Packet type constants and auto channel mapping

common/src/main/java/us/myles/ViaVersion/api/protocol/ClientboundPacketType.java

@@ -0,0 +1,18 @@
+package us.myles.ViaVersion.api.protocol;
+
+/**
+ * Interface to be implemented by server outgoing packet type enums,
+ * representing PLAY state packets, ordered by their packet id.
+ */
+public interface ClientboundPacketType {
+
+    /**
+     * @return name of the packet, to be consistent over multiple versions
+     */
+    String name();
+
+    /**
+     * @return ordinal, being the packet id for the implemented protocol
+     */
+    int ordinal();
+}

common/src/main/java/us/myles/ViaVersion/api/protocol/Protocol.java

@@ -1,5 +1,6 @@
 package us.myles.ViaVersion.api.protocol;
 
+import com.google.common.base.Preconditions;
 import us.myles.ViaVersion.api.PacketWrapper;
 import us.myles.ViaVersion.api.Via;
 import us.myles.ViaVersion.api.data.UserConnection;
@@ -9,6 +10,7 @@ import us.myles.ViaVersion.exception.CancelException;
 import us.myles.ViaVersion.packets.Direction;
 import us.myles.ViaVersion.packets.State;
 
+import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -18,15 +20,89 @@ public abstract class Protocol {
     private final Map<Packet, ProtocolPacket> incoming = new HashMap<>();
     private final Map<Packet, ProtocolPacket> outgoing = new HashMap<>();
     private final Map<Class, Object> storedObjects = new HashMap<>(); // currently only used for MetadataRewriters
-    private final boolean hasMappingDataToLoad;
+    protected final Class<? extends ClientboundPacketType> oldClientboundPacketEnum;
+    protected final Class<? extends ClientboundPacketType> newClientboundPacketEnum;
+    protected final Class<? extends ServerboundPacketType> oldServerboundPacketEnum;
+    protected final Class<? extends ServerboundPacketType> newServerboundPacketEnum;
+    protected final boolean hasMappingDataToLoad;
 
-    public Protocol() {
+    protected Protocol() {
-        this(false);
+        this(null, null, null, null, false);
     }
 
-    public Protocol(boolean hasMappingDataToLoad) {
+    protected Protocol(boolean hasMappingDataToLoad) {
+        this(null, null, null, null, hasMappingDataToLoad);
+    }
+
+    /**
+     * Creates a protocol with automated id mapping if the respective enums are not null.
+     */
+    protected Protocol(Class<? extends ClientboundPacketType> oldClientboundPacketEnum, Class<? extends ClientboundPacketType> clientboundPacketEnum,
+                       Class<? extends ServerboundPacketType> oldServerboundPacketEnum, Class<? extends ServerboundPacketType> serverboundPacketEnum) {
+        this(oldClientboundPacketEnum, clientboundPacketEnum, oldServerboundPacketEnum, serverboundPacketEnum, false);
+    }
+
+    /**
+     * Creates a protocol with automated id mapping if the respective enums are not null.
+     *
+     * @param hasMappingDataToLoad whether an async executor should call the {@Link #loadMappingData} method
+     */
+    protected Protocol(Class<? extends ClientboundPacketType> oldClientboundPacketEnum, Class<? extends ClientboundPacketType> clientboundPacketEnum,
+                       Class<? extends ServerboundPacketType> oldServerboundPacketEnum, Class<? extends ServerboundPacketType> serverboundPacketEnum, boolean hasMappingDataToLoad) {
+        this.oldClientboundPacketEnum = oldClientboundPacketEnum;
+        this.newClientboundPacketEnum = clientboundPacketEnum;
+        this.oldServerboundPacketEnum = oldServerboundPacketEnum;
+        this.newServerboundPacketEnum = serverboundPacketEnum;
         this.hasMappingDataToLoad = hasMappingDataToLoad;
         registerPackets();
+
+        // Register the rest of the ids with no handlers if necessary
+        if (oldClientboundPacketEnum != null && clientboundPacketEnum != null
+                && oldClientboundPacketEnum != clientboundPacketEnum) {
+            registerOutgoingChannelIdChanges();
+        }
+        if (oldServerboundPacketEnum != null && serverboundPacketEnum != null
+                && oldServerboundPacketEnum != serverboundPacketEnum) {
+            registerIncomingChannelIdChanges();
+        }
+    }
+
+    protected void registerOutgoingChannelIdChanges() {
+        ClientboundPacketType[] newConstants = newClientboundPacketEnum.getEnumConstants();
+        Map<String, ClientboundPacketType> newClientboundPackets = new HashMap<>(newConstants.length);
+        for (ClientboundPacketType newConstant : newConstants) {
+            newClientboundPackets.put(newConstant.name(), newConstant);
+        }
+
+        for (ClientboundPacketType packet : oldClientboundPacketEnum.getEnumConstants()) {
+            ClientboundPacketType mappedPacket = newClientboundPackets.get(packet.name());
+            if (mappedPacket == null) continue; // Packet doesn't exist on new client
+
+            int oldId = packet.ordinal();
+            int newId = mappedPacket.ordinal();
+            if (!hasRegisteredOutgoing(State.PLAY, oldId)) {
+                registerOutgoing(State.PLAY, oldId, newId);
+            }
+        }
+    }
+
+    protected void registerIncomingChannelIdChanges() {
+        ServerboundPacketType[] oldConstants = oldServerboundPacketEnum.getEnumConstants();
+        Map<String, ServerboundPacketType> oldServerboundConstants = new HashMap<>(oldConstants.length);
+        for (ServerboundPacketType oldConstant : oldConstants) {
+            oldServerboundConstants.put(oldConstant.name(), oldConstant);
+        }
+
+        for (ServerboundPacketType packet : newServerboundPacketEnum.getEnumConstants()) {
+            ServerboundPacketType mappedPacket = oldServerboundConstants.get(packet.name());
+            if (mappedPacket == null) continue; // Packet doesn't exist on old server
+
+            int oldId = mappedPacket.ordinal();
+            int newId = packet.ordinal();
+            if (!hasRegisteredIncoming(State.PLAY, newId)) {
+                registerIncoming(State.PLAY, oldId, newId);
+            }
+        }
     }
 
     /**
@@ -155,16 +231,6 @@ public abstract class Protocol {
         registerOutgoing(state, oldPacketID, newPacketID, packetRemapper, false);
     }
 
-    public void registerOutgoing(State state, int oldPacketID, int newPacketID, PacketRemapper packetRemapper, boolean override) {
-        ProtocolPacket protocolPacket = new ProtocolPacket(state, oldPacketID, newPacketID, packetRemapper);
-        Packet packet = new Packet(state, oldPacketID);
-        if (!override && outgoing.containsKey(packet)) {
-            Via.getPlatform().getLogger().log(Level.WARNING, packet + " already registered!" +
-                    " If override is intentional, set override to true. Stacktrace: ", new Exception());
-        }
-        outgoing.put(packet, protocolPacket);
-    }
-
     public void cancelOutgoing(State state, int oldPacketID, int newPacketID) {
         registerOutgoing(state, oldPacketID, newPacketID, new PacketRemapper() {
             @Override
@@ -178,6 +244,118 @@ public abstract class Protocol {
         cancelOutgoing(state, oldPacketID, -1);
     }
 
+
+    public void registerOutgoing(State state, int oldPacketID, int newPacketID, PacketRemapper packetRemapper, boolean override) {
+        ProtocolPacket protocolPacket = new ProtocolPacket(state, oldPacketID, newPacketID, packetRemapper);
+        Packet packet = new Packet(state, oldPacketID);
+        if (!override && outgoing.containsKey(packet)) {
+            Via.getPlatform().getLogger().log(Level.WARNING, packet + " already registered!" +
+                    " If override is intentional, set override to true. Stacktrace: ", new Exception());
+        }
+        outgoing.put(packet, protocolPacket);
+    }
+
+    /**
+     * Registers an outgoing protocol and automatically maps it to the new id.
+     *
+     * @param packetType     packet type the server sends
+     * @param packetRemapper remapper
+     */
+    public void registerOutgoing(ClientboundPacketType packetType, PacketRemapper packetRemapper) {
+        Preconditions.checkArgument(packetType.getClass() == oldClientboundPacketEnum);
+
+        ClientboundPacketType mappedPacket = oldClientboundPacketEnum == newClientboundPacketEnum ? packetType
+                : Arrays.stream(newClientboundPacketEnum.getEnumConstants()).filter(en -> en.name().equals(packetType.name())).findAny().orElse(null);
+        Preconditions.checkNotNull(mappedPacket, "Packet type " + packetType + " in " + packetType.getClass().getSimpleName() + " could not be automatically mapped!");
+
+        int oldId = packetType.ordinal();
+        int newId = mappedPacket.ordinal();
+        registerOutgoing(State.PLAY, oldId, newId, packetRemapper);
+    }
+
+    /**
+     * Registers an outgoing protocol.
+     *
+     * @param oldPacketType  packet type the server sends
+     * @param newPacketType  new packet type
+     * @param packetRemapper remapper
+     */
+    public void registerOutgoing(ClientboundPacketType oldPacketType, ClientboundPacketType newPacketType, PacketRemapper packetRemapper) {
+        Preconditions.checkArgument(oldPacketType.getClass() == oldClientboundPacketEnum);
+        Preconditions.checkArgument(newPacketType == null || newPacketType.getClass() == newClientboundPacketEnum);
+        registerOutgoing(State.PLAY, oldPacketType.ordinal(), newPacketType != null ? newPacketType.ordinal() : -1, packetRemapper);
+    }
+
+    public void registerOutgoing(ClientboundPacketType oldPacketType, ClientboundPacketType newPacketType) {
+        registerOutgoing(oldPacketType, newPacketType, null);
+    }
+
+    public void cancelOutgoing(ClientboundPacketType packetType) {
+        Preconditions.checkArgument(packetType.getClass() == oldClientboundPacketEnum);
+        cancelOutgoing(State.PLAY, packetType.ordinal(), packetType.ordinal());
+    }
+
+    /**
+     * Registers an incoming protocol and automatically maps it to the server's id.
+     *
+     * @param packetType     packet type the client sends
+     * @param packetRemapper remapper
+     */
+    public void registerIncoming(ServerboundPacketType packetType, PacketRemapper packetRemapper) {
+        Preconditions.checkArgument(packetType.getClass() == newServerboundPacketEnum);
+
+        ServerboundPacketType mappedPacket = oldServerboundPacketEnum == newServerboundPacketEnum ? packetType
+                : Arrays.stream(oldServerboundPacketEnum.getEnumConstants()).filter(en -> en.name().equals(packetType.name())).findAny().orElse(null);
+        Preconditions.checkNotNull(mappedPacket, "Packet type " + packetType + " in " + packetType.getClass().getSimpleName() + " could not be automatically mapped!");
+
+        int oldId = mappedPacket.ordinal();
+        int newId = packetType.ordinal();
+        registerIncoming(State.PLAY, oldId, newId, packetRemapper);
+    }
+
+    /**
+     * Registers an incoming protocol.
+     *
+     * @param oldPacketType  packet type for the server
+     * @param newPacketType  packet type the client sends
+     * @param packetRemapper remapper
+     */
+    public void registerIncoming(ServerboundPacketType oldPacketType, ServerboundPacketType newPacketType, PacketRemapper packetRemapper) {
+        Preconditions.checkArgument(oldPacketType == null || oldPacketType.getClass() == oldServerboundPacketEnum);
+        Preconditions.checkArgument(newPacketType.getClass() == newServerboundPacketEnum);
+        registerIncoming(State.PLAY, oldPacketType != null ? oldPacketType.ordinal() : -1, newPacketType.ordinal(), packetRemapper);
+    }
+
+    public void cancelIncoming(ServerboundPacketType packetType) {
+        Preconditions.checkArgument(packetType.getClass() == newServerboundPacketEnum);
+        cancelIncoming(State.PLAY, -1, packetType.ordinal());
+    }
+
+
+    /**
+     * Checks if an outgoing packet has already been registered.
+     *
+     * @param state       state which the packet is sent in
+     * @param oldPacketID old packet ID
+     * @return true if already registered
+     */
+    public boolean hasRegisteredOutgoing(State state, int oldPacketID) {
+        Packet packet = new Packet(state, oldPacketID);
+        return outgoing.containsKey(packet);
+    }
+
+    /**
+     * Checks if an incoming packet has already been registered.
+     *
+     * @param state       state which the packet is sent in
+     * @param newPacketId packet ID
+     * @return true if already registered
+     */
+    public boolean hasRegisteredIncoming(State state, int newPacketId) {
+        Packet packet = new Packet(state, newPacketId);
+        return incoming.containsKey(packet);
+    }
+
     public boolean hasMappingDataToLoad() {
         return hasMappingDataToLoad;
     }

common/src/main/java/us/myles/ViaVersion/api/protocol/ServerboundPacketType.java

@@ -0,0 +1,18 @@
+package us.myles.ViaVersion.api.protocol;
+
+/**
+ * Interface to be implemented by server incoming packet type enums,
+ * representing PLAY state packets, ordered by their packet id.
+ */
+public interface ServerboundPacketType {
+
+    /**
+     * @return name of the packet, to be consistent over multiple versions
+     */
+    String name();
+
+    /**
+     * @return ordinal, being the packet id for the implemented protocol
+     */
+    int ordinal();
+}

common/src/main/java/us/myles/ViaVersion/api/rewriters/BlockRewriter.java

@@ -3,10 +3,10 @@ package us.myles.ViaVersion.api.rewriters;
 import us.myles.ViaVersion.api.minecraft.BlockChangeRecord;
 import us.myles.ViaVersion.api.minecraft.Position;
 import us.myles.ViaVersion.api.minecraft.item.Item;
+import us.myles.ViaVersion.api.protocol.ClientboundPacketType;
 import us.myles.ViaVersion.api.protocol.Protocol;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.type.Type;
-import us.myles.ViaVersion.packets.State;
 
 // If any of these methods become outdated, just create a new rewriter overriding the methods
 public class BlockRewriter {
@@ -22,8 +22,8 @@ public class BlockRewriter {
         this.blockRewriter = blockRewriter;
     }
 
-    public void registerBlockAction(int oldPacketId, int newPacketId) {
+    public void registerBlockAction(ClientboundPacketType packetType) {
-        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(positionType); // Location
@@ -35,8 +35,8 @@ public class BlockRewriter {
         });
     }
 
-    public void registerBlockChange(int oldPacketId, int newPacketId) {
+    public void registerBlockChange(ClientboundPacketType packetType) {
-        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(positionType);
@@ -46,8 +46,8 @@ public class BlockRewriter {
         });
     }
 
-    public void registerMultiBlockChange(int oldPacketId, int newPacketId) {
+    public void registerMultiBlockChange(ClientboundPacketType packetType) {
-        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.INT); // 0 - Chunk X
@@ -62,13 +62,13 @@ public class BlockRewriter {
         });
     }
 
-    public void registerAcknowledgePlayerDigging(int oldPacketId, int newPacketId) {
+    public void registerAcknowledgePlayerDigging(ClientboundPacketType packetType) {
         // Same exact handler
-        registerBlockChange(oldPacketId, newPacketId);
+        registerBlockChange(packetType);
     }
 
-    public void registerEffect(int oldPacketId, int newPacketId, int playRecordId, int blockBreakId, IdRewriteFunction itemIdRewriteFunction) {
+    public void registerEffect(ClientboundPacketType packetType, int playRecordId, int blockBreakId, IdRewriteFunction itemIdRewriteFunction) {
-        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.INT); // Effect Id
@@ -87,14 +87,14 @@ public class BlockRewriter {
         });
     }
 
-    public void registerSpawnParticle(Type<?> coordType, int oldPacketId, int newPacketId, int blockId, int fallingDustId, int itemId,
+    public void registerSpawnParticle(Type<?> coordType, ClientboundPacketType packetType, int blockId, int fallingDustId, int itemId,
                                       ItemRewriter.RewriteFunction itemRewriteFunction, Type<Item> itemType) {
-        registerSpawnParticle(coordType, oldPacketId, newPacketId, blockId, fallingDustId, itemId, null, itemRewriteFunction, itemType);
+        registerSpawnParticle(coordType, packetType, blockId, fallingDustId, itemId, null, itemRewriteFunction, itemType);
     }
 
-    public void registerSpawnParticle(Type<?> coordType, int oldPacketId, int newPacketId, int blockId, int fallingDustId, int itemId,
+    public void registerSpawnParticle(Type<?> coordType, ClientboundPacketType packetType, int blockId, int fallingDustId, int itemId,
                                       IdRewriteFunction particleRewriteFunction, ItemRewriter.RewriteFunction itemRewriteFunction, Type<Item> itemType) {
-        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.INT); // 0 - Particle ID

common/src/main/java/us/myles/ViaVersion/api/rewriters/ItemRewriter.java

@@ -1,7 +1,9 @@
 package us.myles.ViaVersion.api.rewriters;
 
 import us.myles.ViaVersion.api.minecraft.item.Item;
+import us.myles.ViaVersion.api.protocol.ClientboundPacketType;
 import us.myles.ViaVersion.api.protocol.Protocol;
+import us.myles.ViaVersion.api.protocol.ServerboundPacketType;
 import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.type.Type;
@@ -19,8 +21,8 @@ public class ItemRewriter {
         this.toServer = toServer;
     }
 
-    public void registerWindowItems(Type<Item[]> type, int oldPacketId, int newPacketId) {
+    public void registerWindowItems(Type<Item[]> type, ClientboundPacketType packetType) {
-        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.UNSIGNED_BYTE); // 0 - Window ID
@@ -31,8 +33,8 @@ public class ItemRewriter {
         });
     }
 
-    public void registerSetSlot(Type<Item> type, int oldPacketId, int newPacketId) {
+    public void registerSetSlot(Type<Item> type, ClientboundPacketType packetType) {
-        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.BYTE); // 0 - Window ID
@@ -44,8 +46,8 @@ public class ItemRewriter {
         });
     }
 
-    public void registerEntityEquipment(Type<Item> type, int oldPacketId, int newPacketId) {
+    public void registerEntityEquipment(Type<Item> type, ClientboundPacketType packetType) {
-        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity ID
@@ -57,8 +59,8 @@ public class ItemRewriter {
         });
     }
 
