[Tracking Issue] P2P State Part Transfer

[saketh-are]

Tasks

Beta Give feedback

1. [network] Expand STUN-based IP self-discovery to all nodes #11999
   A-network T-core +2
   
2. [network] Implement Tier3 connection pool #12000
   A-network T-core +2
   
3. [network] Implement p2p state part transfer #12001
   A-network T-core +2
   
4. [state sync] Update sync actor to use p2p state part transfer #12002
   A-network T-core +2
   
5. [network] Implement rate limiting for state part requests #12003
   A-network T-core +2
   

[walnut-the-cat]

Aug 30th progress

• Heavily simplified approach for #11999

[walnut-the-cat]

Sept 2-13

• completed a first draft of the implementation to decentralize the state part transfer for state sync. The major features are built and it is working well in localnet based on manual testing.

Sept 16-

• Test this code in a mocknet setup in which the validators repeatedly switch their tracked shards to trigger lots of state syncs.
• Break the draft PR into smaller PRs and add finishing touches, metrics, tests, etc. before sharing for review.