chore: clean network robustness

Explorer/Assets/DCL/Infrastructure/ECS/Unity/StreamableLoading/NFTShapes/LoadNFTTypeSystem.cs

@@ -38,7 +38,11 @@ protected override async UniTask<StreamableLoadingResult<NftTypeResult>> FlowInt
             StreamableLoadingState state, IPartitionComponent partition, CancellationToken ct)
         {
             string imageUrl = await ImageUrlAsync(intention.CommonArguments, ct);
-            string convertUrl = ktxEnabled ? string.Format(urlsSource.Url(DecentralandUrl.MediaConverter), Uri.EscapeDataString(imageUrl)) : imageUrl;
+
+            // Same guard as GetTextureWebRequest: non-publicly-routable URLs must not reach the hosted converter.
+            string convertUrl = ktxEnabled && !DCL.WebRequests.WebRequestUtils.IsNonPubliclyRoutable(imageUrl)
+                ? string.Format(urlsSource.Url(DecentralandUrl.MediaConverter), Uri.EscapeDataString(imageUrl))
+                : imageUrl;
             var contentInfo = await WebContentInfo.FetchAsync(convertUrl, ct);
 
             if (!ktxEnabled && contentInfo is { Type: WebContentInfo.ContentType.Image, SizeInBytes: > MAX_PREVIEW_SIZE })

Explorer/Assets/DCL/Multiplayer/Connections/Archipelago/LiveConnections/WebSocketArchipelagoLiveConnection.cs

@@ -20,6 +20,14 @@ public class WebSocketArchipelagoLiveConnection : IArchipelagoLiveConnection
     {
         private const int BUFFER_SIZE = 1024 * 1024; //1MB
 
+        /// <summary>
+        ///     Budget for the graceful close handshake before hard-dropping the socket. The server ack
+        ///     is only worth waiting for briefly: the receive loop that would read it is already
+        ///     cancelled when a room stops, so an unbounded CloseAsync hung the teleport pipeline
+        ///     into its 10s timeout.
+        /// </summary>
+        private static readonly TimeSpan CLOSE_HANDSHAKE_BUDGET = TimeSpan.FromSeconds(1);
+
         private readonly IMemoryPool memoryPool;
 
         private Current? current;
@@ -48,8 +56,22 @@ public async UniTask<Result> DisconnectAsync(CancellationToken token)
         {
             try
             {
-                TryUpdateWebSocket();
-                await current!.Value.WebSocket.CloseAsync(WebSocketCloseStatus.NormalClosure, string.Empty, token);
+                if (current?.WebSocket.State is WebSocketState.Open or WebSocketState.Connecting)
+                {
+                    using var closeCts = CancellationTokenSource.CreateLinkedTokenSource(token);
+                    closeCts.CancelAfter(CLOSE_HANDSHAKE_BUDGET);
+
+                    try { await current!.Value.WebSocket.CloseAsync(WebSocketCloseStatus.NormalClosure, string.Empty, closeCts.Token); }
+                    catch (OperationCanceledException) when (token.IsCancellationRequested) { throw; }
+                    catch (Exception)
+                    {
+                        // The handshake exceeded its budget or the socket errored out; hard-drop below.
+                    }
+                }
+
+                // Install a fresh socket so a subsequent ConnectAsync can never race the old instance.
+                current?.Dispose();
+                current = Current.New();
                 return Result.SuccessResult();
             }
             catch (Exception e) { return Result.ErrorResult($"Cannot disconnect: {e}"); }

Explorer/Assets/DCL/Multiplayer/Connections/Archipelago/Rooms/ArchipelagoIslandRoom.cs

@@ -56,6 +56,20 @@ ICurrentAdapterAddress currentAdapterAddress
             this.currentAdapterAddress = currentAdapterAddress;
         }
 