-    public void registerCreativeInvAction(Type<Item> type, int oldPacketId, int newPacketId) {
+    public void registerCreativeInvAction(Type<Item> type, ServerboundPacketType packetType) {
-        protocol.registerIncoming(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+        protocol.registerIncoming(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.SHORT); // 0 - Slot
@@ -69,8 +71,8 @@ public class ItemRewriter {
         });
     }
 
-    public void registerClickWindow(Type<Item> type, int oldPacketId, int newPacketId) {
+    public void registerClickWindow(Type<Item> type, ServerboundPacketType packetType) {
-        protocol.registerIncoming(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+        protocol.registerIncoming(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.UNSIGNED_BYTE); // 0 - Window ID
@@ -85,8 +87,8 @@ public class ItemRewriter {
         });
     }
 
-    public void registerSetCooldown(int oldPacketId, int newPacketId, IdRewriteFunction itemIDRewriteFunction) {
+    public void registerSetCooldown(ClientboundPacketType packetType, IdRewriteFunction itemIDRewriteFunction) {
-        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(wrapper -> {
@@ -115,6 +117,77 @@ public class ItemRewriter {
         return wrapper -> toServer.rewrite(wrapper.get(type, 0));
     }
 
+    @Deprecated
+    public void registerWindowItems(Type<Item[]> type, int oldPacketId, int newPacketId) {
+        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.UNSIGNED_BYTE); // 0 - Window ID
+                map(type); // 1 - Window Values
+
+                handler(itemArrayHandler(type));
+            }
+        });
+    }
+
+    @Deprecated
+    public void registerSetSlot(Type<Item> type, int oldPacketId, int newPacketId) {
+        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.BYTE); // 0 - Window ID
+                map(Type.SHORT); // 1 - Slot ID
+                map(type); // 2 - Slot Value
+
+                handler(itemToClientHandler(type));
+            }
+        });
+    }
+
+    @Deprecated
+    public void registerEntityEquipment(Type<Item> type, int oldPacketId, int newPacketId) {
+        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity ID
+                map(Type.VAR_INT); // 1 - Slot ID
+                map(type); // 2 - Item
+
+                handler(itemToClientHandler(type));
+            }
+        });
+    }
+
+    @Deprecated
+    public void registerCreativeInvAction(Type<Item> type, int oldPacketId, int newPacketId) {
+        protocol.registerIncoming(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.SHORT); // 0 - Slot
+                map(type); // 1 - Clicked Item
+
+                handler(itemToServerHandler(type));
+            }
+        });
+    }
+
+    @Deprecated
+    public void registerClickWindow(Type<Item> type, int oldPacketId, int newPacketId) {
+        protocol.registerIncoming(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.UNSIGNED_BYTE); // 0 - Window ID
+                map(Type.SHORT); // 1 - Slot
+                map(Type.BYTE); // 2 - Button
+                map(Type.SHORT); // 3 - Action number
+                map(Type.VAR_INT); // 4 - Mode
+                map(type); // 5 - Clicked Item
+
+                handler(itemToServerHandler(type));
+            }
+        });
+    }
+
     @FunctionalInterface
     public interface RewriteFunction {
 

common/src/main/java/us/myles/ViaVersion/api/rewriters/MetadataRewriter.java

@@ -4,6 +4,7 @@ import us.myles.ViaVersion.api.Via;
 import us.myles.ViaVersion.api.data.UserConnection;
 import us.myles.ViaVersion.api.entities.EntityType;
 import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
+import us.myles.ViaVersion.api.protocol.ClientboundPacketType;
 import us.myles.ViaVersion.api.protocol.Protocol;
 import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
@@ -12,7 +13,11 @@ import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.packets.State;
 import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
 
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 import java.util.logging.Logger;
 
 public abstract class MetadataRewriter {
@@ -54,8 +59,8 @@ public abstract class MetadataRewriter {
         }
     }
 
-    public void registerJoinGame(int oldPacketId, int newPacketId, EntityType playerType) {
+    public void registerJoinGame(ClientboundPacketType packetType, EntityType playerType) {
-        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.INT); // 0 - Entity ID
@@ -74,8 +79,8 @@ public abstract class MetadataRewriter {
         });
     }
 
-    public void registerRespawn(int oldPacketId, int newPacketId) {
+    public void registerRespawn(ClientboundPacketType packetType) {
-        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.INT);
@@ -88,8 +93,8 @@ public abstract class MetadataRewriter {
         });
     }
 
-    public void registerTracker(int oldPacketId, int newPacketId) {
+    public void registerTracker(ClientboundPacketType packetType) {
-        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity ID
@@ -100,8 +105,8 @@ public abstract class MetadataRewriter {
         });
     }
 
-    public void registerSpawnTrackerWithData(int oldPacketId, int newPacketId, EntityType fallingBlockType, IdRewriteFunction itemRewriter) {
+    public void registerSpawnTrackerWithData(ClientboundPacketType packetType, EntityType fallingBlockType, IdRewriteFunction itemRewriter) {
-        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity id
@@ -125,8 +130,8 @@ public abstract class MetadataRewriter {
         });
     }
 
-    public void registerTracker(int oldPacketId, int newPacketId, EntityType entityType) {
+    public void registerTracker(ClientboundPacketType packetType, EntityType entityType) {
-        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity ID
@@ -138,8 +143,8 @@ public abstract class MetadataRewriter {
         });
     }
 
-    public void registerEntityDestroy(int oldPacketId, int newPacketId) {
+    public void registerEntityDestroy(ClientboundPacketType packetType) {
-        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT_ARRAY_PRIMITIVE); // 0 - Entity ids
@@ -153,8 +158,8 @@ public abstract class MetadataRewriter {
         });
     }
 
-    public void registerMetadataRewriter(int oldPacketId, int newPacketId, Type<List<Metadata>> oldMetaType, Type<List<Metadata>> newMetaType) {
+    public void registerMetadataRewriter(ClientboundPacketType packetType, Type<List<Metadata>> oldMetaType, Type<List<Metadata>> newMetaType) {
-        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity ID
@@ -172,8 +177,8 @@ public abstract class MetadataRewriter {
         });
     }
 
-    public void registerMetadataRewriter(int oldPacketId, int newPacketId, Type<List<Metadata>> metaType) {
+    public void registerMetadataRewriter(ClientboundPacketType packetType, Type<List<Metadata>> metaType) {
-        registerMetadataRewriter(oldPacketId, newPacketId, null, metaType);
+        registerMetadataRewriter(packetType, null, metaType);
     }
 
     public <T extends Enum<T> & EntityType> void mapTypes(EntityType[] oldTypes, Class<T> newTypeClass) {
@@ -200,6 +205,78 @@ public abstract class MetadataRewriter {
         return getTrackerAndRewriter(null);
     }
 
+    @Deprecated
+    public void registerJoinGame(int oldPacketId, int newPacketId, EntityType playerType) {
+        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.INT); // 0 - Entity ID
+                map(Type.UNSIGNED_BYTE); // 1 - Gamemode
+                map(Type.INT); // 2 - Dimension
+                handler(wrapper -> {
+                    ClientWorld clientChunks = wrapper.user().get(ClientWorld.class);
+                    int dimensionId = wrapper.get(Type.INT, 1);
+                    clientChunks.setEnvironment(dimensionId);
+
+                    if (playerType != null) {
+                        wrapper.user().get(entityTrackerClass).addEntity(wrapper.get(Type.INT, 0), playerType);
+                    }
+                });
+            }
+        });
+    }
+
+    @Deprecated
+    public void registerRespawn(int oldPacketId, int newPacketId) {
+        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.INT);
+                handler(wrapper -> {
+                    ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
+                    int dimensionId = wrapper.get(Type.INT, 0);
+                    clientWorld.setEnvironment(dimensionId);
+                });
+            }
+        });
+    }
+
+    @Deprecated
+    public void registerEntityDestroy(int oldPacketId, int newPacketId) {
+        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT_ARRAY_PRIMITIVE); // 0 - Entity ids
+                handler(wrapper -> {
+                    EntityTracker entityTracker = wrapper.user().get(entityTrackerClass);
+                    for (int entity : wrapper.get(Type.VAR_INT_ARRAY_PRIMITIVE, 0)) {
+                        entityTracker.removeEntity(entity);
+                    }
+                });
+            }
+        });
+    }
+
+    @Deprecated
+    public void registerMetadataRewriter(int oldPacketId, int newPacketId, Type<List<Metadata>> oldMetaType, Type<List<Metadata>> newMetaType) {
+        protocol.registerOutgoing(State.PLAY, oldPacketId, newPacketId, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity ID
+                if (oldMetaType != null) {
+                    map(oldMetaType, newMetaType);
+                } else {
+                    map(newMetaType);
+                }
+                handler(wrapper -> {
+                    int entityId = wrapper.get(Type.VAR_INT, 0);
+                    List<Metadata> metadata = wrapper.get(newMetaType, 0);
+                    handleMetadata(entityId, metadata, wrapper.user());
+                });
+            }
+        });
+    }
+
     // ---------------------------------------------------------------------------
     // Sub 1.14.1 methods
 

common/src/main/java/us/myles/ViaVersion/api/rewriters/SoundRewriter.java

@@ -1,5 +1,6 @@
 package us.myles.ViaVersion.api.rewriters;
 
+import us.myles.ViaVersion.api.protocol.ClientboundPacketType;
 import us.myles.ViaVersion.api.protocol.Protocol;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.type.Type;
@@ -17,7 +18,15 @@ public class SoundRewriter {
 
     // The same for entity sound effect
     public void registerSound(int oldId, int newId) {
-        protocol.registerOutgoing(State.PLAY, oldId, newId, new PacketRemapper() {
+        protocol.registerOutgoing(State.PLAY, oldId, newId, getRemapper());
+    }
+
+    public void registerSound(ClientboundPacketType packetType) {
+        protocol.registerOutgoing(packetType, getRemapper());
+    }
+
+    protected PacketRemapper getRemapper() {
+        return new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // Sound Id
@@ -31,6 +40,6 @@ public class SoundRewriter {
                     }
                 });
             }
-        });
+        };
     }
 }

common/src/main/java/us/myles/ViaVersion/api/rewriters/TagRewriter.java

@@ -1,10 +1,10 @@
 package us.myles.ViaVersion.api.rewriters;
 
 import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.protocol.ClientboundPacketType;
 import us.myles.ViaVersion.api.protocol.Protocol;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.type.Type;
-import us.myles.ViaVersion.packets.State;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -40,8 +40,8 @@ public class TagRewriter {
         newTags.add(new TagData(id, oldIds));
     }
 
-    public void register(int oldId, int newId) {
+    public void register(ClientboundPacketType packetType) {
-        protocol.registerOutgoing(State.PLAY, oldId, newId, new PacketRemapper() {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(wrapper -> {

common/src/main/java/us/myles/ViaVersion/packets/Direction.java

@@ -1,6 +1,13 @@
 package us.myles.ViaVersion.packets;
 
 public enum Direction {
+
+    /**
+     * Outgoing server packets sent to the client.
+     */
     OUTGOING,
+    /**
+     * Incoming server packets send by the client to the server.
+     */
     INCOMING
 }

common/src/main/java/us/myles/ViaVersion/packets/State.java

@@ -1,6 +1,7 @@
 package us.myles.ViaVersion.packets;
 
 public enum State {
+
     HANDSHAKE,
     STATUS,
     LOGIN,

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_11_1to1_11/Protocol1_11_1To1_11.java

@@ -3,6 +3,7 @@ package us.myles.ViaVersion.protocols.protocol1_11_1to1_11;
 import us.myles.ViaVersion.api.protocol.Protocol;
 
 public class Protocol1_11_1To1_11 extends Protocol {
+
     @Override
     protected void registerPackets() {
         // Only had metadata changes, see wiki.vg for full info.

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_11to1_10/Protocol1_11To1_10.java

@@ -106,7 +106,7 @@ public class Protocol1_11To1_10 extends Protocol {
         });
 
         // Metadata packet
-        metadataRewriter.registerMetadataRewriter(0x39, 0x39, Types1_9.METADATA_LIST);
+        metadataRewriter.registerMetadataRewriter(0x39, 0x39, null, Types1_9.METADATA_LIST);
 
         // Entity teleport
         registerOutgoing(State.PLAY, 0x49, 0x49, new PacketRemapper() {

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_12_1to1_12/Protocol1_12_1To1_12.java

@@ -8,6 +8,7 @@ import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.packets.State;
 
 public class Protocol1_12_1To1_12 extends Protocol {
+
     @Override
     protected void registerPackets() {
         registerOutgoing(State.PLAY, -1, 0x2B); // TODO new packet?

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_12_2to1_12_1/Protocol1_12_2To1_12_1.java

@@ -6,6 +6,7 @@ import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.packets.State;
 
 public class Protocol1_12_2To1_12_1 extends Protocol {
+
     @Override
     protected void registerPackets() {
         // Outgoing

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_12to1_11_1/Protocol1_12To1_11_1.java

@@ -168,7 +168,7 @@ public class Protocol1_12To1_11_1 extends Protocol {
         registerOutgoing(State.PLAY, 0x38, 0x3a);
 
         // Metadata packet
-        metadataRewriter.registerMetadataRewriter(0x39, 0x3b, Types1_12.METADATA_LIST);
+        metadataRewriter.registerMetadataRewriter(0x39, 0x3b, null, Types1_12.METADATA_LIST);
 
         registerOutgoing(State.PLAY, 0x3a, 0x3c);
         registerOutgoing(State.PLAY, 0x3b, 0x3d);

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13_1to1_13/Protocol1_13_1To1_13.java

@@ -8,16 +8,21 @@ import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.remapper.ValueTransformer;
 import us.myles.ViaVersion.api.type.Type;
-import us.myles.ViaVersion.packets.State;
 import us.myles.ViaVersion.protocols.protocol1_13_1to1_13.metadata.MetadataRewriter1_13_1To1_13;
 import us.myles.ViaVersion.protocols.protocol1_13_1to1_13.packets.EntityPackets;
 import us.myles.ViaVersion.protocols.protocol1_13_1to1_13.packets.InventoryPackets;
 import us.myles.ViaVersion.protocols.protocol1_13_1to1_13.packets.WorldPackets;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ServerboundPackets1_13;
 import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.storage.EntityTracker1_13;
 import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
 
 public class Protocol1_13_1To1_13 extends Protocol {
 
+    public Protocol1_13_1To1_13() {
+        super(ClientboundPackets1_13.class, ClientboundPackets1_13.class, ServerboundPackets1_13.class, ServerboundPackets1_13.class);
+    }
+
     @Override
     protected void registerPackets() {
         new MetadataRewriter1_13_1To1_13(this);
@@ -26,8 +31,7 @@ public class Protocol1_13_1To1_13 extends Protocol {
         InventoryPackets.register(this);
         WorldPackets.register(this);
 
-        //Tab complete
+        registerIncoming(ServerboundPackets1_13.TAB_COMPLETE, new PacketRemapper() {
-        registerIncoming(State.PLAY, 0x05, 0x05, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT);
@@ -41,8 +45,7 @@ public class Protocol1_13_1To1_13 extends Protocol {
             }
         });
 
-        //Edit Book
+        registerIncoming(ServerboundPackets1_13.EDIT_BOOK, new PacketRemapper() {
-        registerIncoming(State.PLAY, 0x0B, 0x0B, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.FLAT_ITEM);
@@ -66,8 +69,7 @@ public class Protocol1_13_1To1_13 extends Protocol {
             }
         });
 
-        // Tab complete
+        registerOutgoing(ClientboundPackets1_13.TAB_COMPLETE, new PacketRemapper() {
-        registerOutgoing(State.PLAY, 0x10, 0x10, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // Transaction id
@@ -93,8 +95,7 @@ public class Protocol1_13_1To1_13 extends Protocol {
             }
         });
 
-        // Boss bar
+        registerOutgoing(ClientboundPackets1_13.BOSSBAR, new PacketRemapper() {
-        registerOutgoing(State.PLAY, 0x0C, 0x0C, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.UUID);
@@ -117,8 +118,7 @@ public class Protocol1_13_1To1_13 extends Protocol {
             }
         });
 
-        // Advancements
+        registerOutgoing(ClientboundPackets1_13.ADVANCEMENTS, new PacketRemapper() {
-        registerOutgoing(State.PLAY, 0x51, 0x51, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(new PacketHandler() {
@@ -160,9 +160,7 @@ public class Protocol1_13_1To1_13 extends Protocol {
             }
         });
 
-
+        registerOutgoing(ClientboundPackets1_13.TAGS, new PacketRemapper() {
-        //Tags
-        registerOutgoing(State.PLAY, 0x55, 0x55, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(new PacketHandler() {
@@ -193,9 +191,10 @@ public class Protocol1_13_1To1_13 extends Protocol {
     @Override
     public void init(UserConnection userConnection) {
         userConnection.put(new EntityTracker1_13(userConnection));
-        if (!userConnection.has(ClientWorld.class))
+        if (!userConnection.has(ClientWorld.class)) {
             userConnection.put(new ClientWorld(userConnection));
         }
+    }
 
 
     public static int getNewBlockStateId(int blockId) {

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13_1to1_13/packets/EntityPackets.java

@@ -2,23 +2,21 @@ package us.myles.ViaVersion.protocols.protocol1_13_1to1_13.packets;
 
 import us.myles.ViaVersion.api.PacketWrapper;
 import us.myles.ViaVersion.api.entities.Entity1_13Types;
-import us.myles.ViaVersion.api.protocol.Protocol;
 import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.api.type.types.version.Types1_13;
-import us.myles.ViaVersion.packets.State;
 import us.myles.ViaVersion.protocols.protocol1_13_1to1_13.Protocol1_13_1To1_13;
 import us.myles.ViaVersion.protocols.protocol1_13_1to1_13.metadata.MetadataRewriter1_13_1To1_13;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
 import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.storage.EntityTracker1_13;
 
 public class EntityPackets {
 
-    public static void register(final Protocol protocol) {
+    public static void register(Protocol1_13_1To1_13 protocol) {
         MetadataRewriter1_13_1To1_13 metadataRewriter = protocol.get(MetadataRewriter1_13_1To1_13.class);
 
