Update Gradle Wrapper from 8.11.1 to 8.12

Signed-off-by: gradle-update-robot <gradle-update-robot@regolo.cc>

.editorconfig

@@ -2,7 +2,7 @@
 charset = utf-8
 indent_size = 4
 indent_style = space
-insert_final_newline = false
+insert_final_newline = true
 tab_width = 4
 
 [*.java]

.github/FUNDING.yml

@@ -1,2 +1,3 @@
 github: kennytv
 patreon: kennytv
+custom: ['https://florianmichael.de/donate']

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/build.yml

@@ -6,13 +6,13 @@ jobs:
   build:
     if: ${{ github.event_name != 'pull_request' || github.repository != github.event.pull_request.head.repo.full_name }}
 
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
 
     steps:
     - name: Checkout Repository
       uses: actions/checkout@v4
     - name: Validate Gradle Wrapper
-      uses: gradle/wrapper-validation-action@v2
+      uses: gradle/actions/wrapper-validation@v4
     - name: Set up JDK 17
       uses: actions/setup-java@v4
       with:

.github/workflows/publish.yml

@@ -8,12 +8,12 @@ on:
 jobs:
   publish:
     if: github.repository_owner == 'ViaVersion'
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     steps:
       - name: Checkout Repository
         uses: actions/checkout@v4
       - name: Validate Gradle Wrapper
-        uses: gradle/wrapper-validation-action@v2
+        uses: gradle/actions/wrapper-validation@v4
       - name: Set up JDK 17
         uses: actions/setup-java@v4
         with:

.github/workflows/update-gradle-wrapper.yml

@@ -0,0 +1,14 @@
+name: Update Gradle Wrapper
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: "0 0 * * 0"
+
+jobs:
+  update-gradle-wrapper:
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+      - name: Update Gradle Wrapper
+        uses: gradle-update/update-gradle-wrapper-action@v2

.gitignore

@@ -107,3 +107,6 @@ nbdist/
 nbactions.xml
 nb-configuration.xml
 .nb-gradle/
+
+### Run Folder (ViaProxy) ###
+common/run/

README.md

@@ -4,16 +4,24 @@
 [![Build Status](https://github.com/ViaVersion/ViaBackwards/actions/workflows/gradle.yml/badge.svg?branch=master)](https://github.com/ViaVersion/ViaBackwards/actions)
 [![Discord](https://img.shields.io/badge/chat-on%20discord-blue.svg)](https://viaversion.com/discord)
 
-**Allows older Minecraft client versions to connect to newer server versions.**
+**Allows the connection of older clients to newer server versions for Minecraft servers.**
 
 Requires [ViaVersion](https://hangar.papermc.io/ViaVersion/ViaVersion) to be installed..
 
 Supported Versions
 -
-As a plugin, ViaBackwards runs on servers on releases 1.10-latest. Versions from the dev branch will also support the
-latest snapshot. You can also use ViaBackwards in ViaFabric or ViaFabricPlus.
+As a plugin, ViaBackwards runs on servers on releases 1.10-latest. You can also use ViaBackwards in ViaFabric or ViaFabricPlus.
+- in **ViaFabric**, put ViaBackwards into the `mods` folder
+- in **ViaFabricPlus**, put ViaBackwards into the `ViaFabricPlus/jars` folder
 
-See [HERE](https://github.com/ViaVersion) for an overview of the different Via* projects.
+See [HERE](https://viaversion.com) for an overview of the different Via* projects.
+
+Snapshot support
+--------
+**ViaBackwards will only be released a few days *after* a Minecraft update** unless the protocol changes of the update were trivial. If you want early-access, usually days or even weeks before the final release, you can subscribe to either:
+- [GitHub Sponsors](https://github.com/sponsors/kennytv/sponsorships?sponsor=kennytv&tier_id=385613&preview=false) (preferred option. Use the `/verify` command on this Discord after), or alternatively
+- [Patreon](https://www.patreon.com/kennytv/membership) (see the highest tier and make sure to link Patreon to your Discord account under Settings->Connections)
+  This also includes access to a private repository with the code, which will be pushed to the public repository after the given delay on a Minecraft update.
 
 Releases/Dev Builds
 -

build-logic/build.gradle.kts

@@ -8,5 +8,5 @@ repositories {
 
 dependencies {
     // version must be manually kept in sync with the one in root project settings.gradle.kts
-    implementation("com.github.johnrengelman", "shadow", "8.1.1")
+    implementation("com.gradleup.shadow", "shadow-gradle-plugin", "8.3.0")
 }

build-logic/src/main/kotlin/extensions.kt

@@ -1,33 +1,23 @@
-import org.gradle.api.JavaVersion
 import org.gradle.api.Project
 import org.gradle.api.plugins.JavaPluginExtension
-import java.io.ByteArrayOutputStream
+import org.gradle.jvm.toolchain.JavaLanguageVersion
 
 fun Project.latestCommitHash(): String {
-    val byteOut = ByteArrayOutputStream()
-    exec {
-        commandLine = listOf("git", "rev-parse", "--short", "HEAD")
-        standardOutput = byteOut
-    }
-    return byteOut.toString(Charsets.UTF_8.name()).trim()
+    return runGitCommand(listOf("rev-parse", "--short", "HEAD"))
 }
 
 fun Project.latestCommitMessage(): String {
-    val byteOut = ByteArrayOutputStream()
-    exec {
-        commandLine = listOf("git", "log", "-1", "--pretty=%B")
-        standardOutput = byteOut
-    }
-    return byteOut.toString(Charsets.UTF_8.name()).trim()
+    return runGitCommand(listOf("log", "-1", "--pretty=%B"))
 }
 
 fun Project.branchName(): String {
-    val byteOut = ByteArrayOutputStream()
-    exec {
-        commandLine = listOf("git", "rev-parse", "--abbrev-ref", "HEAD")
-        standardOutput = byteOut
-    }
-    return byteOut.toString(Charsets.UTF_8.name()).trim()
+    return runGitCommand(listOf("rev-parse", "--abbrev-ref", "HEAD"))
+}
+
+fun Project.runGitCommand(args: List<String>): String {
+    return providers.exec {
+        commandLine = listOf("git") + args
+    }.standardOutput.asBytes.get().toString(Charsets.UTF_8).trim()
 }
 
 fun Project.parseMinecraftSnapshotVersion(version: String): String? {
@@ -40,6 +30,5 @@ fun Project.parseMinecraftSnapshotVersion(version: String): String? {
 }
 
 fun JavaPluginExtension.javaTarget(version: Int) {
-    sourceCompatibility = JavaVersion.toVersion(version)
-    targetCompatibility = JavaVersion.toVersion(version)
+    toolchain.languageVersion.set(JavaLanguageVersion.of(version))
 }

build-logic/src/main/kotlin/vb.base-conventions.gradle.kts

@@ -5,7 +5,7 @@ plugins {
 tasks {
     // Variable replacements
     processResources {
-        filesMatching(listOf("plugin.yml", "fabric.mod.json")) {
+        filesMatching(listOf("plugin.yml", "META-INF/sponge_plugins.json", "fabric.mod.json")) {
             expand("version" to project.version, "description" to project.description, "url" to "https://viaversion.com/backwards")
         }
     }
@@ -22,4 +22,4 @@ tasks {
 java {
     javaTarget(17)
     withSourcesJar()
-}
+}

build-logic/src/main/kotlin/vb.shadow-conventions.gradle.kts

@@ -5,7 +5,7 @@ import org.gradle.kotlin.dsl.named
 plugins {
     id("vb.base-conventions")
     id("maven-publish")
-    id("com.github.johnrengelman.shadow")
+    id("com.gradleup.shadow")
 }
 
 tasks {

build.gradle.kts

@@ -6,7 +6,7 @@ plugins {
 allprojects {
     group = "com.viaversion"
     version = property("projectVersion") as String // from gradle.properties
-    description = "Allows older Minecraft client versions to connect to newer server versions."
+    description = "Allows the connection of older clients to newer server versions for Minecraft servers."
 }
 
 val main = setOf(
@@ -14,11 +14,12 @@ val main = setOf(
     projects.viabackwardsCommon,
     projects.viabackwardsBukkit,
     projects.viabackwardsVelocity,
+    projects.viabackwardsSponge,
     projects.viabackwardsFabric
-).map { it.dependencyProject }
+).map { it.path }
 
 subprojects {
-    when (this) {
+    when (path) {
         in main -> plugins.apply("vb.shadow-conventions")
         else -> plugins.apply("vb.base-conventions")
     }

bukkit/src/main/java/com/viaversion/viabackwards/BukkitPlugin.java

@@ -48,7 +48,10 @@ public class BukkitPlugin extends JavaPlugin implements ViaBackwardsPlatform {
         }
     }
 
-    private void enable() {
+    @Override
+    public void enable() {
+        ViaBackwardsPlatform.super.enable();
+
         final ProtocolVersion protocolVersion = Via.getAPI().getServerVersion().highestSupportedProtocolVersion();
         if (protocolVersion.newerThanOrEqualTo(ProtocolVersion.v1_17)) {
             new PlayerItemDropListener(this).register();

bukkit/src/main/java/com/viaversion/viabackwards/provider/BukkitAdvancementCriteriaProvider.java

@@ -27,8 +27,8 @@ public final class BukkitAdvancementCriteriaProvider extends AdvancementCriteria
     private static final String[] EMPTY_CRITERIA = new String[0];
 
     @Override
-    public String[] getCriteria(final String key) {
-        final Advancement advancement = Bukkit.getAdvancement(NamespacedKey.fromString(key));
+    public String[] getCriteria(final String advancementKey) {
+        final Advancement advancement = Bukkit.getAdvancement(NamespacedKey.fromString(advancementKey));
         return advancement == null ? EMPTY_CRITERIA : advancement.getCriteria().toArray(EMPTY_CRITERIA);
     }
 }

common/build.gradle.kts

@@ -24,3 +24,32 @@ dependencies {
 java {
     withJavadocJar()
 }
+
+// Task to quickly test/debug code changes using https://github.com/ViaVersion/ViaProxy
+// For further instructions see the ViaProxy repository README
+tasks.register<JavaExec>("runViaProxy") {
+    dependsOn(tasks.shadowJar)
+
+    val viaProxyConfiguration = configurations.create("viaProxy")
+    viaProxyConfiguration.dependencies.add(dependencies.create(rootProject.libs.viaProxy.get().copy().setTransitive(false)))
+
+    mainClass.set("net.raphimc.viaproxy.ViaProxy")
+    classpath = viaProxyConfiguration
+    workingDir = file("run")
+    jvmArgs = listOf("-DskipUpdateCheck")
+
+    if (System.getProperty("viaproxy.gui.autoStart") != null) {
+        jvmArgs("-Dviaproxy.gui.autoStart")
+    }
+
+    doFirst {
+        val jarsDir = file("$workingDir/jars")
+        jarsDir.mkdirs()
+        file("$jarsDir/${project.name}.jar").writeBytes(tasks.shadowJar.get().archiveFile.get().asFile.readBytes())
+    }
+
+    doLast {
+        file("$workingDir/jars/${project.name}.jar").delete()
+        file("$workingDir/logs").deleteRecursively()
+    }
+}

common/src/main/java/com/viaversion/viabackwards/ViaBackwardsConfig.java

@@ -34,6 +34,9 @@ public class ViaBackwardsConfig extends Config implements com.viaversion.viaback
     private boolean alwaysShowOriginalMobName;
     private boolean fix1_13FormattedInventoryTitles;
     private boolean handlePingsAsInvAcknowledgements;
+    private boolean bedrockAtY0;
+    private boolean sculkShriekersToCryingObsidian;
+    private boolean mapDarknessEffect;
     private boolean suppressEmulationWarnings;
 
     public ViaBackwardsConfig(File configFile, Logger logger) {
@@ -53,6 +56,9 @@ public class ViaBackwardsConfig extends Config implements com.viaversion.viaback
         fix1_13FormattedInventoryTitles = getBoolean("fix-formatted-inventory-titles", true);
         alwaysShowOriginalMobName = getBoolean("always-show-original-mob-name", true);
         handlePingsAsInvAcknowledgements = getBoolean("handle-pings-as-inv-acknowledgements", false);
+        bedrockAtY0 = getBoolean("bedrock-at-y-0", false);
+        sculkShriekersToCryingObsidian = getBoolean("sculk-shriekers-to-crying-obsidian", false);
+        mapDarknessEffect = getBoolean("map-darkness-effect", true);
         suppressEmulationWarnings = getBoolean("suppress-emulation-warnings", false);
     }
 
@@ -86,6 +92,21 @@ public class ViaBackwardsConfig extends Config implements com.viaversion.viaback
         return handlePingsAsInvAcknowledgements || Boolean.getBoolean("com.viaversion.handlePingsAsInvAcknowledgements");
     }
 
+    @Override
+    public boolean bedrockAtY0() {
+        return bedrockAtY0;
+    }
+
+    @Override
+    public boolean sculkShriekerToCryingObsidian() {
+        return sculkShriekersToCryingObsidian;
+    }
+
+    @Override
+    public boolean mapDarknessEffect() {
+        return mapDarknessEffect;
+    }
+
     @Override
     public boolean suppressEmulationWarnings() {
         return suppressEmulationWarnings;

common/src/main/java/com/viaversion/viabackwards/api/ViaBackwardsConfig.java

@@ -64,6 +64,27 @@ public interface ViaBackwardsConfig extends Config {
      */
     boolean handlePingsAsInvAcknowledgements();
 
+    /**
+     * Adds bedrock at y=0 for sub 1.17 clients.
+     *
+     * @return true if enabled
+     */
+    boolean bedrockAtY0();
+
+    /**
+     * Shows sculk shriekers as crying obsidian for 1.18.2 clients on 1.19+ servers. This fixes collision and block breaking issues.
+     *
+     * @return true if enabled
+     */
+    boolean sculkShriekerToCryingObsidian();
+
+    /**
+     * Maps the darkness effect to blindness for 1.18.2 clients on 1.19+ servers.
+     *
+     * @return true if enabled
+     */
+    boolean mapDarknessEffect();
+
     /**
      * Suppresses warnings of missing emulations for certain features that are not supported (e.g. world height in 1.17+).
      *

common/src/main/java/com/viaversion/viabackwards/api/ViaBackwardsPlatform.java

@@ -49,11 +49,14 @@ import com.viaversion.viabackwards.protocol.v1_19to1_18_2.Protocol1_19To1_18_2;
 import com.viaversion.viabackwards.protocol.v1_18_2to1_18.Protocol1_18_2To1_18;
 import com.viaversion.viabackwards.protocol.v1_19_3to1_19_1.Protocol1_19_3To1_19_1;
 import com.viaversion.viabackwards.protocol.v1_19_4to1_19_3.Protocol1_19_4To1_19_3;
+import com.viaversion.viabackwards.protocol.v1_21_4to1_21_2.Protocol1_21_4To1_21_2;
 import com.viaversion.viabackwards.protocol.v1_20to1_19_4.Protocol1_20To1_19_4;
 import com.viaversion.viabackwards.protocol.v1_19_1to1_19.Protocol1_19_1To1_19;
 import com.viaversion.viabackwards.protocol.v1_20_3to1_20_2.Protocol1_20_3To1_20_2;
 import com.viaversion.viabackwards.protocol.v1_20_5to1_20_3.Protocol1_20_5To1_20_3;
 import com.viaversion.viabackwards.protocol.v1_20_2to1_20.Protocol1_20_2To1_20;
+import com.viaversion.viabackwards.protocol.v1_21_2to1_21.Protocol1_21_2To1_21;
+import com.viaversion.viabackwards.protocol.v1_21_2to1_21.task.PlayerPacketsTickTask;
 import com.viaversion.viabackwards.protocol.v1_21to1_20_5.Protocol1_21To1_20_5;
 import com.viaversion.viabackwards.protocol.v1_9_3to1_9_1.Protocol1_9_3To1_9_1;
 import com.viaversion.viabackwards.protocol.v1_10to1_9_3.Protocol1_10To1_9_3;
@@ -69,7 +72,7 @@ import java.util.logging.Logger;
 
 public interface ViaBackwardsPlatform {
 
-    String MINIMUM_VV_VERSION = "5.0.0";
+    String MINIMUM_VV_VERSION = "5.2.0";
 
     /**
      * Initialize ViaBackwards.
@@ -141,6 +144,15 @@ public interface ViaBackwardsPlatform {
         protocolManager.registerProtocol(new Protocol1_20_5To1_20_3(), ProtocolVersion.v1_20_3, ProtocolVersion.v1_20_5);
 
         protocolManager.registerProtocol(new Protocol1_21To1_20_5(), ProtocolVersion.v1_20_5, ProtocolVersion.v1_21);
+        protocolManager.registerProtocol(new Protocol1_21_2To1_21(), ProtocolVersion.v1_21, ProtocolVersion.v1_21_2);
+        protocolManager.registerProtocol(new Protocol1_21_4To1_21_2(), ProtocolVersion.v1_21_2, ProtocolVersion.v1_21_4);
+    }
+
+    default void enable() {
+        final ProtocolVersion protocolVersion = Via.getAPI().getServerVersion().highestSupportedProtocolVersion();
+        if (protocolVersion.newerThanOrEqualTo(ProtocolVersion.v1_21_2)) {
+            Via.getPlatform().runRepeatingSync(new PlayerPacketsTickTask(), 1L);
+        }
     }
 
     /**

common/src/main/java/com/viaversion/viabackwards/api/data/MappedLegacyBlockItem.java

@@ -71,7 +71,7 @@ public class MappedLegacyBlockItem {
     @FunctionalInterface
     public interface BlockEntityHandler {
 
-        CompoundTag handleOrNewCompoundTag(int block, CompoundTag tag);
+        void handleCompoundTag(int block, CompoundTag tag);
     }
 
     public enum Type {

common/src/main/java/com/viaversion/viabackwards/api/entities/storage/EntityPositionHandler.java

@@ -75,7 +75,11 @@ public class EntityPositionHandler {
             }
         }
 
-        positionStorage.setCoordinates(x, y, z, relative);
+        if (relative) {
+            positionStorage.addRelativePosition(x, y, z);
+        } else {
+            positionStorage.setPosition(x, y, z);
+        }
     }
 
     public EntityPositionStorage getStorage(UserConnection user, int entityId) {

common/src/main/java/com/viaversion/viabackwards/api/entities/storage/EntityPositionStorage.java

@@ -34,15 +34,15 @@ public abstract class EntityPositionStorage {
         return z;
     }
 
-    public void setCoordinates(double x, double y, double z, boolean relative) {
-        if (relative) {
-            this.x += x;
-            this.y += y;
-            this.z += z;
-        } else {
-            this.x = x;
-            this.y = y;
-            this.z = z;
-        }
+    public void setPosition(double x, double y, double z) {
+        this.x = x;
+        this.y = y;
+        this.z = z;
+    }
+
+    public void addRelativePosition(double relX, double relY, double relZ) {
+        this.x += relX;
+        this.y += relY;
+        this.z += relZ;
     }
 }

common/src/main/java/com/viaversion/viabackwards/api/entities/storage/EntityReplacement.java

@@ -31,7 +31,7 @@ public class EntityReplacement {
     private final int replacementId;
     private final String key;
     private ComponentType componentType = ComponentType.NONE;
-    private MetaCreator defaultMeta;
+    private EntityDataCreator defaultData;
 
     public EntityReplacement(BackwardsProtocol<?, ?, ?, ?> protocol, EntityType type, int replacementId) {
         this(protocol, type.name(), type.getId(), replacementId);
@@ -59,13 +59,13 @@ public class EntityReplacement {
         return this;
     }
 
-    public EntityReplacement spawnMetadata(MetaCreator handler) {
-        this.defaultMeta = handler;
+    public EntityReplacement spawnEntityData(EntityDataCreator handler) {
+        this.defaultData = handler;
         return this;
     }
 
-    public boolean hasBaseMeta() {
-        return this.defaultMeta != null;
+    public boolean hasBaseData() {
+        return this.defaultData != null;
     }
 
     public int typeId() {
@@ -97,8 +97,8 @@ public class EntityReplacement {
         return replacementId;
     }
 
-    public @Nullable MetaCreator defaultMeta() {
-        return defaultMeta;
+    public @Nullable EntityDataCreator defaultData() {
+        return defaultData;
     }
 
     public boolean isObjectType() {
@@ -111,18 +111,20 @@ public class EntityReplacement {
 
     @Override
     public String toString() {
-        return "EntityData{" +
-            "id=" + id +
-            ", mobName='" + key + '\'' +
+        return "EntityReplacement{" +
+            "protocol=" + protocol +
+            ", id=" + id +
             ", replacementId=" + replacementId +
-            ", defaultMeta=" + defaultMeta +
+            ", key='" + key + '\'' +
+            ", componentType=" + componentType +
+            ", defaultData=" + defaultData +
             '}';
     }
 
     @FunctionalInterface
-    public interface MetaCreator {
+    public interface EntityDataCreator {
 
-        void createMeta(WrappedMetadata storage);
+        void createData(WrappedEntityData storage);
     }
 
     private enum ComponentType {

common/src/main/java/com/viaversion/viabackwards/api/entities/storage/PlayerPositionStorage.java

@@ -18,8 +18,6 @@
 package com.viaversion.viabackwards.api.entities.storage;
 
 import com.viaversion.viaversion.api.connection.StorableObject;
-import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
-import com.viaversion.viaversion.api.type.Types;
 
 public abstract class PlayerPositionStorage implements StorableObject {
     private double x;
@@ -53,19 +51,15 @@ public abstract class PlayerPositionStorage implements StorableObject {
         this.z = z;
     }
 
-    public void setCoordinates(PacketWrapper wrapper, boolean relative) {
-        setCoordinates(wrapper.get(Types.DOUBLE, 0), wrapper.get(Types.DOUBLE, 1), wrapper.get(Types.DOUBLE, 2), relative);
+    public void setPosition(double x, double y, double z) {
+        this.x = x;
+        this.y = y;
+        this.z = z;
     }
 
-    public void setCoordinates(double x, double y, double z, boolean relative) {
-        if (relative) {
-            this.x += x;
-            this.y += y;
-            this.z += z;
-        } else {
-            this.x = x;
-            this.y = y;
-            this.z = z;
-        }
+    public void addRelativePosition(double relX, double relY, double relZ) {
+        this.x += relX;
+        this.y += relY;
+        this.z += relZ;
     }
 }

common/src/main/java/com/viaversion/viabackwards/api/entities/storage/WrappedEntityData.java

@@ -22,28 +22,28 @@ import com.viaversion.viaversion.api.minecraft.entitydata.EntityData;
 import java.util.List;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
-public record WrappedMetadata(List<EntityData> metadataList) {
+public record WrappedEntityData(List<EntityData> entityDataList) {
 
     public boolean has(EntityData data) {
-        return this.metadataList.contains(data);
+        return this.entityDataList.contains(data);
     }
 
     public void remove(EntityData data) {
-        this.metadataList.remove(data);
+        this.entityDataList.remove(data);
     }
 
     public void remove(int index) {
-        metadataList.removeIf(meta -> meta.id() == index);
+        entityDataList.removeIf(data -> data.id() == index);
     }
 
     public void add(EntityData data) {
-        this.metadataList.add(data);
+        this.entityDataList.add(data);
     }
 
     public @Nullable EntityData get(int index) {
-        for (EntityData meta : this.metadataList) {
-            if (index == meta.id()) {
-                return meta;
+        for (EntityData data : this.entityDataList) {
+            if (index == data.id()) {
+                return data;
             }
         }
         return null;

common/src/main/java/com/viaversion/viabackwards/api/rewriters/BackwardsStructuredItemRewriter.java

@@ -18,39 +18,51 @@
 package com.viaversion.viabackwards.api.rewriters;
 
 import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.nbt.tag.IntArrayTag;
 import com.viaversion.nbt.tag.IntTag;
 import com.viaversion.nbt.tag.ListTag;
-import com.viaversion.nbt.tag.NumberTag;
+import com.viaversion.nbt.tag.StringTag;
 import com.viaversion.nbt.tag.Tag;
 import com.viaversion.viabackwards.api.BackwardsProtocol;
 import com.viaversion.viabackwards.api.data.BackwardsMappingData;
 import com.viaversion.viabackwards.api.data.MappedItem;
 import com.viaversion.viaversion.api.connection.UserConnection;
-import com.viaversion.viaversion.api.data.FullMappings;
-import com.viaversion.viaversion.api.minecraft.data.StructuredData;
+import com.viaversion.viaversion.api.minecraft.Holder;
+import com.viaversion.viaversion.api.minecraft.HolderSet;
 import com.viaversion.viaversion.api.minecraft.data.StructuredDataContainer;
 import com.viaversion.viaversion.api.minecraft.data.StructuredDataKey;
 import com.viaversion.viaversion.api.minecraft.item.Item;
+import com.viaversion.viaversion.api.minecraft.item.data.CustomModelData1_21_4;
 import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
 import com.viaversion.viaversion.api.protocol.packet.ServerboundPacketType;
+import com.viaversion.viaversion.api.protocol.version.ProtocolVersion;
 import com.viaversion.viaversion.api.type.Type;
-import com.viaversion.viaversion.libs.fastutil.ints.Int2IntFunction;
 import com.viaversion.viaversion.rewriter.StructuredItemRewriter;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.function.BiConsumer;
+import java.util.function.Function;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 public class BackwardsStructuredItemRewriter<C extends ClientboundPacketType, S extends ServerboundPacketType,
     T extends BackwardsProtocol<C, ?, ?, S>> extends StructuredItemRewriter<C, S, T> {
 
-    public BackwardsStructuredItemRewriter(final T protocol, final Type<Item> itemType, final Type<Item[]> itemArrayType) {
-        super(protocol, itemType, itemArrayType);
+    public BackwardsStructuredItemRewriter(
+        T protocol,
+        Type<Item> itemType, Type<Item[]> itemArrayType, Type<Item> mappedItemType, Type<Item[]> mappedItemArrayType,
+        Type<Item> itemCostType, Type<Item> optionalItemCostType, Type<Item> mappedItemCostType, Type<Item> mappedOptionalItemCostType
+    ) {
+        super(protocol, itemType, itemArrayType, mappedItemType, mappedItemArrayType, itemCostType, optionalItemCostType, mappedItemCostType, mappedOptionalItemCostType);
     }
 
     public BackwardsStructuredItemRewriter(final T protocol, final Type<Item> itemType, final Type<Item[]> itemArrayType, final Type<Item> mappedItemType, final Type<Item[]> mappedItemArrayType) {
         super(protocol, itemType, itemArrayType, mappedItemType, mappedItemArrayType);
     }
 
+    public BackwardsStructuredItemRewriter(final T protocol, final Type<Item> itemType, final Type<Item[]> itemArrayType) {
+        super(protocol, itemType, itemArrayType);
+    }
+
     @Override
     public Item handleItemToClient(final UserConnection connection, final Item item) {
         if (item.isEmpty()) {
@@ -58,39 +70,9 @@ public class BackwardsStructuredItemRewriter<C extends ClientboundPacketType, S
         }
 
         final StructuredDataContainer dataContainer = item.dataContainer();
+        updateItemDataComponentTypeIds(dataContainer, true);
+
         final BackwardsMappingData mappingData = protocol.getMappingData();
-        if (mappingData != null && mappingData.getDataComponentSerializerMappings() != null) {
-            final FullMappings mappings = mappingData.getDataComponentSerializerMappings();
-            dataContainer.setIdLookup(protocol, true);
-            dataContainer.updateIds(protocol, mappings::getNewId);
-        }
-
-        if (protocol.getComponentRewriter() != null) {
-            // Handle name and lore components
-            final StructuredData<Tag> customNameData = dataContainer.getNonEmpty(StructuredDataKey.CUSTOM_NAME);
-            if (customNameData != null) {
-                final Tag originalName = customNameData.value().copy();
-                protocol.getComponentRewriter().processTag(connection, customNameData.value());
-                if (!customNameData.value().equals(originalName)) {
-                    saveTag(createCustomTag(item), originalName, "Name");
-                }
-            }
-
-            final StructuredData<Tag[]> loreData = dataContainer.getNonEmpty(StructuredDataKey.LORE);
-            if (loreData != null) {
-                for (final Tag tag : loreData.value()) {
-                    protocol.getComponentRewriter().processTag(connection, tag);
-                }
-            }
-        }
-
-        Int2IntFunction itemIdRewriter = null;
-        Int2IntFunction blockIdRewriter = null;
-        if (mappingData != null) {
-            itemIdRewriter = mappingData.getItemMappings() != null ? mappingData::getNewItemId : null;
-            blockIdRewriter = mappingData.getBlockMappings() != null ? mappingData::getNewBlockId : null;
-        }
-
         final MappedItem mappedItem = mappingData != null ? mappingData.getMappedItem(item.identifier()) : null;
         if (mappedItem == null) {
             // Just rewrite the id
@@ -98,7 +80,7 @@ public class BackwardsStructuredItemRewriter<C extends ClientboundPacketType, S
                 item.setIdentifier(mappingData.getNewItemId(item.identifier()));
             }
 
-            updateItemComponents(connection, dataContainer, this::handleItemToClient, itemIdRewriter, blockIdRewriter);
+            updateItemDataComponents(connection, item, true);
             return item;
         }
 
@@ -108,17 +90,28 @@ public class BackwardsStructuredItemRewriter<C extends ClientboundPacketType, S
         item.setIdentifier(mappedItem.id());
 
         // Add custom model data
-        if (mappedItem.customModelData() != null && !dataContainer.contains(StructuredDataKey.CUSTOM_MODEL_DATA)) {
-            dataContainer.set(StructuredDataKey.CUSTOM_MODEL_DATA, mappedItem.customModelData());
+        if (mappedItem.customModelData() != null) {
+            if (connection.getProtocolInfo().protocolVersion().newerThanOrEqualTo(ProtocolVersion.v1_21_4)) {
+                if (!dataContainer.has(StructuredDataKey.CUSTOM_MODEL_DATA1_21_4)) {
+                    dataContainer.set(StructuredDataKey.CUSTOM_MODEL_DATA1_21_4, new CustomModelData1_21_4(
+                        new float[]{mappedItem.customModelData().floatValue()},
+                        new boolean[0],
+                        new String[0],
+                        new int[0]
+                    ));
+                }
+            } else if (!dataContainer.has(StructuredDataKey.CUSTOM_MODEL_DATA1_20_5)) {
+                dataContainer.set(StructuredDataKey.CUSTOM_MODEL_DATA1_20_5, mappedItem.customModelData());
+            }
         }
 
         // Set custom name - only done if there is no original one
-        if (!dataContainer.contains(StructuredDataKey.CUSTOM_NAME)) {
+        if (!dataContainer.has(StructuredDataKey.CUSTOM_NAME)) {
             dataContainer.set(StructuredDataKey.CUSTOM_NAME, mappedItem.tagName());
-            tag.putBoolean(nbtTagName("customName"), true);
+            tag.putBoolean(nbtTagName("added_custom_name"), true);
         }
 
-        updateItemComponents(connection, dataContainer, this::handleItemToClient, itemIdRewriter, blockIdRewriter);
+        updateItemDataComponents(connection, item, true);
         return item;
     }
 
@@ -128,46 +121,27 @@ public class BackwardsStructuredItemRewriter<C extends ClientboundPacketType, S
             return item;
         }
 
-        final BackwardsMappingData mappingData = protocol.getMappingData();
         final StructuredDataContainer dataContainer = item.dataContainer();
-        if (mappingData != null) {
-            if (mappingData.getItemMappings() != null) {
-                item.setIdentifier(mappingData.getOldItemId(item.identifier()));
-            }
+        updateItemDataComponentTypeIds(dataContainer, false);
 
-            final FullMappings dataComponentMappings = mappingData.getDataComponentSerializerMappings();
-            if (dataComponentMappings != null) {
-                dataContainer.setIdLookup(protocol, false);
-                dataContainer.updateIds(protocol, id -> dataComponentMappings.inverse().getNewId(id));
-            }
+        final BackwardsMappingData mappingData = protocol.getMappingData();
+        if (mappingData != null && mappingData.getItemMappings() != null) {
+            item.setIdentifier(mappingData.getOldItemId(item.identifier()));
         }
 
-
-        final CompoundTag tag = customTag(item);
-        if (tag != null) {
-            final Tag originalId = tag.remove(nbtTagName("id"));
-            if (originalId instanceof IntTag) {
-                item.setIdentifier(((NumberTag) originalId).asInt());
+        final CompoundTag customData = dataContainer.get(StructuredDataKey.CUSTOM_DATA);
+        if (customData != null) {
+            if (customData.remove(nbtTagName("id")) instanceof final IntTag originalTag) {
+                item.setIdentifier(originalTag.asInt());
+                removeCustomTag(dataContainer, customData);
             }
         }
 
         restoreTextComponents(item);
-
-        Int2IntFunction itemIdRewriter = null;
-        Int2IntFunction blockIdRewriter = null;
-        if (mappingData != null) {
-            itemIdRewriter = mappingData.getItemMappings() != null ? mappingData::getOldItemId : null;
-            blockIdRewriter = mappingData.getBlockMappings() != null ? mappingData::getOldBlockId : null;
-        }
-        updateItemComponents(connection, dataContainer, this::handleItemToServer, itemIdRewriter, blockIdRewriter);
+        updateItemDataComponents(connection, item, false);
         return item;
     }
 
-    protected @Nullable CompoundTag customTag(final Item item) {
-        final StructuredData<CompoundTag> customData = item.dataContainer().getNonEmpty(StructuredDataKey.CUSTOM_DATA);
-        return customData != null ? customData.value() : null;
-    }
-
     protected void saveListTag(CompoundTag tag, ListTag<?> original, String name) {
         // Multiple places might try to backup data
         String backupName = nbtTagName(name);
@@ -210,6 +184,54 @@ public class BackwardsStructuredItemRewriter<C extends ClientboundPacketType, S
         return new ArrayList<>(data.values());
     }
 
+    protected Tag holderSetToTag(final HolderSet set) {
+        if (set.hasIds()) {
+            return new IntArrayTag(set.ids());
+        } else {
+            return new StringTag(set.tagKey());
+        }
+    }
+
+    protected HolderSet restoreHolderSet(final CompoundTag tag, final String key) {
+        final Tag savedTag = tag.get(key);
+        if (savedTag == null) {
+            return HolderSet.of(new int[0]);
+        }
+
+        if (savedTag instanceof StringTag tagKey) {
+            return HolderSet.of(tagKey.getValue());
+        } else if (savedTag instanceof IntArrayTag idsTag) {
+            return HolderSet.of(idsTag.getValue());
+        } else {
+            return HolderSet.of(new int[0]);
+        }
+    }
+
+    protected <V> Tag holderToTag(final Holder<V> holder, final BiConsumer<V, CompoundTag> valueSaveFunction) {
+        if (holder.hasId()) {
+            return new IntTag(holder.id());
+        } else {
+            final CompoundTag savedTag = new CompoundTag();
+            valueSaveFunction.accept(holder.value(), savedTag);
+            return savedTag;
+        }
+    }
+
+    protected <V> Holder<V> restoreHolder(final CompoundTag tag, final String key, final Function<CompoundTag, V> valueRestoreFunction) {
+        final Tag savedTag = tag.get(key);
+        if (savedTag == null) {
+            return Holder.of(0);
+        }
+
+        if (savedTag instanceof IntTag idTag) {
+            return Holder.of(idTag.asInt());
+        } else if (savedTag instanceof CompoundTag compoundTag) {
+            return Holder.of(valueRestoreFunction.apply(compoundTag));
+        } else {
+            return Holder.of(0);
+        }
+    }
+
     @Override
     public String nbtTagName() {
         return "VB|" + protocol.getClass().getSimpleName();

common/src/main/java/com/viaversion/viabackwards/api/rewriters/EnchantmentRewriter.java

@@ -17,12 +17,12 @@
  */
 package com.viaversion.viabackwards.api.rewriters;
 
+import com.viaversion.viabackwards.utils.ChatUtil;
 import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.nbt.tag.CompoundTag;
 import com.viaversion.nbt.tag.ListTag;
 import com.viaversion.nbt.tag.NumberTag;
 import com.viaversion.nbt.tag.StringTag;
-import com.viaversion.viaversion.util.ComponentUtil;
 import com.viaversion.viaversion.util.Key;
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -35,6 +35,8 @@ import java.util.Map;
  */
 public class EnchantmentRewriter {
 
+    public static final String ENCHANTMENT_LEVEL_TRANSLATION = "enchantment.level.%s";
+
     protected final Map<String, String> enchantmentMappings = new HashMap<>();
     protected final BackwardsItemRewriter<?, ?, ?> itemRewriter;
     private final boolean jsonFormat;
@@ -103,9 +105,11 @@ public class EnchantmentRewriter {
 
                 NumberTag levelTag = enchantmentEntry.getNumberTag("lvl");
                 int level = levelTag != null ? levelTag.asInt() : 1;
-                String loreValue = remappedName + " " + getRomanNumber(level);
+                String loreValue;
                 if (jsonFormat) {
-                    loreValue = ComponentUtil.legacyToJsonString(loreValue);
+                    loreValue = ChatUtil.legacyToJsonString(remappedName, ENCHANTMENT_LEVEL_TRANSLATION.formatted(level), true);
+                } else {
+                    loreValue = remappedName + " " + getRomanNumber(level);
                 }
 
                 loreToAdd.add(new StringTag(loreValue));
@@ -157,7 +161,7 @@ public class EnchantmentRewriter {
             case 8 -> "VIII";
             case 9 -> "IX";
             case 10 -> "X";
-            default -> Integer.toString(number);
+            default -> ENCHANTMENT_LEVEL_TRANSLATION.formatted(number); // Fallback to translation to match vanilla style
         };
     }
 }

common/src/main/java/com/viaversion/viabackwards/api/rewriters/EntityRewriter.java

@@ -25,7 +25,6 @@ import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandler;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
-import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.api.type.types.version.Types1_14;
 
@@ -105,14 +104,11 @@ public abstract class EntityRewriter<C extends ClientboundPacketType, T extends
     }
 
     public void registerSpawnTracker(C packetType) {
-        protocol.registerClientbound(packetType, new PacketHandlers() {
-            @Override
-            public void register() {
-                map(Types.VAR_INT); // 0 - Entity ID
-                map(Types.UUID); // 1 - Entity UUID
-                map(Types.VAR_INT); // 2 - Entity Type
-                handler(wrapper -> trackAndMapEntity(wrapper));
-            }
+        protocol.registerClientbound(packetType, wrapper -> {
+            wrapper.passthrough(Types.VAR_INT); // Entity ID
+            wrapper.passthrough(Types.UUID); // Entity UUID
+            wrapper.passthrough(Types.VAR_INT); // Entity Type
+            trackAndMapEntity(wrapper);
         });
     }
 
@@ -127,7 +123,6 @@ public abstract class EntityRewriter<C extends ClientboundPacketType, T extends
             String world = wrapper.get(Types.STRING, 1);
             if (tracker.currentWorld() != null && !tracker.currentWorld().equals(world)) {
                 tracker.clearEntities();
-                tracker.trackClientEntity();
             }
             tracker.setCurrentWorld(world);
         };

common/src/main/java/com/viaversion/viabackwards/api/rewriters/EntityRewriterBase.java

@@ -21,8 +21,9 @@ import com.google.common.base.Preconditions;
 import com.viaversion.viabackwards.ViaBackwards;
 import com.viaversion.viabackwards.api.BackwardsProtocol;
 import com.viaversion.viabackwards.api.entities.storage.EntityReplacement;
-import com.viaversion.viabackwards.api.entities.storage.WrappedMetadata;
+import com.viaversion.viabackwards.api.entities.storage.WrappedEntityData;
 import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.data.entity.EntityTracker;
 import com.viaversion.viaversion.api.data.entity.StoredEntityData;
 import com.viaversion.viaversion.api.data.entity.TrackedEntity;
 import com.viaversion.viaversion.api.minecraft.ClientWorld;
@@ -50,24 +51,24 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  */
 public abstract class EntityRewriterBase<C extends ClientboundPacketType, T extends BackwardsProtocol<C, ?, ?, ?>> extends EntityRewriter<C, T> {
     private final Int2ObjectMap<EntityReplacement> entityDataMappings = new Int2ObjectOpenHashMap<>();
-    private final EntityDataType displayNameMetaType;
-    private final EntityDataType displayVisibilityMetaType;
+    private final EntityDataType displayNameDataType;
+    private final EntityDataType displayVisibilityDataType;
     private final int displayNameIndex;
     private final int displayVisibilityIndex;
 
-    EntityRewriterBase(T protocol, EntityDataType displayNameMetaType, int displayNameIndex,
-                       EntityDataType displayVisibilityMetaType, int displayVisibilityIndex) {
+    EntityRewriterBase(T protocol, EntityDataType displayNameDataType, int displayNameIndex,
+                       EntityDataType displayVisibilityDataType, int displayVisibilityIndex) {
         super(protocol, false);
-        this.displayNameMetaType = displayNameMetaType;
+        this.displayNameDataType = displayNameDataType;
         this.displayNameIndex = displayNameIndex;
-        this.displayVisibilityMetaType = displayVisibilityMetaType;
+        this.displayVisibilityDataType = displayVisibilityDataType;
         this.displayVisibilityIndex = displayVisibilityIndex;
     }
 
     @Override
     public void handleEntityData(int entityId, List<EntityData> entityDataList, UserConnection connection) {
         final TrackedEntity entity = tracker(connection).entity(entityId);
-        final boolean initialMetadata = !(entity != null && entity.hasSentEntityData());
+        final boolean initialEntityData = !(entity != null && entity.hasSentEntityData());
 
         super.handleEntityData(entityId, entityDataList, connection);
 
@@ -80,37 +81,37 @@ public abstract class EntityRewriterBase<C extends ClientboundPacketType, T exte
         final Object displayNameObject;
         if (entityMapping != null && (displayNameObject = entityMapping.entityName()) != null) {
             final EntityData displayName = getData(displayNameIndex, entityDataList);
-            if (initialMetadata) {
+            if (initialEntityData) {
                 if (displayName == null) {
-                    // Add it as new metadata
-                    entityDataList.add(new EntityData(displayNameIndex, displayNameMetaType, displayNameObject));
-                    addDisplayVisibilityMeta(entityDataList);
+                    // Add it as new entity data
+                    entityDataList.add(new EntityData(displayNameIndex, displayNameDataType, displayNameObject));
+                    addDisplayVisibilityData(entityDataList);
                 } else if (displayName.getValue() == null || displayName.getValue().toString().isEmpty()) {
                     // Overwrite the existing null/empty display name
                     displayName.setValue(displayNameObject);
-                    addDisplayVisibilityMeta(entityDataList);
+                    addDisplayVisibilityData(entityDataList);
                 }
             } else if (displayName != null && (displayName.getValue() == null || displayName.getValue().toString().isEmpty())) {
                 // Overwrite null/empty display name
                 displayName.setValue(displayNameObject);
-                addDisplayVisibilityMeta(entityDataList);
+                addDisplayVisibilityData(entityDataList);
             }
         }
 
-        // Add any other extra meta for mapped entities
-        if (entityMapping != null && entityMapping.hasBaseMeta() && initialMetadata) {
-            entityMapping.defaultMeta().createMeta(new WrappedMetadata(entityDataList));
+        // Add any other extra data for mapped entities
+        if (entityMapping != null && entityMapping.hasBaseData() && initialEntityData) {
+            entityMapping.defaultData().createData(new WrappedEntityData(entityDataList));
         }
     }
 
-    private void addDisplayVisibilityMeta(List<EntityData> metadataList) {
+    private void addDisplayVisibilityData(List<EntityData> entityDataList) {
         if (alwaysShowOriginalMobName()) {
-            removeMeta(displayVisibilityIndex, metadataList);
-            metadataList.add(new EntityData(displayVisibilityIndex, displayVisibilityMetaType, getDisplayVisibilityMetaValue()));
+            removeData(displayVisibilityIndex, entityDataList);
+            entityDataList.add(new EntityData(displayVisibilityIndex, displayVisibilityDataType, getDisplayVisibilityDataValue()));
         }
     }
 
-    protected Object getDisplayVisibilityMetaValue() {
+    protected Object getDisplayVisibilityDataValue() {
         return true;
     }
 
@@ -118,17 +119,17 @@ public abstract class EntityRewriterBase<C extends ClientboundPacketType, T exte
         return ViaBackwards.getConfig().alwaysShowOriginalMobName();
     }
 
-    protected @Nullable EntityData getData(int metaIndex, List<EntityData> metadataList) {
-        for (EntityData metadata : metadataList) {
-            if (metadata.id() == metaIndex) {
-                return metadata;
+    protected @Nullable EntityData getData(int dataIndex, List<EntityData> entityDataList) {
+        for (EntityData entityData : entityDataList) {
+            if (entityData.id() == dataIndex) {
+                return entityData;
             }
         }
         return null;
     }
 
