24w18a

Abstract item rewriters still need additional handling for once there are actual item changes, but this works as is for now

api/src/main/java/com/viaversion/viaversion/api/protocol/version/ProtocolVersion.java

@@ -84,6 +84,7 @@ public class ProtocolVersion implements Comparable<ProtocolVersion> {
     public static final ProtocolVersion v1_20_2 = register(764, "1.20.2");
     public static final ProtocolVersion v1_20_3 = register(765, "1.20.3-1.20.4", new SubVersionRange("1.20", 3, 4));
     public static final ProtocolVersion v1_20_5 = register(766, "1.20.5-1.20.6", new SubVersionRange("1.20", 5, 6));
+    public static final ProtocolVersion v1_21 = register(767, 193, "1.21");
     public static final ProtocolVersion unknown = new ProtocolVersion(VersionType.SPECIAL, -1, -1, "UNKNOWN", null);
 
     public static ProtocolVersion register(int version, String name) {

api/src/main/java/com/viaversion/viaversion/api/type/types/misc/ParticleType.java

@@ -71,8 +71,6 @@ public class ParticleType extends DynamicType<Particle> {
         };
         public static final DataReader<Particle> ITEM1_13 = itemHandler(Types.ITEM1_13);
         public static final DataReader<Particle> ITEM1_13_2 = itemHandler(Types.ITEM1_13_2);
-        public static final DataReader<Particle> ITEM1_20_2 = itemHandler(Types.ITEM1_20_2);
-        public static final DataReader<Particle> ITEM1_20_5 = itemHandler(Types1_20_5.ITEM);
         public static final DataReader<Particle> DUST = (buf, particle) -> {
             particle.add(Types.FLOAT, Types.FLOAT.readPrimitive(buf)); // Red 0-1
             particle.add(Types.FLOAT, Types.FLOAT.readPrimitive(buf)); // Green 0-1
@@ -139,5 +137,9 @@ public class ParticleType extends DynamicType<Particle> {
             particle.add(Types.VAR_INT, Types.VAR_INT.readPrimitive(buf)); // Delay
         };
         public static final DataReader<Particle> COLOR = (buf, particle) -> particle.add(Types.INT, buf.readInt());
+
+        public static DataReader<Particle> item(Type<Item> item) {
+            return (buf, particle) -> particle.add(item, item.read(buf));
+        }
     }
 }

api/src/main/java/com/viaversion/viaversion/api/type/types/version/Types1_21.java

@@ -0,0 +1,55 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2024 ViaVersion and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.viaversion.viaversion.api.type.types.version;
+
+import com.viaversion.viaversion.api.minecraft.Particle;
+import com.viaversion.viaversion.api.minecraft.data.StructuredData;
+import com.viaversion.viaversion.api.minecraft.item.Item;
+import com.viaversion.viaversion.api.minecraft.metadata.Metadata;
+import com.viaversion.viaversion.api.minecraft.metadata.types.MetaTypes1_20_5;
+import com.viaversion.viaversion.api.type.Type;
+import com.viaversion.viaversion.api.type.types.ArrayType;
+import com.viaversion.viaversion.api.type.types.item.ItemCostType1_20_5;
+import com.viaversion.viaversion.api.type.types.item.ItemType1_20_5;
+import com.viaversion.viaversion.api.type.types.item.StructuredDataType;
+import com.viaversion.viaversion.api.type.types.metadata.MetaListType;
+import com.viaversion.viaversion.api.type.types.metadata.MetadataType;
+import com.viaversion.viaversion.api.type.types.misc.ParticleType;
+import java.util.List;
+
+// Most of these are only safe to use after protocol loading
+public final class Types1_21 {
+
+    public static final StructuredDataType STRUCTURED_DATA = new StructuredDataType();
+    public static final Type<StructuredData<?>[]> STRUCTURED_DATA_ARRAY = new ArrayType<>(STRUCTURED_DATA);
+    public static final Type<Item> ITEM = new ItemType1_20_5(STRUCTURED_DATA);
+    public static final Type<Item[]> ITEM_ARRAY = new ArrayType<>(ITEM);
+    public static final Type<Item> ITEM_COST = new ItemCostType1_20_5(STRUCTURED_DATA_ARRAY);
+    public static final Type<Item> OPTIONAL_ITEM_COST = new ItemCostType1_20_5.OptionalItemCostType(ITEM_COST);
+
+    public static final ParticleType PARTICLE = new ParticleType();
+    public static final ArrayType<Particle> PARTICLES = new ArrayType<>(PARTICLE);
+    public static final MetaTypes1_20_5 META_TYPES = new MetaTypes1_20_5(PARTICLE, PARTICLES);
+    public static final Type<Metadata> METADATA = new MetadataType(META_TYPES);
+    public static final Type<List<Metadata>> METADATA_LIST = new MetaListType(METADATA);
+}

common/src/main/java/com/viaversion/viaversion/protocol/ProtocolManagerImpl.java

@@ -187,6 +187,8 @@ public class ProtocolManagerImpl implements ProtocolManager {
         registerProtocol(new Protocol1_20To1_20_2(), ProtocolVersion.v1_20_2, ProtocolVersion.v1_20);
         registerProtocol(new Protocol1_20_2To1_20_3(), ProtocolVersion.v1_20_3, ProtocolVersion.v1_20_2);
         registerProtocol(new Protocol1_20_3To1_20_5(), ProtocolVersion.v1_20_5, ProtocolVersion.v1_20_3);
+
+        registerProtocol(new Protocol1_21To1_20_5(), ProtocolVersion.v1_21, ProtocolVersion.v1_20_5);
     }
 
