Cardano Development Report Puts Hydra 2.2.0 and Mithril Infrastructure at the Center of June Update

Essential Cardano published its weekly development report for June 19, with Hydra 2.2.0 and Mithril infrastructure work forming the main technical focus of the update. The report also covered internal testing for Lace Carbon, progress around recursive SNARK aggregation and the next phase of the Constitutional Committee election process.

Hydra 2.2.0 Adds New Tools for Cardano Scaling Tests

The scaling section of the report highlighted the release of Hydra 2.2.0, the latest version of Cardano’s layer 2 scaling protocol. Hydra is built to support faster transaction processing through off chain heads that settle back to Cardano’s base layer.

The release includes partial fanout implementation and a revamped hydra tui. It also expands the benchmark suite used to test Hydra performance, adding real world TPS metrics, a Mixed UTXO generator and a new matrix sub command that can sweep cluster sizes and UTXO shapes.

The report said the Hydra team also unified on chain membership checks around the BLS accumulator. That change reduces the snapshot signing tuple and removes redundant hashing. The team also started optimizing snapshot processing so script heavy heads can avoid re evaluating Plutus scripts that have already been validated.

These updates give developers more detailed ways to test Hydra behavior under different workloads. Instead of relying only on simplified transaction scenarios, teams can now measure performance across varied UTXO structures, cluster sizes and transaction patterns.

Mithril Updates Improve Snapshot Workflows and Proof Infrastructure

The core technology section focused on Mithril integration and ledger state snapshot handling. Nodes running on an on disk backend can now export snapshots in a portable in memory format, allowing Mithril signers to obtain the agreed format directly from the node.

The consensus team also implemented a new snapshot policy that makes ledger state snapshot timing more predictable through agreed cadence values. The report said db analyser was updated so analysis can begin from a snapshot at a specified slot, which avoids replaying the full chain from genesis. A rare snapshot error affecting epoch boundary blocks was also fixed.

Mithril development continued in the scaling section. The team completed preparation of prover input and SNARK proof verification for recursive SNARK aggregation primitives. It also adapted the certificate chain to support recursive SNARKs and continued work on creating the SNARK proof with the circuit, wiring the proof into aggregate signatures and updating the Midnight ZK library audit status for SNARK.

The report also mentioned continued work on shipping the Mithril signer node binary in the Cardano node bundle. Together, these changes place Mithril work across node level snapshot handling, proof aggregation and infrastructure packaging.

Lace Carbon Testing and Governance Work Continue Alongside Core Development

The wallet and services section said Lace Carbon has entered internal testing. Built on the foundations of Lace 2.0, Lace Carbon is described as the next evolution of the Lace wallet experience, with a focus on a faster and more intuitive user journey.

Internal teams are now testing the wallet and providing feedback before a future opt in release. The report did not announce a public release date, but said more details are expected in the coming weeks.

The Voltaire section focused on the Constitutional Committee election process. Candidate registration closes on June 21 at 21:45 UTC. The report said five candidates had registered for four available seats, making the election competitive after the previous week had shown the same number of candidates as open seats.

After registration closes, DRep voting is scheduled to begin at the epoch boundary on June 23 and run through July 23. The election uses stake weighted voting, with each DRep able to vote for up to four candidates. The four candidates with the highest voting power at the close of voting are expected to form the election outcome, which will support an on chain Update Committee governance action before current terms expire in September.

The June 19 report places Cardano’s development activity across several active tracks, but the strongest technical concentration is in scaling and infrastructure work. Hydra 2.2.0 adds new benchmark and processing improvements for layer 2 testing, while Mithril work continues across snapshot exports, predictable ledger state handling, recursive SNARK support and signer integration inside the Cardano node bundle.