-        //spawn entity
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_ENTITY, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x0, 0x0, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity id
@@ -52,8 +50,7 @@ public class EntityPackets {
             }
         });
 
-        // Spawn mob packet
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_MOB, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x3, 0x3, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity ID
@@ -74,8 +71,7 @@ public class EntityPackets {
             }
         });
 
-        // Spawn player packet
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_PLAYER, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x05, 0x05, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity ID
@@ -91,10 +87,7 @@ public class EntityPackets {
             }
         });
 
-        // Destroy entities
+        metadataRewriter.registerEntityDestroy(ClientboundPackets1_13.DESTROY_ENTITIES);
-        metadataRewriter.registerEntityDestroy(0x35, 0x35);
+        metadataRewriter.registerMetadataRewriter(ClientboundPackets1_13.ENTITY_METADATA, Types1_13.METADATA_LIST);
-
-        // Metadata packet
-        metadataRewriter.registerMetadataRewriter(0x3F, 0x3F, Types1_13.METADATA_LIST);
     }
 }

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13_1to1_13/packets/InventoryPackets.java

@@ -7,24 +7,19 @@ import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.rewriters.ItemRewriter;
 import us.myles.ViaVersion.api.type.Type;
-import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ServerboundPackets1_13;
 
 public class InventoryPackets {
 
     public static void register(Protocol protocol) {
         ItemRewriter itemRewriter = new ItemRewriter(protocol, InventoryPackets::toClient, InventoryPackets::toServer);
 
-        // Set cooldown
+        itemRewriter.registerSetCooldown(ClientboundPackets1_13.COOLDOWN, InventoryPackets::getNewItemId);
-        itemRewriter.registerSetCooldown(0x18, 0x18, InventoryPackets::getNewItemId);
+        itemRewriter.registerSetSlot(Type.FLAT_ITEM, ClientboundPackets1_13.SET_SLOT);
+        itemRewriter.registerWindowItems(Type.FLAT_ITEM_ARRAY, ClientboundPackets1_13.WINDOW_ITEMS);
 
-        // Set slot packet
+        protocol.registerOutgoing(ClientboundPackets1_13.PLUGIN_MESSAGE, new PacketRemapper() {
-        itemRewriter.registerSetSlot(Type.FLAT_ITEM, 0x17, 0x17);
-
-        // Window items packet
-        itemRewriter.registerWindowItems(Type.FLAT_ITEM_ARRAY, 0x15, 0x15);
-
-        // Plugin message
-        protocol.registerOutgoing(State.PLAY, 0x19, 0x19, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.STRING); // Channel
@@ -58,11 +53,9 @@ public class InventoryPackets {
             }
         });
 
-        // Entity Equipment Packet
+        itemRewriter.registerEntityEquipment(Type.FLAT_ITEM, ClientboundPackets1_13.ENTITY_EQUIPMENT);
-        itemRewriter.registerEntityEquipment(Type.FLAT_ITEM, 0x42, 0x42);
 
-        // Declare Recipes
+        protocol.registerOutgoing(ClientboundPackets1_13.DECLARE_RECIPES, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x54, 0x54, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(new PacketHandler() {
@@ -77,8 +70,8 @@ public class InventoryPackets {
                                 int ingredientsNo = wrapper.passthrough(Type.VAR_INT);
                                 for (int i1 = 0; i1 < ingredientsNo; i1++) {
                                     Item[] items = wrapper.passthrough(Type.FLAT_ITEM_ARRAY_VAR_INT);
-                                    for (int i2 = 0; i2 < items.length; i2++) {
+                                    for (Item item : items) {
-                                        InventoryPackets.toClient(items[i2]);
+                                        InventoryPackets.toClient(item);
                                     }
                                 }
                                 InventoryPackets.toClient(wrapper.passthrough(Type.FLAT_ITEM)); // Result
@@ -87,8 +80,8 @@ public class InventoryPackets {
                                 wrapper.passthrough(Type.STRING); // Group
                                 for (int i1 = 0; i1 < ingredientsNo; i1++) {
                                     Item[] items = wrapper.passthrough(Type.FLAT_ITEM_ARRAY_VAR_INT);
-                                    for (int i2 = 0; i2 < items.length; i2++) {
+                                    for (Item item : items) {
-                                        InventoryPackets.toClient(items[i2]);
+                                        InventoryPackets.toClient(item);
                                     }
                                 }
                                 InventoryPackets.toClient(wrapper.passthrough(Type.FLAT_ITEM)); // Result
@@ -96,8 +89,8 @@ public class InventoryPackets {
                                 wrapper.passthrough(Type.STRING); // Group
                                 // Ingredient start
                                 Item[] items = wrapper.passthrough(Type.FLAT_ITEM_ARRAY_VAR_INT);
-                                for (int i2 = 0; i2 < items.length; i2++) {
+                                for (Item item : items) {
-                                    InventoryPackets.toClient(items[i2]);
+                                    InventoryPackets.toClient(item);
                                 }
                                 // Ingredient end
                                 InventoryPackets.toClient(wrapper.passthrough(Type.FLAT_ITEM));
@@ -110,12 +103,8 @@ public class InventoryPackets {
             }
         });
 
-
+        itemRewriter.registerClickWindow(Type.FLAT_ITEM, ServerboundPackets1_13.CLICK_WINDOW);
-        // Click window packet
+        itemRewriter.registerCreativeInvAction(Type.FLAT_ITEM, ServerboundPackets1_13.CREATIVE_INVENTORY_ACTION);
-        itemRewriter.registerClickWindow(Type.FLAT_ITEM, 0x08, 0x08);
-
-        // Creative Inventory Action
-        itemRewriter.registerCreativeInvAction(Type.FLAT_ITEM, 0x24, 0x24);
     }
 
     public static void toClient(Item item) {

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13_1to1_13/packets/WorldPackets.java

@@ -8,8 +8,8 @@ import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.rewriters.BlockRewriter;
 import us.myles.ViaVersion.api.type.Type;
-import us.myles.ViaVersion.packets.State;
 import us.myles.ViaVersion.protocols.protocol1_13_1to1_13.Protocol1_13_1To1_13;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
 import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.types.Chunk1_13Type;
 import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
 
@@ -18,8 +18,7 @@ public class WorldPackets {
     public static void register(Protocol protocol) {
         BlockRewriter blockRewriter = new BlockRewriter(protocol, Type.POSITION, Protocol1_13_1To1_13::getNewBlockStateId, Protocol1_13_1To1_13::getNewBlockId);
 
-        //Chunk
+        protocol.registerOutgoing(ClientboundPackets1_13.CHUNK_DATA, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x22, 0x22, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(new PacketHandler() {
@@ -39,20 +38,12 @@ public class WorldPackets {
             }
         });
 
-        // Block action
+        blockRewriter.registerBlockAction(ClientboundPackets1_13.BLOCK_ACTION);
-        blockRewriter.registerBlockAction(0x0A, 0x0A);
+        blockRewriter.registerBlockChange(ClientboundPackets1_13.BLOCK_CHANGE);
+        blockRewriter.registerMultiBlockChange(ClientboundPackets1_13.MULTI_BLOCK_CHANGE);
+        blockRewriter.registerEffect(ClientboundPackets1_13.EFFECT, 1010, 2001, InventoryPackets::getNewItemId);
 
-        // Block Change
+        protocol.registerOutgoing(ClientboundPackets1_13.JOIN_GAME, new PacketRemapper() {
-        blockRewriter.registerBlockChange(0xB, 0xB);
-
-        // Multi Block Change
-        blockRewriter.registerMultiBlockChange(0xF, 0xF);
-
-        // Effect packet
-        blockRewriter.registerEffect(0x23, 0x23, 1010, 2001, InventoryPackets::getNewItemId);
-
-        //join game
-        protocol.registerOutgoing(State.PLAY, 0x25, 0x25, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.INT); // 0 - Entity ID
@@ -71,8 +62,7 @@ public class WorldPackets {
             }
         });
 
-        //respawn
+        protocol.registerOutgoing(ClientboundPackets1_13.RESPAWN, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x38, 0x38, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.INT); // 0 - Dimension ID
@@ -87,7 +77,6 @@ public class WorldPackets {
             }
         });
 
-        //spawn particle
+        blockRewriter.registerSpawnParticle(Type.FLOAT, ClientboundPackets1_13.SPAWN_PARTICLE, 3, 20, 27, InventoryPackets::toClient, Type.FLAT_ITEM);
-        blockRewriter.registerSpawnParticle(Type.FLOAT, 0x24, 0x24, 3, 20, 27, InventoryPackets::toClient, Type.FLAT_ITEM);
     }
 }

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13_2to1_13_1/Protocol1_13_2To1_13_1.java

@@ -6,29 +6,32 @@ import us.myles.ViaVersion.api.protocol.Protocol;
 import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.type.Type;
-import us.myles.ViaVersion.packets.State;
 import us.myles.ViaVersion.protocols.protocol1_13_2to1_13_1.packets.EntityPackets;
 import us.myles.ViaVersion.protocols.protocol1_13_2to1_13_1.packets.InventoryPackets;
 import us.myles.ViaVersion.protocols.protocol1_13_2to1_13_1.packets.WorldPackets;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ServerboundPackets1_13;
 
 public class Protocol1_13_2To1_13_1 extends Protocol {
 
+    public Protocol1_13_2To1_13_1() {
+        super(ClientboundPackets1_13.class, ClientboundPackets1_13.class, ServerboundPackets1_13.class, ServerboundPackets1_13.class);
+    }
+
     @Override
     protected void registerPackets() {
         InventoryPackets.register(this);
         WorldPackets.register(this);
         EntityPackets.register(this);
 
-        //Edit Book
+        registerIncoming(ServerboundPackets1_13.EDIT_BOOK, new PacketRemapper() {
-        registerIncoming(State.PLAY, 0x0B, 0x0B, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.FLAT_VAR_INT_ITEM, Type.FLAT_ITEM);
             }
         });
 
-        // Advancements
+        registerOutgoing(ClientboundPackets1_13.ADVANCEMENTS, new PacketRemapper() {
-        registerOutgoing(State.PLAY, 0x51, 0x51, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(new PacketHandler() {

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13_2to1_13_1/packets/EntityPackets.java

@@ -1,6 +1,5 @@
 package us.myles.ViaVersion.protocols.protocol1_13_2to1_13_1.packets;
 
-import us.myles.ViaVersion.api.PacketWrapper;
 import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
 import us.myles.ViaVersion.api.minecraft.metadata.types.MetaType1_13_2;
 import us.myles.ViaVersion.api.protocol.Protocol;
@@ -9,22 +8,18 @@ import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.api.type.types.version.Types1_13;
 import us.myles.ViaVersion.api.type.types.version.Types1_13_2;
-import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
 
 public class EntityPackets {
 
     public static void register(Protocol protocol) {
-        final PacketHandler metaTypeHandler = new PacketHandler() {
+        final PacketHandler metaTypeHandler = wrapper -> {
-            @Override
-            public void handle(PacketWrapper wrapper) throws Exception {
             for (Metadata metadata : wrapper.get(Types1_13_2.METADATA_LIST, 0)) {
                 metadata.setMetaType(MetaType1_13_2.byId(metadata.getMetaType().getTypeID()));
             }
-            }
         };
 
-        // Spawn mob packet
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_MOB, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x3, 0x3, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity ID
@@ -45,8 +40,7 @@ public class EntityPackets {
             }
         });
 
-        // Spawn player packet
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_PLAYER, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x05, 0x05, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity ID
@@ -62,9 +56,7 @@ public class EntityPackets {
             }
         });
 
-
+        protocol.registerOutgoing(ClientboundPackets1_13.ENTITY_METADATA, new PacketRemapper() {
-        // Metadata packet
-        protocol.registerOutgoing(State.PLAY, 0x3F, 0x3F, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity ID
@@ -74,5 +66,4 @@ public class EntityPackets {
             }
         });
     }
-
 }

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13_2to1_13_1/packets/InventoryPackets.java

@@ -5,13 +5,13 @@ import us.myles.ViaVersion.api.protocol.Protocol;
 import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.type.Type;
-import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ServerboundPackets1_13;
 
 public class InventoryPackets {
 
     public static void register(Protocol protocol) {
-        // Set slot packet
+        protocol.registerOutgoing(ClientboundPackets1_13.SET_SLOT, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x17, 0x17, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.BYTE); // 0 - Window ID
@@ -19,9 +19,7 @@ public class InventoryPackets {
                 map(Type.FLAT_ITEM, Type.FLAT_VAR_INT_ITEM); // 2 - Slot Value
             }
         });
-
+        protocol.registerOutgoing(ClientboundPackets1_13.WINDOW_ITEMS, new PacketRemapper() {
-        // Window items packet
-        protocol.registerOutgoing(State.PLAY, 0x15, 0x15, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.UNSIGNED_BYTE); // 0 - Window ID
@@ -29,8 +27,7 @@ public class InventoryPackets {
             }
         });
 
-        // Plugin message
+        protocol.registerOutgoing(ClientboundPackets1_13.PLUGIN_MESSAGE, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x19, 0x19, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.STRING); // Channel
@@ -63,8 +60,7 @@ public class InventoryPackets {
             }
         });
 
-        // Entity Equipment Packet
+        protocol.registerOutgoing(ClientboundPackets1_13.ENTITY_EQUIPMENT, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x42, 0x42, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity ID
@@ -73,8 +69,7 @@ public class InventoryPackets {
             }
         });
 
-        // Declare Recipes
+        protocol.registerOutgoing(ClientboundPackets1_13.DECLARE_RECIPES, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x54, 0x54, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(new PacketHandler() {
@@ -113,8 +108,7 @@ public class InventoryPackets {
             }
         });
 
-        // Click window packet
+        protocol.registerIncoming(ServerboundPackets1_13.CLICK_WINDOW, new PacketRemapper() {
-        protocol.registerIncoming(State.PLAY, 0x08, 0x08, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.UNSIGNED_BYTE); // 0 - Window ID
@@ -124,17 +118,13 @@ public class InventoryPackets {
                 map(Type.VAR_INT); // 4 - Mode
                 map(Type.FLAT_VAR_INT_ITEM, Type.FLAT_ITEM); // 5 - Clicked Item
             }
-                }
+        });
-        );
+        protocol.registerIncoming(ServerboundPackets1_13.CREATIVE_INVENTORY_ACTION, new PacketRemapper() {
-
-        // Creative Inventory Action
-        protocol.registerIncoming(State.PLAY, 0x24, 0x24, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.SHORT); // 0 - Slot
                 map(Type.FLAT_VAR_INT_ITEM, Type.FLAT_ITEM); // 1 - Clicked Item
             }
-                }
+        });
-        );
     }
 }

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13_2to1_13_1/packets/WorldPackets.java

@@ -5,13 +5,12 @@ import us.myles.ViaVersion.api.protocol.Protocol;
 import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.type.Type;
-import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
 
 public class WorldPackets {
 
     public static void register(Protocol protocol) {
-        //spawn particle
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_PARTICLE, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x24, 0x24, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.INT); // 0 - Particle ID

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/ClientboundPackets1_13.java

@@ -0,0 +1,93 @@
+package us.myles.ViaVersion.protocols.protocol1_13to1_12_2;
+
+import us.myles.ViaVersion.api.protocol.ClientboundPacketType;
+
+public enum ClientboundPackets1_13 implements ClientboundPacketType {
+
+    SPAWN_ENTITY, // 0x00
+    SPAWN_EXPERIENCE_ORB, // 0x01
+    SPAWN_GLOBAL_ENTITY, // 0x02
+    SPAWN_MOB, // 0x03
+    SPAWN_PAINTING, // 0x04
+    SPAWN_PLAYER, // 0x05
+    ENTITY_ANIMATION, // 0x06
+    STATISTICS, // 0x07
+    BLOCK_BREAK_ANIMATION, // 0x08
+    BLOCK_ENTITY_DATA, // 0x09
+    BLOCK_ACTION, // 0x0A
+    BLOCK_CHANGE, // 0x0B
+    BOSSBAR, // 0x0C
+    SERVER_DIFFICULTY, // 0x0D
+    CHAT_MESSAGE, // 0x0E
+    MULTI_BLOCK_CHANGE, // 0x0F
+    TAB_COMPLETE, // 0x10
+    DECLARE_COMMANDS, // 0x11
+    WINDOW_CONFIRMATION, // 0x12
+    CLOSE_WINDOW, // 0x13
+    OPEN_WINDOW, // 0x14
+    WINDOW_ITEMS, // 0x15
+    WINDOW_PROPERTY, // 0x16
+    SET_SLOT, // 0x17
+    COOLDOWN, // 0x18
+    PLUGIN_MESSAGE, // 0x19
+    NAMED_SOUND, // 0x1A
+    DISCONNECT, // 0x1B
+    ENTITY_STATUS, // 0x1C
+    NBT_QUERY, // 0x1D
+    EXPLOSION, // 0x1E
+    UNLOAD_CHUNK, // 0x1F
+    GAME_EVENT, // 0x20
+    KEEP_ALIVE, // 0x21
+    CHUNK_DATA, // 0x22
+    EFFECT, // 0x23
+    SPAWN_PARTICLE, // 0x24
+    JOIN_GAME, // 0x25
+    MAP_DATA, // 0x26
+    ENTITY_MOVEMENT, // 0x27
+    ENTITY_POSITION, // 0x28
+    ENTITY_POSITION_AND_ROTATION, // 0x29
+    ENTITY_ROTATION, // 0x2A
+    VEHICLE_MOVE, // 0x2B
+    OPEN_SIGN_EDITOR, // 0x2C
+    CRAFT_RECIPE_RESPONSE, // 0x2D
+    PLAYER_ABILITIES, // 0x2E
+    COMBAT_EVENT, // 0x2F
+    PLAYER_INFO, // 0x30
+    FACE_PLAYER, // 0x31
+    PLAYER_POSITION, // 0x32
+    USE_BED, // 0x33
+    UNLOCK_RECIPES, // 0x34
+    DESTROY_ENTITIES, // 0x35
+    REMOVE_ENTITY_EFFECT, // 0x36
+    RESOURCE_PACK, // 0x37
+    RESPAWN, // 0x38
+    ENTITY_HEAD_LOOK, // 0x39
+    SELECT_ADVANCEMENTS_TAB, // 0x3A
+    WORLD_BORDER, // 0x3B
+    CAMERA, // 0x3C
+    HELD_ITEM_CHANGE, // 0x3D
+    DISPLAY_SCOREBOARD, // 0x3E
+    ENTITY_METADATA, // 0x3F
+    ATTACH_ENTITY, // 0x40
+    ENTITY_VELOCITY, // 0x41
+    ENTITY_EQUIPMENT, // 0x42
+    SET_EXPERIENCE, // 0x43
+    UPDATE_HEALTH, // 0x44
+    SCOREBOARD_OBJECTIVE, // 0x45
+    SET_PASSENGERS, // 0x46
+    TEAMS, // 0x47
+    UPDATE_SCORE, // 0x48
+    SPAWN_POSITION, // 0x49
+    TIME_UPDATE, // 0x4A
+    TITLE, // 0x4B
+    STOP_SOUND, // 0x4D
+    SOUND, // 0x4C
+    TAB_LIST, // 0x4E
+    COLLECT_ITEM, // 0x4F
+    ENTITY_TELEPORT, // 0x50
+    ADVANCEMENTS, // 0x51
+    ENTITY_PROPERTIES, // 0x52
+    ENTITY_EFFECT, // 0x53
+    DECLARE_RECIPES, // 0x54
+    TAGS, // 0x55
+}

