first commit

Assets/Scripts/HelloWorldManager.cs

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+using Unity.Netcode;
+using UnityEngine;
+
+namespace HelloWorld
+{
+    public class HelloWorldManager : MonoBehaviour
+    {
+        void OnGUI()
+        {
+            GUILayout.BeginArea(new Rect(10, 10, 300, 300));
+            if (!NetworkManager.Singleton.IsClient && !NetworkManager.Singleton.IsServer)
+            {
+                StartButtons();
+            }
+            else
+            {
+                StatusLabels();
+
+                SubmitNewPosition();
+            }
+
+            GUILayout.EndArea();
+        }
+
+        static void StartButtons()
+        {
+            if (GUILayout.Button("Host")) NetworkManager.Singleton.StartHost();
+            if (GUILayout.Button("Client")) NetworkManager.Singleton.StartClient();
+            if (GUILayout.Button("Server")) NetworkManager.Singleton.StartServer();
+        }
+
+        static void StatusLabels()
+        {
+            var mode = NetworkManager.Singleton.IsHost ?
+                "Host" : NetworkManager.Singleton.IsServer ? "Server" : "Client";
+
+            GUILayout.Label("Transport: " +
+                NetworkManager.Singleton.NetworkConfig.NetworkTransport.GetType().Name);
+            GUILayout.Label("Mode: " + mode);
+        }
+
+static void SubmitNewPosition()
+        {
+            if (GUILayout.Button(NetworkManager.Singleton.IsServer ? "Move" : "Request Position Change"))
+            {
+                if (NetworkManager.Singleton.IsServer && !NetworkManager.Singleton.IsClient )
+                {
+                    foreach (ulong uid in NetworkManager.Singleton.ConnectedClientsIds)
+                        NetworkManager.Singleton.SpawnManager.GetPlayerNetworkObject(uid).GetComponent<HelloWorldPlayer>().Move();
+                }
+                else
+                {
+                    var playerObject = NetworkManager.Singleton.SpawnManager.GetLocalPlayerObject();
+                    var player = playerObject.GetComponent<HelloWorldPlayer>();
+                    player.Move();
+                }
+            }
+        }
+    }
+}

Assets/Scripts/HelloWorldManager.cs.meta

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+guid: ba4b698ac704847f38baedb9f4872749
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/HelloWorldPlayer.cs

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+using Unity.Netcode;
+using UnityEngine;
+
+namespace HelloWorld
+{
+    public class HelloWorldPlayer : NetworkBehaviour
+    {
+        public NetworkVariable<Vector3> Position = new NetworkVariable<Vector3>();
+
+        public override void OnNetworkSpawn()
+        {
+            if (IsOwner)
+            {
+                Move();
+            }
+        }
+
+        public void Move()
+        {
+            if (NetworkManager.Singleton.IsServer)
+            {
+                var randomPosition = GetRandomPositionOnPlane();
+                transform.position = randomPosition;
+                Position.Value = randomPosition;
+            }
+            else
+            {
+                SubmitPositionRequestServerRpc();
+            }
+        }
+
+        [ServerRpc]
+        void SubmitPositionRequestServerRpc(ServerRpcParams rpcParams = default)
+        {
+            Position.Value = GetRandomPositionOnPlane();
+        }
+
+        static Vector3 GetRandomPositionOnPlane()
+        {
+            return new Vector3(Random.Range(-3f, 3f), 1f, Random.Range(-3f, 3f));
+        }
+
+        void Update()
+        {
+            transform.position = Position.Value;
+        }
+    }
+}

Assets/Scripts/HelloWorldPlayer.cs.meta

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+guid: 868a87f6b25e948cbab8939b40b07bf8
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
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