Skip to main content

· One min read
Damian Nadales

High level summary​

This week the Consensus team made progress on two fronts: the question of survivable eclipse duration, which is part of our work supporting Genesis delivery, and how to improve the handling of blocks from the future. Regarding the UTxO-HD branch, we managed to run a node with legacy blocks, which is syncing with mainnet, up to including Alonzo. We also investigated a regression in mempool snapshotting, which was ultimately solved by a Ledger update, and will be fixed in the upcoming Node 8.6 release.

· One min read
Jean-Philippe Raynaud

High level overview​

This week, the Mithril team kept working on decentralizing the Mithril networks with the peer-to-peer (P2P) networking proof of concept. They progressed with the adaptation of the Mithril client as a library, and worked on its full WASM compatibility in a proof of concept. The team kept working on the deterministic computation of the transactions from the immutable files, and fixed some unreachability issue on the release-mainnet aggregator.

Finally, they implemented new Docker images that build the Mithril nodes on the 'devnet' faster and fixed some regressions in the Mithril client CLI.

Low level overview​

  • Worked on the issue P2P Networking - Proof of Concept #1300
  • Completed the issue Build mithril-common and mithril-client in WASM PoC #1284
  • Completed the issue Fix devnet Mithril Docker images [#1272](https://github.com/input-output-hk/mithril/issues/1272
  • Worked on the issue Light Wallet: Release mithril-client library #1311
  • Worked on the issue Compute deterministic Cardano UTxO set PoC #1283
  • Worked on the issue release-mainnet aggregator is unreachable #1310
  • Completed the issue Client regressions in snapshot list and download #1321

· 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 writing a paper on performance modelling

Details​

  • completing work on chain sync mini-protocol

  • outline for JLAMP journal paper submission

  • analysing timeouts

· One min read
Sebastian Nagel

High-level summary​

This week, the Hydra team fixed the gen-hydra-keys command to avoid overwriting existing keys, and resolved issues related to the rewritten hydra-tui. They also worked on a \"dirt road\" implementation for the \"Ignored init tx\" notification, improving the robustness of the system.

The team finalized preparations for the Cardano Summit presentation, including implementation of the hydra-poll example DApp.

If you happen to read this and attend the Summit in Dubai, make sure to check out our Masterclass about \"Developing Hydra + Mithril for Scaling Cardano\" on Friday, November 3 at 14:00-15:30 local time in the \"Al Dar\" room!

What did the team achieve this week​

  • Fix gen-hydra-keys command to not overwrite existing keys #1136
  • Fixed the rewritten hydra-tui#1113#1137
  • Finalized cardano summit preparation #1109
  • Implemented the hydra-poll example DApp link to repository
  • Dirt road implementation for \"Ignored init tx\" notification #529

What are the goals of next week​

  • Attend cardano summit and deliver presentation
  • Clarify / close user created issues
  • Build aarch64-darwin binaries in CI

· 2 min read
Marcin Szamotulski

High-level overview of sprint 47​

Bootstrap Peers​

We continued to review the process of bootstrap peers, see ouroboros-network#4555

CI / Tests​

We investigated our CI issues. We found a memory leak in typed-protocols function used for testing codecs which triggered out of memory manager (OOM) on some platforms (typed-protocols#43); we also found a bug in the connection manager which resulted in CI timeouts (see connection-manager-fix).

KeepAlive client​

We found two small issues with the keep-alive client, which were addressed by Karl Knutsson (Cardano Foundation), ouroboros-network#4689.

Galois​

We merged two large PRs prepared by Galois:

Cardano Network Service Assurance (CNSA)​

Galois made the following progress on CNSA:

  • a simple [InfuxDB] database backend has been added;
  • the documentation has been updated;
  • internal improvements to the code;
  • progress on a new "CSNA analysis" that provides, for each sampler node, the block download throughput in bytes over time.

New CHaP Release​

We cut a new release of ouroboros-netowrk packages to CHaP: chap#547

More details​

CI / Tests​

We improved the memory footprint of some of our tests by analysing a stream of IOSim traces without retaining them, see ouroboros-network#4696

As a safety measure, we introduced an upper bound for heap memory used by test artefacts in our nix tests. We use 200MB limit for all tests except for network-mux tests which use 350MB limit, see ouroboros-network#4702.

We refactored one of our tests to use ephemeral ports thus allowing it to run concurrently, see ouroboros-network#4702.

We merged ouroboros-network#4623 which fixes a bunch of test failures.

All of them were due to a bug in test logic rather than a bug in production code.

Release Process​

We updated our release process & associated scripts, see ouroboros-network#4705.