Development environment setup for litep2p-webrtc

[freddyli7]

Issue summary

We need a development environment to verify/test/try our implementation ideal with regarding WebRTC where we have smoldot extraction on one side to something that imports litep2p on the server side.

For smoldot side extraction: we need something that follows the smoldot way of using libp2p-webrtc-direct, and compiles to WASM that runs in a browser.

Other information and links

The deliverable should be a repo that has both of libp2p-webrtc and litep2p setup

Specifically it should be able to use this test: https://github.com/paritytech/litep2p/blob/3b664f7bef7cbf86176f8929bac349f9340462d8/tests/webrtc.rs#L35

This setup should open a ping network stream and the block announce network stream; however, nothing will get sent over the block announce stream for now, but ping/pong should work.

[freddyli7]

I've forked a smoldot repo and pushed the libp2p-webrtc side setup here along with the high level notes for #20

[haikoschol]

I've branched off Freddys branch here. After a few days of trying, I've finally gotten the noise handshake to work. But I had to modify WebRtcFraming::read_write(). I assume this was necessary because I am using the type wrong somehow. I don't understand why reading the protobuf frame is skipped completely when inner_stream_expected_incoming_bytes is None.

I've successfully tested the handshake against Tims PoC server at the "just ping" state.

The handshake does not seem to work against the test WebRTC server in the litep2p repo.

The next steps are probably:

1. Figure out why I had to modify WebRtcFraming::read_write() to make it work with Tims server.
2. Make the noise handshake work with the litep2p server.
3. Add pings.

[timwu20]

Deliverable is PR into CS litep2p-perf repo utilizing our smoldot fork, rust-libp2p fork, and based off of existing work on litep2p-perf PR.

[haikoschol]

lexnv/litep2p-perf#3