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· One min read
Damian Nadales

High level summary

  • Worked on a Genesis fix for an edge case in chain selection when the node is just caught-up (#1505).
  • Worked on a Genesis fix to correctly disable ChainSync jumping when the node is caught-up (#1492).
  • Discussed next steps on testing nodes via Antithesis in cooperation with the Cardano Foundation, in particular bespoke tooling (see this Discord message).
  • Continued engaging with the Leios research team to help with open questions and decisions that the innovation team is currently handling.
  • Made significant progress on the validators for the CDDL specs we are adding for the Cardano Blueprints (#1422). We are able to test that some of our golden CBOR files conform to the spec. Work is ongoing to extend the tests for the remaining golden files.
  • Opened a PR to use an automatic formatter for ouroboros-consensus, which will help lower the barrier to entry for new contributors (#1500).

· One min read
Noon van der Silk

High-level summary

We continue working away on fixes for deposits/incremental commits, and some UX and documentation improvements that have come about as a result of working with the Glacier Drop operators. We continue working on Blockfrost integration, event log rotation, and more UX improvements.

What did the team achieve?

  • Update the hydra-explore to track 0.21 #45
  • Small updates to the tutorial around etcd #1991
  • Fixes to the documentation #1636, #1752, #1975
  • Embedded etcd into hydra-node to improve UX of running the node #1992
  • Fix "UX" bug when changing peers on a previously-configured hydra-node #1965
  • Reinstated Kupo support #1785 (pending merging the PR.)

What's next?

  • Finished new deposit check #1951
  • Work on a simple endpoint to check head status #1957
  • Continued work on a full Blockfrost chain layer #1305
  • Investigate event-log rotation #1581
  • Simplifty finding the hydra scripts #1441
  • Add a way to query the head status #1957
  • Continue to focus on supporting the Glacier drop

· 2 min read
Jean-Philippe Raynaud

High level overview

This week, the Mithril team advanced the DMQ node implementation by finalizing the delayer and retrier decorators, enabling support for multiple signature publishers in the signer. They also implemented the signature consumer and processor in the aggregator to handle incoming signatures continuously.

The team re-implemented the GCP file uploader using a more robust library and addressed the cleanup of unexpected immutable files downloaded in snapshot archives.

Finally, they improved Cardano node restoration tests to ensure reliable restarts and continued refactoring the STM cryptographic library for better clarity.

Low level overview

  • Completed the issue Implement delayer and retrier decorators of the signature publisher in signer #2461
  • Completed the issue Add warning in client when not downloading ancillary files #2459
  • Completed the issue Re-implement the GCPBackendUploader with cloud-storage crate in aggregator #2460
  • Worked on the issue Add a Cardano node startup check step in the manual client test workflow #2471
  • Worked on the issue Cleanup unexpected immutable files in archive in client #2429
  • Worked on the issue Implement a signature processor for DMQ node in aggregator #2470
  • Worked on the issue Rollout Cardano Database v2 feature #2409
  • Worked on the issue Signer fails to access Cardano node after it has rebooted #2426
  • Worked on the issue Re-organize STM library structure #2369
  • Worked on the issue Record signatures origin in the signature processor of aggregator #2478

· 2 min read
Ziyang Liu

High level summary

Over the past two weeks, we’ve been working on the Plutus section of the Cardano blueprint, adding documentation to make it easier for developers to implement alternative Plutus Core evaluators.

We’ve also continued improving the Plutus language itself, completing the costing and property-based testing for the modular exponentiation primitive, and thte costing for new built-in array primitives.

For case analysis on Bool, we’re currently evaluating different approaches to ensure we choose the most robust and forward-compatible solution.

On the formal methods side, we made further progress toward the initial release of the certifier. This includes integrating it with the Plinth compiler and exposing plutus-metatheory as a reusable library.

In our most recent Plutus working group meeting - which we've begun publishing publicly - we presented overviews and demos of both the certifier and the built-in arrays. Feel free to check it out.

Low level summary

Key Pull Requests Merged

Issues and Pull Requests In Progress

  • Allow casing on booleans
  • Review the Builtin Values CIP
  • Conformance tests for the modular exponentation primitive (in plutus-private)
  • Fix the certifier for two UPLC forceDelay tests (in plutus-private)
  • Write a landing page and a page about serialization/deserialization for the Cardano blueprint (in plutus-private)
  • Add MSM primitive to Plutus (in plutus-private)

· 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:

  • Cardano-node and cardano-cli pre-release versions are now set to 10.4.1 and 10.8.0.0, respectively, in cardano-parts release v2025-05-01.

  • In cardano-node, support for GHC 8.10 has been removed in master reducing CI eval times to < ~3 min. The next tagged pre-release or release after node 10.4.1 will support only GHC 9.6.

Repository Work -- Merged

Cardano-parts

Cardano-node

  • Auto ghcr latest tagging currently occurs on full releases. Promotion of pre-release to release, however, doesn't trigger a published event, and instead requires a manual workflow dispatch off the newly promoted release tag. This PR adds ghcr latest tagging to the manual workflow dispatch pre-release to release use case. cardano-node-pr-6200

  • Drops support for haskellNix ghc 8.10.x which also reduces eval time to ~3 min with the removal of 249 variant packages. cardano-node-pr-6206

  • Removes the eventlogged package as ghc >= 9.4 includes unconditional -eventlog support in RTS. cardano-node-pr-6208

Cardano-playground

  • Sets node pre-release to 10.4.1 and cardano-cli pre-release to 10.8.0.0 with cardano-parts release v2025-05-01. Updates and deploys cardano-book configuration for node pre-release 10.4.1. Adds preview1-test-a-1 machine, sops updates and secrets for test forging across legacy and new tracing. cardano-playground-pr-44

Repository Work In Progress -- PRs and Branches