feat!: refactor codebase

[wemeetagain]

Motivation:

• While debugging lodestar with js-libp2p v1.0 I was constantly visually tracing through this library.
• There were several organizational deficiencies that distracted from clearly understanding the code flow.
• This is likely because the usage of noise in libp2p has changed over time.
• This refactoring should result in better auditability of this library.

Review notes:

• Each commit except the last one is small and digestible, can be reviewed individually
• Most changes come from the last commit
  • start with src/protocol.ts which contains the core noise protocol (agnostic to libp2p's usage)
  • then visit src/performHandshake.ts which uses the noise protocol according to the libp2p spec. The initiator and responder flows are broken into separate functions.
  • then everything else

Description

• Fixes to node crypto (in encryption and dh)
• Improved uint16 encode/decode perf
• Reduced allocations of known values (eg: the empty Uint8Array)
• Most types have been aligned with the noise spec where possible, better commented
• Replace code in src/handshakes with src/protocol.ts, this is noise protocol code, following the spec verbatim, agnostic to libp2p usage
• Replace code in src/xx-handshake.ts withsrc/performHandshake.ts` which performs a noise handshake, libp2p-style. This adds logging, reading/writing to a connection, and sending/receiving/verifying a libp2p noise payload.
• Utility functions surrounding the libp2p noise payload have been simplified

BREAKING CHANGE: The return type of ICryptoInterface#chaCha20Poly1305Decrypt has changed, now no longer returns null but rather throws on invalid decryption.

[wemeetagain]

argh release-please never picked this up!

@mpetrunic do you have any ideas?

[wemeetagain]

nevermind, it just appeared!

[mpetrunic]

nevermind, it just appeared!

Souch impatience and doubt in release-please 😋