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109 posts tagged with "hydra"

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· 2 min read
Sebastian Nagel

High-level summary​

This week, the Hydra team has worked on completing to "Validate coordinated head protocol against formal model", this is a huge step to verify the implementation is secure. They also worked on implementing ADR21 related to bounded tx validity which is now under review. HydraPay project, from Obsidian Systems, is coming to an end of the first phase at least, so team did a review and submitted couple of issues they found in the process. The team had a meeting with the Director of CyberSecurity - topic was the RFP that is currently in flight that should scope the work of future auditors. Also, the team completed the hydra-tutorial review created by our colleague Thomas Vellecoop from the education team, and we are close to integrate it to our official site. From the development side, they have fixed a bug on the CI when running the benchmark jobs to calculate the cost of abortTx and a flaky spec which checks a plutus merkle-tree is always balanced.

What did the team achieve this week​

  • Document model based testing #194 & #641
  • Got ADR21, reducing gaps between implementation and specification, under review.
  • Complete review on hydra-tutorial.
  • Complete first round of review on HydraPay work #634
  • Meeting with Director of CyberSecurity frio IOG to unblock "the RFP prepared for the external audit" #606
  • Remove vasil-dev and testnet from smoke-test because they were not working #630
  • Fix flaky plutus-merkle-tree test #642
  • Refactor NetworkSpec to improve legilibility.
  • Fix benchmark cost for abortTx #631
  • Adapt nix.conf to the recent hydra-ci nix cache migration.

What are the goals of next week​

  • Get ADR21 accepted & close tx validity gap in our implementation.
  • Integrate the hydra-tutorial.
  • Have a LaTeX write-up of the HeadV1 (Coordinated Hydra Head) spec.
  • Get Cicero (new CI) working.
  • Use reference inputs to reduce the cost of the commitTx.

· One min read
Sebastian Nagel

High-level summary​

This week, the Hydra team has worked on cleaning up several things in progress after last week's summit. They have extended their model-based testing (MBT) approach with transaction creation & observation #410, solved AcquirePointTooOld problems of the hydra-node with by changing the wallet initialization #439. Also, the Hydra researchers updated the security proofs of the Coordinated Hydra Head, which are bound to be included in the Hydra HeadV1 specification.

What did the team achieve this week​

  • Monthly review & report - will also be published on our website #644
  • Extended the model-based testing (MBT) with transaction creation/observation #410
  • Solve AcquirePointTooOld problems with new wallet initialization #439
  • Fixed our hydraw deployments (EC2 instances)
  • Created & discussed ADR21 within tx validity work
  • Received & discussed security proofs of Coordinated Hydra Head (requires more work)

What are the goals of next week​

  • Get ADR21 accepted & close tx validity gap in our implementation
  • Complete review & integrate the Hydra tutorial
  • Review latest hydra-pay work
  • Have a LaTeX write-up of the HeadV1 (Coordinated Hydra Head) spec
  • Get Cicero (new CI) working

· One min read
Sebastian Nagel

High-level summary​

This week, the Hydra team attended the Cardano Summit in Lausanne, where Sebastian gave a presentation about Hydra and the whole team connected with the Cardano Community. After the public event, th Hydra team also conducted a workshop, which provided room for a retrospective, various planning sessions and they hacked together on different ideas.

What did the team achieve this week​

What are the goals of next week​

  • Monthly report & review meeting
  • Tie up several loose ends / branches.
  • Resolve Tx validity discussions & PRs.
  • Review cicero PR & try it out.

· 2 min read
Sebastian Nagel

High-level summary​

This week, the Hydra team released version 0.8.1, which includes several fixes and a user-wished extension of the persistence introduced by 0.8.0 of replaying server outputs to make clients like the hydra-tui be aware of the latest hydra-node state. The team also worked on the specification and closing gaps in the on-chain scripts, collaborated with the education team on a Hydra tutorial and also renamed the repository from hydra-poc to hydra!

What did the team achieve this week​

  • Implemented replaying of server outputs to address #580
  • Released version 0.8.1 containing this and other fixes Release notes
  • Worked on the bounded tx validity as one of the on-chain script fixes, but couldn’t finish it just yet #615
  • Collaborated with the education team on a Hydra tutorial.
  • Discovered and discussed issues with the “seen ledger”.
  • Renamed the Hydra repository hydra-poc -> hydra

What are the goals of next week​

  • Create and discuss an ADR about handling tx validity correctly.
  • Attend the Cardano Summit in Lausanne. Hydra will be topic of one talk! Save the date+time: "Developing Hydra" on Day 2, Nov 21st, 13:50 CET
  • Have a team workshop / hackathon after the summit:
    • Retrospective
    • Roadmapping session
    • Hack on something complex or useful

· One min read
Sebastian Nagel

High-level summary​

This week, the Hydra team published together with Obsidian Systems a light paper on our "Hydra for Payments" project (Link). They have created a draft scope RFP for the external audit and worked with the internal audit team to clear up the specification. From the development side, they have fixed a bug with chain-following when using persistence and improved logs for better observability of hydra-node processes.

What did the team achieve this week​

  • Published Hydra for Payments light paper (Link)
  • Have a draft RFP ready for a first review internally
  • Answered the internal auditor’s questions
  • Fixed a bug with following the chain when starting with persistence (#599)
  • Minor improvements to logging for better observability (#598, #600)
  • Non-achievement: Needed to work around flaky TUI ci, follow-up issue if anyone wants to have a look (#590)

What are the goals of next week​

  • Implement event-sourced persistence #580
  • Close more gaps #452
  • Attend the Cardano Summit in Lausanne. Hydra will be topic of one talk! Save the date+time: "Developing Hydra" on Day 2, Nov 21st, 13:50 CET