new event TabCompleteRequestEvent and deprecate TabCompleteEvent

Players with permission bungeecord.multiple_connect can have multiple connections with the same Minecraft account.
The UUID and player name is altered to avoid collision with other player:
UUID : xxxxxxxx-xxxx-VIxx-xxxx-xxxxxxxxxxxx
- The UUID version (V above) is now the provided version + 8 (for online player, it is 4, so it becomes C).
- The I digit will follow the index of the duplicated player : first duplicated player is 1, second one is 2.
- The name of the player will be the real player name, followed by the character "." (dot) followed by the duplication index.

Bedrock accounts connected using the Floodgate plugin will not be able to connect multiple times due to the risk of xUID collision.

api/src/main/java/net/md_5/bungee/api/ServerPing.java

@@ -105,13 +105,13 @@ public class ServerPing
     @Deprecated
     public ServerPing(Protocol version, Players players, String description, String favicon)
     {
-        this( version, players, new TextComponent( TextComponent.fromLegacyText( description ) ), favicon == null ? null : Favicon.create( favicon ) );
+        this( version, players, TextComponent.fromLegacy( description ), favicon == null ? null : Favicon.create( favicon ) );
     }
 
     @Deprecated
     public ServerPing(Protocol version, Players players, String description, Favicon favicon)
     {
-        this( version, players, new TextComponent( TextComponent.fromLegacyText( description ) ), favicon );
+        this( version, players, TextComponent.fromLegacy( description ), favicon );
     }
 
     @Deprecated
@@ -139,7 +139,7 @@ public class ServerPing
     @Deprecated
     public void setDescription(String description)
     {
-        this.description = new TextComponent( TextComponent.fromLegacyText( description ) );
+        this.description = TextComponent.fromLegacy( description );
     }
 
     @Deprecated

api/src/main/java/net/md_5/bungee/api/connection/ProxiedPlayer.java

@@ -334,6 +334,9 @@ public interface ProxiedPlayer extends Connection, CommandSender
      * Get the {@link Scoreboard} that belongs to this player.
      *
      * @return this player's {@link Scoreboard}
+     * @deprecated for internal use only, setters will not have the expected
+     * effect, will not update client state, and may corrupt proxy state
      */
+    @Deprecated
     Scoreboard getScoreboard();
 }

api/src/main/java/net/md_5/bungee/api/event/LoginEvent.java

@@ -1,9 +1,7 @@
 package net.md_5.bungee.api.event;
 
-import lombok.AccessLevel;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
-import lombok.Setter;
 import lombok.ToString;
 import net.md_5.bungee.api.Callback;
 import net.md_5.bungee.api.chat.BaseComponent;
@@ -27,8 +25,7 @@ public class LoginEvent extends AsyncEvent<LoginEvent> implements Cancellable
     /**
      * Message to use when kicking if this event is canceled.
      */
-    @Setter(AccessLevel.NONE)
-    private BaseComponent[] cancelReasonComponents;
+    private BaseComponent reason;
     /**
      * Connection attempting to login.
      */
@@ -42,28 +39,44 @@ public class LoginEvent extends AsyncEvent<LoginEvent> implements Cancellable
 
     /**
      * @return reason to be displayed
-     * @deprecated Use component methods instead.
+     * @deprecated use component methods instead
      */
     @Deprecated
     public String getCancelReason()
     {
-        return BaseComponent.toLegacyText( getCancelReasonComponents() );
+        return TextComponent.toLegacyText( getReason() );
     }
 
     /**
      * @param cancelReason reason to be displayed
-     * @deprecated Use
-     * {@link #setCancelReason(net.md_5.bungee.api.chat.BaseComponent...)}
-     * instead.
+     * @deprecated use component methods instead
      */
     @Deprecated
     public void setCancelReason(String cancelReason)
     {
-        setCancelReason( TextComponent.fromLegacyText( cancelReason ) );
+        setReason( TextComponent.fromLegacy( cancelReason ) );
     }
 
+    /**
+     * @return reason to be displayed
+     * @deprecated use single component methods instead
+     */
+    @Deprecated
+    public BaseComponent[] getCancelReasonComponents()
+    {
+        return new BaseComponent[]
+        {
+            getReason()
+        };
+    }
+
+    /**
+     * @param cancelReason reason to be displayed
+     * @deprecated use single component methods instead
+     */
+    @Deprecated
     public void setCancelReason(BaseComponent... cancelReason)
     {
-        this.cancelReasonComponents = cancelReason;
+        setReason( TextComponent.fromArray( cancelReason ) );
     }
 }

api/src/main/java/net/md_5/bungee/api/event/PreLoginEvent.java

@@ -1,9 +1,7 @@
 package net.md_5.bungee.api.event;
 
-import lombok.AccessLevel;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
-import lombok.Setter;
 import lombok.ToString;
 import net.md_5.bungee.api.Callback;
 import net.md_5.bungee.api.chat.BaseComponent;
@@ -32,8 +30,7 @@ public class PreLoginEvent extends AsyncEvent<PreLoginEvent> implements Cancella
     /**
      * Message to use when kicking if this event is canceled.
      */
-    @Setter(AccessLevel.NONE)
-    private BaseComponent[] cancelReasonComponents;
+    private BaseComponent reason;
     /**
      * Connection attempting to login.
      */
@@ -47,28 +44,44 @@ public class PreLoginEvent extends AsyncEvent<PreLoginEvent> implements Cancella
 
     /**
      * @return reason to be displayed
-     * @deprecated Use component methods instead.
+     * @deprecated use component methods instead
      */
     @Deprecated
     public String getCancelReason()
     {
-        return BaseComponent.toLegacyText( getCancelReasonComponents() );
+        return BaseComponent.toLegacyText( getReason() );
     }
 
     /**
      * @param cancelReason reason to be displayed
-     * @deprecated Use
-     * {@link #setCancelReason(net.md_5.bungee.api.chat.BaseComponent...)}
-     * instead.
+     * @deprecated Use component methods instead
      */
     @Deprecated
     public void setCancelReason(String cancelReason)
     {
-        setCancelReason( TextComponent.fromLegacyText( cancelReason ) );
+        setReason( TextComponent.fromLegacy( cancelReason ) );
     }
 
+    /**
+     * @return reason to be displayed
+     * @deprecated use single component methods instead
+     */
+    @Deprecated
+    public BaseComponent[] getCancelReasonComponents()
+    {
+        return new BaseComponent[]
+        {
+            getReason()
+        };
+    }
+
+    /**
+     * @param cancelReason reason to be displayed
+     * @deprecated use single component methods instead
+     */
+    @Deprecated
     public void setCancelReason(BaseComponent... cancelReason)
     {
-        this.cancelReasonComponents = cancelReason;
+        setReason( TextComponent.fromArray( cancelReason ) );
     }
 }

api/src/main/java/net/md_5/bungee/api/event/ServerKickEvent.java

@@ -35,7 +35,7 @@ public class ServerKickEvent extends Event implements Cancellable
     /**
      * Kick reason.
      */
-    private BaseComponent[] kickReasonComponent;
+    private BaseComponent reason;
     /**
      * Server to send player to if this event is cancelled.
      */
@@ -63,24 +63,61 @@ public class ServerKickEvent extends Event implements Cancellable
         this( player, player.getServer().getInfo(), kickReasonComponent, cancelServer, state );
     }
 
+    @Deprecated
     public ServerKickEvent(ProxiedPlayer player, ServerInfo kickedFrom, BaseComponent[] kickReasonComponent, ServerInfo cancelServer, State state)
+    {
+        this( player, kickedFrom, TextComponent.fromArray( kickReasonComponent ), cancelServer, state );
+    }
+
+    public ServerKickEvent(ProxiedPlayer player, ServerInfo kickedFrom, BaseComponent reason, ServerInfo cancelServer, State state)
     {
         this.player = player;
         this.kickedFrom = kickedFrom;
-        this.kickReasonComponent = kickReasonComponent;
+        this.reason = reason;
         this.cancelServer = cancelServer;
         this.state = state;
     }
 
+    /**
+     * @return the kick reason
+     * @deprecated use component methods instead
+     */
     @Deprecated
     public String getKickReason()
     {
-        return BaseComponent.toLegacyText( kickReasonComponent );
+        return BaseComponent.toLegacyText( getReason() );
     }
 
+    /**
+     * @param reason the kick reason
+     * @deprecated use component methods instead
+     */
     @Deprecated
     public void setKickReason(String reason)
     {
-        kickReasonComponent = TextComponent.fromLegacyText( reason );
+        this.setReason( TextComponent.fromLegacy( reason ) );
+    }
+
+    /**
+     * @return the kick reason
+     * @deprecated use single component methods instead
+     */
+    @Deprecated
+    public BaseComponent[] getKickReasonComponent()
+    {
+        return new BaseComponent[]
+        {
+            getReason()
+        };
+    }
+
+    /**
+     * @param kickReasonComponent the kick reason
+     * @deprecated use single component methods instead
+     */
+    @Deprecated
+    public void setKickReasonComponent(BaseComponent[] kickReasonComponent)
+    {
+        this.setReason( TextComponent.fromArray( kickReasonComponent ) );
     }
 }

chat/src/main/java/net/md_5/bungee/api/chat/ComponentBuilder.java

@@ -204,6 +204,33 @@ public final class ComponentBuilder
         return this;
     }
 
+    /**
+     * Appends the {@link TranslationProvider} object to the builder and makes
+     * the last element the current target for formatting. The components will
+     * have all the formatting from previous part.
+     *
+     * @param translatable the translatable object to append
+     * @return this ComponentBuilder for chaining
+     */
+    public ComponentBuilder append(TranslationProvider translatable)
+    {
+        return append( translatable, FormatRetention.ALL );
+    }
+
+    /**
+     * Appends the {@link TranslationProvider} object to the builder and makes
+     * the last element the current target for formatting. You can specify the
+     * amount of formatting retained from previous part.
+     *
+     * @param translatable the translatable object to append
+     * @param retention the formatting to retain
+     * @return this ComponentBuilder for chaining
+     */
+    public ComponentBuilder append(TranslationProvider translatable, FormatRetention retention)
+    {
+        return append( translatable.asTranslatableComponent(), retention );
+    }
+
     /**
      * Appends the text to the builder and makes it the current target for
      * formatting. The text will have all the formatting from previous part.
@@ -455,8 +482,8 @@ public final class ComponentBuilder
     }
 
     /**
-     * Returns the component built by this builder. If this builder is
-     * empty, an empty text component will be returned.
+     * Returns the component built by this builder. If this builder is empty, an
+     * empty text component will be returned.
      *
      * @return the component
      */
@@ -478,8 +505,8 @@ public final class ComponentBuilder
      * <p>
      * <strong>NOTE:</strong> {@link #build()} is preferred as it will
      * consolidate all components into a single BaseComponent with extra
-     * contents as opposed to an array of components which is non-standard
-     * and may result in unexpected behavior.
+     * contents as opposed to an array of components which is non-standard and
+     * may result in unexpected behavior.
      *
      * @return the created components
      */

chat/src/main/java/net/md_5/bungee/api/chat/TextComponent.java

@@ -2,6 +2,7 @@ package net.md_5.bungee.api.chat;
 
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.function.Consumer;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import lombok.AllArgsConstructor;
@@ -27,6 +28,41 @@ public final class TextComponent extends BaseComponent
      * @param message the text to convert
      * @return the components needed to print the message to the client
      */
+    public static BaseComponent fromLegacy(String message)
+    {
+        return fromLegacy( message, ChatColor.WHITE );
+    }
+
+    /**
+     * Converts the old formatting system that used
+     * {@link net.md_5.bungee.api.ChatColor#COLOR_CHAR} into the new json based
+     * system.
+     *
+     * @param message the text to convert
+     * @param defaultColor color to use when no formatting is to be applied
+     * (i.e. after ChatColor.RESET).
+     * @return the components needed to print the message to the client
+     */
+    public static BaseComponent fromLegacy(String message, ChatColor defaultColor)
+    {
+        ComponentBuilder componentBuilder = new ComponentBuilder();
+        populateComponentStructure( message, defaultColor, componentBuilder::append );
+        return componentBuilder.build();
+    }
+
+    /**
+     * Converts the old formatting system that used
+     * {@link net.md_5.bungee.api.ChatColor#COLOR_CHAR} into the new json based
+     * system.
+     *
+     * @param message the text to convert
+     * @return the components needed to print the message to the client
+     * @deprecated {@link #fromLegacy(String)} is preferred as it will
+     * consolidate all components into a single BaseComponent with extra
+     * contents as opposed to an array of components which is non-standard and
+     * may result in unexpected behavior.
+     */
+    @Deprecated
     public static BaseComponent[] fromLegacyText(String message)
     {
         return fromLegacyText( message, ChatColor.WHITE );
@@ -41,10 +77,21 @@ public final class TextComponent extends BaseComponent
      * @param defaultColor color to use when no formatting is to be applied
      * (i.e. after ChatColor.RESET).
      * @return the components needed to print the message to the client
+     * @deprecated {@link #fromLegacy(String, ChatColor)} is preferred as it
+     * will consolidate all components into a single BaseComponent with extra
+     * contents as opposed to an array of components which is non-standard and
+     * may result in unexpected behavior.
      */
+    @Deprecated
     public static BaseComponent[] fromLegacyText(String message, ChatColor defaultColor)
     {
         ArrayList<BaseComponent> components = new ArrayList<>();
+        populateComponentStructure( message, defaultColor, components::add );
+        return components.toArray( new BaseComponent[ 0 ] );
+    }
+
+    private static void populateComponentStructure(String message, ChatColor defaultColor, Consumer<BaseComponent> appender)
+    {
         StringBuilder builder = new StringBuilder();
         TextComponent component = new TextComponent();
         Matcher matcher = url.matcher( message );
@@ -94,7 +141,7 @@ public final class TextComponent extends BaseComponent
                     component = new TextComponent( old );
                     old.setText( builder.toString() );
                     builder = new StringBuilder();
-                    components.add( old );
+                    appender.accept( old );
                 }
                 if ( format == ChatColor.BOLD )
                 {
@@ -137,7 +184,7 @@ public final class TextComponent extends BaseComponent
                     component = new TextComponent( old );
                     old.setText( builder.toString() );
                     builder = new StringBuilder();
-                    components.add( old );
+                    appender.accept( old );
                 }
 
                 TextComponent old = component;
@@ -146,7 +193,7 @@ public final class TextComponent extends BaseComponent
                 component.setText( urlString );
                 component.setClickEvent( new ClickEvent( ClickEvent.Action.OPEN_URL,
                         urlString.startsWith( "http" ) ? urlString : "http://" + urlString ) );
-                components.add( component );
+                appender.accept( component );
                 i += pos - i - 1;
                 component = old;
                 continue;
@@ -155,9 +202,29 @@ public final class TextComponent extends BaseComponent
         }
 
         component.setText( builder.toString() );
-        components.add( component );
+        appender.accept( component );
+    }
 
-        return components.toArray( new BaseComponent[ 0 ] );
+    /**
+     * Internal compatibility method to transform an array of components to a
+     * single component.
+     *
+     * @param components array
+     * @return single component
+     */
+    public static BaseComponent fromArray(BaseComponent... components)
+    {
+        if ( components == null )
+        {
+            return null;
+        }
+
+        if ( components.length == 1 )
+        {
+            return components[0];
+        }
+
+        return new TextComponent( components );
     }
 
