🆕 wf_act_send_signal & wf_trg_recv_signal

the signal sender can only be a max of 25 in a room
the signal receiver can only be a max of 5 in a room
one signal receiver can only accept a max of 5 senders (you can select the receivers with the senders)
Why : otherwise you can flood the rooms and let you CPU go 🍌

Emulator/src/main/java/com/eu/habbo/habbohotel/items/ItemManager.java

@@ -221,6 +221,7 @@ public class ItemManager {
         this.interactionsList.add(new ItemInteraction("wf_trg_score_achieved", WiredTriggerScoreAchieved.class));
         this.interactionsList.add(new ItemInteraction("wf_trg_game_team_win", WiredTriggerTeamWins.class));
         this.interactionsList.add(new ItemInteraction("wf_trg_game_team_lose", WiredTriggerTeamLoses.class));
+        this.interactionsList.add(new ItemInteraction("wf_trg_recv_signal", WiredTriggerReceiveSignal.class));
 
 
         this.interactionsList.add(new ItemInteraction("wf_act_toggle_state", WiredEffectToggleFurni.class));
@@ -258,6 +259,7 @@ public class ItemManager {
         this.interactionsList.add(new ItemInteraction("wf_slc_furni_bytype", WiredEffectFurniByType.class));
         this.interactionsList.add(new ItemInteraction("wf_slc_users_area", WiredEffectUsersArea.class));
         this.interactionsList.add(new ItemInteraction("wf_slc_users_neighborhood", WiredEffectUsersNeighborhood.class));
+        this.interactionsList.add(new ItemInteraction("wf_act_send_signal", WiredEffectSendSignal.class));
 
         this.interactionsList.add(new ItemInteraction("wf_cnd_has_furni_on", WiredConditionFurniHaveFurni.class));
         this.interactionsList.add(new ItemInteraction("wf_cnd_furnis_hv_avtrs", WiredConditionFurniHaveHabbo.class));

Emulator/src/main/java/com/eu/habbo/habbohotel/items/interactions/wired/effects/WiredEffectSendSignal.java