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/Protocol1_13To1_12_2.java

@@ -11,6 +11,7 @@ import us.myles.ViaVersion.api.minecraft.Position;
 import us.myles.ViaVersion.api.minecraft.item.Item;
 import us.myles.ViaVersion.api.platform.providers.ViaProviders;
 import us.myles.ViaVersion.api.protocol.Protocol;
+import us.myles.ViaVersion.api.protocol.Protocol;
 import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.remapper.ValueCreator;

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/ServerboundPackets1_13.java

@@ -0,0 +1,50 @@
+package us.myles.ViaVersion.protocols.protocol1_13to1_12_2;
+
+import us.myles.ViaVersion.api.protocol.ServerboundPacketType;
+
+public enum ServerboundPackets1_13 implements ServerboundPacketType {
+
+    TELEPORT_CONFIRM, // 0x00
+    QUERY_BLOCK_NBT, // 0x01
+    CHAT_MESSAGE, // 0x02
+    CLIENT_STATUS, // 0x03
+    CLIENT_SETTINGS, // 0x04
+    TAB_COMPLETE, // 0x05
+    WINDOW_CONFIRMATION, // 0x06
+    CLICK_WINDOW_BUTTON, // 0x07
+    CLICK_WINDOW, // 0x08
+    CLOSE_WINDOW, // 0x09
+    PLUGIN_MESSAGE, // 0x0A
+    EDIT_BOOK, // 0x0B
+    ENTITY_NBT_REQUEST, // 0x0C
+    INTERACT_ENTITY, // 0x0D
+    KEEP_ALIVE, // 0x0E
+    PLAYER_MOVEMENT, // 0x12
+    PLAYER_POSITION, // 0x0F
+    PLAYER_POSITION_AND_ROTATION, // 0x10
+    PLAYER_ROTATION, // 0x11
+    VEHICLE_MOVE, // 0x13
+    STEER_BOAT, // 0x14
+    PICK_ITEM, // 0x15
+    CRAFT_RECIPE_REQUEST, // 0x16
+    PLAYER_ABILITIES, // 0x17
+    PLAYER_DIGGING, // 0x18
+    ENTITY_ACTION, // 0x19
+    STEER_VEHICLE, // 0x1A
+    RECIPE_BOOK_DATA, // 0x1B
+    RENAME_ITEM, // 0x1C
+    RESOURCE_PACK_STATUS, // 0x1D
+    ADVANCEMENT_TAB, // 0x1E
+    SELECT_TRADE, // 0x1F
+    SET_BEACON_EFFECT, // 0x20
+    HELD_ITEM_CHANGE, // 0x21
+    UPDATE_COMMAND_BLOCK, // 0x22
+    UPDATE_COMMAND_BLOCK_MINECART, // 0x23
+    CREATIVE_INVENTORY_ACTION, // 0x24
+    UPDATE_STRUCTURE_BLOCK, // 0x25
+    UPDATE_SIGN, // 0x26
+    ANIMATION, // 0x27
+    SPECTATE, // 0x28
+    PLAYER_BLOCK_PLACEMENT, // 0x29
+    USE_ITEM, // 0x2A
+}

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_13to1_12_2/packets/EntityPackets.java

@@ -2,18 +2,19 @@ package us.myles.ViaVersion.protocols.protocol1_13to1_12_2.packets;
 
 import us.myles.ViaVersion.api.PacketWrapper;
 import us.myles.ViaVersion.api.entities.Entity1_13Types;
-import us.myles.ViaVersion.api.protocol.Protocol;
 import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.api.type.types.version.Types1_12;
 import us.myles.ViaVersion.api.type.types.version.Types1_13;
 import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.Protocol1_13To1_12_2;
 import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.metadata.MetadataRewriter1_13To1_12_2;
 import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.storage.EntityTracker1_13;
 
 public class EntityPackets {
-    public static void register(final Protocol protocol) {
+
+    public static void register(Protocol1_13To1_12_2 protocol) {
         MetadataRewriter1_13To1_12_2 metadataRewriter = protocol.get(MetadataRewriter1_13To1_12_2.class);
 
         // Spawn Object

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_14_1to1_14/Protocol1_14_1To1_14.java

@@ -5,9 +5,15 @@ import us.myles.ViaVersion.api.protocol.Protocol;
 import us.myles.ViaVersion.protocols.protocol1_14_1to1_14.metadata.MetadataRewriter1_14_1To1_14;
 import us.myles.ViaVersion.protocols.protocol1_14_1to1_14.packets.EntityPackets;
 import us.myles.ViaVersion.protocols.protocol1_14_1to1_14.storage.EntityTracker1_14_1;
+import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.ClientboundPackets1_14;
+import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.ServerboundPackets1_14;
 
 public class Protocol1_14_1To1_14 extends Protocol {
 
+    public Protocol1_14_1To1_14() {
+        super(ClientboundPackets1_14.class, ClientboundPackets1_14.class, ServerboundPackets1_14.class, ServerboundPackets1_14.class);
+    }
+
     @Override
     protected void registerPackets() {
         new MetadataRewriter1_14_1To1_14(this);

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_14_1to1_14/packets/EntityPackets.java

@@ -1,20 +1,19 @@
 package us.myles.ViaVersion.protocols.protocol1_14_1to1_14.packets;
 
 import us.myles.ViaVersion.api.entities.Entity1_14Types;
-import us.myles.ViaVersion.api.protocol.Protocol;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.api.type.types.version.Types1_14;
-import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_14_1to1_14.Protocol1_14_1To1_14;
 import us.myles.ViaVersion.protocols.protocol1_14_1to1_14.metadata.MetadataRewriter1_14_1To1_14;
+import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.ClientboundPackets1_14;
 
 public class EntityPackets {
 
-    public static void register(final Protocol protocol) {
+    public static void register(Protocol1_14_1To1_14 protocol) {
         MetadataRewriter1_14_1To1_14 metadataRewriter = protocol.get(MetadataRewriter1_14_1To1_14.class);
 
-        // Spawn Mob
+        protocol.registerOutgoing(ClientboundPackets1_14.SPAWN_MOB, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x03, 0x03, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity ID
@@ -35,11 +34,9 @@ public class EntityPackets {
             }
         });
 
-        // Destroy entities
+        metadataRewriter.registerEntityDestroy(ClientboundPackets1_14.DESTROY_ENTITIES);
-        metadataRewriter.registerEntityDestroy(0x37, 0x37);
 
-        // Spawn Player
+        protocol.registerOutgoing(ClientboundPackets1_14.SPAWN_PLAYER, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x05, 0x05, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity ID
@@ -55,7 +52,6 @@ public class EntityPackets {
             }
         });
 
-        // Entity Metadata
+        metadataRewriter.registerMetadataRewriter(ClientboundPackets1_14.ENTITY_METADATA, Types1_14.METADATA_LIST);
-        metadataRewriter.registerMetadataRewriter(0x43, 0x43, Types1_14.METADATA_LIST);
     }
 }

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_14_2to1_14_1/Protocol1_14_2To1_14_1.java

@@ -1,17 +1,10 @@
 package us.myles.ViaVersion.protocols.protocol1_14_2to1_14_1;
 
-import us.myles.ViaVersion.api.data.UserConnection;
 import us.myles.ViaVersion.api.protocol.Protocol;
 
 public class Protocol1_14_2To1_14_1 extends Protocol {
 
     @Override
     protected void registerPackets() {
-
-	}
-
-	@Override
-	public void init(UserConnection userConnection) {
-
     }
 }

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_14to1_13_2/ClientboundPackets1_14.java

@@ -0,0 +1,100 @@
+package us.myles.ViaVersion.protocols.protocol1_14to1_13_2;
+
+import us.myles.ViaVersion.api.protocol.ClientboundPacketType;
+
+public enum ClientboundPackets1_14 implements ClientboundPacketType {
+
+    SPAWN_ENTITY, // 0x00
+    SPAWN_EXPERIENCE_ORB, // 0x01
+    SPAWN_GLOBAL_ENTITY, // 0x02
+    SPAWN_MOB, // 0x03
+    SPAWN_PAINTING, // 0x04
+    SPAWN_PLAYER, // 0x05
+    ENTITY_ANIMATION, // 0x06
+    STATISTICS, // 0x07
+    BLOCK_BREAK_ANIMATION, // 0x08
+    BLOCK_ENTITY_DATA, // 0x09
+    BLOCK_ACTION, // 0x0A
+    BLOCK_CHANGE, // 0x0B
+    BOSSBAR, // 0x0C
+    SERVER_DIFFICULTY, // 0x0D
+    CHAT_MESSAGE, // 0x0E
+    MULTI_BLOCK_CHANGE, // 0x0F
+    TAB_COMPLETE, // 0x10
+    DECLARE_COMMANDS, // 0x11
+    WINDOW_CONFIRMATION, // 0x12
+    CLOSE_WINDOW, // 0x13
+    WINDOW_ITEMS, // 0x14
+    WINDOW_PROPERTY, // 0x15
+    SET_SLOT, // 0x16
+    COOLDOWN, // 0x17
+    PLUGIN_MESSAGE, // 0x18
+    NAMED_SOUND, // 0x19
+    DISCONNECT, // 0x1A
+    ENTITY_STATUS, // 0x1B
+    EXPLOSION, // 0x1C
+    UNLOAD_CHUNK, // 0x1D
+    GAME_EVENT, // 0x1E
+    OPEN_HORSE_WINDOW, // 0x1F
+    KEEP_ALIVE, // 0x20
+    CHUNK_DATA, // 0x21
+    EFFECT, // 0x22
+    SPAWN_PARTICLE, // 0x23
+    UPDATE_LIGHT, // 0x24
+    JOIN_GAME, // 0x25
+    MAP_DATA, // 0x26
+    TRADE_LIST, // 0x27
+    ENTITY_POSITION, // 0x28
+    ENTITY_POSITION_AND_ROTATION, // 0x29
+    ENTITY_ROTATION, // 0x2A
+    ENTITY_MOVEMENT, // 0x2B
+    VEHICLE_MOVE, // 0x2C
+    OPEN_BOOK, // 0x2D
+    OPEN_WINDOW, // 0x2E
+    OPEN_SIGN_EDITOR, // 0x2F
+    CRAFT_RECIPE_RESPONSE, // 0x30
+    PLAYER_ABILITIES, // 0x31
+    COMBAT_EVENT, // 0x32
+    PLAYER_INFO, // 0x33
+    FACE_PLAYER, // 0x34
+    PLAYER_POSITION, // 0x35
+    UNLOCK_RECIPES, // 0x36
+    DESTROY_ENTITIES, // 0x37
+    REMOVE_ENTITY_EFFECT, // 0x38
+    RESOURCE_PACK, // 0x39
+    RESPAWN, // 0x3A
+    ENTITY_HEAD_LOOK, // 0x3B
+    SELECT_ADVANCEMENTS_TAB, // 0x3C
+    WORLD_BORDER, // 0x3D
+    CAMERA, // 0x3E
+    HELD_ITEM_CHANGE, // 0x3F
+    UPDATE_VIEW_POSITION, // 0x40
+    UPDATE_VIEW_DISTANCE, // 0x41
+    DISPLAY_SCOREBOARD, // 0x42
+    ENTITY_METADATA, // 0x43
+    ATTACH_ENTITY, // 0x44
+    ENTITY_VELOCITY, // 0x45
+    ENTITY_EQUIPMENT, // 0x46
+    SET_EXPERIENCE, // 0x47
+    UPDATE_HEALTH, // 0x48
+    SCOREBOARD_OBJECTIVE, // 0x49
+    SET_PASSENGERS, // 0x4A
+    TEAMS, // 0x4B
+    UPDATE_SCORE, // 0x4C
+    SPAWN_POSITION, // 0x4D
+    TIME_UPDATE, // 0x4E
+    TITLE, // 0x4F
+    ENTITY_SOUND, // 0x50
+    SOUND, // 0x51
+    STOP_SOUND, // 0x52
+    TAB_LIST, // 0x53
+    NBT_QUERY, // 0x54
+    COLLECT_ITEM, // 0x55
+    ENTITY_TELEPORT, // 0x56
+    ADVANCEMENTS, // 0x57
+    ENTITY_PROPERTIES, // 0x58
+    ENTITY_EFFECT, // 0x59
+    DECLARE_RECIPES, // 0x5A
+    TAGS, // 0x5B
+    ACKNOWLEDGE_PLAYER_DIGGING, // 0x5C
+}

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_14to1_13_2/Protocol1_14To1_13_2.java

@@ -8,7 +8,8 @@ import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.rewriters.SoundRewriter;
 import us.myles.ViaVersion.api.type.Type;
-import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ServerboundPackets1_13;
 import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.data.MappingData;
 import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.metadata.MetadataRewriter1_14To1_13_2;
 import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.packets.EntityPackets;
@@ -21,7 +22,7 @@ import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
 public class Protocol1_14To1_13_2 extends Protocol {
 
     public Protocol1_14To1_13_2() {
-        super(true);
+        super(ClientboundPackets1_13.class, ClientboundPackets1_14.class, ServerboundPackets1_13.class, ServerboundPackets1_14.class, true);
     }
 
     @Override
@@ -33,61 +34,9 @@ public class Protocol1_14To1_13_2 extends Protocol {
         WorldPackets.register(this);
         PlayerPackets.register(this);
 
-        registerOutgoing(State.PLAY, 0x16, 0x15);
+        new SoundRewriter(this, id -> MappingData.soundMappings.getNewId(id)).registerSound(ClientboundPackets1_13.SOUND);
 
-        registerOutgoing(State.PLAY, 0x1A, 0x19);
+        registerOutgoing(ClientboundPackets1_13.ADVANCEMENTS, new PacketRemapper() {
-        registerOutgoing(State.PLAY, 0x1B, 0x1A);
-        registerOutgoing(State.PLAY, 0x1C, 0x1B);
-        registerOutgoing(State.PLAY, 0x1D, 0x54);
-        registerOutgoing(State.PLAY, 0x1F, 0x1D);
-        registerOutgoing(State.PLAY, 0x20, 0x1E);
-        registerOutgoing(State.PLAY, 0x21, 0x20);
-
-        registerOutgoing(State.PLAY, 0x27, 0x2B);
-
-        registerOutgoing(State.PLAY, 0x2B, 0x2C);
-
-        registerOutgoing(State.PLAY, 0x2D, 0x30);
-        registerOutgoing(State.PLAY, 0x2E, 0x31);
-        registerOutgoing(State.PLAY, 0x2F, 0x32);
-        registerOutgoing(State.PLAY, 0x30, 0x33);
-        registerOutgoing(State.PLAY, 0x31, 0x34);
-        // Position and look
-        registerOutgoing(State.PLAY, 0x32, 0x35);
-
-        registerOutgoing(State.PLAY, 0x34, 0x36);
-
-        registerOutgoing(State.PLAY, 0x36, 0x38);
-        registerOutgoing(State.PLAY, 0x37, 0x39);
-
-        registerOutgoing(State.PLAY, 0x39, 0x3B);
-        registerOutgoing(State.PLAY, 0x3A, 0x3C);
-        registerOutgoing(State.PLAY, 0x3B, 0x3D);
-        registerOutgoing(State.PLAY, 0x3C, 0x3E);
-        registerOutgoing(State.PLAY, 0x3D, 0x3F);
-        registerOutgoing(State.PLAY, 0x3E, 0x42);
-
-        registerOutgoing(State.PLAY, 0x40, 0x44);
-        registerOutgoing(State.PLAY, 0x41, 0x45);
-
-        registerOutgoing(State.PLAY, 0x43, 0x47);
-        registerOutgoing(State.PLAY, 0x44, 0x48);
-        registerOutgoing(State.PLAY, 0x45, 0x49);
-        registerOutgoing(State.PLAY, 0x46, 0x4A);
-        registerOutgoing(State.PLAY, 0x47, 0x4B);
-        registerOutgoing(State.PLAY, 0x48, 0x4C);
-
-        registerOutgoing(State.PLAY, 0x4A, 0x4E);
-        registerOutgoing(State.PLAY, 0x4B, 0x4F);
-        registerOutgoing(State.PLAY, 0x4C, 0x52);
-
-        new SoundRewriter(this, id -> MappingData.soundMappings.getNewId(id)).registerSound(0x4D, 0x51);
-
-        registerOutgoing(State.PLAY, 0x4E, 0x53);
-        registerOutgoing(State.PLAY, 0x4F, 0x55);
-        registerOutgoing(State.PLAY, 0x50, 0x56);
-
-        registerOutgoing(State.PLAY, 0x51, 0x57, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(new PacketHandler() {
@@ -128,10 +77,7 @@ public class Protocol1_14To1_13_2 extends Protocol {
             }
         });
 
-        registerOutgoing(State.PLAY, 0x52, 0x58);
+        registerOutgoing(ClientboundPackets1_13.TAGS, new PacketRemapper() {
-        registerOutgoing(State.PLAY, 0x53, 0x59);
-
-        registerOutgoing(State.PLAY, 0x55, 0x5B, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(new PacketHandler() {
@@ -194,54 +140,12 @@ public class Protocol1_14To1_13_2 extends Protocol {
             }
         });
 