     /**

chat/src/main/java/net/md_5/bungee/api/chat/TranslatableComponent.java

@@ -86,6 +86,21 @@ public final class TranslatableComponent extends BaseComponent
         }
     }
 
+    /**
+     * Creates a translatable component with the passed substitutions
+     *
+     * @param translatable the translatable object
+     * @param with the {@link java.lang.String}s and
+     * {@link net.md_5.bungee.api.chat.BaseComponent}s to use into the
+     * translation
+     * @see #translate
+     * @see #setWith(java.util.List)
+     */
+    public TranslatableComponent(TranslationProvider translatable, Object... with)
+    {
+        this( translatable.getTranslationKey(), with );
+    }
+
     /**
      * Creates a duplicate of this TranslatableComponent.
      *

chat/src/main/java/net/md_5/bungee/api/chat/TranslationProvider.java

@@ -0,0 +1,38 @@
+package net.md_5.bungee.api.chat;
+
+/**
+ * An object capable of being translated by the client in a
+ * {@link TranslatableComponent}.
+ */
+public interface TranslationProvider
+{
+
+    /**
+     * Get the translation key.
+     *
+     * @return the translation key
+     */
+    String getTranslationKey();
+
+    /**
+     * Get this translatable object as a {@link TranslatableComponent}.
+     *
+     * @return the translatable component
+     */
+    default TranslatableComponent asTranslatableComponent()
+    {
+        return asTranslatableComponent( (Object[]) null );
+    }
+
+    /**
+     * Get this translatable object as a {@link TranslatableComponent}.
+     *
+     * @param with the {@link String Strings} and
+     * {@link BaseComponent BaseComponents} to use in the translation
+     * @return the translatable component
+     */
+    default TranslatableComponent asTranslatableComponent(Object... with)
+    {
+        return new TranslatableComponent( this, with );
+    }
+}

chat/src/main/java/net/md_5/bungee/api/chat/hover/content/Text.java

@@ -26,7 +26,10 @@ public class Text extends Content
     public Text(BaseComponent value)
     {
         // For legacy serialization reasons, this has to be an array of components
-        this( new BaseComponent[]{value} );
+        this( new BaseComponent[]
+        {
+            value
+        } );
     }
 
     public Text(String value)

chat/src/main/java/net/md_5/bungee/chat/BaseComponentSerializer.java

@@ -5,6 +5,7 @@ import com.google.gson.JsonDeserializationContext;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonParseException;
+import com.google.gson.JsonPrimitive;
 import com.google.gson.JsonSerializationContext;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -20,27 +21,51 @@ import net.md_5.bungee.api.chat.hover.content.Content;
 public class BaseComponentSerializer
 {
 
+    private static boolean getAsBoolean(JsonElement el)
+    {
+        if ( el.isJsonPrimitive() )
+        {
+            JsonPrimitive primitive = (JsonPrimitive) el;
+
+            if ( primitive.isBoolean() )
+            {
+                return primitive.getAsBoolean();
+            }
+
+            if ( primitive.isNumber() )
+            {
+                Number number = primitive.getAsNumber();
+                if ( number instanceof Byte )
+                {
+                    return number.byteValue() != 0;
+                }
+            }
+        }
+
+        return false;
+    }
+
     protected void deserialize(JsonObject object, BaseComponent component, JsonDeserializationContext context)
     {
         if ( object.has( "bold" ) )
         {
-            component.setBold( object.get( "bold" ).getAsBoolean() );
+            component.setBold( getAsBoolean( object.get( "bold" ) ) );
         }
         if ( object.has( "italic" ) )
         {
-            component.setItalic( object.get( "italic" ).getAsBoolean() );
+            component.setItalic( getAsBoolean( object.get( "italic" ) ) );
         }
         if ( object.has( "underlined" ) )
         {
-            component.setUnderlined( object.get( "underlined" ).getAsBoolean() );
+            component.setUnderlined( getAsBoolean( object.get( "underlined" ) ) );
         }
         if ( object.has( "strikethrough" ) )
         {
-            component.setStrikethrough( object.get( "strikethrough" ).getAsBoolean() );
+            component.setStrikethrough( getAsBoolean( object.get( "strikethrough" ) ) );
         }
         if ( object.has( "obfuscated" ) )
         {
-            component.setObfuscated( object.get( "obfuscated" ).getAsBoolean() );
+            component.setObfuscated( getAsBoolean( object.get( "obfuscated" ) ) );
         }
         if ( object.has( "color" ) )
         {

chat/src/main/java/net/md_5/bungee/chat/ComponentSerializer.java

@@ -2,12 +2,14 @@ package net.md_5.bungee.chat;
 
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
+import com.google.gson.JsonArray;
 import com.google.gson.JsonDeserializationContext;
 import com.google.gson.JsonDeserializer;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonParseException;
 import com.google.gson.JsonParser;
+import com.google.gson.JsonPrimitive;
 import java.lang.reflect.Type;
 import java.util.Set;
 import net.md_5.bungee.api.chat.BaseComponent;
@@ -44,16 +46,17 @@ public class ComponentSerializer implements JsonDeserializer<BaseComponent>
 
     /**
      * Parse a JSON-compliant String as an array of base components. The input
-     * can be one of either an array of components, or a single component object.
-     * If the input is an array, each component will be parsed individually and
-     * returned in the order that they were parsed. If the input is a single
-     * component object, a single-valued array with the component will be returned.
+     * can be one of either an array of components, or a single component
+     * object. If the input is an array, each component will be parsed
+     * individually and returned in the order that they were parsed. If the
+     * input is a single component object, a single-valued array with the
+     * component will be returned.
      * <p>
-     * <strong>NOTE:</strong> {@link #deserialize(String)} is preferred as it will
-     * parse only one component as opposed to an array of components which is non-
-     * standard behavior. This method is still appropriate for parsing multiple
-     * components at once, although such use case is rarely (if at all) exhibited
-     * in vanilla Minecraft.
+     * <strong>NOTE:</strong> {@link #deserialize(String)} is preferred as it
+     * will parse only one component as opposed to an array of components which
+     * is non- standard behavior. This method is still appropriate for parsing
+     * multiple components at once, although such use case is rarely (if at all)
+     * exhibited in vanilla Minecraft.
      *
      * @param json the component json to parse
      * @return an array of all parsed components
@@ -75,25 +78,51 @@ public class ComponentSerializer implements JsonDeserializer<BaseComponent>
     }
 
     /**
-     * Deserialize a JSON-compliant String as a single component. The input is
-     * expected to be a JSON object that represents only one component.
+     * Deserialize a JSON-compliant String as a single component.
      *
      * @param json the component json to parse
      * @return the deserialized component
-     * @throws IllegalArgumentException if anything other than a JSON object is
-     * passed as input
+     * @throws IllegalArgumentException if anything other than a valid JSON
+     * component string is passed as input
      */
     public static BaseComponent deserialize(String json)
     {
         JsonElement jsonElement = JsonParser.parseString( json );
-        if ( !jsonElement.isJsonObject() )
+
+        return deserialize( jsonElement );
+    }
+
+    /**
+     * Deserialize a JSON element as a single component.
+     *
+     * @param jsonElement the component json to parse
+     * @return the deserialized component
+     * @throws IllegalArgumentException if anything other than a valid JSON
+     * component is passed as input
+     */
+    public static BaseComponent deserialize(JsonElement jsonElement)
     {
-            throw new IllegalArgumentException( "Malformatted JSON. Expected object, got array for input \"" + json + "\"." );
+        if ( jsonElement instanceof JsonPrimitive )
+        {
+            JsonPrimitive primitive = (JsonPrimitive) jsonElement;
+            if ( primitive.isString() )
+            {
+                return new TextComponent( primitive.getAsString() );
+            }
+        } else if ( jsonElement instanceof JsonArray )
+        {
+            BaseComponent[] array = gson.fromJson( jsonElement, BaseComponent[].class );
+            return TextComponent.fromArray( array );
         }
 
         return gson.fromJson( jsonElement, BaseComponent.class );
     }
 
+    public static JsonElement toJson(BaseComponent component)
+    {
+        return gson.toJsonTree( component );
+    }
+
     public static String toString(Object object)
     {
         return gson.toJson( object );

chat/src/main/java/net/md_5/bungee/chat/TextComponentSerializer.java

@@ -18,11 +18,10 @@ public class TextComponentSerializer extends BaseComponentSerializer implements
     {
         TextComponent component = new TextComponent();
         JsonObject object = json.getAsJsonObject();
-        if ( !object.has( "text" ) )
+        if ( object.has( "text" ) )
         {
-            throw new JsonParseException( "Could not parse JSON: missing 'text' property" );
-        }
             component.setText( object.get( "text" ).getAsString() );
+        }
         deserialize( object, component, context );
         return component;
     }

chat/src/main/java/net/md_5/bungee/chat/TranslationRegistry.java

@@ -1,11 +1,11 @@
 package net.md_5.bungee.chat;
 
-import com.google.common.base.Charsets;
 import com.google.gson.Gson;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 import java.io.IOException;
 import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
 import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.List;
@@ -102,7 +102,7 @@ public final class TranslationRegistry
 
         public JsonProvider(String resourcePath) throws IOException
         {
-            try ( InputStreamReader rd = new InputStreamReader( JsonProvider.class.getResourceAsStream( resourcePath ), Charsets.UTF_8 ) )
+            try ( InputStreamReader rd = new InputStreamReader( JsonProvider.class.getResourceAsStream( resourcePath ), StandardCharsets.UTF_8 ) )
             {
                 JsonObject obj = new Gson().fromJson( rd, JsonObject.class );
                 for ( Map.Entry<String, JsonElement> entries : obj.entrySet() )

chat/src/test/java/net/md_5/bungee/api/chat/ComponentsTest.java

@@ -8,7 +8,6 @@ import java.util.function.Function;
 import java.util.function.ObjIntConsumer;
 import java.util.function.Supplier;
 import net.md_5.bungee.api.ChatColor;
-import net.md_5.bungee.api.chat.hover.content.Item;
 import net.md_5.bungee.api.chat.hover.content.Text;
 import net.md_5.bungee.chat.ComponentSerializer;
 import org.junit.jupiter.api.Test;
@@ -72,6 +71,8 @@ public class ComponentsTest
         assertEquals( hoverVal, ComponentSerializer.toString( (BaseComponent[]) contentText.getValue() ) );
         testDissembleReassemble( components );
         //////////
+        // TODO: now ambiguous since "text" to distinguish Text from Item is not required
+        /*
         TextComponent component1 = new TextComponent( "HoverableText" );
         String nbt = "{display:{Name:{text:Hello},Lore:[{text:Line_1},{text:Line_2}]},ench:[{id:49,lvl:5}],Unbreakable:1}}";
         Item contentItem = new Item( "minecraft:wood", 1, ItemTag.ofNbt( nbt ) );
@@ -84,6 +85,7 @@ public class ComponentsTest
         assertEquals( contentItem.getCount(), parsedContentItem.getCount() );
         assertEquals( contentItem.getId(), parsedContentItem.getId() );
         assertEquals( nbt, parsedContentItem.getTag().getNbt() );
+         */
     }
 
     @Test
@@ -561,8 +563,7 @@ public class ComponentsTest
         this.testBuilder(
                 ComponentBuilder::create,
                 BaseComponent::toPlainText,
-                ChatColor.RED + "Hello " + ChatColor.BLUE + ChatColor.BOLD
-                    + "World" + ChatColor.YELLOW + ChatColor.BOLD + "!",
+                ChatColor.RED + "Hello " + ChatColor.BLUE + ChatColor.BOLD + "World" + ChatColor.YELLOW + ChatColor.BOLD + "!",
                 BaseComponent::toLegacyText
         );
     }
@@ -574,8 +575,7 @@ public class ComponentsTest
                 ComponentBuilder::build,
                 (component) -> BaseComponent.toPlainText( component ),
                 // An extra format code is appended to the beginning because there is an empty TextComponent at the start of every component
-                ChatColor.WHITE.toString() + ChatColor.RED + "Hello " + ChatColor.BLUE + ChatColor.BOLD
-                    + "World" + ChatColor.YELLOW + ChatColor.BOLD + "!",
+                ChatColor.WHITE.toString() + ChatColor.RED + "Hello " + ChatColor.BLUE + ChatColor.BOLD + "World" + ChatColor.YELLOW + ChatColor.BOLD + "!",
                 (component) -> BaseComponent.toLegacyText( component )
         );
     }

config/src/main/java/net/md_5/bungee/config/JsonConfiguration.java

@@ -1,6 +1,5 @@
 package net.md_5.bungee.config;
 
-import com.google.common.base.Charsets;
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
 import com.google.gson.JsonElement;
@@ -16,6 +15,7 @@ import java.io.OutputStreamWriter;
 import java.io.Reader;
 import java.io.Writer;
 import java.lang.reflect.Type;
+import java.nio.charset.StandardCharsets;
 import java.util.LinkedHashMap;
 import java.util.Map;
 import lombok.AccessLevel;
@@ -37,7 +37,7 @@ public class JsonConfiguration extends ConfigurationProvider
     @Override
     public void save(Configuration config, File file) throws IOException
     {
-        try ( Writer writer = new OutputStreamWriter( new FileOutputStream( file ), Charsets.UTF_8 ) )
+        try ( Writer writer = new OutputStreamWriter( new FileOutputStream( file ), StandardCharsets.UTF_8 ) )
         {
             save( config, writer );
         }
@@ -91,7 +91,7 @@ public class JsonConfiguration extends ConfigurationProvider
     @Override
     public Configuration load(InputStream is, Configuration defaults)
     {
-        return load( new InputStreamReader( is, Charsets.UTF_8 ), defaults );
+        return load( new InputStreamReader( is, StandardCharsets.UTF_8 ), defaults );
     }
 
     @Override

config/src/main/java/net/md_5/bungee/config/YamlConfiguration.java

@@ -1,6 +1,5 @@
 package net.md_5.bungee.config;
 
-import com.google.common.base.Charsets;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
@@ -9,6 +8,7 @@ import java.io.InputStream;
 import java.io.OutputStreamWriter;
 import java.io.Reader;
 import java.io.Writer;
+import java.nio.charset.StandardCharsets;
 import java.util.LinkedHashMap;
 import java.util.Map;
 import lombok.AccessLevel;
@@ -54,7 +54,7 @@ public class YamlConfiguration extends ConfigurationProvider
     @Override
     public void save(Configuration config, File file) throws IOException
     {
-        try ( Writer writer = new OutputStreamWriter( new FileOutputStream( file ), Charsets.UTF_8 ) )
+        try ( Writer writer = new OutputStreamWriter( new FileOutputStream( file ), StandardCharsets.UTF_8 ) )
         {
             save( config, writer );
         }

log/src/main/java/net/md_5/bungee/log/LoggingOutputStream.java

@@ -1,8 +1,8 @@
 package net.md_5.bungee.log;
 