     @Override

common/src/main/java/com/viaversion/viaversion/protocols/protocol1_21to1_20_5/Protocol1_21To1_20_5.java

@@ -0,0 +1,145 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2024 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocols.protocol1_21to1_20_5;
+
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.minecraft.data.StructuredDataKey;
+import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_20_5;
+import com.viaversion.viaversion.api.protocol.AbstractProtocol;
+import com.viaversion.viaversion.api.protocol.packet.provider.PacketTypesProvider;
+import com.viaversion.viaversion.api.protocol.packet.provider.SimplePacketTypesProvider;
+import com.viaversion.viaversion.api.type.types.misc.ParticleType;
+import com.viaversion.viaversion.api.type.types.version.Types1_20_5;
+import com.viaversion.viaversion.api.type.types.version.Types1_21;
+import com.viaversion.viaversion.data.entity.EntityTrackerBase;
+import com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.packet.ClientboundConfigurationPackets1_20_5;
+import com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.packet.ClientboundPacket1_20_5;
+import com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.packet.ClientboundPackets1_20_5;
+import com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.packet.ServerboundConfigurationPackets1_20_5;
+import com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.packet.ServerboundPacket1_20_5;
+import com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.packet.ServerboundPackets1_20_5;
+import com.viaversion.viaversion.protocols.protocol1_21to1_20_5.data.MappingData;
+import com.viaversion.viaversion.protocols.protocol1_21to1_20_5.rewriter.BlockItemPacketRewriter1_21;
+import com.viaversion.viaversion.protocols.protocol1_21to1_20_5.rewriter.EntityPacketRewriter1_21;
+import com.viaversion.viaversion.rewriter.AttributeRewriter;
+import com.viaversion.viaversion.rewriter.SoundRewriter;
+import com.viaversion.viaversion.rewriter.StatisticsRewriter;
+import com.viaversion.viaversion.rewriter.TagRewriter;
+
+import static com.viaversion.viaversion.util.ProtocolUtil.packetTypeMap;
+
+public final class Protocol1_21To1_20_5 extends AbstractProtocol<ClientboundPacket1_20_5, ClientboundPacket1_20_5, ServerboundPacket1_20_5, ServerboundPacket1_20_5> {
+
+    public static final MappingData MAPPINGS = new MappingData();
+    private final EntityPacketRewriter1_21 entityRewriter = new EntityPacketRewriter1_21(this);
+    private final BlockItemPacketRewriter1_21 itemRewriter = new BlockItemPacketRewriter1_21(this);
+    private final TagRewriter<ClientboundPacket1_20_5> tagRewriter = new TagRewriter<>(this);
+
+    public Protocol1_21To1_20_5() {
+        super(ClientboundPacket1_20_5.class, ClientboundPacket1_20_5.class, ServerboundPacket1_20_5.class, ServerboundPacket1_20_5.class);
+    }
+
+    @Override
+    protected void registerPackets() {
+        super.registerPackets();
+
+        tagRewriter.registerGeneric(ClientboundPackets1_20_5.TAGS);
+        tagRewriter.registerGeneric(ClientboundConfigurationPackets1_20_5.UPDATE_TAGS);
+
+        final SoundRewriter<ClientboundPacket1_20_5> soundRewriter = new SoundRewriter<>(this);
+        soundRewriter.register1_19_3Sound(ClientboundPackets1_20_5.SOUND);
+        soundRewriter.register1_19_3Sound(ClientboundPackets1_20_5.ENTITY_SOUND);
+
+        new StatisticsRewriter<>(this).register(ClientboundPackets1_20_5.STATISTICS);
+        new AttributeRewriter<>(this).register1_20_5(ClientboundPackets1_20_5.ENTITY_PROPERTIES);
+    }
+
+    @Override
+    protected void onMappingDataLoaded() {
+        super.onMappingDataLoaded();
+
+        // Added preemptively TODO Check if there are actual changes before release
+        Types1_21.PARTICLE.filler(this)
+            .reader("block", ParticleType.Readers.BLOCK)
+            .reader("block_marker", ParticleType.Readers.BLOCK)
+            .reader("dust", ParticleType.Readers.DUST)
+            .reader("dust_pillar", ParticleType.Readers.BLOCK)
+            .reader("falling_dust", ParticleType.Readers.BLOCK)
+            .reader("dust_color_transition", ParticleType.Readers.DUST_TRANSITION)