@@ -0,0 +1,350 @@
+package com.eu.habbo.habbohotel.items.interactions.wired.effects;
+
+import com.eu.habbo.Emulator;
+import com.eu.habbo.habbohotel.gameclients.GameClient;
+import com.eu.habbo.habbohotel.items.Item;
+import com.eu.habbo.habbohotel.items.interactions.InteractionWiredEffect;
+import com.eu.habbo.habbohotel.items.interactions.InteractionWiredTrigger;
+import com.eu.habbo.habbohotel.items.interactions.wired.WiredSettings;
+import com.eu.habbo.habbohotel.rooms.Room;
+import com.eu.habbo.habbohotel.rooms.RoomSpecialTypes;
+import com.eu.habbo.habbohotel.rooms.RoomTile;
+import com.eu.habbo.habbohotel.rooms.RoomUnit;
+import com.eu.habbo.habbohotel.users.HabboItem;
+import com.eu.habbo.habbohotel.wired.WiredEffectType;
+import com.eu.habbo.habbohotel.wired.core.*;
+import com.eu.habbo.habbohotel.wired.core.WiredEvent;
+import com.eu.habbo.messages.ServerMessage;
+import com.eu.habbo.messages.incoming.wired.WiredSaveException;
+import gnu.trove.procedure.TObjectProcedure;
+import gnu.trove.set.hash.THashSet;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.*;
+import java.util.stream.Collectors;
+
+
+public class WiredEffectSendSignal extends InteractionWiredEffect {
+    private static final Logger LOGGER = LoggerFactory.getLogger(WiredEffectSendSignal.class);
+
+    public static final WiredEffectType type = WiredEffectType.SEND_SIGNAL;
+
+    private static final int MAX_SIGNAL_DEPTH = 10;
+
+    private static final int ANTENNA_PICKED  = 0;
+    private static final int ANTENNA_TRIGGER = 1;
+
+    private static final int FORWARD_NONE    = 0;
+    private static final int FORWARD_TRIGGER = 1;
+
+    private THashSet<HabboItem> items;
+    private int     antennaSource   = ANTENNA_PICKED;
+    private int     furniForward    = FORWARD_NONE;
+    private int     userForward     = FORWARD_NONE;
+    private boolean signalPerFurni  = false;
+    private boolean signalPerUser   = false;
+    private int     channel         = 0;
+
+    public WiredEffectSendSignal(ResultSet set, Item baseItem) throws SQLException {
+        super(set, baseItem);
+        this.items = new THashSet<>();
+    }
+
+    public WiredEffectSendSignal(int id, int userId, Item item, String extradata, int limitedStack, int limitedSells) {
+        super(id, userId, item, extradata, limitedStack, limitedSells);
+        this.items = new THashSet<>();
+    }
+
+    @Override
+    public void execute(WiredContext ctx) {
+        Room room = ctx.room();
+        if (room == null) return;
+
+        LOGGER.debug("[SendSignal] execute() called, itemId={}, antennaSource={}, pickedItems={}", this.getId(), antennaSource, this.items.size());
+
+        int currentDepth = ctx.event().getCallStackDepth();
+        if (currentDepth >= MAX_SIGNAL_DEPTH) {
+            LOGGER.debug("[SendSignal] Max signal depth reached ({}), aborting", currentDepth);
+            return;
+        }
+
+        Collection<HabboItem> antennas;
+        if (antennaSource == ANTENNA_TRIGGER) {
+            antennas = ctx.sourceItem()
+                    .map(Collections::<HabboItem>singleton)
+                    .orElse(Collections.emptySet());
+        } else {
+            antennas = ctx.targets().isItemsModifiedBySelector()
+                    ? new ArrayList<>(ctx.targets().items())
+                    : new ArrayList<>(this.items);
+        }
+
+        if (antennas.isEmpty()) {
+            LOGGER.debug("[SendSignal] No antennas resolved, aborting. antennaSource={}, selectorModified={}", antennaSource, ctx.targets().isItemsModifiedBySelector());
+            return;
+        }
+        LOGGER.debug("[SendSignal] Resolved {} antenna(s), firing signals", antennas.size());
+
+        RoomUnit forwardedUser = null;
+        if (userForward == FORWARD_TRIGGER) {
+            forwardedUser = ctx.actor().orElse(null);
+        }
+
+        HabboItem forwardedFurni = null;
+        if (furniForward == FORWARD_TRIGGER) {
+            forwardedFurni = ctx.sourceItem().orElse(null);
+        }
+
+        Set<String> visitedTiles = new HashSet<>();
+        List<RoomTile> antennaTiles = new ArrayList<>();
+        for (HabboItem antenna : antennas) {
+            if (antenna == null) continue;
+            String key = antenna.getX() + "," + antenna.getY();
+            if (visitedTiles.add(key)) {
+                RoomTile tile = room.getLayout().getTile(antenna.getX(), antenna.getY());
+                if (tile != null) {
+                    antennaTiles.add(tile);
+                }
+            }
+        }
+
+        int nextDepth = currentDepth + 1;
+
+        if (signalPerFurni || signalPerUser) {
+            if (signalPerFurni) {
+                for (RoomTile tile : antennaTiles) {