+        public override async UniTask StopAsync()
+        {
+            await base.StopAsync();
+
+            // Close the sign-flow ws on stop. Otherwise the next StartAsync reuses the
+            // still-open socket (EnsureConnectionAsync sees IsConnected and skips the
+            // handshake), the server keeps the old peer+island, never re-sends
+            // IslandChanged — and the restarted room waits for a connection string that
+            // never arrives (observed as 3x10s RestartRoom timeouts on every
+            // world->genesis realm change).
+            try { await signFlow.DisconnectAsync(CancellationToken.None); }
+            catch (Exception e) { ReportHub.LogWarning(ReportCategory.COMMS_SCENE_HANDLER, $"ArchipelagoIslandRoom stop: disconnect failed: {e.Message}"); }
+        }
+
         protected override async UniTask PrewarmAsync(CancellationToken token)
         {
             // Reset the per-session state: the room instance is reused across StopAsync/StartAsync (teleport, logout)

Explorer/Assets/DCL/Multiplayer/Connections/GateKeeper/Rooms/IGateKeeperSceneRoom.cs

@@ -35,9 +35,9 @@ public interface IGateKeeperSceneRoom : IActivatableConnectiveRoom, ISceneRoomSt
 
         class Fake : Null, IGateKeeperSceneRoom
         {
-            public event Action? CurrentSceneRoomConnected;
-            public event Action? CurrentSceneRoomDisconnected;
-            public event Action? CurrentSceneRoomForbiddenAccess;
+            public event Action? CurrentSceneRoomConnected { add { } remove { } }
+            public event Action? CurrentSceneRoomDisconnected { add { } remove { } }
+            public event Action? CurrentSceneRoomForbiddenAccess { add { } remove { } }
             public MetaData? ConnectedScene { get; } = new MetaData("Fake", Vector2Int.zero, new MetaData.Input());
 
             public bool Activated => true;

Explorer/Assets/DCL/Multiplayer/Connections/Rooms/NullRoom.cs

@@ -34,21 +34,21 @@ public class NullRoom : IRoom
         public IAudioStreams AudioStreams => NullAudioStreams.INSTANCE;
         public ILocalTracks LocalTracks => NullLocalTracks.INSTANCE;
 
-        public event LocalPublishDelegate? LocalTrackPublished;
-        public event LocalPublishDelegate? LocalTrackUnpublished;
-        public event PublishDelegate? TrackPublished;
-        public event PublishDelegate? TrackUnpublished;
-        public event SubscribeDelegate? TrackSubscribed;
-        public event SubscribeDelegate? TrackUnsubscribed;
-        public event MuteDelegate? TrackMuted;
-        public event MuteDelegate? TrackUnmuted;
+        public event LocalPublishDelegate? LocalTrackPublished { add { } remove { } }
+        public event LocalPublishDelegate? LocalTrackUnpublished { add { } remove { } }
+        public event PublishDelegate? TrackPublished { add { } remove { } }
+        public event PublishDelegate? TrackUnpublished { add { } remove { } }
+        public event SubscribeDelegate? TrackSubscribed { add { } remove { } }
+        public event SubscribeDelegate? TrackUnsubscribed { add { } remove { } }
+        public event MuteDelegate? TrackMuted { add { } remove { } }
+        public event MuteDelegate? TrackUnmuted { add { } remove { } }
 #endif
 
-        public event ConnectionQualityChangeDelegate? ConnectionQualityChanged;
-        public event ConnectionStateChangeDelegate? ConnectionStateChanged;
-        public event ConnectionDelegate? ConnectionUpdated;
-        public event Room.MetaDelegate? RoomMetadataChanged;
-        public event Room.SidDelegate? RoomSidChanged;
+        public event ConnectionQualityChangeDelegate? ConnectionQualityChanged { add { } remove { } }
+        public event ConnectionStateChangeDelegate? ConnectionStateChanged { add { } remove { } }
+        public event ConnectionDelegate? ConnectionUpdated { add { } remove { } }
+        public event Room.MetaDelegate? RoomMetadataChanged { add { } remove { } }
+        public event Room.SidDelegate? RoomSidChanged { add { } remove { } }
 
         public void UpdateLocalMetadata(string metadata)
         {

Explorer/Assets/DCL/Multiplayer/Connections/Rooms/Nulls/NullActiveSpeakers.cs

@@ -11,7 +11,7 @@ public class NullActiveSpeakers : IActiveSpeakers
 
         public int Count => 0;
 