+            .reader("item", ParticleType.Readers.item(Types1_20_5.ITEM))
+            .reader("vibration", ParticleType.Readers.VIBRATION1_20_3)
+            .reader("sculk_charge", ParticleType.Readers.SCULK_CHARGE)
+            .reader("shriek", ParticleType.Readers.SHRIEK)
+            .reader("entity_effect", ParticleType.Readers.COLOR);
+        Types1_21.STRUCTURED_DATA.filler(this)
+            .add(StructuredDataKey.CUSTOM_DATA).add(StructuredDataKey.MAX_STACK_SIZE).add(StructuredDataKey.MAX_DAMAGE)
+            .add(StructuredDataKey.DAMAGE).add(StructuredDataKey.UNBREAKABLE).add(StructuredDataKey.RARITY)
+            .add(StructuredDataKey.HIDE_TOOLTIP).add(StructuredDataKey.FOOD).add(StructuredDataKey.FIRE_RESISTANT)
+            .add(StructuredDataKey.CUSTOM_NAME).add(StructuredDataKey.LORE).add(StructuredDataKey.ENCHANTMENTS)
+            .add(StructuredDataKey.CAN_PLACE_ON).add(StructuredDataKey.CAN_BREAK).add(StructuredDataKey.ATTRIBUTE_MODIFIERS)
+            .add(StructuredDataKey.CUSTOM_MODEL_DATA).add(StructuredDataKey.HIDE_ADDITIONAL_TOOLTIP).add(StructuredDataKey.REPAIR_COST)
+            .add(StructuredDataKey.CREATIVE_SLOT_LOCK).add(StructuredDataKey.ENCHANTMENT_GLINT_OVERRIDE).add(StructuredDataKey.INTANGIBLE_PROJECTILE)
+            .add(StructuredDataKey.STORED_ENCHANTMENTS).add(StructuredDataKey.DYED_COLOR).add(StructuredDataKey.MAP_COLOR)
+            .add(StructuredDataKey.MAP_ID).add(StructuredDataKey.MAP_DECORATIONS).add(StructuredDataKey.MAP_POST_PROCESSING)
+            .add(StructuredDataKey.CHARGED_PROJECTILES).add(StructuredDataKey.BUNDLE_CONTENTS).add(StructuredDataKey.POTION_CONTENTS)
+            .add(StructuredDataKey.SUSPICIOUS_STEW_EFFECTS).add(StructuredDataKey.WRITABLE_BOOK_CONTENT).add(StructuredDataKey.WRITTEN_BOOK_CONTENT)
+            .add(StructuredDataKey.TRIM).add(StructuredDataKey.DEBUG_STICK_STATE).add(StructuredDataKey.ENTITY_DATA)
+            .add(StructuredDataKey.BUCKET_ENTITY_DATA).add(StructuredDataKey.BLOCK_ENTITY_DATA).add(StructuredDataKey.INSTRUMENT)
+            .add(StructuredDataKey.RECIPES).add(StructuredDataKey.LODESTONE_TRACKER).add(StructuredDataKey.FIREWORK_EXPLOSION)
+            .add(StructuredDataKey.FIREWORKS).add(StructuredDataKey.PROFILE).add(StructuredDataKey.NOTE_BLOCK_SOUND)
+            .add(StructuredDataKey.BANNER_PATTERNS).add(StructuredDataKey.BASE_COLOR).add(StructuredDataKey.POT_DECORATIONS)
+            .add(StructuredDataKey.CONTAINER).add(StructuredDataKey.BLOCK_STATE).add(StructuredDataKey.BEES)
+            .add(StructuredDataKey.LOCK).add(StructuredDataKey.CONTAINER_LOOT).add(StructuredDataKey.TOOL)
+            .add(StructuredDataKey.ITEM_NAME).add(StructuredDataKey.OMINOUS_BOTTLE_AMPLIFIER);
+    }
+
+    @Override
+    public void init(final UserConnection connection) {
+        addEntityTracker(connection, new EntityTrackerBase(connection, EntityTypes1_20_5.PLAYER));
+    }
+
+    @Override
+    public MappingData getMappingData() {
+        return MAPPINGS;
+    }
+
+    @Override
+    public EntityPacketRewriter1_21 getEntityRewriter() {
+        return entityRewriter;
+    }
+
+    @Override
+    public BlockItemPacketRewriter1_21 getItemRewriter() {
+        return itemRewriter;
+    }
+
+    @Override
+    public TagRewriter<ClientboundPacket1_20_5> getTagRewriter() {
+        return tagRewriter;
+    }
+
+    @Override
+    protected PacketTypesProvider<ClientboundPacket1_20_5, ClientboundPacket1_20_5, ServerboundPacket1_20_5, ServerboundPacket1_20_5> createPacketTypesProvider() {
+        return new SimplePacketTypesProvider<>(
+            packetTypeMap(unmappedClientboundPacketType, ClientboundPackets1_20_5.class, ClientboundConfigurationPackets1_20_5.class),
+            packetTypeMap(mappedClientboundPacketType, ClientboundPackets1_20_5.class, ClientboundConfigurationPackets1_20_5.class),
+            packetTypeMap(mappedServerboundPacketType, ServerboundPackets1_20_5.class, ServerboundConfigurationPackets1_20_5.class),
+            packetTypeMap(unmappedServerboundPacketType, ServerboundPackets1_20_5.class, ServerboundConfigurationPackets1_20_5.class)
+        );
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocols/protocol1_21to1_20_5/data/MappingData.java