+                    fireSignalAtTile(room, tile, forwardedUser, forwardedFurni, nextDepth);
+                }
+            }
+            if (signalPerUser && ctx.targets().hasUsers()) {
+                for (RoomUnit user : ctx.targets().users()) {
+                    for (RoomTile tile : antennaTiles) {
+                        fireSignalAtTile(room, tile, user, forwardedFurni, nextDepth);
+                    }
+                }
+            } else if (!signalPerFurni) {
+                for (RoomTile tile : antennaTiles) {
+                    fireSignalAtTile(room, tile, forwardedUser, forwardedFurni, nextDepth);
+                }
+            }
+        } else {
+            for (RoomTile tile : antennaTiles) {
+                fireSignalAtTile(room, tile, forwardedUser, forwardedFurni, nextDepth);
+            }
+        }
+    }
+
+    private void fireSignalAtTile(Room room, RoomTile tile, RoomUnit actor, HabboItem sourceItem, int depth) {
+        LOGGER.debug("[SendSignal] fireSignalAtTile: tile={},{} depth={} channel={} actor={} sourceItem={}", tile.x, tile.y, depth, channel, actor != null ? actor.getId() : "null", sourceItem != null ? sourceItem.getId() : "null");
+
+        WiredEvent.Builder builder = WiredEvent.builder(WiredEvent.Type.SIGNAL_RECEIVED, room)
+                .tile(tile)
+                .callStackDepth(depth)
+                .signalChannel(this.channel)
+                .triggeredByEffect(true);
+
+        if (actor != null) builder.actor(actor);
+        if (sourceItem != null) builder.sourceItem(sourceItem);
+
+        boolean result = WiredManager.handleEvent(builder.build());
+        LOGGER.debug("[SendSignal] handleEvent returned: {}", result);
+    }
+
+    @Override
+    public void serializeWiredData(ServerMessage message, Room room) {
+        List<HabboItem> itemsSnapshot = new ArrayList<>(this.items);
+
+        itemsSnapshot.removeIf(item ->
+                item.getRoomId() != this.getRoomId() || room.getHabboItem(item.getId()) == null);
+        this.items.retainAll(itemsSnapshot);
+
+        message.appendBoolean(false);
+        message.appendInt(WiredManager.MAXIMUM_FURNI_SELECTION);
+        message.appendInt(itemsSnapshot.size());
+        for (HabboItem item : itemsSnapshot) {
+            message.appendInt(item.getId());
+        }
+        message.appendInt(this.getBaseItem().getSpriteId());
+        message.appendInt(this.getId());
+        message.appendString("");
+
+        message.appendInt(6);
+        message.appendInt(antennaSource);
+        message.appendInt(furniForward);
+        message.appendInt(userForward);
+        message.appendInt(signalPerFurni ? 1 : 0);
+        message.appendInt(signalPerUser ? 1 : 0);
+        message.appendInt(channel);
+
+        message.appendInt(0);
+        message.appendInt(this.getType().code);
+        message.appendInt(this.getDelay());
+
+        if (this.requiresTriggeringUser()) {
+            List<Integer> invalidTriggers = new ArrayList<>();
+            room.getRoomSpecialTypes().getTriggers(this.getX(), this.getY()).forEach(new TObjectProcedure<InteractionWiredTrigger>() {
+                @Override
+                public boolean execute(InteractionWiredTrigger object) {
+                    if (!object.isTriggeredByRoomUnit()) {
+                        invalidTriggers.add(object.getBaseItem().getSpriteId());
+                    }
+                    return true;
+                }
+            });
+            message.appendInt(invalidTriggers.size());
+            for (Integer i : invalidTriggers) {
+                message.appendInt(i);
+            }
+        } else {
+            message.appendInt(0);
+        }
+    }
+
+    @Override
+    public boolean saveData(WiredSettings settings, GameClient gameClient) throws WiredSaveException {
+        int itemsCount = settings.getFurniIds().length;
+        if (itemsCount > Emulator.getConfig().getInt("hotel.wired.furni.selection.count")) {
+            throw new WiredSaveException("Too many furni selected");
+        }
+
+        List<HabboItem> newItems = new ArrayList<>();
+        Room room = Emulator.getGameEnvironment().getRoomManager().getRoom(this.getRoomId());
+        for (int i = 0; i < itemsCount; i++) {
+            int itemId = settings.getFurniIds()[i];
+            HabboItem it = room.getHabboItem(itemId);
+            if (it == null) throw new WiredSaveException(String.format("Item %s not found", itemId));
+            newItems.add(it);
+        }
+
+        if (room != null && room.getRoomSpecialTypes() != null) {
+            for (HabboItem receiver : newItems) {
