feat: add Default for NetworkArgs and DiscoveryArgs (#5658)

bin/reth/src/args/network_args.rs

@@ -125,6 +125,26 @@ impl NetworkArgs {
     }
 }
 
+impl Default for NetworkArgs {
+    fn default() -> Self {
+        Self {
+            discovery: DiscoveryArgs::default(),
+            trusted_peers: vec![],
+            trusted_only: false,
+            bootnodes: None,
+            peers_file: None,
+            identity: P2P_CLIENT_VERSION.to_string(),
+            p2p_secret_key: None,
+            no_persist_peers: false,
+            nat: NatResolver::Any,
+            addr: DEFAULT_DISCOVERY_ADDR,
+            port: DEFAULT_DISCOVERY_PORT,
+            max_outbound_peers: None,
+            max_inbound_peers: None,
+        }
+    }
+}
+
 /// Arguments to setup discovery
 #[derive(Debug, Args)]
 pub struct DiscoveryArgs {
@@ -166,6 +186,18 @@ impl DiscoveryArgs {
     }
 }
 
+impl Default for DiscoveryArgs {
+    fn default() -> Self {
+        Self {
+            disable_discovery: false,
+            disable_dns_discovery: false,
+            disable_discv4_discovery: false,
+            addr: DEFAULT_DISCOVERY_ADDR,
+            port: DEFAULT_DISCOVERY_PORT,
+        }
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;