  • Worked on the issue Implement a Block Range Merkle Tree for Cardano Transactions #1533
  • Worked on the issue Output CLIs logs to stderr #1515
  • Worked on the issue npm publish fails on latest when next exists #1531
  • Worked on the issue Cardano transactions are not all signed in testing-sanchonet #1537
  • Worked on the issue Enhance Mithril/Cardano node communication #1315
  • Worked on the issue P2P threat modeling and risk analysis #1350

· 2 min read
Marcin Szamotulski

High-level overview of sprint 56​

Cardano-Node, Cardano-API, Cardano-CLI​

In the last sprint, the network team was designated to take the Release Engineering Role, as the coming release contains mostly network advances. Armando Santos has been making progress on it. The following packages were published to CHaP:

and other ouroboros-network packages with minor changes. The following packages were also published:

The work on cardano-node is in progress, see cardano-node#5485

We would like to thank Karl Knutsson (CF) for helping us to test the upcoming cardano-node release.

Ouroboros-Network​

We continued working on tx-submission, ouroboros-network#3311

We started to execute an idea to put all configuration values used by the diffusion layer Ouroboros.Network.Diffusion.Configuration module. Currently, default values are spread in different repositories (e.g. cardano-node, ouroboros-consensus). See ouroboros-network#4805.

We restored how syncing works in bootstrap mode to get the same performance characteristics, see ouroboros-network#4809, ouroboros-network#4810.

We started working on Outbound-Governor Genesis mode, see ouroboros-network#4813.

Ouroboros-Consensus​

We requested to modify how bulk-sync mode works to make it use the same mechanism that the newly added LedgerStateJudgement. See ouroboros-consensus#958.

Low-level summary​

We also addressed a minor issue regarding tracing LedgerStateJudgement changes, see ouroboros-network#4816.

· 2 min read
Sebastian Nagel

High-level Summary​

This week the Hydra team, in addition to the usual maintenance and bug fixing, has been working on the preparation for the switch to Conway making the codebase less babbage specific. The team also conducted the monthly review meeting and published the monthly report on a new website (to keep those reports separate of main repository). They also added a basic UI to the Hydra explorer, switched to aggregating sanchonet data and also fixed the smoke tests to work on sanchonet. Finally, they continued progress the off-chain incremental commit protocol changes.

What did the team achieve this week

What are the goals of next week​

  • Complete preparation for #1178 to switch to Conway (by "flipping" a switch)
  • Complete off-chain incremental commit protocol changes #199 (and focus on the on-chain part after).
  • Re-align with SundaeLabs on EventSource and EventSink refactoring.

· 2 min read
John Lotoski

High level summary​

The SRE team continues work on cardano environment improvements and general environment maintenance.

Some notable recent changes, updates or improvements include:

  • Cardano-node 8.8.1-pre is now deployed to sanchonet, two-thirds of preprod, one-third of preview and also voltaire private chain networks.

  • Catalyst Voltaire private chain was respun and an updated db-sync and govtool backend deployed after hard fork to Conway era.

  • IOG sanchonet pool block producers are now also signing mithril certificates.

  • A mithril-signer-verifier service now runs on all IOG SRE mithril signers and generates alerts if no recent mithril certificates have been signed.

  • All cardano-parts mithril clients, whether via nixosConfiguration, process-compose jobs or the nix cardano-node entrypoint, will now automatically verify that a trusted IOG pool has signed a mithril certificate prior to using the associated mithril state. If no trusted IOG pool has signed a recent mithril certificate, mithril state usage with be skipped and a classic sync from genesis to tip will be performed.

  • A significant amount of effort was applied towards the upcoming cardano-node 8.9.x-pre release in order to align nixos service module code between cardano-node nixos services, iohk-nix topology generation, cardano-ops legacy code, and cardano-parts module compatibility.

Lower level summary​

Work in progress​