All Core Devs - Testing (ACDT) #48 | Aug 11 2025

Protocol Calls & happenings
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Agenda

  • Fusaka updates
  • Gas limit testing updates

Meeting Time: Aug 11 2025, 14:00 UTC (60 minutes)

GitHub Issue

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Notes

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ACD Testing Call #48 - Aug 11, 2025 - Quick Notes

Facilitator: Parithosh Jayanthi

Fusaka Update

Parithosh shared updates:

  • Devnet-3 has been running for 10 days, with two non-finality experiments conducted last week.
  • Experiment 1: Took out full nodes → ~1 hour of non-finality before recovery in the following epoch.
  • Experiment 2: Subset of supernodes removed → ~half a day of non-finality, but finality regained within 20–30 minutes, showing rapid recovery.
  • Results analysis showed no major issues; bandwidth limits appear fine and overall network health is good.

Next step:

Test with a subset of nodes (especially supernodes) capped at 1–2 Mbps bandwidth to simulate unreliable supernode participation. This is planned for next week.

Private Mempool Update

  • Bharat shared that there’s a way to directly send transactions to builders, which is useful for private mempool testing.

Next step:

  • Pari will set up spam testing for the private mempool.
  • Once the force transition issue is resolved, Bharat will focus more on spamming tests.

More on Devnets

Devnet 3

Pari shared more updates:

  • A fork of Prysm with a hook feature (allows changes) has been live on the network for 2 hours with no issues reported.
  • Hooks can be extended for more scenarios — share your ideas here.

Devnet 4 Setup

  • Setup coordinated with Sunnyside Labs, with additional testing planned here.
  • Network is running fine; next BPO is scheduled in the next 2 hours to assess performance.
  • Grafana dashboard available for monitoring.
  • Nimbus encountered issues — Dustin is investigating, some details shared by Pari on the call.
  • Pari clarified to Pawan that Devnet 4 has no non-finality tests planned but could add them if needed.
  • Pawan suggested exploring client behavior under longer finality delays.

Next step:

  • Parithosh will arrange a smaller devnet at the end of Devnet 4.

Holesky Release & Client Timeline

Parithosh shared updates

  • Community feedback indicates no major issues with ad-hoc client releases for Holesky validators.
  • James He relayed Preston’s note: “Releasing to holesky off develop isn’t difficult, but it messes with normal flow for releases”.

Next step:

  • will be brought to the next ACD for further discussion.

Pari:

  • One EIP-related PR pending: ethereum/execution-apis#678 — comments welcome before merging.

Gas Limit Testing Updates

  • Progress can be tracked here: Syncoor Dashboard
  • Mario shared the plan of another benchmark release this week.
  • Further on updates, Mario shared that With the updated tool, the Nethermind team can pull the genesis, run benchmarks, and report results.
  • Plans to extend benchmarking with another release expected soon.

Glamsterdam Updates

BALs

  • No BALs devnet yet, though specs are ready and built on top of Fusaka.

Next Steps

  • Toni & Pari will coordinate on setting up a devnet, possibly using Kurtosis.
  • Further discussion planned for ACD on Thursday.

ePBS

  • Local testing is available via a local branch.
  • Ansgar: No strong value in combining ePBS, BALs, and repricing in the same devnet.

Next Steps

  • Pari invited feedback on preferred Fusaka devnet setup.
  • Justin Traglia: Plans to merge consensus-specs PR #4476 soon.

Sunnyside Labs Update

  • No major updates today; another report expected tomorrow.

On Gas repricing

  • Toni: Highlighted EIP-7904, EIP-7778, EIP-7981, and multidimensional gas EIPs for consideration.
  • Pari: Asked if there’s a Meta EIP for gas pricing.
  • Ansgar: Confirmed they can create one.
  • Pari: Said a Meta EIP would be more useful than referencing individual EIPs.

Consensus Issues Found with Fusaka

  • Marius raised consensus-related concerns for discussion.
  • Mario: For EIP-7883, an update will be included in the next EEST release.
  • Justin Traglia shared Related PR (in chat): ethereum/execution-spec-tests#1993
  • Reth: Issues explained by Dragan are now resolved.
  • Marius mentioned: Two issues found for ModExp gas cost, but they are unrelated.
  • Pari asked if test coverage is sufficient.
  • Mario: Extra coverage would be good; will prepare another devnet release for testing.
  • Related PR: ethereum/execution-spec-tests#2005.

EIP-7825 Discussion

pk910: Asked if the transaction gas limit should also apply to eth_call and which clients have implemented it. Suggested directly adding the limit for checking.

  • Marius(in chat): In Geth, the limit is configurable.
  • Pari: Agreed to leave it as is for now and revisit the discussion later.

PS: This quick note is based on my following the call live and documenting it simultaneously. If you notice any missing updates or corrections, please share them here.

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