+                int count = room.getRoomSpecialTypes().countSendersTargetingReceiver(receiver.getId(), this);
+                if (count >= RoomSpecialTypes.MAX_SENDERS_PER_RECEIVER) {
+                    throw new WiredSaveException("Maximum of " + RoomSpecialTypes.MAX_SENDERS_PER_RECEIVER + " senders per receiver reached");
+                }
+            }
+        }
+
+        int delay = settings.getDelay();
+        if (delay > Emulator.getConfig().getInt("hotel.wired.max_delay", 20)) {
+            throw new WiredSaveException("Delay too long");
+        }
+
+        int[] params = settings.getIntParams();
+        this.antennaSource  = params.length > 0 ? params[0] : ANTENNA_PICKED;
+        this.furniForward   = params.length > 1 ? params[1] : FORWARD_NONE;
+        this.userForward    = params.length > 2 ? params[2] : FORWARD_NONE;
+        this.signalPerFurni = params.length > 3 && params[3] == 1;
+        this.signalPerUser  = params.length > 4 && params[4] == 1;
+        this.channel = params.length > 5 ? params[5] : 0;
+        this.items.clear();
+        this.items.addAll(newItems);
+        this.setDelay(delay);
+
+        LOGGER.debug("[SendSignal] saveData: antennaSource={}, furniForward={}, userForward={}, signalPerFurni={}, signalPerUser={}, channel={}, items={}",
+                antennaSource, furniForward, userForward, signalPerFurni, signalPerUser, channel, items.size());
+
+        return true;
+    }
+
+    @Deprecated
+    @Override
+    public boolean execute(RoomUnit roomUnit, Room room, Object[] stuff) {
+        return false;
+    }
+
+    @Override
+    public String getWiredData() {
+        List<HabboItem> itemsSnapshot = new ArrayList<>(this.items);
+        return WiredManager.getGson().toJson(new JsonData(
+                this.getDelay(),
+                itemsSnapshot.stream().map(HabboItem::getId).collect(Collectors.toList()),
+                antennaSource, furniForward, userForward, signalPerFurni, signalPerUser, channel
+        ));
+    }
+
+    @Override
+    public void loadWiredData(ResultSet set, Room room) throws SQLException {
+        this.items = new THashSet<>();
+        String wiredData = set.getString("wired_data");
+
+        if (wiredData != null && wiredData.startsWith("{")) {
+            JsonData data = WiredManager.getGson().fromJson(wiredData, JsonData.class);
+            this.setDelay(data.delay);
+            this.antennaSource  = data.antennaSource;
+            this.furniForward   = data.furniForward;
+            this.userForward    = data.userForward;
+            this.signalPerFurni = data.signalPerFurni;
+            this.signalPerUser  = data.signalPerUser;
+            this.channel        = data.channel;
+            if (data.itemIds != null) {
+                for (Integer id : data.itemIds) {
+                    HabboItem item = room.getHabboItem(id);
+                    if (item != null) this.items.add(item);
+                }
+            }
+        }
+    }
+
+    @Override
+    public void onPickUp() {
+        this.items.clear();
+        this.antennaSource  = ANTENNA_PICKED;
+        this.furniForward   = FORWARD_NONE;
+        this.userForward    = FORWARD_NONE;
+        this.signalPerFurni = false;
+        this.signalPerUser  = false;
+        this.channel        = 0;
+        this.setDelay(0);
+    }
+
+    @Override
+    public WiredEffectType getType() {
+        return type;
+    }
+
+    public int getChannel() {
+        return channel;
+    }
+
+    public boolean hasPickedItem(int itemId) {
+        try {
+            for (HabboItem item : new ArrayList<>(this.items)) {
+                if (item != null && item.getId() == itemId) return true;
+            }
+        } catch (Exception e) {
+        }
+        return false;
+    }
+
+    @Override
+    protected long requiredCooldown() {
+        return COOLDOWN_TRIGGER_STACKS;
+    }
+
+    static class JsonData {
+        int delay;
+        List<Integer> itemIds;
+        int antennaSource;
+        int furniForward;
+        int userForward;
+        boolean signalPerFurni;
+        boolean signalPerUser;
+        int channel;
+
+        public JsonData(int delay, List<Integer> itemIds, int antennaSource, int furniForward,
+                        int userForward, boolean signalPerFurni, boolean signalPerUser, int channel) {
+            this.delay          = delay;
+            this.itemIds        = itemIds;
+            this.antennaSource  = antennaSource;
+            this.furniForward   = furniForward;
+            this.userForward    = userForward;
+            this.signalPerFurni = signalPerFurni;
+            this.signalPerUser  = signalPerUser;
+            this.channel        = channel;
+        }
+    }
+}

