Integrate Custom Mix Protocol with libp2p for PoC

[AkshayaMani]

Description

This issue details tasks required to integrate the custom Mix protocol with libp2p, showcasing the core features with an anonymized Ping simulation.

Tasks

Sphinx Cryptographic Packet Format Implementation

• Implement core Sphinx packet operations.
  • Define interfaces for required cryptographic primitives (AES, KDF, SHA256, MAC).
  • Define interfaces for core curve25519 operations.
  • Implement custom Sphinx protocol structure (with serialization).
  • Implement Sphinx packet wrapping/unwrapping functions.
• Implement replay protection via tag manager.
• Integrate proof-of-work for spam prevention.

Libp2p Integration

• Create a libp2p protocol adapter for Sphinx.
  • Define protocol ID and message format.
  • Implement protocol handler logic for:
    • Sender nodes (packet creation, wrapping).
    • Intermediary nodes (processing, forwarding).
    • Exit nodes (unwrapping, final delivery).

Simulation

• Develop a network simulation framework:
  • Procedures for node setup and teardown.
  • Basic routing and message passing.
• Node configuration:
  • Define node roles (mix, sender, receiver).
  • Integrate libp2p ping on designated nodes.
• Simulate anonymized Ping:
  • Enable sender nodes to route Ping through local mix.
  • Forward messages through the mix network.
  • Final delivery at the exit node.
• Implement logging for debugging and demonstration.
• Test coverage:
  • Functional tests for mix handlers.
  • Integration tests for libp2p protocol adapter.
  • End-to-end test of the mix network.
• Document simulation steps and analysis.

Additional Notes

• Focus on a functional PoC to demonstrate core functionality.
• Maintain simplicity and clarity to ease future development.
• Document assumptions, limitations, and future improvements.
• Ensure regular team communication and feedback.