Use reference instead of move Host

waku/src/node/discovery.rs

@@ -12,7 +12,7 @@ use crate::Result;
 /// The nameserver can optionally be specified to resolve the enrtree url. Otherwise uses the default system dns.
 pub fn waku_dns_discovery(
     url: &Url,
-    server: Option<Host>,
+    server: Option<&Host>,
     timeout: Option<Duration>,
 ) -> Result<Vec<Multiaddr>> {
     let result = unsafe {

waku/src/node/mod.rs

@@ -324,7 +324,7 @@ impl WakuNodeHandle<Running> {
     pub fn dns_discovery(
         &self,
         url: &Url,
-        nameserver: Option<Host>,
+        nameserver: Option<&Host>,
         timeout: Option<Duration>,
     ) -> Result<Vec<Multiaddr>> {
         discovery::waku_dns_discovery(url, nameserver, timeout)