-        public event Action? Updated;
+        public event Action? Updated { add { } remove { } }
 
         public IEnumerator<string> GetEnumerator()
         {

Explorer/Assets/DCL/Multiplayer/Connections/Rooms/Nulls/NullDataPipe.cs

@@ -10,7 +10,7 @@ public class NullDataPipe : IDataPipe
     {
         public static readonly NullDataPipe INSTANCE = new ();
 
-        public event ReceivedDataDelegate? DataReceived;
+        public event ReceivedDataDelegate? DataReceived { add { } remove { } }
 
         public void PublishData(Span<byte> data, string topic, IReadOnlyCollection<string> destinationSids, LKDataPacketKind kind = LKDataPacketKind.KindLossy)
         {

Explorer/Assets/DCL/Multiplayer/Connections/Rooms/Nulls/NullParticipantsHub.cs

@@ -12,7 +12,7 @@ public class NullParticipantsHub : IParticipantsHub
         public static readonly LKParticipant NULL_PARTICIPANT = new ();
         public static readonly WeakReference<LKParticipant> WEAK_NULL_PARTICIPANT = new (NULL_PARTICIPANT);
 
-        public event ParticipantDelegate? UpdatesFromParticipant;
+        public event ParticipantDelegate? UpdatesFromParticipant { add { } remove { } }
 
         public LKParticipant LocalParticipant() =>
             NULL_PARTICIPANT;

