2025-10-27 Codex weekly

Week 43 2025 §

Replace bittorrent in status-go §

1. BlockExchange Performance and reliability

   • achieved:
     • Investigated seeder scalability with concurrent task optimization
     • Analyzed network layer behavior under high load
   • next:
     • Optimize network layer resource cleanup
     • Continue delta WantList implementation refinements
     • Performance testing and validation
   • blockers:

2. Implement a Codex library so that clients can use Codex directly from their apps

   • achieved:
     • Added Go context cancellation support in the Go library
     • Integrated the Go library into the status-go build process
     • Shared the Codex integration with the Status team
     • Replaced the Codex HTTP client by the library
     • Created a few tests to ensure the Go library is working
   • next:
     • Create more tests in coordination with Marcin
   • blockers:

3. Integration with status-go

   • achieved:
     • Isolated Repo to test CodexClient, CodexIndexDownloader, and CodexArchiveDownloader: codex-storage/go-codex-client
     • unit and integration (using Codex API) tests for:
       • CodexClient
       • CodexIndexDownloader,
       • CodexArchiveDownloader
     • helping out with adding an extra API to check if given CID is present in Codex repo store
   • next:
     • re-integrating with status-go repo
     • main integration test on the status-go repo
   • blockers:
     • none

4. NAT support

• achieved:
  • finished initial implementation of Autonat, ReachabilityManager, refactoring of port mapping (upnp, nat-pmp) and its integration into ReachabilityManager. Still a draft PR here: https://github.com/codex-storage/nim-codex/pull/1334
• next:
  • testing and finishing of the PR

5. DST Tests
   • achieved:
     • Worked with Alberto to establish a DST test plan
     • DST testing to commence 3 November
     • Majority of required work should be done by then, with the remaining time used for bug fixing and polishing.
   • next:
     • Merging block exchange optimisations into nim-codex
     • Local integration tests in status-go
     • Opening a (non-draft) PR in status-go with implementation work
     • Potentially getting some NAT support in nim-codex.
   • blockers:
6. Specs

• achieved:
  • PRs approved:
    • Purchasing
• next:
• blockers:

Research future work §

• Document: Mixing E-mail with Babel as part of on-going research into mixnets.
• Document: Initial research into Privacy-preserving remote auditing to assess the feasibility of considering this in future phases of the new Codex design.
• Research and experimentation into Tor and other anonymous communication protocols to possibly perform comparative analysis to assess their suitability for inclusion in the new Codex design.