All Core Devs - Testing (ACDT) #73, March 9, 2026

[danceratopz]

UTC Date & Time

March 09, 2026, 14:00 UTC

Agenda

Fusaka

blob-devnet-0

spec&config · dora · explorer · forkmon

• Engine API serialization bottleneck (Teku+Geth), SSZ engine API discussion: execution-apis#764, Eth R&D discussion.
• eth69 debugging resolved (was mainnet peers).

Glamsterdam

bal-devnet-2

spec&config · dora · forkmon

• Winding down, some known Besu/Nimbus issues.

bal-devnet-3

spec&config · not yet launched; explorers will be at *.bal-devnet-3.ethpandaops.io.

• Client readiness / EIP-8037 cross-client bug hunt, @qu0b go-ethereum#33972, besu#9994, nimbus-eth1#4036
  • Increased EIP-8037 coverage, @benaadams execution-specs#2426.
  • -> New EL test release @spencer-tb bal@v5.3.0.
    • New: Also includes all tests filled for Osaka (and use the new directory layout).
• When launch? > 2026-03-11?

epbs-devnet-0

spec&config · dora · explorer · forkmon

• Launch update, Prysm/LH/Lodestar running, sync challenges, prysm#16449.
  • Blog entry on initial devnet-0 challenges https://www.potuz.net/posts/epbs-devnet-0/.
• Teku/nimbus not running on devnet yet, planned later.
• ePBS forcing the EL to trigger block production on older heads.
• The issue with PTC lookahead: ethereum/consensus-specs#4979.

Other Glamsterdam

• snap/2: BAL-based state healing proposal (Toni/@nerolation, Gary/@rjl493456442) — EIP draft.

Gas limit / eth/70 / eth/71

• eth/70 implementation update (carry forward).
• eth/71 (EIP-8159): Clarify response size cap (10 MiB → 2 MiB soft cap), EIPs#11387 (@nerolation).

State bloat

perf-devnet-3

dora · explorer · forkmon

• Infrastructure issues, Nethermind/Reth/Erigon, snapshot timeline, reth#22721. Geth stable at correct height.
• 50 GB ERC20 complete, EOA bloating in progress...
• Need all clients synced for snapshot.

Meta

• ACDT call format/cadence discussion (biweekly proposal) — Eth R&D thread.

Call Series

All Core Devs - Testing

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🔧 Meeting Configuration

Duration

60 minutes

Occurrence Rate

weekly

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[github-actions]

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[nerolation]

I'd like to quickly talk about snap/2: BAL-based State Healing, described here.

[nerolation]

Based on feedback from Bosul, I've prepared a draft PR for eth/71, updating the cap of 10 MiB to having a soft cap of 2 MiB in consistency with other responses (e.g. blocks, receipts, headers):
ethereum/EIPs#11387

[akashkshirsagar31]

X Stream: https://x.com/i/broadcasts/1OxwblLVBpgJB

[qu0b]

• Deployed and syncing dedicated benchmarking nodes for bal-devnet-2 (geth besu): Qu0b/bal benchmark ethpandaops/bal-devnets#29
• reth & nethermind & etherex update on bal benchmarking flags (prefetch, sequential, all optimizations)?
• What is the status on local BAL benchmarking e.g. https://github.com/ethereum/execution-specs/pull/2033
• bal-devnet-3 local testing ongoing

[potuz]

Want to add two topics of discussion

• ePBS forcing the EL to trigger block production on older heads
• The issue with PTC lookahead.

[github-actions]

This meeting occurred more than 24 hours ago. Closing automatically.