Emulator/src/main/java/com/eu/habbo/habbohotel/items/interactions/wired/triggers/WiredTriggerReceiveSignal.java

@@ -0,0 +1,118 @@
+package com.eu.habbo.habbohotel.items.interactions.wired.triggers;
+
+import com.eu.habbo.habbohotel.items.Item;
+import com.eu.habbo.habbohotel.items.interactions.InteractionWiredTrigger;
+import com.eu.habbo.habbohotel.items.interactions.wired.WiredSettings;
+import com.eu.habbo.habbohotel.rooms.Room;
+import com.eu.habbo.habbohotel.rooms.RoomSpecialTypes;
+import com.eu.habbo.habbohotel.rooms.RoomUnit;
+import com.eu.habbo.habbohotel.users.HabboItem;
+import com.eu.habbo.habbohotel.wired.WiredTriggerType;
+import com.eu.habbo.habbohotel.wired.core.WiredEvent;
+import com.eu.habbo.habbohotel.wired.core.WiredManager;
+import com.eu.habbo.messages.ServerMessage;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+public class WiredTriggerReceiveSignal extends InteractionWiredTrigger {
+    public static final WiredTriggerType type = WiredTriggerType.RECEIVE_SIGNAL;
+
+    private int channel = 0; // signal channel (0-based)
+
+    public WiredTriggerReceiveSignal(ResultSet set, Item baseItem) throws SQLException {
+        super(set, baseItem);
+    }
+
+    public WiredTriggerReceiveSignal(int id, int userId, Item item, String extradata, int limitedStack, int limitedSells) {
+        super(id, userId, item, extradata, limitedStack, limitedSells);
+    }
+
+    @Override
+    public boolean matches(HabboItem triggerItem, WiredEvent event) {
+        return event.getType() == WiredEvent.Type.SIGNAL_RECEIVED
+                && event.getSignalChannel() == this.channel;
+    }
+
+    public int getChannel() {
+        return channel;
+    }
+
+    @Override
+    public boolean isTriggeredByRoomUnit() {
+        return false;
+    }
+
+    @Deprecated
+    @Override
+    public boolean execute(RoomUnit roomUnit, Room room, Object[] stuff) {
+        return false;
+    }
+
+    @Override
+    public WiredTriggerType getType() {
+        return type;
+    }
+
+    @Override
+    public void serializeWiredData(ServerMessage message, Room room) {
+        int senderCount = 0;
+        try {
+            if (room != null && room.getRoomSpecialTypes() != null) {
+                senderCount = room.getRoomSpecialTypes().countSendersTargetingReceiver(this.getId());
+            }
+        } catch (Exception e) {
+        }
+
+        message.appendBoolean(false);
+        message.appendInt(0);
+        message.appendInt(0);
+        message.appendInt(this.getBaseItem().getSpriteId());
+        message.appendInt(this.getId());
+        message.appendString("");
+        message.appendInt(3);
+        message.appendInt(channel);
+        message.appendInt(senderCount);
+        message.appendInt(RoomSpecialTypes.MAX_SENDERS_PER_RECEIVER);
+        message.appendInt(0);
+        message.appendInt(this.getType().code);
+        message.appendInt(0);
+        message.appendInt(0);
+    }
+
+    @Override
+    public boolean saveData(WiredSettings settings) {
+        int[] params = settings.getIntParams();
+        this.channel = params.length > 0 ? params[0] : 0;
+        return true;
+    }
+
+    @Override
+    public String getWiredData() {
+        return WiredManager.getGson().toJson(new JsonData(channel));
+    }
+
+    @Override
+    public void loadWiredData(ResultSet set, Room room) throws SQLException {
+        String wiredData = set.getString("wired_data");
+        if (wiredData != null && wiredData.startsWith("{")) {
+            JsonData data = WiredManager.getGson().fromJson(wiredData, JsonData.class);
+            this.channel = data.channel;
+        }
+    }
+
+    @Override
+    public void onPickUp() {
+        this.channel = 0;
+    }
+
+    static class JsonData {
+        int channel;
+
+        public JsonData() {}
+
+        public JsonData(int channel) {
+            this.channel = channel;
+        }
+    }
+}

