avoid resolution of onion hosts when creating proxied server socket addresses

src/main/java/com/sparrowwallet/sparrow/net/Protocol.java

@@ -117,8 +117,12 @@ public enum Protocol {
         return toUrlString() + hostAndPort.toString();
     }
 
+    public static boolean isOnionHost(String host) {
+        return host != null && host.toLowerCase(Locale.ROOT).endsWith(TorService.TOR_ADDRESS_SUFFIX);
+    }
+
     public static boolean isOnionAddress(HostAndPort server) {
-        return server.getHost().toLowerCase(Locale.ROOT).endsWith(TorService.TOR_ADDRESS_SUFFIX);
+        return isOnionHost(server.getHost());
     }
 
     public static boolean isOnionAddress(String address) {

src/main/java/com/sparrowwallet/sparrow/net/ProxySocketFactory.java

@@ -33,12 +33,12 @@ public class ProxySocketFactory extends SocketFactory {
 
     @Override
     public Socket createSocket(String address, int port) throws IOException {
-        return createSocket(new InetSocketAddress(address, port), null);
+        return createSocket(createAddress(address, port), null);
     }
 
     @Override
     public Socket createSocket(String address, int port, InetAddress localAddress, int localPort) throws IOException {
-        return createSocket(new InetSocketAddress(address, port), new InetSocketAddress(localAddress, localPort));
+        return createSocket(createAddress(address, port), new InetSocketAddress(localAddress, localPort));
     }
 
     @Override
@@ -51,6 +51,14 @@ public class ProxySocketFactory extends SocketFactory {
         return createSocket(new InetSocketAddress(address, port), new InetSocketAddress(localAddress, localPort));
     }
 
+    private InetSocketAddress createAddress(String address, int port) {
+        if(Protocol.isOnionHost(address)) {
+            return InetSocketAddress.createUnresolved(address, port);
+        } else {
+            return new InetSocketAddress(address, port);
+        }
+    }
+
     private Socket createSocket(InetSocketAddress address, InetSocketAddress bindAddress) throws IOException {
         Socket socket = new Socket(proxy);
         if(bindAddress != null) {