Network Team Update

Overview of sprints: 103, 104, 105, 106.

The most important changes are patches developed after the November fork incident on Mainnet, which make the diffusion layer more robust. These patches are released in the cardano-node-10.5.4 release. We highly recommend updating to 10.5.4 as these change make the Cardano Network more robust. We'd like to thank Karl Knutsson (CF) who developed these patches.

This report only contains issues/PRs finished/merged in the sprints 103 through 106. Work that has been carried and finished in the current sprint will be reported in the future.

Ouroboros-Network

Diffusion

• Optimised connectivity to peers behind firewall
• ChainSync timeouts:
  • no chain-sync StNext StMustReply timeout for trustable local root peers
• More robust diffusion A series of patches after the November incident:
  • enforce max reconnection attempts,
  • use shorter timeout when waiting on chain-sync to exit,
  • block-fetch: exclude peers that are shutting down in active peers calculation,
  • chain-sync: bumped StNext StMustReply timeout from a range of 135-269s to 601-911s.
• WASM support

Cardano-Ping

• Unknown version received in cardano-cli ping

Leios

• Network mux demo for analysing Leios/Praos traffic
• mux leios simulation

Technical Debt

• Small changes
• fixed nightly build
• Removed duplicate trace events
• Fixed a typo

Cardano-Node

• networking adjustments for the new tracing system

DMQ-Node

• Signature verification
• Moved dmq-node to its own repo
• Enhance validation logic
• Mempool fixes: various bug fixes and code refactorings for the dmq-node.
• PeerSelectionPoolicy for dmq-node