feat!: libp2p

[sdbondi]

Description

Implements libp2p for tari DAN.

• Adds streaming messaging swarm behaviour
• Integrates Tari RPC framework and libp2p
• Removes RTT wait for RPC session creation (client can send request immediately after handshake message without waiting for server response)
• Implements Relay, DCUtR and hole-punching
• Updates web UIs for validator and indexer

Motivation and Context

The current technique to facilitate inbound connections through a NAT is to use tor onion addresses. Tor latency is too high to make sense for Hotstuff consensus. Latencies in the order of 100-200ms are observed for direct hole-punched connections. This also opens up many features, such as browser-based comms (webRTC), mDNS, uPnP, UDP QUIC, and kademlia that would have required significant engineering effort.

How Has This Been Tested?

Cucumber tests and manually

What process can a PR reviewer use to test or verify this change?

Nodes should function as before. Testing within a local network is simpler as nodes will discover each other and connect automatically.

Breaking Changes

• None
• Requires data directory to be deleted
• Other - Not compatible with previous node versions

[github-actions]

Test Results (CI)

185 tests  +13   185 ✔️ +13   1h 10m 29s ⏱️ - 3m 20s
  50 suites +  2       0 💤 ±  0 
    2 files   ±  0       0 ❌ ±  0 

Results for commit 13eeee9. ± Comparison against base commit 7a59c4d.

♻️ This comment has been updated with latest results.