Advertising BitTorrent content on the Codex Network [proposal]

[marcinczenko]

In How BitTorrent-Codex integration may look like we capture some basic intuitions on how to bridge the two networks so that the BitTorrent content can be brought down to the Codex network.

This is issue is to deep dive and further elaborate on the issue, which should give us better intuition on how to proceed with extending the BitTorrent client.

The finding will be documented in the docs (this repo).

What do finish with that one:

• investigate and document BitTorrent v1 and v2 torrents
• draft the plan on if/how can we advertise BitTorrent content directly on the Codex network

[marcinczenko]

I am working on a couple of representative examples of how BitTorrent builds up the trees and torrent files. I wanted to have a couple of them to have better grip of what level of information is directly retrievable from the torrent files. For all cases I included both v1 and v2 build up. In particular, I wanted to have more grip on how they do padding while building up the content. All examples are real, I reproducible.

BitTorrent v2 exchange protocol adds 3 new peer messages: hash request, hashes, and hash reject to help the nodes in validating the three with partial information. It would be nice to have some exchange examples from the actual exchange, the spec alone is a bit superficial on how exactly it works. Now that I captured this, I can think a little bit what I see. I also planned our sync-up meeting. I planned it just after the research call, which I assumed you may like to attend. If any other time/day feels more appropriate, let me know...

Here are some drawings (you should be able to zoom in nicely to see the details).

https://link.excalidraw.com/readonly/c9z3gLsV1qkTSQJUxEXk

[marcinczenko]

More docs added on direct advertising BitTorrent content on Codex. Entry point: https://publish.obsidian.md/bittorrent/10+Notes/Advertising+BitTorrent+content+on+Codex.