fix: CIDv1 error with go-libp2p 0.19 (#32)

The error message changed in libp2p and we no longer get this nice error
message. String matching is a bad practice so just removing it, as we
validate CID and codec already.

namesys.go

@@ -202,12 +202,12 @@ func (ns *mpns) resolveOnceAsync(ctx context.Context, name string, options opts.
 
  // CIDs in IPNS are expected to have libp2p-key multicodec
  // We ease the transition by returning a more meaningful error with a valid CID
- if err != nil && err.Error() == "can't convert CID of type protobuf to a peer ID" {
+ if err != nil {
  ipnsCid, cidErr := cid.Decode(key)
  if cidErr == nil && ipnsCid.Version() == 1 && ipnsCid.Type() != cid.Libp2pKey {
  fixedCid := cid.NewCidV1(cid.Libp2pKey, ipnsCid.Hash()).String()
  codecErr := fmt.Errorf("peer ID represented as CIDv1 require libp2p-key multicodec: retry with /ipns/%s", fixedCid)
- log.Debugf("RoutingResolver: could not convert public key hash %s to peer ID: %s\n", key, codecErr)
+ log.Debugf("RoutingResolver: could not convert public key hash %q to peer ID: %s\n", key, codecErr)
  out <- onceResult{err: codecErr}
  close(out)
  return out