-import com.google.common.base.Charsets;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import lombok.RequiredArgsConstructor;
@@ -19,7 +19,7 @@ public class LoggingOutputStream extends ByteArrayOutputStream
     @Override
     public void flush() throws IOException
     {
-        String contents = toString( Charsets.UTF_8.name() );
+        String contents = toString( StandardCharsets.UTF_8.name() );
         super.reset();
         if ( !contents.isEmpty() && !contents.equals( separator ) )
         {

pom.xml

@@ -82,7 +82,7 @@
             <dependency>
                 <groupId>io.netty</groupId>
                 <artifactId>netty-bom</artifactId>
-                <version>4.1.99.Final</version>
+                <version>4.1.100.Final</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
@@ -92,7 +92,7 @@
         <dependency>
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter</artifactId>
-            <version>5.10.0</version>
+            <version>5.10.1</version>
             <scope>test</scope>
         </dependency>
         <dependency>
@@ -121,7 +121,7 @@
                 <plugin>
                     <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-javadoc-plugin</artifactId>
-                    <version>3.6.0</version>
+                    <version>3.6.2</version>
                 </plugin>
             </plugins>
         </pluginManagement>
@@ -150,7 +150,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-checkstyle-plugin</artifactId>
-                <version>3.3.0</version>
+                <version>3.3.1</version>
                 <executions>
                     <execution>
                         <phase>process-classes</phase>

protocol/pom.xml

@@ -17,26 +17,20 @@
     <name>BungeeCord-Protocol</name>
     <description>Minimal implementation of the Minecraft protocol for use in BungeeCord</description>
 
-    <!-- We really shouldn't depend on external repositories, but at least this is the Central staging one -->
+    <!-- We really shouldn't depend on external repositories -->
     <repositories>
         <repository>
-            <id>sonatype-nexus-snapshots</id>
-            <name>Sonatype Nexus Snapshots</name>
-            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
-            <releases>
-                <enabled>false</enabled>
-            </releases>
-            <snapshots>
-                <enabled>true</enabled>
-            </snapshots>
+            <id>minecraft-libraries</id>
+            <name>Minecraft Libraries</name>
+            <url>https://libraries.minecraft.net/</url>
         </repository>
     </repositories>
 
     <dependencies>
         <dependency>
-            <groupId>net.md-5</groupId>
+            <groupId>com.mojang</groupId>
             <artifactId>brigadier</artifactId>
-            <version>1.0.16-SNAPSHOT</version>
+            <version>1.2.9</version>
             <scope>compile</scope>
         </dependency>
         <dependency>

protocol/src/main/java/net/md_5/bungee/protocol/AbstractPacketHandler.java

@@ -34,6 +34,7 @@ import net.md_5.bungee.protocol.packet.Respawn;
 import net.md_5.bungee.protocol.packet.ScoreboardDisplay;
 import net.md_5.bungee.protocol.packet.ScoreboardObjective;
 import net.md_5.bungee.protocol.packet.ScoreboardScore;
+import net.md_5.bungee.protocol.packet.ScoreboardScoreReset;
 import net.md_5.bungee.protocol.packet.ServerData;
 import net.md_5.bungee.protocol.packet.SetCompression;
 import net.md_5.bungee.protocol.packet.StartConfiguration;
@@ -143,6 +144,10 @@ public abstract class AbstractPacketHandler
     {
     }
 
+    public void handle(ScoreboardScoreReset scoreboardScoreReset) throws Exception
+    {
+    }
+
     public void handle(EncryptionRequest encryptionRequest) throws Exception
     {
     }

protocol/src/main/java/net/md_5/bungee/protocol/DefinedPacket.java

@@ -1,20 +1,25 @@
 package net.md_5.bungee.protocol;
 
-import com.google.common.base.Charsets;
+import com.google.common.base.Function;
 import com.google.common.base.Preconditions;
+import com.google.gson.JsonElement;
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.ByteBufInputStream;
 import io.netty.buffer.ByteBufOutputStream;
 import java.io.DataInputStream;
 import java.io.DataOutputStream;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.BitSet;
 import java.util.EnumSet;
 import java.util.List;
 import java.util.UUID;
+import java.util.function.BiConsumer;
 import lombok.RequiredArgsConstructor;
+import net.md_5.bungee.api.chat.BaseComponent;
+import net.md_5.bungee.chat.ComponentSerializer;
 import se.llbit.nbt.ErrorTag;
 import se.llbit.nbt.NamedTag;
 import se.llbit.nbt.SpecificTag;
@@ -24,6 +29,23 @@ import se.llbit.nbt.Tag;
 public abstract class DefinedPacket
 {
 
+    public <T> T readNullable(Function<ByteBuf, T> reader, ByteBuf buf)
+    {
+        return buf.readBoolean() ? reader.apply( buf ) : null;
+    }
+
+    public <T> void writeNullable(T t0, BiConsumer<T, ByteBuf> writer, ByteBuf buf)
+    {
+        if ( t0 != null )
+        {
+            buf.writeBoolean( true );
+            writer.accept( t0, buf );
+        } else
+        {
+            buf.writeBoolean( false );
+        }
+    }
+
     public static void writeString(String s, ByteBuf buf)
     {
         writeString( s, buf, Short.MAX_VALUE );
@@ -36,7 +58,7 @@ public abstract class DefinedPacket
             throw new OverflowPacketException( "Cannot send string longer than " + maxLength + " (got " + s.length() + " characters)" );
         }
 
-        byte[] b = s.getBytes( Charsets.UTF_8 );
+        byte[] b = s.getBytes( StandardCharsets.UTF_8 );
         if ( b.length > maxLength * 3 )
         {
             throw new OverflowPacketException( "Cannot send string longer than " + ( maxLength * 3 ) + " (got " + b.length + " bytes)" );
@@ -59,7 +81,7 @@ public abstract class DefinedPacket
             throw new OverflowPacketException( "Cannot receive string longer than " + maxLen * 3 + " (got " + len + " bytes)" );
         }
 
-        String s = buf.toString( buf.readerIndex(), len, Charsets.UTF_8 );
+        String s = buf.toString( buf.readerIndex(), len, StandardCharsets.UTF_8 );
         buf.readerIndex( buf.readerIndex() + len );
 
         if ( s.length() > maxLen )
@@ -70,6 +92,59 @@ public abstract class DefinedPacket
         return s;
     }
 
+    public static Either<String, BaseComponent> readEitherBaseComponent(ByteBuf buf, int protocolVersion, boolean string)
+    {
+        return ( string ) ? Either.left( readString( buf ) ) : Either.right( readBaseComponent( buf, protocolVersion ) );
+    }
+
+    public static BaseComponent readBaseComponent(ByteBuf buf, int protocolVersion)
+    {
+        return readBaseComponent( buf, Short.MAX_VALUE, protocolVersion );
+    }
+
+    public static BaseComponent readBaseComponent(ByteBuf buf, int maxStringLength, int protocolVersion)
+    {
+        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_20_3 )
+        {
+            SpecificTag nbt = (SpecificTag) readTag( buf, protocolVersion );
+            JsonElement json = TagUtil.toJson( nbt );
+
+            return ComponentSerializer.deserialize( json );
+        } else
+        {
+            String string = readString( buf, maxStringLength );
+
+            return ComponentSerializer.deserialize( string );
+        }
+    }
+
+    public static void writeEitherBaseComponent(Either<String, BaseComponent> message, ByteBuf buf, int protocolVersion)
+    {
+        if ( message.isLeft() )
+        {
+            writeString( message.getLeft(), buf );
+        } else
+        {
+            writeBaseComponent( message.getRight(), buf, protocolVersion );
+        }
+    }
+
+    public static void writeBaseComponent(BaseComponent message, ByteBuf buf, int protocolVersion)
+    {
+        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_20_3 )
+        {
+            JsonElement json = ComponentSerializer.toJson( message );
+            SpecificTag nbt = TagUtil.fromJson( json );
+
+            writeTag( nbt, buf, protocolVersion );
+        } else
+        {
+            String string = ComponentSerializer.toString( message );
+
+            writeString( string, buf );
+        }
+    }
+
     public static void writeArray(byte[] b, ByteBuf buf)
     {
         if ( b.length > Short.MAX_VALUE )
@@ -295,6 +370,38 @@ public abstract class DefinedPacket
         return null;
     }
 
+    public static void writeNumberFormat(NumberFormat format, ByteBuf buf, int protocolVersion)
+    {
+        writeVarInt( format.getType().ordinal(), buf );
+        switch ( format.getType() )
+        {
+            case BLANK:
+                break;
+            case STYLED:
+                writeBaseComponent( (BaseComponent) format.getValue(), buf, protocolVersion ); // TODO: style
+                break;
+            case FIXED:
+                writeBaseComponent( (BaseComponent) format.getValue(), buf, protocolVersion );
+                break;
+        }
+    }
+
+    public static NumberFormat readNumberFormat(ByteBuf buf, int protocolVersion)
+    {
+        int format = readVarInt( buf );
+        switch ( format )
+        {
+            case 0:
+                return new NumberFormat( NumberFormat.Type.BLANK, null );
+            case 1:
+                return new NumberFormat( NumberFormat.Type.STYLED, readBaseComponent( buf, protocolVersion ) ); // TODO: style
+            case 2:
+                return new NumberFormat( NumberFormat.Type.FIXED, readBaseComponent( buf, protocolVersion ) );
+            default:
+                throw new IllegalArgumentException( "Unknown number format " + format );
+        }
+    }
+
     public static Tag readTag(ByteBuf input, int protocolVersion)
     {
         DataInputStream in = new DataInputStream( new ByteBufInputStream( input ) );
@@ -325,9 +432,18 @@ public abstract class DefinedPacket
 
     public static void writeTag(Tag tag, ByteBuf output, int protocolVersion)
     {
+        DataOutputStream out = new DataOutputStream( new ByteBufOutputStream( output ) );
         try
         {
-            tag.write( new DataOutputStream( new ByteBufOutputStream( output ) ) );
+            if ( tag instanceof SpecificTag )
+            {
+                SpecificTag specificTag = (SpecificTag) tag;
+                specificTag.writeType( out );
+                specificTag.write( out );
+            } else
+            {
+                tag.write( out );
+            }
         } catch ( IOException ex )
         {
             throw new RuntimeException( "Exception writing tag", ex );
@@ -386,6 +502,11 @@ public abstract class DefinedPacket
         throw new UnsupportedOperationException( "Packet must implement read method" );
     }
 
+    public void read(ByteBuf buf, Protocol protocol, ProtocolConstants.Direction direction, int protocolVersion)
+    {
+        read( buf, direction, protocolVersion );
+    }
+
     public void read(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
     {
         read( buf );
@@ -396,6 +517,11 @@ public abstract class DefinedPacket
         throw new UnsupportedOperationException( "Packet must implement write method" );
     }
 
+    public void write(ByteBuf buf, Protocol protocol, ProtocolConstants.Direction direction, int protocolVersion)
+    {
+        write( buf, direction, protocolVersion );
+    }
+
     public void write(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
     {
         write( buf );

protocol/src/main/java/net/md_5/bungee/protocol/Either.java

@@ -0,0 +1,34 @@
+package net.md_5.bungee.protocol;
+
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
+public final class Either<L, R>
+{
+
+    private final L left;
+    private final R right;
+
+    public boolean isLeft()
+    {
+        return this.left != null;
+    }
+
+    public boolean isRight()
+    {
+        return this.right != null;
+    }
+
+    public static <L, R> Either<L, R> left(L left)
+    {
+        return new Either<>( left, null );
+    }
+
+    public static <L, R> Either<L, R> right(R right)
+    {
+        return new Either<>( null, right );
+    }
+}

protocol/src/main/java/net/md_5/bungee/protocol/MinecraftDecoder.java

@@ -39,7 +39,7 @@ public class MinecraftDecoder extends MessageToMessageDecoder<ByteBuf>
             DefinedPacket packet = prot.createPacket( packetId, protocolVersion );
             if ( packet != null )
             {
-                packet.read( in, prot.getDirection(), protocolVersion );
+                packet.read( in, protocol, prot.getDirection(), protocolVersion );
 
                 if ( in.isReadable() )
                 {

protocol/src/main/java/net/md_5/bungee/protocol/MinecraftEncoder.java

@@ -24,6 +24,6 @@ public class MinecraftEncoder extends MessageToByteEncoder<DefinedPacket>
     {
         Protocol.DirectionData prot = ( server ) ? protocol.TO_CLIENT : protocol.TO_SERVER;
         DefinedPacket.writeVarInt( prot.getId( msg.getClass(), protocolVersion ), out );
-        msg.write( out, prot.getDirection(), protocolVersion );
+        msg.write( out, protocol, prot.getDirection(), protocolVersion );
     }
 }

protocol/src/main/java/net/md_5/bungee/protocol/NumberFormat.java

@@ -0,0 +1,18 @@
+package net.md_5.bungee.protocol;
+
+import lombok.Data;
+
+@Data
+public class NumberFormat
+{
+
+    private final Type type;
+    private final Object value;
+
+    public enum Type
+    {
+        BLANK,
+        STYLED,
+        FIXED;
+    }
+}

