feat: resolve peer IDs as CIDs

This adds support for resolving /ipns/<cidv1-libp2p-key>

cc #5287

License: MIT
Signed-off-by: Marcin Rataj <lidel@lidel.org>

namesys/namesys.go

@@ -6,14 +6,14 @@ import (
 	"time"
 
 	lru "github.com/hashicorp/golang-lru"
+	cid "github.com/ipfs/go-cid"
 	ds "github.com/ipfs/go-datastore"
 	path "github.com/ipfs/go-path"
 	opts "github.com/ipfs/interface-go-ipfs-core/options/namesys"
 	isd "github.com/jbenet/go-is-domain"
 	ci "github.com/libp2p/go-libp2p-core/crypto"
 	peer "github.com/libp2p/go-libp2p-core/peer"
 	routing "github.com/libp2p/go-libp2p-core/routing"
-	mh "github.com/multiformats/go-multihash"
 )
 
 // mpns (a multi-protocol NameSystem) implements generic IPFS naming.
@@ -112,12 +112,12 @@ func (ns *mpns) resolveOnceAsync(ctx context.Context, name string, options opts.
 	}
 
 	// Resolver selection:
-	// 1. if it is a multihash resolve through "ipns".
+	// 1. if it is a CID/multihash resolve through "ipns".
 	// 2. if it is a domain name, resolve through "dns"
 	// 3. otherwise resolve through the "proquint" resolver
 
 	var res resolver
-	if _, err := mh.FromB58String(key); err == nil {
+	if _, err := cid.Decode(key); err == nil {
 		res = ns.ipnsResolver
 	} else if isd.IsDomain(key) {
 		res = ns.dnsResolver