-    protected void removeMeta(int metaIndex, List<EntityData> metadataList) {
-        metadataList.removeIf(meta -> meta.id() == metaIndex);
+    protected void removeData(int dataIndex, List<EntityData> entityDataList) {
+        entityDataList.removeIf(data -> data.id() == dataIndex);
     }
 
     protected boolean hasData(EntityType type) {
@@ -163,7 +164,7 @@ public abstract class EntityRewriterBase<C extends ClientboundPacketType, T exte
         return data;
     }
 
-    public void registerMetaTypeHandler(
+    public void registerEntityDataTypeHandler(
         @Nullable EntityDataType itemType,
         @Nullable EntityDataType blockStateType,
         @Nullable EntityDataType optionalBlockStateType,
@@ -171,28 +172,28 @@ public abstract class EntityRewriterBase<C extends ClientboundPacketType, T exte
         @Nullable EntityDataType componentType,
         @Nullable EntityDataType optionalComponentType
     ) {
-        filter().handler((event, meta) -> {
-            EntityDataType type = meta.dataType();
+        filter().handler((event, data) -> {
+            EntityDataType type = data.dataType();
             if (type == itemType) {
-                protocol.getItemRewriter().handleItemToClient(event.user(), meta.value());
+                protocol.getItemRewriter().handleItemToClient(event.user(), data.value());
             } else if (type == blockStateType) {
-                int data = meta.value();
-                meta.setValue(protocol.getMappingData().getNewBlockStateId(data));
+                int value = data.value();
+                data.setValue(protocol.getMappingData().getNewBlockStateId(value));
             } else if (type == optionalBlockStateType) {
-                int data = meta.value();
-                if (data != 0) {
-                    meta.setValue(protocol.getMappingData().getNewBlockStateId(data));
+                int value = data.value();
+                if (value != 0) {
+                    data.setValue(protocol.getMappingData().getNewBlockStateId(value));
                 }
             } else if (type == particleType) {
-                rewriteParticle(event.user(), meta.value());
+                protocol.getParticleRewriter().rewriteParticle(event.user(), data.value());
             } else if (type == optionalComponentType || type == componentType) {
-                JsonElement text = meta.value();
+                JsonElement text = data.value();
                 protocol.getComponentRewriter().processText(event.user(), text);
             }
         });
     }
 
-    public void registerMetaTypeHandler1_20_3(
+    public void registerEntityDataTypeHandler1_20_3(
         @Nullable EntityDataType itemType,
         @Nullable EntityDataType blockStateType,
         @Nullable EntityDataType optionalBlockStateType,
@@ -201,27 +202,27 @@ public abstract class EntityRewriterBase<C extends ClientboundPacketType, T exte
         @Nullable EntityDataType componentType,
         @Nullable EntityDataType optionalComponentType
     ) {
-        filter().handler((event, meta) -> {
-            EntityDataType type = meta.dataType();
+        filter().handler((event, data) -> {
+            EntityDataType type = data.dataType();
             if (type == itemType) {
-                meta.setValue(protocol.getItemRewriter().handleItemToClient(event.user(), meta.value()));
+                data.setValue(protocol.getItemRewriter().handleItemToClient(event.user(), data.value()));
             } else if (type == blockStateType) {
-                int data = meta.value();
-                meta.setValue(protocol.getMappingData().getNewBlockStateId(data));
+                int value = data.value();
+                data.setValue(protocol.getMappingData().getNewBlockStateId(value));
             } else if (type == optionalBlockStateType) {
-                int data = meta.value();
-                if (data != 0) {
-                    meta.setValue(protocol.getMappingData().getNewBlockStateId(data));
+                int value = data.value();
+                if (value != 0) {
+                    data.setValue(protocol.getMappingData().getNewBlockStateId(value));
                 }
             } else if (type == particleType) {
-                rewriteParticle(event.user(), meta.value());
+                protocol.getParticleRewriter().rewriteParticle(event.user(), data.value());
             } else if (type == particlesType) {
-                Particle[] particles = meta.value();
+                Particle[] particles = data.value();
                 for (final Particle particle : particles) {
-                    rewriteParticle(event.user(), particle);
+                    protocol.getParticleRewriter().rewriteParticle(event.user(), particle);
                 }
             } else if (type == optionalComponentType || type == componentType) {
-                protocol.getComponentRewriter().processTag(event.user(), meta.value());
+                protocol.getComponentRewriter().processTag(event.user(), data.value());
             }
         });
     }
@@ -238,15 +239,27 @@ public abstract class EntityRewriterBase<C extends ClientboundPacketType, T exte
         return getTrackerHandler(Types.VAR_INT, 1);
     }
 
-    protected PacketHandler getTrackerHandler(EntityType entityType, Type<? extends Number> intType) {
-        return wrapper -> tracker(wrapper.user()).addEntity((int) wrapper.get(intType, 0), entityType);
+    protected PacketHandler getTrackerHandler(EntityType entityType) {
+        return wrapper -> tracker(wrapper.user()).addEntity(wrapper.get(Types.VAR_INT, 0), entityType);
+    }
+
+    protected PacketHandler getPlayerTrackerHandler() {
+        return wrapper -> {
+            final int entityId = wrapper.get(Types.INT, 0);
+
+            final EntityTracker tracker = tracker(wrapper.user());
+            tracker(wrapper.user()).setClientEntityId(entityId);
+            tracker.addEntity(entityId, tracker.playerType());
+        };
     }
 
     protected PacketHandler getDimensionHandler(int index) {
         return wrapper -> {
-            ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
+            ClientWorld clientWorld = wrapper.user().getClientWorld(this.protocol.getClass());
             int dimensionId = wrapper.get(Types.INT, index);
-            clientWorld.setEnvironment(dimensionId);
+            if (clientWorld.setEnvironment(dimensionId)) {
+                tracker(wrapper.user()).clearEntities();
+            }
         };
     }
 }

common/src/main/java/com/viaversion/viabackwards/api/rewriters/LegacyBlockItemRewriter.java

@@ -51,7 +51,6 @@ import com.viaversion.nbt.tag.Tag;
 import com.viaversion.viaversion.util.ComponentUtil;
 import java.util.HashMap;
 import java.util.Map;
-import java.util.Optional;
 import com.viaversion.viaversion.util.IdAndData;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
@@ -104,9 +103,9 @@ public abstract class LegacyBlockItemRewriter<C extends ClientboundPacketType, S
                 // Include data
                 short unmappedData = Short.parseShort(key.substring(dataSeparatorIndex + 1));
                 unmappedId = Integer.parseInt(key.substring(0, dataSeparatorIndex));
-                unmappedId = IdAndData.toRawData(unmappedId, unmappedData);
+                unmappedId = compress(unmappedId, unmappedData);
             } else {
-                unmappedId = IdAndData.toRawData(Integer.parseInt(key), -1);
+                unmappedId = compress(Integer.parseInt(key), -1);
             }
 
             mappings.put(unmappedId, new MappedLegacyBlockItem(id, data, name, type));
@@ -121,12 +120,12 @@ public abstract class LegacyBlockItemRewriter<C extends ClientboundPacketType, S
         // Special block color handling
         if (name != null && name.contains("%color%")) {
             for (int i = from; i <= to; i++) {
-                mappings.put(IdAndData.toRawData(i, -1), new MappedLegacyBlockItem(id, data, name.replace("%color%", BlockColors1_11_1.get(i - from)), type));
+                mappings.put(compress(i, -1), new MappedLegacyBlockItem(id, data, name.replace("%color%", BlockColors1_11_1.get(i - from)), type));
             }
         } else {
             MappedLegacyBlockItem mappedBlockItem = new MappedLegacyBlockItem(id, data, name, type);
             for (int i = from; i <= to; i++) {
-                mappings.put(IdAndData.toRawData(i, -1), mappedBlockItem);
+                mappings.put(compress(i, -1), mappedBlockItem);
             }
         }
     }
@@ -289,7 +288,7 @@ public abstract class LegacyBlockItemRewriter<C extends ClientboundPacketType, S
 
             MappedLegacyBlockItem settings = getMappedBlock(block);
             if (settings != null && settings.hasBlockEntityHandler()) {
-                settings.getBlockEntityHandler().handleOrNewCompoundTag(block, tag);
+                settings.getBlockEntityHandler().handleCompoundTag(block, tag);
             }
         }
 
@@ -343,7 +342,7 @@ public abstract class LegacyBlockItemRewriter<C extends ClientboundPacketType, S
                         tag.putInt("y", y + (i << 4));
                         tag.putInt("z", z + (chunk.getZ() << 4));
 
-                        settings.getBlockEntityHandler().handleOrNewCompoundTag(block, tag);
+                        settings.getBlockEntityHandler().handleCompoundTag(block, tag);
                         chunk.getBlockEntities().add(tag);
                     }
                 }
@@ -361,13 +360,13 @@ public abstract class LegacyBlockItemRewriter<C extends ClientboundPacketType, S
     }
 
     private @Nullable MappedLegacyBlockItem getMappedBlock(int id, int data) {
-        MappedLegacyBlockItem mapping = blockReplacements.get(IdAndData.toRawData(id, data));
-        return mapping != null ? mapping : blockReplacements.get(IdAndData.toRawData(id, -1));
+        MappedLegacyBlockItem mapping = blockReplacements.get(compress(id, data));
+        return mapping != null ? mapping : blockReplacements.get(compress(id, -1));
     }
 
     private @Nullable MappedLegacyBlockItem getMappedItem(int id, int data) {
-        MappedLegacyBlockItem mapping = itemReplacements.get(IdAndData.toRawData(id, data));
-        return mapping != null ? mapping : itemReplacements.get(IdAndData.toRawData(id, -1));
+        MappedLegacyBlockItem mapping = itemReplacements.get(compress(id, data));
+        return mapping != null ? mapping : itemReplacements.get(compress(id, -1));
     }
 
     private @Nullable MappedLegacyBlockItem getMappedBlock(int rawId) {
@@ -380,6 +379,11 @@ public abstract class LegacyBlockItemRewriter<C extends ClientboundPacketType, S
         return BackwardsMappingDataLoader.INSTANCE.loadFromDataDir(name);
     }
 
+    protected int compress(final int id, final int data) {
+        // Using IdAndData for the internal storage can cause id overlaps in edge cases and would lead to wrong data
+        return (id << 16) | (data & 0xFFFF);
+    }
+
     private record Pos(int x, short y, int z) {
 
         public Pos(int x, int y, int z) {

common/src/main/java/com/viaversion/viabackwards/api/rewriters/LegacyEntityRewriter.java

@@ -18,9 +18,9 @@
 package com.viaversion.viabackwards.api.rewriters;
 
 import com.viaversion.viabackwards.api.BackwardsProtocol;
-import com.viaversion.viabackwards.api.entities.storage.EntityReplacement;
 import com.viaversion.viabackwards.api.entities.storage.EntityObjectData;
-import com.viaversion.viabackwards.api.entities.storage.WrappedMetadata;
+import com.viaversion.viabackwards.api.entities.storage.EntityReplacement;
+import com.viaversion.viabackwards.api.entities.storage.WrappedEntityData;
 import com.viaversion.viaversion.api.minecraft.ClientWorld;
 import com.viaversion.viaversion.api.minecraft.entities.EntityType;
 import com.viaversion.viaversion.api.minecraft.entities.ObjectType;
@@ -66,8 +66,10 @@ public abstract class LegacyEntityRewriter<C extends ClientboundPacketType, T ex
             public void register() {
                 map(Types.INT);
                 handler(wrapper -> {
-                    ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
-                    clientWorld.setEnvironment(wrapper.get(Types.INT, 0));
+                    ClientWorld clientWorld = wrapper.user().getClientWorld(protocol.getClass());
+                    if (clientWorld.setEnvironment(wrapper.get(Types.INT, 0))) {
+                        tracker(wrapper.user()).clearEntities();
+                    }
                 });
             }
         });
@@ -81,73 +83,52 @@ public abstract class LegacyEntityRewriter<C extends ClientboundPacketType, T ex
                 map(Types.UNSIGNED_BYTE); // 1 - Gamemode
                 map(Types.INT); // 2 - Dimension
                 handler(wrapper -> {
-                    ClientWorld clientChunks = wrapper.user().get(ClientWorld.class);
-                    clientChunks.setEnvironment(wrapper.get(Types.INT, 1));
-                    addTrackedEntity(wrapper, wrapper.get(Types.INT, 0), playerType);
+                    ClientWorld clientWorld = wrapper.user().getClientWorld(protocol.getClass());
+                    clientWorld.setEnvironment(wrapper.get(Types.INT, 1));
+
+                    final int entityId = wrapper.get(Types.INT, 0);
+                    addTrackedEntity(wrapper, entityId, playerType);
+                    tracker(wrapper.user()).setClientEntityId(entityId);
                 });
             }
         });
     }
 
-    @Override
-    public void registerSetEntityData(C packetType, Type<List<EntityData>> oldMetaType, Type<List<EntityData>> newMetaType) {
-        protocol.registerClientbound(packetType, new PacketHandlers() {
-            @Override
-            public void register() {
-                map(Types.VAR_INT); // 0 - Entity ID
-                if (oldMetaType != null) {
-                    map(oldMetaType, newMetaType);
-                } else {
-                    map(newMetaType);
-                }
-                handler(wrapper -> {
-                    List<EntityData> metadata = wrapper.get(newMetaType, 0);
-                    handleEntityData(wrapper.get(Types.VAR_INT, 0), metadata, wrapper.user());
-                });
-            }
-        });
-    }
-
-    @Override
-    public void registerSetEntityData(C packetType, Type<List<EntityData>> metaType) {
-        registerSetEntityData(packetType, null, metaType);
-    }
-
-    protected PacketHandler getMobSpawnRewriter(Type<List<EntityData>> metaType, IdSetter idSetter) {
+    protected PacketHandler getMobSpawnRewriter(Type<List<EntityData>> dataType, IdSetter idSetter) {
         return wrapper -> {
             int entityId = wrapper.get(Types.VAR_INT, 0);
             EntityType type = tracker(wrapper.user()).entityType(entityId);
 
-            List<EntityData> metadata = wrapper.get(metaType, 0);
-            handleEntityData(entityId, metadata, wrapper.user());
+            List<EntityData> entityDataList = wrapper.get(dataType, 0);
+            handleEntityData(entityId, entityDataList, wrapper.user());
 
             EntityReplacement entityReplacement = entityDataForType(type);
             if (entityReplacement != null) {
                 idSetter.setId(wrapper, entityReplacement.replacementId());
-                if (entityReplacement.hasBaseMeta()) {
-                    entityReplacement.defaultMeta().createMeta(new WrappedMetadata(metadata));
+                if (entityReplacement.hasBaseData()) {
+                    entityReplacement.defaultData().createData(new WrappedEntityData(entityDataList));
                 }
             }
         };
     }
 
-    public PacketHandler getMobSpawnRewriter(Type<List<EntityData>> metaType) {
-        return getMobSpawnRewriter(metaType, (wrapper, id) -> wrapper.set(Types.UNSIGNED_BYTE, 0, (short) id));
+    public PacketHandler getMobSpawnRewriter(Type<List<EntityData>> dataType) {
+        return getMobSpawnRewriter(dataType, (wrapper, id) -> wrapper.set(Types.UNSIGNED_BYTE, 0, (short) id));
     }
 
-    public PacketHandler getMobSpawnRewriter1_11(Type<List<EntityData>> metaType) {
-        return getMobSpawnRewriter(metaType, (wrapper, id) -> wrapper.set(Types.VAR_INT, 1, id));
+    public PacketHandler getMobSpawnRewriter1_11(Type<List<EntityData>> dataType) {
+        return getMobSpawnRewriter(dataType, (wrapper, id) -> wrapper.set(Types.VAR_INT, 1, id));
     }
 
     protected PacketHandler getObjectTrackerHandler() {
         return wrapper -> addTrackedEntity(wrapper, wrapper.get(Types.VAR_INT, 0), objectTypeFromId(wrapper.get(Types.BYTE, 0)));
     }
 
-    protected PacketHandler getTrackerAndMetaHandler(Type<List<EntityData>> metaType, EntityType entityType) {
+    protected PacketHandler getTrackerAndDataHandler(Type<List<EntityData>> dataType, EntityType entityType) {
         return wrapper -> {
             addTrackedEntity(wrapper, wrapper.get(Types.VAR_INT, 0), entityType);
-            List<EntityData> metadata = wrapper.get(metaType, 0);
-            handleEntityData(wrapper.get(Types.VAR_INT, 0), metadata, wrapper.user());
+            List<EntityData> entityDataList = wrapper.get(dataType, 0);
+            handleEntityData(wrapper.get(Types.VAR_INT, 0), entityDataList, wrapper.user());
         };
     }
 
@@ -155,7 +136,7 @@ public abstract class LegacyEntityRewriter<C extends ClientboundPacketType, T ex
         return wrapper -> {
             ObjectType type = objectGetter.apply(wrapper.get(Types.BYTE, 0));
             if (type == null) {
-                protocol.getLogger().warning("Could not find Entity Type" + wrapper.get(Types.BYTE, 0));
+                protocol.getLogger().warning("Could not find entity type " + wrapper.get(Types.BYTE, 0));
                 return;
             }
 

common/src/main/java/com/viaversion/viabackwards/api/rewriters/SoundRewriter.java

@@ -23,7 +23,6 @@ import com.viaversion.viaversion.api.minecraft.SoundEvent;
 import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandler;
-import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
 import com.viaversion.viaversion.api.type.Types;
 
 public class SoundRewriter<C extends ClientboundPacketType> extends com.viaversion.viaversion.rewriter.SoundRewriter<C> {
@@ -36,22 +35,14 @@ public class SoundRewriter<C extends ClientboundPacketType> extends com.viaversi
     }
 
     public void registerNamedSound(final C packetType) {
-        protocol.registerClientbound(packetType, new PacketHandlers() {
-            @Override
-            public void register() {
-                map(Types.STRING); // Sound identifier
-                handler(getNamedSoundHandler());
-            }
+        protocol.registerClientbound(packetType, wrapper -> {
+            wrapper.passthrough(Types.STRING); // Sound identifier
+            getNamedSoundHandler().handle(wrapper);
         });
     }
 
     public void registerStopSound(final C packetType) {
-        protocol.registerClientbound(packetType, new PacketHandlers() {
-            @Override
-            public void register() {
-                handler(getStopSoundHandler());
-            }
-        });
+        protocol.registerClientbound(packetType, wrapper -> getStopSoundHandler().handle(wrapper));
     }
 
     public PacketHandler getNamedSoundHandler() {

common/src/main/java/com/viaversion/viabackwards/api/rewriters/StructuredEnchantmentRewriter.java

@@ -23,14 +23,13 @@ import com.viaversion.nbt.tag.ListTag;
 import com.viaversion.nbt.tag.NumberTag;
 import com.viaversion.nbt.tag.Tag;
 import com.viaversion.viabackwards.api.data.BackwardsMappingData;
+import com.viaversion.viabackwards.utils.ChatUtil;
 import com.viaversion.viaversion.api.data.Mappings;
-import com.viaversion.viaversion.api.minecraft.data.StructuredData;
 import com.viaversion.viaversion.api.minecraft.data.StructuredDataContainer;
 import com.viaversion.viaversion.api.minecraft.data.StructuredDataKey;
 import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.minecraft.item.data.Enchantments;
 import com.viaversion.viaversion.libs.fastutil.ints.Int2IntMap;
-import com.viaversion.viaversion.libs.fastutil.ints.IntIntPair;
 import com.viaversion.viaversion.libs.fastutil.objects.ObjectIterator;
 import com.viaversion.viaversion.rewriter.IdRewriteFunction;
 import com.viaversion.viaversion.util.ComponentUtil;
@@ -38,6 +37,8 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 
+import static com.viaversion.viabackwards.api.rewriters.EnchantmentRewriter.ENCHANTMENT_LEVEL_TRANSLATION;
+
 public class StructuredEnchantmentRewriter {
 
     protected final BackwardsStructuredItemRewriter<?, ?, ?> itemRewriter;
@@ -56,7 +57,7 @@ public class StructuredEnchantmentRewriter {
         };
         final DescriptionSupplier descriptionSupplier = (id, level) -> {
             final String remappedName = mappingData.mappedEnchantmentName(id);
-            return ComponentUtil.jsonStringToTag(ComponentUtil.legacyToJsonString("§7" + remappedName + " " + EnchantmentRewriter.getRomanNumber(level), true));
+            return ComponentUtil.jsonStringToTag(ChatUtil.legacyToJsonString("§7" + remappedName, ENCHANTMENT_LEVEL_TRANSLATION.formatted(level), true));
         };
         rewriteEnchantmentsToClient(data, StructuredDataKey.ENCHANTMENTS, idRewriteFunction, descriptionSupplier, false);
         rewriteEnchantmentsToClient(data, StructuredDataKey.STORED_ENCHANTMENTS, idRewriteFunction, descriptionSupplier, true);
@@ -64,91 +65,102 @@ public class StructuredEnchantmentRewriter {
 
     public void handleToServer(final Item item) {
         final StructuredDataContainer data = item.dataContainer();
-        final StructuredData<CompoundTag> customData = data.getNonEmpty(StructuredDataKey.CUSTOM_DATA);
-        if (customData == null) {
-            return;
+        final CompoundTag customData = data.get(StructuredDataKey.CUSTOM_DATA);
+        if (customData != null) {
+            rewriteEnchantmentsToServer(data, customData, StructuredDataKey.ENCHANTMENTS);
+            rewriteEnchantmentsToServer(data, customData, StructuredDataKey.STORED_ENCHANTMENTS);
         }
-
-        final CompoundTag tag = customData.value();
-        rewriteEnchantmentsToServer(data, tag, StructuredDataKey.ENCHANTMENTS);
-        rewriteEnchantmentsToServer(data, tag, StructuredDataKey.STORED_ENCHANTMENTS);
     }
 
     public void rewriteEnchantmentsToClient(final StructuredDataContainer data, final StructuredDataKey<Enchantments> key, final IdRewriteFunction rewriteFunction, final DescriptionSupplier descriptionSupplier, final boolean storedEnchant) {
-        final StructuredData<Enchantments> enchantmentsData = data.getNonEmpty(key);
-        if (enchantmentsData == null) {
+        final Enchantments enchantments = data.get(key);
+        if (enchantments == null || enchantments.size() == 0) {
             return;
         }
 
-        final CompoundTag tag = data.computeIfAbsent(StructuredDataKey.CUSTOM_DATA, $ -> new CompoundTag()).value();
-        final Enchantments enchantments = enchantmentsData.value();
         final List<Tag> loreToAdd = new ArrayList<>();
-        boolean changed = false;
+        boolean removedEnchantments = false;
+        boolean updatedLore = false;
 
         final ObjectIterator<Int2IntMap.Entry> iterator = enchantments.enchantments().int2IntEntrySet().iterator();
-        final List<IntIntPair> updatedIds = new ArrayList<>();
+        final List<PendingIdChange> updatedIds = new ArrayList<>();
         while (iterator.hasNext()) {
             final Int2IntMap.Entry entry = iterator.next();
             final int id = entry.getIntKey();
             final int mappedId = rewriteFunction.rewrite(id);
+            final int level = entry.getIntValue();
             if (mappedId != -1) {
                 if (rewriteIds) {
                     // Update the map after to iteration to preserve the current ids before possibly saving the original, avoid CME
-                    updatedIds.add(IntIntPair.of(id, mappedId));
+                    updatedIds.add(new PendingIdChange(id, mappedId, level));
                 }
                 continue;
             }
 
-            final int level = entry.getIntValue();
+            if (!removedEnchantments) {
+                // Backup original before doing modifications
+                final CompoundTag customData = customData(data);
+                itemRewriter.saveListTag(customData, asTag(enchantments), key.identifier());
+                removedEnchantments = true;
+            }
+
             final Tag description = descriptionSupplier.get(id, level);
-            if (description != null) {
-                if (!changed) {
-                    // Backup original before doing modifications
-                    itemRewriter.saveListTag(tag, asTag(enchantments), key.identifier());
-                    changed = true;
-                }
-
+            if (description != null && enchantments.showInTooltip()) {
                 loreToAdd.add(description);
-                iterator.remove();
+                updatedLore = true;
+            }
+
+            iterator.remove();
+        }
+
+        // Remove all first, then add the new ones
+        for (final PendingIdChange change : updatedIds) {
+            enchantments.remove(change.id());
+        }
+        for (final PendingIdChange change : updatedIds) {
+            enchantments.add(change.mappedId(), change.level());
+        }
+
+        if (removedEnchantments) {
+            final CompoundTag tag = customData(data);
+            if (!storedEnchant && enchantments.size() == 0) {
+                // Add glint override if there are no enchantments left
+                final Boolean glintOverride = data.get(StructuredDataKey.ENCHANTMENT_GLINT_OVERRIDE);
+                if (glintOverride != null) {
+                    tag.putBoolean(itemRewriter.nbtTagName("glint"), glintOverride);
+                } else {
+                    tag.putBoolean(itemRewriter.nbtTagName("noglint"), true);
+                }
+                data.set(StructuredDataKey.ENCHANTMENT_GLINT_OVERRIDE, true);
+            }
+
+            if (enchantments.showInTooltip()) {
+                tag.putBoolean(itemRewriter.nbtTagName("show_" + key.identifier()), true);
             }
         }
 
-        for (final IntIntPair pair : updatedIds) {
-            final int level = enchantments.enchantments().remove(pair.firstInt());
-            enchantments.add(pair.secondInt(), level);
-        }
-
-        if (loreToAdd.isEmpty()) {
-            // No removed enchantments
-            return;
-        }
-
-        // Add glint override if there are no enchantments left
-        if (!storedEnchant && enchantments.size() == 0) {
-            final StructuredData<Boolean> glintOverride = data.getNonEmpty(StructuredDataKey.ENCHANTMENT_GLINT_OVERRIDE);
-            if (glintOverride != null) {
-                tag.putBoolean(itemRewriter.nbtTagName("glint"), glintOverride.value());
+        if (updatedLore) {
+            // Save original lore
+            final CompoundTag tag = customData(data);
+            final Tag[] lore = data.get(StructuredDataKey.LORE);
+            if (lore != null) {
+                final List<Tag> loreList = Arrays.asList(lore);
+                itemRewriter.saveGenericTagList(tag, loreList, "lore");
+                loreToAdd.addAll(loreList);
             } else {
-                tag.putBoolean(itemRewriter.nbtTagName("noglint"), true);
+                tag.putBoolean(itemRewriter.nbtTagName("nolore"), true);
             }
-            data.set(StructuredDataKey.ENCHANTMENT_GLINT_OVERRIDE, true);
+            data.set(StructuredDataKey.LORE, loreToAdd.toArray(new Tag[0]));
         }
+    }
 
-        // Save original lore
-        final StructuredData<Tag[]> loreData = data.getNonEmpty(StructuredDataKey.LORE);
-        if (loreData != null) {
-            final List<Tag> loreList = Arrays.asList(loreData.value());
-            itemRewriter.saveGenericTagList(tag, loreList, "lore");
-            loreToAdd.addAll(loreList);
-        } else {
-            tag.putBoolean(itemRewriter.nbtTagName("nolore"), true);
+    private CompoundTag customData(final StructuredDataContainer data) {
+        CompoundTag tag = data.get(StructuredDataKey.CUSTOM_DATA);
+        if (tag == null) {
+            tag = new CompoundTag();
+            data.set(StructuredDataKey.CUSTOM_DATA, tag);
         }
-
-        if (enchantments.showInTooltip()) {
-            tag.putBoolean(itemRewriter.nbtTagName("show_" + key.identifier()), true);
-        }
-
-        data.set(StructuredDataKey.LORE, loreToAdd.toArray(new Tag[0]));
+        return tag;
     }
 
     private ListTag<CompoundTag> asTag(final Enchantments enchantments) {
@@ -198,4 +210,7 @@ public class StructuredEnchantmentRewriter {
 
         Tag get(int id, int level);
     }
+
+    private record PendingIdChange(int id, int mappedId, int level) {
+    }
 }

common/src/main/java/com/viaversion/viabackwards/api/rewriters/TranslatableRewriter.java

@@ -19,6 +19,7 @@ package com.viaversion.viabackwards.api.rewriters;
 
 import com.viaversion.nbt.tag.CompoundTag;
 import com.viaversion.nbt.tag.StringTag;
+import com.viaversion.viabackwards.ViaBackwards;
 import com.viaversion.viabackwards.api.BackwardsProtocol;
 import com.viaversion.viabackwards.api.data.BackwardsMappingDataLoader;
 import com.viaversion.viaversion.api.connection.UserConnection;
@@ -60,7 +61,7 @@ public class TranslatableRewriter<C extends ClientboundPacketType> extends Compo
         super(protocol, type);
         final Map<String, String> translatableMappings = getTranslatableMappings(version);
         if (translatableMappings == null) {
-            protocol.getLogger().warning("Missing " + version + " translatables!");
+            ViaBackwards.getPlatform().getLogger().warning("Missing " + version + " translatables!");
             this.translatables = new HashMap<>();
         } else {
             this.translatables = translatableMappings;
@@ -87,7 +88,7 @@ public class TranslatableRewriter<C extends ClientboundPacketType> extends Compo
         return translatables.get(translationKey);
     }
 
-    public Map<String, String> getTranslatableMappings(final String sectionIdentifier) {
+    public static Map<String, String> getTranslatableMappings(final String sectionIdentifier) {
         return TRANSLATABLES.get(sectionIdentifier);
     }
 }

common/src/main/java/com/viaversion/viabackwards/protocol/template/BlockItemPacketRewriter1_99.java

@@ -0,0 +1,71 @@
+/*
+ * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards
+ * 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.viabackwards.protocol.template;
+
+import com.viaversion.viabackwards.api.rewriters.BackwardsStructuredItemRewriter;
+import com.viaversion.viaversion.api.type.types.chunk.ChunkType1_20_2;
+import com.viaversion.viaversion.api.type.types.version.Types1_21_4;
+import com.viaversion.viaversion.protocols.v1_21_2to1_21_4.packet.ServerboundPacket1_21_4;
+import com.viaversion.viaversion.protocols.v1_21_2to1_21_4.packet.ServerboundPackets1_21_4;
+import com.viaversion.viaversion.protocols.v1_21to1_21_2.packet.ClientboundPacket1_21_2;
+import com.viaversion.viaversion.protocols.v1_21to1_21_2.packet.ClientboundPackets1_21_2;
+import com.viaversion.viaversion.rewriter.BlockRewriter;
+import com.viaversion.viaversion.rewriter.RecipeDisplayRewriter;
+
+// To replace if needed:
+//   ChunkType1_20_2
+//   RecipeDisplayRewriter
+//   Types1_21_4
+final class BlockItemPacketRewriter1_99 extends BackwardsStructuredItemRewriter<ClientboundPacket1_21_2, ServerboundPacket1_21_4, Protocol1_98To1_99> {
+
+    public BlockItemPacketRewriter1_99(final Protocol1_98To1_99 protocol) {
+        super(protocol, Types1_21_4.ITEM, Types1_21_4.ITEM_ARRAY);
+        /*super(protocol,
+            Types1_21_4.ITEM, Types1_21_4.ITEM_ARRAY, Types1_OLD.ITEM, Types1_OLD.ITEM_ARRAY,
+            Types1_21_4.ITEM_COST, Types1_21_4.OPTIONAL_ITEM_COST, Types1_OLD.ITEM_COST, Types1_OLD.OPTIONAL_ITEM_COST
+        );*/
+    }
+
+    @Override
+    public void registerPackets() {
+        final BlockRewriter<ClientboundPacket1_21_2> blockRewriter = BlockRewriter.for1_20_2(protocol);
+        blockRewriter.registerBlockEvent(ClientboundPackets1_21_2.BLOCK_EVENT);
+        blockRewriter.registerBlockUpdate(ClientboundPackets1_21_2.BLOCK_UPDATE);
+        blockRewriter.registerSectionBlocksUpdate1_20(ClientboundPackets1_21_2.SECTION_BLOCKS_UPDATE);
+        blockRewriter.registerLevelEvent1_21(ClientboundPackets1_21_2.LEVEL_EVENT, 2001);
+        blockRewriter.registerLevelChunk1_19(ClientboundPackets1_21_2.LEVEL_CHUNK_WITH_LIGHT, ChunkType1_20_2::new);
+        blockRewriter.registerBlockEntityData(ClientboundPackets1_21_2.BLOCK_ENTITY_DATA);
+
+        // registerOpenScreen(ClientboundPackets1_21_2.OPEN_SCREEN);
+        protocol.registerClientbound(ClientboundPackets1_21_2.SET_CURSOR_ITEM, this::passthroughClientboundItem);
+        registerSetPlayerInventory(ClientboundPackets1_21_2.SET_PLAYER_INVENTORY);
+        registerCooldown1_21_2(ClientboundPackets1_21_2.COOLDOWN);
+        registerSetContent1_21_2(ClientboundPackets1_21_2.CONTAINER_SET_CONTENT);
+        registerSetSlot1_21_2(ClientboundPackets1_21_2.CONTAINER_SET_SLOT);
+        registerAdvancements1_20_3(ClientboundPackets1_21_2.UPDATE_ADVANCEMENTS);
+        registerSetEquipment(ClientboundPackets1_21_2.SET_EQUIPMENT);
+        registerMerchantOffers1_20_5(ClientboundPackets1_21_2.MERCHANT_OFFERS);
+        registerContainerClick1_21_2(ServerboundPackets1_21_4.CONTAINER_CLICK);
+        registerSetCreativeModeSlot(ServerboundPackets1_21_4.SET_CREATIVE_MODE_SLOT);
+
+        final RecipeDisplayRewriter<ClientboundPacket1_21_2> recipeRewriter = new RecipeDisplayRewriter<>(protocol);
+        recipeRewriter.registerUpdateRecipes(ClientboundPackets1_21_2.UPDATE_RECIPES);
+        recipeRewriter.registerRecipeBookAdd(ClientboundPackets1_21_2.RECIPE_BOOK_ADD);
+        recipeRewriter.registerPlaceGhostRecipe(ClientboundPackets1_21_2.PLACE_GHOST_RECIPE);
+    }
+}

common/src/main/java/com/viaversion/viabackwards/protocol/template/ComponentRewriter1_99.java

@@ -0,0 +1,48 @@
+/*
+ * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards
+ * 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.viabackwards.protocol.template;
+
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.viabackwards.api.BackwardsProtocol;
+import com.viaversion.viabackwards.api.rewriters.TranslatableRewriter;
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.protocols.v1_21to1_21_2.packet.ClientboundPacket1_21_2;
+import com.viaversion.viaversion.util.SerializerVersion;
+
+final class ComponentRewriter1_99 extends TranslatableRewriter<ClientboundPacket1_21_2> {
+
+    public ComponentRewriter1_99(final BackwardsProtocol<ClientboundPacket1_21_2, ?, ?, ?> protocol) {
+        super(protocol, ReadType.NBT);
+    }
+
+    @Override
+    protected void handleShowItem(final UserConnection connection, final CompoundTag itemTag, final CompoundTag componentsTag) {
+        super.handleShowItem(connection, itemTag, componentsTag);
+        if (componentsTag == null) {
+            return;
+        }
+
+        // Remove or update data from componentsTag
+        // New added data which is not handled otherwise needs to be removed to prevent errors on the client
+    }
+
+    @Override
+    protected SerializerVersion inputSerializerVersion() {
+        return SerializerVersion.V1_21_4;
+    }
+}

common/src/main/java/com/viaversion/viabackwards/protocol/template/EntityPacketRewriter1_99.java

@@ -0,0 +1,111 @@
+/*
+ * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards
+ * 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.viabackwards.protocol.template;
+
+import com.viaversion.viabackwards.api.rewriters.EntityRewriter;
+import com.viaversion.viaversion.api.minecraft.entities.EntityType;
+import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_21_4;
+import com.viaversion.viaversion.api.type.Types;
+import com.viaversion.viaversion.api.type.types.version.Types1_21_4;
+import com.viaversion.viaversion.protocols.v1_20_5to1_21.packet.ClientboundConfigurationPackets1_21;
+import com.viaversion.viaversion.protocols.v1_21to1_21_2.packet.ClientboundPacket1_21_2;
+import com.viaversion.viaversion.protocols.v1_21to1_21_2.packet.ClientboundPackets1_21_2;
+import com.viaversion.viaversion.rewriter.RegistryDataRewriter;
+
+// Replace if needed
+//  Types1_OLD
+//  Types1_21_4
+final class EntityPacketRewriter1_99 extends EntityRewriter<ClientboundPacket1_21_2, Protocol1_98To1_99> {
+
+    public EntityPacketRewriter1_99(final Protocol1_98To1_99 protocol) {
+        super(protocol, Types1_21_4.ENTITY_DATA_TYPES.optionalComponentType, Types1_21_4.ENTITY_DATA_TYPES.booleanType);
+    }
+
+    @Override
+    public void registerPackets() {
+        registerTrackerWithData1_19(ClientboundPackets1_21_2.ADD_ENTITY, EntityTypes1_21_4.FALLING_BLOCK);
+        registerSetEntityData(ClientboundPackets1_21_2.SET_ENTITY_DATA, /*Types1_OLD.ENTITY_DATA_LIST, */Types1_21_4.ENTITY_DATA_LIST); // Specify old and new entity data list if changed
+        registerRemoveEntities(ClientboundPackets1_21_2.REMOVE_ENTITIES);
+
+        final RegistryDataRewriter registryDataRewriter = new RegistryDataRewriter(protocol);
+        protocol.registerClientbound(ClientboundConfigurationPackets1_21.REGISTRY_DATA, registryDataRewriter::handle);
+
+        protocol.registerClientbound(ClientboundPackets1_21_2.LOGIN, wrapper -> {
+            final int entityId = wrapper.passthrough(Types.INT); // Entity id
+            wrapper.passthrough(Types.BOOLEAN); // Hardcore
+            wrapper.passthrough(Types.STRING_ARRAY); // World List
+            wrapper.passthrough(Types.VAR_INT); // Max players
+            wrapper.passthrough(Types.VAR_INT); // View distance
+            wrapper.passthrough(Types.VAR_INT); // Simulation distance
+            wrapper.passthrough(Types.BOOLEAN); // Reduced debug info
+            wrapper.passthrough(Types.BOOLEAN); // Show death screen
+            wrapper.passthrough(Types.BOOLEAN); // Limited crafting
+            final int dimensionId = wrapper.passthrough(Types.VAR_INT);
+            final String world = wrapper.passthrough(Types.STRING);
+            trackWorldDataByKey1_20_5(wrapper.user(), dimensionId, world);
+            trackPlayer(wrapper.user(), entityId);
+        });
+
+        protocol.registerClientbound(ClientboundPackets1_21_2.RESPAWN, wrapper -> {
+            final int dimensionId = wrapper.passthrough(Types.VAR_INT);
+            final String world = wrapper.passthrough(Types.STRING);
+            trackWorldDataByKey1_20_5(wrapper.user(), dimensionId, world); // Tracks world height and name for chunk data and entity (un)tracking
+        });
+    }
+
+    @Override
+    protected void registerRewrites() {
+        /*filter().handler((event, data) -> {
+            int id = data.dataType().typeId();
+            if (id >= ac) {
+                return;
+            } else if (id >= ab) {
+                id--;
+            }
+
+            data.setDataType(Types1_21_4.ENTITY_DATA_TYPES.byId(id));
+        });*/
+
+        registerEntityDataTypeHandler1_20_3(
+            Types1_21_4.ENTITY_DATA_TYPES.itemType,
+            Types1_21_4.ENTITY_DATA_TYPES.blockStateType,
+            Types1_21_4.ENTITY_DATA_TYPES.optionalBlockStateType,
+            Types1_21_4.ENTITY_DATA_TYPES.particleType,
+            Types1_21_4.ENTITY_DATA_TYPES.particlesType,
+            Types1_21_4.ENTITY_DATA_TYPES.componentType,
+            Types1_21_4.ENTITY_DATA_TYPES.optionalComponentType
+        );
+        registerBlockStateHandler(EntityTypes1_21_4.ABSTRACT_MINECART, 11);
+
+        // Remove entity data of new entity type
+        // filter().type(EntityTypes1_21_4.SNIFFER).removeIndex(newIndex);
+    }
+
+    @Override
+    public void onMappingDataLoaded() {
+        // If types changed, uncomment to map them
+        // mapTypes();
+
+        // mapEntityTypeWithData(EntityTypes1_21_4.SNIFFER, EntityTypes1_21_4.RAVAGER).tagName();
+    }
+
+    @Override
+    public EntityType typeFromId(final int type) {
+        return EntityTypes1_21_4.getTypeFromId(type);
+    }
+}

common/src/main/java/com/viaversion/viabackwards/protocol/template/Protocol1_98To1_99.java

@@ -15,86 +15,92 @@
  * 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.viabackwards.template.protocol;
+package com.viaversion.viabackwards.protocol.template;
 
 import com.viaversion.viabackwards.api.BackwardsProtocol;
 import com.viaversion.viabackwards.api.data.BackwardsMappingData;
 import com.viaversion.viabackwards.api.rewriters.SoundRewriter;
 import com.viaversion.viabackwards.api.rewriters.TranslatableRewriter;
-import com.viaversion.viabackwards.template.protocol.rewriter.BlockItemPacketRewriter1_99;
-import com.viaversion.viabackwards.template.protocol.rewriter.EntityPacketRewriter1_99;
 import com.viaversion.viaversion.api.connection.UserConnection;
-import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_20_5;
+import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_21_4;
 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.version.Types1_21_4;
 import com.viaversion.viaversion.data.entity.EntityTrackerBase;
-import com.viaversion.viaversion.protocols.v1_20_3to1_20_5.Protocol1_20_3To1_20_5;
-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;
-import com.viaversion.viaversion.protocols.v1_20_3to1_20_5.packet.ClientboundPackets1_20_5;
 import com.viaversion.viaversion.protocols.v1_20_3to1_20_5.packet.ServerboundConfigurationPackets1_20_5;
-import com.viaversion.viaversion.protocols.v1_20_3to1_20_5.packet.ServerboundPacket1_20_5;
-import com.viaversion.viaversion.protocols.v1_20_3to1_20_5.packet.ServerboundPackets1_20_5;
-import com.viaversion.viaversion.rewriter.ComponentRewriter.ReadType;
+import com.viaversion.viaversion.protocols.v1_20_5to1_21.Protocol1_20_5To1_21;
+import com.viaversion.viaversion.protocols.v1_20_5to1_21.packet.ClientboundConfigurationPackets1_21;
+import com.viaversion.viaversion.protocols.v1_21_2to1_21_4.packet.ServerboundPacket1_21_4;
+import com.viaversion.viaversion.protocols.v1_21_2to1_21_4.packet.ServerboundPackets1_21_4;
+import com.viaversion.viaversion.protocols.v1_21to1_21_2.packet.ClientboundPacket1_21_2;
+import com.viaversion.viaversion.protocols.v1_21to1_21_2.packet.ClientboundPackets1_21_2;
+import com.viaversion.viaversion.rewriter.ParticleRewriter;
 import com.viaversion.viaversion.rewriter.StatisticsRewriter;
 import com.viaversion.viaversion.rewriter.TagRewriter;
 
 import static com.viaversion.viaversion.util.ProtocolUtil.packetTypeMap;
 
 // Placeholders to replace (in the entire package):
-//   Protocol1_98To_99, EntityPacketRewriter1_99, BlockItemPacketRewriter1_99
-//   Protocol1_20_5To1_20_3 (the ViaVersion protocol class the mappings depend on)
-//   ClientboundPacket1_20_5
-//   ServerboundPacket1_20_5
-//   ClientboundConfigurationPackets1_20_5
+//   Protocol1_98To1_99, EntityPacketRewriter1_99, BlockItemPacketRewriter1_99
+//   Protocol1_20_5To1_21 (the ViaVersion protocol class the mappings depend on)
+//   ClientboundPacket1_21_2
+//   ServerboundPacket1_21_4
+//   ClientboundConfigurationPackets1_21
 //   ServerboundConfigurationPackets1_20_5
-//   EntityTypes1_20_5 (UNMAPPED type)
+//   EntityTypes1_21_4 (UNMAPPED type)
+//   Types1_21_4.PARTICLE
 //   1.99, 1.98
-public final class Protocol1_98To1_99 extends BackwardsProtocol<ClientboundPacket1_20_5, ClientboundPacket1_20_5, ServerboundPacket1_20_5, ServerboundPacket1_20_5> {
+final class Protocol1_98To1_99 extends BackwardsProtocol<ClientboundPacket1_21_2, ClientboundPacket1_21_2, ServerboundPacket1_21_4, ServerboundPacket1_21_4> {
 
