High level overview​

This week, the Mithril team continued implementing the mock DMQ node to support end-to-end testing of decentralized signature diffusion. They also worked on resolving a circular dependency issue with the operational certificate in the KES signer module and completed the upgrade to Cardano node v.10.5. Additionally, the team continued collaborating with the innovation team on prototyping a SNARK proving circuit for Mithril certificates.

Finally, they worked on prototyping a Mithril/Cardano bundle in a Docker image and made progress refactoring the STM cryptographic library.

Low level overview​

• Completed the issue Remove Operational Certificate circular dependency in KES signature #2668
• Completed the issue Upgrade to Cardano 10.5 #2623
• Completed the issue Remove features test_tools and full from mithril-client #2662
• Worked on the issue Implement a fake DMQ node with Mithril relay #2627
• Worked on the issue Simple Aggregation Halo2 - Prototype #2526
• Worked on the issue Update the DMQ message structure #2670
• Worked on the issue Prototype Mithril/Cardano bundle in Docker image #2616
• Worked on the issue Enhance STM library readability #2568

Overview of sprint 94​

Mithril​

We implemented node-to-node mini-protocols for dmq-node, see pr#5183.

The PR with node-to-client mini-protocols for dmq-node (pr#5173) is expected to be merged soon after addressing review comments.

We started working on verification of mithril signatures in the dmq-node, see issue#5175 and issue#5176.

Cardano-Node 10.6​

We also contributed configuration/tracing changes to cardano-node for its 10.6 release. See issue#6304.

TLDR​

We want to simplify user experience of cardano-node for Genesis and Praos modes: the network topology file contains bootstrap peers and genesis snapshot file location, which are only needed in one of the modes. In some cases, parsing shouldn't error (as it does now), but just emit a log message of the right severity. All the corner cases are described in the issue.

Tx-Submission​

The new tx-submission decision logic was merged, see issue#3311. The new tx-submission logic was benchmarked in the ioe performance cluster. Additional work is required to analyse its performance bottlenecks.

High level summary​

Over the past couple of weeks, the team continued working on LSM and KES agent integration, as well as Peras implementation. On the Leios prototyping front, the team is currently drafting a section in the Leios CIP focused on the new mini-protocols.

Two small improvements to Genesis tracing and metrics were also introduced: #6306 and #1628.

High-level summary​

The team has been working hard on a collection of fixes and user-requested features, while also continuing to support the Midnight Glacier Drop. Perhaps most interestingly we have added the ability to bring in partial amount when performing a commit. We continue to work on important improvements and user requests, we will start to investigate the partial fanout feature we've wanted to work on for a while, and continue to support the Glacier Drop!

What did the team achieve?​

• Allow partial Ada commits via blueprint tx and /commit API #2140
• Ported all the changes from 0.22.4 to master
• Support the integration of Hydra and the Glacier Drop
• Successfully presented Hydra Doom at RareEvo
• Rename --script-info to --hydra-script-catalogue #2190
• Fixed on CI for Mac #2139
• Improve API by using a timeout mechanism to return the result of HTTP actions #1911
• Initial version off a log viewer #2047
• Investigate implementing partial fanout

What's next?​

• Allow partial commits for specified tokens #2180
• Resolve the TUI being out of sync due to event-log rotation #2156
• Add a grafana-based monitoring example for running a Hydra node #2161
• Write a tutorial on committing a script UTxO into a Head #1653
• Start work on a HTLC between two Hydra Heads #2080
• Enable recovering a deposit when the head is closed #1812
• Prepare 0.23 release
• CI fixes #2191
• Investigate user issues #2113, #2144

High level summary​

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

Some notable recent changes, updates or improvements include:

• With the exception of a few canary machines still running the legacy cardano-node tracing system, the majority of IOE playground and mainnet cardano-node machines are now running the new tracing system.

• Adawallet received a feature upgrade to sign messages, enabling it to complete glacier drop claims for adawallet accounts. The cardano-airgap image was updated to include this capability.

Repository Work -- Merged​

Adawallet​

• Bumps to node 10.5.1 for cardano-cli 10.11.0.0, adds cardano-signer v1.29.0 to the devShell, adds a yarn devShell, improves the cardano-hw-cli package by switching to default nodejs pkg and greatly simplifies the build. adawallet-pr-22

• Add an adawallet sign-msg feature which signs with either payment or stake key, enabling glacier drop claims on adawallet accounts. Cleans up some more legacy cardano-hw-cli packaging and adds back bash auto-completion. adawallet-pr-23

Cardano-airgap​

• Updates adawallet for sign-msg support for glacier drop and adds cardano-signer and misc support packages and services to the devShell and iso. cardano-airgap-pr-6

Cardano-mainnet​

• This PR primarily upgrades all machines to the cardano-node new tracing system. It provides alert, dashboard and nix module upgrades for compatibility with the new tracing system. This PR includes improvements from cardano-parts release v2025-08-05. Additional details can be found in the PR description. cardano-mainnet-pr-38

Cardano-node​

• Adds the snapshot-converter binary to the nix overlay and the node OCI container. Adds documentation on how to use the snapshot-converter within the image for changing ledger state type. cardano-node-pr-6299

Cardano-parts​

• This cardano-parts release changes the default tracing system from legacy to the new cardano-node tracing system for deployed machines. See the release notes for details. cardano-parts-release-v2025-08-05

• Updates cardano-signer to v1.29.0 which allows for Byron era address claims for Midnight Glacier drop. Bumps mithril unstable and adds some flakeModule cluster options for more service granularity. cardano-parts-release-v2025-08-14

Cardano-playground​

• This PR primarily upgrades all playground testnet machines with a few canary exceptions to the cardano-node new tracing system. It provides alert, dashboard and nix module upgrades for compatibility with the new tracing system. This PR includes improvements from cardano-parts release v2025-08-05. Additional details can be found in the PR description. cardano-playground-pr-45

Cardano-signer (nix packaged)​

• The nix packaging for upstream cardano-signer was updated for release 1.29.0 for byron address glacier drop compatibility and a GHA for ci build testing was added. cardano-signer-pr-2

Repository Work In Progress -- PRs and Branches​

• Cardano-node: https://github.com/IntersectMBO/cardano-node/pull/6300
• Iohk-nix: https://github.com/input-output-hk/iohk-nix/pull/602