@@ -0,0 +1,42 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2024 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocols.protocol1_21to1_20_5.data;
+
+import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
+import com.github.steveice10.opennbt.tag.builtin.ListTag;
+import com.viaversion.viaversion.api.data.MappingDataBase;
+import com.viaversion.viaversion.api.data.MappingDataLoader;
+
+public final class MappingData extends MappingDataBase {
+
+    private ListTag<CompoundTag> enchantments;
+
+    public MappingData() {
+        super("1.20.5", "1.21");
+    }
+
+    @Override
+    protected void loadExtras(final CompoundTag data) {
+        final CompoundTag extraMappings = MappingDataLoader.INSTANCE.loadNBT("enchantments-1.21.nbt");
+        enchantments = extraMappings.getListTag("entries", CompoundTag.class);
+    }
+
+    public CompoundTag enchantment(final int id) {
+        return enchantments.get(id).copy();
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocols/protocol1_21to1_20_5/data/Paintings1_20_5.java

@@ -0,0 +1,78 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2024 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocols.protocol1_21to1_20_5.data;
+
+public final class Paintings1_20_5 {
+
+    public static final PaintingVariant[] PAINTINGS = {
+        new PaintingVariant("kebab", 1, 1),
+        new PaintingVariant("aztec", 1, 1),
+        new PaintingVariant("alban", 1, 1),
+        new PaintingVariant("aztec2", 1, 1),
+        new PaintingVariant("bomb", 1, 1),
+        new PaintingVariant("plant", 1, 1),
+        new PaintingVariant("wasteland", 1, 1),
+        new PaintingVariant("pool", 2, 1),
+        new PaintingVariant("courbet", 2, 1),
+        new PaintingVariant("sea", 2, 1),
+        new PaintingVariant("sunset", 2, 1),
+        new PaintingVariant("creebet", 2, 1),
+        new PaintingVariant("wanderer", 1, 2),
+        new PaintingVariant("graham", 1, 2),
+        new PaintingVariant("match", 2, 2),
+        new PaintingVariant("bust", 2, 2),
+        new PaintingVariant("stage", 2, 2),
+        new PaintingVariant("void", 2, 2),
+        new PaintingVariant("skull_and_roses", 2, 2),
+        new PaintingVariant("wither", 2, 2),
+        new PaintingVariant("fighters", 4, 2),
+        new PaintingVariant("pointer", 4, 4),
+        new PaintingVariant("pigscene", 4, 4),
+        new PaintingVariant("burning_skull", 4, 4),
+        new PaintingVariant("skeleton", 4, 3),
+        new PaintingVariant("earth", 2, 2),
+        new PaintingVariant("wind", 2, 2),
+        new PaintingVariant("water", 2, 2),
+        new PaintingVariant("fire", 2, 2),
+        new PaintingVariant("donkey_kong", 4, 3)
+    };
+
+    public static final class PaintingVariant {
+        private final String key;
+        private final int width;
+        private final int height;
+
+        public PaintingVariant(final String key, final int width, final int height) {
+            this.key = key;
+            this.width = width;
+            this.height = height;
+        }
+
+        public String key() {
+            return key;
+        }
+
+        public int width() {
+            return width;
+        }
+
+        public int height() {
+            return height;
+        }
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocols/protocol1_21to1_20_5/rewriter/BlockItemPacketRewriter1_21.java