-        //Set Difficulty packet added in 19w11a
+        // Set Difficulty packet added in 19w11a
-        cancelIncoming(State.PLAY, 0x02);
+        cancelIncoming(ServerboundPackets1_14.SET_DIFFICULTY);
-
+        // Lock Difficulty packet added in 19w11a
-        registerIncoming(State.PLAY, 0x02, 0x03);
+        cancelIncoming(ServerboundPackets1_14.LOCK_DIFFICULTY);
-        registerIncoming(State.PLAY, 0x03, 0x04);
+        // Unknown packet added in 19w13a
-        registerIncoming(State.PLAY, 0x04, 0x05);
+        cancelIncoming(ServerboundPackets1_14.UPDATE_JIGSAW_BLOCK);
-        registerIncoming(State.PLAY, 0x05, 0x06);
-        registerIncoming(State.PLAY, 0x06, 0x07);
-        registerIncoming(State.PLAY, 0x07, 0x08);
-
-        registerIncoming(State.PLAY, 0x09, 0x0A);
-        registerIncoming(State.PLAY, 0x0A, 0x0B);
-
-        registerIncoming(State.PLAY, 0x0C, 0x0D);
-        registerIncoming(State.PLAY, 0x0D, 0x0E);
-
-        //Lock Difficulty packet added in 19w11a
-        cancelIncoming(State.PLAY, 0x10);
-
-        registerIncoming(State.PLAY, 0x0E, 0x0F);
-        registerIncoming(State.PLAY, 0x0F, 0x14);
-        registerIncoming(State.PLAY, 0x10, 0x11);
-        registerIncoming(State.PLAY, 0x11, 0x12);
-        registerIncoming(State.PLAY, 0x12, 0x13);
-        registerIncoming(State.PLAY, 0x13, 0x15);
-        registerIncoming(State.PLAY, 0x14, 0x16);
-        registerIncoming(State.PLAY, 0x15, 0x17);
-        registerIncoming(State.PLAY, 0x16, 0x18);
-        registerIncoming(State.PLAY, 0x17, 0x19);
-
-        registerIncoming(State.PLAY, 0x19, 0x1B);
-        registerIncoming(State.PLAY, 0x1A, 0x1C);
-
-        registerIncoming(State.PLAY, 0x1C, 0x1E);
-        registerIncoming(State.PLAY, 0x1D, 0x1F);
-        registerIncoming(State.PLAY, 0x1E, 0x20);
-        registerIncoming(State.PLAY, 0x20, 0x22);
-        registerIncoming(State.PLAY, 0x21, 0x23);
-
-        registerIncoming(State.PLAY, 0x23, 0x25);
-
-        //Unknown packet added in 19w13a
-        cancelIncoming(State.PLAY, 0x27);
-
-        registerIncoming(State.PLAY, 0x27, 0x2A);
-        registerIncoming(State.PLAY, 0x28, 0x2B);
-
-        registerIncoming(State.PLAY, 0x2A, 0x2D);
     }
 
     @Override

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_14to1_13_2/ServerboundPackets1_14.java

@@ -0,0 +1,53 @@
+package us.myles.ViaVersion.protocols.protocol1_14to1_13_2;
+
+import us.myles.ViaVersion.api.protocol.ServerboundPacketType;
+
+public enum ServerboundPackets1_14 implements ServerboundPacketType {
+
+    TELEPORT_CONFIRM, // 0x00
+    QUERY_BLOCK_NBT, // 0x01
+    SET_DIFFICULTY, // 0x02
+    CHAT_MESSAGE, // 0x03
+    CLIENT_STATUS, // 0x04
+    CLIENT_SETTINGS, // 0x05
+    TAB_COMPLETE, // 0x06
+    WINDOW_CONFIRMATION, // 0x07
+    CLICK_WINDOW_BUTTON, // 0x08
+    CLICK_WINDOW, // 0x09
+    CLOSE_WINDOW, // 0x0A
+    PLUGIN_MESSAGE, // 0x0B
+    EDIT_BOOK, // 0x0C
+    ENTITY_NBT_REQUEST, // 0x0D
+    INTERACT_ENTITY, // 0x0E
+    KEEP_ALIVE, // 0x0F
+    LOCK_DIFFICULTY, // 0x10
+    PLAYER_POSITION, // 0x11
+    PLAYER_POSITION_AND_ROTATION, // 0x12
+    PLAYER_ROTATION, // 0x13
+    PLAYER_MOVEMENT, // 0x14
+    VEHICLE_MOVE, // 0x15
+    STEER_BOAT, // 0x16
+    PICK_ITEM, // 0x17
+    CRAFT_RECIPE_REQUEST, // 0x18
+    PLAYER_ABILITIES, // 0x19
+    PLAYER_DIGGING, // 0x1A
+    ENTITY_ACTION, // 0x1B
+    STEER_VEHICLE, // 0x1C
+    RECIPE_BOOK_DATA, // 0x1D
+    RENAME_ITEM, // 0x1E
+    RESOURCE_PACK_STATUS, // 0x1F
+    ADVANCEMENT_TAB, // 0x20
+    SELECT_TRADE, // 0x21
+    SET_BEACON_EFFECT, // 0x22
+    HELD_ITEM_CHANGE, // 0x23
+    UPDATE_COMMAND_BLOCK, // 0x24
+    UPDATE_COMMAND_BLOCK_MINECART, // 0x25
+    CREATIVE_INVENTORY_ACTION, // 0x26
+    UPDATE_JIGSAW_BLOCK, // 0x27
+    UPDATE_STRUCTURE_BLOCK, // 0x28
+    UPDATE_SIGN, // 0x29
+    ANIMATION, // 0x2A
+    SPECTATE, // 0x2B
+    PLAYER_BLOCK_PLACEMENT, // 0x2C
+    USE_ITEM, // 0x2D
+}

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_14to1_13_2/packets/EntityPackets.java

@@ -6,13 +6,13 @@ import us.myles.ViaVersion.api.entities.Entity1_14Types;
 import us.myles.ViaVersion.api.minecraft.Position;
 import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
 import us.myles.ViaVersion.api.minecraft.metadata.types.MetaType1_14;
-import us.myles.ViaVersion.api.protocol.Protocol;
 import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.api.type.types.version.Types1_13_2;
 import us.myles.ViaVersion.api.type.types.version.Types1_14;
-import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
+import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.ClientboundPackets1_14;
 import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.Protocol1_14To1_13_2;
 import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.data.EntityTypeRewriter;
 import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.metadata.MetadataRewriter1_14To1_13_2;
@@ -23,11 +23,10 @@ import java.util.List;
 
 public class EntityPackets {
 
-    public static void register(final Protocol protocol) {
+    public static void register(Protocol1_14To1_13_2 protocol) {
         MetadataRewriter1_14To1_13_2 metadataRewriter = protocol.get(MetadataRewriter1_14To1_13_2.class);
 
-        // Spawn entity
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_ENTITY, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x00, 0x00, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity id
@@ -104,8 +103,7 @@ public class EntityPackets {
             }
         });
 
-        // Spawn mob packet
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_MOB, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x03, 0x03, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity ID
@@ -126,8 +124,7 @@ public class EntityPackets {
             }
         });
 
-        // Spawn painting
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_PAINTING, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x04, 0x04, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT);
@@ -138,8 +135,7 @@ public class EntityPackets {
             }
         });
 
-        // Spawn player packet
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_PLAYER, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x05, 0x05, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity ID
@@ -155,8 +151,7 @@ public class EntityPackets {
             }
         });
 
-        // Animation
+        protocol.registerOutgoing(ClientboundPackets1_13.ENTITY_ANIMATION, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x06, 0x06, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT);
@@ -184,8 +179,7 @@ public class EntityPackets {
             }
         });
 
-        // Use bed
+        protocol.registerOutgoing(ClientboundPackets1_13.USE_BED, ClientboundPackets1_14.ENTITY_METADATA, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x33, 0x43, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT);
@@ -208,10 +202,7 @@ public class EntityPackets {
             }
         });
 
-        // Destroy entities
+        metadataRewriter.registerEntityDestroy(ClientboundPackets1_13.DESTROY_ENTITIES);
-        metadataRewriter.registerEntityDestroy(0x35, 0x37);
+        metadataRewriter.registerMetadataRewriter(ClientboundPackets1_13.ENTITY_METADATA, Types1_13_2.METADATA_LIST, Types1_14.METADATA_LIST);
-
-        // Metadata packet
-        metadataRewriter.registerMetadataRewriter(0x3F, 0x43, Types1_13_2.METADATA_LIST, Types1_14.METADATA_LIST);
     }
 }

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_14to1_13_2/packets/InventoryPackets.java

@@ -1,7 +1,11 @@
 package us.myles.ViaVersion.protocols.protocol1_14to1_13_2.packets;
 
 import com.github.steveice10.opennbt.conversion.ConverterRegistry;
-import com.github.steveice10.opennbt.tag.builtin.*;
+import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
+import com.github.steveice10.opennbt.tag.builtin.DoubleTag;
+import com.github.steveice10.opennbt.tag.builtin.ListTag;
+import com.github.steveice10.opennbt.tag.builtin.StringTag;
+import com.github.steveice10.opennbt.tag.builtin.Tag;
 import com.google.common.collect.Sets;
 import us.myles.ViaVersion.api.PacketWrapper;
 import us.myles.ViaVersion.api.Via;
@@ -11,10 +15,11 @@ import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.rewriters.ItemRewriter;
 import us.myles.ViaVersion.api.type.Type;
-import us.myles.ViaVersion.packets.State;
 import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ChatRewriter;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
 import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.InventoryNameRewriter;
 import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.Protocol1_14To1_13_2;
+import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.ServerboundPackets1_14;
 import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.data.MappingData;
 import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.storage.EntityTracker1_14;
 
@@ -28,11 +33,9 @@ public class InventoryPackets {
     public static void register(Protocol protocol) {
         ItemRewriter itemRewriter = new ItemRewriter(protocol, InventoryPackets::toClient, InventoryPackets::toServer);
 
-        // Set cooldown
+        itemRewriter.registerSetCooldown(ClientboundPackets1_13.COOLDOWN, InventoryPackets::getNewItemId);
-        itemRewriter.registerSetCooldown(0x18, 0x17, InventoryPackets::getNewItemId);
 
-        // Open Inventory
+        protocol.registerOutgoing(ClientboundPackets1_13.OPEN_WINDOW, null, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x14, -1, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(new PacketHandler() {
@@ -105,14 +108,10 @@ public class InventoryPackets {
             }
         });
 
-        // Window items packet
+        itemRewriter.registerWindowItems(Type.FLAT_VAR_INT_ITEM_ARRAY, ClientboundPackets1_13.WINDOW_ITEMS);
-        itemRewriter.registerWindowItems(Type.FLAT_VAR_INT_ITEM_ARRAY, 0x15, 0x14);
+        itemRewriter.registerSetSlot(Type.FLAT_VAR_INT_ITEM, ClientboundPackets1_13.SET_SLOT);
 
-        // Set slot packet
+        protocol.registerOutgoing(ClientboundPackets1_13.PLUGIN_MESSAGE, new PacketRemapper() {
-        itemRewriter.registerSetSlot(Type.FLAT_VAR_INT_ITEM, 0x17, 0x16);
-
-        // Plugin message
-        protocol.registerOutgoing(State.PLAY, 0x19, 0x18, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.STRING); // Channel
@@ -164,11 +163,9 @@ public class InventoryPackets {
             }
         });
 
-        // Entity Equipment Packet
+        itemRewriter.registerEntityEquipment(Type.FLAT_VAR_INT_ITEM, ClientboundPackets1_13.ENTITY_EQUIPMENT);
-        itemRewriter.registerEntityEquipment(Type.FLAT_VAR_INT_ITEM, 0x42, 0x46);
 
-        // Declare Recipes
+        protocol.registerOutgoing(ClientboundPackets1_13.DECLARE_RECIPES, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x54, 0x5A, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(new PacketHandler() {
@@ -218,11 +215,9 @@ public class InventoryPackets {
         });
 
 
-        // Click window packet
+        itemRewriter.registerClickWindow(Type.FLAT_VAR_INT_ITEM, ServerboundPackets1_14.CLICK_WINDOW);
-        itemRewriter.registerClickWindow(Type.FLAT_VAR_INT_ITEM, 0x08, 0x09);
 
-        // Select trade
+        protocol.registerIncoming(ServerboundPackets1_14.SELECT_TRADE, new PacketRemapper() {
-        protocol.registerIncoming(State.PLAY, 0x1F, 0x21, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(new PacketHandler() {
@@ -244,11 +239,9 @@ public class InventoryPackets {
             }
         });
 
-        // Creative Inventory Action
+        itemRewriter.registerCreativeInvAction(Type.FLAT_VAR_INT_ITEM, ServerboundPackets1_14.CREATIVE_INVENTORY_ACTION);
-        itemRewriter.registerCreativeInvAction(Type.FLAT_VAR_INT_ITEM, 0x24, 0x26);
     }
 
-
     public static void toClient(Item item) {
         if (item == null) return;
         item.setIdentifier(getNewItemId(item.getIdentifier()));

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_14to1_13_2/packets/PlayerPackets.java

@@ -11,22 +11,20 @@ import us.myles.ViaVersion.api.protocol.Protocol;
 import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.type.Type;
-import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
+import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.ServerboundPackets1_14;
 
 public class PlayerPackets {
 
     public static void register(Protocol protocol) {
-
+        protocol.registerOutgoing(ClientboundPackets1_13.OPEN_SIGN_EDITOR, new PacketRemapper() {
-        // Open Sign Editor
-        protocol.registerOutgoing(State.PLAY, 0x2C, 0x2F, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.POSITION, Type.POSITION1_14);
             }
         });
 
-        // Query Block NBT
+        protocol.registerIncoming(ServerboundPackets1_14.QUERY_BLOCK_NBT, new PacketRemapper() {
-        protocol.registerIncoming(State.PLAY, 0x01, 0x01, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT);
@@ -34,14 +32,13 @@ public class PlayerPackets {
             }
         });
 
-        // Edit Book
+        protocol.registerIncoming(ServerboundPackets1_14.EDIT_BOOK, new PacketRemapper() {
-        protocol.registerIncoming(State.PLAY, 0x0B, 0x0C, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(new PacketHandler() {
                     @Override
                     public void handle(PacketWrapper wrapper) throws Exception {
-                        final Item item = wrapper.passthrough(Type.FLAT_VAR_INT_ITEM);
+                        Item item = wrapper.passthrough(Type.FLAT_VAR_INT_ITEM);
                         InventoryPackets.toServer(item);
 
                         // Client limit when editing a book was upped from 50 to 100 in 1.14, but some anti-exploit plugins ban with a size higher than the old client limit
@@ -63,8 +60,7 @@ public class PlayerPackets {
             }
         });
 
-        // Player Digging
+        protocol.registerIncoming(ServerboundPackets1_14.PLAYER_DIGGING, new PacketRemapper() {
-        protocol.registerIncoming(State.PLAY, 0x18, 0x1A, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT);
@@ -73,8 +69,7 @@ public class PlayerPackets {
             }
         });
 
-        // Recipe Book Data
+        protocol.registerIncoming(ServerboundPackets1_14.RECIPE_BOOK_DATA, new PacketRemapper() {
-        protocol.registerIncoming(State.PLAY, 0x1B, 0x1D, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT);
@@ -101,32 +96,26 @@ public class PlayerPackets {
             }
         });
 
-        // Update Command Block
+        protocol.registerIncoming(ServerboundPackets1_14.UPDATE_COMMAND_BLOCK, new PacketRemapper() {
-        protocol.registerIncoming(State.PLAY, 0x22, 0x24, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.POSITION1_14, Type.POSITION);
+            }
+        });
+        protocol.registerIncoming(ServerboundPackets1_14.UPDATE_STRUCTURE_BLOCK, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.POSITION1_14, Type.POSITION);
+            }
+        });
+        protocol.registerIncoming(ServerboundPackets1_14.UPDATE_SIGN, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.POSITION1_14, Type.POSITION);
             }
         });
 
-        // Update Structure Block
+        protocol.registerIncoming(ServerboundPackets1_14.PLAYER_BLOCK_PLACEMENT, new PacketRemapper() {
-        protocol.registerIncoming(State.PLAY, 0x25, 0x28, new PacketRemapper() {
-            @Override
-            public void registerMap() {
-                map(Type.POSITION1_14, Type.POSITION);
-            }
-        });
-
-        // Update Sign
-        protocol.registerIncoming(State.PLAY, 0x26, 0x29, new PacketRemapper() {
-            @Override
-            public void registerMap() {
-                map(Type.POSITION1_14, Type.POSITION);
-            }
-        });
-
-        // Player Block Placement
-        protocol.registerIncoming(State.PLAY, 0x29, 0x2C, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(new PacketHandler() {

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_14to1_13_2/packets/WorldPackets.java

@@ -15,7 +15,7 @@ import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.remapper.ValueCreator;
 import us.myles.ViaVersion.api.rewriters.BlockRewriter;
 import us.myles.ViaVersion.api.type.Type;
-import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
 import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.types.Chunk1_13Type;
 import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.Protocol1_14To1_13_2;
 import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.data.MappingData;
@@ -41,8 +41,7 @@ public class WorldPackets {
     public static void register(final Protocol protocol) {
         BlockRewriter blockRewriter = new BlockRewriter(protocol, null, Protocol1_14To1_13_2::getNewBlockStateId, Protocol1_14To1_13_2::getNewBlockId);
 
