EPF Dev Update #14

Project links

• Project: EIP-4844 Consensus Client
• Design: Builder API for Blobs

Summary for week 15 (2023/2/6-2023/2/13)

• Lighthouse backfill sycn rate-limiting (lighthouse#3936): This week I'm focusing on wrapping up the work on this, mostly addressing review comments and testing. Hopefully this change will land soon! This change will reduce the CPU load for users setting up a new Lighthouse node, by throttling the backfill rate and is configurable if user chooses not to throttle. For background on this, please see my previous update.
• Builder spec update for Capella finally merged in (builder-specs#60)!
• EIP-4844 Builder updates: there are a couple of open PRs that I need to get back to due to recent changes in spec. I had a catch up with @realbigsean earlir this week on the changes related to decoupled blobs & blocks, my plan for the next couple of days:
  • Update the diagrams on the builder update design document to reflect the changes
  • Outstanding PRs / work that will be impacted by this change:
    • Add and update types for EIP-4844/Deneb builder-specs#61
    • Builder updates for Blobs (EIP-4844) lighthouse#3808
    • Add Deneb (EIP-4844) types and presets ralexstokes/ethereum-consensus#170
    • Add support for EIP-4844 types in mev-rs (WIP)
  • Add getBlobsSidecar endpoint beacon-APIs#286: spec PR was brought up in the EIP-4844 implementers call #14. Most clients have started implementing this, I will follow up on this one and hopefully finalise the spec soon!
  • Potentially pick up the work on Blob Signing API in Lighthouse. Issue here: https://github.com/ethereum/beacon-APIs/issues/300

WIP Tasks

Backfill sync (PR)

• measure batch processing time
• (WIP) address review feedback
• measure batch processing time with CPU limiting (docker)
• increase batch per slot

EIP-4844

• update 4844 builder flow
  • decoupling (spec draft)
  • blinded blob flow (update diagram)
• update builder-spec to support 4844
• update ethereum-consensus & mev-rs to support 4844
• update lighthouse 4844 builder flow
• beacon-APIs: download blob (PR)
• update lighthouse download blob API

Other potential tasks

• Update beacon-api-client to support 4844
• Blob Signing API in Lighthouse issue

Meeting recordings

• EIP-4844 call
• EPF office hour call /w @Mario Vega and @Fredrik
• EPF office hour call with @ralexstokes and @barnabé

Readings

• Edelweiss Interop Recap
  
• Decoupled blobs by @arnetheduck
• Blob Pool by @karalabe