@@ -0,0 +1,62 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2024 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocols.protocol1_21to1_20_5.rewriter;
+
+import com.viaversion.viaversion.api.type.types.chunk.ChunkType1_20_2;
+import com.viaversion.viaversion.api.type.types.version.Types1_20_5;
+import com.viaversion.viaversion.api.type.types.version.Types1_21;
+import com.viaversion.viaversion.protocols.protocol1_20_3to1_20_2.rewriter.RecipeRewriter1_20_3;
+import com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.packet.ClientboundPacket1_20_5;
+import com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.packet.ClientboundPackets1_20_5;
+import com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.packet.ServerboundPacket1_20_5;
+import com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.packet.ServerboundPackets1_20_5;
+import com.viaversion.viaversion.protocols.protocol1_21to1_20_5.Protocol1_21To1_20_5;
+import com.viaversion.viaversion.rewriter.BlockRewriter;
+import com.viaversion.viaversion.rewriter.StructuredItemRewriter;
+
+public final class BlockItemPacketRewriter1_21 extends StructuredItemRewriter<ClientboundPacket1_20_5, ServerboundPacket1_20_5, Protocol1_21To1_20_5> {
+
+    public BlockItemPacketRewriter1_21(final Protocol1_21To1_20_5 protocol) {
+        super(protocol, Types1_20_5.ITEM, Types1_20_5.ITEM_ARRAY, Types1_21.ITEM, Types1_21.ITEM_ARRAY);
+    }
+
+    @Override
+    public void registerPackets() {
+        final BlockRewriter<ClientboundPacket1_20_5> blockRewriter = BlockRewriter.for1_20_2(protocol);
+        blockRewriter.registerBlockAction(ClientboundPackets1_20_5.BLOCK_ACTION);
+        blockRewriter.registerBlockChange(ClientboundPackets1_20_5.BLOCK_CHANGE);
+        blockRewriter.registerVarLongMultiBlockChange1_20(ClientboundPackets1_20_5.MULTI_BLOCK_CHANGE);
+        blockRewriter.registerEffect(ClientboundPackets1_20_5.EFFECT, 1010, 2001);
+        blockRewriter.registerChunkData1_19(ClientboundPackets1_20_5.CHUNK_DATA, ChunkType1_20_2::new);
+        blockRewriter.registerBlockEntityData(ClientboundPackets1_20_5.BLOCK_ENTITY_DATA);
+
+        registerSetCooldown(ClientboundPackets1_20_5.COOLDOWN);
+        registerWindowItems1_17_1(ClientboundPackets1_20_5.WINDOW_ITEMS);
+        registerSetSlot1_17_1(ClientboundPackets1_20_5.SET_SLOT);
+        registerAdvancements1_20_3(ClientboundPackets1_20_5.ADVANCEMENTS);
+        registerEntityEquipmentArray(ClientboundPackets1_20_5.ENTITY_EQUIPMENT);
+        registerClickWindow1_17_1(ServerboundPackets1_20_5.CLICK_WINDOW);
+        registerTradeList1_20_5(ClientboundPackets1_20_5.TRADE_LIST, Types1_20_5.ITEM_COST, Types1_20_5.ITEM_COST, Types1_21.OPTIONAL_ITEM_COST, Types1_21.OPTIONAL_ITEM_COST);
+        registerCreativeInvAction(ServerboundPackets1_20_5.CREATIVE_INVENTORY_ACTION);
+        registerWindowPropertyEnchantmentHandler(ClientboundPackets1_20_5.WINDOW_PROPERTY);
+        registerSpawnParticle1_20_5(ClientboundPackets1_20_5.SPAWN_PARTICLE, Types1_20_5.PARTICLE, Types1_21.PARTICLE);
+        registerExplosion(ClientboundPackets1_20_5.EXPLOSION, Types1_20_5.PARTICLE, Types1_21.PARTICLE); // Rewrites the included sound and particles
+
+        new RecipeRewriter1_20_3<>(protocol).register1_20_5(ClientboundPackets1_20_5.DECLARE_RECIPES);
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocols/protocol1_21to1_20_5/rewriter/EntityPacketRewriter1_21.java