Explorer/Assets/DCL/Multiplayer/Connections/Systems/RoomIndicator.prefab

@@ -9,7 +9,6 @@ GameObject:
   serializedVersion: 6
   m_Component:
   - component: {fileID: 6615945845340605545}
-  - component: {fileID: 6145739770501069584}
   m_Layer: 5
   m_Name: RoomIndicator
   m_TagString: Untagged
@@ -39,33 +38,6 @@ RectTransform:
   m_AnchoredPosition: {x: 0, y: 0}
   m_SizeDelta: {x: 0.45, y: 0.3}
   m_Pivot: {x: 0.5, y: 0.5}
---- !u!114 &6145739770501069584
-MonoBehaviour:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  m_GameObject: {fileID: 2074114889938352466}
-  m_Enabled: 1
-  m_EditorHideFlags: 0
-  m_Script: {fileID: 11500000, guid: d7d34f10598c4f638b94710f3b0ff918, type: 3}
-  m_Name: 
-  m_EditorClassIdentifier: 
-  colors:
-  - source: 0
-    indicator: N/A
-    color: {r: 0.41509432, g: 0.41509432, b: 0.41509432, a: 1}
-  - source: 1
-    indicator: G
-    color: {r: 0.07143695, g: 0.26501098, b: 0.5283019, a: 1}
-  - source: 2
-    indicator: I
-    color: {r: 0.07058824, g: 0.5294118, b: 0.22292237, a: 1}
-  - source: 3
-    indicator: I+G
-    color: {r: 0.55345905, g: 0.06787699, b: 0.48883247, a: 1}
-  background: {fileID: 2968721729092005038}
-  text: {fileID: 1326886004246566054}
 --- !u!1 &2433736487283086053
 GameObject:
   m_ObjectHideFlags: 0
@@ -123,6 +95,8 @@ MeshRenderer:
   m_RayTracingAccelStructBuildFlagsOverride: 0
   m_RayTracingAccelStructBuildFlags: 1
   m_SmallMeshCulling: 1
+  m_ForceMeshLod: -1
+  m_MeshLodSelectionBias: 0
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
@@ -144,9 +118,11 @@ MeshRenderer:
   m_AutoUVMaxDistance: 0.5
   m_AutoUVMaxAngle: 89
   m_LightmapParameters: {fileID: 0}
+  m_GlobalIlluminationMeshLod: 0
   m_SortingLayerID: 0
   m_SortingLayer: 0
   m_SortingOrder: 10
+  m_MaskInteraction: 0
   m_AdditionalVertexStreams: {fileID: 0}
 --- !u!114 &1326886004246566054
 MonoBehaviour:
@@ -206,6 +182,7 @@ MonoBehaviour:
   m_VerticalAlignment: 512
   m_textAlignment: 65535
   m_characterSpacing: 0
+  m_characterHorizontalScale: 1
   m_wordSpacing: 0
   m_lineSpacing: 0
   m_lineSpacingMax: 0
@@ -280,6 +257,7 @@ RectTransform:
   m_Pivot: {x: 0.5, y: 0.5}
 --- !u!212 &544308281080233652
 SpriteRenderer:
+  serializedVersion: 2
   m_ObjectHideFlags: 0
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
@@ -298,6 +276,8 @@ SpriteRenderer:
   m_RayTracingAccelStructBuildFlagsOverride: 0
   m_RayTracingAccelStructBuildFlags: 1
   m_SmallMeshCulling: 1
+  m_ForceMeshLod: -1
+  m_MeshLodSelectionBias: 0
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
@@ -319,9 +299,11 @@ SpriteRenderer:
   m_AutoUVMaxDistance: 0.5
   m_AutoUVMaxAngle: 89
   m_LightmapParameters: {fileID: 0}
+  m_GlobalIlluminationMeshLod: 0
   m_SortingLayerID: 0
   m_SortingLayer: 0
   m_SortingOrder: 1
+  m_MaskInteraction: 0
   m_Sprite: {fileID: 21300000, guid: 37894a231569347e8b89612f29611b85, type: 3}
   m_Color: {r: 0.13836467, g: 0.13836467, b: 0.13836467, a: 1}
   m_FlipX: 0
@@ -331,7 +313,6 @@ SpriteRenderer:
   m_AdaptiveModeThreshold: 0.5
   m_SpriteTileMode: 0
   m_WasSpriteAssigned: 1
-  m_MaskInteraction: 0
   m_SpriteSortPoint: 0
 --- !u!1 &3907013848479446928
 GameObject:
@@ -371,6 +352,7 @@ RectTransform:
   m_Pivot: {x: 0.5, y: 0.5}
 --- !u!212 &2968721729092005038
 SpriteRenderer:
+  serializedVersion: 2
   m_ObjectHideFlags: 0
   m_CorrespondingSourceObject: {fileID: 0}
   m_PrefabInstance: {fileID: 0}
@@ -389,6 +371,8 @@ SpriteRenderer:
   m_RayTracingAccelStructBuildFlagsOverride: 0
   m_RayTracingAccelStructBuildFlags: 1
   m_SmallMeshCulling: 1
+  m_ForceMeshLod: -1
+  m_MeshLodSelectionBias: 0
   m_RenderingLayerMask: 1
   m_RendererPriority: 0
   m_Materials:
@@ -410,9 +394,11 @@ SpriteRenderer:
   m_AutoUVMaxDistance: 0.5
   m_AutoUVMaxAngle: 89
   m_LightmapParameters: {fileID: 0}
+  m_GlobalIlluminationMeshLod: 0
   m_SortingLayerID: 0
   m_SortingLayer: 0
   m_SortingOrder: 0
+  m_MaskInteraction: 0
   m_Sprite: {fileID: 21300000, guid: 12dd1efc4e826764f9b02be515a9a033, type: 3}
   m_Color: {r: 0.5529412, g: 0.06666667, b: 0.49019608, a: 1}
   m_FlipX: 0
@@ -422,5 +408,4 @@ SpriteRenderer:
   m_AdaptiveModeThreshold: 0.5
   m_SpriteTileMode: 0
   m_WasSpriteAssigned: 1
-  m_MaskInteraction: 0
   m_SpriteSortPoint: 0