Emulator/src/main/java/com/eu/habbo/habbohotel/rooms/FurnitureMovementError.java

@@ -14,7 +14,9 @@ public enum FurnitureMovementError {
     MAX_DIMMERS("${room.error.max_dimmers}"),
     MAX_SOUNDFURNI("${room.errors.max_soundfurni}"),
     MAX_ITEMS("${room.error.max_furniture}"),
-    MAX_STICKIES("${room.error.max_stickies}");
+    MAX_STICKIES("${room.error.max_stickies}"),
+    MAX_SIGNAL_SENDERS("${room.error.max_signal_senders}"),
+    MAX_SIGNAL_RECEIVERS("${room.error.max_signal_receivers}");
 
 
     public final String errorCode;

Emulator/src/main/java/com/eu/habbo/habbohotel/rooms/RoomItemManager.java

@@ -14,7 +14,9 @@ import com.eu.habbo.habbohotel.items.interactions.games.freeze.InteractionFreeze
 import com.eu.habbo.habbohotel.items.interactions.games.tag.InteractionTagField;
 import com.eu.habbo.habbohotel.items.interactions.games.tag.InteractionTagPole;
 import com.eu.habbo.habbohotel.items.interactions.pets.*;
+import com.eu.habbo.habbohotel.items.interactions.wired.effects.WiredEffectSendSignal;
 import com.eu.habbo.habbohotel.items.interactions.wired.extra.WiredBlob;
+import com.eu.habbo.habbohotel.items.interactions.wired.triggers.WiredTriggerReceiveSignal;
 import com.eu.habbo.habbohotel.permissions.Permission;
 import com.eu.habbo.habbohotel.users.Habbo;
 import com.eu.habbo.habbohotel.users.HabboInfo;
@@ -1261,6 +1263,16 @@ public class RoomItemManager {
      * Places a floor furniture item at a position.
      */
     public FurnitureMovementError placeFloorFurniAt(HabboItem item, RoomTile tile, int rotation, Habbo owner) {
+        RoomSpecialTypes specialTypes = this.room.getRoomSpecialTypes();
+        if (specialTypes != null) {
+            if (item instanceof WiredEffectSendSignal && specialTypes.isSignalSenderLimitReached()) {
+                return FurnitureMovementError.MAX_SIGNAL_SENDERS;
+            }
+            if (item instanceof WiredTriggerReceiveSignal && specialTypes.isSignalReceiverLimitReached()) {
+                return FurnitureMovementError.MAX_SIGNAL_RECEIVERS;
+            }
+        }
+
         boolean pluginHelper = false;
         if (Emulator.getPluginManager().isRegistered(FurniturePlacedEvent.class, true)) {
             FurniturePlacedEvent event = Emulator.getPluginManager()

Emulator/src/main/java/com/eu/habbo/habbohotel/rooms/RoomSpecialTypes.java

@@ -21,6 +21,7 @@ import com.eu.habbo.habbohotel.items.interactions.pets.InteractionPetFood;
 import com.eu.habbo.habbohotel.items.interactions.pets.InteractionPetToy;
 import com.eu.habbo.habbohotel.items.interactions.pets.InteractionPetTree;
 import com.eu.habbo.habbohotel.users.HabboItem;
+import com.eu.habbo.habbohotel.items.interactions.wired.effects.WiredEffectSendSignal;
 import com.eu.habbo.habbohotel.wired.WiredConditionType;
 import com.eu.habbo.habbohotel.wired.WiredEffectType;
 import com.eu.habbo.habbohotel.wired.WiredTriggerType;
@@ -340,6 +341,41 @@ public class RoomSpecialTypes {
      * Adds a wired trigger to the room.
      * @param trigger The trigger to add
      */
+    public static final int MAX_SIGNAL_SENDERS_PER_ROOM = 25;
+    public static final int MAX_SIGNAL_RECEIVERS_PER_ROOM = 5;
+    public static final int MAX_SENDERS_PER_RECEIVER = 5;
+
+    public boolean isSignalSenderLimitReached() {
+        Set<InteractionWiredEffect> existing = this.wiredEffects.get(WiredEffectType.SEND_SIGNAL);
+        return existing != null && existing.size() >= MAX_SIGNAL_SENDERS_PER_ROOM;
+    }
+
+    public boolean isSignalReceiverLimitReached() {
+        Set<InteractionWiredTrigger> existing = this.wiredTriggers.get(WiredTriggerType.RECEIVE_SIGNAL);
+        return existing != null && existing.size() >= MAX_SIGNAL_RECEIVERS_PER_ROOM;
+    }
+
+    public int countSendersTargetingReceiver(int receiverItemId, InteractionWiredEffect excludeSender) {
+        Set<InteractionWiredEffect> senders = this.wiredEffects.get(WiredEffectType.SEND_SIGNAL);
+        if (senders == null) return 0;
+
+        int count = 0;
+        for (InteractionWiredEffect effect : senders) {
+            if (excludeSender != null && effect.getId() == excludeSender.getId()) continue;
+            if (effect instanceof WiredEffectSendSignal) {
+                WiredEffectSendSignal sender = (WiredEffectSendSignal) effect;
+                if (sender.hasPickedItem(receiverItemId)) {
+                    count++;
+                }
+            }
+        }
+        return count;
+    }
+
+    public int countSendersTargetingReceiver(int receiverItemId) {
+        return countSendersTargetingReceiver(receiverItemId, null);
+    }
+
     public void addTrigger(InteractionWiredTrigger trigger) {
         // Add to type-based index
         this.wiredTriggers.computeIfAbsent(trigger.getType(), k -> ConcurrentHashMap.newKeySet())

