Juno P2P sync - design & implement initial sync

[stranger80]

• Initial Juno sync process:
  • Implement the ability for Juno node to run in one of two modes:
  1. "bootstrap node" sync - syncing from from Feeder gateway,
  • ...while it already participates in p2p communication
    • ...it serves/gossips information
    • ...it does not pull information from other p2p nodes (ie. it only syncs from Feeder gateway)
  2. "normal node" sync - syncing from other nodes, incl. the bootstrap node
  • "Block sync" design & implement logic to request information from other peers
    • make sure to validate the signatures on the received messages
  • Add telemetry metrics (eg. number of p2p peers known? ping times for peers?)

[omerfirmak]

There isn't a separate milestone like "getting to sync from a single peer first" We will always sync from all the peers that we are connected to.

[kirugan]

This issue was already implemented