@@ -0,0 +1,150 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2024 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocols.protocol1_21to1_20_5.rewriter;
+
+import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
+import com.viaversion.viaversion.api.minecraft.RegistryEntry;
+import com.viaversion.viaversion.api.minecraft.entities.EntityType;
+import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_20_5;
+import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
+import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
+import com.viaversion.viaversion.api.type.Type;
+import com.viaversion.viaversion.api.type.types.version.Types1_20_5;
+import com.viaversion.viaversion.api.type.types.version.Types1_21;
+import com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.data.Enchantments1_20_5;
+import com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.packet.ClientboundConfigurationPackets1_20_5;
+import com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.packet.ClientboundPacket1_20_5;
+import com.viaversion.viaversion.protocols.protocol1_20_5to1_20_3.packet.ClientboundPackets1_20_5;
+import com.viaversion.viaversion.protocols.protocol1_21to1_20_5.Protocol1_21To1_20_5;
+import com.viaversion.viaversion.protocols.protocol1_21to1_20_5.data.Paintings1_20_5;
+import com.viaversion.viaversion.rewriter.EntityRewriter;
+import com.viaversion.viaversion.util.Key;
+
+public final class EntityPacketRewriter1_21 extends EntityRewriter<ClientboundPacket1_20_5, Protocol1_21To1_20_5> {
+
+    public EntityPacketRewriter1_21(final Protocol1_21To1_20_5 protocol) {
+        super(protocol);
+    }
+
+    @Override
+    public void registerPackets() {
+        registerTrackerWithData1_19(ClientboundPackets1_20_5.SPAWN_ENTITY, EntityTypes1_20_5.FALLING_BLOCK);
+        registerMetadataRewriter(ClientboundPackets1_20_5.ENTITY_METADATA, Types1_20_5.METADATA_LIST, Types1_21.METADATA_LIST);
+        registerRemoveEntities(ClientboundPackets1_20_5.REMOVE_ENTITIES);
+
+        protocol.registerClientbound(ClientboundConfigurationPackets1_20_5.REGISTRY_DATA, new PacketHandlers() {
+            @Override
+            protected void register() {
+                map(Type.STRING); // Registry
+                map(Type.REGISTRY_ENTRY_ARRAY); // Data
+                handler(registryDataHandler1_20_5());
+                handler(wrapper -> {
+                    // Add required damage type
+                    final String type = wrapper.get(Type.STRING, 0);
+                    final RegistryEntry[] entries = wrapper.get(Type.REGISTRY_ENTRY_ARRAY, 0);
+                    if (Key.stripMinecraftNamespace(type).equals("damage_type")) {
+                        final CompoundTag campfireDamageType = new CompoundTag();
+                        campfireDamageType.putString("scaling", "when_caused_by_living_non_player");
+                        campfireDamageType.putString("message_id", "inFire");
+                        campfireDamageType.putFloat("exhaustion", 0.1F);
+                        wrapper.set(Type.REGISTRY_ENTRY_ARRAY, 0, addRegistryEnties(entries, new RegistryEntry("minecraft:campfire", campfireDamageType)));
+                    }
+                });
+            }
+        });
+
+        protocol.registerClientbound(ClientboundConfigurationPackets1_20_5.FINISH_CONFIGURATION, wrapper -> {
+            // Add new registries
+            final PacketWrapper paintingRegistryPacket = wrapper.create(ClientboundConfigurationPackets1_20_5.REGISTRY_DATA);
+            paintingRegistryPacket.write(Type.STRING, "minecraft:painting_variant");
+            final RegistryEntry[] paintingsRegistry = new RegistryEntry[Paintings1_20_5.PAINTINGS.length];
+            for (int i = 0; i < Paintings1_20_5.PAINTINGS.length; i++) {
+                final Paintings1_20_5.PaintingVariant painting = Paintings1_20_5.PAINTINGS[i];
+                final CompoundTag tag = new CompoundTag();
+                tag.putInt("width", painting.width());
+                tag.putInt("height", painting.height());
+                tag.putString("asset_id", painting.key());
+                paintingsRegistry[i] = new RegistryEntry(painting.key(), tag);
+            }
+            paintingRegistryPacket.write(Type.REGISTRY_ENTRY_ARRAY, paintingsRegistry);
+            paintingRegistryPacket.send(Protocol1_21To1_20_5.class);
+
+            final PacketWrapper enchantmentRegistryPacket = wrapper.create(ClientboundConfigurationPackets1_20_5.REGISTRY_DATA);
+            enchantmentRegistryPacket.write(Type.STRING, "minecraft:enchantment");
+            final RegistryEntry[] enchantmentRegistry = new RegistryEntry[Enchantments1_20_5.ENCHANTMENTS.size()];
+            for (int i = 0; i < Enchantments1_20_5.ENCHANTMENTS.size(); i++) {
+                final String key = Enchantments1_20_5.idToKey(i);
+                final CompoundTag tag = protocol.getMappingData().enchantment(i);
+                enchantmentRegistry[i] = new RegistryEntry(key, tag);
+            }
+            enchantmentRegistryPacket.write(Type.REGISTRY_ENTRY_ARRAY, enchantmentRegistry);
+            enchantmentRegistryPacket.send(Protocol1_21To1_20_5.class);
+        });
+
+        protocol.registerClientbound(ClientboundPackets1_20_5.JOIN_GAME, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Type.INT); // Entity id
+                map(Type.BOOLEAN); // Hardcore
+                map(Type.STRING_ARRAY); // World List
+                map(Type.VAR_INT); // Max players
+                map(Type.VAR_INT); // View distance
+                map(Type.VAR_INT); // Simulation distance
+                map(Type.BOOLEAN); // Reduced debug info
+                map(Type.BOOLEAN); // Show death screen
+                map(Type.BOOLEAN); // Limited crafting
+                map(Type.VAR_INT); // Dimension id
+                map(Type.STRING); // World
+                handler(worldDataTrackerHandlerByKey1_20_5(3));
+                handler(playerTrackerHandler());
+            }
+        });
+
+        protocol.registerClientbound(ClientboundPackets1_20_5.RESPAWN, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Type.VAR_INT); // Dimension
+                map(Type.STRING); // World
+                handler(worldDataTrackerHandlerByKey1_20_5(0)); // Tracks world height and name for chunk data and entity (un)tracking
+            }
+        });
+    }
+
+    @Override
+    protected void registerRewrites() {
+        filter().mapMetaType(Types1_21.META_TYPES::byId);
+
+        registerMetaTypeHandler(
+            Types1_21.META_TYPES.itemType,
+            Types1_21.META_TYPES.blockStateType,
+            Types1_21.META_TYPES.optionalBlockStateType,
+            Types1_21.META_TYPES.particleType,
+            Types1_21.META_TYPES.particlesType
+        );
+
+        filter().type(EntityTypes1_20_5.MINECART_ABSTRACT).index(11).handler((event, meta) -> {
+            final int blockState = meta.value();
+            meta.setValue(protocol.getMappingData().getNewBlockStateId(blockState));
+        });
+    }
+
+    @Override
+    public EntityType typeFromId(final int type) {
+        return EntityTypes1_20_5.getTypeFromId(type);
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocols/v1_20_3to1_20_5/Protocol1_20_3To1_20_5.java