protocol/src/main/java/net/md_5/bungee/protocol/Protocol.java

@@ -40,6 +40,7 @@ import net.md_5.bungee.protocol.packet.Respawn;
 import net.md_5.bungee.protocol.packet.ScoreboardDisplay;
 import net.md_5.bungee.protocol.packet.ScoreboardObjective;
 import net.md_5.bungee.protocol.packet.ScoreboardScore;
+import net.md_5.bungee.protocol.packet.ScoreboardScoreReset;
 import net.md_5.bungee.protocol.packet.ServerData;
 import net.md_5.bungee.protocol.packet.SetCompression;
 import net.md_5.bungee.protocol.packet.StartConfiguration;
@@ -134,7 +135,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_19_1, 0x3E ),
                     map( ProtocolConstants.MINECRAFT_1_19_3, 0x3D ),
                     map( ProtocolConstants.MINECRAFT_1_19_4, 0x41 ),
-                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x43 )
+                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x43 ),
+                    map( ProtocolConstants.MINECRAFT_1_20_3, 0x45 )
             );
             TO_CLIENT.registerPacket(
                     BossBar.class,
@@ -192,7 +194,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_19_1, 0x56 ),
                     map( ProtocolConstants.MINECRAFT_1_19_3, 0x54 ),
                     map( ProtocolConstants.MINECRAFT_1_19_4, 0x58 ),
-                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x5A )
+                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x5A ),
+                    map( ProtocolConstants.MINECRAFT_1_20_3, 0x5C )
             );
             TO_CLIENT.registerPacket(
                     ScoreboardScore.class,
@@ -208,7 +211,13 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_19_1, 0x59 ),
                     map( ProtocolConstants.MINECRAFT_1_19_3, 0x57 ),
                     map( ProtocolConstants.MINECRAFT_1_19_4, 0x5B ),
-                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x5D )
+                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x5D ),
+                    map( ProtocolConstants.MINECRAFT_1_20_3, 0x5F )
+            );
+            TO_CLIENT.registerPacket(
+                    ScoreboardScoreReset.class,
+                    ScoreboardScoreReset::new,
+                    map( ProtocolConstants.MINECRAFT_1_20_3, 0x42 )
             );
             TO_CLIENT.registerPacket(
                     ScoreboardDisplay.class,
@@ -224,7 +233,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_19_1, 0x4F ),
                     map( ProtocolConstants.MINECRAFT_1_19_3, 0x4D ),
                     map( ProtocolConstants.MINECRAFT_1_19_4, 0x51 ),
-                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x53 )
+                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x53 ),
+                    map( ProtocolConstants.MINECRAFT_1_20_3, 0x55 )
             );
             TO_CLIENT.registerPacket(
                     Team.class,
@@ -240,7 +250,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_19_1, 0x58 ),
                     map( ProtocolConstants.MINECRAFT_1_19_3, 0x56 ),
                     map( ProtocolConstants.MINECRAFT_1_19_4, 0x5A ),
-                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x5C )
+                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x5C ),
+                    map( ProtocolConstants.MINECRAFT_1_20_3, 0x5E )
             );
             TO_CLIENT.registerPacket(
                     PluginMessage.class,
@@ -291,7 +302,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_19_1, 0x5D ),
                     map( ProtocolConstants.MINECRAFT_1_19_3, 0x5B ),
                     map( ProtocolConstants.MINECRAFT_1_19_4, 0x5F ),
-                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x61 )
+                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x61 ),
+                    map( ProtocolConstants.MINECRAFT_1_20_3, 0x63 )
             );
             TO_CLIENT.registerPacket(
                     ClearTitles.class,
@@ -310,7 +322,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_19_1, 0x5B ),
                     map( ProtocolConstants.MINECRAFT_1_19_3, 0x59 ),
                     map( ProtocolConstants.MINECRAFT_1_19_4, 0x5D ),
-                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x5F )
+                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x5F ),
+                    map( ProtocolConstants.MINECRAFT_1_20_3, 0x61 )
             );
             TO_CLIENT.registerPacket(
                     TitleTimes.class,
@@ -320,7 +333,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_19_1, 0x5E ),
                     map( ProtocolConstants.MINECRAFT_1_19_3, 0x5C ),
                     map( ProtocolConstants.MINECRAFT_1_19_4, 0x60 ),
-                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x62 )
+                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x62 ),
+                    map( ProtocolConstants.MINECRAFT_1_20_3, 0x64 )
             );
             TO_CLIENT.registerPacket(
                     SystemChat.class,
@@ -329,7 +343,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_19_1, 0x62 ),
                     map( ProtocolConstants.MINECRAFT_1_19_3, 0x60 ),
                     map( ProtocolConstants.MINECRAFT_1_19_4, 0x64 ),
-                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x67 )
+                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x67 ),
+                    map( ProtocolConstants.MINECRAFT_1_20_3, 0x69 )
             );
             TO_CLIENT.registerPacket(
                     PlayerListHeaderFooter.class,
@@ -349,7 +364,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_19_1, 0x63 ),
                     map( ProtocolConstants.MINECRAFT_1_19_3, 0x61 ),
                     map( ProtocolConstants.MINECRAFT_1_19_4, 0x65 ),
-                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x68 )
+                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x68 ),
+                    map( ProtocolConstants.MINECRAFT_1_20_3, 0x6A )
             );
             TO_CLIENT.registerPacket(
                     EntityStatus.class,
@@ -405,7 +421,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_19_1, 0x4C ),
                     map( ProtocolConstants.MINECRAFT_1_19_3, 0x4B ),
                     map( ProtocolConstants.MINECRAFT_1_19_4, 0x4F ),
-                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x51 )
+                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x51 ),
+                    map( ProtocolConstants.MINECRAFT_1_20_3, 0x53 )
             );
             TO_CLIENT.registerPacket(
                     ServerData.class,
@@ -414,7 +431,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_19_1, 0x42 ),
                     map( ProtocolConstants.MINECRAFT_1_19_3, 0x41 ),
                     map( ProtocolConstants.MINECRAFT_1_19_4, 0x45 ),
-                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x47 )
+                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x47 ),
+                    map( ProtocolConstants.MINECRAFT_1_20_3, 0x49 )
             );
             TO_CLIENT.registerPacket(
                     PlayerListItemRemove.class,
@@ -433,7 +451,8 @@ public enum Protocol
             TO_CLIENT.registerPacket(
                     StartConfiguration.class,
                     StartConfiguration::new,
-                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x65 )
+                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x65 ),
+                    map( ProtocolConstants.MINECRAFT_1_20_3, 0x67 )
             );
 
             TO_SERVER.registerPacket(
@@ -451,7 +470,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_19_1, 0x12 ),
                     map( ProtocolConstants.MINECRAFT_1_19_3, 0x11 ),
                     map( ProtocolConstants.MINECRAFT_1_19_4, 0x12 ),
-                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x14 )
+                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x14 ),
+                    map( ProtocolConstants.MINECRAFT_1_20_3, 0x15 )
             );
             TO_SERVER.registerPacket( Chat.class,
                     Chat::new,
@@ -517,7 +537,8 @@ public enum Protocol
                     map( ProtocolConstants.MINECRAFT_1_19_1, 0x0D ),
                     map( ProtocolConstants.MINECRAFT_1_19_3, 0x0C ),
                     map( ProtocolConstants.MINECRAFT_1_19_4, 0x0D ),
-                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x0F )
+                    map( ProtocolConstants.MINECRAFT_1_20_2, 0x0F ),
+                    map( ProtocolConstants.MINECRAFT_1_20_3, 0x10 )
             );
             TO_SERVER.registerPacket(
                     StartConfiguration.class,

protocol/src/main/java/net/md_5/bungee/protocol/ProtocolConstants.java

@@ -44,6 +44,7 @@ public class ProtocolConstants
     public static final int MINECRAFT_1_19_4 = 762;
     public static final int MINECRAFT_1_20 = 763;
     public static final int MINECRAFT_1_20_2 = 764;
+    public static final int MINECRAFT_1_20_3 = 765;
     public static final List<String> SUPPORTED_VERSIONS;
     public static final List<Integer> SUPPORTED_VERSION_IDS;
 
@@ -101,13 +102,14 @@ public class ProtocolConstants
                 ProtocolConstants.MINECRAFT_1_19_3,
                 ProtocolConstants.MINECRAFT_1_19_4,
                 ProtocolConstants.MINECRAFT_1_20,
-                ProtocolConstants.MINECRAFT_1_20_2
+                ProtocolConstants.MINECRAFT_1_20_2,
+                ProtocolConstants.MINECRAFT_1_20_3
         );
 
         if ( SNAPSHOT_SUPPORT )
         {
             // supportedVersions.add( "1.20.x" );
-            // supportedVersionIds.add( ProtocolConstants.MINECRAFT_1_20_2 );
+            // supportedVersionIds.add( ProtocolConstants.MINECRAFT_1_20_3 );
         }
 
         SUPPORTED_VERSIONS = supportedVersions.build();

protocol/src/main/java/net/md_5/bungee/protocol/TagUtil.java

@@ -0,0 +1,218 @@
+package net.md_5.bungee.protocol;
+
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonNull;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonPrimitive;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+import se.llbit.nbt.ByteArrayTag;
+import se.llbit.nbt.ByteTag;
+import se.llbit.nbt.CompoundTag;
+import se.llbit.nbt.DoubleTag;
+import se.llbit.nbt.FloatTag;
+import se.llbit.nbt.IntArrayTag;
+import se.llbit.nbt.IntTag;
+import se.llbit.nbt.ListTag;
+import se.llbit.nbt.LongArrayTag;
+import se.llbit.nbt.LongTag;
+import se.llbit.nbt.NamedTag;
+import se.llbit.nbt.ShortTag;
+import se.llbit.nbt.SpecificTag;
+import se.llbit.nbt.StringTag;
+import se.llbit.nbt.Tag;
+
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public final class TagUtil
+{
+
+    public static SpecificTag fromJson(JsonElement json)
+    {
+        if ( json instanceof JsonPrimitive )
+        {
+            JsonPrimitive jsonPrimitive = (JsonPrimitive) json;
+            if ( jsonPrimitive.isNumber() )
+            {
+                Number number = json.getAsNumber();
+
+                if ( number instanceof Byte )
+                {
+                    return new ByteTag( (Byte) number );
+                } else if ( number instanceof Short )
+                {
+                    return new ShortTag( (Short) number );
+                } else if ( number instanceof Integer )
+                {
+                    return new IntTag( (Integer) number );
+                } else if ( number instanceof Long )
+                {
+                    return new LongTag( (Long) number );
+                } else if ( number instanceof Float )
+                {
+                    return new FloatTag( (Float) number );
+                } else if ( number instanceof Double )
+                {
+                    return new DoubleTag( (Double) number );
+                }
+            } else if ( jsonPrimitive.isString() )
+            {
+                return new StringTag( jsonPrimitive.getAsString() );
+            } else if ( jsonPrimitive.isBoolean() )
+            {
+                return new ByteTag( jsonPrimitive.getAsBoolean() ? 1 : 0 );
+            } else
+            {
+                throw new IllegalArgumentException( "Unknown JSON primitive: " + jsonPrimitive );
+            }
+        } else if ( json instanceof JsonObject )
+        {
+            CompoundTag compoundTag = new CompoundTag();
+            for ( Map.Entry<String, JsonElement> property : ( (JsonObject) json ).entrySet() )
+            {
+                compoundTag.add( property.getKey(), fromJson( property.getValue() ) );
+            }
+
+            return compoundTag;
+        } else if ( json instanceof JsonArray )
+        {
+            List<JsonElement> jsonArray = ( (JsonArray) json ).asList();
+
+            if ( jsonArray.isEmpty() )
+            {
+                return new ListTag( Tag.TAG_END, Collections.emptyList() );
+            }
+
+            SpecificTag listTag;
+            int listType = fromJson( jsonArray.get( 0 ) ).tagType();
+            switch ( listType )
+            {
+                case Tag.TAG_BYTE:
+                    byte[] bytes = new byte[ jsonArray.size() ];
+                    for ( int i = 0; i < bytes.length; i++ )
+                    {
+                        bytes[i] = (Byte) ( (JsonPrimitive) jsonArray.get( i ) ).getAsNumber();
+                    }
+
+                    listTag = new ByteArrayTag( bytes );
+                    break;
+                case Tag.TAG_INT:
+                    int[] ints = new int[ jsonArray.size() ];
+                    for ( int i = 0; i < ints.length; i++ )
+                    {
+                        ints[i] = (Integer) ( (JsonPrimitive) jsonArray.get( i ) ).getAsNumber();
+                    }
+
+                    listTag = new IntArrayTag( ints );
+                    break;
+                case Tag.TAG_LONG:
+                    long[] longs = new long[ jsonArray.size() ];
+                    for ( int i = 0; i < longs.length; i++ )
+                    {
+                        longs[i] = (Long) ( (JsonPrimitive) jsonArray.get( i ) ).getAsNumber();
+                    }
+
+                    listTag = new LongArrayTag( longs );
+                    break;
+                default:
+                    List<SpecificTag> tagItems = new ArrayList<>( jsonArray.size() );
+
+                    for ( JsonElement jsonEl : jsonArray )
+                    {
+                        SpecificTag subTag = fromJson( jsonEl );
+                        if ( subTag.tagType() != listType )
+                        {
+                            throw new IllegalArgumentException( "Cannot convert mixed JsonArray to Tag" );
+                        }
+
+                        tagItems.add( subTag );
+                    }
+
+                    listTag = new ListTag( listType, tagItems );
+                    break;
+            }
+
+            return listTag;
+        } else if ( json instanceof JsonNull )
+        {
+            return Tag.END;
+        }
+
+        throw new IllegalArgumentException( "Unknown JSON element: " + json );
+    }
+
+    public static JsonElement toJson(SpecificTag tag)
+    {
+        switch ( tag.tagType() )
+        {
+            case Tag.TAG_BYTE:
+                return new JsonPrimitive( (byte) ( (ByteTag) tag ).getData() );
+            case Tag.TAG_SHORT:
+                return new JsonPrimitive( ( (ShortTag) tag ).getData() );
+            case Tag.TAG_INT:
+                return new JsonPrimitive( ( (IntTag) tag ).getData() );
+            case Tag.TAG_LONG:
+                return new JsonPrimitive( ( (LongTag) tag ).getData() );
+            case Tag.TAG_FLOAT:
+                return new JsonPrimitive( ( (FloatTag) tag ).getData() );
+            case Tag.TAG_DOUBLE:
+                return new JsonPrimitive( ( (DoubleTag) tag ).getData() );
+            case Tag.TAG_BYTE_ARRAY:
+                byte[] byteArray = ( (ByteArrayTag) tag ).getData();
+
+                JsonArray jsonByteArray = new JsonArray( byteArray.length );
+                for ( byte b : byteArray )
+                {
+                    jsonByteArray.add( new JsonPrimitive( b ) );
+                }
+
+                return jsonByteArray;
+            case Tag.TAG_STRING:
+                return new JsonPrimitive( ( (StringTag) tag ).getData() );
+            case Tag.TAG_LIST:
+                List<SpecificTag> items = ( (ListTag) tag ).items;
+
+                JsonArray jsonList = new JsonArray( items.size() );
+                for ( SpecificTag subTag : items )
+                {
+                    jsonList.add( toJson( subTag ) );
+                }
+
+                return jsonList;
+            case Tag.TAG_COMPOUND:
+                JsonObject jsonObject = new JsonObject();
+                for ( NamedTag subTag : (CompoundTag) tag )
+                {
+                    jsonObject.add( subTag.name(), toJson( subTag.getTag() ) );
+                }
+
+                return jsonObject;
+            case Tag.TAG_INT_ARRAY:
+                int[] intArray = ( (IntArrayTag) tag ).getData();
+
+                JsonArray jsonIntArray = new JsonArray( intArray.length );
+                for ( int i : intArray )
+                {
+                    jsonIntArray.add( new JsonPrimitive( i ) );
+                }
+
+                return jsonIntArray;
+            case Tag.TAG_LONG_ARRAY:
+                long[] longArray = ( (LongArrayTag) tag ).getData();
+
+                JsonArray jsonLongArray = new JsonArray( longArray.length );
+                for ( long l : longArray )
+                {
+                    jsonLongArray.add( new JsonPrimitive( l ) );
+                }
+
+                return jsonLongArray;
+            default:
+                throw new IllegalArgumentException( "Unknown NBT tag: " + tag );
+        }
+    }
+}

protocol/src/main/java/net/md_5/bungee/protocol/Varint21LengthFieldExtraBufPrepender.java

@@ -7,7 +7,8 @@ import io.netty.handler.codec.MessageToMessageEncoder;
 import java.util.List;
 
 /**
- * Prepend length of the message as a Varint21 using an extra buffer for the length, avoiding copying packet data
+ * Prepend length of the message as a Varint21 using an extra buffer for the
+ * length, avoiding copying packet data
  */
 @ChannelHandler.Sharable
 public class Varint21LengthFieldExtraBufPrepender extends MessageToMessageEncoder<ByteBuf>

protocol/src/main/java/net/md_5/bungee/protocol/Varint21LengthFieldPrepender.java

@@ -6,7 +6,8 @@ import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.MessageToByteEncoder;
 
