EPIC: Improve Networking Layer

[leonardostsouza]

Improve networking layer:

• Ack system (heartbeat or liveness)
  • Implement new endpoint that will tell if a validator is active through RPC
    • Heartbeat/liveness should check every node every ~10 seconds (think about this interval. This is just a suggestion).
    • The node running as a validator should be able to protect itself against Denial-of-Service attacks, however
• Internal communication (hyperswarm) has to happen in binary data to decrease latency
• Establish a set of error codes in communication
• Remake the whole validator handshake to improve performance (conserving PKI for security)
• Keep code modular using classes