     // ViaBackwards uses its own mappings and also needs a translatablerewriter for translation mappings
-    public static final BackwardsMappingData MAPPINGS = new BackwardsMappingData("1.99", "1.98", Protocol1_20_3To1_20_5.class);
+    public static final BackwardsMappingData MAPPINGS = new BackwardsMappingData("1.99", "1.98", Protocol1_20_5To1_21.class);
     private final EntityPacketRewriter1_99 entityRewriter = new EntityPacketRewriter1_99(this);
     private final BlockItemPacketRewriter1_99 itemRewriter = new BlockItemPacketRewriter1_99(this);
-    private final TranslatableRewriter<ClientboundPacket1_20_5> translatableRewriter = new TranslatableRewriter<>(this, ReadType.NBT);
-    private final TagRewriter<ClientboundPacket1_20_5> tagRewriter = new TagRewriter<>(this);
+    private final ParticleRewriter<ClientboundPacket1_21_2> particleRewriter = new ParticleRewriter<>(this, Types1_21_4.PARTICLE/*, Types1_OLD.PARTICLE*/);
+    private final TranslatableRewriter<ClientboundPacket1_21_2> translatableRewriter = new ComponentRewriter1_99(this);
+    private final TagRewriter<ClientboundPacket1_21_2> tagRewriter = new TagRewriter<>(this);
 
     public Protocol1_98To1_99() {
-        super(ClientboundPacket1_20_5.class, ClientboundPacket1_20_5.class, ServerboundPacket1_20_5.class, ServerboundPacket1_20_5.class);
+        super(ClientboundPacket1_21_2.class, ClientboundPacket1_21_2.class, ServerboundPacket1_21_4.class, ServerboundPacket1_21_4.class);
     }
 
     @Override
     protected void registerPackets() {
         super.registerPackets();
 
-        tagRewriter.registerGeneric(ClientboundPackets1_20_5.UPDATE_TAGS);
-        tagRewriter.registerGeneric(ClientboundConfigurationPackets1_20_5.UPDATE_TAGS);
+        tagRewriter.registerGeneric(ClientboundPackets1_21_2.UPDATE_TAGS);
+        tagRewriter.registerGeneric(ClientboundConfigurationPackets1_21.UPDATE_TAGS);
 
-        final SoundRewriter<ClientboundPacket1_20_5> soundRewriter = new SoundRewriter<>(this);
-        soundRewriter.registerSound1_19_3(ClientboundPackets1_20_5.SOUND);
-        soundRewriter.registerSound1_19_3(ClientboundPackets1_20_5.SOUND_ENTITY);
-        soundRewriter.registerStopSound(ClientboundPackets1_20_5.STOP_SOUND);
+        final SoundRewriter<ClientboundPacket1_21_2> soundRewriter = new SoundRewriter<>(this);
+        soundRewriter.registerSound1_19_3(ClientboundPackets1_21_2.SOUND);
+        soundRewriter.registerSound1_19_3(ClientboundPackets1_21_2.SOUND_ENTITY);
+        soundRewriter.registerStopSound(ClientboundPackets1_21_2.STOP_SOUND);
 
-        new StatisticsRewriter<>(this).register(ClientboundPackets1_20_5.AWARD_STATS);
-        //new AttributeRewriter<>(this).register1_21(ClientboundPackets1_20_5.ENTITY_PROPERTIES);
+        new StatisticsRewriter<>(this).register(ClientboundPackets1_21_2.AWARD_STATS);
+        //new AttributeRewriter<>(this).register1_21(ClientboundPackets1_21_2.UPDATE_ATTRIBUTES);
 
         // Registers translatable mappings (missing a whole bunch still)
-        //translatableRewriter.registerOpenWindow(ClientboundPackets1_20_5.OPEN_WINDOW); // Handled by registerOpenWindow in item rewriters
-        translatableRewriter.registerComponentPacket(ClientboundPackets1_20_5.SET_ACTION_BAR_TEXT);
-        translatableRewriter.registerComponentPacket(ClientboundPackets1_20_5.SET_TITLE_TEXT);
-        translatableRewriter.registerComponentPacket(ClientboundPackets1_20_5.SET_SUBTITLE_TEXT);
-        translatableRewriter.registerBossEvent(ClientboundPackets1_20_5.BOSS_EVENT);
-        translatableRewriter.registerComponentPacket(ClientboundPackets1_20_5.DISCONNECT);
-        translatableRewriter.registerTabList(ClientboundPackets1_20_5.TAB_LIST);
-        translatableRewriter.registerPlayerCombatKill1_20(ClientboundPackets1_20_5.PLAYER_COMBAT_KILL);
-        translatableRewriter.registerComponentPacket(ClientboundPackets1_20_5.SYSTEM_CHAT);
-        translatableRewriter.registerComponentPacket(ClientboundPackets1_20_5.DISGUISED_CHAT);
+        //translatableRewriter.registerOpenScreen(ClientboundPackets1_21_2.OPEN_SCREEN); // Handled by registerOpenScreen in item rewriters
+        translatableRewriter.registerComponentPacket(ClientboundPackets1_21_2.SET_ACTION_BAR_TEXT);
+        translatableRewriter.registerComponentPacket(ClientboundPackets1_21_2.SET_TITLE_TEXT);
+        translatableRewriter.registerComponentPacket(ClientboundPackets1_21_2.SET_SUBTITLE_TEXT);
+        translatableRewriter.registerBossEvent(ClientboundPackets1_21_2.BOSS_EVENT);
+        translatableRewriter.registerComponentPacket(ClientboundPackets1_21_2.DISCONNECT);
+        translatableRewriter.registerTabList(ClientboundPackets1_21_2.TAB_LIST);
+        translatableRewriter.registerPlayerCombatKill1_20(ClientboundPackets1_21_2.PLAYER_COMBAT_KILL);
+        translatableRewriter.registerComponentPacket(ClientboundPackets1_21_2.SYSTEM_CHAT);
+        translatableRewriter.registerComponentPacket(ClientboundPackets1_21_2.DISGUISED_CHAT);
+        translatableRewriter.registerPlayerInfoUpdate1_21_4(ClientboundPackets1_21_2.PLAYER_INFO_UPDATE);
         translatableRewriter.registerPing();
+
+        // If needed for any particle, item, or block changes. Extend ParticleRewriter for particle serializer changes
+        particleRewriter.registerLevelParticles1_20_5(ClientboundPackets1_21_2.LEVEL_PARTICLES);
+        particleRewriter.registerExplode1_21_2(ClientboundPackets1_21_2.EXPLODE);
     }
 
     @Override
     public void init(final UserConnection user) {
-        addEntityTracker(user, new EntityTrackerBase(user, EntityTypes1_20_5.PLAYER));
+        addEntityTracker(user, new EntityTrackerBase(user, EntityTypes1_21_4.PLAYER));
     }
 
     @Override
@@ -113,22 +119,27 @@ public final class Protocol1_98To1_99 extends BackwardsProtocol<ClientboundPacke
     }
 
     @Override
-    public TranslatableRewriter<ClientboundPacket1_20_5> getComponentRewriter() {
+    public ParticleRewriter<ClientboundPacket1_21_2> getParticleRewriter() {
+        return particleRewriter;
+    }
+
+    @Override
+    public TranslatableRewriter<ClientboundPacket1_21_2> getComponentRewriter() {
         return translatableRewriter;
     }
 
     @Override
-    public TagRewriter<ClientboundPacket1_20_5> getTagRewriter() {
+    public TagRewriter<ClientboundPacket1_21_2> getTagRewriter() {
         return tagRewriter;
     }
 
     @Override
-    protected PacketTypesProvider<ClientboundPacket1_20_5, ClientboundPacket1_20_5, ServerboundPacket1_20_5, ServerboundPacket1_20_5> createPacketTypesProvider() {
+    protected PacketTypesProvider<ClientboundPacket1_21_2, ClientboundPacket1_21_2, ServerboundPacket1_21_4, ServerboundPacket1_21_4> 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)
+            packetTypeMap(unmappedClientboundPacketType, ClientboundPackets1_21_2.class, ClientboundConfigurationPackets1_21.class),
+            packetTypeMap(mappedClientboundPacketType, ClientboundPackets1_21_2.class, ClientboundConfigurationPackets1_21.class),
+            packetTypeMap(mappedServerboundPacketType, ServerboundPackets1_21_4.class, ServerboundConfigurationPackets1_20_5.class),
+            packetTypeMap(unmappedServerboundPacketType, ServerboundPackets1_21_4.class, ServerboundConfigurationPackets1_20_5.class)
         );
     }
-}
+}

common/src/main/java/com/viaversion/viabackwards/protocol/v1_10to1_9_3/Protocol1_10To1_9_3.java

@@ -98,11 +98,8 @@ public class Protocol1_10To1_9_3 extends BackwardsProtocol<ClientboundPackets1_9
 
     @Override
     public void init(UserConnection user) {
-        if (!user.has(ClientWorld.class)) {
-            user.put(new ClientWorld());
-        }
-
         user.addEntityTracker(this.getClass(), new EntityTrackerBase(user, EntityTypes1_10.EntityType.PLAYER));
+        user.addClientWorld(this.getClass(), new ClientWorld());
     }
 
     @Override

common/src/main/java/com/viaversion/viabackwards/protocol/v1_10to1_9_3/rewriter/BlockItemPacketRewriter1_10.java

@@ -50,7 +50,7 @@ public class BlockItemPacketRewriter1_10 extends LegacyBlockItemRewriter<Clientb
         registerSetCreativeModeSlot(ServerboundPackets1_9_3.SET_CREATIVE_MODE_SLOT);
 
         protocol.registerClientbound(ClientboundPackets1_9_3.LEVEL_CHUNK, wrapper -> {
-            ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
+            ClientWorld clientWorld = wrapper.user().getClientWorld(Protocol1_10To1_9_3.class);
 
             ChunkType1_9_3 type = ChunkType1_9_3.forEnvironment(clientWorld.getEnvironment());
             Chunk chunk = wrapper.passthrough(type);
@@ -58,10 +58,10 @@ public class BlockItemPacketRewriter1_10 extends LegacyBlockItemRewriter<Clientb
             handleChunk(chunk);
         });
 
-        // Rewrite metadata items
-        protocol.getEntityRewriter().filter().handler((event, meta) -> {
-            if (meta.dataType().type().equals(Types.ITEM1_8)) // Is Item
-                meta.setValue(handleItemToClient(event.user(), (Item) meta.getValue()));
+        // Rewrite entity data items
+        protocol.getEntityRewriter().filter().handler((event, data) -> {
+            if (data.dataType().type().equals(Types.ITEM1_8)) // Is Item
+                data.setValue(handleItemToClient(event.user(), (Item) data.getValue()));
         });
 
         // Particle

common/src/main/java/com/viaversion/viabackwards/protocol/v1_10to1_9_3/rewriter/EntityPacketRewriter1_10.java

@@ -19,7 +19,7 @@
 package com.viaversion.viabackwards.protocol.v1_10to1_9_3.rewriter;
 
 import com.viaversion.viabackwards.api.entities.storage.EntityReplacement;
-import com.viaversion.viabackwards.api.entities.storage.WrappedMetadata;
+import com.viaversion.viabackwards.api.entities.storage.WrappedEntityData;
 import com.viaversion.viabackwards.api.rewriters.LegacyEntityRewriter;
 import com.viaversion.viabackwards.protocol.v1_10to1_9_3.Protocol1_10To1_9_3;
 import com.viaversion.viaversion.api.minecraft.entities.EntityType;
@@ -80,25 +80,25 @@ public class EntityPacketRewriter1_10 extends LegacyEntityRewriter<ClientboundPa
                 map(Types.SHORT); // 9 - Velocity X
                 map(Types.SHORT); // 10 - Velocity Y
                 map(Types.SHORT); // 11 - Velocity Z
-                map(Types1_9.ENTITY_DATA_LIST); // 12 - Metadata
+                map(Types1_9.ENTITY_DATA_LIST); // 12 - Entity data
 
                 // Track entity
                 handler(getTrackerHandler(Types.UNSIGNED_BYTE, 0));
 
-                // Rewrite entity type / metadata
+                // Rewrite entity type / data
                 handler(wrapper -> {
                     int entityId = wrapper.get(Types.VAR_INT, 0);
                     EntityType type = tracker(wrapper.user()).entityType(entityId);
 
-                    List<EntityData> metadata = wrapper.get(Types1_9.ENTITY_DATA_LIST, 0);
-                    handleEntityData(wrapper.get(Types.VAR_INT, 0), metadata, wrapper.user());
+                    List<EntityData> entityDataList = wrapper.get(Types1_9.ENTITY_DATA_LIST, 0);
+                    handleEntityData(wrapper.get(Types.VAR_INT, 0), entityDataList, wrapper.user());
 
                     EntityReplacement entityReplacement = entityDataForType(type);
                     if (entityReplacement != null) {
-                        WrappedMetadata storage = new WrappedMetadata(metadata);
+                        WrappedEntityData storage = new WrappedEntityData(entityDataList);
                         wrapper.set(Types.UNSIGNED_BYTE, 0, (short) entityReplacement.replacementId());
-                        if (entityReplacement.hasBaseMeta())
-                            entityReplacement.defaultMeta().createMeta(storage);
+                        if (entityReplacement.hasBaseData())
+                            entityReplacement.defaultData().createData(storage);
                     }
                 });
 
@@ -119,9 +119,9 @@ public class EntityPacketRewriter1_10 extends LegacyEntityRewriter<ClientboundPa
                 map(Types.DOUBLE); // 4 - Z
                 map(Types.BYTE); // 5 - Yaw
                 map(Types.BYTE); // 6 - Pitch
-                map(Types1_9.ENTITY_DATA_LIST); // 7 - Metadata list
+                map(Types1_9.ENTITY_DATA_LIST); // 7 - Entity data list
 
-                handler(getTrackerAndMetaHandler(Types1_9.ENTITY_DATA_LIST, EntityTypes1_11.EntityType.PLAYER));
+                handler(getTrackerAndDataHandler(Types1_9.ENTITY_DATA_LIST, EntityTypes1_11.EntityType.PLAYER));
             }
         });
 
@@ -134,28 +134,28 @@ public class EntityPacketRewriter1_10 extends LegacyEntityRewriter<ClientboundPa
         mapEntityTypeWithData(EntityTypes1_10.EntityType.POLAR_BEAR, EntityTypes1_10.EntityType.SHEEP).plainName();
 
         // Change the sheep color when the polar bear is standing up (index 13 -> Standing up)
-        filter().type(EntityTypes1_10.EntityType.POLAR_BEAR).index(13).handler((event, meta) -> {
-            boolean b = (boolean) meta.getValue();
+        filter().type(EntityTypes1_10.EntityType.POLAR_BEAR).index(13).handler((event, data) -> {
+            boolean b = (boolean) data.getValue();
 
-            meta.setTypeAndValue(EntityDataTypes1_9.BYTE, b ? (byte) (14 & 0x0F) : (byte) (0));
+            data.setTypeAndValue(EntityDataTypes1_9.BYTE, b ? (byte) (14 & 0x0F) : (byte) (0));
         });
 
 
         // Handle husk (index 13 -> Zombie Type)
-        filter().type(EntityTypes1_10.EntityType.ZOMBIE).index(13).handler((event, meta) -> {
-            if ((int) meta.getValue() == 6) { // Is type Husk
-                meta.setValue(0);
+        filter().type(EntityTypes1_10.EntityType.ZOMBIE).index(13).handler((event, data) -> {
+            if ((int) data.getValue() == 6) { // Is type Husk
+                data.setValue(0);
             }
         });
 
         // Handle Stray (index 12 -> Skeleton Type)
-        filter().type(EntityTypes1_10.EntityType.SKELETON).index(12).handler((event, meta) -> {
-            if ((int) meta.getValue() == 2) {
-                meta.setValue(0); // Change to default skeleton
+        filter().type(EntityTypes1_10.EntityType.SKELETON).index(12).handler((event, data) -> {
+            if ((int) data.getValue() == 2) {
+                data.setValue(0); // Change to default skeleton
             }
         });
 
-        // Handle the missing NoGravity tag for every metadata
+        // Handle the missing NoGravity tag for every entity data
         filter().removeIndex(5);
     }
 

common/src/main/java/com/viaversion/viabackwards/protocol/v1_11_1to1_11/Protocol1_11_1To1_11.java

@@ -39,11 +39,8 @@ public class Protocol1_11_1To1_11 extends BackwardsProtocol<ClientboundPackets1_
 
     @Override
     public void init(UserConnection user) {
-        if (!user.has(ClientWorld.class)) {
-            user.put(new ClientWorld());
-        }
-
         user.addEntityTracker(this.getClass(), new EntityTrackerBase(user, EntityTypes1_11.EntityType.PLAYER));
+        user.addClientWorld(this.getClass(), new ClientWorld());
     }
 
     @Override

common/src/main/java/com/viaversion/viabackwards/protocol/v1_11_1to1_11/rewriter/EntityPacketRewriter1_11_1.java

@@ -23,7 +23,6 @@ import com.viaversion.viabackwards.protocol.v1_11_1to1_11.Protocol1_11_1To1_11;
 import com.viaversion.viaversion.api.minecraft.entities.EntityType;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_11;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
-import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.api.type.types.version.Types1_9;
 import com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ClientboundPackets1_9_3;
@@ -73,12 +72,12 @@ public class EntityPacketRewriter1_11_1 extends LegacyEntityRewriter<Clientbound
                 map(Types.SHORT); // 9 - Velocity X
                 map(Types.SHORT); // 10 - Velocity Y
                 map(Types.SHORT); // 11 - Velocity Z
-                map(Types1_9.ENTITY_DATA_LIST); // 12 - Metadata
+                map(Types1_9.ENTITY_DATA_LIST); // 12 - Entity data
 
                 // Track entity
                 handler(getTrackerHandler());
 
-                // Rewrite entity type / metadata
+                // Rewrite entity type / data
                 handler(getMobSpawnRewriter1_11(Types1_9.ENTITY_DATA_LIST));
             }
         });
@@ -97,9 +96,9 @@ public class EntityPacketRewriter1_11_1 extends LegacyEntityRewriter<Clientbound
                 map(Types.DOUBLE); // 4 - Z
                 map(Types.BYTE); // 5 - Yaw
                 map(Types.BYTE); // 6 - Pitch
-                map(Types1_9.ENTITY_DATA_LIST); // 7 - Metadata list
+                map(Types1_9.ENTITY_DATA_LIST); // 7 - Entity data list
 
-                handler(getTrackerAndMetaHandler(Types1_9.ENTITY_DATA_LIST, EntityTypes1_11.EntityType.PLAYER));
+                handler(getTrackerAndDataHandler(Types1_9.ENTITY_DATA_LIST, EntityTypes1_11.EntityType.PLAYER));
             }
         });
 
@@ -109,10 +108,10 @@ public class EntityPacketRewriter1_11_1 extends LegacyEntityRewriter<Clientbound
 
     @Override
     protected void registerRewrites() {
-        // Handle non-existing firework metadata (index 7 entity id for boosting)
+        // Handle non-existing firework entity data (index 7 entity id for boosting)
         filter().type(EntityTypes1_11.EntityType.FIREWORK_ROCKET).cancel(7);
 
-        // Handle non-existing pig metadata (index 14 - boost time)
+        // Handle non-existing pig entity data (index 14 - boost time)
         filter().type(EntityTypes1_11.EntityType.PIG).cancel(14);
     }
 

common/src/main/java/com/viaversion/viabackwards/protocol/v1_11_1to1_11/rewriter/ItemPacketRewriter1_11_1.java

@@ -47,10 +47,10 @@ public class ItemPacketRewriter1_11_1 extends LegacyBlockItemRewriter<Clientboun
         registerContainerClick(ServerboundPackets1_9_3.CONTAINER_CLICK);
         registerSetCreativeModeSlot(ServerboundPackets1_9_3.SET_CREATIVE_MODE_SLOT);
 
-        // Handle item metadata
-        protocol.getEntityRewriter().filter().handler((event, meta) -> {
-            if (meta.dataType().type().equals(Types.ITEM1_8)) { // Is Item
-                meta.setValue(handleItemToClient(event.user(), (Item) meta.getValue()));
+        // Handle item entity data
+        protocol.getEntityRewriter().filter().handler((event, data) -> {
+            if (data.dataType().type().equals(Types.ITEM1_8)) { // Is Item
+                data.setValue(handleItemToClient(event.user(), (Item) data.getValue()));
             }
         });
     }

common/src/main/java/com/viaversion/viabackwards/protocol/v1_11to1_10/Protocol1_11To1_10.java

@@ -62,11 +62,8 @@ public class Protocol1_11To1_10 extends BackwardsProtocol<ClientboundPackets1_9_
 
     @Override
     public void init(UserConnection user) {
-        if (!user.has(ClientWorld.class)) {
-            user.put(new ClientWorld());
-        }
-
         user.addEntityTracker(this.getClass(), new EntityTrackerBase(user, EntityTypes1_11.EntityType.PLAYER));
+        user.addClientWorld(this.getClass(), new ClientWorld());
 
         if (!user.has(WindowTracker.class)) {
             user.put(new WindowTracker());

common/src/main/java/com/viaversion/viabackwards/protocol/v1_11to1_10/rewriter/BlockItemPacketRewriter1_11.java

@@ -147,7 +147,7 @@ public class BlockItemPacketRewriter1_11 extends LegacyBlockItemRewriter<Clientb
         registerSetCreativeModeSlot(ServerboundPackets1_9_3.SET_CREATIVE_MODE_SLOT);
 
         protocol.registerClientbound(ClientboundPackets1_9_3.LEVEL_CHUNK, wrapper -> {
-            ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
+            ClientWorld clientWorld = wrapper.user().getClientWorld(Protocol1_11To1_10.class);
 
             ChunkType1_9_3 type = ChunkType1_9_3.forEnvironment(clientWorld.getEnvironment()); // Use the 1.10 Chunk type since nothing changed.
             Chunk chunk = wrapper.passthrough(type);
@@ -243,9 +243,9 @@ public class BlockItemPacketRewriter1_11 extends LegacyBlockItemRewriter<Clientb
             }
         });
 
-        protocol.getEntityRewriter().filter().handler((event, meta) -> {
-            if (meta.dataType().type().equals(Types.ITEM1_8)) // Is Item
-                meta.setValue(handleItemToClient(event.user(), (Item) meta.getValue()));
+        protocol.getEntityRewriter().filter().handler((event, data) -> {
+            if (data.dataType().type().equals(Types.ITEM1_8)) // Is Item
+                data.setValue(handleItemToClient(event.user(), (Item) data.getValue()));
         });
     }
 
@@ -253,10 +253,7 @@ public class BlockItemPacketRewriter1_11 extends LegacyBlockItemRewriter<Clientb
     protected void registerRewrites() {
         // Handle spawner block entity (map to itself with custom handler)
         MappedLegacyBlockItem data = itemReplacements.computeIfAbsent(IdAndData.toRawData(52), s -> new MappedLegacyBlockItem(52));
-        data.setBlockEntityHandler((b, tag) -> {
-            EntityMappings1_11.toClientSpawner(tag, true);
-            return tag;
-        });
+        data.setBlockEntityHandler((b, tag) -> EntityMappings1_11.toClientSpawner(tag, true));
 
         enchantmentRewriter = new LegacyEnchantmentRewriter(nbtTagName());
         enchantmentRewriter.registerEnchantment(71, "§cCurse of Vanishing");

common/src/main/java/com/viaversion/viabackwards/protocol/v1_11to1_10/rewriter/EntityPacketRewriter1_11.java

@@ -18,7 +18,7 @@
 
 package com.viaversion.viabackwards.protocol.v1_11to1_10.rewriter;
 
-import com.viaversion.viabackwards.api.entities.storage.WrappedMetadata;
+import com.viaversion.viabackwards.api.entities.storage.WrappedEntityData;
 import com.viaversion.viabackwards.api.rewriters.LegacyEntityRewriter;
 import com.viaversion.viabackwards.protocol.v1_11to1_10.Protocol1_11To1_10;
 import com.viaversion.viabackwards.protocol.v1_11to1_10.data.SplashPotionMappings1_10;
@@ -104,19 +104,19 @@ public class EntityPacketRewriter1_11 extends LegacyEntityRewriter<ClientboundPa
                 map(Types.SHORT); // 9 - Velocity X
                 map(Types.SHORT); // 10 - Velocity Y
                 map(Types.SHORT); // 11 - Velocity Z
-                map(Types1_9.ENTITY_DATA_LIST); // 12 - Metadata
+                map(Types1_9.ENTITY_DATA_LIST); // 12 - Entity data
 
                 // Track entity
                 handler(getTrackerHandler(Types.UNSIGNED_BYTE, 0));
 
-                // Rewrite entity type / metadata
+                // Rewrite entity type / data
                 handler(getMobSpawnRewriter(Types1_9.ENTITY_DATA_LIST));
 
                 // Sub 1.11 clients will error if the list is empty
                 handler(wrapper -> {
-                    List<EntityData> metadata = wrapper.get(Types1_9.ENTITY_DATA_LIST, 0);
-                    if (metadata.isEmpty()) {
-                        metadata.add(new EntityData(0, EntityDataTypes1_9.BYTE, (byte) 0));
+                    List<EntityData> entityDataList = wrapper.get(Types1_9.ENTITY_DATA_LIST, 0);
+                    if (entityDataList.isEmpty()) {
+                        entityDataList.add(new EntityData(0, EntityDataTypes1_9.BYTE, (byte) 0));
                     }
                 });
             }
@@ -136,14 +136,14 @@ public class EntityPacketRewriter1_11 extends LegacyEntityRewriter<ClientboundPa
                 map(Types.DOUBLE); // 4 - Z
                 map(Types.BYTE); // 5 - Yaw
                 map(Types.BYTE); // 6 - Pitch
-                map(Types1_9.ENTITY_DATA_LIST); // 7 - Metadata list
+                map(Types1_9.ENTITY_DATA_LIST); // 7 - Entity data list
 
-                handler(getTrackerAndMetaHandler(Types1_9.ENTITY_DATA_LIST, EntityTypes1_11.EntityType.PLAYER));
+                handler(getTrackerAndDataHandler(Types1_9.ENTITY_DATA_LIST, EntityTypes1_11.EntityType.PLAYER));
                 handler(wrapper -> {
                     // Sub 1.11 clients will cry if the list is empty
-                    List<EntityData> metadata = wrapper.get(Types1_9.ENTITY_DATA_LIST, 0);
-                    if (metadata.isEmpty()) {
-                        metadata.add(new EntityData(0, EntityDataTypes1_9.BYTE, (byte) 0));
+                    List<EntityData> entityDataList = wrapper.get(Types1_9.ENTITY_DATA_LIST, 0);
+                    if (entityDataList.isEmpty()) {
+                        entityDataList.add(new EntityData(0, EntityDataTypes1_9.BYTE, (byte) 0));
                     }
                 });
             }
@@ -159,9 +159,15 @@ public class EntityPacketRewriter1_11 extends LegacyEntityRewriter<ClientboundPa
                 map(Types.BYTE); // 1 - Entity Status
 
                 handler(wrapper -> {
-                    byte b = wrapper.get(Types.BYTE, 0);
+                    final int entityId = wrapper.get(Types.INT, 0);
+                    if (entityId != tracker(wrapper.user()).clientEntityId()) {
+                        // Entity events are sent for all players, but we only want to apply this for the self player
+                        return;
+                    }
 
-                    if (b == 35) {
+                    final byte entityStatus = wrapper.get(Types.BYTE, 0);
+                    if (entityStatus == 35) {
+                        // TODO spawn particles?
                         wrapper.clearPacket();
                         wrapper.setPacketType(ClientboundPackets1_9_3.GAME_EVENT);
                         wrapper.write(Types.UNSIGNED_BYTE, (short) 10); // Play Elder Guardian animation
@@ -177,39 +183,39 @@ public class EntityPacketRewriter1_11 extends LegacyEntityRewriter<ClientboundPa
         // Guardian
         mapEntityTypeWithData(EntityTypes1_11.EntityType.ELDER_GUARDIAN, EntityTypes1_11.EntityType.GUARDIAN);
         // Skeletons
-        mapEntityTypeWithData(EntityTypes1_11.EntityType.WITHER_SKELETON, EntityTypes1_11.EntityType.SKELETON).spawnMetadata(storage -> storage.add(getSkeletonTypeMeta(1)));
-        mapEntityTypeWithData(EntityTypes1_11.EntityType.STRAY, EntityTypes1_11.EntityType.SKELETON).plainName().spawnMetadata(storage -> storage.add(getSkeletonTypeMeta(2)));
+        mapEntityTypeWithData(EntityTypes1_11.EntityType.WITHER_SKELETON, EntityTypes1_11.EntityType.SKELETON).spawnEntityData(storage -> storage.add(getSkeletonTypeData(1)));
+        mapEntityTypeWithData(EntityTypes1_11.EntityType.STRAY, EntityTypes1_11.EntityType.SKELETON).plainName().spawnEntityData(storage -> storage.add(getSkeletonTypeData(2)));
         // Zombies
-        mapEntityTypeWithData(EntityTypes1_11.EntityType.HUSK, EntityTypes1_11.EntityType.ZOMBIE).plainName().spawnMetadata(storage -> handleZombieType(storage, 6));
-        mapEntityTypeWithData(EntityTypes1_11.EntityType.ZOMBIE_VILLAGER, EntityTypes1_11.EntityType.ZOMBIE).spawnMetadata(storage -> handleZombieType(storage, 1));
+        mapEntityTypeWithData(EntityTypes1_11.EntityType.HUSK, EntityTypes1_11.EntityType.ZOMBIE).plainName().spawnEntityData(storage -> handleZombieType(storage, 6));
+        mapEntityTypeWithData(EntityTypes1_11.EntityType.ZOMBIE_VILLAGER, EntityTypes1_11.EntityType.ZOMBIE).spawnEntityData(storage -> handleZombieType(storage, 1));
         // Horses
-        mapEntityTypeWithData(EntityTypes1_11.EntityType.HORSE, EntityTypes1_11.EntityType.HORSE).spawnMetadata(storage -> storage.add(getHorseMetaType(0))); // Nob able to ride the horse without having the MetaType sent.
-        mapEntityTypeWithData(EntityTypes1_11.EntityType.DONKEY, EntityTypes1_11.EntityType.HORSE).spawnMetadata(storage -> storage.add(getHorseMetaType(1)));
-        mapEntityTypeWithData(EntityTypes1_11.EntityType.MULE, EntityTypes1_11.EntityType.HORSE).spawnMetadata(storage -> storage.add(getHorseMetaType(2)));
-        mapEntityTypeWithData(EntityTypes1_11.EntityType.SKELETON_HORSE, EntityTypes1_11.EntityType.HORSE).spawnMetadata(storage -> storage.add(getHorseMetaType(4)));
-        mapEntityTypeWithData(EntityTypes1_11.EntityType.ZOMBIE_HORSE, EntityTypes1_11.EntityType.HORSE).spawnMetadata(storage -> storage.add(getHorseMetaType(3)));
+        mapEntityTypeWithData(EntityTypes1_11.EntityType.HORSE, EntityTypes1_11.EntityType.HORSE).spawnEntityData(storage -> storage.add(getHorseDataType(0))); // Nob able to ride the horse without having the EntityDataType sent.
+        mapEntityTypeWithData(EntityTypes1_11.EntityType.DONKEY, EntityTypes1_11.EntityType.HORSE).spawnEntityData(storage -> storage.add(getHorseDataType(1)));
+        mapEntityTypeWithData(EntityTypes1_11.EntityType.MULE, EntityTypes1_11.EntityType.HORSE).spawnEntityData(storage -> storage.add(getHorseDataType(2)));
+        mapEntityTypeWithData(EntityTypes1_11.EntityType.SKELETON_HORSE, EntityTypes1_11.EntityType.HORSE).spawnEntityData(storage -> storage.add(getHorseDataType(4)));
+        mapEntityTypeWithData(EntityTypes1_11.EntityType.ZOMBIE_HORSE, EntityTypes1_11.EntityType.HORSE).spawnEntityData(storage -> storage.add(getHorseDataType(3)));
         // New mobs
         mapEntityTypeWithData(EntityTypes1_11.EntityType.EVOKER_FANGS, EntityTypes1_11.EntityType.SHULKER);
         mapEntityTypeWithData(EntityTypes1_11.EntityType.EVOKER, EntityTypes1_11.EntityType.VILLAGER).plainName();
         mapEntityTypeWithData(EntityTypes1_11.EntityType.VEX, EntityTypes1_11.EntityType.BAT).plainName();
-        mapEntityTypeWithData(EntityTypes1_11.EntityType.VINDICATOR, EntityTypes1_11.EntityType.VILLAGER).plainName().spawnMetadata(storage -> storage.add(new EntityData(13, EntityDataTypes1_9.VAR_INT, 4))); // Base Profession
-        mapEntityTypeWithData(EntityTypes1_11.EntityType.LLAMA, EntityTypes1_11.EntityType.HORSE).plainName().spawnMetadata(storage -> storage.add(getHorseMetaType(1)));
+        mapEntityTypeWithData(EntityTypes1_11.EntityType.VINDICATOR, EntityTypes1_11.EntityType.VILLAGER).plainName().spawnEntityData(storage -> storage.add(new EntityData(13, EntityDataTypes1_9.VAR_INT, 4))); // Base Profession
+        mapEntityTypeWithData(EntityTypes1_11.EntityType.LLAMA, EntityTypes1_11.EntityType.HORSE).plainName().spawnEntityData(storage -> storage.add(getHorseDataType(1)));
         mapEntityTypeWithData(EntityTypes1_11.EntityType.LLAMA_SPIT, EntityTypes1_11.EntityType.SNOWBALL);
 
         mapObjectType(EntityTypes1_11.ObjectType.LLAMA_SPIT, EntityTypes1_11.ObjectType.SNOWBALL, -1);
         // Replace with endertorchthingies
         mapObjectType(EntityTypes1_11.ObjectType.EVOKER_FANGS, EntityTypes1_11.ObjectType.FALLING_BLOCK, 198 | 1 << 12);
 
-        // Handle ElderGuardian & target metadata
-        filter().type(EntityTypes1_11.EntityType.GUARDIAN).index(12).handler((event, meta) -> {
-            boolean b = (boolean) meta.getValue();
+        // Handle ElderGuardian & target entity data
+        filter().type(EntityTypes1_11.EntityType.GUARDIAN).index(12).handler((event, data) -> {
+            boolean b = (boolean) data.getValue();
             int bitmask = b ? 0x02 : 0;
 
             if (event.entityType() == EntityTypes1_11.EntityType.ELDER_GUARDIAN) {
                 bitmask |= 0x04;
             }
 
-            meta.setTypeAndValue(EntityDataTypes1_9.BYTE, (byte) bitmask);
+            data.setTypeAndValue(EntityDataTypes1_9.BYTE, (byte) bitmask);
         });
 
         // Handle skeleton swing
@@ -218,34 +224,34 @@ public class EntityPacketRewriter1_11 extends LegacyEntityRewriter<ClientboundPa
         /*
             ZOMBIE CHANGES
          */
-        filter().type(EntityTypes1_11.EntityType.ZOMBIE).handler((event, meta) -> {
-            switch (meta.id()) {
+        filter().type(EntityTypes1_11.EntityType.ZOMBIE).handler((event, data) -> {
+            switch (data.id()) {
                 case 13 -> event.cancel();
                 case 14 -> event.setIndex(15);
                 case 15 -> event.setIndex(14);
                 case 16 -> {
                     // Profession
                     event.setIndex(13);
-                    meta.setValue(1 + (int) meta.getValue());
+                    data.setValue(1 + (int) data.getValue());
                 }
             }
         });
 
         // Handle Evocation Illager
-        filter().type(EntityTypes1_11.EntityType.EVOKER).index(12).handler((event, meta) -> {
+        filter().type(EntityTypes1_11.EntityType.EVOKER).index(12).handler((event, data) -> {
             event.setIndex(13);
-            meta.setTypeAndValue(EntityDataTypes1_9.VAR_INT, ((Byte) meta.getValue()).intValue()); // Change the profession for the states
+            data.setTypeAndValue(EntityDataTypes1_9.VAR_INT, ((Byte) data.getValue()).intValue()); // Change the profession for the states
         });
 
         // Handle Vex (Remove this field completely since the position is not updated correctly when idling for bats. Sad ):
-        filter().type(EntityTypes1_11.EntityType.VEX).index(12).handler((event, meta) -> {
-            meta.setValue((byte) 0x00);
+        filter().type(EntityTypes1_11.EntityType.VEX).index(12).handler((event, data) -> {
+            data.setValue((byte) 0x00);
         });
 
         // Handle VindicationIllager
-        filter().type(EntityTypes1_11.EntityType.VINDICATOR).index(12).handler((event, meta) -> {
+        filter().type(EntityTypes1_11.EntityType.VINDICATOR).index(12).handler((event, data) -> {
             event.setIndex(13);
-            meta.setTypeAndValue(EntityDataTypes1_9.VAR_INT, ((Number) meta.getValue()).intValue() == 1 ? 2 : 4);
+            data.setTypeAndValue(EntityDataTypes1_9.VAR_INT, ((Number) data.getValue()).intValue() == 1 ? 2 : 4);
         });
 
         /*
@@ -253,20 +259,20 @@ public class EntityPacketRewriter1_11 extends LegacyEntityRewriter<ClientboundPa
          */
 
         // Handle horse flags
-        filter().type(EntityTypes1_11.EntityType.ABSTRACT_HORSE).index(13).handler((event, meta) -> {
-            StoredEntityData data = storedEntityData(event);
-            byte b = (byte) meta.getValue();
-            if (data.has(ChestedHorseStorage.class) && data.get(ChestedHorseStorage.class).isChested()) {
+        filter().type(EntityTypes1_11.EntityType.ABSTRACT_HORSE).index(13).handler((event, data) -> {
+            StoredEntityData entityData = storedEntityData(event);
+            byte b = (byte) data.getValue();
+            if (entityData.has(ChestedHorseStorage.class) && entityData.get(ChestedHorseStorage.class).isChested()) {
                 b |= 0x08; // Chested
-                meta.setValue(b);
+                data.setValue(b);
             }
         });
 
         // Create chested horse storage
-        filter().type(EntityTypes1_11.EntityType.CHESTED_HORSE).handler((event, meta) -> {
-            StoredEntityData data = storedEntityData(event);
-            if (!data.has(ChestedHorseStorage.class)) {
-                data.put(new ChestedHorseStorage());
+        filter().type(EntityTypes1_11.EntityType.CHESTED_HORSE).handler((event, data) -> {
+            StoredEntityData entityData = storedEntityData(event);
+            if (!entityData.has(ChestedHorseStorage.class)) {
+                entityData.put(new ChestedHorseStorage());
             }
         });
 
@@ -274,32 +280,32 @@ public class EntityPacketRewriter1_11 extends LegacyEntityRewriter<ClientboundPa
         filter().type(EntityTypes1_11.EntityType.HORSE).index(16).toIndex(17);
 
         // Handle chested horse
-        filter().type(EntityTypes1_11.EntityType.CHESTED_HORSE).index(15).handler((event, meta) -> {
-            StoredEntityData data = storedEntityData(event);
-            ChestedHorseStorage storage = data.get(ChestedHorseStorage.class);
-            boolean b = (boolean) meta.getValue();
+        filter().type(EntityTypes1_11.EntityType.CHESTED_HORSE).index(15).handler((event, data) -> {
+            StoredEntityData entityData = storedEntityData(event);
+            ChestedHorseStorage storage = entityData.get(ChestedHorseStorage.class);
+            boolean b = (boolean) data.getValue();
             storage.setChested(b);
             event.cancel();
         });
 
-        // Get rid of Liama metadata
-        filter().type(EntityTypes1_11.EntityType.LLAMA).handler((event, meta) -> {
-            StoredEntityData data = storedEntityData(event);
-            ChestedHorseStorage storage = data.get(ChestedHorseStorage.class);
+        // Get rid of Liama entity data
+        filter().type(EntityTypes1_11.EntityType.LLAMA).handler((event, data) -> {
+            StoredEntityData entityData = storedEntityData(event);
+            ChestedHorseStorage storage = entityData.get(ChestedHorseStorage.class);
 
             int index = event.index();
             // Store them for later (:
             switch (index) {
                 case 16 -> {
-                    storage.setLiamaStrength((int) meta.getValue());
+                    storage.setLiamaStrength((int) data.getValue());
                     event.cancel();
                 }
                 case 17 -> {
-                    storage.setLiamaCarpetColor((int) meta.getValue());
+                    storage.setLiamaCarpetColor((int) data.getValue());
                     event.cancel();
                 }
                 case 18 -> {
-                    storage.setLiamaVariant((int) meta.getValue());
+                    storage.setLiamaVariant((int) data.getValue());
                     event.cancel();
                 }
             }
@@ -309,13 +315,13 @@ public class EntityPacketRewriter1_11 extends LegacyEntityRewriter<ClientboundPa
         filter().type(EntityTypes1_11.EntityType.ABSTRACT_HORSE).index(14).toIndex(16);
 
         // Handle villager - Change non-existing profession
-        filter().type(EntityTypes1_11.EntityType.VILLAGER).index(13).handler((event, meta) -> {
-            if ((int) meta.getValue() == 5) {
-                meta.setValue(0);
+        filter().type(EntityTypes1_11.EntityType.VILLAGER).index(13).handler((event, data) -> {
+            if ((int) data.getValue() == 5) {
+                data.setValue(0);
             }
         });
 
-        // handle new Shulker color meta
+        // handle new Shulker color data
         filter().type(EntityTypes1_11.EntityType.SHULKER).cancel(15);
     }
 
@@ -325,7 +331,7 @@ public class EntityPacketRewriter1_11 extends LegacyEntityRewriter<ClientboundPa
         2 - Stray
      */
 
-    private EntityData getSkeletonTypeMeta(int type) {
+    private EntityData getSkeletonTypeData(int type) {
         return new EntityData(12, EntityDataTypes1_9.VAR_INT, type);
     }
 
@@ -334,14 +340,14 @@ public class EntityPacketRewriter1_11 extends LegacyEntityRewriter<ClientboundPa
         1-5 - Villager with profession
         6 - Husk
      */
-    private EntityData getZombieTypeMeta(int type) {
+    private EntityData getZombieTypeData(int type) {
         return new EntityData(13, EntityDataTypes1_9.VAR_INT, type);
     }
 
-    private void handleZombieType(WrappedMetadata storage, int type) {
+    private void handleZombieType(WrappedEntityData storage, int type) {
         EntityData meta = storage.get(13);
         if (meta == null) {
-            storage.add(getZombieTypeMeta(type));
+            storage.add(getZombieTypeData(type));
         }
     }
 
@@ -352,7 +358,7 @@ public class EntityPacketRewriter1_11 extends LegacyEntityRewriter<ClientboundPa
         Zombie horse 3
         Skeleton horse 4
     */
-    private EntityData getHorseMetaType(int type) {
+    private EntityData getHorseDataType(int type) {
         return new EntityData(14, EntityDataTypes1_9.VAR_INT, type);
     }
 

common/src/main/java/com/viaversion/viabackwards/protocol/v1_12to1_11_1/Protocol1_12To1_11_1.java

@@ -71,11 +71,8 @@ public class Protocol1_12To1_11_1 extends BackwardsProtocol<ClientboundPackets1_
 
     @Override
     public void init(UserConnection user) {
-        if (!user.has(ClientWorld.class)) {
-            user.put(new ClientWorld());
-        }
-
         user.addEntityTracker(this.getClass(), new EntityTrackerBase(user, EntityTypes1_12.EntityType.PLAYER));
+        user.addClientWorld(this.getClass(), new ClientWorld());
 
         user.put(new ShoulderTracker(user));
     }

common/src/main/java/com/viaversion/viabackwards/protocol/v1_12to1_11_1/rewriter/BlockItemPacketRewriter1_12.java

@@ -18,6 +18,7 @@
 
 package com.viaversion.viabackwards.protocol.v1_12to1_11_1.rewriter;
 
+import com.viaversion.nbt.tag.StringTag;
 import com.viaversion.viabackwards.api.rewriters.LegacyBlockItemRewriter;
 import com.viaversion.viabackwards.protocol.v1_12to1_11_1.Protocol1_12To1_11_1;
 import com.viaversion.viabackwards.protocol.v1_12to1_11_1.data.MapColorMappings1_11_1;
@@ -38,6 +39,9 @@ import com.viaversion.viaversion.protocols.v1_11_1to1_12.packet.ServerboundPacke
 import com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ServerboundPackets1_9_3;
 import java.util.Iterator;
 import java.util.Map;
+import com.viaversion.viaversion.util.ComponentUtil;
+import com.viaversion.viaversion.util.Key;
+import com.viaversion.viaversion.util.SerializerVersion;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 public class BlockItemPacketRewriter1_12 extends LegacyBlockItemRewriter<ClientboundPackets1_12, ServerboundPackets1_9_3, Protocol1_12To1_11_1> {
@@ -127,12 +131,21 @@ public class BlockItemPacketRewriter1_12 extends LegacyBlockItemRewriter<Clientb
         registerSetCreativeModeSlot(ServerboundPackets1_9_3.SET_CREATIVE_MODE_SLOT);
 
         protocol.registerClientbound(ClientboundPackets1_12.LEVEL_CHUNK, wrapper -> {
-            ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
+            ClientWorld clientWorld = wrapper.user().getClientWorld(Protocol1_12To1_11_1.class);
 
