feat: circuit relay

[danisharora099]

Problem

Through Peer Exchange, we are able to discover more and more peers.
Some of peers found using Peer Exchange might not have a directly reachable multiaddr (possibly behind NAT/firewall/etc but have a connection with a circuit relay server which can be used to establish a transient connection with this unreachable node.

js-waku currently does not support dialing a peer using a circuit relay

Solution

• enable support for circuit relay dials
• construct circuit relay addresses correctly based on the ENR limitation ()

Notes

• resolves peer-exchange: investigate p2p-circuit address discovery & connection #1527
• works against go-waku
• currenty blocked by nwaku: feat: enable circuit-relay client nwaku#2130 (comment)
• js-libp2p by default does not allow opening streams over transient connections (https://github.com/libp2p/js-libp2p/blob/28c1b9051e928b130c1656cdbb112a0447704b9f/doc/migrations/v0.45-v0.46.md?plain=1#L75)
  • it is possible to override this default and allow opening streams over these connections, but this needs to be confirmed by @waku-org/go-waku-developers and @waku-org/nwaku-developers since these connections are not direct and may have limitations
  • upgrading this transient connection to a direct connection could be possible using DCUtR

Possible Improvements:

go-waku: waku-org/go-waku#815

• allow a local go-waku node to be used as a circuit relay server instead of relying on a fleet node
  • iirc the blocker is actually on go-libp2p not being able to use a node on the same IP as a circuit relay server
• discard requirement on a secure websocket connection and allow unsecure socket connections
• allow to read a log line to know when the ENR is populated with a p2p-circuit addrs (this currently takes ~20/25 seconds and we're manually awaiting this delay)

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
Waku core	27.74 KB (-0.47% 🔽)	555 ms (-0.47% 🔽)	338 ms (+50.94% 🔺)	893 ms
Waku Simple Light Node	268.79 KB (+2.26% 🔺)	5.4 s (+2.26% 🔺)	592 ms (-34.57% 🔽)	6 s
ECIES encryption	29.56 KB (0%)	592 ms (0%)	303 ms (+3.99% 🔺)	894 ms
Symmetric encryption	29.56 KB (0%)	592 ms (0%)	322 ms (+11.24% 🔺)	913 ms
DNS discovery	110.68 KB (0%)	2.3 s (0%)	533 ms (+33.24% 🔺)	2.8 s
Privacy preserving protocols	117.31 KB (-0.12% 🔽)	2.4 s (-0.12% 🔽)	361 ms (-9.64% 🔽)	2.8 s
Light protocols	25.89 KB (-0.47% 🔽)	518 ms (-0.47% 🔽)	199 ms (-2.76% 🔽)	717 ms
History retrieval protocols	25.05 KB (-0.52% 🔽)	502 ms (-0.52% 🔽)	222 ms (-16.41% 🔽)	723 ms
Deterministic Message Hashing	5.65 KB (0%)	113 ms (0%)	84 ms (+17% 🔺)	197 ms