-        // Block Break Animation
+        protocol.registerOutgoing(ClientboundPackets1_13.BLOCK_BREAK_ANIMATION, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x08, 0x08, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT);
@@ -50,17 +49,13 @@ public class WorldPackets {
                 map(Type.BYTE);
             }
         });
-
+        protocol.registerOutgoing(ClientboundPackets1_13.BLOCK_ENTITY_DATA, new PacketRemapper() {
-        // Update Block Entity
-        protocol.registerOutgoing(State.PLAY, 0x09, 0x09, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.POSITION, Type.POSITION1_14);
             }
         });
-
+        protocol.registerOutgoing(ClientboundPackets1_13.BLOCK_ACTION, new PacketRemapper() {
-        // Block Action
-        protocol.registerOutgoing(State.PLAY, 0x0A, 0x0A, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.POSITION, Type.POSITION1_14); // Location
@@ -75,9 +70,7 @@ public class WorldPackets {
                 });
             }
         });
-
+        protocol.registerOutgoing(ClientboundPackets1_13.BLOCK_CHANGE, new PacketRemapper() {
-        // Block Change
-        protocol.registerOutgoing(State.PLAY, 0x0B, 0x0B, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.POSITION, Type.POSITION1_14);
@@ -93,8 +86,7 @@ public class WorldPackets {
             }
         });
 
-        // Server Difficulty
+        protocol.registerOutgoing(ClientboundPackets1_13.SERVER_DIFFICULTY, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x0D, 0x0D, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.UNSIGNED_BYTE);
@@ -107,11 +99,9 @@ public class WorldPackets {
             }
         });
 
-        // Multi Block Change
+        blockRewriter.registerMultiBlockChange(ClientboundPackets1_13.MULTI_BLOCK_CHANGE);
-        blockRewriter.registerMultiBlockChange(0x0F, 0x0F);
 
-        // Explosion
+        protocol.registerOutgoing(ClientboundPackets1_13.EXPLOSION, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x1E, 0x1C, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.FLOAT); // X
@@ -134,8 +124,7 @@ public class WorldPackets {
             }
         });
 
-        // Chunk
+        protocol.registerOutgoing(ClientboundPackets1_13.CHUNK_DATA, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x22, 0x21, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(new PacketHandler() {
@@ -264,8 +253,7 @@ public class WorldPackets {
             }
         });
 
-        // Effect
+        protocol.registerOutgoing(ClientboundPackets1_13.EFFECT, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x23, 0x22, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.INT); // Effect Id
@@ -286,12 +274,10 @@ public class WorldPackets {
             }
         });
 
-        // Spawn particle
+        blockRewriter.registerSpawnParticle(Type.FLOAT, ClientboundPackets1_13.SPAWN_PARTICLE, 3, 20, 27,
-        blockRewriter.registerSpawnParticle(Type.FLOAT, 0x24, 0x23, 3, 20, 27,
                 MetadataRewriter1_14To1_13_2::getNewParticleId, InventoryPackets::toClient, Type.FLAT_VAR_INT_ITEM);
 
-        // Join Game
+        protocol.registerOutgoing(ClientboundPackets1_13.JOIN_GAME, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x25, 0x25, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.INT); // 0 - Entity ID
@@ -334,8 +320,7 @@ public class WorldPackets {
             }
         });
 
-        // Map Data
+        protocol.registerOutgoing(ClientboundPackets1_13.MAP_DATA, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x26, 0x26, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT);
@@ -350,8 +335,7 @@ public class WorldPackets {
             }
         });
 
-        // Respawn
+        protocol.registerOutgoing(ClientboundPackets1_13.RESPAWN, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x38, 0x3A, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.INT); // 0 - Dimension ID
@@ -379,8 +363,7 @@ public class WorldPackets {
             }
         });
 
-        // Spawn Position
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_POSITION, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x49, 0x4D, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.POSITION, Type.POSITION1_14);

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_15to1_14_4/ClientboundPackets1_15.java

@@ -0,0 +1,100 @@
+package us.myles.ViaVersion.protocols.protocol1_15to1_14_4;
+
+import us.myles.ViaVersion.api.protocol.ClientboundPacketType;
+
+public enum ClientboundPackets1_15 implements ClientboundPacketType {
+
+    SPAWN_ENTITY, // 0x00
+    SPAWN_EXPERIENCE_ORB, // 0x01
+    SPAWN_GLOBAL_ENTITY, // 0x02
+    SPAWN_MOB, // 0x03
+    SPAWN_PAINTING, // 0x04
+    SPAWN_PLAYER, // 0x05
+    ENTITY_ANIMATION, // 0x06
+    STATISTICS, // 0x07
+    ACKNOWLEDGE_PLAYER_DIGGING, // 0x08
+    BLOCK_BREAK_ANIMATION, // 0x09
+    BLOCK_ENTITY_DATA, // 0x0A
+    BLOCK_ACTION, // 0x0B
+    BLOCK_CHANGE, // 0x0C
+    BOSSBAR, // 0x0D
+    SERVER_DIFFICULTY, // 0x0E
+    CHAT_MESSAGE, // 0x0F
+    MULTI_BLOCK_CHANGE, // 0x10
+    TAB_COMPLETE, // 0x11
+    DECLARE_COMMANDS, // 0x12
+    WINDOW_CONFIRMATION, // 0x13
+    CLOSE_WINDOW, // 0x14
+    WINDOW_ITEMS, // 0x15
+    WINDOW_PROPERTY, // 0x16
+    SET_SLOT, // 0x17
+    COOLDOWN, // 0x18
+    PLUGIN_MESSAGE, // 0x19
+    NAMED_SOUND, // 0x1A
+    DISCONNECT, // 0x1B
+    ENTITY_STATUS, // 0x1C
+    EXPLOSION, // 0x1D
+    UNLOAD_CHUNK, // 0x1E
+    GAME_EVENT, // 0x1F
+    OPEN_HORSE_WINDOW, // 0x20
+    KEEP_ALIVE, // 0x21
+    CHUNK_DATA, // 0x22
+    EFFECT, // 0x23
+    SPAWN_PARTICLE, // 0x24
+    UPDATE_LIGHT, // 0x25
+    JOIN_GAME, // 0x26
+    MAP_DATA, // 0x27
+    TRADE_LIST, // 0x28
+    ENTITY_POSITION, // 0x29
+    ENTITY_POSITION_AND_ROTATION, // 0x2A
+    ENTITY_ROTATION, // 0x2B
+    ENTITY_MOVEMENT, // 0x2C
+    VEHICLE_MOVE, // 0x2D
+    OPEN_BOOK, // 0x2E
+    OPEN_WINDOW, // 0x2F
+    OPEN_SIGN_EDITOR, // 0x30
+    CRAFT_RECIPE_RESPONSE, // 0x31
+    PLAYER_ABILITIES, // 0x32
+    COMBAT_EVENT, // 0x33
+    PLAYER_INFO, // 0x34
+    FACE_PLAYER, // 0x35
+    PLAYER_POSITION, // 0x36
+    UNLOCK_RECIPES, // 0x37
+    DESTROY_ENTITIES, // 0x38
+    REMOVE_ENTITY_EFFECT, // 0x39
+    RESOURCE_PACK, // 0x3A
+    RESPAWN, // 0x3B
+    ENTITY_HEAD_LOOK, // 0x3C
+    SELECT_ADVANCEMENTS_TAB, // 0x3D
+    WORLD_BORDER, // 0x3E
+    CAMERA, // 0x3F
+    HELD_ITEM_CHANGE, // 0x40
+    UPDATE_VIEW_POSITION, // 0x41
+    UPDATE_VIEW_DISTANCE, // 0x42
+    DISPLAY_SCOREBOARD, // 0x43
+    ENTITY_METADATA, // 0x44
+    ATTACH_ENTITY, // 0x45
+    ENTITY_VELOCITY, // 0x46
+    ENTITY_EQUIPMENT, // 0x47
+    SET_EXPERIENCE, // 0x48
+    UPDATE_HEALTH, // 0x49
+    SCOREBOARD_OBJECTIVE, // 0x4A
+    SET_PASSENGERS, // 0x4B
+    TEAMS, // 0x4C
+    UPDATE_SCORE, // 0x4D
+    SPAWN_POSITION, // 0x4E
+    TIME_UPDATE, // 0x4F
+    TITLE, // 0x50
+    ENTITY_SOUND, // 0x51
+    SOUND, // 0x52
+    STOP_SOUND, // 0x53
+    TAB_LIST, // 0x54
+    NBT_QUERY, // 0x55
+    COLLECT_ITEM, // 0x56
+    ENTITY_TELEPORT, // 0x57
+    ADVANCEMENTS, // 0x58
+    ENTITY_PROPERTIES, // 0x59
+    ENTITY_EFFECT, // 0x5A
+    DECLARE_RECIPES, // 0x5B
+    TAGS, // 0x5C
+}

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_15to1_14_4/Protocol1_15To1_14_4.java

@@ -10,7 +10,8 @@ import us.myles.ViaVersion.api.rewriters.SoundRewriter;
 import us.myles.ViaVersion.api.rewriters.TagRewriter;
 import us.myles.ViaVersion.api.rewriters.TagType;
 import us.myles.ViaVersion.api.type.Type;
-import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.ClientboundPackets1_14;
+import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.ServerboundPackets1_14;
 import us.myles.ViaVersion.protocols.protocol1_15to1_14_4.data.MappingData;
 import us.myles.ViaVersion.protocols.protocol1_15to1_14_4.metadata.MetadataRewriter1_15To1_14_4;
 import us.myles.ViaVersion.protocols.protocol1_15to1_14_4.packets.EntityPackets;
@@ -25,7 +26,7 @@ public class Protocol1_15To1_14_4 extends Protocol {
     private TagRewriter tagRewriter;
 
     public Protocol1_15To1_14_4() {
-        super(true);
+        super(ClientboundPackets1_14.class, ClientboundPackets1_15.class, ServerboundPackets1_14.class, ServerboundPackets1_14.class, true);
     }
 
     @Override
@@ -38,24 +39,17 @@ public class Protocol1_15To1_14_4 extends Protocol {
         InventoryPackets.register(this);
 
         SoundRewriter soundRewriter = new SoundRewriter(this, id -> MappingData.soundMappings.getNewId(id));
-        soundRewriter.registerSound(0x50, 0x51); // Entity Sound Effect (added somewhere in 1.14)
+        soundRewriter.registerSound(ClientboundPackets1_14.ENTITY_SOUND); // Entity Sound Effect (added somewhere in 1.14)
-        soundRewriter.registerSound(0x51, 0x52);
+        soundRewriter.registerSound(ClientboundPackets1_14.SOUND);
 
-        // Edit Book
+        registerIncoming(ServerboundPackets1_14.EDIT_BOOK, new PacketRemapper() {
-        registerIncoming(State.PLAY, 0x0C, 0x0C, new PacketRemapper() {
             @Override
             public void registerMap() {
-                handler(new PacketHandler() {
+                handler(wrapper -> InventoryPackets.toServer(wrapper.passthrough(Type.FLAT_VAR_INT_ITEM)));
-                    @Override
-                    public void handle(PacketWrapper wrapper) throws Exception {
-                        InventoryPackets.toServer(wrapper.passthrough(Type.FLAT_VAR_INT_ITEM));
-                    }
-                });
             }
         });
 
-        // Advancements
+        registerOutgoing(ClientboundPackets1_14.ADVANCEMENTS, new PacketRemapper() {
-        registerOutgoing(State.PLAY, 0x57, 0x58, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(new PacketHandler() {
@@ -96,87 +90,8 @@ public class Protocol1_15To1_14_4 extends Protocol {
             }
         });
 
-        // Tags
         tagRewriter = new TagRewriter(this, Protocol1_15To1_14_4::getNewBlockId, InventoryPackets::getNewItemId, EntityPackets::getNewEntityId);
-        tagRewriter.register(0x5B, 0x5C);
+        tagRewriter.register(ClientboundPackets1_14.TAGS);
-
-        registerOutgoing(State.PLAY, 0x08, 0x09);
-        registerOutgoing(State.PLAY, 0x09, 0x0A);
-
-        registerOutgoing(State.PLAY, 0x0C, 0x0D);
-        registerOutgoing(State.PLAY, 0x0D, 0x0E);
-        registerOutgoing(State.PLAY, 0x0E, 0x0F);
-        registerOutgoing(State.PLAY, 0x10, 0x11);
-        registerOutgoing(State.PLAY, 0x11, 0x12);
-        registerOutgoing(State.PLAY, 0x12, 0x13);
-        registerOutgoing(State.PLAY, 0x13, 0x14);
-
-        registerOutgoing(State.PLAY, 0x15, 0x16);
-
-        registerOutgoing(State.PLAY, 0x18, 0x19);
-        registerOutgoing(State.PLAY, 0x19, 0x1A);
-        registerOutgoing(State.PLAY, 0x1A, 0x1B);
-        registerOutgoing(State.PLAY, 0x1B, 0x1C);
-        registerOutgoing(State.PLAY, 0x1C, 0x1D);
-        registerOutgoing(State.PLAY, 0x1D, 0x1E);
-        registerOutgoing(State.PLAY, 0x1E, 0x1F);
-        registerOutgoing(State.PLAY, 0x1F, 0x20);
-        registerOutgoing(State.PLAY, 0x20, 0x21);
-
-
-        registerOutgoing(State.PLAY, 0x24, 0x25);
-
-        registerOutgoing(State.PLAY, 0x26, 0x27);
-
-        registerOutgoing(State.PLAY, 0x28, 0x29);
-        registerOutgoing(State.PLAY, 0x29, 0x2A);
-        registerOutgoing(State.PLAY, 0x2A, 0x2B);
-        registerOutgoing(State.PLAY, 0x2B, 0x2C);
-        registerOutgoing(State.PLAY, 0x2C, 0x2D);
-        registerOutgoing(State.PLAY, 0x2D, 0x2E);
-        registerOutgoing(State.PLAY, 0x2E, 0x2F);
-        registerOutgoing(State.PLAY, 0x2F, 0x30);
-        registerOutgoing(State.PLAY, 0x30, 0x31);
-        registerOutgoing(State.PLAY, 0x31, 0x32);
-        registerOutgoing(State.PLAY, 0x32, 0x33);
-        registerOutgoing(State.PLAY, 0x33, 0x34);
-        registerOutgoing(State.PLAY, 0x34, 0x35);
-        registerOutgoing(State.PLAY, 0x35, 0x36);
-        registerOutgoing(State.PLAY, 0x36, 0x37);
-
-        registerOutgoing(State.PLAY, 0x38, 0x39);
-        registerOutgoing(State.PLAY, 0x39, 0x3A);
-        registerOutgoing(State.PLAY, 0x3B, 0x3C);
-        registerOutgoing(State.PLAY, 0x3C, 0x3D);
-        registerOutgoing(State.PLAY, 0x3D, 0x3E);
-        registerOutgoing(State.PLAY, 0x3E, 0x3F);
-        registerOutgoing(State.PLAY, 0x3F, 0x40);
-        registerOutgoing(State.PLAY, 0x40, 0x41);
-        registerOutgoing(State.PLAY, 0x41, 0x42);
-        registerOutgoing(State.PLAY, 0x42, 0x43);
-
-        registerOutgoing(State.PLAY, 0x44, 0x45);
-        registerOutgoing(State.PLAY, 0x45, 0x46);
-
-        registerOutgoing(State.PLAY, 0x47, 0x48);
-        registerOutgoing(State.PLAY, 0x48, 0x49);
-        registerOutgoing(State.PLAY, 0x49, 0x4A);
-        registerOutgoing(State.PLAY, 0x4A, 0x4B);
-        registerOutgoing(State.PLAY, 0x4B, 0x4C);
-        registerOutgoing(State.PLAY, 0x4C, 0x4D);
-        registerOutgoing(State.PLAY, 0x4D, 0x4E);
-        registerOutgoing(State.PLAY, 0x4E, 0x4F);
-        registerOutgoing(State.PLAY, 0x4F, 0x50);
-
-
-        registerOutgoing(State.PLAY, 0x52, 0x53);
-        registerOutgoing(State.PLAY, 0x53, 0x54);
-        registerOutgoing(State.PLAY, 0x54, 0x55);
-        registerOutgoing(State.PLAY, 0x55, 0x56);
-        registerOutgoing(State.PLAY, 0x56, 0x57);
-
-        registerOutgoing(State.PLAY, 0x58, 0x59);
-        registerOutgoing(State.PLAY, 0x59, 0x5A);
     }
 
     @Override

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_15to1_14_4/packets/EntityPackets.java

@@ -3,11 +3,10 @@ package us.myles.ViaVersion.protocols.protocol1_15to1_14_4.packets;
 import us.myles.ViaVersion.api.PacketWrapper;
 import us.myles.ViaVersion.api.entities.Entity1_15Types;
 import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
-import us.myles.ViaVersion.api.protocol.Protocol;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.api.type.types.version.Types1_14;
-import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.ClientboundPackets1_14;
 import us.myles.ViaVersion.protocols.protocol1_15to1_14_4.Protocol1_15To1_14_4;
 import us.myles.ViaVersion.protocols.protocol1_15to1_14_4.metadata.MetadataRewriter1_15To1_14_4;
 import us.myles.ViaVersion.protocols.protocol1_15to1_14_4.storage.EntityTracker1_15;
@@ -16,14 +15,12 @@ import java.util.List;
 
 public class EntityPackets {
 
-    public static void register(Protocol protocol) {
+    public static void register(Protocol1_15To1_14_4 protocol) {
         MetadataRewriter1_15To1_14_4 metadataRewriter = protocol.get(MetadataRewriter1_15To1_14_4.class);
 
-        // Spawn entity
+        metadataRewriter.registerSpawnTrackerWithData(ClientboundPackets1_14.SPAWN_ENTITY, Entity1_15Types.EntityType.FALLING_BLOCK, Protocol1_15To1_14_4::getNewBlockStateId);
-        metadataRewriter.registerSpawnTrackerWithData(0x00, 0x00, Entity1_15Types.EntityType.FALLING_BLOCK, Protocol1_15To1_14_4::getNewBlockStateId);
 
-        // Spawn mob packet
+        protocol.registerOutgoing(ClientboundPackets1_14.SPAWN_MOB, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x03, 0x03, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity ID
@@ -52,8 +49,7 @@ public class EntityPackets {
             }
         });
 
-        // Spawn player packet
+        protocol.registerOutgoing(ClientboundPackets1_14.SPAWN_PLAYER, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x05, 0x05, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT); // 0 - Entity ID
@@ -79,10 +75,8 @@ public class EntityPackets {
             }
         });
 