             ChunkType1_9_3 type = ChunkType1_9_3.forEnvironment(clientWorld.getEnvironment()); // Use the 1.9.4 Chunk type since nothing changed.
             Chunk chunk = wrapper.passthrough(type);
 
             handleChunk(chunk);
+            for (final CompoundTag tag : chunk.getBlockEntities()) {
+                final String id = tag.getString("id");
+                if (id == null) {
+                    continue;
+                }
+                if (Key.stripMinecraftNamespace(id).equals("sign")) {
+                    handleSignText(tag);
+                }
+            }
         });
 
         protocol.registerClientbound(ClientboundPackets1_12.BLOCK_ENTITY_DATA, new PacketHandlers() {
@@ -143,16 +156,21 @@ public class BlockItemPacketRewriter1_12 extends LegacyBlockItemRewriter<Clientb
                 map(Types.NAMED_COMPOUND_TAG); // 2 - NBT
 
                 handler(wrapper -> {
-                    // Remove bed color
-                    if (wrapper.get(Types.UNSIGNED_BYTE, 0) == 11)
+                    final short type = wrapper.get(Types.UNSIGNED_BYTE, 0);
+                    if (type == 9) {
+                        final CompoundTag tag = wrapper.get(Types.NAMED_COMPOUND_TAG, 0);
+                        handleSignText(tag);
+                    } else if (type == 11) {
+                        // Remove bed color
                         wrapper.cancel();
+                    }
                 });
             }
         });
 
-        protocol.getEntityRewriter().filter().handler((event, meta) -> {
-            if (meta.dataType().type().equals(Types.ITEM1_8)) // Is Item
-                meta.setValue(handleItemToClient(event.user(), (Item) meta.getValue()));
+        protocol.getEntityRewriter().filter().handler((event, data) -> {
+            if (data.dataType().type().equals(Types.ITEM1_8)) // Is Item
+                data.setValue(handleItemToClient(event.user(), (Item) data.getValue()));
         });
 
         protocol.registerServerbound(ServerboundPackets1_9_3.CLIENT_COMMAND, new PacketHandlers() {
@@ -170,6 +188,18 @@ public class BlockItemPacketRewriter1_12 extends LegacyBlockItemRewriter<Clientb
         });
     }
 
+    private void handleSignText(final CompoundTag tag) {
+        // Push signs through component conversion, fixes https://github.com/ViaVersion/ViaBackwards/issues/835
+        for (int i = 0; i < 4; i++) {
+            final StringTag lineTag = tag.getStringTag("Text" + (i + 1));
+            if (lineTag == null) {
+                continue;
+            }
+
+            lineTag.setValue(ComponentUtil.convertJsonOrEmpty(lineTag.getValue(), SerializerVersion.V1_12, SerializerVersion.V1_9).toString());
+        }
+    }
+
     @Override
     public @Nullable Item handleItemToClient(UserConnection connection, Item item) {
         if (item == null) return null;

common/src/main/java/com/viaversion/viabackwards/protocol/v1_12to1_11_1/rewriter/EntityPacketRewriter1_12.java

@@ -31,6 +31,7 @@ import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.api.type.types.version.Types1_12;
+import com.viaversion.viaversion.api.type.types.version.Types1_9;
 import com.viaversion.viaversion.libs.gson.JsonElement;
 import com.viaversion.viaversion.protocols.v1_11_1to1_12.packet.ClientboundPackets1_12;
 import com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ClientboundPackets1_9_3;
@@ -83,13 +84,13 @@ public class EntityPacketRewriter1_12 extends LegacyEntityRewriter<ClientboundPa
                 map(Types.SHORT); // 9 - Velocity X
                 map(Types.SHORT); // 10 - Velocity Y
                 map(Types.SHORT); // 11 - Velocity Z
-                map(Types1_12.ENTITY_DATA_LIST); // 12 - Metadata
+                map(Types1_12.ENTITY_DATA_LIST, Types1_9.ENTITY_DATA_LIST); // 12 - Entity data
 
                 // Track entity
                 handler(getTrackerHandler());
 
-                // Rewrite entity type / metadata
-                handler(getMobSpawnRewriter1_11(Types1_12.ENTITY_DATA_LIST));
+                // Rewrite entity type / data
+                handler(getMobSpawnRewriter1_11(Types1_9.ENTITY_DATA_LIST));
             }
         });
 
@@ -105,9 +106,9 @@ public class EntityPacketRewriter1_12 extends LegacyEntityRewriter<ClientboundPa
                 map(Types.DOUBLE); // 4 - Z
                 map(Types.BYTE); // 5 - Yaw
                 map(Types.BYTE); // 6 - Pitch
-                map(Types1_12.ENTITY_DATA_LIST); // 7 - Metadata list
+                map(Types1_12.ENTITY_DATA_LIST, Types1_9.ENTITY_DATA_LIST); // 7 - Entity data list
 
-                handler(getTrackerAndMetaHandler(Types1_12.ENTITY_DATA_LIST, EntityTypes1_12.EntityType.PLAYER));
+                handler(getTrackerAndDataHandler(Types1_9.ENTITY_DATA_LIST, EntityTypes1_12.EntityType.PLAYER));
             }
         });
 
@@ -118,9 +119,8 @@ public class EntityPacketRewriter1_12 extends LegacyEntityRewriter<ClientboundPa
                 map(Types.UNSIGNED_BYTE); // 1 - Gamemode
                 map(Types.INT); // 2 - Dimension
 
-                handler(getTrackerHandler(EntityTypes1_12.EntityType.PLAYER, Types.INT));
-
                 handler(getDimensionHandler(1));
+                handler(getPlayerTrackerHandler());
 
                 handler(wrapper -> {
                     ShoulderTracker tracker = wrapper.user().get(ShoulderTracker.class);
@@ -142,7 +142,7 @@ public class EntityPacketRewriter1_12 extends LegacyEntityRewriter<ClientboundPa
 
         registerRespawn(ClientboundPackets1_12.RESPAWN);
         registerRemoveEntities(ClientboundPackets1_12.REMOVE_ENTITIES);
-        registerSetEntityData(ClientboundPackets1_12.SET_ENTITY_DATA, Types1_12.ENTITY_DATA_LIST);
+        registerSetEntityData(ClientboundPackets1_12.SET_ENTITY_DATA, Types1_12.ENTITY_DATA_LIST, Types1_9.ENTITY_DATA_LIST);
 
         protocol.registerClientbound(ClientboundPackets1_12.UPDATE_ATTRIBUTES, new PacketHandlers() {
             @Override
@@ -186,42 +186,42 @@ public class EntityPacketRewriter1_12 extends LegacyEntityRewriter<ClientboundPa
 
     @Override
     protected void registerRewrites() {
-        mapEntityTypeWithData(EntityTypes1_12.EntityType.PARROT, EntityTypes1_12.EntityType.BAT).plainName().spawnMetadata(storage -> storage.add(new EntityData(12, EntityDataTypes1_12.BYTE, (byte) 0x00)));
+        mapEntityTypeWithData(EntityTypes1_12.EntityType.PARROT, EntityTypes1_12.EntityType.BAT).plainName().spawnEntityData(storage -> storage.add(new EntityData(12, EntityDataTypes1_12.BYTE, (byte) 0x00)));
         mapEntityTypeWithData(EntityTypes1_12.EntityType.ILLUSIONER, EntityTypes1_12.EntityType.EVOKER).plainName();
 
-        filter().handler((event, meta) -> {
-            if (meta.dataType() == EntityDataTypes1_12.COMPONENT) {
-                protocol.getComponentRewriter().processText(event.user(), (JsonElement) meta.getValue());
+        filter().handler((event, data) -> {
+            if (data.dataType() == EntityDataTypes1_12.COMPONENT) {
+                protocol.getComponentRewriter().processText(event.user(), (JsonElement) data.getValue());
             }
         });
 
         // Handle Illager
         filter().type(EntityTypes1_12.EntityType.EVOKER).removeIndex(12);
 
-        filter().type(EntityTypes1_12.EntityType.ILLUSIONER).index(0).handler((event, meta) -> {
-            byte mask = (byte) meta.getValue();
+        filter().type(EntityTypes1_12.EntityType.ILLUSIONER).index(0).handler((event, data) -> {
+            byte mask = (byte) data.getValue();
 
             if ((mask & 0x20) == 0x20) {
                 mask &= ~0x20;
             }
 
-            meta.setValue(mask);
+            data.setValue(mask);
         });
 
         // Create Parrot storage
-        filter().type(EntityTypes1_12.EntityType.PARROT).handler((event, meta) -> {
-            StoredEntityData data = storedEntityData(event);
-            if (!data.has(ParrotStorage.class)) {
-                data.put(new ParrotStorage());
+        filter().type(EntityTypes1_12.EntityType.PARROT).handler((event, data) -> {
+            StoredEntityData entityData = storedEntityData(event);
+            if (!entityData.has(ParrotStorage.class)) {
+                entityData.put(new ParrotStorage());
             }
         });
-        // Parrot remove animal metadata
+        // Parrot remove animal entity data
         filter().type(EntityTypes1_12.EntityType.PARROT).cancel(12); // Is baby
-        filter().type(EntityTypes1_12.EntityType.PARROT).index(13).handler((event, meta) -> {
-            StoredEntityData data = storedEntityData(event);
-            ParrotStorage storage = data.get(ParrotStorage.class);
-            boolean isSitting = (((byte) meta.getValue()) & 0x01) == 0x01;
-            boolean isTamed = (((byte) meta.getValue()) & 0x04) == 0x04;
+        filter().type(EntityTypes1_12.EntityType.PARROT).index(13).handler((event, data) -> {
+            StoredEntityData entityData = storedEntityData(event);
+            ParrotStorage storage = entityData.get(ParrotStorage.class);
+            boolean isSitting = (((byte) data.getValue()) & 0x01) == 0x01;
+            boolean isTamed = (((byte) data.getValue()) & 0x04) == 0x04;
 
             if (!storage.isTamed() && isTamed) {
                 // TODO do something to let the user know it's done
@@ -231,11 +231,11 @@ public class EntityPacketRewriter1_12 extends LegacyEntityRewriter<ClientboundPa
 
             if (isSitting) {
                 event.setIndex(12);
-                meta.setValue((byte) 0x01);
+                data.setValue((byte) 0x01);
                 storage.setSitting(true);
             } else if (storage.isSitting()) {
                 event.setIndex(12);
-                meta.setValue((byte) 0x00);
+                data.setValue((byte) 0x00);
                 storage.setSitting(false);
             } else {
                 event.cancel();
@@ -245,8 +245,8 @@ public class EntityPacketRewriter1_12 extends LegacyEntityRewriter<ClientboundPa
         filter().type(EntityTypes1_12.EntityType.PARROT).cancel(15); // Variant
 
         // Left shoulder entity data
-        filter().type(EntityTypes1_12.EntityType.PLAYER).index(15).handler((event, meta) -> {
-            CompoundTag tag = (CompoundTag) meta.getValue();
+        filter().type(EntityTypes1_12.EntityType.PLAYER).index(15).handler((event, data) -> {
+            CompoundTag tag = (CompoundTag) data.getValue();
             ShoulderTracker tracker = event.user().get(ShoulderTracker.class);
 
             if (tag.isEmpty() && tracker.getLeftShoulder() != null) {
@@ -264,7 +264,7 @@ public class EntityPacketRewriter1_12 extends LegacyEntityRewriter<ClientboundPa
         });
 
         // Right shoulder entity data
-        filter().type(EntityTypes1_12.EntityType.PLAYER).index(16).handler((event, meta) -> {
+        filter().type(EntityTypes1_12.EntityType.PLAYER).index(16).handler((event, data) -> {
             CompoundTag tag = (CompoundTag) event.data().getValue();
             ShoulderTracker tracker = event.user().get(ShoulderTracker.class);
 

common/src/main/java/com/viaversion/viabackwards/protocol/v1_13_1to1_13/Protocol1_13_1To1_13.java

@@ -41,6 +41,7 @@ import com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPacke
 import com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ServerboundPackets1_13;
 import com.viaversion.viaversion.protocols.v1_13to1_13_1.Protocol1_13To1_13_1;
 import com.viaversion.viaversion.rewriter.ComponentRewriter;
+import com.viaversion.viaversion.rewriter.ParticleRewriter;
 import com.viaversion.viaversion.rewriter.StatisticsRewriter;
 import com.viaversion.viaversion.rewriter.TagRewriter;
 import com.viaversion.viaversion.util.ComponentUtil;
@@ -50,6 +51,7 @@ public class Protocol1_13_1To1_13 extends BackwardsProtocol<ClientboundPackets1_
     public static final BackwardsMappingData MAPPINGS = new BackwardsMappingData("1.13.2", "1.13", Protocol1_13To1_13_1.class);
     private final EntityPacketRewriter1_13_1 entityRewriter = new EntityPacketRewriter1_13_1(this);
     private final ItemPacketRewriter1_13_1 itemRewriter = new ItemPacketRewriter1_13_1(this);
+    private final ParticleRewriter<ClientboundPackets1_13> particleRewriter = new ParticleRewriter<>(this);
     private final TranslatableRewriter<ClientboundPackets1_13> translatableRewriter = new TranslatableRewriter<>(this, ComponentRewriter.ReadType.JSON);
     private final TagRewriter<ClientboundPackets1_13> tagRewriter = new TagRewriter<>(this);
 
@@ -72,6 +74,8 @@ public class Protocol1_13_1To1_13 extends BackwardsProtocol<ClientboundPackets1_
 
         new CommandRewriter1_13_1(this).registerDeclareCommands(ClientboundPackets1_13.COMMANDS);
 
+        particleRewriter.registerLevelParticles1_13(ClientboundPackets1_13.LEVEL_PARTICLES, Types.FLOAT);
+
         registerServerbound(ServerboundPackets1_13.COMMAND_SUGGESTION, new PacketHandlers() {
             @Override
             public void register() {
@@ -203,10 +207,7 @@ public class Protocol1_13_1To1_13 extends BackwardsProtocol<ClientboundPackets1_
     @Override
     public void init(UserConnection user) {
         user.addEntityTracker(getClass(), new EntityTrackerBase(user, EntityTypes1_13.EntityType.PLAYER));
-
-        if (!user.has(ClientWorld.class)) {
-            user.put(new ClientWorld());
-        }
+        user.addClientWorld(getClass(), new ClientWorld());
     }
 
     @Override
@@ -224,6 +225,11 @@ public class Protocol1_13_1To1_13 extends BackwardsProtocol<ClientboundPackets1_
         return itemRewriter;
     }
 
+    @Override
+    public ParticleRewriter<ClientboundPackets1_13> getParticleRewriter() {
+        return particleRewriter;
+    }
+
     public TranslatableRewriter<ClientboundPackets1_13> translatableRewriter() {
         return translatableRewriter;
     }

common/src/main/java/com/viaversion/viabackwards/protocol/v1_13_1to1_13/rewriter/EntityPacketRewriter1_13_1.java

@@ -22,8 +22,8 @@ import com.viaversion.viabackwards.protocol.v1_13_1to1_13.Protocol1_13_1To1_13;
 import com.viaversion.viaversion.api.minecraft.Particle;
 import com.viaversion.viaversion.api.minecraft.entities.EntityType;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_13;
-import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.minecraft.entitydata.EntityData;
+import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.api.type.types.version.Types1_13;
@@ -91,15 +91,15 @@ public class EntityPacketRewriter1_13_1 extends LegacyEntityRewriter<Clientbound
                 map(Types.SHORT); // 9 - Velocity X
                 map(Types.SHORT); // 10 - Velocity Y
                 map(Types.SHORT); // 11 - Velocity Z
-                map(Types1_13.ENTITY_DATA_LIST); // 12 - Metadata
+                map(Types1_13.ENTITY_DATA_LIST); // 12 - Entity data
 
                 // Track Entity
                 handler(getTrackerHandler());
 
-                // Rewrite Metadata
+                // Rewrite Entity data
                 handler(wrapper -> {
-                    List<EntityData> metadata = wrapper.get(Types1_13.ENTITY_DATA_LIST, 0);
-                    handleEntityData(wrapper.get(Types.VAR_INT, 0), metadata, wrapper.user());
+                    List<EntityData> entityDataList = wrapper.get(Types1_13.ENTITY_DATA_LIST, 0);
+                    handleEntityData(wrapper.get(Types.VAR_INT, 0), entityDataList, wrapper.user());
                 });
             }
         });
@@ -114,9 +114,9 @@ public class EntityPacketRewriter1_13_1 extends LegacyEntityRewriter<Clientbound
                 map(Types.DOUBLE); // 4 - Z
                 map(Types.BYTE); // 5 - Yaw
                 map(Types.BYTE); // 6 - Pitch
-                map(Types1_13.ENTITY_DATA_LIST); // 7 - Metadata
+                map(Types1_13.ENTITY_DATA_LIST); // 7 - Entity data
 
-                handler(getTrackerAndMetaHandler(Types1_13.ENTITY_DATA_LIST, EntityTypes1_13.EntityType.PLAYER));
+                handler(getTrackerAndDataHandler(Types1_13.ENTITY_DATA_LIST, EntityTypes1_13.EntityType.PLAYER));
             }
         });
 
@@ -130,17 +130,17 @@ public class EntityPacketRewriter1_13_1 extends LegacyEntityRewriter<Clientbound
     @Override
     protected void registerRewrites() {
         // Rewrite items & blocks
-        filter().handler((event, meta) -> {
-            if (meta.dataType() == Types1_13.ENTITY_DATA_TYPES.itemType) {
-                protocol.getItemRewriter().handleItemToClient(event.user(), (Item) meta.getValue());
-            } else if (meta.dataType() == Types1_13.ENTITY_DATA_TYPES.optionalBlockStateType) {
+        filter().handler((event, data) -> {
+            if (data.dataType() == Types1_13.ENTITY_DATA_TYPES.itemType) {
+                protocol.getItemRewriter().handleItemToClient(event.user(), (Item) data.getValue());
+            } else if (data.dataType() == Types1_13.ENTITY_DATA_TYPES.optionalBlockStateType) {
                 // Convert to new block id
-                int data = (int) meta.getValue();
-                meta.setValue(protocol.getMappingData().getNewBlockStateId(data));
-            } else if (meta.dataType() == Types1_13.ENTITY_DATA_TYPES.particleType) {
-                rewriteParticle(event.user(), (Particle) meta.getValue());
-            } else if (meta.dataType() == Types1_13.ENTITY_DATA_TYPES.optionalComponentType || meta.dataType() == Types1_13.ENTITY_DATA_TYPES.componentType) {
-                JsonElement element = meta.value();
+                int value = (int) data.getValue();
+                data.setValue(protocol.getMappingData().getNewBlockStateId(value));
+            } else if (data.dataType() == Types1_13.ENTITY_DATA_TYPES.particleType) {
+                protocol.getParticleRewriter().rewriteParticle(event.user(), (Particle) data.getValue());
+            } else if (data.dataType() == Types1_13.ENTITY_DATA_TYPES.optionalComponentType || data.dataType() == Types1_13.ENTITY_DATA_TYPES.componentType) {
+                JsonElement element = data.value();
                 protocol.translatableRewriter().processText(event.user(), element);
             }
         });

common/src/main/java/com/viaversion/viabackwards/protocol/v1_13_1to1_13/rewriter/ItemPacketRewriter1_13_1.java

@@ -19,7 +19,6 @@ package com.viaversion.viabackwards.protocol.v1_13_1to1_13.rewriter;
 
 import com.viaversion.viabackwards.protocol.v1_13_1to1_13.Protocol1_13_1To1_13;
 import com.viaversion.viaversion.api.minecraft.item.Item;
-import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPackets1_13;
 import com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ServerboundPackets1_13;
@@ -68,7 +67,5 @@ public class ItemPacketRewriter1_13_1 extends ItemRewriter<ClientboundPackets1_1
         registerSetEquippedItem(ClientboundPackets1_13.SET_EQUIPPED_ITEM);
         registerContainerClick(ServerboundPackets1_13.CONTAINER_CLICK);
         registerSetCreativeModeSlot(ServerboundPackets1_13.SET_CREATIVE_MODE_SLOT);
-
-        registerLevelParticles(ClientboundPackets1_13.LEVEL_PARTICLES, Types.FLOAT);
     }
 }

common/src/main/java/com/viaversion/viabackwards/protocol/v1_13_1to1_13/rewriter/WorldPacketRewriter1_13_1.java

@@ -34,7 +34,7 @@ public class WorldPacketRewriter1_13_1 {
         BlockRewriter<ClientboundPackets1_13> blockRewriter = BlockRewriter.legacy(protocol);
 
         protocol.registerClientbound(ClientboundPackets1_13.LEVEL_CHUNK, wrapper -> {
-            ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
+            ClientWorld clientWorld = wrapper.user().getClientWorld(Protocol1_13_1To1_13.class);
             Chunk chunk = wrapper.passthrough(ChunkType1_13.forEnvironment(clientWorld.getEnvironment()));
 
             blockRewriter.handleChunk(chunk);

common/src/main/java/com/viaversion/viabackwards/protocol/v1_13_2to1_13_1/rewriter/EntityPacketRewriter1_13_2.java

@@ -18,9 +18,12 @@
 package com.viaversion.viabackwards.protocol.v1_13_2to1_13_1.rewriter;
 
 import com.viaversion.viabackwards.protocol.v1_13_2to1_13_1.Protocol1_13_2To1_13_1;
+import com.viaversion.viaversion.api.minecraft.Particle;
 import com.viaversion.viaversion.api.minecraft.entitydata.EntityData;
+import com.viaversion.viaversion.api.minecraft.entitydata.EntityDataType;
+import com.viaversion.viaversion.api.minecraft.item.Item;
+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;
 import com.viaversion.viaversion.api.type.types.version.Types1_13;
 import com.viaversion.viaversion.api.type.types.version.Types1_13_2;
@@ -45,13 +48,9 @@ public class EntityPacketRewriter1_13_2 {
                 map(Types.SHORT); // 9 - Velocity X
                 map(Types.SHORT); // 10 - Velocity Y
                 map(Types.SHORT); // 11 - Velocity Z
-                map(Types1_13_2.ENTITY_DATA_LIST, Types1_13.ENTITY_DATA_LIST); // 12 - Metadata
+                map(Types1_13_2.ENTITY_DATA_LIST, Types1_13.ENTITY_DATA_LIST); // 12 - Entity data
 
-                handler(wrapper -> {
-                    for (EntityData metadata : wrapper.get(Types1_13.ENTITY_DATA_LIST, 0)) {
-                        metadata.setDataType(Types1_13.ENTITY_DATA_TYPES.byId(metadata.dataType().typeId()));
-                    }
-                });
+                handler(EntityPacketRewriter1_13_2::updateEntityData);
             }
         });
 
@@ -65,13 +64,9 @@ public class EntityPacketRewriter1_13_2 {
                 map(Types.DOUBLE); // 4 - Z
                 map(Types.BYTE); // 5 - Yaw
                 map(Types.BYTE); // 6 - Pitch
-                map(Types1_13_2.ENTITY_DATA_LIST, Types1_13.ENTITY_DATA_LIST); // 7 - Metadata
+                map(Types1_13_2.ENTITY_DATA_LIST, Types1_13.ENTITY_DATA_LIST); // 7 - Entity data
 
-                handler(wrapper -> {
-                    for (EntityData metadata : wrapper.get(Types1_13.ENTITY_DATA_LIST, 0)) {
-                        metadata.setDataType(Types1_13.ENTITY_DATA_TYPES.byId(metadata.dataType().typeId()));
-                    }
-                });
+                handler(EntityPacketRewriter1_13_2::updateEntityData);
             }
         });
 
@@ -79,15 +74,25 @@ public class EntityPacketRewriter1_13_2 {
             @Override
             public void register() {
                 map(Types.VAR_INT); // 0 - Entity ID
-                map(Types1_13_2.ENTITY_DATA_LIST, Types1_13.ENTITY_DATA_LIST); // 1 - Metadata list
+                map(Types1_13_2.ENTITY_DATA_LIST, Types1_13.ENTITY_DATA_LIST); // 1 - Entity data list
 
-                handler(wrapper -> {
-                    for (EntityData metadata : wrapper.get(Types1_13.ENTITY_DATA_LIST, 0)) {
-                        metadata.setDataType(Types1_13.ENTITY_DATA_TYPES.byId(metadata.dataType().typeId()));
-                    }
-                });
+                handler(EntityPacketRewriter1_13_2::updateEntityData);
             }
         });
     }
 
+    private static void updateEntityData(final PacketWrapper wrapper) {
+        for (final EntityData data : wrapper.get(Types1_13.ENTITY_DATA_LIST, 0)) {
+            final EntityDataType dataType = Types1_13.ENTITY_DATA_TYPES.byId(data.dataType().typeId());
+            data.setDataType(dataType);
+
+            if (dataType == Types1_13.ENTITY_DATA_TYPES.particleType) {
+                final Particle particle = data.value();
+                if (particle.id() == 27) {
+                    final Item item = particle.<Item>getArgument(0).getValue();
+                    particle.set(0, Types.ITEM1_13, item);
+                }
+            }
+        }
+    }
 }

common/src/main/java/com/viaversion/viabackwards/protocol/v1_13to1_12_2/Protocol1_13To1_12_2.java

@@ -114,11 +114,8 @@ public class Protocol1_13To1_12_2 extends BackwardsProtocol<ClientboundPackets1_
 
     @Override
     public void init(UserConnection user) {
-        if (!user.has(ClientWorld.class)) {
-            user.put(new ClientWorld());
-        }
-
         user.addEntityTracker(this.getClass(), new EntityTrackerBase(user, EntityTypes1_13.EntityType.PLAYER));
+        user.addClientWorld(this.getClass(), new ClientWorld());
 
         user.put(new BackwardsBlockStorage());
         user.put(new TabCompleteStorage());

common/src/main/java/com/viaversion/viabackwards/protocol/v1_13to1_12_2/block_entity_handlers/BannerHandler.java

@@ -51,7 +51,9 @@ public class BannerHandler implements BackwardsBlockEntityHandler {
         if (patternsTag != null) {
             for (CompoundTag pattern : patternsTag) {
                 NumberTag colorTag = pattern.getNumberTag("Color");
-                pattern.putInt("Color", 15 - colorTag.asInt()); // Invert color id
+                if (colorTag != null) {
+                    pattern.putInt("Color", 15 - colorTag.asInt()); // Invert color id
+                }
             }
         }
 

common/src/main/java/com/viaversion/viabackwards/protocol/v1_13to1_12_2/rewriter/BlockItemPacketRewriter1_13.java

@@ -279,7 +279,7 @@ public class BlockItemPacketRewriter1_13 extends BackwardsItemRewriter<Clientbou
         });
 
         protocol.registerClientbound(ClientboundPackets1_13.LEVEL_CHUNK, wrapper -> {
-            ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
+            ClientWorld clientWorld = wrapper.user().getClientWorld(Protocol1_13To1_12_2.class);
 
             ChunkType1_9_3 type_old = ChunkType1_9_3.forEnvironment(clientWorld.getEnvironment());
             ChunkType1_13 type = ChunkType1_13.forEnvironment(clientWorld.getEnvironment());

common/src/main/java/com/viaversion/viabackwards/protocol/v1_13to1_12_2/rewriter/EntityPacketRewriter1_13.java

@@ -27,13 +27,15 @@ import com.viaversion.viabackwards.protocol.v1_13to1_12_2.data.ParticleIdMapping
 import com.viaversion.viabackwards.protocol.v1_13to1_12_2.storage.BackwardsBlockStorage;
 import com.viaversion.viabackwards.protocol.v1_13to1_12_2.storage.NoteBlockStorage;
 import com.viaversion.viabackwards.protocol.v1_13to1_12_2.storage.PlayerPositionStorage1_13;
+import com.viaversion.viaversion.api.minecraft.ClientWorld;
 import com.viaversion.viaversion.api.minecraft.Particle;
 import com.viaversion.viaversion.api.minecraft.entities.EntityType;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_13;
-import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.minecraft.entitydata.EntityData;
 import com.viaversion.viaversion.api.minecraft.entitydata.types.EntityDataTypes1_12;
+import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
+import com.viaversion.viaversion.api.protocol.remapper.PacketHandler;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.api.type.types.version.Types1_12;
@@ -145,7 +147,7 @@ public class EntityPacketRewriter1_13 extends LegacyEntityRewriter<ClientboundPa
                     }
                 });
 
-                // Rewrite entity type / metadata
+                // Rewrite entity type / ddata
                 handler(getMobSpawnRewriter1_11(Types1_12.ENTITY_DATA_LIST));
             }
         });
@@ -162,7 +164,7 @@ public class EntityPacketRewriter1_13 extends LegacyEntityRewriter<ClientboundPa
                 map(Types.BYTE);
                 map(Types1_13.ENTITY_DATA_LIST, Types1_12.ENTITY_DATA_LIST);
 
-                handler(getTrackerAndMetaHandler(Types1_12.ENTITY_DATA_LIST, EntityTypes1_13.EntityType.PLAYER));
+                handler(getTrackerAndDataHandler(Types1_12.ENTITY_DATA_LIST, EntityTypes1_13.EntityType.PLAYER));
             }
         });
 
@@ -172,7 +174,7 @@ public class EntityPacketRewriter1_13 extends LegacyEntityRewriter<ClientboundPa
                 map(Types.VAR_INT);
                 map(Types.UUID);
 
-                handler(getTrackerHandler(EntityTypes1_13.EntityType.PAINTING, Types.VAR_INT));
+                handler(getTrackerHandler(EntityTypes1_13.EntityType.PAINTING));
                 handler(wrapper -> {
                     int motive = wrapper.read(Types.VAR_INT);
                     String title = PaintingNames1_13.getStringId(motive);
@@ -188,10 +190,15 @@ public class EntityPacketRewriter1_13 extends LegacyEntityRewriter<ClientboundPa
             public void register() {
                 map(Types.INT); // 0 - Dimension ID
 
-                handler(getDimensionHandler(0));
                 handler(wrapper -> {
-                    wrapper.user().get(BackwardsBlockStorage.class).clear();
-                    wrapper.user().get(NoteBlockStorage.class).clear();
+                    ClientWorld clientWorld = wrapper.user().getClientWorld(Protocol1_13To1_12_2.class);
+                    int dimensionId = wrapper.get(Types.INT, 0);
+
+                    if (clientWorld.setEnvironment(dimensionId)) {
+                        tracker(wrapper.user()).clearEntities();
+                        wrapper.user().get(BackwardsBlockStorage.class).clear();
+                        wrapper.user().get(NoteBlockStorage.class).clear();
+                    }
                 });
             }
         });
@@ -230,20 +237,18 @@ public class EntityPacketRewriter1_13 extends LegacyEntityRewriter<ClientboundPa
             positionAndLook.send(Protocol1_13To1_12_2.class);
         });
 
-        if (ViaBackwards.getConfig().isFix1_13FacePlayer()) {
-            PacketHandlers movementRemapper = new PacketHandlers() {
-                @Override
-                public void register() {
-                    map(Types.DOUBLE);
-                    map(Types.DOUBLE);
-                    map(Types.DOUBLE);
-                    handler(wrapper -> wrapper.user().get(PlayerPositionStorage1_13.class).setCoordinates(wrapper, false));
-                }
-            };
-            protocol.registerServerbound(ServerboundPackets1_12_1.MOVE_PLAYER_POS, movementRemapper); // Player Position
-            protocol.registerServerbound(ServerboundPackets1_12_1.MOVE_PLAYER_POS_ROT, movementRemapper); // Player Position And Look (serverbound)
-            protocol.registerServerbound(ServerboundPackets1_12_1.MOVE_VEHICLE, movementRemapper); // Vehicle Move (serverbound)
-        }
+        PacketHandler movementRemapper = wrapper -> {
+            if (!ViaBackwards.getConfig().isFix1_13FacePlayer()) {
+                return;
+            }
+            final double x = wrapper.passthrough(Types.DOUBLE);
+            final double y = wrapper.passthrough(Types.DOUBLE);
+            final double z = wrapper.passthrough(Types.DOUBLE);
+            wrapper.user().get(PlayerPositionStorage1_13.class).setPosition(x, y, z);
+        };
+        protocol.registerServerbound(ServerboundPackets1_12_1.MOVE_PLAYER_POS, movementRemapper); // Player Position
+        protocol.registerServerbound(ServerboundPackets1_12_1.MOVE_PLAYER_POS_ROT, movementRemapper); // Player Position And Look (serverbound)
+        protocol.registerServerbound(ServerboundPackets1_12_1.MOVE_VEHICLE, movementRemapper); // Vehicle Move (serverbound)
     }
 
     @Override
@@ -258,7 +263,7 @@ public class EntityPacketRewriter1_13 extends LegacyEntityRewriter<ClientboundPa
         mapEntityTypeWithData(EntityTypes1_13.EntityType.TROPICAL_FISH, EntityTypes1_13.EntityType.SQUID).plainName();
 
         // Phantom
-        mapEntityTypeWithData(EntityTypes1_13.EntityType.PHANTOM, EntityTypes1_13.EntityType.PARROT).plainName().spawnMetadata(storage -> {
+        mapEntityTypeWithData(EntityTypes1_13.EntityType.PHANTOM, EntityTypes1_13.EntityType.PARROT).plainName().spawnEntityData(storage -> {
             // The phantom is grey/blue so let's do yellow/blue
             storage.add(new EntityData(15, EntityDataTypes1_12.VAR_INT, 3));
         });
@@ -269,32 +274,32 @@ public class EntityPacketRewriter1_13 extends LegacyEntityRewriter<ClientboundPa
         // Turtle
         mapEntityTypeWithData(EntityTypes1_13.EntityType.TURTLE, EntityTypes1_13.EntityType.OCELOT).plainName();
 
-        // Rewrite Meta types
-        filter().handler((event, meta) -> {
-            int typeId = meta.dataType().typeId();
+        // Rewrite Data types
+        filter().handler((event, data) -> {
+            int typeId = data.dataType().typeId();
             if (typeId == 4) {
-                JsonElement element = meta.value();
+                JsonElement element = data.value();
                 protocol.translatableRewriter().processText(event.user(), element);
-                meta.setDataType(EntityDataTypes1_12.COMPONENT);
+                data.setDataType(EntityDataTypes1_12.COMPONENT);
             } else if (typeId == 5) {
                 // Rewrite optional chat to string
-                JsonElement element = meta.value();
-                meta.setTypeAndValue(EntityDataTypes1_12.STRING, protocol.jsonToLegacy(event.user(), element));
+                JsonElement element = data.value();
+                data.setTypeAndValue(EntityDataTypes1_12.STRING, protocol.jsonToLegacy(event.user(), element));
             } else if (typeId == 6) {
-                Item item = (Item) meta.getValue();
-                meta.setTypeAndValue(EntityDataTypes1_12.ITEM, protocol.getItemRewriter().handleItemToClient(event.user(), item));
+                Item item = (Item) data.getValue();
+                data.setTypeAndValue(EntityDataTypes1_12.ITEM, protocol.getItemRewriter().handleItemToClient(event.user(), item));
             } else if (typeId == 15) {
                 // Discontinue particles
                 event.cancel();
             } else {
-                meta.setDataType(EntityDataTypes1_12.byId(typeId > 5 ? typeId - 1 : typeId));
+                data.setDataType(EntityDataTypes1_12.byId(typeId > 5 ? typeId - 1 : typeId));
             }
         });
 
-        // Handle zombie metadata
+        // Handle zombie entity data
         filter().type(EntityTypes1_13.EntityType.ZOMBIE).removeIndex(15);
 
-        // Handle turtle metadata (Remove them all for now)
+        // Handle turtle entity data (Remove them all for now)
         filter().type(EntityTypes1_13.EntityType.TURTLE).cancel(13); // Home pos
         filter().type(EntityTypes1_13.EntityType.TURTLE).cancel(14); // Has egg
         filter().type(EntityTypes1_13.EntityType.TURTLE).cancel(15); // Laying egg
@@ -302,7 +307,7 @@ public class EntityPacketRewriter1_13 extends LegacyEntityRewriter<ClientboundPa
         filter().type(EntityTypes1_13.EntityType.TURTLE).cancel(17); // Going home
         filter().type(EntityTypes1_13.EntityType.TURTLE).cancel(18); // Traveling
 
-        // Remove additional fish meta
+        // Remove additional fish data
         filter().type(EntityTypes1_13.EntityType.ABSTRACT_FISH).cancel(12);
         filter().type(EntityTypes1_13.EntityType.ABSTRACT_FISH).cancel(13);
 
@@ -316,21 +321,21 @@ public class EntityPacketRewriter1_13 extends LegacyEntityRewriter<ClientboundPa
         filter().type(EntityTypes1_13.EntityType.TRIDENT).cancel(7);
 
         // Handle new wolf colors
-        filter().type(EntityTypes1_13.EntityType.WOLF).index(17).handler((event, meta) -> {
-            meta.setValue(15 - (int) meta.getValue());
+        filter().type(EntityTypes1_13.EntityType.WOLF).index(17).handler((event, data) -> {
+            data.setValue(15 - (int) data.getValue());
         });
 
         // Rewrite AreaEffectCloud
-        filter().type(EntityTypes1_13.EntityType.AREA_EFFECT_CLOUD).index(9).handler((event, meta) -> {
-            Particle particle = (Particle) meta.getValue();
+        filter().type(EntityTypes1_13.EntityType.AREA_EFFECT_CLOUD).index(9).handler((event, data) -> {
+            Particle particle = (Particle) data.getValue();
 
-            ParticleIdMappings1_12_2.ParticleData data = ParticleIdMappings1_12_2.getMapping(particle.id());
+            ParticleIdMappings1_12_2.ParticleData particleData = ParticleIdMappings1_12_2.getMapping(particle.id());
 
             int firstArg = 0;
             int secondArg = 0;
-            int[] particleArgs = data.rewriteMeta(protocol, particle.getArguments());
+            int[] particleArgs = particleData.rewriteMeta(protocol, particle.getArguments());
             if (particleArgs != null && particleArgs.length != 0) {
-                if (data.getHandler().isBlockHandler() && particleArgs[0] == 0) {
+                if (particleData.getHandler().isBlockHandler() && particleArgs[0] == 0) {
                     // Air doesn't have a break particle for sub 1.13 clients -> glass pane
                     particleArgs[0] = 102;
                 }
@@ -339,7 +344,7 @@ public class EntityPacketRewriter1_13 extends LegacyEntityRewriter<ClientboundPa
                 secondArg = particleArgs.length == 2 ? particleArgs[1] : 0;
             }
 
-            event.createExtraData(new EntityData(9, EntityDataTypes1_12.VAR_INT, data.getHistoryId()));
+            event.createExtraData(new EntityData(9, EntityDataTypes1_12.VAR_INT, particleData.getHistoryId()));
             event.createExtraData(new EntityData(10, EntityDataTypes1_12.VAR_INT, firstArg));
             event.createExtraData(new EntityData(11, EntityDataTypes1_12.VAR_INT, secondArg));
 

common/src/main/java/com/viaversion/viabackwards/protocol/v1_13to1_12_2/rewriter/PlayerPacketRewriter1_13.java

@@ -469,7 +469,7 @@ public class PlayerPacketRewriter1_13 extends RewriterBase<Protocol1_13To1_12_2>
                     wrapper.write(Types.STRING, newChannel);
 
                     if (newChannel.equals("minecraft:register") || newChannel.equals("minecraft:unregister")) {
-                        String[] channels = new String(wrapper.read(Types.REMAINING_BYTES), StandardCharsets.UTF_8).split("\0");
+                        String[] channels = new String(wrapper.read(Types.SERVERBOUND_CUSTOM_PAYLOAD_DATA), StandardCharsets.UTF_8).split("\0");
                         List<String> rewrittenChannels = new ArrayList<>();
                         for (String s : channels) {
                             String rewritten = ItemPacketRewriter1_13.getNewPluginChannelId(s);
@@ -480,7 +480,7 @@ public class PlayerPacketRewriter1_13 extends RewriterBase<Protocol1_13To1_12_2>
                             }
                         }
                         if (!rewrittenChannels.isEmpty()) {
-                            wrapper.write(Types.REMAINING_BYTES, Joiner.on('\0').join(rewrittenChannels).getBytes(StandardCharsets.UTF_8));
+                            wrapper.write(Types.SERVERBOUND_CUSTOM_PAYLOAD_DATA, Joiner.on('\0').join(rewrittenChannels).getBytes(StandardCharsets.UTF_8));
                         } else {
                             wrapper.cancel();
                         }

common/src/main/java/com/viaversion/viabackwards/protocol/v1_14_1to1_14/rewriter/EntityPacketRewriter1_14_1.java

@@ -70,7 +70,7 @@ public class EntityPacketRewriter1_14_1 extends LegacyEntityRewriter<Clientbound
                 map(Types.SHORT); // 9 - Velocity X
                 map(Types.SHORT); // 10 - Velocity Y
                 map(Types.SHORT); // 11 - Velocity Z
-                map(Types1_14.ENTITY_DATA_LIST); // 12 - Metadata
+                map(Types1_14.ENTITY_DATA_LIST); // 12 - Entity data
 
                 handler(wrapper -> {
                     int entityId = wrapper.get(Types.VAR_INT, 0);
@@ -79,13 +79,13 @@ public class EntityPacketRewriter1_14_1 extends LegacyEntityRewriter<Clientbound
                     // Register Type ID
                     tracker(wrapper.user()).addEntity(entityId, EntityTypes1_14.getTypeFromId(type));
 
-                    List<EntityData> metadata = wrapper.get(Types1_14.ENTITY_DATA_LIST, 0);
-                    handleEntityData(entityId, metadata, wrapper.user());
+                    List<EntityData> entityDataList = wrapper.get(Types1_14.ENTITY_DATA_LIST, 0);
+                    handleEntityData(entityId, entityDataList, wrapper.user());
                 });
             }
         });
 
-        // Entity Metadata
+        // Entity data
         registerSetEntityData(ClientboundPackets1_14.SET_ENTITY_DATA, Types1_14.ENTITY_DATA_LIST);
     }
 

common/src/main/java/com/viaversion/viabackwards/protocol/v1_14to1_13_2/Protocol1_14To1_13_2.java

@@ -20,8 +20,8 @@ package com.viaversion.viabackwards.protocol.v1_14to1_13_2;
 import com.viaversion.viabackwards.api.BackwardsProtocol;
 import com.viaversion.viabackwards.api.data.BackwardsMappingData;
 import com.viaversion.viabackwards.api.rewriters.TranslatableRewriter;
-import com.viaversion.viabackwards.protocol.v1_14to1_13_2.rewriter.CommandRewriter1_14;
 import com.viaversion.viabackwards.protocol.v1_14to1_13_2.rewriter.BlockItemPacketRewriter1_14;
+import com.viaversion.viabackwards.protocol.v1_14to1_13_2.rewriter.CommandRewriter1_14;
 import com.viaversion.viabackwards.protocol.v1_14to1_13_2.rewriter.EntityPacketRewriter1_14;
 import com.viaversion.viabackwards.protocol.v1_14to1_13_2.rewriter.PlayerPacketRewriter1_14;
 import com.viaversion.viabackwards.protocol.v1_14to1_13_2.rewriter.SoundPacketRewriter1_14;
@@ -38,6 +38,7 @@ import com.viaversion.viaversion.protocols.v1_13_2to1_14.Protocol1_13_2To1_14;
 import com.viaversion.viaversion.protocols.v1_13_2to1_14.packet.ClientboundPackets1_14;
 import com.viaversion.viaversion.protocols.v1_13_2to1_14.packet.ServerboundPackets1_14;
 import com.viaversion.viaversion.rewriter.ComponentRewriter;
+import com.viaversion.viaversion.rewriter.ParticleRewriter;
 import com.viaversion.viaversion.rewriter.StatisticsRewriter;
 
 public class Protocol1_14To1_13_2 extends BackwardsProtocol<ClientboundPackets1_14, ClientboundPackets1_13, ServerboundPackets1_14, ServerboundPackets1_13> {
@@ -45,6 +46,7 @@ public class Protocol1_14To1_13_2 extends BackwardsProtocol<ClientboundPackets1_
     public static final BackwardsMappingData MAPPINGS = new BackwardsMappingData("1.14", "1.13.2", Protocol1_13_2To1_14.class);
     private final EntityPacketRewriter1_14 entityRewriter = new EntityPacketRewriter1_14(this);
     private final BlockItemPacketRewriter1_14 itemRewriter = new BlockItemPacketRewriter1_14(this);
+    private final ParticleRewriter<ClientboundPackets1_14> particleRewriter = new ParticleRewriter<>(this);
     private final TranslatableRewriter<ClientboundPackets1_14> translatableRewriter = new TranslatableRewriter<>(this, ComponentRewriter.ReadType.JSON);
 
     public Protocol1_14To1_13_2() {
@@ -63,6 +65,8 @@ public class Protocol1_14To1_13_2 extends BackwardsProtocol<ClientboundPackets1_
         translatableRewriter.registerTitle(ClientboundPackets1_14.SET_TITLES);
         translatableRewriter.registerPing();
 