@@ -253,7 +253,7 @@ public final class Protocol1_20_3To1_20_5 extends AbstractProtocol<ClientboundPa
             .reader("dust_pillar", ParticleType.Readers.BLOCK)
             .reader("falling_dust", ParticleType.Readers.BLOCK)
             .reader("dust_color_transition", ParticleType.Readers.DUST_TRANSITION)
-            .reader("item", ParticleType.Readers.ITEM1_20_5)
+            .reader("item", ParticleType.Readers.item(Types1_20_5.ITEM))
             .reader("vibration", ParticleType.Readers.VIBRATION1_20_3)
             .reader("sculk_charge", ParticleType.Readers.SCULK_CHARGE)
             .reader("shriek", ParticleType.Readers.SHRIEK)

common/src/main/java/com/viaversion/viaversion/protocols/v1_20_3to1_20_5/rewriter/BlockItemPacketRewriter1_20_5.java

@@ -340,7 +340,7 @@ public final class BlockItemPacketRewriter1_20_5 extends ItemRewriter<Clientboun
                 wrapper.passthrough(Types.STRING); // Recipe Identifier
 
                 wrapper.write(Types.VAR_INT, protocol.getMappingData().getRecipeSerializerMappings().mappedId(type));
-                recipeRewriter.handleRecipeType(wrapper, Key.stripMinecraftNamespace(type));
+                recipeRewriter.handleRecipeType(wrapper, type);
             }
         });
     }

common/src/main/java/com/viaversion/viaversion/rewriter/AttributeRewriter.java

@@ -19,7 +19,7 @@ package com.viaversion.viaversion.rewriter;
 
 import com.viaversion.viaversion.api.protocol.Protocol;
 import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
-import com.viaversion.viaversion.api.type.Types;
+import com.viaversion.viaversion.api.Types.Types;
 
 public class AttributeRewriter<C extends ClientboundPacketType> {
     private final Protocol<C, ?, ?, ?> protocol;
@@ -33,10 +33,24 @@ public class AttributeRewriter<C extends ClientboundPacketType> {
             wrapper.passthrough(Types.VAR_INT); // Entity ID
 
             final int size = wrapper.passthrough(Types.VAR_INT);
+            int newSize = size;
             for (int i = 0; i < size; i++) {
                 final int attributeId = wrapper.read(Types.VAR_INT);
-                wrapper.write(Types.VAR_INT, protocol.getMappingData().getNewAttributeId(attributeId));
+                final int mappedId = protocol.getMappingData().getNewAttributeId(attributeId);
+                if (mappedId == -1) {
+                    newSize--;
 
+                    wrapper.read(Types.DOUBLE); // Base
+                    final int modifierSize = wrapper.read(Types.VAR_INT);
+                    for (int j = 0; j < modifierSize; j++) {
+                        wrapper.read(Types.UUID); // ID
+                        wrapper.read(Types.DOUBLE); // Amount
+                        wrapper.read(Types.BYTE); // Operation
+                    }
+                    continue;
+                }
+
+                wrapper.write(Types.VAR_INT, mappedId);
                 wrapper.passthrough(Types.DOUBLE); // Base
                 final int modifierSize = wrapper.passthrough(Types.VAR_INT);
                 for (int j = 0; j < modifierSize; j++) {
@@ -45,6 +59,10 @@ public class AttributeRewriter<C extends ClientboundPacketType> {
                     wrapper.passthrough(Types.BYTE); // Operation
                 }
             }
+
+            if (size != newSize) {
+                wrapper.set(Types.VAR_INT, 1, newSize);
+            }
         });
     }
 }

common/src/main/java/com/viaversion/viaversion/rewriter/EntityRewriter.java

@@ -51,6 +51,7 @@ import com.viaversion.viaversion.rewriter.entitydata.EntityDataHandlerEventImpl;
 import com.viaversion.viaversion.util.Key;
 import com.viaversion.viaversion.util.TagUtil;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Comparator;
 import java.util.HashMap;
 import java.util.List;
@@ -579,6 +580,13 @@ public abstract class EntityRewriter<C extends ClientboundPacketType, T extends
 