-        // Metadata packet
+        metadataRewriter.registerMetadataRewriter(ClientboundPackets1_14.ENTITY_METADATA, Types1_14.METADATA_LIST);
-        metadataRewriter.registerMetadataRewriter(0x43, 0x44, Types1_14.METADATA_LIST);
+        metadataRewriter.registerEntityDestroy(ClientboundPackets1_14.DESTROY_ENTITIES);
-
-        metadataRewriter.registerEntityDestroy(0x37, 0x38);
     }
 
     public static int getNewEntityId(int oldId) {

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_15to1_14_4/packets/InventoryPackets.java

@@ -8,7 +8,8 @@ import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.rewriters.ItemRewriter;
 import us.myles.ViaVersion.api.type.Type;
-import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.ClientboundPackets1_14;
+import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.ServerboundPackets1_14;
 import us.myles.ViaVersion.protocols.protocol1_15to1_14_4.data.MappingData;
 
 public class InventoryPackets {
@@ -16,14 +17,10 @@ public class InventoryPackets {
     public static void register(Protocol protocol) {
         ItemRewriter itemRewriter = new ItemRewriter(protocol, InventoryPackets::toClient, InventoryPackets::toServer);
 
-        // Set cooldown
+        itemRewriter.registerSetCooldown(ClientboundPackets1_14.COOLDOWN, InventoryPackets::getNewItemId);
-        itemRewriter.registerSetCooldown(0x17, 0x18, InventoryPackets::getNewItemId);
+        itemRewriter.registerWindowItems(Type.FLAT_VAR_INT_ITEM_ARRAY, ClientboundPackets1_14.WINDOW_ITEMS);
 
-        // Window items packet
+        protocol.registerOutgoing(ClientboundPackets1_14.TRADE_LIST, new PacketRemapper() {
-        itemRewriter.registerWindowItems(Type.FLAT_VAR_INT_ITEM_ARRAY, 0x14, 0x15);
-
-        // Trade list packet
-        protocol.registerOutgoing(State.PLAY, 0x27, 0x28, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(new PacketHandler() {
@@ -62,14 +59,10 @@ public class InventoryPackets {
             }
         });
 
-        // Set slot packet
+        itemRewriter.registerSetSlot(Type.FLAT_VAR_INT_ITEM, ClientboundPackets1_14.SET_SLOT);
-        itemRewriter.registerSetSlot(Type.FLAT_VAR_INT_ITEM, 0x16, 0x17);
+        itemRewriter.registerEntityEquipment(Type.FLAT_VAR_INT_ITEM, ClientboundPackets1_14.ENTITY_EQUIPMENT);
 
-        // Entity Equipment Packet
+        protocol.registerOutgoing(ClientboundPackets1_14.DECLARE_RECIPES, new PacketRemapper() {
-        itemRewriter.registerEntityEquipment(Type.FLAT_VAR_INT_ITEM, 0x46, 0x47);
-
-        // Declare Recipes
-        protocol.registerOutgoing(State.PLAY, 0x5A, 0x5B, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(new PacketHandler() {
@@ -135,11 +128,8 @@ public class InventoryPackets {
             }
         });
 
-        // Click window packet
+        itemRewriter.registerClickWindow(Type.FLAT_VAR_INT_ITEM, ServerboundPackets1_14.CLICK_WINDOW);
-        itemRewriter.registerClickWindow(Type.FLAT_VAR_INT_ITEM, 0x09, 0x09);
+        itemRewriter.registerCreativeInvAction(Type.FLAT_VAR_INT_ITEM, ServerboundPackets1_14.CREATIVE_INVENTORY_ACTION);
-
-        // Creative Inventory Action
-        itemRewriter.registerCreativeInvAction(Type.FLAT_VAR_INT_ITEM, 0x26, 0x26);
     }
 
     public static void toClient(Item item) {

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_15to1_14_4/packets/PlayerPackets.java

@@ -5,15 +5,14 @@ import us.myles.ViaVersion.api.entities.Entity1_15Types;
 import us.myles.ViaVersion.api.protocol.Protocol;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.type.Type;
-import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.ClientboundPackets1_14;
 import us.myles.ViaVersion.protocols.protocol1_15to1_14_4.storage.EntityTracker1_15;
 import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
 
 public class PlayerPackets {
 
     public static void register(Protocol protocol) {
-        // Respawn
+        protocol.registerOutgoing(ClientboundPackets1_14.RESPAWN, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x3A, 0x3B, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.INT);
@@ -28,8 +27,7 @@ public class PlayerPackets {
             }
         });
 
-        // Join Game
+        protocol.registerOutgoing(ClientboundPackets1_14.JOIN_GAME, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x25, 0x26, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.INT); // 0 - Entity ID

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_15to1_14_4/packets/WorldPackets.java

@@ -8,7 +8,7 @@ import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.rewriters.BlockRewriter;
 import us.myles.ViaVersion.api.type.Type;
-import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.ClientboundPackets1_14;
 import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.types.Chunk1_14Type;
 import us.myles.ViaVersion.protocols.protocol1_15to1_14_4.Protocol1_15To1_14_4;
 import us.myles.ViaVersion.protocols.protocol1_15to1_14_4.types.Chunk1_15Type;
@@ -19,20 +19,12 @@ public class WorldPackets {
     public static void register(Protocol protocol) {
         BlockRewriter blockRewriter = new BlockRewriter(protocol, Type.POSITION1_14, Protocol1_15To1_14_4::getNewBlockStateId, Protocol1_15To1_14_4::getNewBlockId);
 
-        // Block action
+        blockRewriter.registerBlockAction(ClientboundPackets1_14.BLOCK_ACTION);
-        blockRewriter.registerBlockAction(0x0A, 0x0B);
+        blockRewriter.registerBlockChange(ClientboundPackets1_14.BLOCK_CHANGE);
+        blockRewriter.registerMultiBlockChange(ClientboundPackets1_14.MULTI_BLOCK_CHANGE);
+        blockRewriter.registerAcknowledgePlayerDigging(ClientboundPackets1_14.ACKNOWLEDGE_PLAYER_DIGGING);
 
-        // Block Change
+        protocol.registerOutgoing(ClientboundPackets1_14.CHUNK_DATA, new PacketRemapper() {
-        blockRewriter.registerBlockChange(0x0B, 0x0C);
-
-        // Multi Block Change
-        blockRewriter.registerMultiBlockChange(0x0F, 0x10);
-
-        // Acknowledge player digging
-        blockRewriter.registerAcknowledgePlayerDigging(0x5C, 0x08);
-
-        // Chunk Data
-        protocol.registerOutgoing(State.PLAY, 0x21, 0x22, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(new PacketHandler() {
@@ -78,11 +70,8 @@ public class WorldPackets {
             }
         });
 
-        // Effect
+        blockRewriter.registerEffect(ClientboundPackets1_14.EFFECT, 1010, 2001, InventoryPackets::getNewItemId);
-        blockRewriter.registerEffect(0x22, 0x23, 1010, 2001, InventoryPackets::getNewItemId);
+        protocol.registerOutgoing(ClientboundPackets1_14.SPAWN_PARTICLE, new PacketRemapper() {
-
-        // Spawn Particle
-        protocol.registerOutgoing(State.PLAY, 0x23, 0x24, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.INT); // 0 - Particle ID

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16to1_15_2/ClientboundPackets1_16.java

@@ -0,0 +1,99 @@
+package us.myles.ViaVersion.protocols.protocol1_16to1_15_2;
+
+import us.myles.ViaVersion.api.protocol.ClientboundPacketType;
+
+public enum ClientboundPackets1_16 implements ClientboundPacketType {
+
+    SPAWN_ENTITY, // 0x00
+    SPAWN_EXPERIENCE_ORB, // 0x01
+    SPAWN_MOB, // 0x02
+    SPAWN_PAINTING, // 0x03
+    SPAWN_PLAYER, // 0x04
+    ENTITY_ANIMATION, // 0x05
+    STATISTICS, // 0x06
+    ACKNOWLEDGE_PLAYER_DIGGING, // 0x07
+    BLOCK_BREAK_ANIMATION, // 0x08
+    BLOCK_ENTITY_DATA, // 0x09
+    BLOCK_ACTION, // 0x0A
+    BLOCK_CHANGE, // 0x0B
+    BOSSBAR, // 0x0C
+    SERVER_DIFFICULTY, // 0x0D
+    CHAT_MESSAGE, // 0x0E
+    MULTI_BLOCK_CHANGE, // 0x0F
+    TAB_COMPLETE, // 0x10
+    DECLARE_COMMANDS, // 0x11
+    WINDOW_CONFIRMATION, // 0x12
+    CLOSE_WINDOW, // 0x13
+    WINDOW_ITEMS, // 0x14
+    WINDOW_PROPERTY, // 0x15
+    SET_SLOT, // 0x16
+    COOLDOWN, // 0x17
+    PLUGIN_MESSAGE, // 0x18
+    NAMED_SOUND, // 0x19
+    DISCONNECT, // 0x1A
+    ENTITY_STATUS, // 0x1B
+    EXPLOSION, // 0x1C
+    UNLOAD_CHUNK, // 0x1D
+    GAME_EVENT, // 0x1E
+    OPEN_HORSE_WINDOW, // 0x1F
+    KEEP_ALIVE, // 0x20
+    CHUNK_DATA, // 0x21
+    EFFECT, // 0x22
+    SPAWN_PARTICLE, // 0x23
+    UPDATE_LIGHT, // 0x24
+    JOIN_GAME, // 0x25
+    MAP_DATA, // 0x26
+    TRADE_LIST, // 0x27
+    ENTITY_POSITION, // 0x28
+    ENTITY_POSITION_AND_ROTATION, // 0x29
+    ENTITY_ROTATION, // 0x2A
+    ENTITY_MOVEMENT, // 0x2B
+    VEHICLE_MOVE, // 0x2C
+    OPEN_BOOK, // 0x2D
+    OPEN_WINDOW, // 0x2E
+    OPEN_SIGN_EDITOR, // 0x2F
+    CRAFT_RECIPE_RESPONSE, // 0x30
+    PLAYER_ABILITIES, // 0x31
+    COMBAT_EVENT, // 0x32
+    PLAYER_INFO, // 0x33
+    FACE_PLAYER, // 0x34
+    PLAYER_POSITION, // 0x35
+    UNLOCK_RECIPES, // 0x36
+    DESTROY_ENTITIES, // 0x37
+    REMOVE_ENTITY_EFFECT, // 0x38
+    RESOURCE_PACK, // 0x39
+    RESPAWN, // 0x3A
+    ENTITY_HEAD_LOOK, // 0x3B
+    SELECT_ADVANCEMENTS_TAB, // 0x3C
+    WORLD_BORDER, // 0x3D
+    CAMERA, // 0x3E
+    HELD_ITEM_CHANGE, // 0x3F
+    UPDATE_VIEW_POSITION, // 0x40
+    UPDATE_VIEW_DISTANCE, // 0x41
+    SPAWN_POSITION, // 0x42
+    DISPLAY_SCOREBOARD, // 0x43
+    ENTITY_METADATA, // 0x44
+    ATTACH_ENTITY, // 0x45
+    ENTITY_VELOCITY, // 0x46
+    ENTITY_EQUIPMENT, // 0x47
+    SET_EXPERIENCE, // 0x48
+    UPDATE_HEALTH, // 0x49
+    SCOREBOARD_OBJECTIVE, // 0x4A
+    SET_PASSENGERS, // 0x4B
+    TEAMS, // 0x4C
+    UPDATE_SCORE, // 0x4D
+    TIME_UPDATE, // 0x4E
+    TITLE, // 0x4F
+    ENTITY_SOUND, // 0x50
+    SOUND, // 0x51
+    STOP_SOUND, // 0x52
+    TAB_LIST, // 0x53
+    NBT_QUERY, // 0x54
+    COLLECT_ITEM, // 0x55
+    ENTITY_TELEPORT, // 0x56
+    ADVANCEMENTS, // 0x57
+    ENTITY_PROPERTIES, // 0x58
+    ENTITY_EFFECT, // 0x59
+    DECLARE_RECIPES, // 0x5A
+    TAGS, // 0x5B
+}

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16to1_15_2/Protocol1_16To1_15_2.java

@@ -9,6 +9,8 @@ import us.myles.ViaVersion.api.rewriters.TagRewriter;
 import us.myles.ViaVersion.api.rewriters.TagType;
 import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.ServerboundPackets1_14;
+import us.myles.ViaVersion.protocols.protocol1_15to1_14_4.ClientboundPackets1_15;
 import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.data.MappingData;
 import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.metadata.MetadataRewriter1_16To1_15_2;
 import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.packets.EntityPackets;
@@ -25,7 +27,7 @@ public class Protocol1_16To1_15_2 extends Protocol {
     private TagRewriter tagRewriter;
 
     public Protocol1_16To1_15_2() {
-        super(true);
+        super(ClientboundPackets1_15.class, ClientboundPackets1_16.class, ServerboundPackets1_14.class, ServerboundPackets1_16.class, true);
     }
 
     @Override
@@ -37,7 +39,7 @@ public class Protocol1_16To1_15_2 extends Protocol {
         InventoryPackets.register(this);
 
         tagRewriter = new TagRewriter(this, Protocol1_16To1_15_2::getNewBlockId, InventoryPackets::getNewItemId, metadataRewriter::getNewEntityId);
-        tagRewriter.register(0x5C, 0x5B);
+        tagRewriter.register(ClientboundPackets1_15.TAGS);
 
         // Login Success
         registerOutgoing(State.LOGIN, 0x02, 0x02, new PacketRemapper() {
@@ -51,8 +53,7 @@ public class Protocol1_16To1_15_2 extends Protocol {
             }
         });
 
-        // Chat Message
+        registerOutgoing(ClientboundPackets1_15.CHAT_MESSAGE, new PacketRemapper() {
-        registerOutgoing(State.PLAY, 0x0F, 0x0E, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.STRING);
@@ -62,11 +63,10 @@ public class Protocol1_16To1_15_2 extends Protocol {
         });
 
         SoundRewriter soundRewriter = new SoundRewriter(this, id -> MappingData.soundMappings.getNewId(id));
-        soundRewriter.registerSound(0x51, 0x50);
+        soundRewriter.registerSound(ClientboundPackets1_15.SOUND);
-        soundRewriter.registerSound(0x52, 0x51);
+        soundRewriter.registerSound(ClientboundPackets1_15.ENTITY_SOUND);
 
-        // Advancements
+        registerOutgoing(ClientboundPackets1_15.ADVANCEMENTS, new PacketRemapper() {
-        registerOutgoing(State.PLAY, 0x58, 0x57, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(wrapper -> {
@@ -104,91 +104,8 @@ public class Protocol1_16To1_15_2 extends Protocol {
             }
         });
 
-        registerOutgoing(State.PLAY, 0x04, 0x03);
+        cancelIncoming(ServerboundPackets1_16.GENERATE_JIGSAW);
-        registerOutgoing(State.PLAY, 0x06, 0x05);
+        cancelIncoming(ServerboundPackets1_16.UPDATE_JIGSAW_BLOCK);
-        registerOutgoing(State.PLAY, 0x07, 0x06);
-        registerOutgoing(State.PLAY, 0x09, 0x08);
-        registerOutgoing(State.PLAY, 0x0A, 0x09);
-        registerOutgoing(State.PLAY, 0x0D, 0x0C);
-        registerOutgoing(State.PLAY, 0x0E, 0x0D);
-        registerOutgoing(State.PLAY, 0x11, 0x10);
-        registerOutgoing(State.PLAY, 0x12, 0x11);
-        registerOutgoing(State.PLAY, 0x13, 0x12);
-        registerOutgoing(State.PLAY, 0x14, 0x13);
-        registerOutgoing(State.PLAY, 0x19, 0x18);
-        registerOutgoing(State.PLAY, 0x1A, 0x19);
-        registerOutgoing(State.PLAY, 0x1B, 0x1A);
-        registerOutgoing(State.PLAY, 0x1C, 0x1B);
-        registerOutgoing(State.PLAY, 0x1D, 0x1C);
-        registerOutgoing(State.PLAY, 0x1E, 0x1D);
-        registerOutgoing(State.PLAY, 0x1F, 0x1E);
-        registerOutgoing(State.PLAY, 0x20, 0x1F);
-        registerOutgoing(State.PLAY, 0x21, 0x20);
-        registerOutgoing(State.PLAY, 0x25, 0x24);
-        registerOutgoing(State.PLAY, 0x27, 0x26);
-        registerOutgoing(State.PLAY, 0x29, 0x28);
-        registerOutgoing(State.PLAY, 0x2A, 0x29);
-        registerOutgoing(State.PLAY, 0x2B, 0x2A);
-        registerOutgoing(State.PLAY, 0x2C, 0x2B);
-        registerOutgoing(State.PLAY, 0x2D, 0x2C);
-        registerOutgoing(State.PLAY, 0x2E, 0x2D);
-        registerOutgoing(State.PLAY, 0x30, 0x2F);
-        registerOutgoing(State.PLAY, 0x31, 0x30);
-        registerOutgoing(State.PLAY, 0x32, 0x31);
-        registerOutgoing(State.PLAY, 0x33, 0x32);
-        registerOutgoing(State.PLAY, 0x34, 0x33);
-        registerOutgoing(State.PLAY, 0x35, 0x34);
-        registerOutgoing(State.PLAY, 0x36, 0x35);
-        registerOutgoing(State.PLAY, 0x37, 0x36);
-        registerOutgoing(State.PLAY, 0x39, 0x38);
-        registerOutgoing(State.PLAY, 0x3A, 0x39);
-        registerOutgoing(State.PLAY, 0x3C, 0x3B);
-        registerOutgoing(State.PLAY, 0x3D, 0x3C);
-        registerOutgoing(State.PLAY, 0x3E, 0x3D);
-        registerOutgoing(State.PLAY, 0x3F, 0x3E);
-        registerOutgoing(State.PLAY, 0x40, 0x3F);
-        registerOutgoing(State.PLAY, 0x41, 0x40);
-        registerOutgoing(State.PLAY, 0x42, 0x41);
-        registerOutgoing(State.PLAY, 0x4E, 0x42);
-        registerOutgoing(State.PLAY, 0x4F, 0x4E);
-        registerOutgoing(State.PLAY, 0x50, 0x4F);
-        registerOutgoing(State.PLAY, 0x53, 0x52);
-        registerOutgoing(State.PLAY, 0x54, 0x53);
-        registerOutgoing(State.PLAY, 0x55, 0x54);
-        registerOutgoing(State.PLAY, 0x56, 0x55);
-        registerOutgoing(State.PLAY, 0x57, 0x56);
-        registerOutgoing(State.PLAY, 0x5A, 0x59);
-
-        cancelIncoming(State.PLAY, 0x0F); // Generate jisaw
-        cancelIncoming(State.PLAY, 0x28); // Jigsaw update
-        registerIncoming(State.PLAY, 0x0F, 0x10);
-        registerIncoming(State.PLAY, 0x10, 0x11);
-        registerIncoming(State.PLAY, 0x11, 0x12);
-        registerIncoming(State.PLAY, 0x12, 0x13);
-        registerIncoming(State.PLAY, 0x13, 0x14);
-        registerIncoming(State.PLAY, 0x14, 0x15);
-        registerIncoming(State.PLAY, 0x15, 0x16);
-        registerIncoming(State.PLAY, 0x16, 0x17);
-        registerIncoming(State.PLAY, 0x17, 0x18);
-        registerIncoming(State.PLAY, 0x18, 0x19);
-        registerIncoming(State.PLAY, 0x19, 0x1A);
-        registerIncoming(State.PLAY, 0x1A, 0x1B);
-        registerIncoming(State.PLAY, 0x1B, 0x1C);
-        registerIncoming(State.PLAY, 0x1C, 0x1D);
-        registerIncoming(State.PLAY, 0x1D, 0x1E);
-        registerIncoming(State.PLAY, 0x1E, 0x1F);
-        registerIncoming(State.PLAY, 0x1F, 0x20);
-        registerIncoming(State.PLAY, 0x20, 0x21);
-        registerIncoming(State.PLAY, 0x21, 0x22);
-        registerIncoming(State.PLAY, 0x22, 0x23);
-        registerIncoming(State.PLAY, 0x23, 0x24);
-        registerIncoming(State.PLAY, 0x24, 0x25);
-        registerIncoming(State.PLAY, 0x28, 0x29);
-        registerIncoming(State.PLAY, 0x29, 0x2A);
-        registerIncoming(State.PLAY, 0x2A, 0x2B);
-        registerIncoming(State.PLAY, 0x2B, 0x2C);
-        registerIncoming(State.PLAY, 0x2C, 0x2D);
-        registerIncoming(State.PLAY, 0x2D, 0x2E);
     }
 
