[Epic] 2.2: Sharded capability discovery for light protocols

[jm-clius]

Epic label: E:2.2: Sharded cap discovery for light protocols

Summary

Ability to discover peers providing filter, lightpush and peer-exchange services within the decentralised network. To the application this should present as a peer selection mechanism that translates content topics to underlying shard.

Acceptance Criteria

Tasks

• js-waku: feat: Service peer selection on specific shards js-waku#1506
• go-waku: feat: Support getting peers by shard via PeerExchange go-waku#839

[fryorcraken]

Only work tracked with this epic so far is js-waku work: https://github.com/orgs/waku-org/projects/2/views/2?filterQuery=is%3Aopen+label%3A%22E%3A2.2%3A+Sharded+cap+discovery+for+light+protocols%22&sortedBy%5Bdirection%5D=asc&sortedBy%5BcolumnId%5D=Status

From waku-org/research#3 (comment)

Task: Service peer selection on specific shards

Currently a service peer (e.g. a store node) is either provided by the application or it expects the peer manager to suggest a suitable service peer (selectPeer()). This task focuses on the latter: peer manager should provide ability to find service peers for a specific shard, based on the content topic that the application is interested in (e.g. an API call to selectPeer(Protocol, ContentTopic)), or kick off an ad-hoc discovery process until a suitable service peer is found. Client APIs (for filter, lightpush, peer-exchange) should automatically make use of this mechanism if the application does not explicitly set the desired service peer.

Owners:

Overall: @alrevuelta
Implementations:
    nwaku: @alrevuelta
    go-waku: @chaitanyaprem
    js-waku: ??

Priority: critical for launch

I do not see any issue tracking this work in nwaku/research.go-waku.

@alrevuelta, are you able to clarify the work needed here? cc @jm-clius

[alrevuelta]

#63 (comment)

@SionoiS Mind having a look? Maybe related to some of the peer management work you are doing?

[SionoiS]

Duplicate of waku-org/nwaku#1941??? If not, can the difference be clarified?

[fryorcraken]

Duplicate of waku-org/nwaku#1941??? If not, can the difference be clarified?

I suggest to sync with @jm-clius

[jm-clius]

@SionoiS not a duplicate afaics, but the nwaku issue should be linked in this Epic description. The Epic tracks work across all clients.