     // ---------------------------------------------------------------------------
 
+    public RegistryEntry[] addRegistryEnties(final RegistryEntry[] entries, final RegistryEntry... toAdd) {
+        final int length = entries.length;
+        final RegistryEntry[] newEntries = Arrays.copyOf(entries, length + toAdd.length);
+        System.arraycopy(toAdd, 0, newEntries, length, toAdd.length);
+        return newEntries;
+    }
+
     public void rewriteParticle(UserConnection connection, Particle particle) {
         ParticleMappings mappings = protocol.getMappingData().getParticleMappings();
         int id = particle.id();

common/src/main/java/com/viaversion/viaversion/rewriter/RecipeRewriter.java

@@ -56,7 +56,7 @@ public class RecipeRewriter<C extends ClientboundPacketType> {
     }
 
     public void handleRecipeType(PacketWrapper wrapper, String type) {
-        RecipeConsumer handler = recipeHandlers.get(type);
+        RecipeConsumer handler = recipeHandlers.get(Key.stripMinecraftNamespace(type));
         if (handler != null) {
             handler.accept(wrapper);
         }
@@ -73,7 +73,7 @@ public class RecipeRewriter<C extends ClientboundPacketType> {
             for (int i = 0; i < size; i++) {
                 String type = wrapper.passthrough(Types.STRING);
                 wrapper.passthrough(Types.STRING); // Recipe Identifier
-                handleRecipeType(wrapper, Key.stripMinecraftNamespace(type));
+                handleRecipeType(wrapper, type);
             }
         });
     }

gradle.properties

@@ -1,5 +1,5 @@
 # Project properties - we put these here so they can be modified without causing a recompile of the build scripts
-projectVersion=5.0.0-SNAPSHOT
+projectVersion=5.0.0-24w18a-SNAPSHOT
 
 # Smile emoji
 mcVersions=1.20.6,1.20.5,1.20.4, 1.20.3, 1.20.2, 1.20.1, 1.20, 1.19.4, 1.19.3, 1.19.2, 1.19.1, 1.19, 1.18.2, 1.18.1, 1.18, 1.17.1, 1.17, 1.16.5, 1.16.4, 1.16.3, 1.16.2, 1.16.1, 1.16, 1.15.2, 1.15.1, 1.15, 1.14.4, 1.14.3, 1.14.2, 1.14.1, 1.14, 1.13.2, 1.13.1, 1.13, 1.12.2, 1.12.1, 1.12, 1.11.2, 1.11.1, 1.11, 1.10.2, 1.10.1, 1.10, 1.9.4, 1.9.3, 1.9.2, 1.9.1, 1.9, 1.8.9

template/src/main/java/com/viaversion/viaversion/template/protocols/Protocol1_99To_98.java

@@ -22,6 +22,8 @@ import com.viaversion.viaversion.api.data.MappingData;
 import com.viaversion.viaversion.api.data.MappingDataBase;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_20_5;
 import com.viaversion.viaversion.api.protocol.AbstractProtocol;
+import com.viaversion.viaversion.api.protocol.packet.provider.PacketTypesProvider;
+import com.viaversion.viaversion.api.protocol.packet.provider.SimplePacketTypesProvider;
 import com.viaversion.viaversion.data.entity.EntityTrackerBase;
 import com.viaversion.viaversion.protocols.v1_20_3to1_20_5.packet.ClientboundConfigurationPackets1_20_5;
 import com.viaversion.viaversion.protocols.v1_20_3to1_20_5.packet.ClientboundPacket1_20_5;
@@ -34,6 +36,8 @@ import com.viaversion.viaversion.rewriter.TagRewriter;
 import com.viaversion.viaversion.template.protocols.rewriter.BlockItemPacketRewriter1_99;
 import com.viaversion.viaversion.template.protocols.rewriter.EntityPacketRewriter1_99;
 
+import static com.viaversion.viaversion.util.ProtocolUtil.packetTypeMap;
+
 // Placeholders to replace (in the entire package):
 //   Protocol1_99To_98, EntityPacketRewriter1_99, BlockItemPacketRewriter1_99
 //   ClientboundPacket1_20_5
@@ -130,4 +134,14 @@ public final class Protocol1_99To_98 extends AbstractProtocol<ClientboundPacket1
     public TagRewriter<ClientboundPacket1_20_5> getTagRewriter() {
         return tagRewriter;
     }
+
+    @Override
+    protected PacketTypesProvider<ClientboundPacket1_20_5, ClientboundPacket1_20_5, ServerboundPacket1_20_5, ServerboundPacket1_20_5> createPacketTypesProvider() {
+        return new SimplePacketTypesProvider<>(
+            packetTypeMap(unmappedClientboundPacketType, ClientboundPackets1_20_5.class, ClientboundConfigurationPackets1_20_5.class),
+            packetTypeMap(mappedClientboundPacketType, ClientboundPackets1_20_5.class, ClientboundConfigurationPackets1_20_5.class),
+            packetTypeMap(mappedServerboundPacketType, ServerboundPackets1_20_5.class, ServerboundConfigurationPackets1_20_5.class),
+            packetTypeMap(unmappedServerboundPacketType, ServerboundPackets1_20_5.class, ServerboundConfigurationPackets1_20_5.class)
+        );
+    }
 }