Expose utils.convertPeerId

[JGAntunes]

Hello 👋

First of all great work 👍 awesome module with great docs 😄

I'm using it in pulsarcast - ipfs/notes#266 and I'm currently looking for a way to access the closest peer(s) to a given peer locally. I understand this is a really specific use case for which exposing a method might not be worth it 🤷‍♂️ but I was wondering if exposing utils.convertPeerId as a static method would be something you would consider? This would be more than enough for me to then perform the search in the local routing table and I take it it could be useful to have some way on the module API to convert a PeerId into a DHT key?

[daviddias]

@JGAntunes might not be worth it as that method is just sugar coating on multihashing, see:

https://github.com/libp2p/js-libp2p-kad-dht/blob/master/src/utils.js#L32-L34

That said, also not opposed. If you want to create a PR that exposes it, we can take it :)

[kumavis]

👋 @JGAntunes
maybe a new method in RoutingTable ? closestPeersByPeerId

closestPeersByPeerId (peerId, count) {
   // ... 
}

[JGAntunes]

@daviddias thanks, I'll take a look into exposing it, will submit a PR when I have some time.

@kumavis well that would be ideal 😄 if you folks think it would be useful happy to work on it.