add nameexists to peers storage

client/peerstorage.go

@@ -193,6 +193,15 @@ func (ps *PeerStorage) GetFromMyLookupKey(publickey string) *Peer {
 	return nil
 }
 
+func (ps *PeerStorage) NameExists(name string) bool {
+	for _, peer := range ps.cache {
+		if peer.Name == name {
+			return true
+		}
+	}
+	return false
+}
+
 func (ps *PeerStorage) GetFromName(name string) *Peer {
 	for _, peer := range ps.cache {
 		if peer.Name == name {