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PQI2026-05-27_041

PQ Interop #041

2026-05-27 2 decisions 367 transcript lines

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Call summary

Targets
  • P95 aggregation time target: <1 second per client on DevNet 4 — 00:31:47
  • Multi-message aggregation (9 payloads) target: <0.4s before DevNet 5 launch — 00:40:27
Decisions
  • Deprioritize DevNet 5 work; focus all teams on stabilizing DevNet 4 first — 00:47:14
  • Use Shadow simulations to progress DevNet 5 interop testing in parallel with real performance work — 00:56:27
Highlights
  • Documentation:
    • ·lean spec simplification underway: XMSS section simplified, type tests added; logic unchanged — 00:25:14
    • ·LeanVM Python verifier (1,200 lines, excluding Poseidon/field arithmetic) completed; ZKDSL documentation next — 00:27:35
  • Client Updates:
    • ·Zeam: DevNet 5 multi-message aggregation over 9 payloads takes 4–5s; target is <0.5s — 00:08:17
    • ·Ream: min-signers crash fixed by requiring ≥3 signers; proposes continuing on DevNet 4 until stable — 00:16:39
    • ·Lantern: new LPPDP and SSZ libraries integrated; Hive gossip tests passing; DevNet 5 support added — 00:19:18
    • ·Ethlambda: fixed attestation fallback bug; merged block-building algorithm improvement; lean spec PR merged with test vectors — 00:20:23
    • ·Gean: DevNet 4 consensus stable; async aggregation refactor brings latency in line with other clients — 00:22:31
  • Infrastructure:
    • ·LeanVM on Hetzner AX42U (~$50/month) achieves ~50% of M4 Max performance; custom Rust memory allocator yields additional ~20% gain — 00:41:53
    • ·Shadow simulation fuzzer in development: randomizes subnets, aggregators, latency, bandwidth, client mix; supports Zeam and Qlean; needs artificial sleep flags from clients to simulate aggregation delay — 00:49:07
    • ·Shadow sims viable for DevNet 5 interop testing while real aggregation times are being optimized — 00:56:27
  • Testing Progress:
    • ·DevNet 4 (8 subnets, 64 validators): finality achieved to slot 56 then lost; P95 aggregation time is 3–4s across clients, target is <1s — 00:29:51
    • ·Grandine/Qlean/Ream validators on shared servers hitting 3.5GB container memory cap, causing crashes — 00:38:51
    • ·DevNet 4 is using Multisig library ~2 months old; upcoming breaking-change update expected to significantly boost performance — 00:43:09
    • ·Decision: focus on DevNet 4 stability before moving to DevNet 5 broader validator scaling — 00:47:14
Action Items
  • Thomas Coratger + all client teams — Agree on common aggregation metric definition; add to lean spec as source of truth — 00:31:09
  • All client teams — Add configurable artificial-sleep flag for signature aggregation rate to support Shadow simulation — 00:54:41

Meeting chat6

  • Kamil Salakhiev

    if time permits I may share a bit about hw resources and shadow sims

  • Ladislaus

    Reacted to "if time permits I ma..." with 👍

  • Gajinder Singh

    Reacted to "if time permits I ma..." with 👍

  • Parthasarathy Ramanujam

    Reacted to "if time permits I ma..." with 👍

  • Parthasarathy Ramanujam

    Ensure the sleep time matches the current aggregation time

  • Gajinder Singh

    Replying to "Ensure the sleep tim..." not for devnet5, we wan to sim lower

Key decisions

  • Deprioritize DevNet 5 work; focus all teams on stabilizing DevNet 4 first

    stabilize DevNet 4 before moving to DevNet 5
  • Use Shadow simulations to progress DevNet 5 interop testing in parallel with real performance work

    parallel testing with real performance work