+        particleRewriter.registerLevelParticles1_13(ClientboundPackets1_14.LEVEL_PARTICLES, Types.FLOAT);
+
         new CommandRewriter1_14(this).registerDeclareCommands(ClientboundPackets1_14.COMMANDS);
         new PlayerPacketRewriter1_14(this).register();
         new SoundPacketRewriter1_14(this).register();
@@ -162,11 +166,8 @@ public class Protocol1_14To1_13_2 extends BackwardsProtocol<ClientboundPackets1_
 
     @Override
     public void init(UserConnection user) {
-        if (!user.has(ClientWorld.class)) {
-            user.put(new ClientWorld());
-        }
-
         user.addEntityTracker(this.getClass(), new EntityTrackerBase(user, EntityTypes1_14.PLAYER));
+        user.addClientWorld(this.getClass(), new ClientWorld());
 
         if (!user.has(ChunkLightStorage.class)) {
             user.put(new ChunkLightStorage());
@@ -190,6 +191,11 @@ public class Protocol1_14To1_13_2 extends BackwardsProtocol<ClientboundPackets1_
         return itemRewriter;
     }
 
+    @Override
+    public ParticleRewriter<ClientboundPackets1_14> getParticleRewriter() {
+        return particleRewriter;
+    }
+
     @Override
     public TranslatableRewriter<ClientboundPackets1_14> getComponentRewriter() {
         return translatableRewriter;

common/src/main/java/com/viaversion/viabackwards/protocol/v1_14to1_13_2/rewriter/BlockItemPacketRewriter1_14.java

@@ -18,8 +18,12 @@
 package com.viaversion.viabackwards.protocol.v1_14to1_13_2.rewriter;
 
 import com.google.common.collect.ImmutableSet;
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.nbt.tag.ListTag;
+import com.viaversion.nbt.tag.StringTag;
 import com.viaversion.viabackwards.api.rewriters.BackwardsItemRewriter;
 import com.viaversion.viabackwards.api.rewriters.EnchantmentRewriter;
+import com.viaversion.viabackwards.api.rewriters.TranslatableRewriter;
 import com.viaversion.viabackwards.protocol.v1_14to1_13_2.Protocol1_14To1_13_2;
 import com.viaversion.viabackwards.protocol.v1_14to1_13_2.storage.ChunkLightStorage;
 import com.viaversion.viaversion.api.Via;
@@ -34,8 +38,8 @@ import com.viaversion.viaversion.api.minecraft.chunks.DataPalette;
 import com.viaversion.viaversion.api.minecraft.chunks.PaletteType;
 import com.viaversion.viaversion.api.minecraft.entities.EntityType;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_14;
-import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.minecraft.entitydata.EntityData;
+import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.api.type.types.chunk.ChunkType1_13;
@@ -44,10 +48,9 @@ import com.viaversion.viaversion.api.type.types.version.Types1_13;
 import com.viaversion.viaversion.api.type.types.version.Types1_13_2;
 import com.viaversion.viaversion.libs.gson.JsonElement;
 import com.viaversion.viaversion.libs.gson.JsonObject;
-import com.viaversion.nbt.tag.CompoundTag;
-import com.viaversion.nbt.tag.ListTag;
-import com.viaversion.nbt.tag.StringTag;
 import com.viaversion.viaversion.libs.gson.JsonParseException;
+import com.viaversion.viaversion.libs.mcstructs.text.utils.TextUtils;
+import com.viaversion.viaversion.protocols.v1_12_2to1_13.Protocol1_12_2To1_13;
 import com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPackets1_13;
 import com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ServerboundPackets1_13;
 import com.viaversion.viaversion.protocols.v1_13_2to1_14.Protocol1_13_2To1_14;
@@ -239,9 +242,9 @@ public class BlockItemPacketRewriter1_14 extends BackwardsItemRewriter<Clientbou
                             wrapper.cancel();
                             return;
                         }
-                        List<EntityData> metadataList = new ArrayList<>();
-                        metadataList.add(new EntityData(16, Types1_13_2.ENTITY_DATA_TYPES.varIntType, armorType));
-                        wrapper.write(Types1_13.ENTITY_DATA_LIST, metadataList);
+                        List<EntityData> entityDataList = new ArrayList<>();
+                        entityDataList.add(new EntityData(16, Types1_13_2.ENTITY_DATA_TYPES.varIntType, armorType));
+                        wrapper.write(Types1_13.ENTITY_DATA_LIST, entityDataList);
                     }
                 });
             }
@@ -357,7 +360,7 @@ public class BlockItemPacketRewriter1_14 extends BackwardsItemRewriter<Clientbou
         });
 
         protocol.registerClientbound(ClientboundPackets1_14.LEVEL_CHUNK, wrapper -> {
-            ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
+            ClientWorld clientWorld = wrapper.user().getClientWorld(Protocol1_14To1_13_2.class);
             Chunk chunk = wrapper.read(ChunkType1_14.TYPE);
             wrapper.write(ChunkType1_13.forEnvironment(clientWorld.getEnvironment()), chunk);
 
@@ -366,7 +369,7 @@ public class BlockItemPacketRewriter1_14 extends BackwardsItemRewriter<Clientbou
                 ChunkSection section = chunk.getSections()[i];
                 if (section == null) continue;
 
-                ChunkSectionLight sectionLight = new ChunkSectionLightImpl();
+                ChunkSectionLight sectionLight = ChunkSectionLightImpl.createWithBlockLight();
                 section.setLight(sectionLight);
                 if (chunkLight == null) {
                     sectionLight.setBlockLight(ChunkLightStorage.FULL_LIGHT);
@@ -427,8 +430,6 @@ public class BlockItemPacketRewriter1_14 extends BackwardsItemRewriter<Clientbou
             }
         });
 
-        registerLevelParticles(ClientboundPackets1_14.LEVEL_PARTICLES, Types.FLOAT);
-
         protocol.registerClientbound(ClientboundPackets1_14.MAP_ITEM_DATA, new PacketHandlers() {
             @Override
             public void register() {
@@ -477,6 +478,8 @@ public class BlockItemPacketRewriter1_14 extends BackwardsItemRewriter<Clientbou
                             each.remove();
                             continue;
                         }
+                        TextUtils.setTranslator(component, s -> Protocol1_12_2To1_13.MAPPINGS.getMojangTranslation().
+                            getOrDefault(s, TranslatableRewriter.getTranslatableMappings("1.14").get(s)));
                         loreEntry.setValue(component.asLegacyFormatString());
                     }
                 } catch (final JsonParseException e) {

common/src/main/java/com/viaversion/viabackwards/protocol/v1_14to1_13_2/rewriter/EntityPacketRewriter1_14.java

@@ -17,17 +17,17 @@
  */
 package com.viaversion.viabackwards.protocol.v1_14to1_13_2.rewriter;
 
-import com.viaversion.viabackwards.api.entities.storage.EntityReplacement;
 import com.viaversion.viabackwards.api.entities.storage.EntityPositionHandler;
+import com.viaversion.viabackwards.api.entities.storage.EntityReplacement;
 import com.viaversion.viabackwards.api.rewriters.LegacyEntityRewriter;
 import com.viaversion.viabackwards.protocol.v1_14to1_13_2.Protocol1_14To1_13_2;
 import com.viaversion.viabackwards.protocol.v1_14to1_13_2.storage.ChunkLightStorage;
 import com.viaversion.viabackwards.protocol.v1_14to1_13_2.storage.DifficultyStorage;
 import com.viaversion.viabackwards.protocol.v1_14to1_13_2.storage.EntityPositionStorage1_14;
 import com.viaversion.viaversion.api.data.entity.EntityTracker;
+import com.viaversion.viaversion.api.minecraft.BlockPosition;
 import com.viaversion.viaversion.api.minecraft.ClientWorld;
 import com.viaversion.viaversion.api.minecraft.Particle;
-import com.viaversion.viaversion.api.minecraft.BlockPosition;
 import com.viaversion.viaversion.api.minecraft.VillagerData;
 import com.viaversion.viaversion.api.minecraft.entities.EntityType;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_13;
@@ -153,6 +153,27 @@ public class EntityPacketRewriter1_14 extends LegacyEntityRewriter<ClientboundPa
                         };
                         if (data != 0)
                             wrapper.set(Types.INT, 0, data);
+                    } else if (entityType.is(EntityTypes1_13.EntityType.EXPERIENCE_ORB)) {
+                        // Newer clients can spawn experience orbs via add entity, map to add experience orb and override values via multiple packets
+                        wrapper.cancel();
+                        final int entityId = wrapper.get(Types.VAR_INT, 0);
+
+                        // Shrug about uuid or rotations
+                        final PacketWrapper addExperienceOrb = PacketWrapper.create(ClientboundPackets1_13.ADD_EXPERIENCE_ORB, wrapper.user());
+                        addExperienceOrb.write(Types.VAR_INT, entityId); // Entity id
+                        addExperienceOrb.write(Types.DOUBLE, wrapper.get(Types.DOUBLE, 0)); // X
+                        addExperienceOrb.write(Types.DOUBLE, wrapper.get(Types.DOUBLE, 1)); // Y
+                        addExperienceOrb.write(Types.DOUBLE, wrapper.get(Types.DOUBLE, 2)); // Z
+                        addExperienceOrb.write(Types.SHORT, (short) 0); // Experience count
+                        addExperienceOrb.send(Protocol1_14To1_13_2.class);
+
+                        final PacketWrapper setEntityMotion = PacketWrapper.create(ClientboundPackets1_13.SET_ENTITY_MOTION, wrapper.user());
+                        setEntityMotion.write(Types.VAR_INT, entityId); // Entity id
+                        setEntityMotion.write(Types.SHORT, wrapper.get(Types.SHORT, 0));
+                        setEntityMotion.write(Types.SHORT, wrapper.get(Types.SHORT, 1));
+                        setEntityMotion.write(Types.SHORT, wrapper.get(Types.SHORT, 2));
+                        setEntityMotion.send(Protocol1_14To1_13_2.class);
+                        return;
                     } else {
                         for (final EntityTypes1_13.ObjectType type : EntityTypes1_13.ObjectType.values()) {
                             if (type.getType() == entityType) {
@@ -193,7 +214,7 @@ public class EntityPacketRewriter1_14 extends LegacyEntityRewriter<ClientboundPa
                 map(Types.SHORT); // 9 - Velocity X
                 map(Types.SHORT); // 10 - Velocity Y
                 map(Types.SHORT); // 11 - Velocity Z
-                map(Types1_14.ENTITY_DATA_LIST, Types1_13_2.ENTITY_DATA_LIST); // 12 - Metadata
+                map(Types1_14.ENTITY_DATA_LIST, Types1_13_2.ENTITY_DATA_LIST); // 12 - Entity data
 
                 handler(wrapper -> {
                     int type = wrapper.get(Types.VAR_INT, 1);
@@ -214,7 +235,7 @@ public class EntityPacketRewriter1_14 extends LegacyEntityRewriter<ClientboundPa
                     }
                 });
 
-                // Handle entity type & metadata
+                // Handle entity type & data
                 handler(getMobSpawnRewriter1_11(Types1_13_2.ENTITY_DATA_LIST));
             }
         });
@@ -266,9 +287,9 @@ public class EntityPacketRewriter1_14 extends LegacyEntityRewriter<ClientboundPa
                 map(Types.DOUBLE); // 4 - Z
                 map(Types.BYTE); // 5 - Yaw
                 map(Types.BYTE); // 6 - Pitch
-                map(Types1_14.ENTITY_DATA_LIST, Types1_13_2.ENTITY_DATA_LIST); // 7 - Metadata
+                map(Types1_14.ENTITY_DATA_LIST, Types1_13_2.ENTITY_DATA_LIST); // 7 - Entity data
 
-                handler(getTrackerAndMetaHandler(Types1_13_2.ENTITY_DATA_LIST, EntityTypes1_14.PLAYER));
+                handler(getTrackerAndDataHandler(Types1_13_2.ENTITY_DATA_LIST, EntityTypes1_14.PLAYER));
                 handler(wrapper -> positionHandler.cacheEntityPosition(wrapper, true, false));
             }
         });
@@ -283,8 +304,8 @@ public class EntityPacketRewriter1_14 extends LegacyEntityRewriter<ClientboundPa
                 map(Types.UNSIGNED_BYTE); // 1 - Gamemode
                 map(Types.INT); // 2 - Dimension
 
-                handler(getTrackerHandler(EntityTypes1_14.PLAYER, Types.INT));
                 handler(getDimensionHandler(1));
+                handler(getPlayerTrackerHandler());
                 handler(wrapper -> {
                     short difficulty = wrapper.user().get(DifficultyStorage.class).getDifficulty();
                     wrapper.write(Types.UNSIGNED_BYTE, difficulty);
@@ -308,14 +329,16 @@ public class EntityPacketRewriter1_14 extends LegacyEntityRewriter<ClientboundPa
                 map(Types.INT); // 0 - Dimension ID
 
                 handler(wrapper -> {
-                    ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
+                    ClientWorld clientWorld = wrapper.user().getClientWorld(Protocol1_14To1_13_2.class);
                     int dimensionId = wrapper.get(Types.INT, 0);
-                    clientWorld.setEnvironment(dimensionId);
+
+                    if (clientWorld.setEnvironment(dimensionId)) {
+                        tracker(wrapper.user()).clearEntities();
+                        wrapper.user().get(ChunkLightStorage.class).clear();
+                    }
 
                     short difficulty = wrapper.user().get(DifficultyStorage.class).getDifficulty();
                     wrapper.write(Types.UNSIGNED_BYTE, difficulty);
-
-                    wrapper.user().get(ChunkLightStorage.class).clear();
                 });
             }
         });
@@ -323,14 +346,14 @@ public class EntityPacketRewriter1_14 extends LegacyEntityRewriter<ClientboundPa
 
     @Override
     protected void registerRewrites() {
-        filter().handler((event, meta) -> {
-            int typeId = meta.dataType().typeId();
+        filter().handler((event, data) -> {
+            int typeId = data.dataType().typeId();
             if (typeId <= 15) {
-                meta.setDataType(Types1_13_2.ENTITY_DATA_TYPES.byId(typeId));
+                data.setDataType(Types1_13_2.ENTITY_DATA_TYPES.byId(typeId));
             }
         });
 
-        registerMetaTypeHandler(Types1_13_2.ENTITY_DATA_TYPES.itemType, null, Types1_13_2.ENTITY_DATA_TYPES.optionalBlockStateType, null,
+        registerEntityDataTypeHandler(Types1_13_2.ENTITY_DATA_TYPES.itemType, null, Types1_13_2.ENTITY_DATA_TYPES.optionalBlockStateType, null,
             Types1_13_2.ENTITY_DATA_TYPES.componentType, Types1_13_2.ENTITY_DATA_TYPES.optionalComponentType);
 
         filter().type(EntityTypes1_14.PILLAGER).cancel(15);
@@ -353,15 +376,15 @@ public class EntityPacketRewriter1_14 extends LegacyEntityRewriter<ClientboundPa
 
         filter().type(EntityTypes1_14.ABSTRACT_RAIDER).removeIndex(14); // Celebrating
 
-        filter().type(EntityTypes1_14.AREA_EFFECT_CLOUD).index(10).handler((event, meta) -> {
-            rewriteParticle(event.user(), (Particle) meta.getValue());
+        filter().type(EntityTypes1_14.AREA_EFFECT_CLOUD).index(10).handler((event, data) -> {
+            protocol.getParticleRewriter().rewriteParticle(event.user(), (Particle) data.getValue());
         });
 
-        filter().type(EntityTypes1_14.FIREWORK_ROCKET).index(8).handler((event, meta) -> {
-            meta.setDataType(Types1_13_2.ENTITY_DATA_TYPES.varIntType);
-            Integer value = (Integer) meta.getValue();
+        filter().type(EntityTypes1_14.FIREWORK_ROCKET).index(8).handler((event, data) -> {
+            data.setDataType(Types1_13_2.ENTITY_DATA_TYPES.varIntType);
+            Integer value = (Integer) data.getValue();
             if (value == null) {
-                meta.setValue(0);
+                data.setValue(0);
             }
         });
 
@@ -369,10 +392,10 @@ public class EntityPacketRewriter1_14 extends LegacyEntityRewriter<ClientboundPa
 
         filter().type(EntityTypes1_14.VILLAGER).cancel(15); // Head shake timer
 
-        EntityDataHandler villagerDataHandler = (event, meta) -> {
-            VillagerData villagerData = (VillagerData) meta.getValue();
-            meta.setTypeAndValue(Types1_13_2.ENTITY_DATA_TYPES.varIntType, villagerDataToProfession(villagerData));
-            if (meta.id() == 16) {
+        EntityDataHandler villagerDataHandler = (event, data) -> {
+            VillagerData villagerData = (VillagerData) data.getValue();
+            data.setTypeAndValue(Types1_13_2.ENTITY_DATA_TYPES.varIntType, villagerDataToProfession(villagerData));
+            if (data.id() == 16) {
                 event.setIndex(15); // decreased by 2 again in one of the following handlers
             }
         };
@@ -381,14 +404,14 @@ public class EntityPacketRewriter1_14 extends LegacyEntityRewriter<ClientboundPa
         filter().type(EntityTypes1_14.VILLAGER).index(16).handler(villagerDataHandler);
 
         // Holding arms up - from bitfield into own boolean
-        filter().type(EntityTypes1_14.ABSTRACT_SKELETON).index(13).handler((event, meta) -> {
-            byte value = (byte) meta.getValue();
+        filter().type(EntityTypes1_14.ABSTRACT_SKELETON).index(13).handler((event, data) -> {
+            byte value = (byte) data.getValue();
             if ((value & 4) != 0) {
                 event.createExtraData(new EntityData(14, Types1_13_2.ENTITY_DATA_TYPES.booleanType, true));
             }
         });
-        filter().type(EntityTypes1_14.ZOMBIE).index(13).handler((event, meta) -> {
-            byte value = (byte) meta.getValue();
+        filter().type(EntityTypes1_14.ZOMBIE).index(13).handler((event, data) -> {
+            byte value = (byte) data.getValue();
             if ((value & 4) != 0) {
                 event.createExtraData(new EntityData(16, Types1_13_2.ENTITY_DATA_TYPES.booleanType, true));
             }
@@ -397,10 +420,10 @@ public class EntityPacketRewriter1_14 extends LegacyEntityRewriter<ClientboundPa
         filter().type(EntityTypes1_14.ZOMBIE).addIndex(16);
 
         // Remove bed location
-        filter().type(EntityTypes1_14.LIVING_ENTITY).handler((event, meta) -> {
+        filter().type(EntityTypes1_14.LIVING_ENTITY).handler((event, data) -> {
             int index = event.index();
             if (index == 12) {
-                BlockPosition position = (BlockPosition) meta.getValue();
+                BlockPosition position = (BlockPosition) data.getValue();
                 if (position != null) {
                     // Use bed
                     PacketWrapper wrapper = PacketWrapper.create(ClientboundPackets1_13.PLAYER_SLEEP, null, event.user());
@@ -423,22 +446,22 @@ public class EntityPacketRewriter1_14 extends LegacyEntityRewriter<ClientboundPa
         // Pose
         filter().removeIndex(6);
 
-        filter().type(EntityTypes1_14.OCELOT).index(13).handler((event, meta) -> {
+        filter().type(EntityTypes1_14.OCELOT).index(13).handler((event, data) -> {
             event.setIndex(15);
-            meta.setTypeAndValue(Types1_13_2.ENTITY_DATA_TYPES.varIntType, 0);
+            data.setTypeAndValue(Types1_13_2.ENTITY_DATA_TYPES.varIntType, 0);
         });
 
-        filter().type(EntityTypes1_14.CAT).handler((event, meta) -> {
+        filter().type(EntityTypes1_14.CAT).handler((event, data) -> {
             if (event.index() == 15) {
-                meta.setValue(1);
+                data.setValue(1);
             } else if (event.index() == 13) {
-                meta.setValue((byte) ((byte) meta.getValue() & 0x4));
+                data.setValue((byte) ((byte) data.getValue() & 0x4));
             }
         });
 
-        filter().handler((event, meta) -> {
-            if (meta.dataType().typeId() > 15) {
-                throw new IllegalArgumentException("Unhandled metadata: " + meta);
+        filter().handler((event, data) -> {
+            if (data.dataType().typeId() > 15) {
+                throw new IllegalArgumentException("Unhandled entity data: " + data);
             }
         });
     }

common/src/main/java/com/viaversion/viabackwards/protocol/v1_15to1_14_4/Protocol1_15To1_14_4.java

@@ -21,10 +21,11 @@ import com.viaversion.viabackwards.api.BackwardsProtocol;
 import com.viaversion.viabackwards.api.data.BackwardsMappingData;
 import com.viaversion.viabackwards.api.rewriters.SoundRewriter;
 import com.viaversion.viabackwards.api.rewriters.TranslatableRewriter;
-import com.viaversion.viabackwards.protocol.v1_15to1_14_4.storage.ImmediateRespawnStorage;
 import com.viaversion.viabackwards.protocol.v1_15to1_14_4.rewriter.BlockItemPacketRewriter1_15;
 import com.viaversion.viabackwards.protocol.v1_15to1_14_4.rewriter.EntityPacketRewriter1_15;
+import com.viaversion.viabackwards.protocol.v1_15to1_14_4.storage.ImmediateRespawnStorage;
 import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.minecraft.ClientWorld;
 import com.viaversion.viaversion.api.minecraft.RegistryType;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_15;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
@@ -36,6 +37,7 @@ import com.viaversion.viaversion.protocols.v1_14_3to1_14_4.packet.ClientboundPac
 import com.viaversion.viaversion.protocols.v1_14_4to1_15.Protocol1_14_4To1_15;
 import com.viaversion.viaversion.protocols.v1_14_4to1_15.packet.ClientboundPackets1_15;
 import com.viaversion.viaversion.rewriter.ComponentRewriter;
+import com.viaversion.viaversion.rewriter.ParticleRewriter;
 import com.viaversion.viaversion.rewriter.StatisticsRewriter;
 import com.viaversion.viaversion.rewriter.TagRewriter;
 
@@ -44,6 +46,7 @@ public class Protocol1_15To1_14_4 extends BackwardsProtocol<ClientboundPackets1_
     public static final BackwardsMappingData MAPPINGS = new BackwardsMappingData("1.15", "1.14", Protocol1_14_4To1_15.class);
     private final EntityPacketRewriter1_15 entityRewriter = new EntityPacketRewriter1_15(this);
     private final BlockItemPacketRewriter1_15 blockItemPackets = new BlockItemPacketRewriter1_15(this);
+    private final ParticleRewriter<ClientboundPackets1_15> particleRewriter = new ParticleRewriter<>(this);
     private final TranslatableRewriter<ClientboundPackets1_15> translatableRewriter = new TranslatableRewriter<>(this, ComponentRewriter.ReadType.JSON);
     private final TagRewriter<ClientboundPackets1_15> tagRewriter = new TagRewriter<>(this);
 
@@ -102,8 +105,10 @@ public class Protocol1_15To1_14_4 extends BackwardsProtocol<ClientboundPackets1_
 
     @Override
     public void init(UserConnection user) {
-        user.put(new ImmediateRespawnStorage());
         user.addEntityTracker(getClass(), new EntityTrackerBase(user, EntityTypes1_15.PLAYER));
+        user.addClientWorld(getClass(), new ClientWorld());
+
+        user.put(new ImmediateRespawnStorage());
     }
 
     @Override
@@ -121,6 +126,11 @@ public class Protocol1_15To1_14_4 extends BackwardsProtocol<ClientboundPackets1_
         return blockItemPackets;
     }
 
+    @Override
+    public ParticleRewriter<ClientboundPackets1_15> getParticleRewriter() {
+        return particleRewriter;
+    }
+
     @Override
     public TagRewriter<ClientboundPackets1_15> getTagRewriter() {
         return tagRewriter;

common/src/main/java/com/viaversion/viabackwards/protocol/v1_15to1_14_4/rewriter/EntityPacketRewriter1_15.java

@@ -21,7 +21,6 @@ import com.viaversion.viabackwards.api.rewriters.EntityRewriter;
 import com.viaversion.viabackwards.protocol.v1_15to1_14_4.Protocol1_15To1_14_4;
 import com.viaversion.viabackwards.protocol.v1_15to1_14_4.storage.ImmediateRespawnStorage;
 import com.viaversion.viaversion.api.minecraft.entities.EntityType;
-import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_14;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_15;
 import com.viaversion.viaversion.api.minecraft.entitydata.EntityData;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
@@ -81,7 +80,7 @@ public class EntityPacketRewriter1_15 extends EntityRewriter<ClientboundPackets1
                 map(Types.SHORT); // 9 - Velocity X
                 map(Types.SHORT); // 10 - Velocity Y
                 map(Types.SHORT); // 11 - Velocity Z
-                handler(wrapper -> wrapper.write(Types1_14.ENTITY_DATA_LIST, new ArrayList<>())); // Metadata is no longer sent in 1.15, so we have to send an empty one
+                handler(wrapper -> wrapper.write(Types1_14.ENTITY_DATA_LIST, new ArrayList<>())); // Entity data is no longer sent in 1.15, so we have to send an empty one
 
                 handler(wrapper -> {
                     int type = wrapper.get(Types.VAR_INT, 1);
@@ -97,6 +96,7 @@ public class EntityPacketRewriter1_15 extends EntityRewriter<ClientboundPackets1
             public void register() {
                 map(Types.INT);
                 read(Types.LONG); // Seed
+                handler(getDimensionHandler(0));
             }
         });
 
@@ -114,7 +114,7 @@ public class EntityPacketRewriter1_15 extends EntityRewriter<ClientboundPackets1
                 map(Types.VAR_INT); // 5 - View Distance
                 map(Types.BOOLEAN); // 6 - Reduce Debug Info
 
-                handler(getTrackerHandler(EntityTypes1_15.PLAYER, Types.INT));
+                handler(getPlayerTrackerHandler());
 
                 handler(wrapper -> {
                     boolean immediateRespawn = !wrapper.read(Types.BOOLEAN); // Inverted
@@ -137,9 +137,9 @@ public class EntityPacketRewriter1_15 extends EntityRewriter<ClientboundPackets1
                 map(Types.DOUBLE); // 4 - Z
                 map(Types.BYTE); // 5 - Yaw
                 map(Types.BYTE); // 6 - Pitch
-                handler(wrapper -> wrapper.write(Types1_14.ENTITY_DATA_LIST, new ArrayList<>())); // Metadata is no longer sent in 1.15, so we have to send an empty one
+                handler(wrapper -> wrapper.write(Types1_14.ENTITY_DATA_LIST, new ArrayList<>())); // Entity data is no longer sent in 1.15, so we have to send an empty one
 
-                handler(getTrackerHandler(EntityTypes1_15.PLAYER, Types.VAR_INT));
+                handler(getTrackerHandler(EntityTypes1_15.PLAYER));
             }
         });
 
@@ -192,7 +192,7 @@ public class EntityPacketRewriter1_15 extends EntityRewriter<ClientboundPackets1
 
     @Override
     protected void registerRewrites() {
-        registerMetaTypeHandler(Types1_14.ENTITY_DATA_TYPES.itemType, null, Types1_14.ENTITY_DATA_TYPES.optionalBlockStateType, Types1_14.ENTITY_DATA_TYPES.particleType,
+        registerEntityDataTypeHandler(Types1_14.ENTITY_DATA_TYPES.itemType, null, Types1_14.ENTITY_DATA_TYPES.optionalBlockStateType, Types1_14.ENTITY_DATA_TYPES.particleType,
             Types1_14.ENTITY_DATA_TYPES.componentType, Types1_14.ENTITY_DATA_TYPES.optionalComponentType);
 
         filter().type(EntityTypes1_15.LIVING_ENTITY).removeIndex(12);
@@ -200,29 +200,28 @@ public class EntityPacketRewriter1_15 extends EntityRewriter<ClientboundPackets1
         filter().type(EntityTypes1_15.BEE).cancel(15);
         filter().type(EntityTypes1_15.BEE).cancel(16);
 
-        mapEntityTypeWithData(EntityTypes1_15.BEE, EntityTypes1_15.PUFFERFISH).jsonName().spawnMetadata(storage -> {
-            storage.add(new EntityData(14, Types1_14.ENTITY_DATA_TYPES.booleanType, false));
-            storage.add(new EntityData(15, Types1_14.ENTITY_DATA_TYPES.varIntType, 2));
-        });
-
         filter().type(EntityTypes1_15.ENDERMAN).cancel(16);
         filter().type(EntityTypes1_15.TRIDENT).cancel(10);
 
         // Redundant health removed in 1.15
         filter().type(EntityTypes1_15.WOLF).addIndex(17);
-        filter().type(EntityTypes1_15.WOLF).index(8).handler((event, meta) -> {
+        filter().type(EntityTypes1_15.WOLF).index(8).handler((event, data) -> {
             event.createExtraData(new EntityData(17/*WOLF_HEALTH*/, Types1_14.ENTITY_DATA_TYPES.floatType, event.data().value()));
         });
     }
 
+    @Override
+    public void onMappingDataLoaded() {
+        mapTypes();
+
+        mapEntityTypeWithData(EntityTypes1_15.BEE, EntityTypes1_15.PUFFERFISH).jsonName().spawnEntityData(storage -> {
+            storage.add(new EntityData(14, Types1_14.ENTITY_DATA_TYPES.booleanType, false));
+            storage.add(new EntityData(15, Types1_14.ENTITY_DATA_TYPES.varIntType, 2));
+        });
+    }
+
     @Override
     public EntityType typeFromId(int typeId) {
         return EntityTypes1_15.getTypeFromId(typeId);
     }
-
-    @Override
-    public int newEntityId(final int newId) {
-        if (newId == 4) return EntityTypes1_14.PUFFERFISH.getId(); // Flying pufferfish!
-        return newId >= 5 ? newId - 1 : newId;
-    }
 }

common/src/main/java/com/viaversion/viabackwards/protocol/v1_16_2to1_16_1/Protocol1_16_2To1_16_1.java

@@ -21,8 +21,8 @@ import com.viaversion.viabackwards.api.BackwardsProtocol;
 import com.viaversion.viabackwards.api.data.BackwardsMappingData;
 import com.viaversion.viabackwards.api.rewriters.SoundRewriter;
 import com.viaversion.viabackwards.api.rewriters.TranslatableRewriter;
-import com.viaversion.viabackwards.protocol.v1_16_2to1_16_1.rewriter.CommandRewriter1_16_2;
 import com.viaversion.viabackwards.protocol.v1_16_2to1_16_1.rewriter.BlockItemPacketRewriter1_16_2;
+import com.viaversion.viabackwards.protocol.v1_16_2to1_16_1.rewriter.CommandRewriter1_16_2;
 import com.viaversion.viabackwards.protocol.v1_16_2to1_16_1.rewriter.EntityPacketRewriter1_16_2;
 import com.viaversion.viabackwards.protocol.v1_16_2to1_16_1.storage.BiomeStorage;
 import com.viaversion.viaversion.api.connection.UserConnection;
@@ -38,6 +38,7 @@ import com.viaversion.viaversion.protocols.v1_16_1to1_16_2.Protocol1_16_1To1_16_
 import com.viaversion.viaversion.protocols.v1_16_1to1_16_2.packet.ClientboundPackets1_16_2;
 import com.viaversion.viaversion.protocols.v1_16_1to1_16_2.packet.ServerboundPackets1_16_2;
 import com.viaversion.viaversion.rewriter.ComponentRewriter;
+import com.viaversion.viaversion.rewriter.ParticleRewriter;
 import com.viaversion.viaversion.rewriter.StatisticsRewriter;
 import com.viaversion.viaversion.rewriter.TagRewriter;
 import com.viaversion.viaversion.util.ProtocolLogger;
@@ -48,6 +49,7 @@ public class Protocol1_16_2To1_16_1 extends BackwardsProtocol<ClientboundPackets
     public static final ProtocolLogger LOGGER = new ProtocolLogger(Protocol1_16_2To1_16_1.class);
     private final EntityPacketRewriter1_16_2 entityRewriter = new EntityPacketRewriter1_16_2(this);
     private final BlockItemPacketRewriter1_16_2 blockItemPackets = new BlockItemPacketRewriter1_16_2(this);
+    private final ParticleRewriter<ClientboundPackets1_16_2> particleRewriter = new ParticleRewriter<>(this);
     private final TranslatableRewriter<ClientboundPackets1_16_2> translatableRewriter = new TranslatableRewriter<>(this, ComponentRewriter.ReadType.JSON);
     private final TagRewriter<ClientboundPackets1_16_2> tagRewriter = new TagRewriter<>(this);
 
@@ -67,6 +69,8 @@ public class Protocol1_16_2To1_16_1 extends BackwardsProtocol<ClientboundPackets
         translatableRewriter.registerOpenScreen(ClientboundPackets1_16_2.OPEN_SCREEN);
         translatableRewriter.registerPing();
 
+        particleRewriter.registerLevelParticles1_13(ClientboundPackets1_16_2.LEVEL_PARTICLES, Types.DOUBLE);
+
         new CommandRewriter1_16_2(this).registerDeclareCommands(ClientboundPackets1_16_2.COMMANDS);
 
         SoundRewriter<ClientboundPackets1_16_2> soundRewriter = new SoundRewriter<>(this);
@@ -151,6 +155,11 @@ public class Protocol1_16_2To1_16_1 extends BackwardsProtocol<ClientboundPackets
         return blockItemPackets;
     }
 
+    @Override
+    public ParticleRewriter<ClientboundPackets1_16_2> getParticleRewriter() {
+        return particleRewriter;
+    }
+
     @Override
     public TagRewriter<ClientboundPackets1_16_2> getTagRewriter() {
         return tagRewriter;

common/src/main/java/com/viaversion/viabackwards/protocol/v1_16_2to1_16_1/rewriter/BlockItemPacketRewriter1_16_2.java

@@ -114,8 +114,6 @@ public class BlockItemPacketRewriter1_16_2 extends BackwardsItemRewriter<Clientb
 
         blockRewriter.registerLevelEvent(ClientboundPackets1_16_2.LEVEL_EVENT, 1010, 2001);
 
-        registerLevelParticles(ClientboundPackets1_16_2.LEVEL_PARTICLES, Types.DOUBLE);
-
         registerContainerClick(ServerboundPackets1_16.CONTAINER_CLICK);
         registerSetCreativeModeSlot(ServerboundPackets1_16.SET_CREATIVE_MODE_SLOT);
         protocol.registerServerbound(ServerboundPackets1_16.EDIT_BOOK, wrapper -> handleItemToServer(wrapper.user(), wrapper.passthrough(Types.ITEM1_13_2)));

common/src/main/java/com/viaversion/viabackwards/protocol/v1_16_2to1_16_1/rewriter/EntityPacketRewriter1_16_2.java

@@ -101,13 +101,15 @@ public class EntityPacketRewriter1_16_2 extends EntityRewriter<ClientboundPacket
                     wrapper.write(Types.UNSIGNED_BYTE, (short) Math.min(maxPlayers, 255));
                 });
                 // ...
-                handler(getTrackerHandler(EntityTypes1_16_2.PLAYER, Types.INT));
+                handler(getPlayerTrackerHandler());
             }
         });
 
         protocol.registerClientbound(ClientboundPackets1_16_2.RESPAWN, wrapper -> {
             CompoundTag dimensionData = wrapper.read(Types.NAMED_COMPOUND_TAG);
             wrapper.write(Types.STRING, getDimensionFromData(dimensionData));
+
+            tracker(wrapper.user()).clearEntities();
         });
     }
 
@@ -120,7 +122,7 @@ public class EntityPacketRewriter1_16_2 extends EntityRewriter<ClientboundPacket
 
     @Override
     protected void registerRewrites() {
-        registerMetaTypeHandler(Types1_16.ENTITY_DATA_TYPES.itemType, null, Types1_16.ENTITY_DATA_TYPES.optionalBlockStateType,
+        registerEntityDataTypeHandler(Types1_16.ENTITY_DATA_TYPES.itemType, null, Types1_16.ENTITY_DATA_TYPES.optionalBlockStateType,
             Types1_16.ENTITY_DATA_TYPES.particleType, Types1_16.ENTITY_DATA_TYPES.componentType, Types1_16.ENTITY_DATA_TYPES.optionalComponentType);
 
         filter().type(EntityTypes1_16_2.ABSTRACT_PIGLIN).index(15).toIndex(16);

common/src/main/java/com/viaversion/viabackwards/protocol/v1_16to1_15_2/Protocol1_16To1_15_2.java

@@ -19,13 +19,14 @@ package com.viaversion.viabackwards.protocol.v1_16to1_15_2;
 
 import com.viaversion.viabackwards.api.BackwardsProtocol;
 import com.viaversion.viabackwards.api.rewriters.SoundRewriter;
-import com.viaversion.viabackwards.protocol.v1_16to1_15_2.rewriter.TranslatableRewriter1_16;
 import com.viaversion.viabackwards.protocol.v1_16to1_15_2.data.BackwardsMappingData1_16;
-import com.viaversion.viabackwards.protocol.v1_16to1_15_2.rewriter.CommandRewriter1_16;
-import com.viaversion.viabackwards.protocol.v1_16to1_15_2.storage.WorldNameTracker;
 import com.viaversion.viabackwards.protocol.v1_16to1_15_2.rewriter.BlockItemPacketRewriter1_16;
+import com.viaversion.viabackwards.protocol.v1_16to1_15_2.rewriter.CommandRewriter1_16;
 import com.viaversion.viabackwards.protocol.v1_16to1_15_2.rewriter.EntityPacketRewriter1_16;
+import com.viaversion.viabackwards.protocol.v1_16to1_15_2.rewriter.TranslatableRewriter1_16;
+import com.viaversion.viabackwards.protocol.v1_16to1_15_2.storage.PlayerAttributesStorage;
 import com.viaversion.viabackwards.protocol.v1_16to1_15_2.storage.PlayerSneakStorage;
+import com.viaversion.viabackwards.protocol.v1_16to1_15_2.storage.WorldNameTracker;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.minecraft.ClientWorld;
 import com.viaversion.viaversion.api.minecraft.RegistryType;
@@ -42,6 +43,7 @@ import com.viaversion.viaversion.protocols.v1_13_2to1_14.packet.ServerboundPacke
 import com.viaversion.viaversion.protocols.v1_14_4to1_15.packet.ClientboundPackets1_15;
 import com.viaversion.viaversion.protocols.v1_15_2to1_16.packet.ClientboundPackets1_16;
 import com.viaversion.viaversion.protocols.v1_15_2to1_16.packet.ServerboundPackets1_16;
+import com.viaversion.viaversion.rewriter.ParticleRewriter;
 import com.viaversion.viaversion.rewriter.StatisticsRewriter;
 import com.viaversion.viaversion.rewriter.TagRewriter;
 import com.viaversion.viaversion.util.GsonUtil;
@@ -52,6 +54,7 @@ public class Protocol1_16To1_15_2 extends BackwardsProtocol<ClientboundPackets1_
     public static final BackwardsMappingData1_16 MAPPINGS = new BackwardsMappingData1_16();
     private final EntityPacketRewriter1_16 entityRewriter = new EntityPacketRewriter1_16(this);
     private final BlockItemPacketRewriter1_16 blockItemPackets = new BlockItemPacketRewriter1_16(this);
+    private final ParticleRewriter<ClientboundPackets1_16> particleRewriter = new ParticleRewriter<>(this);
     private final TranslatableRewriter1_16 translatableRewriter = new TranslatableRewriter1_16(this);
     private final TagRewriter<ClientboundPackets1_16> tagRewriter = new TagRewriter<>(this);
 
@@ -70,9 +73,11 @@ public class Protocol1_16To1_15_2 extends BackwardsProtocol<ClientboundPackets1_
         translatableRewriter.registerTitle(ClientboundPackets1_16.SET_TITLES);
         translatableRewriter.registerPing();
 
+        particleRewriter.registerLevelParticles1_13(ClientboundPackets1_16.LEVEL_PARTICLES, Types.DOUBLE);
+
         new CommandRewriter1_16(this).registerDeclareCommands(ClientboundPackets1_16.COMMANDS);
 
-        registerClientbound(State.STATUS, ClientboundStatusPackets.STATUS_RESPONSE.getId(), ClientboundStatusPackets.STATUS_RESPONSE.getId(), wrapper -> {
+        registerClientbound(State.STATUS, ClientboundStatusPackets.STATUS_RESPONSE, wrapper -> {
             String original = wrapper.passthrough(Types.STRING);
             JsonObject object = GsonUtil.getGson().fromJson(original, JsonObject.class);
             JsonElement description = object.get("description");
@@ -115,7 +120,7 @@ public class Protocol1_16To1_15_2 extends BackwardsProtocol<ClientboundPackets1_
         soundRewriter.registerStopSound(ClientboundPackets1_16.STOP_SOUND);
 
         // Login success
-        registerClientbound(State.LOGIN, ClientboundLoginPackets.GAME_PROFILE.getId(), ClientboundLoginPackets.GAME_PROFILE.getId(), wrapper -> {
+        registerClientbound(State.LOGIN, ClientboundLoginPackets.LOGIN_FINISHED, wrapper -> {
             // Transform uuid to plain string
             UUID uuid = wrapper.read(Types.UUID);
             wrapper.write(Types.STRING, uuid.toString());
@@ -167,13 +172,12 @@ public class Protocol1_16To1_15_2 extends BackwardsProtocol<ClientboundPackets1_
 
     @Override
     public void init(UserConnection user) {
-        if (!user.has(ClientWorld.class)) {
-            user.put(new ClientWorld());
-        }
+        user.addEntityTracker(this.getClass(), new EntityTrackerBase(user, EntityTypes1_16.PLAYER));
+        user.addClientWorld(this.getClass(), new ClientWorld());
 
         user.put(new PlayerSneakStorage());
         user.put(new WorldNameTracker());
-        user.addEntityTracker(this.getClass(), new EntityTrackerBase(user, EntityTypes1_16.PLAYER));
+        user.put(new PlayerAttributesStorage());
     }
 
     @Override
@@ -196,6 +200,11 @@ public class Protocol1_16To1_15_2 extends BackwardsProtocol<ClientboundPackets1_
         return blockItemPackets;
     }
 
+    @Override
+    public ParticleRewriter<ClientboundPackets1_16> getParticleRewriter() {
+        return particleRewriter;
+    }
+
     @Override
     public TagRewriter<ClientboundPackets1_16> getTagRewriter() {
         return tagRewriter;

common/src/main/java/com/viaversion/viabackwards/protocol/v1_16to1_15_2/data/BackwardsMappingData1_16.java

@@ -21,6 +21,7 @@ import com.viaversion.nbt.tag.CompoundTag;
 import com.viaversion.viabackwards.api.data.BackwardsMappingData;
 import com.viaversion.viaversion.protocols.v1_15_2to1_16.Protocol1_15_2To1_16;
 import com.viaversion.viaversion.protocols.v1_15_2to1_16.data.AttributeMappings1_16;
+import com.viaversion.viaversion.util.Key;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -35,11 +36,11 @@ public class BackwardsMappingData1_16 extends BackwardsMappingData {
     protected void loadExtras(final CompoundTag data) {
         super.loadExtras(data);
         for (Map.Entry<String, String> entry : AttributeMappings1_16.attributeIdentifierMappings().entrySet()) {
-            attributeMappings.put(entry.getValue(), entry.getKey());
+            attributeMappings.put(Key.stripMinecraftNamespace(entry.getValue()), entry.getKey());
         }
     }
 
-    public Map<String, String> attributeIdentifierMappings() {
-        return attributeMappings;
+    public String mappedAttributeIdentifier(final String identifier) {
+        return attributeMappings.getOrDefault(identifier, identifier);
     }
 }

common/src/main/java/com/viaversion/viabackwards/protocol/v1_16to1_15_2/rewriter/BlockItemPacketRewriter1_16.java

@@ -17,12 +17,18 @@
  */
 package com.viaversion.viabackwards.protocol.v1_16to1_15_2.rewriter;
 