Emulator/src/main/java/com/eu/habbo/habbohotel/wired/WiredEffectType.java

@@ -31,7 +31,8 @@ public enum WiredEffectType {
     FURNI_NEIGHBORHOOD_SELECTOR(29),
     FURNI_BYTYPE_SELECTOR(30),
     USERS_AREA_SELECTOR(31),
-    USERS_NEIGHBORHOOD_SELECTOR(32);
+    USERS_NEIGHBORHOOD_SELECTOR(32),
+    SEND_SIGNAL(33);
 
     public final int code;
 

Emulator/src/main/java/com/eu/habbo/habbohotel/wired/WiredTriggerType.java

@@ -20,7 +20,8 @@ public enum WiredTriggerType {
     UNIDLES(11),
     CUSTOM(13),
     STARTS_DANCING(11),
-    STOPS_DANCING(11);
+    STOPS_DANCING(11),
+    RECEIVE_SIGNAL(15);
 
     public final int code;
 

Emulator/src/main/java/com/eu/habbo/habbohotel/wired/core/WiredEvent.java

@@ -94,6 +94,9 @@ public final class WiredEvent {
         /** Team loses a game */
         TEAM_LOSES(WiredTriggerType.CUSTOM),
         
+        /** Signal received from a Send Signal effect */
+        SIGNAL_RECEIVED(WiredTriggerType.RECEIVE_SIGNAL),
+
         /** Custom trigger type for plugins */
         CUSTOM(WiredTriggerType.CUSTOM);
 
@@ -137,6 +140,7 @@ public final class WiredEvent {
     private final int scoreAdded;       // amount added for score achieved events
     private final boolean triggeredByEffect; // true if triggered by a wired effect (to prevent loops)
     private final int callStackDepth;   // recursion depth for trigger stacks effect
+    private final int signalChannel;    // channel for signal routing (0-based)
     private final long createdAtMs;
 
     private WiredEvent(Builder builder) {
@@ -151,6 +155,7 @@ public final class WiredEvent {
         this.scoreAdded = builder.scoreAdded;
         this.triggeredByEffect = builder.triggeredByEffect;
         this.callStackDepth = builder.callStackDepth;
+        this.signalChannel = builder.signalChannel;
         this.createdAtMs = builder.createdAtMs;
     }
 
@@ -249,6 +254,10 @@ public final class WiredEvent {
         return callStackDepth;
     }
 
+    public int getSignalChannel() {
+        return signalChannel;
+    }
+
     /**
      * Get the timestamp when this event was created.
      * @return milliseconds since epoch
@@ -303,6 +312,7 @@ public final class WiredEvent {
         private int scoreAdded;
         private boolean triggeredByEffect;
         private int callStackDepth;
+        private int signalChannel;
         private long createdAtMs = System.currentTimeMillis();
 
         private Builder(Type type, Room room) {
@@ -402,6 +412,11 @@ public final class WiredEvent {
             return this;
         }
 
+        public Builder signalChannel(int signalChannel) {
+            this.signalChannel = signalChannel;
+            return this;
+        }
+
         /**
          * Set a custom creation timestamp.
          * @param createdAtMs milliseconds since epoch