Explorer/Assets/DCL/Social/WebSocketRpcTransport.cs

@@ -94,6 +94,7 @@ async UniTaskVoid ListenAndProcessIncomingDataAsync(CancellationToken ct)
                         }
                     }
                     catch (OperationCanceledException) { break; }
+                    catch (ObjectDisposedException) { break; }
                     catch (WebSocketException e)
                     {
                         OnErrorEvent?.Invoke(e);
@@ -119,6 +120,12 @@ public virtual async UniTask SendMessageAsync(byte[] data, CancellationToken ct)
             {
                 OnErrorEvent?.Invoke(e);
             }
+            // The socket can be disposed mid-send during teardown/reconnect (isDisposed was false at
+            // entry); surface it like a send failure so callers don't believe the message was delivered.
+            catch (ObjectDisposedException e)
+            {
+                OnErrorEvent?.Invoke(e);
+            }
         }
 
         public virtual async UniTask SendMessageAsync(string data, CancellationToken ct)
@@ -130,6 +137,10 @@ public virtual async UniTask SendMessageAsync(string data, CancellationToken ct)
             {
                 OnErrorEvent?.Invoke(e);
             }
+            catch (ObjectDisposedException e)
+            {
+                OnErrorEvent?.Invoke(e);
+            }
         }
 
         public void Close() =>
@@ -141,7 +152,8 @@ public async UniTask CloseAsync(CancellationToken ct)
 
             if (State is WebSocketState.Open or WebSocketState.CloseReceived)
             {
-                await webSocket.CloseAsync(WebSocketCloseStatus.NormalClosure, "", ct);
+                try { await webSocket.CloseAsync(WebSocketCloseStatus.NormalClosure, "", ct); }
+                catch (ObjectDisposedException) { return; }
                 OnCloseEvent?.Invoke();
             }
         }

Explorer/Assets/DCL/WebRequests/Dumper/EnvelopeJsonConverter.cs

@@ -143,8 +143,8 @@ public override void WriteJson(JsonWriter writer, WebRequestDump.Envelope? value
                 }
             }
 
-            if (!commonArguments.HasValue || argsType == null)
-                throw new JsonSerializationException("Required properties 'commonArguments' or 'argsType' are missing");
+            if (!commonArguments.HasValue || argsType == null || requestType == null || args == null)
+                throw new JsonSerializationException("Required properties 'commonArguments', 'requestType', 'argsType', or 'args' are missing");
 
             var envelope = new WebRequestDump.Envelope(requestType, commonArguments.Value, argsType, args, headersInfo, startTime, effectiveUrl);
             envelope.Conclude(statusKind, endTime);

Explorer/Assets/DCL/WebRequests/GenericDownloadHandlerUtils.cs

@@ -322,6 +322,10 @@ public OverwriteFromJsonAsyncOp(T target, WRJsonParser jsonParser, WRThreadFlags
 
                             using var textReader = new StreamReader(stream, Encoding.UTF8);
                             using var jsonReader = new JsonTextReader(textReader);
+
+                            if (Target == null)
+                                throw new InvalidOperationException($"{nameof(OverwriteFromJsonAsyncOp<T, TRequest>)} requires a non-null {nameof(Target)} to populate");
+
                             serializer.Populate(jsonReader, Target);
                         }
                     }

Explorer/Assets/DCL/WebRequests/Texture/GetTextureWebRequest.cs

@@ -37,7 +37,9 @@ public static CreateTextureOp CreateTexture(TextureWrapMode wrapMode, FilterMode
 
         internal static GetTextureWebRequest Initialize(string url, GetTextureArguments textureArguments, IDecentralandUrlsSource urlsSource, bool ktxEnabled)
         {
-            bool useKtx = textureArguments.UseKtx && ktxEnabled && !WebRequestUtils.IsLocalhost(url);
+            // Never hand a non-publicly-routable content URL to the hosted converter: its workers
+            // cannot reach the host, so the job hangs until TCP timeout and clogs the converter queue.
+            bool useKtx = textureArguments.UseKtx && ktxEnabled && !WebRequestUtils.IsNonPubliclyRoutable(url);
             string requestUrl = useKtx ? string.Format(urlsSource.Url(DecentralandUrl.MediaConverter), Uri.EscapeDataString(url)) : url;
             UnityWebRequest webRequest = UnityWebRequest.Get(requestUrl);