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.nbt.tag.IntArrayTag;
+import com.viaversion.nbt.tag.ListTag;
+import com.viaversion.nbt.tag.LongArrayTag;
+import com.viaversion.nbt.tag.StringTag;
+import com.viaversion.nbt.tag.Tag;
 import com.viaversion.viabackwards.api.rewriters.BackwardsItemRewriter;
 import com.viaversion.viabackwards.api.rewriters.EnchantmentRewriter;
 import com.viaversion.viabackwards.api.rewriters.MapColorRewriter;
+import com.viaversion.viabackwards.protocol.v1_16_2to1_16_1.storage.BiomeStorage;
 import com.viaversion.viabackwards.protocol.v1_16to1_15_2.Protocol1_16To1_15_2;
 import com.viaversion.viabackwards.protocol.v1_16to1_15_2.data.MapColorMappings1_15_2;
-import com.viaversion.viabackwards.protocol.v1_16_2to1_16_1.storage.BiomeStorage;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
@@ -33,12 +39,6 @@ import com.viaversion.viaversion.api.type.types.chunk.ChunkType1_15;
 import com.viaversion.viaversion.api.type.types.chunk.ChunkType1_16;
 import com.viaversion.viaversion.libs.gson.JsonElement;
 import com.viaversion.viaversion.protocols.v1_13_2to1_14.packet.ServerboundPackets1_14;
-import com.viaversion.nbt.tag.CompoundTag;
-import com.viaversion.nbt.tag.IntArrayTag;
-import com.viaversion.nbt.tag.ListTag;
-import com.viaversion.nbt.tag.LongArrayTag;
-import com.viaversion.nbt.tag.StringTag;
-import com.viaversion.nbt.tag.Tag;
 import com.viaversion.viaversion.protocols.v1_14_4to1_15.packet.ClientboundPackets1_15;
 import com.viaversion.viaversion.protocols.v1_15_2to1_16.packet.ClientboundPackets1_16;
 import com.viaversion.viaversion.protocols.v1_15_2to1_16.rewriter.ItemPacketRewriter1_16;
@@ -179,8 +179,6 @@ public class BlockItemPacketRewriter1_16 extends BackwardsItemRewriter<Clientbou
 
         blockRewriter.registerLevelEvent(ClientboundPackets1_16.LEVEL_EVENT, 1010, 2001);
 
-        registerLevelParticles(ClientboundPackets1_16.LEVEL_PARTICLES, Types.DOUBLE);
-
         protocol.registerClientbound(ClientboundPackets1_16.CONTAINER_SET_DATA, new PacketHandlers() {
             @Override
             public void register() {

common/src/main/java/com/viaversion/viabackwards/protocol/v1_16to1_15_2/rewriter/EntityPacketRewriter1_16.java

@@ -19,17 +19,18 @@ package com.viaversion.viabackwards.protocol.v1_16to1_15_2.rewriter;
 
 import com.viaversion.viabackwards.api.rewriters.EntityRewriter;
 import com.viaversion.viabackwards.protocol.v1_16to1_15_2.Protocol1_16To1_15_2;
-import com.viaversion.viabackwards.protocol.v1_16to1_15_2.storage.WorldNameTracker;
+import com.viaversion.viabackwards.protocol.v1_16to1_15_2.storage.PlayerAttributesStorage;
 import com.viaversion.viabackwards.protocol.v1_16to1_15_2.storage.WolfDataMaskStorage;
+import com.viaversion.viabackwards.protocol.v1_16to1_15_2.storage.WorldNameTracker;
 import com.viaversion.viaversion.api.Via;
 import com.viaversion.viaversion.api.data.entity.StoredEntityData;
 import com.viaversion.viaversion.api.minecraft.ClientWorld;
 import com.viaversion.viaversion.api.minecraft.Particle;
 import com.viaversion.viaversion.api.minecraft.entities.EntityType;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_16;
-import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.minecraft.entitydata.EntityData;
 import com.viaversion.viaversion.api.minecraft.entitydata.EntityDataType;
+import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
 import com.viaversion.viaversion.api.protocol.remapper.ValueTransformer;
@@ -41,6 +42,7 @@ import com.viaversion.viaversion.libs.gson.JsonElement;
 import com.viaversion.viaversion.protocols.v1_14_4to1_15.packet.ClientboundPackets1_15;
 import com.viaversion.viaversion.protocols.v1_15_2to1_16.packet.ClientboundPackets1_16;
 import com.viaversion.viaversion.util.Key;
+import java.util.UUID;
 
 public class EntityPacketRewriter1_16 extends EntityRewriter<ClientboundPackets1_16, Protocol1_16To1_15_2> {
 
@@ -109,7 +111,7 @@ public class EntityPacketRewriter1_16 extends EntityRewriter<ClientboundPackets1
                     wrapper.read(Types.BYTE); // Previous gamemode
 
                     // Grab client world
-                    ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
+                    ClientWorld clientWorld = wrapper.user().getClientWorld(Protocol1_16To1_15_2.class);
                     int dimension = wrapper.get(Types.INT, 0);
 
                     // Send a dummy respawn with a different dimension if the world name was different and the same dimension was used
@@ -125,14 +127,26 @@ public class EntityPacketRewriter1_16 extends EntityRewriter<ClientboundPackets1
                         packet.send(Protocol1_16To1_15_2.class);
                     }
 
-                    clientWorld.setEnvironment(dimension);
+                    if (clientWorld.setEnvironment(dimension)) {
+                        tracker(wrapper.user()).clearEntities();
+                    }
 
                     wrapper.write(Types.STRING, "default"); // Level type
                     wrapper.read(Types.BOOLEAN); // Debug
                     if (wrapper.read(Types.BOOLEAN)) {
                         wrapper.set(Types.STRING, 0, "flat");
                     }
-                    wrapper.read(Types.BOOLEAN); // Keep all playerdata
+
+                    final PlayerAttributesStorage attributes = wrapper.user().get(PlayerAttributesStorage.class);
+                    final boolean keepPlayerAttributes = wrapper.read(Types.BOOLEAN);
+                    if (keepPlayerAttributes) {
+                        // Ensure packet order
+                        wrapper.send(Protocol1_16To1_15_2.class);
+                        wrapper.cancel();
+                        attributes.sendAttributes(wrapper.user(), tracker(wrapper.user()).clientEntityId());
+                    } else {
+                        attributes.clearAttributes();
+                    }
 
                     // Finally update the world name
                     worldNameTracker.setWorldName(nextWorldName);
@@ -156,9 +170,8 @@ public class EntityPacketRewriter1_16 extends EntityRewriter<ClientboundPackets1
                 map(Types.LONG); // Seed
                 map(Types.UNSIGNED_BYTE); // Max players
                 handler(wrapper -> {
-                    ClientWorld clientChunks = wrapper.user().get(ClientWorld.class);
-                    clientChunks.setEnvironment(wrapper.get(Types.INT, 1));
-                    tracker(wrapper.user()).addEntity(wrapper.get(Types.INT, 0), EntityTypes1_16.PLAYER);
+                    ClientWorld clientWorld = wrapper.user().getClientWorld(Protocol1_16To1_15_2.class);
+                    clientWorld.setEnvironment(wrapper.get(Types.INT, 1));
 
                     wrapper.write(Types.STRING, "default"); // Level type
 
@@ -171,6 +184,7 @@ public class EntityPacketRewriter1_16 extends EntityRewriter<ClientboundPackets1
                         wrapper.set(Types.STRING, 0, "flat");
                     }
                 });
+                handler(playerTrackerHandler());
             }
         });
 
@@ -182,19 +196,29 @@ public class EntityPacketRewriter1_16 extends EntityRewriter<ClientboundPackets1
         registerSetEntityData(ClientboundPackets1_16.SET_ENTITY_DATA, Types1_16.ENTITY_DATA_LIST, Types1_14.ENTITY_DATA_LIST);
 
         protocol.registerClientbound(ClientboundPackets1_16.UPDATE_ATTRIBUTES, wrapper -> {
-            wrapper.passthrough(Types.VAR_INT);
-            int size = wrapper.passthrough(Types.INT);
-            for (int i = 0; i < size; i++) {
-                String attributeIdentifier = wrapper.read(Types.STRING);
-                String oldKey = protocol.getMappingData().attributeIdentifierMappings().get(attributeIdentifier);
-                wrapper.write(Types.STRING, oldKey != null ? oldKey : Key.stripMinecraftNamespace(attributeIdentifier));
+            final PlayerAttributesStorage attributes = wrapper.user().get(PlayerAttributesStorage.class);
 
-                wrapper.passthrough(Types.DOUBLE);
-                int modifierSize = wrapper.passthrough(Types.VAR_INT);
-                for (int j = 0; j < modifierSize; j++) {
-                    wrapper.passthrough(Types.UUID);
-                    wrapper.passthrough(Types.DOUBLE);
-                    wrapper.passthrough(Types.BYTE);
+            final int entityId = wrapper.passthrough(Types.VAR_INT);
+
+            final int size = wrapper.passthrough(Types.INT);
+            for (int i = 0; i < size; i++) {
+                final String identifier = Key.stripMinecraftNamespace(wrapper.read(Types.STRING));
+
+                final String mappedIdentifier = protocol.getMappingData().mappedAttributeIdentifier(identifier);
+                wrapper.write(Types.STRING, mappedIdentifier);
+                final double value = wrapper.passthrough(Types.DOUBLE);
+
+                final int count = wrapper.passthrough(Types.VAR_INT);
+                final var modifiers = new PlayerAttributesStorage.AttributeModifier[count];
+                for (int j = 0; j < count; j++) {
+                    final UUID uuid = wrapper.passthrough(Types.UUID);
+                    final double amount = wrapper.passthrough(Types.DOUBLE);
+                    final byte operation = wrapper.passthrough(Types.BYTE);
+
+                    modifiers[j] = new PlayerAttributesStorage.AttributeModifier(uuid, amount, operation);
+                }
+                if (entityId == tracker(wrapper.user()).clientEntityId()) {
+                    attributes.addAttribute(mappedIdentifier, new PlayerAttributesStorage.Attribute(value, modifiers));
                 }
             }
         });
@@ -230,18 +254,18 @@ public class EntityPacketRewriter1_16 extends EntityRewriter<ClientboundPackets1
 
     @Override
     protected void registerRewrites() {
-        filter().handler((event, meta) -> {
-            meta.setDataType(Types1_14.ENTITY_DATA_TYPES.byId(meta.dataType().typeId()));
+        filter().handler((event, data) -> {
+            data.setDataType(Types1_14.ENTITY_DATA_TYPES.byId(data.dataType().typeId()));
 
-            EntityDataType type = meta.dataType();
+            EntityDataType type = data.dataType();
             if (type == Types1_14.ENTITY_DATA_TYPES.itemType) {
-                meta.setValue(protocol.getItemRewriter().handleItemToClient(event.user(), (Item) meta.getValue()));
+                data.setValue(protocol.getItemRewriter().handleItemToClient(event.user(), (Item) data.getValue()));
             } else if (type == Types1_14.ENTITY_DATA_TYPES.optionalBlockStateType) {
-                meta.setValue(protocol.getMappingData().getNewBlockStateId((int) meta.getValue()));
+                data.setValue(protocol.getMappingData().getNewBlockStateId((int) data.getValue()));
             } else if (type == Types1_14.ENTITY_DATA_TYPES.particleType) {
-                rewriteParticle(event.user(), (Particle) meta.getValue());
+                protocol.getParticleRewriter().rewriteParticle(event.user(), (Particle) data.getValue());
             } else if (type == Types1_14.ENTITY_DATA_TYPES.optionalComponentType) {
-                JsonElement text = meta.value();
+                JsonElement text = data.value();
                 if (text != null) {
                     protocol.getComponentRewriter().processText(event.user(), text);
                 }
@@ -255,9 +279,9 @@ public class EntityPacketRewriter1_16 extends EntityRewriter<ClientboundPackets1
         filter().type(EntityTypes1_16.PIGLIN).cancel(17);
         filter().type(EntityTypes1_16.PIGLIN).cancel(18);
 
-        filter().type(EntityTypes1_16.STRIDER).index(15).handler((event, meta) -> {
-            boolean baby = meta.value();
-            meta.setTypeAndValue(Types1_14.ENTITY_DATA_TYPES.varIntType, baby ? 1 : 3);
+        filter().type(EntityTypes1_16.STRIDER).index(15).handler((event, data) -> {
+            boolean baby = data.value();
+            data.setTypeAndValue(Types1_14.ENTITY_DATA_TYPES.varIntType, baby ? 1 : 3);
         });
         filter().type(EntityTypes1_16.STRIDER).cancel(16);
         filter().type(EntityTypes1_16.STRIDER).cancel(17);
@@ -266,29 +290,29 @@ public class EntityPacketRewriter1_16 extends EntityRewriter<ClientboundPackets1
         filter().type(EntityTypes1_16.FISHING_BOBBER).cancel(8);
 
         filter().type(EntityTypes1_16.ABSTRACT_ARROW).cancel(8);
-        filter().type(EntityTypes1_16.ABSTRACT_ARROW).handler((event, meta) -> {
+        filter().type(EntityTypes1_16.ABSTRACT_ARROW).handler((event, data) -> {
             if (event.index() >= 8) {
                 event.setIndex(event.index() + 1);
             }
         });
 
-        filter().type(EntityTypes1_16.WOLF).index(16).handler((event, meta) -> {
-            byte mask = meta.value();
-            StoredEntityData data = tracker(event.user()).entityData(event.entityId());
-            data.put(new WolfDataMaskStorage(mask));
+        filter().type(EntityTypes1_16.WOLF).index(16).handler((event, data) -> {
+            byte mask = data.value();
+            StoredEntityData entityData = tracker(event.user()).entityData(event.entityId());
+            entityData.put(new WolfDataMaskStorage(mask));
         });
 
-        filter().type(EntityTypes1_16.WOLF).index(20).handler((event, meta) -> {
-            StoredEntityData data = tracker(event.user()).entityDataIfPresent(event.entityId());
+        filter().type(EntityTypes1_16.WOLF).index(20).handler((event, data) -> {
+            StoredEntityData entityData = tracker(event.user()).entityDataIfPresent(event.entityId());
             byte previousMask = 0;
-            if (data != null) {
-                WolfDataMaskStorage wolfData = data.get(WolfDataMaskStorage.class);
+            if (entityData != null) {
+                WolfDataMaskStorage wolfData = entityData.get(WolfDataMaskStorage.class);
                 if (wolfData != null) {
                     previousMask = wolfData.tameableMask();
                 }
             }
 
-            int angerTime = meta.value();
+            int angerTime = data.value();
             byte tameableMask = (byte) (angerTime > 0 ? previousMask | 2 : previousMask & -3);
             event.createExtraData(new EntityData(16, Types1_14.ENTITY_DATA_TYPES.byteType, tameableMask));
             event.cancel();

common/src/main/java/com/viaversion/viabackwards/protocol/v1_16to1_15_2/storage/PlayerAttributesStorage.java

@@ -0,0 +1,67 @@
+/*
+ * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards
+ * 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.viabackwards.protocol.v1_16to1_15_2.storage;
+
+import com.viaversion.viabackwards.protocol.v1_16to1_15_2.Protocol1_16To1_15_2;
+import com.viaversion.viaversion.api.connection.StorableObject;
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
+import com.viaversion.viaversion.api.type.Types;
+import com.viaversion.viaversion.protocols.v1_14_4to1_15.packet.ClientboundPackets1_15;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+
+public final class PlayerAttributesStorage implements StorableObject {
+
+    private final Map<String, Attribute> attributes = new HashMap<>();
+
+    public void sendAttributes(final UserConnection connection, final int entityId) {
+        final PacketWrapper updateAttributes = PacketWrapper.create(ClientboundPackets1_15.UPDATE_ATTRIBUTES, connection);
+
+        updateAttributes.write(Types.VAR_INT, entityId);
+        updateAttributes.write(Types.INT, attributes.size());
+        for (final Map.Entry<String, Attribute> attributeEntry : attributes.entrySet()) {
+            final Attribute attribute = attributeEntry.getValue();
+            updateAttributes.write(Types.STRING, attributeEntry.getKey());
+            updateAttributes.write(Types.DOUBLE, attribute.value());
+            updateAttributes.write(Types.VAR_INT, attribute.modifiers().length);
+
+            for (final AttributeModifier modifier : attribute.modifiers()) {
+                updateAttributes.write(Types.UUID, modifier.uuid());
+                updateAttributes.write(Types.DOUBLE, modifier.amount());
+                updateAttributes.write(Types.BYTE, modifier.operation());
+            }
+        }
+        updateAttributes.send(Protocol1_16To1_15_2.class);
+    }
+
+    public void clearAttributes() {
+        attributes.clear();
+    }
+
+    public void addAttribute(final String key, final Attribute attribute) {
+        attributes.put(key, attribute);
+    }
+
+    public record Attribute(double value, AttributeModifier[] modifiers) {
+    }
+
+    public record AttributeModifier(UUID uuid, double amount, byte operation) {
+    }
+}

common/src/main/java/com/viaversion/viabackwards/protocol/v1_17_1to1_17/Protocol1_17_1To1_17.java

@@ -102,6 +102,12 @@ public final class Protocol1_17_1To1_17 extends BackwardsProtocol<ClientboundPac
             boolean signing = wrapper.read(Types.BOOLEAN);
             wrapper.passthrough(Types.VAR_INT); // Slot comes first
 
+            if (item == null) {
+                wrapper.write(Types.VAR_INT, 0); // Pages length
+                wrapper.write(Types.BOOLEAN, false); // Optional title
+                return;
+            }
+
             CompoundTag tag = item.tag();
             ListTag<StringTag> pagesTag;
             StringTag titleTag = null;

common/src/main/java/com/viaversion/viabackwards/protocol/v1_17to1_16_4/Protocol1_17To1_16_4.java

@@ -24,7 +24,6 @@ import com.viaversion.viabackwards.api.rewriters.SoundRewriter;
 import com.viaversion.viabackwards.api.rewriters.TranslatableRewriter;
 import com.viaversion.viabackwards.protocol.v1_17to1_16_4.rewriter.BlockItemPacketRewriter1_17;
 import com.viaversion.viabackwards.protocol.v1_17to1_16_4.rewriter.EntityPacketRewriter1_17;
-import com.viaversion.viabackwards.protocol.v1_17to1_16_4.storage.PingRequests;
 import com.viaversion.viabackwards.protocol.v1_17to1_16_4.storage.PlayerLastCursorItem;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.minecraft.RegistryType;
@@ -43,6 +42,7 @@ import com.viaversion.viaversion.protocols.v1_16_4to1_17.packet.ClientboundPacke
 import com.viaversion.viaversion.protocols.v1_16_4to1_17.packet.ServerboundPackets1_17;
 import com.viaversion.viaversion.rewriter.ComponentRewriter;
 import com.viaversion.viaversion.rewriter.IdRewriteFunction;
+import com.viaversion.viaversion.rewriter.ParticleRewriter;
 import com.viaversion.viaversion.rewriter.StatisticsRewriter;
 import com.viaversion.viaversion.rewriter.TagRewriter;
 import com.viaversion.viaversion.util.Key;
@@ -58,6 +58,7 @@ public final class Protocol1_17To1_16_4 extends BackwardsProtocol<ClientboundPac
     private static final int[] EMPTY_ARRAY = {};
     private final EntityPacketRewriter1_17 entityRewriter = new EntityPacketRewriter1_17(this);
     private final BlockItemPacketRewriter1_17 blockItemPackets = new BlockItemPacketRewriter1_17(this);
+    private final ParticleRewriter<ClientboundPackets1_17> particleRewriter = new ParticleRewriter<>(this);
     private final TranslatableRewriter<ClientboundPackets1_17> translatableRewriter = new TranslatableRewriter<>(this, ComponentRewriter.ReadType.JSON);
     private final TagRewriter<ClientboundPackets1_17> tagRewriter = new TagRewriter<>(this);
 
@@ -170,8 +171,6 @@ public final class Protocol1_17To1_16_4 extends BackwardsProtocol<ClientboundPac
             int id = wrapper.read(Types.INT);
             short shortId = (short) id;
             if (id == shortId && ViaBackwards.getConfig().handlePingsAsInvAcknowledgements()) {
-                wrapper.user().get(PingRequests.class).addId(shortId);
-
                 // Send inventory acknowledgement to replace ping packet functionality in the unsigned byte range
                 PacketWrapper acknowledgementPacket = wrapper.create(ClientboundPackets1_16_2.CONTAINER_ACK);
                 acknowledgementPacket.write(Types.UNSIGNED_BYTE, (short) 0); // Inventory id
@@ -202,10 +201,10 @@ public final class Protocol1_17To1_16_4 extends BackwardsProtocol<ClientboundPac
             }
         });
 
-        //TODO translatables
-        mergePacket(ClientboundPackets1_17.SET_TITLE_TEXT, ClientboundPackets1_16_2.SET_TITLES, 0);
-        mergePacket(ClientboundPackets1_17.SET_SUBTITLE_TEXT, ClientboundPackets1_16_2.SET_TITLES, 1);
-        mergePacket(ClientboundPackets1_17.SET_ACTION_BAR_TEXT, ClientboundPackets1_16_2.SET_TITLES, 2);
+        rewriteTitlePacket(ClientboundPackets1_17.SET_TITLE_TEXT, 0);
+        rewriteTitlePacket(ClientboundPackets1_17.SET_SUBTITLE_TEXT, 1);
+        rewriteTitlePacket(ClientboundPackets1_17.SET_ACTION_BAR_TEXT, 2);
+
         mergePacket(ClientboundPackets1_17.SET_TITLES_ANIMATION, ClientboundPackets1_16_2.SET_TITLES, 3);
         registerClientbound(ClientboundPackets1_17.CLEAR_TITLES, ClientboundPackets1_16_2.SET_TITLES, wrapper -> {
             if (wrapper.read(Types.BOOLEAN)) {
@@ -221,7 +220,6 @@ public final class Protocol1_17To1_16_4 extends BackwardsProtocol<ClientboundPac
     @Override
     public void init(UserConnection user) {
         addEntityTracker(user, new EntityTrackerBase(user, EntityTypes1_17.PLAYER));
-        user.put(new PingRequests());
         user.put(new PlayerLastCursorItem());
     }
 
@@ -240,6 +238,14 @@ public final class Protocol1_17To1_16_4 extends BackwardsProtocol<ClientboundPac
         registerClientbound(newPacketType, oldPacketType, wrapper -> wrapper.write(Types.VAR_INT, type));
     }
 
+    private void rewriteTitlePacket(ClientboundPackets1_17 newPacketType, int type) {
+        // Also handles translations in the title
+        registerClientbound(newPacketType, ClientboundPackets1_16_2.SET_TITLES, wrapper -> {
+            wrapper.write(Types.VAR_INT, type);
+            translatableRewriter.processText(wrapper.user(), wrapper.passthrough(Types.COMPONENT));
+        });
+    }
+
     @Override
     public EntityPacketRewriter1_17 getEntityRewriter() {
         return entityRewriter;
@@ -250,6 +256,11 @@ public final class Protocol1_17To1_16_4 extends BackwardsProtocol<ClientboundPac
         return blockItemPackets;
     }
 
+    @Override
+    public ParticleRewriter<ClientboundPackets1_17> getParticleRewriter() {
+        return particleRewriter;
+    }
+
     @Override
     public TagRewriter<ClientboundPackets1_17> getTagRewriter() {
         return tagRewriter;

common/src/main/java/com/viaversion/viabackwards/protocol/v1_17to1_16_4/rewriter/BlockItemPacketRewriter1_17.java

@@ -17,27 +17,28 @@
  */
 package com.viaversion.viabackwards.protocol.v1_17to1_16_4.rewriter;
 
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.nbt.tag.LongArrayTag;
+import com.viaversion.nbt.tag.NumberTag;
+import com.viaversion.nbt.tag.Tag;
 import com.viaversion.viabackwards.ViaBackwards;
 import com.viaversion.viabackwards.api.rewriters.BackwardsItemRewriter;
 import com.viaversion.viabackwards.api.rewriters.MapColorRewriter;
 import com.viaversion.viabackwards.protocol.v1_17to1_16_4.Protocol1_17To1_16_4;
 import com.viaversion.viabackwards.protocol.v1_17to1_16_4.data.MapColorMappings1_16_4;
-import com.viaversion.viabackwards.protocol.v1_17to1_16_4.storage.PingRequests;
 import com.viaversion.viabackwards.protocol.v1_17to1_16_4.storage.PlayerLastCursorItem;
 import com.viaversion.viaversion.api.data.entity.EntityTracker;
 import com.viaversion.viaversion.api.minecraft.BlockChangeRecord;
 import com.viaversion.viaversion.api.minecraft.chunks.Chunk;
 import com.viaversion.viaversion.api.minecraft.chunks.ChunkSection;
+import com.viaversion.viaversion.api.minecraft.chunks.DataPalette;
+import com.viaversion.viaversion.api.minecraft.chunks.PaletteType;
 import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.api.type.types.chunk.ChunkType1_16_2;
 import com.viaversion.viaversion.api.type.types.chunk.ChunkType1_17;
-import com.viaversion.nbt.tag.CompoundTag;
-import com.viaversion.nbt.tag.LongArrayTag;
-import com.viaversion.nbt.tag.NumberTag;
-import com.viaversion.nbt.tag.Tag;
 import com.viaversion.viaversion.protocols.v1_16_1to1_16_2.packet.ClientboundPackets1_16_2;
 import com.viaversion.viaversion.protocols.v1_16_1to1_16_2.packet.ServerboundPackets1_16_2;
 import com.viaversion.viaversion.protocols.v1_16_4to1_17.packet.ClientboundPackets1_17;
@@ -53,6 +54,8 @@ import java.util.List;
 
 public final class BlockItemPacketRewriter1_17 extends BackwardsItemRewriter<ClientboundPackets1_17, ServerboundPackets1_16_2, Protocol1_17To1_16_4> {
 
+    private static final int BEDROCK_BLOCK_STATE = 33;
+
     public BlockItemPacketRewriter1_17(Protocol1_17To1_16_4 protocol) {
         super(protocol, Types.ITEM1_13_2, Types.ITEM1_13_2_SHORT_ARRAY);
     }
@@ -163,7 +166,7 @@ public final class BlockItemPacketRewriter1_17 extends BackwardsItemRewriter<Cli
             short inventoryId = wrapper.read(Types.UNSIGNED_BYTE);
             short confirmationId = wrapper.read(Types.SHORT);
             boolean accepted = wrapper.read(Types.BOOLEAN);
-            if (inventoryId == 0 && accepted && wrapper.user().get(PingRequests.class).removeId(confirmationId)) {
+            if (inventoryId == 0 && accepted) {
                 PacketWrapper pongPacket = wrapper.create(ServerboundPackets1_17.PONG);
                 pongPacket.write(Types.INT, (int) confirmationId);
                 pongPacket.sendToServer(Protocol1_17To1_16_4.class);
@@ -201,7 +204,7 @@ public final class BlockItemPacketRewriter1_17 extends BackwardsItemRewriter<Cli
                         wrapper.cancel();
                     }
                 });
-                handler(levelParticlesHandler());
+                handler(protocol.getParticleRewriter().levelParticlesHandler1_13(Types.INT));
             }
         });
 
@@ -243,13 +246,14 @@ public final class BlockItemPacketRewriter1_17 extends BackwardsItemRewriter<Cli
 
             private void writeLightArrays(PacketWrapper wrapper, BitSet bitMask, int cutBitMask,
                                           int startFromSection, int sectionHeight) {
-                wrapper.read(Types.VAR_INT); // Length - throw it away
-
+                int packetContentsLength = wrapper.read(Types.VAR_INT);
+                int read = 0;
                 List<byte[]> light = new ArrayList<>();
 
                 // Remove lower bounds
                 for (int i = 0; i < startFromSection; i++) {
                     if (bitMask.get(i)) {
+                        read++;
                         wrapper.read(Types.BYTE_ARRAY_PRIMITIVE);
                     }
                 }
@@ -257,6 +261,7 @@ public final class BlockItemPacketRewriter1_17 extends BackwardsItemRewriter<Cli
                 // Add the important 18 sections
                 for (int i = 0; i < 18; i++) {
                     if (isSet(cutBitMask, i)) {
+                        read++;
                         light.add(wrapper.read(Types.BYTE_ARRAY_PRIMITIVE));
                     }
                 }
@@ -264,6 +269,14 @@ public final class BlockItemPacketRewriter1_17 extends BackwardsItemRewriter<Cli
                 // Remove upper bounds
                 for (int i = startFromSection + 18; i < sectionHeight + 2; i++) {
                     if (bitMask.get(i)) {
+                        read++;
+                        wrapper.read(Types.BYTE_ARRAY_PRIMITIVE);
+                    }
+                }
+
+                if (read != packetContentsLength) {
+                    // Read the rest if the server for some reason sends more than are actually consumed
+                    for (int i = read; i < packetContentsLength; i++) {
                         wrapper.read(Types.BYTE_ARRAY_PRIMITIVE);
                     }
                 }
@@ -295,7 +308,11 @@ public final class BlockItemPacketRewriter1_17 extends BackwardsItemRewriter<Cli
 
                     BlockChangeRecord[] records = wrapper.passthrough(Types.VAR_LONG_BLOCK_CHANGE_ARRAY);
                     for (BlockChangeRecord record : records) {
-                        record.setBlockId(protocol.getMappingData().getNewBlockStateId(record.getBlockId()));
+                        if (ViaBackwards.getConfig().bedrockAtY0() && chunkY == 0 && record.getSectionY() == 0) {
+                            record.setBlockId(BEDROCK_BLOCK_STATE);
+                        } else {
+                            record.setBlockId(protocol.getMappingData().getNewBlockStateId(record.getBlockId()));
+                        }
                     }
                 });
             }
@@ -313,7 +330,11 @@ public final class BlockItemPacketRewriter1_17 extends BackwardsItemRewriter<Cli
                         return;
                     }
 
-                    wrapper.set(Types.VAR_INT, 0, protocol.getMappingData().getNewBlockStateId(wrapper.get(Types.VAR_INT, 0)));
+                    if (ViaBackwards.getConfig().bedrockAtY0() && y == 0) {
+                        wrapper.set(Types.VAR_INT, 0, BEDROCK_BLOCK_STATE);
+                    } else {
+                        wrapper.set(Types.VAR_INT, 0, protocol.getMappingData().getNewBlockStateId(wrapper.get(Types.VAR_INT, 0)));
+                    }
                 });
             }
         });
@@ -350,15 +371,32 @@ public final class BlockItemPacketRewriter1_17 extends BackwardsItemRewriter<Cli
 
             blockRewriter.handleChunk(chunk);
 
+            if (ViaBackwards.getConfig().bedrockAtY0()) {
+                final ChunkSection lowestSection = chunk.getSections()[0];
+                if (lowestSection != null) {
+                    final DataPalette blocks = lowestSection.palette(PaletteType.BLOCKS);
+                    for (int x = 0; x < 16; x++) {
+                        for (int z = 0; z < 16; z++) {
+                            blocks.setIdAt(x, 0, z, BEDROCK_BLOCK_STATE);
+                        }
+                    }
+                }
+            }
+
             chunk.getBlockEntities().removeIf(compound -> {
                 NumberTag tag = compound.getNumberTag("y");
-                return tag != null && (tag.asInt() < 0 || tag.asInt() > 255);
+                if (tag == null) {
+                    return false;
+                }
+
+                final int y = tag.asInt();
+                return y < 0 || y > 255 || (ViaBackwards.getConfig().bedrockAtY0() && y == 0);
             });
         });
 
         protocol.registerClientbound(ClientboundPackets1_17.BLOCK_ENTITY_DATA, wrapper -> {
             int y = wrapper.passthrough(Types.BLOCK_POSITION1_14).y();
-            if (y < 0 || y > 255) {
+            if (y < 0 || y > 255 || (ViaBackwards.getConfig().bedrockAtY0() && y == 0)) {
                 wrapper.cancel();
             }
         });
@@ -369,7 +407,7 @@ public final class BlockItemPacketRewriter1_17 extends BackwardsItemRewriter<Cli
                 map(Types.VAR_INT);
                 handler(wrapper -> {
                     int y = wrapper.passthrough(Types.BLOCK_POSITION1_14).y();
-                    if (y < 0 || y > 255) {
+                    if (y < 0 || y > 255 || (ViaBackwards.getConfig().bedrockAtY0() && y == 0)) {
                         wrapper.cancel();
                     }
                 });

common/src/main/java/com/viaversion/viabackwards/protocol/v1_17to1_16_4/rewriter/EntityPacketRewriter1_17.java

@@ -17,26 +17,29 @@
  */
 package com.viaversion.viabackwards.protocol.v1_17to1_16_4.rewriter;
 
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.nbt.tag.ListTag;
+import com.viaversion.nbt.tag.NumberTag;
+import com.viaversion.nbt.tag.StringTag;
 import com.viaversion.viabackwards.ViaBackwards;
 import com.viaversion.viabackwards.api.rewriters.EntityRewriter;
 import com.viaversion.viabackwards.protocol.v1_17to1_16_4.Protocol1_17To1_16_4;
 import com.viaversion.viaversion.api.minecraft.Particle;
 import com.viaversion.viaversion.api.minecraft.entities.EntityType;
+import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_16_2;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_17;
 import com.viaversion.viaversion.api.minecraft.entitydata.EntityDataType;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
-import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.api.type.types.version.Types1_16;
 import com.viaversion.viaversion.api.type.types.version.Types1_17;
 import com.viaversion.viaversion.protocols.v1_16_1to1_16_2.packet.ClientboundPackets1_16_2;
-import com.viaversion.nbt.tag.*;
 import com.viaversion.viaversion.protocols.v1_16_4to1_17.packet.ClientboundPackets1_17;
 import com.viaversion.viaversion.util.TagUtil;
 
 public final class EntityPacketRewriter1_17 extends EntityRewriter<ClientboundPackets1_17, Protocol1_17To1_16_4> {
 
-    private boolean warned;
+    private boolean warned = ViaBackwards.getConfig().bedrockAtY0() || ViaBackwards.getConfig().suppressEmulationWarnings();
 
     public EntityPacketRewriter1_17(Protocol1_17To1_16_4 protocol) {
         super(protocol);
@@ -51,6 +54,29 @@ public final class EntityPacketRewriter1_17 extends EntityRewriter<ClientboundPa
         registerTracker(ClientboundPackets1_17.ADD_PLAYER, EntityTypes1_17.PLAYER);
         registerSetEntityData(ClientboundPackets1_17.SET_ENTITY_DATA, Types1_17.ENTITY_DATA_LIST, Types1_16.ENTITY_DATA_LIST);
 
+        protocol.appendClientbound(ClientboundPackets1_17.ADD_ENTITY, wrapper -> {
+            final int entityType = wrapper.get(Types.VAR_INT, 1);
+            if (entityType != EntityTypes1_16_2.ITEM_FRAME.getId()) {
+                return;
+            }
+
+            // Older clients will ignore the data field and the server sets the item frame rotation by the yaw/pitch field inside the packet,
+            // newer clients do the opposite and ignore yaw/pitch and use the data field from the packet.
+            final int data = wrapper.get(Types.INT, 0);
+
+            float pitch = 0F;
+            float yaw = 0F;
+            switch (Math.abs(data % 6)) {
+                case 0 /* down */ -> pitch = 90F;
+                case 1 /* up */ -> pitch = -90F;
+                case 2 /* north */ -> yaw = 180F;
+                case 4 /* west */ -> yaw = 90F;
+                case 5 /* east */ -> yaw = 270;
+            }
+            wrapper.set(Types.BYTE, 0, (byte) (pitch * 256F / 360F));
+            wrapper.set(Types.BYTE, 1, (byte) (yaw * 256F / 360F));
+        });
+
         protocol.registerClientbound(ClientboundPackets1_17.REMOVE_ENTITY, ClientboundPackets1_16_2.REMOVE_ENTITIES, wrapper -> {
             int entityId = wrapper.read(Types.VAR_INT);
             tracker(wrapper.user()).removeEntity(entityId);
@@ -77,7 +103,7 @@ public final class EntityPacketRewriter1_17 extends EntityRewriter<ClientboundPa
                         wrapper.set(Types.BYTE, 1, (byte) 0);
                     }
                 });
-                handler(getTrackerHandler(EntityTypes1_17.PLAYER, Types.INT));
+                handler(getPlayerTrackerHandler());
                 handler(worldDataTrackerHandler(1));
                 handler(wrapper -> {
                     CompoundTag registry = wrapper.get(Types.NAMED_COMPOUND_TAG, 0);
@@ -133,20 +159,25 @@ public final class EntityPacketRewriter1_17 extends EntityRewriter<ClientboundPa
             }
         });
 
-        // TODO translatables
         protocol.mergePacket(ClientboundPackets1_17.PLAYER_COMBAT_ENTER, ClientboundPackets1_16_2.PLAYER_COMBAT, 0);
         protocol.mergePacket(ClientboundPackets1_17.PLAYER_COMBAT_END, ClientboundPackets1_16_2.PLAYER_COMBAT, 1);
-        protocol.mergePacket(ClientboundPackets1_17.PLAYER_COMBAT_KILL, ClientboundPackets1_16_2.PLAYER_COMBAT, 2);
+        protocol.registerClientbound(ClientboundPackets1_17.PLAYER_COMBAT_KILL, ClientboundPackets1_16_2.PLAYER_COMBAT, wrapper -> {
+            wrapper.write(Types.VAR_INT, 2);
+
+            wrapper.passthrough(Types.VAR_INT); // Duration/Player id
+            wrapper.passthrough(Types.INT); // Killer id
+            protocol.getComponentRewriter().processText(wrapper.user(), wrapper.passthrough(Types.COMPONENT));
+        });
     }
 
     @Override
     protected void registerRewrites() {
-        filter().handler((event, meta) -> {
-            meta.setDataType(Types1_16.ENTITY_DATA_TYPES.byId(meta.dataType().typeId()));
+        filter().handler((event, data) -> {
+            data.setDataType(Types1_16.ENTITY_DATA_TYPES.byId(data.dataType().typeId()));
 
-            EntityDataType type = meta.dataType();
+            EntityDataType type = data.dataType();
             if (type == Types1_16.ENTITY_DATA_TYPES.particleType) {
-                Particle particle = (Particle) meta.getValue();
+                Particle particle = (Particle) data.getValue();
                 if (particle.id() == 16) { // Dust / Dust Transition
                     // Remove transition target color values 4-6
                     particle.getArguments().subList(4, 7).clear();
@@ -157,20 +188,20 @@ public final class EntityPacketRewriter1_17 extends EntityRewriter<ClientboundPa
                     return;
                 }
 
-                rewriteParticle(event.user(), particle);
+                protocol.getParticleRewriter().rewriteParticle(event.user(), particle);
             } else if (type == Types1_16.ENTITY_DATA_TYPES.poseType) {
                 // Goat LONG_JUMP added at 6
-                int pose = meta.value();
+                int pose = data.value();
                 if (pose == 6) {
-                    meta.setValue(1); // FALL_FLYING
+                    data.setValue(1); // FALL_FLYING
                 } else if (pose > 6) {
-                    meta.setValue(pose - 1);
+                    data.setValue(pose - 1);
                 }
             }
         });
 
         // Particles have already been handled
-        registerMetaTypeHandler(Types1_16.ENTITY_DATA_TYPES.itemType, null, Types1_16.ENTITY_DATA_TYPES.optionalBlockStateType, null,
+        registerEntityDataTypeHandler(Types1_16.ENTITY_DATA_TYPES.itemType, null, Types1_16.ENTITY_DATA_TYPES.optionalBlockStateType, null,
             Types1_16.ENTITY_DATA_TYPES.componentType, Types1_16.ENTITY_DATA_TYPES.optionalComponentType);
 
         filter().type(EntityTypes1_17.AXOLOTL).cancel(17);
@@ -206,8 +237,8 @@ public final class EntityPacketRewriter1_17 extends EntityRewriter<ClientboundPa
         NumberTag height = tag.getNumberTag("height");
         NumberTag logicalHeight = tag.getNumberTag("logical_height");
         if (minY.asInt() != 0 || height.asInt() > 256 || logicalHeight.asInt() > 256) {
-            if (warn && !warned && !ViaBackwards.getConfig().suppressEmulationWarnings()) {
-                protocol.getLogger().warning("Increased world height is NOT SUPPORTED for 1.16 players and below. They will see a void below y 0 and above 256");
+            if (warn && !warned) {
+                protocol.getLogger().warning("Increased world height is NOT SUPPORTED for 1.16 players and below. They will see a void below y 0 and above 256. You can enable the `bedrock-at-y-0` config option to replace the air with a bedrock layer.");
                 warned = true;
             }
 

common/src/main/java/com/viaversion/viabackwards/protocol/v1_18to1_17_1/Protocol1_18To1_17_1.java

@@ -28,13 +28,13 @@ import com.viaversion.viaversion.api.minecraft.RegistryType;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_17;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandler;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
-import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.data.entity.EntityTrackerBase;
 import com.viaversion.viaversion.protocols.v1_16_4to1_17.packet.ServerboundPackets1_17;
 import com.viaversion.viaversion.protocols.v1_17_1to1_18.packet.ClientboundPackets1_18;
 import com.viaversion.viaversion.protocols.v1_17to1_17_1.packet.ClientboundPackets1_17_1;
 import com.viaversion.viaversion.rewriter.ComponentRewriter;
+import com.viaversion.viaversion.rewriter.ParticleRewriter;
 import com.viaversion.viaversion.rewriter.TagRewriter;
 
 public final class Protocol1_18To1_17_1 extends BackwardsProtocol<ClientboundPackets1_18, ClientboundPackets1_17_1, ServerboundPackets1_17, ServerboundPackets1_17> {
@@ -42,6 +42,7 @@ public final class Protocol1_18To1_17_1 extends BackwardsProtocol<ClientboundPac
     private static final BackwardsMappingData1_18 MAPPINGS = new BackwardsMappingData1_18();
     private final EntityPacketRewriter1_18 entityRewriter = new EntityPacketRewriter1_18(this);
     private final BlockItemPacketRewriter1_18 itemRewriter = new BlockItemPacketRewriter1_18(this);
+    private final ParticleRewriter<ClientboundPackets1_18> particleRewriter = new ParticleRewriter<>(this);
     private final TranslatableRewriter<ClientboundPackets1_18> translatableRewriter = new TranslatableRewriter<>(this, ComponentRewriter.ReadType.JSON);
     private final TagRewriter<ClientboundPackets1_18> tagRewriter = new TagRewriter<>(this);
 
@@ -151,6 +152,11 @@ public final class Protocol1_18To1_17_1 extends BackwardsProtocol<ClientboundPac
         return itemRewriter;
     }
 
+    @Override
+    public ParticleRewriter<ClientboundPackets1_18> getParticleRewriter() {
+        return particleRewriter;
+    }
+
     @Override
     public TranslatableRewriter<ClientboundPackets1_18> getComponentRewriter() {
         return translatableRewriter;

common/src/main/java/com/viaversion/viabackwards/protocol/v1_18to1_17_1/rewriter/EntityPacketRewriter1_18.java

@@ -17,6 +17,9 @@
  */
 package com.viaversion.viabackwards.protocol.v1_18to1_17_1.rewriter;
 
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.nbt.tag.ListTag;
+import com.viaversion.nbt.tag.StringTag;
 import com.viaversion.viabackwards.api.rewriters.EntityRewriter;
 import com.viaversion.viabackwards.protocol.v1_18to1_17_1.Protocol1_18To1_17_1;
 import com.viaversion.viaversion.api.minecraft.Particle;
@@ -24,15 +27,10 @@ import com.viaversion.viaversion.api.minecraft.entities.EntityType;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_17;
 import com.viaversion.viaversion.api.minecraft.entitydata.EntityDataType;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
-import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.api.type.types.version.Types1_17;
 import com.viaversion.viaversion.api.type.types.version.Types1_18;
 import com.viaversion.viaversion.protocols.v1_17_1to1_18.packet.ClientboundPackets1_18;
-import com.viaversion.nbt.tag.CompoundTag;
-import com.viaversion.nbt.tag.ListTag;
-import com.viaversion.nbt.tag.StringTag;
-import com.viaversion.nbt.tag.Tag;
 import com.viaversion.viaversion.util.TagUtil;
 
 public final class EntityPacketRewriter1_18 extends EntityRewriter<ClientboundPackets1_18, Protocol1_18To1_17_1> {
@@ -94,15 +92,15 @@ public final class EntityPacketRewriter1_18 extends EntityRewriter<ClientboundPa
 
     @Override
     protected void registerRewrites() {
-        filter().handler((event, meta) -> {
-            meta.setDataType(Types1_17.ENTITY_DATA_TYPES.byId(meta.dataType().typeId()));
+        filter().handler((event, data) -> {
+            data.setDataType(Types1_17.ENTITY_DATA_TYPES.byId(data.dataType().typeId()));
 
