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· 3 min read
Marcin Szamotulski

High-level overview of sprint 60​

Edited on 8th of May: new EGK counters will be included in `cardano-node-8.9.3`, added links to `cardano-node-8.9.3` PR and `ouroboros-network-0.15` release.

Peer-Sharing Improvements​

We continued working on improving peer sharing. As part of this work light peer sharing (e.g. including inbound peers to the known set of outbound governor), was restructured. Now, sending more peers than what was requested by the peer-sharing client is a protocol error, and the connection will be terminated; This hasn't been a resource attack vector since we always limited the number of peers taken by the outbound-governor and the number of peers has always been limited by the size of the mux ingress queue reserved for peer-sharing mini-protocol. These changes will be released in cardano-node-8.9.3. See ouroboros-network#4868

We also merged the work on outbound governor counters, which initially started as just an extension for peer-sharing counters but turned into a larger refactorisation. We announced it in the previous report. These changes will be included in 8.9.3. See ouroboros-network#4845, ouroboros-network#4861.

Light peer sharing (inbound peers) refactorisation allowed us to refactor the inbound governor loop: we restructured it so that the internal state is kept pure (and thus not shared with other threads), while the public part is computed incrementally (with good amortised costs and thus leading to good performance) and exposed to other components (e.g. the outbound-governor), see ouroboros-network#4871 (which is built on top of ouroboros-network#4868).

The PR [cardano-nod#5831] integrates ouroboros-network-0.15 with cardano-node-8.9.x branch. All included PRs / issues in ouroboros-network-0.15 are listed here.

Genesis​

We implemented the API needed by the consensus layer for Genesis; see ouroboros-network#4815, ouroboros-network#4846.

We continued working on outbound governor changes to support Genesis:

Bootstrap Peers​

Karl Knutsson ([CF]) found and fixed some problems related to big-ledger and public root peers. Here's an excerpt from the changelog file:

  • updated the big-ledger retry state in case of an exception;
  • reset public root retry state when transitioning between LedgerStateJudgements;
  • reduced public root retry timer;
  • don't classify a config file with public-root/bootstrap-peers IP addresses only as a DNS error. See ouroboros-network#4867.

Churn​

We merged a refactorisation which synchronises churn with the outbound governor, see ouroboros-network#4617.

Minor Improvements​

A few other minor improvements were merged:

Testing​

We added quickcheck-monoids package and also submitted an upstream patch to QuickCheck to include a version of the standard All / Any monoids, which are helpful when writing more complex properties. We will use quickcheck-monoids until the upstream PR will be released. It will be available from CHaP. See quickcheck#397.

· One min read
Sebastian Nagel

High-level summary​

This week, the Hydra team has been working on refactoring and detecting network protocol version mismatches. They have also merged the /commit endpoint changes including a follow-up fix about fee calculation. Besides this, they applied minor workflow fixes by adding docker images to nix checks and disabling mithril integration testing on preview (until mithril 2418 is released).

What did the team achieve this week​

  • Refactor connectivity and detect network protocol version mismatches #1381
  • Merged and completed #1350, including a follow-up fix about fee calculation
  • Add docker images to nix checks
  • Disable mithril-client testing on Preview

What are the goals of next week​

  • Restructure documentation including a how to about streaming plugins #1325
  • Add arm64 docker images as requested in #1404
  • Release 0.17.0

· One min read
Damian Nadales

High level summary​

  • Reworked the argument for the different databases used in Consensus, in preparation for UTxO-HD (#1059).
  • Helped review the first Peras Innovation draft report.
  • Continued working on VRF restriction based on slot distance. The corresponding PR (#1047) went through its first round of reviews.
  • Provided support to the Networking team to review their work on querying big ledger peers (#1067).
  • Continued working on open-sourcing fs-api and fs-sim.
  • Performed other minor refactorings in the codebase (#1073 and #1070).

· 2 min read
Jean-Philippe Raynaud

High level overview​

This week, the Mithril team prepared a new pre-release distribution 2418.1-pre, which includes broader CPU support for pre-built binaries and a new memory allocator for the signer and aggregator nodes to prevent memory fragmentation. They also continued implementing the certification of Cardano transactions in Mithril networks and worked on scaling the signature and proof generation for mainnet by leveraging the compression of the transaction Merkle tree using sub-Merkle trees based on transaction block ranges during signature and proving. Additionally, they implemented a stream mechanism for importing transactions into the signer and aggregator stores.

Finally, the team started implementing a global Mithril networks configuration file and continued investigating some unexpected error logs occurring on the Cardano node when the signer and aggregator connect to the mini-protocols.

Low level overview​

  • Created a pre-release for the new distribution 2418.1-pre
  • Completed the issue Store Block Range Merkle roots in signer and aggregator databases #1633
  • Completed the issue Stream import of Cardano transactions #1646
  • Completed the issue Memory leak in Cardano transactions signature/proof #1629
  • Completed the issue Handle unparsed blocks in Cardano transactions parser #1567
  • Worked on the issue Use Block Range Merkle roots to sign Cardano transactions #1634
  • Worked on the issue Use Block Range Merkle roots to prove Cardano transactions #1635
  • Worked on the issue Use SQLite transactions when inserting Cardano Transactions and Block Range Roots #1656
  • Worked on the issue Add Mithril networks configurations in networks.json #1638
  • Worked on the issue ChainObserver supports retrieving the Chain Point of the tip of the chain #1589
  • Worked on the issue Add section for manual setup of squid in SPO guide #1610
  • Worked on the issue Mithril Signer Local Error Policy : Error 182 - MuxError #1632

· One min read
Carlos LopezDeLara

2024-04-16 - 2024-04-26

High level summary​

8.10.1-pre was released to SanchoNet.

The team continues focused on implementing tests for the Conway era on the cardano-node repository. This sprint the team made various improvements to CI pipelines on cardano-cli.

  • Cardano-cli: implemented build-estimate to facilitate automatic transaction balancing without access to a live node; and added minFeeRefScriptCostPerByte as an option to create-protocol-parameters-update command.

cardano-node​

cardano-cli​

cardano-api​

cardano-testnet​

docs​

CI & project maintenance​