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· One min read
Jean-Philippe Raynaud

High level overview​

This week, the Mithril team focused on integrating the Haskell DMQ node with Mithril nodes. They also finished the preparatory phase and started the first phase of decentralizing configuration parameters. Work continued on supporting multiple proof systems and developing an implementation plan for Mithril succinct proofs using a SNARK-friendly version of the STM cryptographic library.

Finally, the team replaced vulnerable Rust dependencies for YAML parsing and made progress refactoring the STM cryptographic library.

Low level overview​

  • Worked on the issue Support multiple aggregation proof systems in STM library #2680
  • Worked on the issue Decentralization of configuration parameters - Phase 1 #2692
  • Worked on the issue Integrate the Haskell DMQ node #2674
  • Worked on the issue Enhance STM library readability #2568
  • Worked on the issue Replace serde_yml unmaintained crate #2700

· One min read
Noon van der Silk

What did the team achieve?​

  • Enable recovering a deposit when the head is closed #1812
  • Progress on staying up to date with the chain even when there's no head logic events #2206
  • Improved Blockfrost error reporting, in leight of user-reported issue #2194
  • Configurable wait-times for blockfrost #2058
  • Partial commits for tokens as well #2180
  • Fixed TUI not listing UTxO's that are committed #2201
  • Permissive reading of the statefile if it contains bad JSON #2255

What's next?​

  • Best practice documentation for committing a script UTxO #1906
  • Start working on partial fanout #1468
  • Continue working on HTLC example in Hydra #2080
  • Continue working on chain following speedups #2206
  • Showcase running Hydra on a Rasberry Pi #2083
  • Release 0.23
  • Continue supporting the Glacier Drop

· 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:

  • A substantial amount of effort was placed into the Hydra CI build system during this biweekly period to investigate the root cause of aborted builds due to both logged invalid store paths and logged missing nar cache files. Nushell scripts were written to examine and repair specific closures as well as to walk all nix cache objects and proactively resolve any dangling narinfo files, effectively resolving the aborted builds. Script repair operations were parallelized to speed up the walk rate across the large object count bucket. The root cause was a cache truncation operation which purged a small percentage of objects filtered by oldest age and non-uniformly deleted narinfo and nar objects which needed to remain paired due to self-references. A more intelligent GC approach will be used in the future.

Repository Work -- Merged​

Blockperf​

  • Fixes a new tracing system blockperf implementation error for trace detail level. blockperf-pr-33

Capkgs​

  • Re-adds regular hydraJob builds in addition to fetch-closure only builds to ensure the full jobset can be rebuilt from source. capkgs-commit-range

Cardano-airgap​

  • Adds more boot options for better video driver support, including nouveau nomodeset fallback and open and closed Nvidia drivers. The dconf config file was updated to use the nixos modules declaration. Logout, shutdown, restart and similar gnome operations were fixed. Additional helper packages were added. See the PR header for details. cardano-airgap-pr-9

Devx-ci​

  • Adds ci10, a x86_64-linux builder, to be repurposed later for Equinix metal migration. Sets narinfo-cache-positive-ttl back to default value, sets the default user nofile limit to 4096 from default of 1024 to avoid occasional nofile failures. Rekeys required group secrets to include the new machine, adds ci7, ci8 to the r2 tunnel. Adds a github-hydra-bridge-restarter service to detect when the bridge token has expired and auto-rotate within one minute of expiration. devx-ci-pr-135

Repository Work In Progress -- PRs and Branches​

· 2 min read
Alexey Kuleshevich

High level summary​

This period Ledger team has implemented an improvement to withdrawals predicate failure reporting, that will become available with next intra-era hardfork. We've also experimented with a potential representation in Haskell for transaction levels relateed to CIP-118: sub-transactions vs top level transactions. Besides that we did some more code cleanup and made further improvements to the test suite.

Aside from development work there was Ledger team presence at the Node Diversity workshop, which included relevant people from all of the alternative Node implementations that are currently under development.

Low level summary​

Features​

  • PR-5281 - Added FromJSON instance for PParamUpdates
  • PR-5291 - Move withdrawals to LEDGER PV 11 onwards
  • PR-5297 - Remove UMap

Testing​

  • PR-5195 - Refactor some parts of cardano-ledger-conformance to prepare for Dijkstra
  • PR-5288 - Update fls and fix conformance build
  • PR-5289 - Add Dijkstra CddlSpec
  • PR-5285 - Added a new test Plutus script
  • PR-5280 - Small refactoring of impSatisfyNativeScript to avoid duplication
  • PR-5293 - Enable epoch boundary hook in conformance
  • PR-5303 - Migrate constrained-generators docs to its own repo

Infrastructure and releasing​

  • PR-5286 - Post release process changelog version bumps
  • PR-5283 - Use the "union" merge driver for changelogs
  • PR-5290 - Update version and CHANGELOG of cardano-ledger-core
  • PR-5287 - Fixup random 1.3 compatibility
  • PR-5307 - Fix CHANGELOG files

· 2 min read
Jean-Philippe Raynaud

High level overview​

This week, the Mithril team released the 2537.0 distribution, which provides support for Cardano node v.10.5.1, stabilizes commands of the client CLI, provides support for ARM pre-built binaries, and includes various bug fixes and improvements.

The team also completed updating the CIP of the DMQ protocol and its implementation in Pallas and Mithril nodes, introducing changes to the message structure and the n2c local notification mini-protocol. They continued working on the preparatory phase of decentralizing configuration parameters and on supporting multiple proof systems in the STM library.

Finally, a part of the team attended the Node Diversity Workshop #2 event in Toulouse, France, and began testing the integration of the Haskell DMQ node with the Mithril nodes.

Low level overview​

  • Released the new distribution 2537.0
  • Published a dev blog post about the Distribution 2537 availability
  • Published a dev blog post about the Linux ARM binaries availability
  • Completed the issue Release 2537 distribution #2625
  • Completed the issue Update the DMQ message structure #2670
  • Completed the issue Update the n2c Local Message Notification mini-protocol in DMQ #2673
  • Completed the issue Decentralization of configuration parameters - Phase 0 #2691
  • Worked on the issue Support multiple aggregation proof systems in STM library #2680
  • Worked on the issue Decentralization of configuration parameters - Phase 1 #2692
  • Worked on the issue Integrate the Haskell DMQ node #2674
  • Worked on the issue Enhance STM library readability #2568