-            EntityDataType type = meta.dataType();
+            EntityDataType type = data.dataType();
             if (type == Types1_17.ENTITY_DATA_TYPES.particleType) {
-                Particle particle = meta.value();
+                Particle particle = data.value();
                 if (particle.id() == 3) { // Block marker
-                    Particle.ParticleData<?> data = particle.getArguments().remove(0);
-                    int blockState = (int) data.getValue();
+                    Particle.ParticleData<?> value = particle.getArguments().remove(0);
+                    int blockState = (int) value.getValue();
                     if (blockState == 7786) { // Light block
                         particle.setId(3);
                     } else {
@@ -112,12 +110,12 @@ public final class EntityPacketRewriter1_18 extends EntityRewriter<ClientboundPa
                     return;
                 }
 
-                rewriteParticle(event.user(), particle);
+                protocol.getParticleRewriter().rewriteParticle(event.user(), particle);
             }
         });
 
         // Particles have already been handled
-        registerMetaTypeHandler(Types1_17.ENTITY_DATA_TYPES.itemType, null, null, null,
+        registerEntityDataTypeHandler(Types1_17.ENTITY_DATA_TYPES.itemType, null, null, null,
             Types1_17.ENTITY_DATA_TYPES.componentType, Types1_17.ENTITY_DATA_TYPES.optionalComponentType);
     }
 

common/src/main/java/com/viaversion/viabackwards/protocol/v1_19_1to1_19/Protocol1_19_1To1_19.java

@@ -297,7 +297,7 @@ public final class Protocol1_19_1To1_19 extends BackwardsProtocol<ClientboundPac
             }
         });
 
-        registerServerbound(State.LOGIN, ServerboundLoginPackets.HELLO.getId(), ServerboundLoginPackets.HELLO.getId(), new PacketHandlers() {
+        registerServerbound(State.LOGIN, ServerboundLoginPackets.HELLO, new PacketHandlers() {
             @Override
             public void register() {
                 map(Types.STRING); // Name
@@ -315,7 +315,7 @@ public final class Protocol1_19_1To1_19 extends BackwardsProtocol<ClientboundPac
             }
         });
 
-        registerClientbound(State.LOGIN, ClientboundLoginPackets.HELLO.getId(), ClientboundLoginPackets.HELLO.getId(), new PacketHandlers() {
+        registerClientbound(State.LOGIN, ClientboundLoginPackets.HELLO, new PacketHandlers() {
             @Override
             public void register() {
                 map(Types.STRING); // Server id
@@ -331,7 +331,7 @@ public final class Protocol1_19_1To1_19 extends BackwardsProtocol<ClientboundPac
             }
         });
 
-        registerServerbound(State.LOGIN, ServerboundLoginPackets.ENCRYPTION_KEY.getId(), ServerboundLoginPackets.ENCRYPTION_KEY.getId(), new PacketHandlers() {
+        registerServerbound(State.LOGIN, ServerboundLoginPackets.ENCRYPTION_KEY, new PacketHandlers() {
             @Override
             public void register() {
                 map(Types.BYTE_ARRAY_PRIMITIVE); // Key
@@ -352,7 +352,7 @@ public final class Protocol1_19_1To1_19 extends BackwardsProtocol<ClientboundPac
             }
         });
 
-        registerClientbound(State.LOGIN, ClientboundLoginPackets.CUSTOM_QUERY.getId(), ClientboundLoginPackets.CUSTOM_QUERY.getId(), new PacketHandlers() {
+        registerClientbound(State.LOGIN, ClientboundLoginPackets.CUSTOM_QUERY, new PacketHandlers() {
             @Override
             public void register() {
                 map(Types.VAR_INT);

common/src/main/java/com/viaversion/viabackwards/protocol/v1_19_3to1_19_1/Protocol1_19_3To1_19_1.java

@@ -21,13 +21,13 @@ import com.google.common.base.Preconditions;
 import com.viaversion.viabackwards.api.BackwardsProtocol;
 import com.viaversion.viabackwards.api.rewriters.SoundRewriter;
 import com.viaversion.viabackwards.api.rewriters.TranslatableRewriter;
+import com.viaversion.viabackwards.protocol.v1_19_1to1_19.Protocol1_19_1To1_19;
 import com.viaversion.viabackwards.protocol.v1_19_3to1_19_1.data.BackwardsMappingData1_19_3;
 import com.viaversion.viabackwards.protocol.v1_19_3to1_19_1.rewriter.BlockItemPacketRewriter1_19_3;
 import com.viaversion.viabackwards.protocol.v1_19_3to1_19_1.rewriter.EntityPacketRewriter1_19_3;
 import com.viaversion.viabackwards.protocol.v1_19_3to1_19_1.storage.ChatSessionStorage;
 import com.viaversion.viabackwards.protocol.v1_19_3to1_19_1.storage.ChatTypeStorage1_19_3;
 import com.viaversion.viabackwards.protocol.v1_19_3to1_19_1.storage.NonceStorage;
-import com.viaversion.viabackwards.protocol.v1_19_1to1_19.Protocol1_19_1To1_19;
 import com.viaversion.viaversion.api.Via;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.minecraft.Holder;
@@ -42,7 +42,6 @@ import com.viaversion.viaversion.api.minecraft.signature.storage.ChatSession1_19
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.protocol.packet.State;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
-import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.api.type.types.BitSetType;
 import com.viaversion.viaversion.api.type.types.ByteArrayType;
@@ -56,6 +55,7 @@ import com.viaversion.viaversion.protocols.v1_19to1_19_1.packet.ClientboundPacke
 import com.viaversion.viaversion.protocols.v1_19to1_19_1.packet.ServerboundPackets1_19_1;
 import com.viaversion.viaversion.rewriter.CommandRewriter;
 import com.viaversion.viaversion.rewriter.ComponentRewriter;
+import com.viaversion.viaversion.rewriter.ParticleRewriter;
 import com.viaversion.viaversion.rewriter.StatisticsRewriter;
 import com.viaversion.viaversion.rewriter.TagRewriter;
 import com.viaversion.viaversion.util.CipherUtil;
@@ -73,6 +73,7 @@ public final class Protocol1_19_3To1_19_1 extends BackwardsProtocol<ClientboundP
     public static final ByteArrayType SIGNATURE_BYTES_TYPE = new ByteArrayType(256);
     private final EntityPacketRewriter1_19_3 entityRewriter = new EntityPacketRewriter1_19_3(this);
     private final BlockItemPacketRewriter1_19_3 itemRewriter = new BlockItemPacketRewriter1_19_3(this);
+    private final ParticleRewriter<ClientboundPackets1_19_3> particleRewriter = new ParticleRewriter<>(this);
     private final TranslatableRewriter<ClientboundPackets1_19_3> translatableRewriter = new TranslatableRewriter<>(this, ComponentRewriter.ReadType.JSON);
     private final TagRewriter<ClientboundPackets1_19_3> tagRewriter = new TagRewriter<>(this);
 
@@ -95,6 +96,8 @@ public final class Protocol1_19_3To1_19_1 extends BackwardsProtocol<ClientboundP
         translatableRewriter.registerPlayerCombatKill(ClientboundPackets1_19_3.PLAYER_COMBAT_KILL);
         translatableRewriter.registerPing();
 
+        particleRewriter.registerLevelParticles1_19(ClientboundPackets1_19_3.LEVEL_PARTICLES);
+
         final SoundRewriter<ClientboundPackets1_19_3> soundRewriter = new SoundRewriter<>(this);
         soundRewriter.registerStopSound(ClientboundPackets1_19_3.STOP_SOUND);
         registerClientbound(ClientboundPackets1_19_3.SOUND, wrapper -> {
@@ -171,7 +174,7 @@ public final class Protocol1_19_3To1_19_1 extends BackwardsProtocol<ClientboundP
         });
 
         // Remove the key once again
-        registerServerbound(State.LOGIN, ServerboundLoginPackets.HELLO.getId(), ServerboundLoginPackets.HELLO.getId(), new PacketHandlers() {
+        registerServerbound(State.LOGIN, ServerboundLoginPackets.HELLO, new PacketHandlers() {
             @Override
             public void register() {
                 map(Types.STRING); // Name
@@ -183,7 +186,7 @@ public final class Protocol1_19_3To1_19_1 extends BackwardsProtocol<ClientboundP
                 });
             }
         });
-        registerClientbound(State.LOGIN, ClientboundLoginPackets.HELLO.getId(), ClientboundLoginPackets.HELLO.getId(), new PacketHandlers() {
+        registerClientbound(State.LOGIN, ClientboundLoginPackets.HELLO, new PacketHandlers() {
             @Override
             public void register() {
                 map(Types.STRING); // Server id
@@ -198,7 +201,7 @@ public final class Protocol1_19_3To1_19_1 extends BackwardsProtocol<ClientboundP
                 });
             }
         });
-        registerServerbound(State.LOGIN, ServerboundLoginPackets.ENCRYPTION_KEY.getId(), ServerboundLoginPackets.ENCRYPTION_KEY.getId(), new PacketHandlers() {
+        registerServerbound(State.LOGIN, ServerboundLoginPackets.ENCRYPTION_KEY, new PacketHandlers() {
             @Override
             public void register() {
                 map(Types.BYTE_ARRAY_PRIMITIVE); // Keys
@@ -412,6 +415,11 @@ public final class Protocol1_19_3To1_19_1 extends BackwardsProtocol<ClientboundP
         return itemRewriter;
     }
 
+    @Override
+    public ParticleRewriter<ClientboundPackets1_19_3> getParticleRewriter() {
+        return particleRewriter;
+    }
+
     @Override
     public EntityPacketRewriter1_19_3 getEntityRewriter() {
         return entityRewriter;

common/src/main/java/com/viaversion/viabackwards/protocol/v1_19_3to1_19_1/rewriter/BlockItemPacketRewriter1_19_3.java

@@ -21,7 +21,6 @@ import com.viaversion.viabackwards.api.rewriters.BackwardsItemRewriter;
 import com.viaversion.viabackwards.protocol.v1_19_3to1_19_1.Protocol1_19_3To1_19_1;
 import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
-import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.api.type.types.chunk.ChunkType1_18;
 import com.viaversion.viaversion.protocols.v1_19_1to1_19_3.packet.ClientboundPackets1_19_3;
@@ -55,7 +54,6 @@ public final class BlockItemPacketRewriter1_19_3 extends BackwardsItemRewriter<C
         registerMerchantOffers1_19(ClientboundPackets1_19_3.MERCHANT_OFFERS);
         registerSetCreativeModeSlot(ServerboundPackets1_19_1.SET_CREATIVE_MODE_SLOT);
         registerContainerSetData(ClientboundPackets1_19_3.CONTAINER_SET_DATA);
-        registerLevelParticles1_19(ClientboundPackets1_19_3.LEVEL_PARTICLES);
 
         protocol.registerClientbound(ClientboundPackets1_19_3.EXPLODE, new PacketHandlers() {
             @Override
@@ -73,7 +71,7 @@ public final class BlockItemPacketRewriter1_19_3 extends BackwardsItemRewriter<C
                 final String type = Key.stripMinecraftNamespace(wrapper.passthrough(Types.STRING));
                 wrapper.passthrough(Types.STRING); // Recipe Identifier
                 switch (type) {
-                    case "crafting_shapeless": {
+                    case "crafting_shapeless" -> {
                         wrapper.passthrough(Types.STRING); // Group
                         wrapper.read(Types.VAR_INT); // Crafting book category
                         final int ingredients = wrapper.passthrough(Types.VAR_INT);
@@ -84,9 +82,8 @@ public final class BlockItemPacketRewriter1_19_3 extends BackwardsItemRewriter<C
                             }
                         }
                         handleItemToClient(wrapper.user(), wrapper.passthrough(Types.ITEM1_13_2)); // Result
-                        break;
                     }
-                    case "crafting_shaped": {
+                    case "crafting_shaped" -> {
                         final int ingredients = wrapper.passthrough(Types.VAR_INT) * wrapper.passthrough(Types.VAR_INT);
                         wrapper.passthrough(Types.STRING); // Group
                         wrapper.read(Types.VAR_INT); // Crafting book category
@@ -97,12 +94,8 @@ public final class BlockItemPacketRewriter1_19_3 extends BackwardsItemRewriter<C
                             }
                         }
                         handleItemToClient(wrapper.user(), wrapper.passthrough(Types.ITEM1_13_2)); // Result
-                        break;
                     }
-                    case "smelting":
-                    case "campfire_cooking":
-                    case "blasting":
-                    case "smoking":
+                    case "smelting", "campfire_cooking", "blasting", "smoking" -> {
                         wrapper.passthrough(Types.STRING); // Group
                         wrapper.read(Types.VAR_INT); // Crafting book category
                         final Item[] items = wrapper.passthrough(Types.ITEM1_13_2_ARRAY); // Ingredients
@@ -112,25 +105,13 @@ public final class BlockItemPacketRewriter1_19_3 extends BackwardsItemRewriter<C
                         handleItemToClient(wrapper.user(), wrapper.passthrough(Types.ITEM1_13_2)); // Result
                         wrapper.passthrough(Types.FLOAT); // EXP
                         wrapper.passthrough(Types.VAR_INT); // Cooking time
-                        break;
-                    case "crafting_special_armordye":
-                    case "crafting_special_bookcloning":
-                    case "crafting_special_mapcloning":
-                    case "crafting_special_mapextending":
-                    case "crafting_special_firework_rocket":
-                    case "crafting_special_firework_star":
-                    case "crafting_special_firework_star_fade":
-                    case "crafting_special_tippedarrow":
-                    case "crafting_special_bannerduplicate":
-                    case "crafting_special_shielddecoration":
-                    case "crafting_special_shulkerboxcoloring":
-                    case "crafting_special_suspiciousstew":
-                    case "crafting_special_repairitem":
-                        wrapper.read(Types.VAR_INT); // Crafting book category
-                        break;
-                    default:
-                        recipeRewriter.handleRecipeType(wrapper, type);
-                        break;
+                    }
+                    case "crafting_special_armordye", "crafting_special_bookcloning", "crafting_special_mapcloning",
+                         "crafting_special_mapextending", "crafting_special_firework_rocket", "crafting_special_firework_star",
+                         "crafting_special_firework_star_fade", "crafting_special_tippedarrow", "crafting_special_bannerduplicate",
+                         "crafting_special_shielddecoration", "crafting_special_shulkerboxcoloring", "crafting_special_suspiciousstew",
+                         "crafting_special_repairitem" -> wrapper.read(Types.VAR_INT); // Crafting book category
+                    default -> recipeRewriter.handleRecipeType(wrapper, type);
                 }
             }
         });

common/src/main/java/com/viaversion/viabackwards/protocol/v1_19_3to1_19_1/rewriter/EntityPacketRewriter1_19_3.java

@@ -27,9 +27,7 @@ import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_19_3;
 import com.viaversion.viaversion.api.minecraft.signature.storage.ChatSession1_19_3;
 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;
-import com.viaversion.viaversion.api.type.types.BitSetType;
 import com.viaversion.viaversion.api.type.types.version.Types1_19;
 import com.viaversion.viaversion.api.type.types.version.Types1_19_3;
 import com.viaversion.viaversion.libs.gson.JsonElement;
@@ -46,7 +44,6 @@ import org.checkerframework.checker.nullness.qual.Nullable;
 
 public final class EntityPacketRewriter1_19_3 extends EntityRewriter<ClientboundPackets1_19_3, Protocol1_19_3To1_19_1> {
 
-    private static final BitSetType PROFILE_ACTIONS_ENUM_TYPE = new BitSetType(6);
     private static final int[] PROFILE_ACTIONS = {2, 3, 4, 5}; // Ignore initialize chat; add player already handled before
     private static final int ADD_PLAYER = 0;
     private static final int INITIALIZE_CHAT = 1;
@@ -124,7 +121,7 @@ public final class EntityPacketRewriter1_19_3 extends EntityRewriter<Clientbound
 
         protocol.registerClientbound(ClientboundPackets1_19_3.PLAYER_INFO_UPDATE, ClientboundPackets1_19_1.PLAYER_INFO, wrapper -> {
             wrapper.cancel();
-            final BitSet actions = wrapper.read(PROFILE_ACTIONS_ENUM_TYPE);
+            final BitSet actions = wrapper.read(Types.PROFILE_ACTIONS_ENUM1_19_3);
             final int entries = wrapper.read(Types.VAR_INT);
             if (actions.get(ADD_PLAYER)) {
                 // Special case, as we need to write everything into one action
@@ -230,25 +227,25 @@ public final class EntityPacketRewriter1_19_3 extends EntityRewriter<Clientbound
 
     @Override
     public void registerRewrites() {
-        filter().handler((event, meta) -> {
-            final int id = meta.dataType().typeId();
+        filter().handler((event, data) -> {
+            final int id = data.dataType().typeId();
             if (id > 2) {
-                meta.setDataType(Types1_19.ENTITY_DATA_TYPES.byId(id - 1)); // long added
+                data.setDataType(Types1_19.ENTITY_DATA_TYPES.byId(id - 1)); // long added
             } else if (id != 2) {
-                meta.setDataType(Types1_19.ENTITY_DATA_TYPES.byId(id));
+                data.setDataType(Types1_19.ENTITY_DATA_TYPES.byId(id));
             }
         });
-        registerMetaTypeHandler(Types1_19.ENTITY_DATA_TYPES.itemType, null, Types1_19.ENTITY_DATA_TYPES.optionalBlockStateType, Types1_19.ENTITY_DATA_TYPES.particleType,
+        registerEntityDataTypeHandler(Types1_19.ENTITY_DATA_TYPES.itemType, null, Types1_19.ENTITY_DATA_TYPES.optionalBlockStateType, Types1_19.ENTITY_DATA_TYPES.particleType,
             Types1_19.ENTITY_DATA_TYPES.componentType, Types1_19.ENTITY_DATA_TYPES.optionalComponentType);
         registerBlockStateHandler(EntityTypes1_19_3.ABSTRACT_MINECART, 11);
 
-        filter().dataType(Types1_19.ENTITY_DATA_TYPES.poseType).handler((event, meta) -> {
+        filter().dataType(Types1_19.ENTITY_DATA_TYPES.poseType).handler((event, data) -> {
             // Sitting pose added
-            final int pose = meta.value();
+            final int pose = data.value();
             if (pose == 10) {
-                meta.setValue(0); // Standing
+                data.setValue(0); // Standing
             } else if (pose > 10) {
-                meta.setValue(pose - 1);
+                data.setValue(pose - 1);
             }
         });
 

common/src/main/java/com/viaversion/viabackwards/protocol/v1_19_4to1_19_3/Protocol1_19_4To1_19_3.java

@@ -23,11 +23,10 @@ import com.viaversion.viabackwards.api.rewriters.SoundRewriter;
 import com.viaversion.viabackwards.api.rewriters.TranslatableRewriter;
 import com.viaversion.viabackwards.protocol.v1_19_4to1_19_3.rewriter.BlockItemPacketRewriter1_19_4;
 import com.viaversion.viabackwards.protocol.v1_19_4to1_19_3.rewriter.EntityPacketRewriter1_19_4;
+import com.viaversion.viabackwards.protocol.v1_19_4to1_19_3.storage.EntityTracker1_19_4;
 import com.viaversion.viaversion.api.connection.UserConnection;
-import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_19_4;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.type.Types;
-import com.viaversion.viaversion.data.entity.EntityTrackerBase;
 import com.viaversion.viaversion.libs.gson.JsonElement;
 import com.viaversion.viaversion.protocols.v1_19_1to1_19_3.packet.ClientboundPackets1_19_3;
 import com.viaversion.viaversion.protocols.v1_19_1to1_19_3.packet.ServerboundPackets1_19_3;
@@ -36,6 +35,7 @@ import com.viaversion.viaversion.protocols.v1_19_3to1_19_4.packet.ClientboundPac
 import com.viaversion.viaversion.protocols.v1_19_3to1_19_4.packet.ServerboundPackets1_19_4;
 import com.viaversion.viaversion.rewriter.CommandRewriter;
 import com.viaversion.viaversion.rewriter.ComponentRewriter;
+import com.viaversion.viaversion.rewriter.ParticleRewriter;
 import com.viaversion.viaversion.rewriter.StatisticsRewriter;
 import com.viaversion.viaversion.rewriter.TagRewriter;
 import java.nio.charset.StandardCharsets;
@@ -46,6 +46,7 @@ public final class Protocol1_19_4To1_19_3 extends BackwardsProtocol<ClientboundP
     public static final BackwardsMappingData MAPPINGS = new BackwardsMappingData("1.19.4", "1.19.3", Protocol1_19_3To1_19_4.class);
     private final EntityPacketRewriter1_19_4 entityRewriter = new EntityPacketRewriter1_19_4(this);
     private final BlockItemPacketRewriter1_19_4 itemRewriter = new BlockItemPacketRewriter1_19_4(this);
+    private final ParticleRewriter<ClientboundPackets1_19_4> particleRewriter = new ParticleRewriter<>(this);
     private final TranslatableRewriter<ClientboundPackets1_19_4> translatableRewriter = new TranslatableRewriter<>(this, ComponentRewriter.ReadType.JSON);
     private final TagRewriter<ClientboundPackets1_19_4> tagRewriter = new TagRewriter<>(this);
 
@@ -74,25 +75,20 @@ public final class Protocol1_19_4To1_19_3 extends BackwardsProtocol<ClientboundP
         translatableRewriter.registerComponentPacket(ClientboundPackets1_19_4.DISGUISED_CHAT);
         translatableRewriter.registerPing();
 
+        particleRewriter.registerLevelParticles1_19(ClientboundPackets1_19_4.LEVEL_PARTICLES);
+
         new CommandRewriter<>(this) {
             @Override
             public void handleArgument(final PacketWrapper wrapper, final String argumentType) {
                 switch (argumentType) {
-                    case "minecraft:heightmap":
-                        wrapper.write(Types.VAR_INT, 0);
-                        break;
-                    case "minecraft:time":
-                        wrapper.read(Types.INT); // Minimum
-                        break;
-                    case "minecraft:resource":
-                    case "minecraft:resource_or_tag":
+                    case "minecraft:heightmap" -> wrapper.write(Types.VAR_INT, 0);
+                    case "minecraft:time" -> wrapper.read(Types.INT); // Minimum
+                    case "minecraft:resource", "minecraft:resource_or_tag" -> {
                         final String resource = wrapper.read(Types.STRING);
                         // Replace damage types with... something
                         wrapper.write(Types.STRING, resource.equals("minecraft:damage_type") ? "minecraft:mob_effect" : resource);
-                        break;
-                    default:
-                        super.handleArgument(wrapper, argumentType);
-                        break;
+                    }
+                    default -> super.handleArgument(wrapper, argumentType);
                 }
             }
         }.registerDeclareCommands1_19(ClientboundPackets1_19_4.COMMANDS);
@@ -117,7 +113,7 @@ public final class Protocol1_19_4To1_19_3 extends BackwardsProtocol<ClientboundP
 
     @Override
     public void init(final UserConnection user) {
-        addEntityTracker(user, new EntityTrackerBase(user, EntityTypes1_19_4.PLAYER));
+        addEntityTracker(user, new EntityTracker1_19_4(user));
     }
 
     @Override
@@ -130,6 +126,11 @@ public final class Protocol1_19_4To1_19_3 extends BackwardsProtocol<ClientboundP
         return itemRewriter;
     }
 
+    @Override
+    public ParticleRewriter<ClientboundPackets1_19_4> getParticleRewriter() {
+        return particleRewriter;
+    }
+
     @Override
     public EntityPacketRewriter1_19_4 getEntityRewriter() {
         return entityRewriter;
@@ -144,4 +145,4 @@ public final class Protocol1_19_4To1_19_3 extends BackwardsProtocol<ClientboundP
     public TagRewriter<ClientboundPackets1_19_4> getTagRewriter() {
         return tagRewriter;
     }
-}
+}

common/src/main/java/com/viaversion/viabackwards/protocol/v1_19_4to1_19_3/rewriter/BlockItemPacketRewriter1_19_4.java

@@ -73,7 +73,6 @@ public final class BlockItemPacketRewriter1_19_4 extends BackwardsItemRewriter<C
         registerMerchantOffers1_19(ClientboundPackets1_19_4.MERCHANT_OFFERS);
         registerSetCreativeModeSlot(ServerboundPackets1_19_3.SET_CREATIVE_MODE_SLOT);
         registerContainerSetData(ClientboundPackets1_19_4.CONTAINER_SET_DATA);
-        registerLevelParticles1_19(ClientboundPackets1_19_4.LEVEL_PARTICLES);
 
         final RecipeRewriter1_19_3<ClientboundPackets1_19_4> recipeRewriter = new RecipeRewriter1_19_3<>(protocol) {
             @Override
@@ -121,4 +120,4 @@ public final class BlockItemPacketRewriter1_19_4 extends BackwardsItemRewriter<C
             wrapper.set(Types.VAR_INT, 0, newSize);
         });
     }
-}
+}

common/src/main/java/com/viaversion/viabackwards/protocol/v1_19_4to1_19_3/rewriter/EntityPacketRewriter1_19_4.java

@@ -17,22 +17,29 @@
  */
 package com.viaversion.viabackwards.protocol.v1_19_4to1_19_3.rewriter;
 
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.nbt.tag.ListTag;
+import com.viaversion.nbt.tag.NumberTag;
+import com.viaversion.viabackwards.api.entities.storage.EntityPositionHandler;
 import com.viaversion.viabackwards.api.entities.storage.EntityReplacement;
 import com.viaversion.viabackwards.api.rewriters.EntityRewriter;
 import com.viaversion.viabackwards.protocol.v1_19_4to1_19_3.Protocol1_19_4To1_19_3;
+import com.viaversion.viabackwards.protocol.v1_19_4to1_19_3.storage.EntityTracker1_19_4;
+import com.viaversion.viabackwards.protocol.v1_19_4to1_19_3.storage.LinkedEntityStorage;
+import com.viaversion.viaversion.api.data.entity.StoredEntityData;
 import com.viaversion.viaversion.api.minecraft.entities.EntityType;
+import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_19_3;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_19_4;
 import com.viaversion.viaversion.api.minecraft.entitydata.EntityData;
+import com.viaversion.viaversion.api.minecraft.item.Item;
+import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
+import com.viaversion.viaversion.api.protocol.remapper.PacketHandler;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.api.type.types.version.Types1_19_3;
 import com.viaversion.viaversion.api.type.types.version.Types1_19_4;
-import com.viaversion.viaversion.libs.gson.JsonElement;
 import com.viaversion.viaversion.protocols.v1_19_1to1_19_3.packet.ClientboundPackets1_19_3;
 import com.viaversion.viaversion.protocols.v1_19_3to1_19_4.packet.ClientboundPackets1_19_4;
-import com.viaversion.nbt.tag.CompoundTag;
-import com.viaversion.nbt.tag.ListTag;
-import com.viaversion.nbt.tag.NumberTag;
 import com.viaversion.viaversion.util.TagUtil;
 
 public final class EntityPacketRewriter1_19_4 extends EntityRewriter<ClientboundPackets1_19_4, Protocol1_19_4To1_19_3> {
@@ -43,10 +50,45 @@ public final class EntityPacketRewriter1_19_4 extends EntityRewriter<Clientbound
 
     @Override
     public void registerPackets() {
-        registerTrackerWithData1_19(ClientboundPackets1_19_4.ADD_ENTITY, EntityTypes1_19_4.FALLING_BLOCK);
         registerRemoveEntities(ClientboundPackets1_19_4.REMOVE_ENTITIES);
         registerSetEntityData(ClientboundPackets1_19_4.SET_ENTITY_DATA, Types1_19_4.ENTITY_DATA_LIST, Types1_19_3.ENTITY_DATA_LIST);
 
+        protocol.registerClientbound(ClientboundPackets1_19_4.ADD_ENTITY, new PacketHandlers() {
+            @Override
+            public void register() {
+                map(Types.VAR_INT); // Entity id
+                map(Types.UUID); // Entity UUID
+                map(Types.VAR_INT); // Entity type
+                map(Types.DOUBLE); // X
+                map(Types.DOUBLE); // Y
+                map(Types.DOUBLE); // Z
+                map(Types.BYTE); // Pitch
+                map(Types.BYTE); // Yaw
+                map(Types.BYTE); // Head yaw
+                map(Types.VAR_INT); // Data
+                handler(wrapper -> {
+                    final int entityId = wrapper.get(Types.VAR_INT, 0);
+                    final int entityType = wrapper.get(Types.VAR_INT, 1);
+
+                    // First track (and remap) entity, then put storage for block display entity
+                    getSpawnTrackerWithDataHandler1_19(EntityTypes1_19_4.FALLING_BLOCK).handle(wrapper);
+                    if (entityType != EntityTypes1_19_4.BLOCK_DISPLAY.getId()) {
+                        return;
+                    }
+
+                    final StoredEntityData data = tracker(wrapper.user()).entityData(entityId);
+                    if (data != null) {
+                        final LinkedEntityStorage storage = new LinkedEntityStorage();
+                        final double x = wrapper.get(Types.DOUBLE, 0);
+                        final double y = wrapper.get(Types.DOUBLE, 1);
+                        final double z = wrapper.get(Types.DOUBLE, 2);
+                        storage.setPosition(x, y, z);
+                        data.put(storage);
+                    }
+                });
+            }
+        });
+
         protocol.registerClientbound(ClientboundPackets1_19_4.LOGIN, new PacketHandlers() {
             @Override
             public void register() {
@@ -127,43 +169,111 @@ public final class EntityPacketRewriter1_19_4 extends EntityRewriter<Clientbound
                 handler(worldDataTrackerHandlerByKey());
             }
         });
+
+        protocol.registerClientbound(ClientboundPackets1_19_4.UPDATE_MOB_EFFECT, wrapper -> {
+            wrapper.passthrough(Types.VAR_INT); // Entity id
+            wrapper.passthrough(Types.VAR_INT); // Effect id
+            wrapper.passthrough(Types.BYTE); // Amplifier
+
+            // Handle inifinite duration. Use a value the client still accepts without bugging out the display while still being practically infinite
+            final int duration = wrapper.read(Types.VAR_INT);
+            wrapper.write(Types.VAR_INT, duration == -1 ? 999999 : duration);
+        });
+
+        // Track the position of block display entities to later spawn the linked entities, we will put them
+        // as passengers but the spawn position needs to be in the players view distance
+
+        protocol.registerClientbound(ClientboundPackets1_19_4.TELEPORT_ENTITY, wrapper -> {
+            final int entityId = wrapper.passthrough(Types.VAR_INT);
+            final double x = wrapper.passthrough(Types.DOUBLE);
+            final double y = wrapper.passthrough(Types.DOUBLE);
+            final double z = wrapper.passthrough(Types.DOUBLE);
+
+            final EntityTracker1_19_4 tracker = tracker(wrapper.user());
+            final LinkedEntityStorage storage = tracker.linkedEntityStorage(entityId);
+            if (storage == null) {
+                return;
+            }
+            storage.setPosition(x, y, z);
+        });
+
+        final PacketHandler entityPositionHandler = wrapper -> {
+            final int entityId = wrapper.passthrough(Types.VAR_INT);
+            final double x = wrapper.passthrough(Types.SHORT) / EntityPositionHandler.RELATIVE_MOVE_FACTOR;
+            final double y = wrapper.passthrough(Types.SHORT) / EntityPositionHandler.RELATIVE_MOVE_FACTOR;
+            final double z = wrapper.passthrough(Types.SHORT) / EntityPositionHandler.RELATIVE_MOVE_FACTOR;
+
+            final EntityTracker1_19_4 tracker = tracker(wrapper.user());
+            final LinkedEntityStorage storage = tracker.linkedEntityStorage(entityId);
+            if (storage == null) {
+                return;
+            }
+            storage.addRelativePosition(x, y, z);
+        };
+
+        protocol.registerClientbound(ClientboundPackets1_19_4.MOVE_ENTITY_POS, entityPositionHandler);
+        protocol.registerClientbound(ClientboundPackets1_19_4.MOVE_ENTITY_POS_ROT, entityPositionHandler);
     }
 
     @Override
     public void registerRewrites() {
-        filter().handler((event, meta) -> {
-            int id = meta.dataType().typeId();
+        filter().handler((event, data) -> {
+            int id = data.dataType().typeId();
             if (id >= 25) { // Sniffer state, Vector3f, Quaternion types
                 return;
             } else if (id >= 15) { // Optional block state - just map down to block state
                 id--;
             }
 
-            meta.setDataType(Types1_19_3.ENTITY_DATA_TYPES.byId(id));
+            data.setDataType(Types1_19_3.ENTITY_DATA_TYPES.byId(id));
         });
-        registerMetaTypeHandler(Types1_19_3.ENTITY_DATA_TYPES.itemType, null, Types1_19_3.ENTITY_DATA_TYPES.optionalBlockStateType, Types1_19_3.ENTITY_DATA_TYPES.particleType,
+        registerEntityDataTypeHandler(Types1_19_3.ENTITY_DATA_TYPES.itemType, null, Types1_19_3.ENTITY_DATA_TYPES.optionalBlockStateType, Types1_19_3.ENTITY_DATA_TYPES.particleType,
             Types1_19_3.ENTITY_DATA_TYPES.componentType, Types1_19_3.ENTITY_DATA_TYPES.optionalComponentType);
         registerBlockStateHandler(EntityTypes1_19_4.ABSTRACT_MINECART, 11);
 
-        filter().type(EntityTypes1_19_4.BOAT).index(11).handler((event, meta) -> {
-            final int boatType = meta.value();
+        filter().type(EntityTypes1_19_4.BOAT).index(11).handler((event, data) -> {
+            final int boatType = data.value();
             if (boatType > 4) { // Cherry
-                meta.setValue(boatType - 1);
+                data.setValue(boatType - 1);
             }
         });
 
-        filter().type(EntityTypes1_19_4.TEXT_DISPLAY).index(22).handler(((event, meta) -> {
+        filter().type(EntityTypes1_19_4.TEXT_DISPLAY).index(22).handler(((event, data) -> {
             // Send as custom display name
             event.setIndex(2);
-            meta.setDataType(Types1_19_3.ENTITY_DATA_TYPES.optionalComponentType);
+            data.setDataType(Types1_19_3.ENTITY_DATA_TYPES.optionalComponentType);
             event.createExtraData(new EntityData(3, Types1_19_3.ENTITY_DATA_TYPES.booleanType, true)); // Show custom name
-
-            final JsonElement element = meta.value();
-            protocol.getComponentRewriter().processText(event.user(), element);
         }));
-        filter().type(EntityTypes1_19_4.DISPLAY).handler((event, meta) -> {
-            // TODO Maybe spawn an extra entity to ride the armor stand for blocks and items
-            // Remove a large heap of display metadata
+        filter().type(EntityTypes1_19_4.BLOCK_DISPLAY).index(22).handler((event, data) -> {
+            final int value = data.value();
+
+            final EntityTracker1_19_4 tracker = tracker(event.user());
+            tracker.clearLinkedEntities(event.entityId());
+
+            final LinkedEntityStorage storage = tracker.linkedEntityStorage(event.entityId());
+            if (storage == null) {
+                return;
+            }
+            final int linkedEntity = tracker.spawnEntity(EntityTypes1_19_3.FALLING_BLOCK, storage.x(), storage.y(), storage.z(), value);
+            storage.setEntities(linkedEntity);
+
+            final PacketWrapper wrapper = PacketWrapper.create(ClientboundPackets1_19_3.SET_PASSENGERS, event.user());
+            wrapper.write(Types.VAR_INT, event.entityId()); // Entity id
+            wrapper.write(Types.VAR_INT_ARRAY_PRIMITIVE, new int[] { linkedEntity }); // Passenger entity ids
+            wrapper.send(Protocol1_19_4To1_19_3.class);
+        });
+        filter().type(EntityTypes1_19_4.ITEM_DISPLAY).index(22).handler((event, data) -> {
+            final Item value = data.value();
+
+            final PacketWrapper setEquipment = PacketWrapper.create(ClientboundPackets1_19_3.SET_EQUIPMENT, event.user());
+            setEquipment.write(Types.VAR_INT, event.entityId()); // Entity id
+            setEquipment.write(Types.BYTE, (byte) 5); // Slot - head
+            setEquipment.write(Types.ITEM1_13_2, value);
+
+            setEquipment.send(Protocol1_19_4To1_19_3.class);
+        });
+        filter().type(EntityTypes1_19_4.DISPLAY).handler((event, data) -> {
+            // Remove a large heap of display entity data
             if (event.index() > 7) {
                 event.cancel();
             }
@@ -183,16 +293,16 @@ public final class EntityPacketRewriter1_19_4 extends EntityRewriter<Clientbound
     public void onMappingDataLoaded() {
         mapTypes();
 
-        final EntityReplacement.MetaCreator displayMetaCreator = storage -> {
+        final EntityReplacement.EntityDataCreator displayDataCreator = storage -> {
             storage.add(new EntityData(0, Types1_19_3.ENTITY_DATA_TYPES.byteType, (byte) 0x20)); // Invisible
             storage.add(new EntityData(5, Types1_19_3.ENTITY_DATA_TYPES.booleanType, true)); // No gravity
             storage.add(new EntityData(15, Types1_19_3.ENTITY_DATA_TYPES.byteType, (byte) (0x01 | 0x10))); // Small marker
         };
-        mapEntityTypeWithData(EntityTypes1_19_4.TEXT_DISPLAY, EntityTypes1_19_4.ARMOR_STAND).spawnMetadata(displayMetaCreator);
-        mapEntityTypeWithData(EntityTypes1_19_4.ITEM_DISPLAY, EntityTypes1_19_4.ARMOR_STAND).spawnMetadata(displayMetaCreator);
-        mapEntityTypeWithData(EntityTypes1_19_4.BLOCK_DISPLAY, EntityTypes1_19_4.ARMOR_STAND).spawnMetadata(displayMetaCreator);
+        mapEntityTypeWithData(EntityTypes1_19_4.TEXT_DISPLAY, EntityTypes1_19_4.ARMOR_STAND).spawnEntityData(displayDataCreator);
+        mapEntityTypeWithData(EntityTypes1_19_4.ITEM_DISPLAY, EntityTypes1_19_4.ARMOR_STAND).spawnEntityData(displayDataCreator);
+        mapEntityTypeWithData(EntityTypes1_19_4.BLOCK_DISPLAY, EntityTypes1_19_4.ARMOR_STAND).spawnEntityData(displayDataCreator);
 
-        mapEntityTypeWithData(EntityTypes1_19_4.INTERACTION, EntityTypes1_19_4.ARMOR_STAND).spawnMetadata(displayMetaCreator); // Not much we can do about this one
+        mapEntityTypeWithData(EntityTypes1_19_4.INTERACTION, EntityTypes1_19_4.ARMOR_STAND).spawnEntityData(displayDataCreator); // Not much we can do about this one
 
         mapEntityTypeWithData(EntityTypes1_19_4.SNIFFER, EntityTypes1_19_4.RAVAGER).jsonName();
     }

common/src/main/java/com/viaversion/viabackwards/protocol/v1_19_4to1_19_3/storage/EntityTracker1_19_4.java

@@ -0,0 +1,104 @@
+/*
+ * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards
+ * 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.viabackwards.protocol.v1_19_4to1_19_3.storage;
+
+import com.viaversion.viabackwards.protocol.v1_19_4to1_19_3.Protocol1_19_4To1_19_3;
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.data.entity.TrackedEntity;
+import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_19_3;
+import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_19_4;
+import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
+import com.viaversion.viaversion.api.type.Types;
+import com.viaversion.viaversion.data.entity.EntityTrackerBase;
+import com.viaversion.viaversion.libs.fastutil.ints.IntOpenHashSet;
+import com.viaversion.viaversion.libs.fastutil.ints.IntSet;
+import com.viaversion.viaversion.protocols.v1_19_1to1_19_3.packet.ClientboundPackets1_19_3;
+import java.util.UUID;
+import java.util.concurrent.ThreadLocalRandom;
+
+public final class EntityTracker1_19_4 extends EntityTrackerBase {
+
+    private final IntSet generatedEntities = new IntOpenHashSet(); // Track entities spawned to prevent duplicated entity ids
+
+    public EntityTracker1_19_4(final UserConnection connection) {
+        super(connection, EntityTypes1_19_4.PLAYER);
+    }
+
+    public int spawnEntity(final EntityTypes1_19_3 entityType, final double x, final double y, final double z, final int data) {
+        final int entityId = nextEntityId();
+
+        final PacketWrapper addEntity = PacketWrapper.create(ClientboundPackets1_19_3.ADD_ENTITY, user());
+        addEntity.write(Types.VAR_INT, entityId); // Entity id
+        addEntity.write(Types.UUID, UUID.randomUUID()); // Entity UUID
+        addEntity.write(Types.VAR_INT, entityType.getId()); // Entity type
+        addEntity.write(Types.DOUBLE, x); // X
+        addEntity.write(Types.DOUBLE, y); // Y
+        addEntity.write(Types.DOUBLE, z); // Z
+        addEntity.write(Types.BYTE, (byte) 0); // Pitch
+        addEntity.write(Types.BYTE, (byte) 0); // Yaw
+        addEntity.write(Types.BYTE, (byte) 0); // Head yaw
+        addEntity.write(Types.VAR_INT, data); // Data
+        addEntity.write(Types.SHORT, (short) 0); // Velocity X
+        addEntity.write(Types.SHORT, (short) 0); // Velocity Y
+        addEntity.write(Types.SHORT, (short) 0); // Velocity Z
+
+        addEntity.send(Protocol1_19_4To1_19_3.class);
+
+        generatedEntities.add(entityId);
+        return entityId;
+    }
+
+    @Override
+    public void clearEntities() {
+        for (final int id : entities.keySet()) {
+            clearLinkedEntities(id);
+        }
+        super.clearEntities();
+    }
+
+    @Override
+    public void removeEntity(final int id) {
+        clearLinkedEntities(id);
+        super.removeEntity(id);
+    }
+
+    public void clearLinkedEntities(final int id) {
+        final LinkedEntityStorage storage = linkedEntityStorage(id);
+        if (storage != null && storage.entities() != null) {
+            storage.remove(user());
+            generatedEntities.remove(id);
+        }
+    }
+
+    public LinkedEntityStorage linkedEntityStorage(final int id) {
+        final TrackedEntity entity = entity(id);
+        if (entity != null && entity.hasData()) {
+            return entity.data().get(LinkedEntityStorage.class);
+        }
+        return null;
+    }
+
+    private int nextEntityId() {
+        final int entityId = -ThreadLocalRandom.current().nextInt(10_000);
+        if (generatedEntities.contains(entityId)) {
+            return nextEntityId();
+        }
+        return entityId;
+    }
+
+}

common/src/main/java/com/viaversion/viabackwards/protocol/v1_19_4to1_19_3/storage/LinkedEntityStorage.java

@@ -0,0 +1,46 @@
+/*
+ * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards
+ * 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.viabackwards.protocol.v1_19_4to1_19_3.storage;
+
+import com.viaversion.viabackwards.api.entities.storage.EntityPositionStorage;
+import com.viaversion.viabackwards.protocol.v1_19_4to1_19_3.Protocol1_19_4To1_19_3;
+import com.viaversion.viaversion.api.connection.StorableObject;
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
+import com.viaversion.viaversion.api.type.Types;
+import com.viaversion.viaversion.protocols.v1_19_1to1_19_3.packet.ClientboundPackets1_19_3;
+
+public class LinkedEntityStorage extends EntityPositionStorage implements StorableObject {
+
+    private int[] entities;
+
+    public int[] entities() {
+        return entities;
+    }
+
+    public void setEntities(final int... entities) {
+        this.entities = entities;
+    }
+
+    public void remove(final UserConnection connection) {
+        final PacketWrapper wrapper = PacketWrapper.create(ClientboundPackets1_19_3.REMOVE_ENTITIES, connection);
+        wrapper.write(Types.VAR_INT_ARRAY_PRIMITIVE, entities);
+
+        wrapper.send(Protocol1_19_4To1_19_3.class);
+    }
+}

common/src/main/java/com/viaversion/viabackwards/protocol/v1_19to1_18_2/Protocol1_19To1_18_2.java