 /**
- * Prepend length of the message as a Varint21 by writing length and data to a new buffer
+ * Prepend length of the message as a Varint21 by writing length and data to a
+ * new buffer
  */
 @ChannelHandler.Sharable
 public class Varint21LengthFieldPrepender extends MessageToByteEncoder<ByteBuf>

protocol/src/main/java/net/md_5/bungee/protocol/packet/BossBar.java

@@ -5,6 +5,7 @@ import java.util.UUID;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
+import net.md_5.bungee.api.chat.BaseComponent;
 import net.md_5.bungee.protocol.AbstractPacketHandler;
 import net.md_5.bungee.protocol.DefinedPacket;
 import net.md_5.bungee.protocol.ProtocolConstants;
@@ -17,7 +18,7 @@ public class BossBar extends DefinedPacket
 
     private UUID uuid;
     private int action;
-    private String title;
+    private BaseComponent title;
     private float health;
     private int color;
     private int division;
@@ -39,7 +40,7 @@ public class BossBar extends DefinedPacket
         {
             // Add
             case 0:
-                title = readString( buf );
+                title = readBaseComponent( buf, protocolVersion );
                 health = buf.readFloat();
                 color = readVarInt( buf );
                 division = readVarInt( buf );
@@ -51,7 +52,7 @@ public class BossBar extends DefinedPacket
                 break;
             // Title
             case 3:
-                title = readString( buf );
+                title = readBaseComponent( buf, protocolVersion );
                 break;
             // Style
             case 4:
@@ -75,7 +76,7 @@ public class BossBar extends DefinedPacket
         {
             // Add
             case 0:
-                writeString( title, buf );
+                writeBaseComponent( title, buf, protocolVersion );
                 buf.writeFloat( health );
                 writeVarInt( color, buf );
                 writeVarInt( division, buf );
@@ -87,7 +88,7 @@ public class BossBar extends DefinedPacket
                 break;
             // Title
             case 3:
-                writeString( title, buf );
+                writeBaseComponent( title, buf, protocolVersion );
                 break;
             // Style
             case 4:

protocol/src/main/java/net/md_5/bungee/protocol/packet/Commands.java

@@ -311,6 +311,7 @@ public class Commands extends DefinedPacket
         private static final ArgumentSerializer[] IDS_1_19;
         private static final ArgumentSerializer[] IDS_1_19_3;
         private static final ArgumentSerializer[] IDS_1_19_4;
+        private static final ArgumentSerializer[] IDS_1_20_3;
         private static final Map<Class<?>, ProperArgumentSerializer<?>> PROPER_PROVIDERS = new HashMap<>();
         //
         private static final ArgumentSerializer<Void> VOID = new ArgumentSerializer<Void>()
@@ -813,6 +814,60 @@ public class Commands extends DefinedPacket
                 get( "minecraft:uuid", VOID ),
                 get( "minecraft:heightmap", VOID )
             };
+
+            IDS_1_20_3 = new ArgumentSerializer[]
+            {
+                get( "brigadier:bool", VOID ),
+                get( "brigadier:float", FLOAT_RANGE ),
+                get( "brigadier:double", DOUBLE_RANGE ),
+                get( "brigadier:integer", INTEGER_RANGE ),
+                get( "brigadier:long", LONG_RANGE ),
+                get( "brigadier:string", STRING ),
+                get( "minecraft:entity", BYTE ),
+                get( "minecraft:game_profile", VOID ),
+                get( "minecraft:block_pos", VOID ),
+                get( "minecraft:column_pos", VOID ),
+                get( "minecraft:vec3", VOID ),
+                get( "minecraft:vec2", VOID ),
+                get( "minecraft:block_state", VOID ),
+                get( "minecraft:block_predicate", VOID ),
+                get( "minecraft:item_stack", VOID ),
+                get( "minecraft:item_predicate", VOID ),
+                get( "minecraft:color", VOID ),
+                get( "minecraft:component", VOID ),
+                get( "minecraft:style", VOID ),
+                get( "minecraft:message", VOID ),
+                get( "minecraft:nbt_compound_tag", VOID ),
+                get( "minecraft:nbt_tag", VOID ),
+                get( "minecraft:nbt_path", VOID ),
+                get( "minecraft:objective", VOID ),
+                get( "minecraft:objective_criteria", VOID ),
+                get( "minecraft:operation", VOID ),
+                get( "minecraft:particle", VOID ),
+                get( "minecraft:angle", VOID ),
+                get( "minecraft:rotation", VOID ),
+                get( "minecraft:scoreboard_slot", VOID ),
+                get( "minecraft:score_holder", BYTE ),
+                get( "minecraft:swizzle", VOID ),
+                get( "minecraft:team", VOID ),
+                get( "minecraft:item_slot", VOID ),
+                get( "minecraft:resource_location", VOID ),
+                get( "minecraft:function", VOID ),
+                get( "minecraft:entity_anchor", VOID ),
+                get( "minecraft:int_range", VOID ),
+                get( "minecraft:float_range", VOID ),
+                get( "minecraft:dimension", VOID ),
+                get( "minecraft:gamemode", VOID ),
+                get( "minecraft:time", INTEGER ),
+                get( "minecraft:resource_or_tag", RAW_STRING ),
+                get( "minecraft:resource_or_tag_key", RAW_STRING ),
+                get( "minecraft:resource", RAW_STRING ),
+                get( "minecraft:resource_key", RAW_STRING ),
+                get( "minecraft:template_mirror", VOID ),
+                get( "minecraft:template_rotation", VOID ),
+                get( "minecraft:uuid", VOID ),
+                get( "minecraft:heightmap", VOID )
+            };
         }
 
         private static void register(String name, ArgumentSerializer serializer)
@@ -1232,7 +1287,10 @@ public class Commands extends DefinedPacket
             {
                 key = readVarInt( buf );
 
-                if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_4 )
+                if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_20_3 )
+                {
+                    reader = IDS_1_20_3[(Integer) key];
+                } else if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_4 )
                 {
                     reader = IDS_1_19_4[(Integer) key];
                 } else if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_3 )

protocol/src/main/java/net/md_5/bungee/protocol/packet/Kick.java

@@ -5,8 +5,12 @@ import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
+import net.md_5.bungee.api.chat.BaseComponent;
+import net.md_5.bungee.chat.ComponentSerializer;
 import net.md_5.bungee.protocol.AbstractPacketHandler;
 import net.md_5.bungee.protocol.DefinedPacket;
+import net.md_5.bungee.protocol.Protocol;
+import net.md_5.bungee.protocol.ProtocolConstants;
 
 @Data
 @NoArgsConstructor
@@ -15,18 +19,30 @@ import net.md_5.bungee.protocol.DefinedPacket;
 public class Kick extends DefinedPacket
 {
 
-    private String message;
+    private BaseComponent message;
 
     @Override
-    public void read(ByteBuf buf)
+    public void read(ByteBuf buf, Protocol protocol, ProtocolConstants.Direction direction, int protocolVersion)
     {
-        message = readString( buf );
+        if ( protocol == Protocol.LOGIN )
+        {
+            message = ComponentSerializer.deserialize( readString( buf ) );
+        } else
+        {
+            message = readBaseComponent( buf, protocolVersion );
+        }
     }
 
     @Override
-    public void write(ByteBuf buf)
+    public void write(ByteBuf buf, Protocol protocol, ProtocolConstants.Direction direction, int protocolVersion)
     {
-        writeString( message, buf );
+        if ( protocol == Protocol.LOGIN )
+        {
+            writeString( ComponentSerializer.toString( message ), buf );
+        } else
+        {
+            writeBaseComponent( message, buf, protocolVersion );
+        }
     }
 
     @Override

protocol/src/main/java/net/md_5/bungee/protocol/packet/PlayerListHeaderFooter.java

@@ -5,6 +5,7 @@ import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
+import net.md_5.bungee.api.chat.BaseComponent;
 import net.md_5.bungee.protocol.AbstractPacketHandler;
 import net.md_5.bungee.protocol.DefinedPacket;
 import net.md_5.bungee.protocol.ProtocolConstants;
@@ -16,21 +17,21 @@ import net.md_5.bungee.protocol.ProtocolConstants;
 public class PlayerListHeaderFooter extends DefinedPacket
 {
 
-    private String header;
-    private String footer;
+    private BaseComponent header;
+    private BaseComponent footer;
 
     @Override
     public void read(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
     {
-        header = readString( buf );
-        footer = readString( buf );
+        header = readBaseComponent( buf, protocolVersion );
+        footer = readBaseComponent( buf, protocolVersion );
     }
 
     @Override
     public void write(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
     {
-        writeString( header, buf );
-        writeString( footer, buf );
+        writeBaseComponent( header, buf, protocolVersion );
+        writeBaseComponent( footer, buf, protocolVersion );
     }
 
     @Override

protocol/src/main/java/net/md_5/bungee/protocol/packet/PlayerListItem.java

@@ -5,6 +5,7 @@ import java.util.UUID;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
+import net.md_5.bungee.api.chat.BaseComponent;
 import net.md_5.bungee.protocol.AbstractPacketHandler;
 import net.md_5.bungee.protocol.DefinedPacket;
 import net.md_5.bungee.protocol.PlayerPublicKey;
@@ -38,7 +39,7 @@ public class PlayerListItem extends DefinedPacket
                     item.ping = DefinedPacket.readVarInt( buf );
                     if ( buf.readBoolean() )
                     {
-                        item.displayName = DefinedPacket.readString( buf );
+                        item.displayName = DefinedPacket.readBaseComponent( buf, protocolVersion );
                     }
                     if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19 )
                     {
@@ -54,7 +55,7 @@ public class PlayerListItem extends DefinedPacket
                 case UPDATE_DISPLAY_NAME:
                     if ( buf.readBoolean() )
                     {
-                        item.displayName = DefinedPacket.readString( buf );
+                        item.displayName = DefinedPacket.readBaseComponent( buf, protocolVersion );
                     }
             }
         }
@@ -78,7 +79,7 @@ public class PlayerListItem extends DefinedPacket
                     buf.writeBoolean( item.displayName != null );
                     if ( item.displayName != null )
                     {
-                        DefinedPacket.writeString( item.displayName, buf );
+                        DefinedPacket.writeBaseComponent( item.displayName, buf, protocolVersion );
                     }
                     if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19 )
                     {
@@ -95,7 +96,7 @@ public class PlayerListItem extends DefinedPacket
                     buf.writeBoolean( item.displayName != null );
                     if ( item.displayName != null )
                     {
-                        DefinedPacket.writeString( item.displayName, buf );
+                        DefinedPacket.writeBaseComponent( item.displayName, buf, protocolVersion );
                     }
                     break;
             }
@@ -142,7 +143,7 @@ public class PlayerListItem extends DefinedPacket
         Integer ping;
 
         // ADD_PLAYER & UPDATE_DISPLAY_NAME
-        String displayName;
+        BaseComponent displayName;
 
     }
 }

protocol/src/main/java/net/md_5/bungee/protocol/packet/PlayerListItemUpdate.java

@@ -58,7 +58,7 @@ public class PlayerListItemUpdate extends DefinedPacket
                     case UPDATE_DISPLAY_NAME:
                         if ( buf.readBoolean() )
                         {
-                            item.displayName = DefinedPacket.readString( buf );
+                            item.displayName = DefinedPacket.readBaseComponent( buf, protocolVersion );
                         }
                         break;
                 }
@@ -106,7 +106,7 @@ public class PlayerListItemUpdate extends DefinedPacket
                         buf.writeBoolean( item.displayName != null );
                         if ( item.displayName != null )
                         {
-                            DefinedPacket.writeString( item.displayName, buf );
+                            DefinedPacket.writeBaseComponent( item.displayName, buf, protocolVersion );
                         }
                         break;
                 }

protocol/src/main/java/net/md_5/bungee/protocol/packet/ScoreboardObjective.java

@@ -6,8 +6,11 @@ import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
+import net.md_5.bungee.api.chat.BaseComponent;
 import net.md_5.bungee.protocol.AbstractPacketHandler;
 import net.md_5.bungee.protocol.DefinedPacket;
+import net.md_5.bungee.protocol.Either;
+import net.md_5.bungee.protocol.NumberFormat;
 import net.md_5.bungee.protocol.ProtocolConstants;
 
 @Data
@@ -18,12 +21,13 @@ public class ScoreboardObjective extends DefinedPacket
 {
 
     private String name;
-    private String value;
+    private Either<String, BaseComponent> value;
     private HealthDisplay type;
     /**
      * 0 to create, 1 to remove, 2 to update display text.
      */
     private byte action;
+    private NumberFormat numberFormat;
 
     @Override
     public void read(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
@@ -32,14 +36,19 @@ public class ScoreboardObjective extends DefinedPacket
         action = buf.readByte();
         if ( action == 0 || action == 2 )
         {
-            value = readString( buf );
             if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_13 )
             {
+                value = readEitherBaseComponent( buf, protocolVersion, false );
                 type = HealthDisplay.values()[readVarInt( buf )];
             } else
             {
+                value = readEitherBaseComponent( buf, protocolVersion, true );
                 type = HealthDisplay.fromString( readString( buf ) );
             }
+            if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_20_3 )
+            {
+                numberFormat = readNullable( (b) -> readNumberFormat( b, protocolVersion ), buf );
+            }
         }
     }
 
@@ -50,7 +59,7 @@ public class ScoreboardObjective extends DefinedPacket
         buf.writeByte( action );
         if ( action == 0 || action == 2 )
         {
-            writeString( value, buf );
+            writeEitherBaseComponent( value, buf, protocolVersion );
             if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_13 )
             {
                 writeVarInt( type.ordinal(), buf );
@@ -58,6 +67,10 @@ public class ScoreboardObjective extends DefinedPacket
             {
                 writeString( type.toString(), buf );
             }
+            if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_20_3 )
+            {
+                writeNullable( numberFormat, (s, b) -> DefinedPacket.writeNumberFormat( s, b, protocolVersion ), buf );
+            }
         }
     }
 

protocol/src/main/java/net/md_5/bungee/protocol/packet/ScoreboardScore.java

@@ -5,8 +5,10 @@ import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
+import net.md_5.bungee.api.chat.BaseComponent;
 import net.md_5.bungee.protocol.AbstractPacketHandler;
 import net.md_5.bungee.protocol.DefinedPacket;
+import net.md_5.bungee.protocol.NumberFormat;
 import net.md_5.bungee.protocol.ProtocolConstants;
 
 @Data
@@ -23,29 +25,50 @@ public class ScoreboardScore extends DefinedPacket
     private byte action;
     private String scoreName;
     private int value;
+    private BaseComponent displayName;
+    private NumberFormat numberFormat;
 
     @Override
     public void read(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
     {
         itemName = readString( buf );
+        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_20_3 )
+        {
+            action = 0;
+        } else
+        {
             action = buf.readByte();
+        }
         scoreName = readString( buf );
         if ( action != 1 )
         {
             value = readVarInt( buf );
         }
+        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_20_3 )
+        {
+            displayName = readNullable( (b) -> readBaseComponent( b, protocolVersion ), buf );
+            numberFormat = readNullable( (b) -> readNumberFormat( b, protocolVersion ), buf );
+        }
     }
 
     @Override
     public void write(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
     {
         writeString( itemName, buf );
+        if ( protocolVersion < ProtocolConstants.MINECRAFT_1_20_3 )
+        {
             buf.writeByte( action );
+        }
         writeString( scoreName, buf );
-        if ( action != 1 )
+        if ( action != 1 || protocolVersion >= ProtocolConstants.MINECRAFT_1_20_3 )
         {
             writeVarInt( value, buf );
         }
+        if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_20_3 )
+        {
+            writeNullable( displayName, (s, b) -> DefinedPacket.writeBaseComponent( s, b, protocolVersion ), buf );
+            writeNullable( numberFormat, (s, b) -> DefinedPacket.writeNumberFormat( s, b, protocolVersion ), buf );
+        }
     }
 