     @Override

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16to1_15_2/ServerboundPackets1_16.java

@@ -0,0 +1,54 @@
+package us.myles.ViaVersion.protocols.protocol1_16to1_15_2;
+
+import us.myles.ViaVersion.api.protocol.ServerboundPacketType;
+
+public enum ServerboundPackets1_16 implements ServerboundPacketType {
+
+    TELEPORT_CONFIRM, // 0x00
+    QUERY_BLOCK_NBT, // 0x01
+    SET_DIFFICULTY, // 0x02
+    CHAT_MESSAGE, // 0x03
+    CLIENT_STATUS, // 0x04
+    CLIENT_SETTINGS, // 0x05
+    TAB_COMPLETE, // 0x06
+    WINDOW_CONFIRMATION, // 0x07
+    CLICK_WINDOW_BUTTON, // 0x08
+    CLICK_WINDOW, // 0x09
+    CLOSE_WINDOW, // 0x0A
+    PLUGIN_MESSAGE, // 0x0B
+    EDIT_BOOK, // 0x0C
+    ENTITY_NBT_REQUEST, // 0x0D
+    INTERACT_ENTITY, // 0x0E
+    GENERATE_JIGSAW, // 0x0F
+    KEEP_ALIVE, // 0x10
+    LOCK_DIFFICULTY, // 0x11
+    PLAYER_POSITION, // 0x12
+    PLAYER_POSITION_AND_ROTATION, // 0x13
+    PLAYER_ROTATION, // 0x14
+    PLAYER_MOVEMENT, // 0x15
+    VEHICLE_MOVE, // 0x16
+    STEER_BOAT, // 0x17
+    PICK_ITEM, // 0x18
+    CRAFT_RECIPE_REQUEST, // 0x19
+    PLAYER_ABILITIES, // 0x1A
+    PLAYER_DIGGING, // 0x1B
+    ENTITY_ACTION, // 0x1C
+    STEER_VEHICLE, // 0x1D
+    RECIPE_BOOK_DATA, // 0x1E
+    RENAME_ITEM, // 0x1F
+    RESOURCE_PACK_STATUS, // 0x20
+    ADVANCEMENT_TAB, // 0x21
+    SELECT_TRADE, // 0x22
+    SET_BEACON_EFFECT, // 0x23
+    HELD_ITEM_CHANGE, // 0x24
+    UPDATE_COMMAND_BLOCK, // 0x25
+    UPDATE_COMMAND_BLOCK_MINECART, // 0x26
+    CREATIVE_INVENTORY_ACTION, // 0x27
+    UPDATE_JIGSAW_BLOCK, // 0x28
+    UPDATE_STRUCTURE_BLOCK, // 0x29
+    UPDATE_SIGN, // 0x2A
+    ANIMATION, // 0x2B
+    SPECTATE, // 0x2C
+    PLAYER_BLOCK_PLACEMENT, // 0x2D
+    USE_ITEM, // 0x2E
+}

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16to1_15_2/packets/EntityPackets.java

@@ -9,13 +9,13 @@ import com.github.steveice10.opennbt.tag.builtin.StringTag;
 import us.myles.ViaVersion.api.PacketWrapper;
 import us.myles.ViaVersion.api.Via;
 import us.myles.ViaVersion.api.entities.Entity1_16Types;
-import us.myles.ViaVersion.api.protocol.Protocol;
 import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.remapper.ValueTransformer;
 import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.api.type.types.version.Types1_14;
-import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_15to1_14_4.ClientboundPackets1_15;
+import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.ClientboundPackets1_16;
 import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.Protocol1_16To1_15_2;
 import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.data.MappingData;
 import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.metadata.MetadataRewriter1_16To1_15_2;
@@ -102,11 +102,11 @@ public class EntityPackets {
         return tag;
     }
 
-    public static void register(Protocol protocol) {
+    public static void register(Protocol1_16To1_15_2 protocol) {
         MetadataRewriter1_16To1_15_2 metadataRewriter = protocol.get(MetadataRewriter1_16To1_15_2.class);
 
         // Spawn lightning -> Spawn entity
-        protocol.registerOutgoing(State.PLAY, 0x02, 0x00, new PacketRemapper() {
+        protocol.registerOutgoing(ClientboundPackets1_15.SPAWN_GLOBAL_ENTITY, ClientboundPackets1_16.SPAWN_ENTITY, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(wrapper -> {
@@ -131,23 +131,13 @@ public class EntityPackets {
             }
         });
 
-        // Spawn entity
+        metadataRewriter.registerSpawnTrackerWithData(ClientboundPackets1_15.SPAWN_ENTITY, Entity1_16Types.EntityType.FALLING_BLOCK, Protocol1_16To1_15_2::getNewBlockStateId);
-        metadataRewriter.registerSpawnTrackerWithData(0x00, 0x00, Entity1_16Types.EntityType.FALLING_BLOCK, Protocol1_16To1_15_2::getNewBlockStateId);
+        metadataRewriter.registerTracker(ClientboundPackets1_15.SPAWN_MOB);
+        metadataRewriter.registerTracker(ClientboundPackets1_15.SPAWN_PLAYER, Entity1_16Types.EntityType.PLAYER);
+        metadataRewriter.registerMetadataRewriter(ClientboundPackets1_15.ENTITY_METADATA, Types1_14.METADATA_LIST);
+        metadataRewriter.registerEntityDestroy(ClientboundPackets1_15.DESTROY_ENTITIES);
 
-        // Spawn mob packet
+        protocol.registerOutgoing(ClientboundPackets1_15.RESPAWN, new PacketRemapper() {
-        metadataRewriter.registerTracker(0x03, 0x02);
-
-        // Spawn player packet
-        metadataRewriter.registerTracker(0x05, 0x04, Entity1_16Types.EntityType.PLAYER);
-
-        // Metadata
-        metadataRewriter.registerMetadataRewriter(0x44, 0x44, Types1_14.METADATA_LIST);
-
-        // Entity Destroy
-        metadataRewriter.registerEntityDestroy(0x38, 0x37);
-
-        // Respawn
-        protocol.registerOutgoing(State.PLAY, 0x3B, 0x3A, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(DIMENSION_HANDLER);
@@ -166,8 +156,7 @@ public class EntityPackets {
             }
         });
 
-        // Join Game
+        protocol.registerOutgoing(ClientboundPackets1_15.JOIN_GAME, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x26, 0x25, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.INT); // Entity ID
@@ -205,8 +194,7 @@ public class EntityPackets {
             }
         });
 
-        // Entity Properties
+        protocol.registerOutgoing(ClientboundPackets1_15.ENTITY_PROPERTIES, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x59, 0x58, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(wrapper -> {

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16to1_15_2/packets/InventoryPackets.java

@@ -11,7 +11,8 @@ import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.rewriters.ItemRewriter;
 import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.api.type.types.UUIDIntArrayType;
-import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_15to1_14_4.ClientboundPackets1_15;
+import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.ServerboundPackets1_16;
 import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.data.MappingData;
 
 import java.util.UUID;
@@ -21,8 +22,7 @@ public class InventoryPackets {
     public static void register(Protocol protocol) {
         ItemRewriter itemRewriter = new ItemRewriter(protocol, InventoryPackets::toClient, InventoryPackets::toServer);
 
-        // Open Window
+        protocol.registerOutgoing(ClientboundPackets1_15.OPEN_WINDOW, new PacketRemapper() {
-        protocol.registerOutgoing(State.PLAY, 0x2F, 0x2E, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.VAR_INT);
@@ -37,9 +37,7 @@ public class InventoryPackets {
                 });
             }
         });
-
+        protocol.registerOutgoing(ClientboundPackets1_15.WINDOW_PROPERTY, new PacketRemapper() {
-        // Window Property
-        protocol.registerOutgoing(State.PLAY, 0x16, 0x15, new PacketRemapper() {
             @Override
             public void registerMap() {
                 map(Type.UNSIGNED_BYTE); // Window id
@@ -58,14 +56,10 @@ public class InventoryPackets {
             }
         });
 
-        // Set cooldown
+        itemRewriter.registerSetCooldown(ClientboundPackets1_15.COOLDOWN, InventoryPackets::getNewItemId);
-        itemRewriter.registerSetCooldown(0x18, 0x17, InventoryPackets::getNewItemId);
+        itemRewriter.registerWindowItems(Type.FLAT_VAR_INT_ITEM_ARRAY, ClientboundPackets1_15.WINDOW_ITEMS);
 
-        // Window items packet
+        protocol.registerOutgoing(ClientboundPackets1_15.TRADE_LIST, new PacketRemapper() {
-        itemRewriter.registerWindowItems(Type.FLAT_VAR_INT_ITEM_ARRAY, 0x15, 0x14);
-
-        // Trade list packet
-        protocol.registerOutgoing(State.PLAY, 0x28, 0x27, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(wrapper -> {
@@ -100,14 +94,10 @@ public class InventoryPackets {
             }
         });
 
-        // Set slot packet
+        itemRewriter.registerSetSlot(Type.FLAT_VAR_INT_ITEM, ClientboundPackets1_15.SET_SLOT);
-        itemRewriter.registerSetSlot(Type.FLAT_VAR_INT_ITEM, 0x17, 0x16);
+        itemRewriter.registerEntityEquipment(Type.FLAT_VAR_INT_ITEM, ClientboundPackets1_15.ENTITY_EQUIPMENT);
 
-        // Entity Equipment Packet
+        protocol.registerOutgoing(ClientboundPackets1_15.DECLARE_RECIPES, new PacketRemapper() {
-        itemRewriter.registerEntityEquipment(Type.FLAT_VAR_INT_ITEM, 0x47, 0x47);
-
-        // Declare Recipes
-        protocol.registerOutgoing(State.PLAY, 0x5B, 0x5A, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(wrapper -> {
@@ -166,14 +156,10 @@ public class InventoryPackets {
             }
         });
 
-        // Click window packet
+        itemRewriter.registerClickWindow(Type.FLAT_VAR_INT_ITEM, ServerboundPackets1_16.CLICK_WINDOW);
-        itemRewriter.registerClickWindow(Type.FLAT_VAR_INT_ITEM, 0x09, 0x09);
+        itemRewriter.registerCreativeInvAction(Type.FLAT_VAR_INT_ITEM, ServerboundPackets1_16.CREATIVE_INVENTORY_ACTION);
 
-        // Creative Inventory Action
+        protocol.registerIncoming(ServerboundPackets1_16.EDIT_BOOK, new PacketRemapper() {
-        itemRewriter.registerCreativeInvAction(Type.FLAT_VAR_INT_ITEM, 0x26, 0x27);
-
-        // Edit Book
-        protocol.registerIncoming(State.PLAY, 0x0C, 0x0C, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(wrapper -> InventoryPackets.toServer(wrapper.passthrough(Type.FLAT_VAR_INT_ITEM)));

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_16to1_15_2/packets/WorldPackets.java

@@ -12,7 +12,7 @@ import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.rewriters.BlockRewriter;
 import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.api.type.types.UUIDIntArrayType;
-import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_15to1_14_4.ClientboundPackets1_15;
 import us.myles.ViaVersion.protocols.protocol1_15to1_14_4.types.Chunk1_15Type;
 import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.Protocol1_16To1_15_2;
 import us.myles.ViaVersion.protocols.protocol1_16to1_15_2.types.Chunk1_16Type;
@@ -26,20 +26,12 @@ public class WorldPackets {
     public static void register(Protocol protocol) {
         BlockRewriter blockRewriter = new BlockRewriter(protocol, Type.POSITION1_14, Protocol1_16To1_15_2::getNewBlockStateId, Protocol1_16To1_15_2::getNewBlockId);
 
-        // Block action
+        blockRewriter.registerBlockAction(ClientboundPackets1_15.BLOCK_ACTION);
-        blockRewriter.registerBlockAction(0x0B, 0x0A);
+        blockRewriter.registerBlockChange(ClientboundPackets1_15.BLOCK_CHANGE);
+        blockRewriter.registerMultiBlockChange(ClientboundPackets1_15.MULTI_BLOCK_CHANGE);
+        blockRewriter.registerAcknowledgePlayerDigging(ClientboundPackets1_15.ACKNOWLEDGE_PLAYER_DIGGING);
 
-        // Block Change
+        protocol.registerOutgoing(ClientboundPackets1_15.CHUNK_DATA, new PacketRemapper() {
-        blockRewriter.registerBlockChange(0x0C, 0x0B);
-
-        // Multi Block Change
-        blockRewriter.registerMultiBlockChange(0x10, 0x0F);
-
-        // Acknowledge player digging
-        blockRewriter.registerAcknowledgePlayerDigging(0x08, 0x07);
-
-        // Chunk Data
-        protocol.registerOutgoing(State.PLAY, 0x22, 0x21, new PacketRemapper() {
             @Override
             public void registerMap() {
                 handler(wrapper -> {
@@ -96,11 +88,8 @@ public class WorldPackets {
             }
         });
 
-        // Effect
+        blockRewriter.registerEffect(ClientboundPackets1_15.EFFECT, 1010, 2001, InventoryPackets::getNewItemId);
-        blockRewriter.registerEffect(0x23, 0x22, 1010, 2001, InventoryPackets::getNewItemId);
+        blockRewriter.registerSpawnParticle(Type.DOUBLE, ClientboundPackets1_15.SPAWN_PARTICLE, 3, 23, 32,
-
-        // Spawn Particle
-        blockRewriter.registerSpawnParticle(Type.DOUBLE, 0x24, 0x23, 3, 23, 32,
                 WorldPackets::getNewParticleId, InventoryPackets::toClient, Type.FLAT_VAR_INT_ITEM);
     }
 

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_9_1to1_9/Protocol1_9_1To1_9.java

@@ -8,6 +8,7 @@ import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.packets.State;
 
 public class Protocol1_9_1To1_9 extends Protocol {
+
     @Override
     protected void registerPackets() {
         // Currently supports 1.9.1 and 1.9.2

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_9_3to1_9_1_2/Protocol1_9_3To1_9_1_2.java

@@ -20,6 +20,7 @@ import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.types.Chunk1_9_1_2Ty
 import java.util.List;
 
 public class Protocol1_9_3To1_9_1_2 extends Protocol {
+
     @Override
     protected void registerPackets() {
 

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_9to1_8/packets/EntityPackets.java

@@ -7,7 +7,6 @@ import us.myles.ViaVersion.api.Triple;
 import us.myles.ViaVersion.api.Via;
 import us.myles.ViaVersion.api.minecraft.item.Item;
 import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
-import us.myles.ViaVersion.api.protocol.Protocol;
 import us.myles.ViaVersion.api.remapper.PacketHandler;
 import us.myles.ViaVersion.api.remapper.PacketRemapper;
 import us.myles.ViaVersion.api.remapper.ValueTransformer;
@@ -30,7 +29,7 @@ public class EntityPackets {
         }
     };
 
-    public static void register(final Protocol protocol) {
+    public static void register(Protocol1_9To1_8 protocol) {
         // Attach Entity Packet
         protocol.registerOutgoing(State.PLAY, 0x1B, 0x3A, new PacketRemapper() {
 

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_9to1_8/packets/SpawnPackets.java

@@ -31,7 +31,7 @@ public class SpawnPackets {
         }
     };
 
-    public static void register(final Protocol protocol) {
+    public static void register(Protocol1_9To1_8 protocol) {
         // Spawn Object Packet
         protocol.registerOutgoing(State.PLAY, 0x0E, 0x00, new PacketRemapper() {
             @Override

common/src/main/java/us/myles/ViaVersion/protocols/protocol1_9to1_9_1/Protocol1_9To1_9_1.java

@@ -8,6 +8,7 @@ import us.myles.ViaVersion.api.type.Type;
 import us.myles.ViaVersion.packets.State;
 
 public class Protocol1_9To1_9_1 extends Protocol {
+
     @Override
     protected void registerPackets() {
         // Currently supports 1.9.1 and 1.9.2