Consensus-layer Call 103

[djrtwo]

Consensus-layer Call 103 Agenda

prev: call 102

Meeting Date/Time: Thursday 2023/2/23 at 14:00 UTC
Meeting Duration: 1.5 hours

livestream

1. Capella
   • testnet updates
   • relayer/builder testing progress
   • mev-boost update and SSE subscriptions
   • beacon-apis release plan
2. Deneb
   • new release
   • EIP4844: Remove sending empty blobs sidecar responses consensus-specs#3242
3. Research, spec, etc
4. Open Discussion/Closing Remark

[metachris]

Happy to give an update about the mev-boost implementation & testing status re Capella.

Also would love to touch on SSE subscription to trigger block building (which includes withdrawals) - see also ethereum/beacon-APIs#244 (comment) (latest proposal by @michaelsproul)

[paulhauner]

Lighthouse has published a Capella-ready release: https://github.com/sigp/lighthouse/releases/tag/v3.5.0

This means that Capella is now in our stable branch and we're on a clean path towards Goerli and mainnet release. We have a handful of remaining tasks for Capella which we can easily accomplish in the current Goerli/mainnet time frames.

Notably, @michaelsproul has been maintaining an alpha version of his "tree states" upgrade to Lighthouse which represents the BeaconState as a data-sharing tree. That alpha will not be updated in time for Capella (but might be for Goerli/mainnet). Anyone using it shouldn't expect it to survive Capella. No one should be using it for production, anyway.

[rolfyone]

Also would love to touch on SSE subscription to trigger block building (which includes withdrawals) - see also ethereum/beacon-APIs#244 (comment) (latest proposal by @michaelsproul)

Re. #244, happy to progress it if there's a PR, probably not going to get to the beacon-api PR first at this point, though I have raised a teku issue for it. SSE subscriptions are possible from the teku perspective, if that's what's required. Endpoints would potentially be more reliable, you may miss things if a disconnect happens at a bad time.

Re. #301, potentially makes more sense to me than SSE, but happy to look at both.

While on the topic of beacon-apis, it's becoming a blocker that the 1.3 spec is not yet released. beacon-apis was waiting for 1.3 to be versioned so we could release the Capella api version, but now 1.3 seems to be leaking a lot of Deneb configuration, it's starting to look like we won't be making a clean version of the beacon-apis before merging all the Deneb endpoints into the spec.

If we could get guidance on the plan for the spec, whether 1.3 is going to be wrapped up for Capella, or if it's continuing on? Otherwise at the moment the beacon-apis is basically stalled.

[benjaminion]

Quick call notes.

[metachris]

Documentation of MEV-Boost changes for Capella: https://flashbots.notion.site/MEV-Boost-Capella-Upgrades-00cea01704794f6eb4f792c55b69c441