     @Override

protocol/src/main/java/net/md_5/bungee/protocol/packet/ScoreboardScoreReset.java

@@ -0,0 +1,41 @@
+package net.md_5.bungee.protocol.packet;
+
+import io.netty.buffer.ByteBuf;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.NoArgsConstructor;
+import net.md_5.bungee.protocol.AbstractPacketHandler;
+import net.md_5.bungee.protocol.DefinedPacket;
+import net.md_5.bungee.protocol.ProtocolConstants;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@EqualsAndHashCode(callSuper = false)
+public class ScoreboardScoreReset extends DefinedPacket
+{
+
+    private String itemName;
+    private String scoreName;
+
+    @Override
+    public void read(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
+    {
+        itemName = readString( buf );
+        scoreName = readNullable( DefinedPacket::readString, buf );
+    }
+
+    @Override
+    public void write(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
+    {
+        writeString( itemName, buf );
+        writeNullable( scoreName, DefinedPacket::writeString, buf );
+    }
+
+    @Override
+    public void handle(AbstractPacketHandler handler) throws Exception
+    {
+        handler.handle( this );
+    }
+}

protocol/src/main/java/net/md_5/bungee/protocol/packet/ServerData.java

@@ -5,6 +5,7 @@ import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
+import net.md_5.bungee.api.chat.BaseComponent;
 import net.md_5.bungee.protocol.AbstractPacketHandler;
 import net.md_5.bungee.protocol.DefinedPacket;
 import net.md_5.bungee.protocol.ProtocolConstants;
@@ -16,7 +17,7 @@ import net.md_5.bungee.protocol.ProtocolConstants;
 public class ServerData extends DefinedPacket
 {
 
-    private String motd;
+    private BaseComponent motd;
     private Object icon;
     private boolean preview;
     private boolean enforceSecure;
@@ -26,7 +27,7 @@ public class ServerData extends DefinedPacket
     {
         if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_4 || buf.readBoolean() )
         {
-            motd = readString( buf, 262144 );
+            motd = readBaseComponent( buf, protocolVersion );
         }
         if ( buf.readBoolean() )
         {
@@ -59,7 +60,7 @@ public class ServerData extends DefinedPacket
             {
                 buf.writeBoolean( true );
             }
-            writeString( motd, buf, 262144 );
+            writeBaseComponent( motd, buf, protocolVersion );
         } else
         {
             if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_4 )

protocol/src/main/java/net/md_5/bungee/protocol/packet/Subtitle.java

@@ -4,6 +4,7 @@ import io.netty.buffer.ByteBuf;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
+import net.md_5.bungee.api.chat.BaseComponent;
 import net.md_5.bungee.protocol.AbstractPacketHandler;
 import net.md_5.bungee.protocol.DefinedPacket;
 import net.md_5.bungee.protocol.ProtocolConstants;
@@ -14,18 +15,18 @@ import net.md_5.bungee.protocol.ProtocolConstants;
 public class Subtitle extends DefinedPacket
 {
 
-    private String text;
+    private BaseComponent text;
 
     @Override
     public void read(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
     {
-        text = readString( buf );
+        text = readBaseComponent( buf, protocolVersion );
     }
 
     @Override
     public void write(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
     {
-        writeString( text, buf );
+        writeBaseComponent( text, buf, protocolVersion );
     }
 
     @Override

protocol/src/main/java/net/md_5/bungee/protocol/packet/SystemChat.java

@@ -6,6 +6,7 @@ import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
 import net.md_5.bungee.api.ChatMessageType;
+import net.md_5.bungee.api.chat.BaseComponent;
 import net.md_5.bungee.protocol.AbstractPacketHandler;
 import net.md_5.bungee.protocol.DefinedPacket;
 import net.md_5.bungee.protocol.ProtocolConstants;
@@ -17,20 +18,20 @@ import net.md_5.bungee.protocol.ProtocolConstants;
 public class SystemChat extends DefinedPacket
 {
 
-    private String message;
+    private BaseComponent message;
     private int position;
 
     @Override
     public void read(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
     {
-        message = readString( buf, 262144 );
+        message = readBaseComponent( buf, 262144, protocolVersion );
         position = ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_1 ) ? ( ( buf.readBoolean() ) ? ChatMessageType.ACTION_BAR.ordinal() : 0 ) : readVarInt( buf );
     }
 
     @Override
     public void write(ByteBuf buf, ProtocolConstants.Direction direction, int protocolVersion)
     {
-        writeString( message, buf, 262144 );
+        writeBaseComponent( message, buf, protocolVersion );
         if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_19_1 )
         {
             buf.writeBoolean( position == ChatMessageType.ACTION_BAR.ordinal() );

protocol/src/main/java/net/md_5/bungee/protocol/packet/TabCompleteResponse.java

@@ -1,6 +1,6 @@
 package net.md_5.bungee.protocol.packet;
 
-import com.mojang.brigadier.LiteralMessage;
+import com.mojang.brigadier.Message;
 import com.mojang.brigadier.context.StringRange;
 import com.mojang.brigadier.suggestion.Suggestion;
 import com.mojang.brigadier.suggestion.Suggestions;
@@ -10,6 +10,7 @@ import java.util.List;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
+import net.md_5.bungee.api.chat.BaseComponent;
 import net.md_5.bungee.protocol.AbstractPacketHandler;
 import net.md_5.bungee.protocol.DefinedPacket;
 import net.md_5.bungee.protocol.ProtocolConstants;
@@ -51,9 +52,9 @@ public class TabCompleteResponse extends DefinedPacket
             for ( int i = 0; i < cnt; i++ )
             {
                 String match = readString( buf );
-                String tooltip = buf.readBoolean() ? readString( buf ) : null;
+                BaseComponent tooltip = buf.readBoolean() ? readBaseComponent( buf, protocolVersion ) : null;
 
-                matches.add( new Suggestion( range, match, new LiteralMessage( tooltip ) ) );
+                matches.add( new Suggestion( range, match, ( tooltip != null ) ? new ComponentMessage( tooltip ) : null ) );
             }
 
             suggestions = new Suggestions( range, matches );
@@ -76,10 +77,10 @@ public class TabCompleteResponse extends DefinedPacket
             for ( Suggestion suggestion : suggestions.getList() )
             {
                 writeString( suggestion.getText(), buf );
-                buf.writeBoolean( suggestion.getTooltip() != null && suggestion.getTooltip().getString() != null );
-                if ( suggestion.getTooltip() != null && suggestion.getTooltip().getString() != null )
+                buf.writeBoolean( suggestion.getTooltip() != null );
+                if ( suggestion.getTooltip() != null )
                 {
-                    writeString( suggestion.getTooltip().getString(), buf );
+                    writeBaseComponent( ( (ComponentMessage) suggestion.getTooltip() ).getComponent(), buf, protocolVersion );
                 }
             }
         } else
@@ -93,4 +94,17 @@ public class TabCompleteResponse extends DefinedPacket
     {
         handler.handle( this );
     }
+
+    @Data
+    private static class ComponentMessage implements Message
+    {
+
+        private final BaseComponent component;
+
+        @Override
+        public String getString()
+        {
+            return component.toPlainText();
+        }
+    }
 }

protocol/src/main/java/net/md_5/bungee/protocol/packet/Team.java

@@ -5,8 +5,10 @@ import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
+import net.md_5.bungee.api.chat.BaseComponent;
 import net.md_5.bungee.protocol.AbstractPacketHandler;
 import net.md_5.bungee.protocol.DefinedPacket;
+import net.md_5.bungee.protocol.Either;
 import net.md_5.bungee.protocol.ProtocolConstants;
 
 @Data
@@ -21,9 +23,9 @@ public class Team extends DefinedPacket
      * 0 - create, 1 remove, 2 info update, 3 player add, 4 player remove.
      */
     private byte mode;
-    private String displayName;
-    private String prefix;
-    private String suffix;
+    private Either<String, BaseComponent> displayName;
+    private Either<String, BaseComponent> prefix;
+    private Either<String, BaseComponent> suffix;
     private String nameTagVisibility;
     private String collisionRule;
     private int color;
@@ -48,11 +50,14 @@ public class Team extends DefinedPacket
         mode = buf.readByte();
         if ( mode == 0 || mode == 2 )
         {
-            displayName = readString( buf );
             if ( protocolVersion < ProtocolConstants.MINECRAFT_1_13 )
             {
-                prefix = readString( buf );
-                suffix = readString( buf );
+                displayName = readEitherBaseComponent( buf, protocolVersion, true );
+                prefix = readEitherBaseComponent( buf, protocolVersion, true );
+                suffix = readEitherBaseComponent( buf, protocolVersion, true );
+            } else
+            {
+                displayName = readEitherBaseComponent( buf, protocolVersion, false );
             }
             friendlyFire = buf.readByte();
             nameTagVisibility = readString( buf );
@@ -63,8 +68,8 @@ public class Team extends DefinedPacket
             color = ( protocolVersion >= ProtocolConstants.MINECRAFT_1_13 ) ? readVarInt( buf ) : buf.readByte();
             if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_13 )
             {
-                prefix = readString( buf );
-                suffix = readString( buf );
+                prefix = readEitherBaseComponent( buf, protocolVersion, false );
+                suffix = readEitherBaseComponent( buf, protocolVersion, false );
             }
         }
         if ( mode == 0 || mode == 3 || mode == 4 )
@@ -85,11 +90,11 @@ public class Team extends DefinedPacket
         buf.writeByte( mode );
         if ( mode == 0 || mode == 2 )
         {
-            writeString( displayName, buf );
+            writeEitherBaseComponent( displayName, buf, protocolVersion );
             if ( protocolVersion < ProtocolConstants.MINECRAFT_1_13 )
             {
-                writeString( prefix, buf );
-                writeString( suffix, buf );
+                writeEitherBaseComponent( prefix, buf, protocolVersion );
+                writeEitherBaseComponent( suffix, buf, protocolVersion );
             }
             buf.writeByte( friendlyFire );
             writeString( nameTagVisibility, buf );
@@ -101,8 +106,8 @@ public class Team extends DefinedPacket
             if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_13 )
             {
                 writeVarInt( color, buf );
-                writeString( prefix, buf );
-                writeString( suffix, buf );
+                writeEitherBaseComponent( prefix, buf, protocolVersion );
+                writeEitherBaseComponent( suffix, buf, protocolVersion );
             } else
             {
                 buf.writeByte( color );

protocol/src/main/java/net/md_5/bungee/protocol/packet/Title.java

@@ -4,6 +4,7 @@ import io.netty.buffer.ByteBuf;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.NoArgsConstructor;
+import net.md_5.bungee.api.chat.BaseComponent;
 import net.md_5.bungee.protocol.AbstractPacketHandler;
 import net.md_5.bungee.protocol.DefinedPacket;
 import net.md_5.bungee.protocol.ProtocolConstants;
@@ -17,7 +18,7 @@ public class Title extends DefinedPacket
     private Action action;
 
     // TITLE & SUBTITLE
-    private String text;
+    private BaseComponent text;
 
     // TIMES
     private int fadeIn;
@@ -34,7 +35,7 @@ public class Title extends DefinedPacket
     {
         if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_17 )
         {
-            text = readString( buf );
+            text = readBaseComponent( buf, protocolVersion );
             return;
         }
 
@@ -52,7 +53,7 @@ public class Title extends DefinedPacket
             case TITLE:
             case SUBTITLE:
             case ACTIONBAR:
-                text = readString( buf );
+                text = readBaseComponent( buf, protocolVersion );
                 break;
             case TIMES:
                 fadeIn = buf.readInt();
@@ -67,7 +68,7 @@ public class Title extends DefinedPacket
     {
         if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_17 )
         {
-            writeString( text, buf );
+            writeBaseComponent( text, buf, protocolVersion );
             return;
         }
 
@@ -85,7 +86,7 @@ public class Title extends DefinedPacket
             case TITLE:
             case SUBTITLE:
             case ACTIONBAR:
-                writeString( text, buf );
+                writeBaseComponent( text, buf, protocolVersion );
                 break;
             case TIMES:
                 buf.writeInt( fadeIn );

proxy/src/main/java/net/md_5/bungee/BungeeCord.java

@@ -1,6 +1,5 @@
 package net.md_5.bungee;
 
-import com.google.common.base.Charsets;
 import com.google.common.base.Preconditions;
 import com.google.common.base.Predicate;
 import com.google.common.collect.Iterables;
@@ -24,6 +23,7 @@ import java.io.IOException;
 import java.io.PrintStream;
 import java.net.InetSocketAddress;
 import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
 import java.text.Format;
 import java.text.MessageFormat;
 import java.util.ArrayList;
@@ -685,10 +685,10 @@ public class BungeeCord extends ProxyServer
     {
         if ( protocolVersion >= ProtocolConstants.MINECRAFT_1_13 )
         {
-            return new PluginMessage( "minecraft:register", String.join( "\00", Iterables.transform( pluginChannels, PluginMessage.MODERNISE ) ).getBytes( Charsets.UTF_8 ), false );
+            return new PluginMessage( "minecraft:register", String.join( "\00", Iterables.transform( pluginChannels, PluginMessage.MODERNISE ) ).getBytes( StandardCharsets.UTF_8 ), false );
         }
 
-        return new PluginMessage( "REGISTER", String.join( "\00", pluginChannels ).getBytes( Charsets.UTF_8 ), false );
+        return new PluginMessage( "REGISTER", String.join( "\00", pluginChannels ).getBytes( StandardCharsets.UTF_8 ), false );
     }
 
     @Override
@@ -724,13 +724,13 @@ public class BungeeCord extends ProxyServer
     @Override
     public void broadcast(String message)
     {
-        broadcast( TextComponent.fromLegacyText( message ) );
+        broadcast( TextComponent.fromLegacy( message ) );
     }
 
     @Override
     public void broadcast(BaseComponent... message)
     {
-        getConsole().sendMessage( BaseComponent.toLegacyText( message ) );
+        getConsole().sendMessage( message );
         for ( ProxiedPlayer player : getPlayers() )
         {
             player.sendMessage( message );
@@ -740,14 +740,14 @@ public class BungeeCord extends ProxyServer
     @Override
     public void broadcast(BaseComponent message)
     {
-        getConsole().sendMessage( message.toLegacyText() );
+        getConsole().sendMessage( message );
         for ( ProxiedPlayer player : getPlayers() )
         {
             player.sendMessage( message );
         }
     }
 