@@ -18,21 +18,21 @@
 package com.viaversion.viabackwards.protocol.v1_19to1_18_2;
 
 import com.google.common.primitives.Longs;
-import com.viaversion.viabackwards.ViaBackwards;
+import com.viaversion.nbt.tag.CompoundTag;
 import com.viaversion.viabackwards.api.BackwardsProtocol;
 import com.viaversion.viabackwards.api.rewriters.SoundRewriter;
 import com.viaversion.viabackwards.api.rewriters.TranslatableRewriter;
+import com.viaversion.viabackwards.protocol.v1_19_1to1_19.Protocol1_19_1To1_19;
 import com.viaversion.viabackwards.protocol.v1_19to1_18_2.data.BackwardsMappingData1_19;
-import com.viaversion.viabackwards.protocol.v1_19to1_18_2.rewriter.CommandRewriter1_19;
 import com.viaversion.viabackwards.protocol.v1_19to1_18_2.rewriter.BlockItemPacketRewriter1_19;
+import com.viaversion.viabackwards.protocol.v1_19to1_18_2.rewriter.CommandRewriter1_19;
 import com.viaversion.viabackwards.protocol.v1_19to1_18_2.rewriter.EntityPacketRewriter1_19;
 import com.viaversion.viabackwards.protocol.v1_19to1_18_2.storage.DimensionRegistryStorage;
+import com.viaversion.viabackwards.protocol.v1_19to1_18_2.storage.EntityTracker1_19;
 import com.viaversion.viabackwards.protocol.v1_19to1_18_2.storage.NonceStorage;
-import com.viaversion.viabackwards.protocol.v1_19_1to1_19.Protocol1_19_1To1_19;
 import com.viaversion.viaversion.api.Via;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.minecraft.RegistryType;
-import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_19;
 import com.viaversion.viaversion.api.minecraft.signature.SignableCommandArgumentsProvider;
 import com.viaversion.viaversion.api.minecraft.signature.model.DecoratableMessage;
 import com.viaversion.viaversion.api.minecraft.signature.model.MessageMetadata;
@@ -40,9 +40,7 @@ import com.viaversion.viaversion.api.minecraft.signature.storage.ChatSession1_19
 import com.viaversion.viaversion.api.protocol.packet.State;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
 import com.viaversion.viaversion.api.type.Types;
-import com.viaversion.viaversion.data.entity.EntityTrackerBase;
 import com.viaversion.viaversion.libs.gson.JsonElement;
-import com.viaversion.nbt.tag.CompoundTag;
 import com.viaversion.viaversion.protocols.base.ClientboundLoginPackets;
 import com.viaversion.viaversion.protocols.base.ServerboundLoginPackets;
 import com.viaversion.viaversion.protocols.v1_16_4to1_17.packet.ServerboundPackets1_17;
@@ -53,6 +51,7 @@ import com.viaversion.viaversion.protocols.v1_19to1_19_1.Protocol1_19To1_19_1;
 import com.viaversion.viaversion.protocols.v1_19to1_19_1.data.ChatDecorationResult;
 import com.viaversion.viaversion.rewriter.CommandRewriter;
 import com.viaversion.viaversion.rewriter.ComponentRewriter;
+import com.viaversion.viaversion.rewriter.ParticleRewriter;
 import com.viaversion.viaversion.rewriter.StatisticsRewriter;
 import com.viaversion.viaversion.rewriter.TagRewriter;
 import com.viaversion.viaversion.util.Pair;
@@ -69,6 +68,7 @@ public final class Protocol1_19To1_18_2 extends BackwardsProtocol<ClientboundPac
     private static final byte[] EMPTY_BYTES = new byte[0];
     private final EntityPacketRewriter1_19 entityRewriter = new EntityPacketRewriter1_19(this);
     private final BlockItemPacketRewriter1_19 blockItemPackets = new BlockItemPacketRewriter1_19(this);
+    private final ParticleRewriter<ClientboundPackets1_19> particleRewriter = new ParticleRewriter<>(this);
     private final TranslatableRewriter<ClientboundPackets1_19> translatableRewriter = new TranslatableRewriter<>(this, ComponentRewriter.ReadType.JSON);
     private final TagRewriter<ClientboundPackets1_19> tagRewriter = new TagRewriter<>(this);
 
@@ -291,7 +291,7 @@ public final class Protocol1_19To1_18_2 extends BackwardsProtocol<ClientboundPac
         });
 
         // Login changes
-        registerClientbound(State.LOGIN, ClientboundLoginPackets.GAME_PROFILE.getId(), ClientboundLoginPackets.GAME_PROFILE.getId(), new PacketHandlers() {
+        registerClientbound(State.LOGIN, ClientboundLoginPackets.LOGIN_FINISHED, new PacketHandlers() {
             @Override
             public void register() {
                 map(Types.UUID); // UUID
@@ -307,7 +307,7 @@ public final class Protocol1_19To1_18_2 extends BackwardsProtocol<ClientboundPac
             }
         });
 
-        registerClientbound(State.LOGIN, ClientboundLoginPackets.HELLO.getId(), ClientboundLoginPackets.HELLO.getId(), new PacketHandlers() {
+        registerClientbound(State.LOGIN, ClientboundLoginPackets.HELLO, new PacketHandlers() {
             @Override
             public void register() {
                 map(Types.STRING); // Server id
@@ -319,7 +319,7 @@ public final class Protocol1_19To1_18_2 extends BackwardsProtocol<ClientboundPac
                 });
             }
         });
-        registerServerbound(State.LOGIN, ServerboundLoginPackets.HELLO.getId(), ServerboundLoginPackets.HELLO.getId(), new PacketHandlers() {
+        registerServerbound(State.LOGIN, ServerboundLoginPackets.HELLO, new PacketHandlers() {
             @Override
             public void register() {
                 map(Types.STRING); // Name
@@ -330,7 +330,7 @@ public final class Protocol1_19To1_18_2 extends BackwardsProtocol<ClientboundPac
             }
         });
 
-        registerServerbound(State.LOGIN, ServerboundLoginPackets.ENCRYPTION_KEY.getId(), ServerboundLoginPackets.ENCRYPTION_KEY.getId(), new PacketHandlers() {
+        registerServerbound(State.LOGIN, ServerboundLoginPackets.ENCRYPTION_KEY, new PacketHandlers() {
             @Override
             public void register() {
                 map(Types.BYTE_ARRAY_PRIMITIVE); // Public key
@@ -363,7 +363,7 @@ public final class Protocol1_19To1_18_2 extends BackwardsProtocol<ClientboundPac
     @Override
     public void init(final UserConnection user) {
         user.put(new DimensionRegistryStorage());
-        addEntityTracker(user, new EntityTrackerBase(user, EntityTypes1_19.PLAYER));
+        addEntityTracker(user, new EntityTracker1_19(user));
     }
 
     @Override
@@ -386,6 +386,11 @@ public final class Protocol1_19To1_18_2 extends BackwardsProtocol<ClientboundPac
         return blockItemPackets;
     }
 
+    @Override
+    public ParticleRewriter<ClientboundPackets1_19> getParticleRewriter() {
+        return particleRewriter;
+    }
+
     @Override
     public TagRewriter<ClientboundPackets1_19> getTagRewriter() {
         return tagRewriter;

common/src/main/java/com/viaversion/viabackwards/protocol/v1_19to1_18_2/data/BackwardsMappingData1_19.java

@@ -17,6 +17,7 @@
  */
 package com.viaversion.viabackwards.protocol.v1_19to1_18_2.data;
 
+import com.viaversion.viabackwards.ViaBackwards;
 import com.viaversion.viabackwards.api.data.BackwardsMappingData;
 import com.viaversion.viabackwards.api.data.BackwardsMappingDataLoader;
 import com.viaversion.viaversion.libs.fastutil.ints.Int2ObjectMap;
@@ -29,6 +30,8 @@ import org.checkerframework.checker.nullness.qual.Nullable;
 
 public final class BackwardsMappingData1_19 extends BackwardsMappingData {
 
+    private final boolean sculkShriekerToCryingObsidian = ViaBackwards.getConfig().sculkShriekerToCryingObsidian();
+
     private final Int2ObjectMap<CompoundTag> defaultChatTypes = new Int2ObjectOpenHashMap<>();
 
     public BackwardsMappingData1_19() {
@@ -39,6 +42,13 @@ public final class BackwardsMappingData1_19 extends BackwardsMappingData {
     protected void loadExtras(final CompoundTag data) {
         super.loadExtras(data);
 
+        if (sculkShriekerToCryingObsidian) {
+            blockMappings.setNewId(850, 750);
+            for (int i = 18900; i <= 18907; i++) {
+                blockStateMappings.setNewId(i, 16082);
+            }
+        }
+
         final ListTag<CompoundTag> chatTypes = BackwardsMappingDataLoader.INSTANCE.loadNBT("chat-types-1.19.1.nbt").getListTag("values", CompoundTag.class);
         for (final CompoundTag chatType : chatTypes) {
             final NumberTag idTag = chatType.getNumberTag("id");
@@ -46,6 +56,14 @@ public final class BackwardsMappingData1_19 extends BackwardsMappingData {
         }
     }
 
+    @Override
+    public int getNewItemId(final int id) {
+        if (sculkShriekerToCryingObsidian && id == 329) {
+            return 1065;
+        }
+        return super.getNewItemId(id);
+    }
+
     public @Nullable CompoundTag chatType(final int id) {
         return defaultChatTypes.get(id);
     }

common/src/main/java/com/viaversion/viabackwards/protocol/v1_19to1_18_2/rewriter/BlockItemPacketRewriter1_19.java

@@ -19,6 +19,7 @@ package com.viaversion.viabackwards.protocol.v1_19to1_18_2.rewriter;
 
 import com.viaversion.nbt.tag.CompoundTag;
 import com.viaversion.viabackwards.api.rewriters.BackwardsItemRewriter;
+import com.viaversion.viabackwards.api.rewriters.EnchantmentRewriter;
 import com.viaversion.viabackwards.protocol.v1_19to1_18_2.Protocol1_19To1_18_2;
 import com.viaversion.viabackwards.protocol.v1_19to1_18_2.storage.LastDeathPosition;
 import com.viaversion.viaversion.api.connection.UserConnection;
@@ -42,6 +43,8 @@ import com.viaversion.viaversion.util.MathUtil;
 
 public final class BlockItemPacketRewriter1_19 extends BackwardsItemRewriter<ClientboundPackets1_19, ServerboundPackets1_17, Protocol1_19To1_18_2> {
 
+    private final EnchantmentRewriter enchantmentRewriter = new EnchantmentRewriter(this);
+
     public BlockItemPacketRewriter1_19(final Protocol1_19To1_18_2 protocol) {
         super(protocol, Types.ITEM1_13_2, Types.ITEM1_13_2_ARRAY);
     }
@@ -138,7 +141,7 @@ public final class BlockItemPacketRewriter1_19 extends BackwardsItemRewriter<Cli
                         wrapper.cancel();
                     }
                 });
-                handler(levelParticlesHandler());
+                handler(protocol.getParticleRewriter().levelParticlesHandler1_13(Types.INT));
             }
         });
 
@@ -208,6 +211,11 @@ public final class BlockItemPacketRewriter1_19 extends BackwardsItemRewriter<Cli
         });
     }
 
+    @Override
+    protected void registerRewrites() {
+        enchantmentRewriter.registerEnchantment("minecraft:swift_sneak", "§7Swift Sneak");
+    }
+
     @Override
     public Item handleItemToClient(final UserConnection connection, final Item item) {
         if (item == null) return null;
@@ -232,6 +240,8 @@ public final class BlockItemPacketRewriter1_19 extends BackwardsItemRewriter<Cli
         lodestonePosTag.putInt("X", position.x());
         lodestonePosTag.putInt("Y", position.y());
         lodestonePosTag.putInt("Z", position.z());
+
+        enchantmentRewriter.handleToClient(item);
         return item;
     }
 
@@ -252,6 +262,8 @@ public final class BlockItemPacketRewriter1_19 extends BackwardsItemRewriter<Cli
                 item.setTag(null);
             }
         }
+
+        enchantmentRewriter.handleToServer(item);
         return item;
     }
 }

common/src/main/java/com/viaversion/viabackwards/protocol/v1_19to1_18_2/rewriter/EntityPacketRewriter1_19.java

@@ -17,16 +17,21 @@
  */
 package com.viaversion.viabackwards.protocol.v1_19to1_18_2.rewriter;
 
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.nbt.tag.ListTag;
+import com.viaversion.nbt.tag.NumberTag;
+import com.viaversion.viabackwards.ViaBackwards;
 import com.viaversion.viabackwards.api.rewriters.EntityRewriter;
 import com.viaversion.viabackwards.protocol.v1_19to1_18_2.Protocol1_19To1_18_2;
 import com.viaversion.viabackwards.protocol.v1_19to1_18_2.storage.DimensionRegistryStorage;
+import com.viaversion.viabackwards.protocol.v1_19to1_18_2.storage.EntityTracker1_19;
 import com.viaversion.viabackwards.protocol.v1_19to1_18_2.storage.LastDeathPosition;
 import com.viaversion.viabackwards.protocol.v1_19to1_18_2.storage.StoredPainting;
 import com.viaversion.viaversion.api.data.ParticleMappings;
 import com.viaversion.viaversion.api.data.entity.StoredEntityData;
+import com.viaversion.viaversion.api.minecraft.BlockPosition;
 import com.viaversion.viaversion.api.minecraft.GlobalBlockPosition;
 import com.viaversion.viaversion.api.minecraft.Particle;
-import com.viaversion.viaversion.api.minecraft.BlockPosition;
 import com.viaversion.viaversion.api.minecraft.entities.EntityType;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_19;
 import com.viaversion.viaversion.api.minecraft.entitydata.EntityDataType;
@@ -37,9 +42,6 @@ import com.viaversion.viaversion.api.type.types.version.Types1_18;
 import com.viaversion.viaversion.api.type.types.version.Types1_19;
 import com.viaversion.viaversion.protocols.v1_17_1to1_18.packet.ClientboundPackets1_18;
 import com.viaversion.viaversion.protocols.v1_18_2to1_19.packet.ClientboundPackets1_19;
-import com.viaversion.nbt.tag.CompoundTag;
-import com.viaversion.nbt.tag.ListTag;
-import com.viaversion.nbt.tag.NumberTag;
 import com.viaversion.viaversion.util.Key;
 import com.viaversion.viaversion.util.TagUtil;
 
@@ -84,7 +86,7 @@ public final class EntityPacketRewriter1_19 extends EntityRewriter<ClientboundPa
                         return;
                     } else if (entityType == EntityTypes1_19.PAINTING) {
                         wrapper.cancel();
-                        // The entity has been tracked, now we wait for the metadata packet
+                        // The entity has been tracked, now we wait for the entity data packet
                         final int entityId = wrapper.get(Types.VAR_INT, 0);
                         final StoredEntityData entityData = tracker(wrapper.user()).entityData(entityId);
                         final BlockPosition position = new BlockPosition(wrapper.get(Types.DOUBLE, 0).intValue(), wrapper.get(Types.DOUBLE, 1).intValue(), wrapper.get(Types.DOUBLE, 2).intValue());
@@ -111,6 +113,50 @@ public final class EntityPacketRewriter1_19 extends EntityRewriter<ClientboundPa
                 handler(wrapper -> {
                     // Remove factor data
                     wrapper.read(Types.OPTIONAL_NAMED_COMPOUND_TAG);
+
+                    if (!ViaBackwards.getConfig().mapDarknessEffect()) {
+                        return;
+                    }
+
+                    final EntityTracker1_19 tracker = tracker(wrapper.user());
+
+                    final int entityId = wrapper.get(Types.VAR_INT, 0);
+                    final int effectId = wrapper.get(Types.VAR_INT, 1);
+                    if (effectId == 33) { // Newly added darkness, rewrite to blindness
+                        tracker.getAffectedByDarkness().add(entityId);
+                        wrapper.set(Types.VAR_INT, 1, 15);
+                    } else if (effectId == 15) { // Track actual blindness effect for removal later
+                        tracker.getAffectedByBlindness().add(entityId);
+                    }
+                });
+            }
+        });
+
+        protocol.registerClientbound(ClientboundPackets1_19.REMOVE_MOB_EFFECT, new PacketHandlers() {
+            @Override
+            protected void register() {
+                map(Types.VAR_INT); // Entity id
+                map(Types.VAR_INT); // Effect id
+                handler(wrapper -> {
+                    if (!ViaBackwards.getConfig().mapDarknessEffect()) {
+                        return;
+                    }
+
+                    final int entityId = wrapper.get(Types.VAR_INT, 0);
+                    final int effectId = wrapper.get(Types.VAR_INT, 1);
+
+                    final EntityTracker1_19 tracker = tracker(wrapper.user());
+                    if (effectId == 33) { // Remove darkness and the fake blindness effect if the client doesn't have actual blindness
+                        tracker.getAffectedByDarkness().rem(entityId);
+                        if (!tracker.getAffectedByBlindness().contains(entityId)) {
+                            wrapper.set(Types.VAR_INT, 1, 15);
+                        }
+                    } else if (effectId == 15) { // Remove blindness and cancel if the client has darkness (will be removed by darkness removal)
+                        tracker.getAffectedByBlindness().rem(entityId);
+                        if (tracker.getAffectedByDarkness().contains(entityId)) {
+                            wrapper.cancel();
+                        }
+                    }
                 });
             }
         });
@@ -202,7 +248,7 @@ public final class EntityPacketRewriter1_19 extends EntityRewriter<ClientboundPa
                 map(Types.BYTE); // Previous gamemode
                 map(Types.BOOLEAN); // Debug
                 map(Types.BOOLEAN); // Flat
-                map(Types.BOOLEAN); // Keep player data
+                map(Types.BOOLEAN); // Keep player attributes
                 handler(wrapper -> {
                     final GlobalBlockPosition lastDeathPosition = wrapper.read(Types.OPTIONAL_GLOBAL_POSITION);
                     if (lastDeathPosition != null) {
@@ -247,14 +293,14 @@ public final class EntityPacketRewriter1_19 extends EntityRewriter<ClientboundPa
 
     @Override
     protected void registerRewrites() {
-        filter().handler((event, meta) -> {
-            if (meta.dataType().typeId() <= Types1_18.ENTITY_DATA_TYPES.poseType.typeId()) {
-                meta.setDataType(Types1_18.ENTITY_DATA_TYPES.byId(meta.dataType().typeId()));
+        filter().handler((event, data) -> {
+            if (data.dataType().typeId() <= Types1_18.ENTITY_DATA_TYPES.poseType.typeId()) {
+                data.setDataType(Types1_18.ENTITY_DATA_TYPES.byId(data.dataType().typeId()));
             }
 
-            final EntityDataType type = meta.dataType();
+            final EntityDataType type = data.dataType();
             if (type == Types1_18.ENTITY_DATA_TYPES.particleType) {
-                final Particle particle = (Particle) meta.getValue();
+                final Particle particle = (Particle) data.getValue();
                 final ParticleMappings particleMappings = protocol.getMappingData().getParticleMappings();
                 if (particle.id() == particleMappings.id("sculk_charge")) {
                     //TODO
@@ -270,21 +316,21 @@ public final class EntityPacketRewriter1_19 extends EntityRewriter<ClientboundPa
                     return;
                 }
 
-                rewriteParticle(event.user(), particle);
+                protocol.getParticleRewriter().rewriteParticle(event.user(), particle);
             } else if (type == Types1_18.ENTITY_DATA_TYPES.poseType) {
-                final int pose = meta.value();
+                final int pose = data.value();
                 if (pose >= 8) {
                     // Croaking, using_tongue, roaring, sniffing, emerging, digging -> standing -> standing
-                    meta.setValue(0);
+                    data.setValue(0);
                 }
             }
         });
 
-        registerMetaTypeHandler(Types1_18.ENTITY_DATA_TYPES.itemType, null, Types1_18.ENTITY_DATA_TYPES.optionalBlockStateType, null,
+        registerEntityDataTypeHandler(Types1_18.ENTITY_DATA_TYPES.itemType, null, Types1_18.ENTITY_DATA_TYPES.optionalBlockStateType, null,
             Types1_18.ENTITY_DATA_TYPES.componentType, Types1_18.ENTITY_DATA_TYPES.optionalComponentType);
         registerBlockStateHandler(EntityTypes1_19.ABSTRACT_MINECART, 11);
 
-        filter().type(EntityTypes1_19.PAINTING).index(8).handler((event, meta) -> {
+        filter().type(EntityTypes1_19.PAINTING).index(8).handler((event, data) -> {
             event.cancel();
 
             final StoredEntityData entityData = tracker(event.user()).entityDataIfPresent(event.entityId());
@@ -293,7 +339,7 @@ public final class EntityPacketRewriter1_19 extends EntityRewriter<ClientboundPa
                 final PacketWrapper packet = PacketWrapper.create(ClientboundPackets1_18.ADD_PAINTING, event.user());
                 packet.write(Types.VAR_INT, storedPainting.entityId());
                 packet.write(Types.UUID, storedPainting.uuid());
-                packet.write(Types.VAR_INT, meta.value());
+                packet.write(Types.VAR_INT, data.value());
                 packet.write(Types.BLOCK_POSITION1_14, storedPainting.position());
                 packet.write(Types.BYTE, storedPainting.direction());
                 try {
@@ -305,7 +351,7 @@ public final class EntityPacketRewriter1_19 extends EntityRewriter<ClientboundPa
             }
         });
 
-        filter().type(EntityTypes1_19.CAT).index(19).handler((event, meta) -> meta.setDataType(Types1_18.ENTITY_DATA_TYPES.varIntType));
+        filter().type(EntityTypes1_19.CAT).index(19).handler((event, data) -> data.setDataType(Types1_18.ENTITY_DATA_TYPES.varIntType));
 
         filter().type(EntityTypes1_19.FROG).cancel(16); // Age
         filter().type(EntityTypes1_19.FROG).cancel(17); // Variant

common/src/main/java/com/viaversion/viabackwards/protocol/v1_19to1_18_2/storage/EntityTracker1_19.java

@@ -0,0 +1,49 @@
+/*
+ * This file is part of ViaBackwards - https://github.com/ViaVersion/ViaBackwards
+ * 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.viabackwards.protocol.v1_19to1_18_2.storage;
+
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_19;
+import com.viaversion.viaversion.data.entity.EntityTrackerBase;
+import com.viaversion.viaversion.libs.fastutil.ints.IntArrayList;
+import com.viaversion.viaversion.libs.fastutil.ints.IntList;
+
+public final class EntityTracker1_19 extends EntityTrackerBase {
+
+    private final IntList affectedByBlindness = new IntArrayList();
+    private final IntList affectedByDarkness = new IntArrayList();
+
+    public EntityTracker1_19(final UserConnection connection) {
+        super(connection, EntityTypes1_19.PLAYER);
+    }
+
+    @Override
+    public void removeEntity(final int id) {
+        super.removeEntity(id);
+        this.affectedByBlindness.rem(id);
+        this.affectedByDarkness.rem(id);
+    }
+
+    public IntList getAffectedByBlindness() {
+        return affectedByBlindness;
+    }
+
+    public IntList getAffectedByDarkness() {
+        return affectedByDarkness;
+    }
+}

common/src/main/java/com/viaversion/viabackwards/protocol/v1_20_2to1_20/Protocol1_20_2To1_20.java

@@ -17,6 +17,7 @@
  */
 package com.viaversion.viabackwards.protocol.v1_20_2to1_20;
 
+import com.viaversion.nbt.tag.CompoundTag;
 import com.viaversion.viabackwards.api.BackwardsProtocol;
 import com.viaversion.viabackwards.api.data.BackwardsMappingData;
 import com.viaversion.viabackwards.api.rewriters.SoundRewriter;
@@ -36,7 +37,6 @@ import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.data.entity.EntityTrackerBase;
 import com.viaversion.viaversion.exception.CancelException;
 import com.viaversion.viaversion.exception.InformativeException;
-import com.viaversion.nbt.tag.CompoundTag;
 import com.viaversion.viaversion.protocols.base.ClientboundLoginPackets;
 import com.viaversion.viaversion.protocols.base.ServerboundLoginPackets;
 import com.viaversion.viaversion.protocols.v1_19_3to1_19_4.packet.ClientboundPackets1_19_4;
@@ -46,6 +46,7 @@ import com.viaversion.viaversion.protocols.v1_20to1_20_2.packet.ClientboundConfi
 import com.viaversion.viaversion.protocols.v1_20to1_20_2.packet.ClientboundPackets1_20_2;
 import com.viaversion.viaversion.protocols.v1_20to1_20_2.packet.ServerboundConfigurationPackets1_20_2;
 import com.viaversion.viaversion.protocols.v1_20to1_20_2.packet.ServerboundPackets1_20_2;
+import com.viaversion.viaversion.rewriter.ParticleRewriter;
 import com.viaversion.viaversion.rewriter.TagRewriter;
 import java.util.UUID;
 
@@ -54,6 +55,7 @@ public final class Protocol1_20_2To1_20 extends BackwardsProtocol<ClientboundPac
     public static final BackwardsMappingData MAPPINGS = new BackwardsMappingData("1.20.2", "1.20", Protocol1_20To1_20_2.class);
     private final EntityPacketRewriter1_20_2 entityPacketRewriter = new EntityPacketRewriter1_20_2(this);
     private final BlockItemPacketRewriter1_20_2 itemPacketRewriter = new BlockItemPacketRewriter1_20_2(this);
+    private final ParticleRewriter<ClientboundPackets1_20_2> particleRewriter = new ParticleRewriter<>(this);
     private final TagRewriter<ClientboundPackets1_20_2> tagRewriter = new TagRewriter<>(this);
 
     public Protocol1_20_2To1_20() {
@@ -71,12 +73,14 @@ public final class Protocol1_20_2To1_20 extends BackwardsProtocol<ClientboundPac
         soundRewriter.registerSound1_19_3(ClientboundPackets1_20_2.SOUND_ENTITY);
         soundRewriter.registerStopSound(ClientboundPackets1_20_2.STOP_SOUND);
 
+        particleRewriter.registerLevelParticles1_19(ClientboundPackets1_20_2.LEVEL_PARTICLES);
+
         registerClientbound(ClientboundPackets1_20_2.SET_DISPLAY_OBJECTIVE, wrapper -> {
             final int slot = wrapper.read(Types.VAR_INT);
             wrapper.write(Types.BYTE, (byte) slot);
         });
 
-        registerClientbound(State.LOGIN, ClientboundLoginPackets.GAME_PROFILE.getId(), ClientboundLoginPackets.GAME_PROFILE.getId(), wrapper -> {
+        registerClientbound(State.LOGIN, ClientboundLoginPackets.LOGIN_FINISHED, wrapper -> {
             // We can't set the internal state to configuration here as protocols down the line will expect the state to be play
             // Add this *before* sending the ack since the server might immediately answer
             wrapper.user().put(new ConfigurationPacketStorage());
@@ -88,7 +92,7 @@ public final class Protocol1_20_2To1_20 extends BackwardsProtocol<ClientboundPac
             wrapper.create(ServerboundLoginPackets.LOGIN_ACKNOWLEDGED).scheduleSendToServer(Protocol1_20_2To1_20.class);
         });
 
-        registerClientbound(State.CONFIGURATION, ClientboundConfigurationPackets1_20_2.FINISH_CONFIGURATION.getId(), ClientboundConfigurationPackets1_20_2.FINISH_CONFIGURATION.getId(), wrapper -> {
+        registerClientbound(State.CONFIGURATION, ClientboundConfigurationPackets1_20_2.FINISH_CONFIGURATION, wrapper -> {
             wrapper.cancel();
             wrapper.user().getProtocolInfo().setServerState(State.PLAY);
             wrapper.user().get(ConfigurationPacketStorage.class).setFinished(true);
@@ -97,7 +101,7 @@ public final class Protocol1_20_2To1_20 extends BackwardsProtocol<ClientboundPac
             wrapper.user().getProtocolInfo().setClientState(State.PLAY);
         });
 
-        registerServerbound(State.LOGIN, ServerboundLoginPackets.HELLO.getId(), ServerboundLoginPackets.HELLO.getId(), wrapper -> {
+        registerServerbound(State.LOGIN, ServerboundLoginPackets.HELLO, wrapper -> {
             wrapper.passthrough(Types.STRING); // Name
 
             // TODO Bad
@@ -155,7 +159,7 @@ public final class Protocol1_20_2To1_20 extends BackwardsProtocol<ClientboundPac
             wrapper.cancel();
         });
         registerClientbound(State.CONFIGURATION, ClientboundConfigurationPackets1_20_2.UPDATE_TAGS.getId(), -1, wrapper -> {
-            tagRewriter.getGenericHandler().handle(wrapper);
+            tagRewriter.handleGeneric(wrapper);
             wrapper.user().get(ConfigurationPacketStorage.class).addRawPacket(wrapper, ClientboundPackets1_19_4.UPDATE_TAGS);
             wrapper.cancel();
         });
@@ -225,8 +229,13 @@ public final class Protocol1_20_2To1_20 extends BackwardsProtocol<ClientboundPac
         return itemPacketRewriter;
     }
 
+    @Override
+    public ParticleRewriter<ClientboundPackets1_20_2> getParticleRewriter() {
+        return particleRewriter;
+    }
+
     @Override
     public TagRewriter<ClientboundPackets1_20_2> getTagRewriter() {
         return tagRewriter;
     }
-}
+}

common/src/main/java/com/viaversion/viabackwards/protocol/v1_20_2to1_20/provider/AdvancementCriteriaProvider.java

@@ -21,7 +21,7 @@ import com.viaversion.viaversion.api.platform.providers.Provider;
 
 public class AdvancementCriteriaProvider implements Provider {
 
-    public String[] getCriteria(final String advacementKey) {
+    public String[] getCriteria(final String advancementKey) {
         return new String[0];
     }
 }

common/src/main/java/com/viaversion/viabackwards/protocol/v1_20_2to1_20/rewriter/BlockItemPacketRewriter1_20_2.java

@@ -26,7 +26,6 @@ import com.viaversion.viabackwards.protocol.v1_20_2to1_20.Protocol1_20_2To1_20;
 import com.viaversion.viabackwards.protocol.v1_20_2to1_20.provider.AdvancementCriteriaProvider;
 import com.viaversion.viaversion.api.Via;
 import com.viaversion.viaversion.api.connection.UserConnection;
-import com.viaversion.viaversion.api.data.ParticleMappings;
 import com.viaversion.viaversion.api.data.entity.EntityTracker;
 import com.viaversion.viaversion.api.minecraft.ChunkPosition;
 import com.viaversion.viaversion.api.minecraft.blockentity.BlockEntity;
@@ -54,7 +53,7 @@ import org.checkerframework.checker.nullness.qual.Nullable;
 public final class BlockItemPacketRewriter1_20_2 extends BackwardsItemRewriter<ClientboundPackets1_20_2, ServerboundPackets1_19_4, Protocol1_20_2To1_20> {
 
     public BlockItemPacketRewriter1_20_2(final Protocol1_20_2To1_20 protocol) {
-        super(protocol, Types.ITEM1_20_2, Types.ITEM1_20_2_ARRAY);
+        super(protocol, Types.ITEM1_20_2, Types.ITEM1_20_2_ARRAY, Types.ITEM1_13_2, Types.ITEM1_13_2_ARRAY);
     }
 
     @Override
@@ -65,6 +64,12 @@ public final class BlockItemPacketRewriter1_20_2 extends BackwardsItemRewriter<C
         blockRewriter.registerSectionBlocksUpdate1_20(ClientboundPackets1_20_2.SECTION_BLOCKS_UPDATE);
         blockRewriter.registerLevelEvent(ClientboundPackets1_20_2.LEVEL_EVENT, 1010, 2001);
 
+        registerSetContent1_17_1(ClientboundPackets1_20_2.CONTAINER_SET_CONTENT);
+        registerSetSlot1_17_1(ClientboundPackets1_20_2.CONTAINER_SET_SLOT);
+        registerContainerClick1_17_1(ServerboundPackets1_19_4.CONTAINER_CLICK);
+        registerMerchantOffers1_19(ClientboundPackets1_20_2.MERCHANT_OFFERS);
+        registerSetCreativeModeSlot(ServerboundPackets1_19_4.SET_CREATIVE_MODE_SLOT);
+
         protocol.cancelClientbound(ClientboundPackets1_20_2.CHUNK_BATCH_START);
         protocol.registerClientbound(ClientboundPackets1_20_2.CHUNK_BATCH_FINISHED, null, wrapper -> {
             wrapper.cancel();
@@ -145,32 +150,6 @@ public final class BlockItemPacketRewriter1_20_2 extends BackwardsItemRewriter<C
             }
         });
 
-        // Replace the NBT type everywhere
-        protocol.registerClientbound(ClientboundPackets1_20_2.CONTAINER_SET_CONTENT, new PacketHandlers() {
-            @Override
-            public void register() {
-                map(Types.UNSIGNED_BYTE); // Window id
-                map(Types.VAR_INT); // State id
-                handler(wrapper -> {
-                    final Item[] items = wrapper.read(Types.ITEM1_20_2_ARRAY);
-                    for (final Item item : items) {
-                        handleItemToClient(wrapper.user(), item);
-                    }
-
-                    wrapper.write(Types.ITEM1_13_2_ARRAY, items);
-                    wrapper.write(Types.ITEM1_13_2, handleItemToClient(wrapper.user(), wrapper.read(Types.ITEM1_20_2))); // Carried item
-                });
-            }
-        });
-        protocol.registerClientbound(ClientboundPackets1_20_2.CONTAINER_SET_SLOT, new PacketHandlers() {
-            @Override
-            public void register() {
-                map(Types.UNSIGNED_BYTE); // Window id
-                map(Types.VAR_INT); // State id
-                map(Types.SHORT); // Slot id
-                handler(wrapper -> wrapper.write(Types.ITEM1_13_2, handleItemToClient(wrapper.user(), wrapper.read(Types.ITEM1_20_2))));
-            }
-        });
         protocol.registerClientbound(ClientboundPackets1_20_2.UPDATE_ADVANCEMENTS, wrapper -> {
             wrapper.passthrough(Types.BOOLEAN); // Reset/clear
             final int size = wrapper.passthrough(Types.VAR_INT);
@@ -216,159 +195,18 @@ public final class BlockItemPacketRewriter1_20_2 extends BackwardsItemRewriter<C
                 });
             }
         });
-        protocol.registerServerbound(ServerboundPackets1_19_4.CONTAINER_CLICK, new PacketHandlers() {
-            @Override
-            public void register() {
-                map(Types.UNSIGNED_BYTE); // Window Id
-                map(Types.VAR_INT); // State id
-                map(Types.SHORT); // Slot
-                map(Types.BYTE); // Button
-                map(Types.VAR_INT); // Mode
-
-                handler(wrapper -> {
-                    // Affected items
-                    final int length = wrapper.passthrough(Types.VAR_INT);
-                    for (int i = 0; i < length; i++) {
-                        wrapper.passthrough(Types.SHORT); // Slot
-                        wrapper.write(Types.ITEM1_20_2, handleItemToServer(wrapper.user(), wrapper.read(Types.ITEM1_13_2)));
-                    }
-
-                    // Carried item
-                    wrapper.write(Types.ITEM1_20_2, handleItemToServer(wrapper.user(), wrapper.read(Types.ITEM1_13_2)));
-                });
-            }
-        });
-        protocol.registerClientbound(ClientboundPackets1_20_2.MERCHANT_OFFERS, wrapper -> {
-            wrapper.passthrough(Types.VAR_INT); // Container id
-            final int size = wrapper.passthrough(Types.VAR_INT);
-            for (int i = 0; i < size; i++) {
-                wrapper.write(Types.ITEM1_13_2, handleItemToClient(wrapper.user(), wrapper.read(Types.ITEM1_20_2))); // Input
-                wrapper.write(Types.ITEM1_13_2, handleItemToClient(wrapper.user(), wrapper.read(Types.ITEM1_20_2))); // Output
-                wrapper.write(Types.ITEM1_13_2, handleItemToClient(wrapper.user(), wrapper.read(Types.ITEM1_20_2))); // Second Item
-
-                wrapper.passthrough(Types.BOOLEAN); // Trade disabled
-                wrapper.passthrough(Types.INT); // Number of tools uses
-                wrapper.passthrough(Types.INT); // Maximum number of trade uses
-                wrapper.passthrough(Types.INT); // XP
-                wrapper.passthrough(Types.INT); // Special price
-                wrapper.passthrough(Types.FLOAT); // Price multiplier
-                wrapper.passthrough(Types.INT); // Demand
-            }
-        });
-        protocol.registerServerbound(ServerboundPackets1_19_4.SET_CREATIVE_MODE_SLOT, new PacketHandlers() {
-            @Override
-            public void register() {
-                map(Types.SHORT); // 0 - Slot
-                handler(wrapper -> wrapper.write(Types.ITEM1_20_2, handleItemToServer(wrapper.user(), wrapper.read(Types.ITEM1_13_2)))); // 1 - Clicked Item
-            }
-        });
-        protocol.registerClientbound(ClientboundPackets1_20_2.LEVEL_PARTICLES, new PacketHandlers() {
-            @Override
-            public void register() {
-                map(Types.VAR_INT); // 0 - Particle ID
-                map(Types.BOOLEAN); // 1 - Long Distance
-                map(Types.DOUBLE); // 2 - X
-                map(Types.DOUBLE); // 3 - Y
-                map(Types.DOUBLE); // 4 - Z
-                map(Types.FLOAT); // 5 - Offset X
-                map(Types.FLOAT); // 6 - Offset Y
-                map(Types.FLOAT); // 7 - Offset Z
-                map(Types.FLOAT); // 8 - Particle Data
-                map(Types.INT); // 9 - Particle Count
-                handler(wrapper -> {
-                    final int id = wrapper.get(Types.VAR_INT, 0);
-                    final ParticleMappings mappings = Protocol1_20_2To1_20.MAPPINGS.getParticleMappings();
-                    if (mappings.isBlockParticle(id)) {
-                        final int data = wrapper.read(Types.VAR_INT);
-                        wrapper.write(Types.VAR_INT, protocol.getMappingData().getNewBlockStateId(data));
-                    } else if (mappings.isItemParticle(id)) {
-                        wrapper.write(Types.ITEM1_13_2, handleItemToClient(wrapper.user(), wrapper.read(Types.ITEM1_20_2)));
-                    }
-                });
-            }
-        });
 
         new RecipeRewriter1_20_2<>(protocol) {
             @Override
-            public void handleCraftingShapeless(final PacketWrapper wrapper) {
-                wrapper.passthrough(Types.STRING); // Group
-                wrapper.passthrough(Types.VAR_INT); // Crafting book category
-                handleIngredients(wrapper);
-
-                final Item result = wrapper.read(itemType());
-                rewrite(wrapper.user(), result);
-                wrapper.write(Types.ITEM1_13_2, result);
+            protected Type<Item> mappedItemType() {
+                return BlockItemPacketRewriter1_20_2.this.mappedItemType();
             }
 
             @Override
-            public void handleSmelting(final PacketWrapper wrapper) {
-                wrapper.passthrough(Types.STRING); // Group
-                wrapper.passthrough(Types.VAR_INT); // Crafting book category
-                handleIngredient(wrapper);
-
-                final Item result = wrapper.read(itemType());
-                rewrite(wrapper.user(), result);
-                wrapper.write(Types.ITEM1_13_2, result);
-
-                wrapper.passthrough(Types.FLOAT); // EXP
-                wrapper.passthrough(Types.VAR_INT); // Cooking time
+            protected Type<Item[]> mappedItemArrayType() {
+                return BlockItemPacketRewriter1_20_2.this.mappedItemArrayType();
             }
 
-            @Override
-            public void handleCraftingShaped(final PacketWrapper wrapper) {
-                final int ingredients = wrapper.passthrough(Types.VAR_INT) * wrapper.passthrough(Types.VAR_INT);
-                wrapper.passthrough(Types.STRING); // Group
-                wrapper.passthrough(Types.VAR_INT); // Crafting book category
-                for (int i = 0; i < ingredients; i++) {
-                    handleIngredient(wrapper);
-                }
-
-                final Item result = wrapper.read(itemType());
-                rewrite(wrapper.user(), result);
-                wrapper.write(Types.ITEM1_13_2, result);
-
-                wrapper.passthrough(Types.BOOLEAN); // Show notification
-            }
-
-            @Override
-            public void handleStonecutting(final PacketWrapper wrapper) {
-                wrapper.passthrough(Types.STRING); // Group
-                handleIngredient(wrapper);
-
-                final Item result = wrapper.read(itemType());
-                rewrite(wrapper.user(), result);
-                wrapper.write(Types.ITEM1_13_2, result);
-            }
-
-            @Override
-            public void handleSmithing(final PacketWrapper wrapper) {
-                handleIngredient(wrapper); // Base
-                handleIngredient(wrapper); // Addition
-
-                final Item result = wrapper.read(itemType());
-                rewrite(wrapper.user(), result);
-                wrapper.write(Types.ITEM1_13_2, result);
-            }
-
-            @Override
-            public void handleSmithingTransform(final PacketWrapper wrapper) {
-                handleIngredient(wrapper); // Template
-                handleIngredient(wrapper); // Base
-                handleIngredient(wrapper); // Additions
-
-                final Item result = wrapper.read(itemType());
-                rewrite(wrapper.user(), result);
-                wrapper.write(Types.ITEM1_13_2, result);
-            }
-
-            @Override
-            protected void handleIngredient(final PacketWrapper wrapper) {
-                final Item[] items = wrapper.read(itemArrayType());
-                wrapper.write(Types.ITEM1_13_2_ARRAY, items);
-                for (final Item item : items) {
-                    rewrite(wrapper.user(), item);
-                }
-            }
         }.register(ClientboundPackets1_20_2.UPDATE_RECIPES);
     }
 

common/src/main/java/com/viaversion/viabackwards/protocol/v1_20_2to1_20/rewriter/EntityPacketRewriter1_20_2.java

@@ -108,7 +108,7 @@ public final class EntityPacketRewriter1_20_2 extends EntityRewriter<Clientbound
             @Override
             public void register() {
                 handler(wrapper -> {
-                    final ConfigurationPacketStorage configurationPacketStorage = wrapper.user().remove(ConfigurationPacketStorage.class);
+                    final ConfigurationPacketStorage configurationPacketStorage = wrapper.user().get(ConfigurationPacketStorage.class);
                     wrapper.passthrough(Types.INT); // Entity id
                     wrapper.passthrough(Types.BOOLEAN); // Hardcore
 
@@ -198,8 +198,8 @@ public final class EntityPacketRewriter1_20_2 extends EntityRewriter<Clientbound
 
     @Override
     protected void registerRewrites() {
-        filter().handler((event, meta) -> meta.setDataType(Types1_20.ENTITY_DATA_TYPES.byId(meta.dataType().typeId())));
-        registerMetaTypeHandler(Types1_20.ENTITY_DATA_TYPES.itemType, Types1_20.ENTITY_DATA_TYPES.blockStateType, Types1_20.ENTITY_DATA_TYPES.optionalBlockStateType, Types1_20.ENTITY_DATA_TYPES.particleType, null, null);
+        filter().handler((event, data) -> data.setDataType(Types1_20.ENTITY_DATA_TYPES.byId(data.dataType().typeId())));
+        registerEntityDataTypeHandler(Types1_20.ENTITY_DATA_TYPES.itemType, Types1_20.ENTITY_DATA_TYPES.blockStateType, Types1_20.ENTITY_DATA_TYPES.optionalBlockStateType, Types1_20.ENTITY_DATA_TYPES.particleType, null, null);
         registerBlockStateHandler(EntityTypes1_19_4.ABSTRACT_MINECART, 11);
 
         filter().type(EntityTypes1_19_4.DISPLAY).removeIndex(10);

common/src/main/java/com/viaversion/viabackwards/protocol/v1_20_2to1_20/storage/ConfigurationPacketStorage.java

@@ -18,13 +18,13 @@
 package com.viaversion.viabackwards.protocol.v1_20_2to1_20.storage;
 
 import com.google.common.base.Preconditions;
+import com.viaversion.nbt.tag.CompoundTag;
 import com.viaversion.viabackwards.protocol.v1_20_2to1_20.Protocol1_20_2To1_20;
 import com.viaversion.viaversion.api.connection.StorableObject;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.protocol.packet.PacketType;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.protocols.v1_19_3to1_19_4.packet.ClientboundPackets1_19_4;
-import com.viaversion.nbt.tag.CompoundTag;
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 import java.util.ArrayList;
@@ -77,17 +77,21 @@ public final class ConfigurationPacketStorage implements StorableObject {
 
     public void sendQueuedPackets(final UserConnection connection) {
         // Send resource pack at the end
+        List<QueuedPacket> packets = rawPackets;
         if (resourcePack != null) {
-            rawPackets.add(resourcePack);
+            packets = new ArrayList<>(rawPackets);
+            packets.add(resourcePack);
             resourcePack = null;
         }
 
-        for (final QueuedPacket queuedPacket : rawPackets) {
+        for (final QueuedPacket queuedPacket : packets) {
+            // Don't clear the list or use the original buffer, we might need them later if a server skips subsequent config phases
+            final ByteBuf buf = queuedPacket.buf().copy();
             try {
-                final PacketWrapper packet = PacketWrapper.create(queuedPacket.packetType(), queuedPacket.buf(), connection);
+                final PacketWrapper packet = PacketWrapper.create(queuedPacket.packetType(), buf, connection);
                 packet.send(Protocol1_20_2To1_20.class);
             } finally {
-                queuedPacket.buf().release();
+                buf.release();
             }
         }
     }