TXRX Team Update - May 1, 2020

Eth2 Network Monitor

Jonny Rhea - Twitter - Github

Most work was dedicated to bugs found in Eth2 spec, implementations and testnets while developing/using Prkl

Discv5 (Rust implementation)

• Issue: crash when updating table on PONG response

  • Fix: https://github.com/sigp/rust-libp2p/commit/7a486b52547ebf49cf84a017e1c45bd00ba02645

• Issue: intermittent invalid Discv5 session causes panic - https://github.com/sigp/lighthouse/issues/1033

  • Fix: https://github.com/sigp/rust-libp2p/commit/46415e9467a42e70c6bb3d2525354e648867c6a3

Ethereum 2.0 Specification

• Issue: Adverse effect of sharing peers between testnets/mainnet - https://github.com/ethereum/eth2.0-specs/issues/1770

  • Fix: Suggested in issue, but TBD

• Issue: Noticed high seq no's in the topaz testnet due to frequent attnets field updates - https://github.com/ethereum/eth2.0-specs/issues/1774

  • Fix: Add note to clarify when to update ENR record attnet - https://github.com/ethereum/eth2.0-specs/pull/1775

• Issue: ATTESTATION_SUBNET_COUNT should be dynamic - https://github.com/ethereum/eth2.0-specs/issues/1777

  • Fix: Suggested in issue, but TBD

Prysm

• Issue: Noticed anomaloies in the distribution subnet subscriptions stored in enr records -https://github.com/prysmaticlabs/prysm/issues/5696 (Under review)

Verifiable Precompiles

Alex Vlasov - Twitter - GitHub

• Published write-up Optimizing Trusted Code Base for Verified Precompiles

Fork Choice Test

Alev Vlasov - Twitter - GitHub

• Continue to work on testing protoarray fork choice
• Improved pyspec transpiler: fixed some compilation errors in output code

Cross-shard Transaction Simulation

Joseph Delong - Twitter - GitHub

Cross-shard transaction simulator now renamed Vorpal is officially feature complete. Initial testing results coming next week

• Improved CSV data output
• Added feature to sweep cross-shard transaction probability during simulation
• Improved transaction collision tracking
• Separated transaction generation and simulation improving replicability of simulation

Discovery v5 Simulation

Dmitry Shmatko - Github

Moving to the final point of Discovery v5 advertisement options efficiency analysis through simulation.

• Simulator is capable to provide measurements for all needed metrics for Discovery v5 and ENR
• 2 improvement proposals are on idea stage (both for ENR ads approach), need to confirm with simulation numbers
• writeup needs only numbers and conclusion, other parts are ready

Eth1 <-> Eth2 Merge

Mikhail Kalinin - Twitter - Github

Working on Eth2 API design with members of Lodestar and Prysm. A working group has formed and is gathering after the Eth2 API call. We have come to the consensus regarding the API and are drafting a PR to get other implementers' feedback.

Also, I've got a feedback from Danny Ryan, Guillaume Ballet, Tim Beiko and my TX/RX teammates on Scope of Eth1-Eth2 merger writeup. Polishing it this week and aiming to publish it on Monday.

Next step is to organize a call with other implementers who work on the merger and start specifying the requirements for prototyping.