-    public void addConnection(UserConnection con)
+    public boolean addConnection(UserConnection con)
     {
         UUID offlineId = con.getPendingConnection().getOfflineId();
         if ( offlineId != null && offlineId.version() != 3 )
@@ -757,6 +757,10 @@ public class BungeeCord extends ProxyServer
         connectionLock.writeLock().lock();
         try
         {
+            if ( connections.containsKey( con.getName() ) || connectionsByUUID.containsKey( con.getUniqueId() ) || connectionsByOfflineUUID.containsKey( offlineId ) )
+            {
+                return false;
+            }
             connections.put( con.getName(), con );
             connectionsByUUID.put( con.getUniqueId(), con );
             connectionsByOfflineUUID.put( offlineId, con );
@@ -764,6 +768,7 @@ public class BungeeCord extends ProxyServer
         {
             connectionLock.writeLock().unlock();
         }
+        return true;
     }
 
     public void removeConnection(UserConnection con)

proxy/src/main/java/net/md_5/bungee/BungeeTitle.java

@@ -3,8 +3,8 @@ package net.md_5.bungee;
 import lombok.Data;
 import net.md_5.bungee.api.Title;
 import net.md_5.bungee.api.chat.BaseComponent;
+import net.md_5.bungee.api.chat.TextComponent;
 import net.md_5.bungee.api.connection.ProxiedPlayer;
-import net.md_5.bungee.chat.ComponentSerializer;
 import net.md_5.bungee.protocol.DefinedPacket;
 import net.md_5.bungee.protocol.ProtocolConstants;
 import net.md_5.bungee.protocol.packet.ClearTitles;
@@ -53,21 +53,14 @@ public class BungeeTitle implements Title
             title = new TitlePacketHolder<>( packet, packet );
         }
 
-        title.oldPacket.setText( ComponentSerializer.toString( text ) ); // = newPacket
+        title.oldPacket.setText( text ); // = newPacket
         return this;
     }
 
     @Override
     public Title title(BaseComponent... text)
     {
-        if ( title == null )
-        {
-            net.md_5.bungee.protocol.packet.Title packet = new net.md_5.bungee.protocol.packet.Title( Action.TITLE );
-            title = new TitlePacketHolder<>( packet, packet );
-        }
-
-        title.oldPacket.setText( ComponentSerializer.toString( text ) ); // = newPacket
-        return this;
+        return title( TextComponent.fromArray( text ) );
     }
 
     @Override
@@ -78,24 +71,15 @@ public class BungeeTitle implements Title
             subtitle = new TitlePacketHolder<>( new net.md_5.bungee.protocol.packet.Title( Action.SUBTITLE ), new Subtitle() );
         }
 
-        String serialized = ComponentSerializer.toString( text );
-        subtitle.oldPacket.setText( serialized );
-        subtitle.newPacket.setText( serialized );
+        subtitle.oldPacket.setText( text );
+        subtitle.newPacket.setText( text );
         return this;
     }
 
     @Override
     public Title subTitle(BaseComponent... text)
     {
-        if ( subtitle == null )
-        {
-            subtitle = new TitlePacketHolder<>( new net.md_5.bungee.protocol.packet.Title( Action.SUBTITLE ), new Subtitle() );
-        }
-
-        String serialized = ComponentSerializer.toString( text );
-        subtitle.oldPacket.setText( serialized );
-        subtitle.newPacket.setText( serialized );
-        return this;
+        return subTitle( TextComponent.fromArray( text ) );
     }
 
     @Override

proxy/src/main/java/net/md_5/bungee/ServerConnector.java

@@ -14,6 +14,7 @@ import lombok.Getter;
 import lombok.RequiredArgsConstructor;
 import net.md_5.bungee.api.ChatColor;
 import net.md_5.bungee.api.ProxyServer;
+import net.md_5.bungee.api.chat.BaseComponent;
 import net.md_5.bungee.api.config.ServerInfo;
 import net.md_5.bungee.api.event.ServerConnectEvent;
 import net.md_5.bungee.api.event.ServerConnectedEvent;
@@ -34,6 +35,7 @@ import net.md_5.bungee.netty.ChannelWrapper;
 import net.md_5.bungee.netty.HandlerBoss;
 import net.md_5.bungee.netty.PacketHandler;
 import net.md_5.bungee.protocol.DefinedPacket;
+import net.md_5.bungee.protocol.Either;
 import net.md_5.bungee.protocol.PacketWrapper;
 import net.md_5.bungee.protocol.Protocol;
 import net.md_5.bungee.protocol.ProtocolConstants;
@@ -51,6 +53,7 @@ import net.md_5.bungee.protocol.packet.PluginMessage;
 import net.md_5.bungee.protocol.packet.Respawn;
 import net.md_5.bungee.protocol.packet.ScoreboardObjective;
 import net.md_5.bungee.protocol.packet.ScoreboardScore;
+import net.md_5.bungee.protocol.packet.ScoreboardScoreReset;
 import net.md_5.bungee.protocol.packet.SetCompression;
 import net.md_5.bungee.protocol.packet.StartConfiguration;
 import net.md_5.bungee.protocol.packet.ViewDistance;
@@ -278,11 +281,22 @@ public class ServerConnector extends PacketHandler
             Scoreboard serverScoreboard = user.getServerSentScoreboard();
             for ( Objective objective : serverScoreboard.getObjectives() )
             {
-                user.unsafe().sendPacket( new ScoreboardObjective( objective.getName(), objective.getValue(), ScoreboardObjective.HealthDisplay.fromString( objective.getType() ), (byte) 1 ) );
+                user.unsafe().sendPacket( new ScoreboardObjective(
+                        objective.getName(),
+                        ( user.getPendingConnection().getVersion() >= ProtocolConstants.MINECRAFT_1_13 ) ? Either.right( ComponentSerializer.deserialize( objective.getValue() ) ) : Either.left( objective.getValue() ),
+                        ScoreboardObjective.HealthDisplay.fromString( objective.getType() ),
+                        (byte) 1, null )
+                );
             }
             for ( Score score : serverScoreboard.getScores() )
             {
-                user.unsafe().sendPacket( new ScoreboardScore( score.getItemName(), (byte) 1, score.getScoreName(), score.getValue() ) );
+                if ( user.getPendingConnection().getVersion() >= ProtocolConstants.MINECRAFT_1_20_3 )
+                {
+                    user.unsafe().sendPacket( new ScoreboardScoreReset( score.getItemName(), null ) );
+                } else
+                {
+                    user.unsafe().sendPacket( new ScoreboardScore( score.getItemName(), (byte) 1, score.getScoreName(), score.getValue(), null, null ) );
+                }
             }
             for ( Team team : serverScoreboard.getTeams() )
             {
@@ -383,7 +397,10 @@ public class ServerConnector extends PacketHandler
     public void handle(Kick kick) throws Exception
     {
         ServerInfo def = user.updateAndGetNextServer( target );
-        ServerKickEvent event = new ServerKickEvent( user, target, ComponentSerializer.parse( kick.getMessage() ), def, ServerKickEvent.State.CONNECTING );
+        ServerKickEvent event = new ServerKickEvent( user, target, new BaseComponent[]
+        {
+            kick.getMessage()
+        }, def, ServerKickEvent.State.CONNECTING );
         if ( event.getKickReason().toLowerCase( Locale.ROOT ).contains( "outdated" ) && def != null )
         {
             // Pre cancel the event if we are going to try another server

proxy/src/main/java/net/md_5/bungee/UserConnection.java

@@ -153,7 +153,7 @@ public final class UserConnection implements ProxiedPlayer
         }
     };
 
-    public void init()
+    public boolean init()
     {
         this.entityRewrite = EntityMap.getEntityMap( getPendingConnection().getVersion() );
 
@@ -172,6 +172,8 @@ public final class UserConnection implements ProxiedPlayer
 
         // Set whether the connection has a 1.8 FML marker in the handshake.
         forgeClientHandler.setFmlTokenInHandshake( this.getPendingConnection().getExtraDataInHandshake().contains( ForgeConstants.FML_HANDSHAKE_TOKEN ) );
+
+        return BungeeCord.getInstance().addConnection( this );
     }
 
     public void sendPacket(PacketWrapper packet)
@@ -406,13 +408,13 @@ public final class UserConnection implements ProxiedPlayer
     @Override
     public void disconnect(String reason)
     {
-        disconnect0( TextComponent.fromLegacyText( reason ) );
+        disconnect( TextComponent.fromLegacy( reason ) );
     }
 
     @Override
     public void disconnect(BaseComponent... reason)
     {
-        disconnect0( reason );
+        disconnect( TextComponent.fromArray( reason ) );
     }
 
     @Override
@@ -421,7 +423,7 @@ public final class UserConnection implements ProxiedPlayer
         disconnect0( reason );
     }
 
-    public void disconnect0(final BaseComponent... reason)
+    public void disconnect0(final BaseComponent reason)
     {
         if ( !ch.isClosing() )
         {
@@ -430,7 +432,7 @@ public final class UserConnection implements ProxiedPlayer
                 getName(), BaseComponent.toLegacyText( reason )
             } );
 
-            ch.close( new Kick( ComponentSerializer.toString( reason ) ) );
+            ch.close( new Kick( reason ) );
 
             if ( server != null )
             {
@@ -454,7 +456,7 @@ public final class UserConnection implements ProxiedPlayer
     @Override
     public void sendMessage(String message)
     {
-        sendMessage( TextComponent.fromLegacyText( message ) );
+        sendMessage( TextComponent.fromLegacy( message ) );
     }
 
     @Override
@@ -481,7 +483,7 @@ public final class UserConnection implements ProxiedPlayer
     @Override
     public void sendMessage(ChatMessageType position, BaseComponent... message)
     {
-        sendMessage( position, null, message );
+        sendMessage( position, null, TextComponent.fromArray( message ) );
     }
 
     @Override
@@ -493,7 +495,7 @@ public final class UserConnection implements ProxiedPlayer
     @Override
     public void sendMessage(UUID sender, BaseComponent... message)
     {
-        sendMessage( ChatMessageType.CHAT, sender, message );
+        sendMessage( ChatMessageType.CHAT, sender, TextComponent.fromArray( message ) );
     }
 
     @Override
@@ -502,8 +504,28 @@ public final class UserConnection implements ProxiedPlayer
         sendMessage( ChatMessageType.CHAT, sender, message );
     }
 
-    private void sendMessage(ChatMessageType position, UUID sender, String message)
+    private void sendMessage(ChatMessageType position, UUID sender, BaseComponent message)
     {
+        // transform score components
+        message = ChatComponentTransformer.getInstance().transform( this, true, message );
+
+        if ( position == ChatMessageType.ACTION_BAR && getPendingConnection().getVersion() < ProtocolConstants.MINECRAFT_1_17 )
+        {
+            // Versions older than 1.11 cannot send the Action bar with the new JSON formattings
+            // Fix by converting to a legacy message, see https://bugs.mojang.com/browse/MC-119145
+            if ( getPendingConnection().getVersion() <= ProtocolConstants.MINECRAFT_1_10 )
+            {
+                message = new TextComponent( BaseComponent.toLegacyText( message ) );
+            } else
+            {
+                net.md_5.bungee.protocol.packet.Title title = new net.md_5.bungee.protocol.packet.Title();
+                title.setAction( net.md_5.bungee.protocol.packet.Title.Action.ACTIONBAR );
+                title.setText( message );
+                sendPacketQueued( title );
+                return;
+            }
+        }
+
         if ( getPendingConnection().getVersion() >= ProtocolConstants.MINECRAFT_1_19 )
         {
             // Align with Spigot and remove client side formatting for now
@@ -515,32 +537,7 @@ public final class UserConnection implements ProxiedPlayer
             sendPacketQueued( new SystemChat( message, position.ordinal() ) );
         } else
         {
-            sendPacketQueued( new Chat( message, (byte) position.ordinal(), sender ) );
-        }
-    }
-
-    private void sendMessage(ChatMessageType position, UUID sender, BaseComponent... message)
-    {
-        // transform score components
-        message = ChatComponentTransformer.getInstance().transform( this, true, message );
-
-        if ( position == ChatMessageType.ACTION_BAR && getPendingConnection().getVersion() < ProtocolConstants.MINECRAFT_1_17 )
-        {
-            // Versions older than 1.11 cannot send the Action bar with the new JSON formattings
-            // Fix by converting to a legacy message, see https://bugs.mojang.com/browse/MC-119145
-            if ( getPendingConnection().getVersion() <= ProtocolConstants.MINECRAFT_1_10 )
-            {
-                sendMessage( position, sender, ComponentSerializer.toString( new TextComponent( BaseComponent.toLegacyText( message ) ) ) );
-            } else
-            {
-                net.md_5.bungee.protocol.packet.Title title = new net.md_5.bungee.protocol.packet.Title();
-                title.setAction( net.md_5.bungee.protocol.packet.Title.Action.ACTIONBAR );
-                title.setText( ComponentSerializer.toString( message ) );
-                sendPacketQueued( title );
-            }
-        } else
-        {
-            sendMessage( position, sender, ComponentSerializer.toString( message ) );
+            sendPacketQueued( new Chat( ComponentSerializer.toString( message ), (byte) position.ordinal(), sender ) );
         }
     }
 
@@ -720,25 +717,19 @@ public final class UserConnection implements ProxiedPlayer
     @Override
     public void setTabHeader(BaseComponent header, BaseComponent footer)
     {
-        header = ChatComponentTransformer.getInstance().transform( this, true, header )[0];
-        footer = ChatComponentTransformer.getInstance().transform( this, true, footer )[0];
+        header = ChatComponentTransformer.getInstance().transform( this, true, header );
+        footer = ChatComponentTransformer.getInstance().transform( this, true, footer );
 
         sendPacketQueued( new PlayerListHeaderFooter(
-                ComponentSerializer.toString( header ),
-                ComponentSerializer.toString( footer )
+                header,
+                footer
         ) );
     }
 
     @Override
     public void setTabHeader(BaseComponent[] header, BaseComponent[] footer)
     {
-        header = ChatComponentTransformer.getInstance().transform( this, true, header );
-        footer = ChatComponentTransformer.getInstance().transform( this, true, footer );
-
-        sendPacketQueued( new PlayerListHeaderFooter(
-                ComponentSerializer.toString( header ),
-                ComponentSerializer.toString( footer )
-        ) );
+        setTabHeader( TextComponent.fromArray( header ), TextComponent.fromArray( footer ) );
     }
 
     @Override

proxy/src/main/java/net/md_5/bungee/conf/YamlConfig.java

@@ -1,6 +1,5 @@
 package net.md_5.bungee.conf;
 
-import com.google.common.base.Charsets;
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 import java.io.File;
 import java.io.FileInputStream;
@@ -10,6 +9,7 @@ import java.io.InputStream;
 import java.io.OutputStreamWriter;
 import java.io.Writer;
 import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
@@ -176,7 +176,7 @@ public class YamlConfig implements ConfigurationAdapter
     {
         try
         {
-            try ( Writer wr = new OutputStreamWriter( new FileOutputStream( file ), Charsets.UTF_8 ) )
+            try ( Writer wr = new OutputStreamWriter( new FileOutputStream( file ), StandardCharsets.UTF_8 ) )
             {
                 yaml.dump( config, wr );
             }

proxy/src/main/java/net/md_5/bungee/connection/DownstreamBridge.java

@@ -72,6 +72,7 @@ import net.md_5.bungee.protocol.packet.Respawn;
 import net.md_5.bungee.protocol.packet.ScoreboardDisplay;
 import net.md_5.bungee.protocol.packet.ScoreboardObjective;
 import net.md_5.bungee.protocol.packet.ScoreboardScore;
+import net.md_5.bungee.protocol.packet.ScoreboardScoreReset;
 import net.md_5.bungee.protocol.packet.ServerData;
 import net.md_5.bungee.protocol.packet.SetCompression;
 import net.md_5.bungee.protocol.packet.TabCompleteResponse;
@@ -188,7 +189,7 @@ public class DownstreamBridge extends PacketHandler
         switch ( objective.getAction() )
         {
             case 0:
-                serverScoreboard.addObjective( new Objective( objective.getName(), objective.getValue(), objective.getType().toString() ) );
+                serverScoreboard.addObjective( new Objective( objective.getName(), ( objective.getValue().isLeft() ) ? objective.getValue().getLeft() : ComponentSerializer.toString( objective.getValue().getRight() ), objective.getType().toString() ) );
                 break;
             case 1:
                 serverScoreboard.removeObjective( objective.getName() );
@@ -197,7 +198,7 @@ public class DownstreamBridge extends PacketHandler
                 Objective oldObjective = serverScoreboard.getObjective( objective.getName() );
                 if ( oldObjective != null )
                 {
-                    oldObjective.setValue( objective.getValue() );
+                    oldObjective.setValue( ( objective.getValue().isLeft() ) ? objective.getValue().getLeft() : ComponentSerializer.toString( objective.getValue().getRight() ) );
                     oldObjective.setType( objective.getType().toString() );
                 }
                 break;
@@ -225,6 +226,18 @@ public class DownstreamBridge extends PacketHandler
         }
     }
 
