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· 2 min read
John Lotoski

High level summary​

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

Some notable recent changes, updates or improvements include:

  • Nixpkgs has been updated to 24.11 across all environments

  • Nix has been updated to 2.25.3 across all environments

  • TCP tuning was applied on one relay per pool group across all environments to minimize round-tripping across long distances.

  • This is the last SRE update for 2024. Hello 2025!

Repository Work​

Cardano-parts​

  • Nixpkgs has been updated to 24.11 and nix to 2.25.3. NixosModules and template just recipes with breaking changes from those updates were fixed. A nix jobs GHA CI test was added to verify environment spin up procedure. Template scripts were updated for compatibility with latest cardano-node protocol version and recent cardano-cli breaking changes. More details are available in the release notes: cardano-parts-release-v2024-12-19

Cardano-playground​

  • Nixpkgs has been updated to 24.11 and nix to 2.25.3 and all machines deployed along with breaking changes fixes. A fund-transfer recipe was added along with other miscellaneous improvements. More detail is available in the PR description: cardano-playground-pull-38

Cardano-mainnet​

  • Nixpkgs has been updated to 24.11 and nix to 2.25.3 and all machines deployed along with breaking changes fixes. Bootstrap scaling servers were disabled and block producer auto scheduled restarts were stopped. TCP transmission optimization for long distances was applied to one relay per pool group. More detail is available in the PR description: cardano-mainnet-pull-28

Iohk-nix​

· 2 min read
Jordan Millar

2024-12-04T00:00:00Z - 2024-12-18T00:00:00Z

High level summary​

Feature Enhancements​

  • New Query Command: Implemented the "query proposals" command to provide users with easy access to proposal information in the Conway era
  • Enhanced Transaction Modification: Added comprehensive transaction modification capabilities with new modX functions for various fields of TxBodyContent up to the Babbage era

Code Quality Improvements​

  • Better Code Structure: Moved Byron-specific code to its own file, making the codebase more maintainable
  • Query Implementation Simplification: Reduced code complexity in Query.hs
  • Documentation Improvements: Added explanatory comments for configurations like why drepDelegs can be left empty in testnet data

Documentation and Governance​

  • OSC Alignment: Updated documentation to align with the Open Source Committee governance policies

cardano-cli​

cardano-api​

cardano-node​

  • None

cardano-testnet​

  • None

docs​

CI & project maintenance​

  • None

· One min read
Noon van der Silk

High-level summary​

Entering into December, with some colleagues on holidays, we are finalising our outstanding work, and continuing to support the Hydra Doom tournament. We remain focused on finishing incremental commits, and getting multiple-version support into the explorer.

What did the team achieve?​

  • Final reviews on incremental commits #199
  • Make it easier to publish docker images for branches #1756
  • Progress on custom ledger experiment #1742
  • Progress on Hydra explorer supporting multiple versions #1282

What's next?​

  • Merge incremental commits #199
  • Hydra explorer supporting multiple versions #1282
  • Finish custom ledger experiment #1742
  • Plan the 0.20.0 release
  • Continue support Hydra Doom

· One min read
Damian Nadales

High level summary​

  • Well-Typed held a new lsm-trees milestone presentation, where they showed the progress in two important features:
    • Snapshots (for persisting ledger snapshots)
    • Table union (for storing more parts of the ledger state on disk)
  • Finished the UTXO-HD code review work. Since this feature could have a performance impact, we need to run a new set of system-level benchmarks before we can merge it. The next steps are detailed in this comment.
  • Submitted a request to the Technical Steering Committee on how the node should handle low apparent participation.
  • Added support for computing and checking CRCs of ledger state snapshots, which increases robustness when loading this data from disk (#1319).

· One min read
Jean-Philippe Raynaud

High level overview​

This week, the Mithril team continued implementing the incremental certification of the Cardano database: they kept working on creating and synchronizing the artifacts. The team finished exploring solutions for signer registration in networks with multiple aggregators and updated the About Mithril section of the website. They also progressed with developing a cache for certificate verification in the WASM client.

Finally, the team accelerated the creation of signer fixtures in the tests and added execution rights to the binaries pre-built in the CI.

Low level overview​

  • Completed the issue Explore Signer Registration Solutions #2029
  • Completed the issue Reorganize the About Mithril section in the documentation website #2154
  • Completed the issue Feat: add execute rights on pre-built binaries in CI #2156
  • Completed the issue Accelerate signer fixtures creation in tests with pre-computation #2153
  • Worked on the issue Implement artifacts builder for Incremental Cardano DB #2151
  • Worked on the issue Release 2450 distribution #2124
  • Worked on the issue Handle cache for certificate verification in WASM client #1484
  • Worked on the issue Activate Pythagoras Mithril era #2034