+    @Override
+    public void handle(ScoreboardScoreReset scoreboardScoreReset) throws Exception
+    {
+        Scoreboard serverScoreboard = con.getServerSentScoreboard();
+
+        // TODO: Expand score API to handle objective values. Shouldn't matter currently as only used for removing score entries.
+        if ( scoreboardScoreReset.getScoreName() == null )
+        {
+            serverScoreboard.removeScore( scoreboardScoreReset.getItemName() );
+        }
+    }
+
     @Override
     public void handle(ScoreboardDisplay displayScoreboard) throws Exception
     {
@@ -259,9 +272,9 @@ public class DownstreamBridge extends PacketHandler
         {
             if ( team.getMode() == 0 || team.getMode() == 2 )
             {
-                t.setDisplayName( team.getDisplayName() );
-                t.setPrefix( team.getPrefix() );
-                t.setSuffix( team.getSuffix() );
+                t.setDisplayName( ComponentSerializer.toString( team.getDisplayName() ) );
+                t.setPrefix( ComponentSerializer.toString( team.getPrefix() ) );
+                t.setSuffix( ComponentSerializer.toString( team.getSuffix() ) );
                 t.setFriendlyFire( team.getFriendlyFire() );
                 t.setNameTagVisibility( team.getNameTagVisibility() );
                 t.setCollisionRule( team.getCollisionRule() );
@@ -625,13 +638,16 @@ public class DownstreamBridge extends PacketHandler
     public void handle(Kick kick) throws Exception
     {
         ServerInfo def = con.updateAndGetNextServer( server.getInfo() );
-        ServerKickEvent event = bungee.getPluginManager().callEvent( new ServerKickEvent( con, server.getInfo(), ComponentSerializer.parse( kick.getMessage() ), def, ServerKickEvent.State.CONNECTED ) );
+        ServerKickEvent event = bungee.getPluginManager().callEvent( new ServerKickEvent( con, server.getInfo(), new BaseComponent[]
+        {
+            kick.getMessage()
+        }, def, ServerKickEvent.State.CONNECTED ) );
         if ( event.isCancelled() && event.getCancelServer() != null )
         {
             con.connectNow( event.getCancelServer(), ServerConnectEvent.Reason.KICK_REDIRECT );
         } else
         {
-            con.disconnect0( event.getKickReasonComponent() ); // TODO: Prefix our own stuff.
+            con.disconnect( event.getKickReasonComponent() ); // TODO: Prefix our own stuff.
         }
         server.setObsolete( true );
         throw CancelSendSignal.INSTANCE;

proxy/src/main/java/net/md_5/bungee/connection/InitialHandler.java

@@ -1,6 +1,5 @@
 package net.md_5.bungee.connection;
 
-import com.google.common.base.Charsets;
 import com.google.common.base.Preconditions;
 import com.google.gson.Gson;
 import java.math.BigInteger;
@@ -39,7 +38,6 @@ import net.md_5.bungee.api.event.PostLoginEvent;
 import net.md_5.bungee.api.event.PreLoginEvent;
 import net.md_5.bungee.api.event.ProxyPingEvent;
 import net.md_5.bungee.api.event.ServerConnectEvent;
-import net.md_5.bungee.chat.ComponentSerializer;
 import net.md_5.bungee.http.HttpClient;
 import net.md_5.bungee.jni.cipher.BungeeCipher;
 import net.md_5.bungee.netty.ChannelWrapper;
@@ -436,8 +434,8 @@ public class InitialHandler extends PacketHandler implements PendingConnection
             {
                 if ( result.isCancelled() )
                 {
-                    BaseComponent[] reason = result.getCancelReasonComponents();
-                    disconnect( ( reason != null ) ? reason : TextComponent.fromLegacyText( bungee.getTranslation( "kick_message" ) ) );
+                    BaseComponent reason = result.getReason();
+                    disconnect( ( reason != null ) ? reason : TextComponent.fromLegacy( bungee.getTranslation( "kick_message" ) ) );
                     return;
                 }
                 if ( ch.isClosed() )
@@ -605,8 +603,8 @@ public class InitialHandler extends PacketHandler implements PendingConnection
             {
                 if ( result.isCancelled() )
                 {
-                    BaseComponent[] reason = result.getCancelReasonComponents();
-                    disconnect( ( reason != null ) ? reason : TextComponent.fromLegacyText( bungee.getTranslation( "kick_message" ) ) );
+                    BaseComponent reason = result.getReason();
+                    disconnect( ( reason != null ) ? reason : TextComponent.fromLegacy( bungee.getTranslation( "kick_message" ) ) );
                     return;
                 }
                 if ( ch.isClosed() )
@@ -642,7 +640,11 @@ public class InitialHandler extends PacketHandler implements PendingConnection
 
     private void finish2()
     {
-        userCon.init();
+        if ( !userCon.init() )
+        {
+            disconnect( bungee.getTranslation( "already_connected_proxy" ) );
+            return;
+        }
 
         ch.getHandle().pipeline().get( HandlerBoss.class ).setHandler( new UpstreamBridge( bungee, userCon ) );
         bungee.getPluginManager().callEvent( new PostLoginEvent( userCon ) );
@@ -673,7 +675,7 @@ public class InitialHandler extends PacketHandler implements PendingConnection
     {
         if ( canSendKickMessage() )
         {
-            disconnect( TextComponent.fromLegacyText( reason ) );
+            disconnect( TextComponent.fromLegacy( reason ) );
         } else
         {
             ch.close();
@@ -683,22 +685,19 @@ public class InitialHandler extends PacketHandler implements PendingConnection
     @Override
     public void disconnect(final BaseComponent... reason)
     {
-        if ( canSendKickMessage() )
-        {
-            ch.delayedClose( new Kick( ComponentSerializer.toString( reason ) ) );
-        } else
-        {
-            ch.close();
-        }
+        disconnect( TextComponent.fromArray( reason ) );
     }
 
     @Override
     public void disconnect(BaseComponent reason)
     {
-        disconnect( new BaseComponent[]
+        if ( canSendKickMessage() )
         {
-            reason
-        } );
+            ch.delayedClose( new Kick( reason ) );
+        } else
+        {
+            ch.close();
+        }
     }
 
     @Override
@@ -755,6 +754,11 @@ public class InitialHandler extends PacketHandler implements PendingConnection
         return (int) ( duplicatedId.getMostSignificantBits() >> 8 ) & 0xF;
     }
 
+    private void updateOfflineId()
+    {
+        offlineId = UUID.nameUUIDFromBytes( ( "OfflinePlayer:" + getName() ).getBytes( StandardCharsets.UTF_8 ) );
+    }
+
     @Override
     public int getVersion()
     {
@@ -794,11 +798,6 @@ public class InitialHandler extends PacketHandler implements PendingConnection
         this.uniqueId = uuid;
     }
 
-    private void updateOfflineId()
-    {
-        offlineId = UUID.nameUUIDFromBytes( ( "OfflinePlayer:" + getName() ).getBytes( Charsets.UTF_8 ) );
-    }
-
     @Override
     public String getUUID()
     {

proxy/src/main/java/net/md_5/bungee/connection/UpstreamBridge.java

@@ -54,7 +54,6 @@ public class UpstreamBridge extends PacketHandler
         this.bungee = bungee;
         this.con = con;
 
-        BungeeCord.getInstance().addConnection( con );
         con.getTabListHandler().onConnect();
     }
 

proxy/src/main/java/net/md_5/bungee/entitymap/EntityMap.java

@@ -84,6 +84,8 @@ public abstract class EntityMap
                 return EntityMap_1_16_2.INSTANCE_1_19_4;
             case ProtocolConstants.MINECRAFT_1_20_2:
                 return EntityMap_1_16_2.INSTANCE_1_20_2;
+            case ProtocolConstants.MINECRAFT_1_20_3:
+                return EntityMap_1_16_2.INSTANCE_1_20_3;
         }
         throw new RuntimeException( "Version " + version + " has no entity map" );
     }

proxy/src/main/java/net/md_5/bungee/entitymap/EntityMap_1_16_2.java

@@ -21,6 +21,7 @@ class EntityMap_1_16_2 extends EntityMap
     static final EntityMap_1_16_2 INSTANCE_1_19_1 = new EntityMap_1_16_2( 0x02, 0x30 );
     static final EntityMap_1_16_2 INSTANCE_1_19_4 = new EntityMap_1_16_2( 0x03, 0x30 );
     static final EntityMap_1_16_2 INSTANCE_1_20_2 = new EntityMap_1_16_2( -1, 0x33 );
+    static final EntityMap_1_16_2 INSTANCE_1_20_3 = new EntityMap_1_16_2( -1, 0x34 );
     //
     private final int spawnPlayerId;
     private final int spectateId;

proxy/src/main/java/net/md_5/bungee/forge/ForgeUtils.java

@@ -1,9 +1,9 @@
 package net.md_5.bungee.forge;
 
-import com.google.common.base.Charsets;
 import com.google.common.collect.ImmutableSet;
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
+import java.nio.charset.StandardCharsets;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Set;
@@ -22,7 +22,7 @@ public class ForgeUtils
      */
     public static Set<String> readRegisteredChannels(PluginMessage pluginMessage)
     {
-        String channels = new String( pluginMessage.getData(), Charsets.UTF_8 );
+        String channels = new String( pluginMessage.getData(), StandardCharsets.UTF_8 );
         String[] split = channels.split( "\0" );
         Set<String> channelSet = ImmutableSet.copyOf( split );
         return channelSet;

proxy/src/main/java/net/md_5/bungee/netty/HandlerBoss.java

@@ -172,10 +172,7 @@ public class HandlerBoss extends ChannelInboundHandlerAdapter
                         } );
                     } else
                     {
-                        ProxyServer.getInstance().getLogger().log( Level.WARNING, "{0} - could not decode packet! {1}", new Object[]
-                        {
-                            handler, cause
-                        } );
+                        ProxyServer.getInstance().getLogger().log( Level.WARNING, handler + " - could not decode packet!", cause );
                     }
                 } else if ( cause instanceof IOException || ( cause instanceof IllegalStateException && handler instanceof InitialHandler ) )
                 {

proxy/src/main/java/net/md_5/bungee/util/AllowedCharacters.java

@@ -27,6 +27,11 @@ public final class AllowedCharacters
 
     public static boolean isValidName(String name, boolean onlineMode)
     {
+        if ( name.isEmpty() || name.length() > 16 )
+        {
+            return false;
+        }
+
         for ( int index = 0, len = name.length(); index < len; index++ )
         {
             if ( !isNameAllowedCharacter( name.charAt( index ), onlineMode ) )

proxy/src/main/java/net/md_5/bungee/util/ChatComponentTransformer.java

@@ -1,9 +1,9 @@
 package net.md_5.bungee.util;
 
 import com.google.common.base.Preconditions;
-import com.google.common.collect.Lists;
 import java.util.List;
 import java.util.regex.Pattern;
+import java.util.stream.Collectors;
 import lombok.AccessLevel;
 import lombok.NoArgsConstructor;
 import net.md_5.bungee.api.chat.BaseComponent;
@@ -34,16 +34,13 @@ public final class ChatComponentTransformer
      */
     private static final Pattern SELECTOR_PATTERN = Pattern.compile( "^@([pares])(?:\\[([^ ]*)\\])?$" );
 
-    public BaseComponent[] legacyHoverTransform(ProxiedPlayer player, BaseComponent... components)
+    public BaseComponent legacyHoverTransform(ProxiedPlayer player, BaseComponent next)
     {
         if ( player.getPendingConnection().getVersion() < ProtocolConstants.MINECRAFT_1_16 )
         {
-            for ( int i = 0; i < components.length; i++ )
-            {
-                BaseComponent next = components[i];
             if ( next.getHoverEvent() == null || next.getHoverEvent().isLegacy() )
             {
-                    continue;
+                return next;
             }
             next = next.duplicate();
             next.getHoverEvent().setLegacy( true );
@@ -53,11 +50,9 @@ public final class ChatComponentTransformer
                 next.getHoverEvent().getContents().clear();
                 next.getHoverEvent().getContents().add( exception );
             }
-                components[i] = next;
-            }
         }
 
-        return components;
+        return next;
     }
 
     public static ChatComponentTransformer getInstance()
@@ -77,7 +72,7 @@ public final class ChatComponentTransformer
      * TextComponent if the components are null or empty
      * @throws IllegalArgumentException if an entity selector pattern is present
      */
-    public BaseComponent[] transform(ProxiedPlayer player, BaseComponent... components)
+    public BaseComponent transform(ProxiedPlayer player, BaseComponent components)
     {
         return transform( player, false, components );
     }
@@ -91,31 +86,26 @@ public final class ChatComponentTransformer
      * @param player player
      * @param transformHover if the hover event should replace contents with
      * value
-     * @param components the component to transform
+     * @param root the component to transform
      * @return the transformed component, or an array containing a single empty
      * TextComponent if the components are null or empty
      * @throws IllegalArgumentException if an entity selector pattern is present
      */
-    public BaseComponent[] transform(ProxiedPlayer player, boolean transformHover, BaseComponent... components)
+    public BaseComponent transform(ProxiedPlayer player, boolean transformHover, BaseComponent root)
     {
-        if ( components == null || components.length < 1 || ( components.length == 1 && components[0] == null ) )
+        if ( root == null )
         {
-            return new BaseComponent[]
-            {
-                new TextComponent( "" )
-            };
+            return new TextComponent( "" );
         }
 
         if ( transformHover )
         {
-            components = legacyHoverTransform( player, components );
+            root = legacyHoverTransform( player, root );
         }
 
-        for ( BaseComponent root : components )
-        {
         if ( root.getExtra() != null && !root.getExtra().isEmpty() )
         {
-                List<BaseComponent> list = Lists.newArrayList( transform( player, transformHover, root.getExtra().toArray( new BaseComponent[ 0 ] ) ) );
+            List<BaseComponent> list = root.getExtra().stream().map( (extra) -> transform( player, transformHover, extra ) ).collect( Collectors.toList() );
             root.setExtra( list );
         }
 
@@ -123,8 +113,8 @@ public final class ChatComponentTransformer
         {
             transformScoreComponent( player, (ScoreComponent) root );
         }
-        }
-        return components;
+
+        return root;
     }
 
     /**