Start working on 5.0.0

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

@@ -21,7 +21,7 @@ tasks {
 }
 
 java {
-    javaTarget(8)
+    javaTarget(17)
     withSourcesJar()
 }
 

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

@@ -68,7 +68,7 @@ import java.util.logging.Logger;
 
 public interface ViaBackwardsPlatform {
 
-    String MINIMUM_VV_VERSION = "4.10.2";
+    String MINIMUM_VV_VERSION = "5.0.0";
 
     /**
      * Initialize ViaBackwards.

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

@@ -41,12 +41,12 @@ public class EntityPositionHandler {
         this.storageSupplier = storageSupplier;
     }
 
-    public void cacheEntityPosition(PacketWrapper wrapper, boolean create, boolean relative) throws Exception {
+    public void cacheEntityPosition(PacketWrapper wrapper, boolean create, boolean relative) {
         cacheEntityPosition(wrapper,
             wrapper.get(Type.DOUBLE, 0), wrapper.get(Type.DOUBLE, 1), wrapper.get(Type.DOUBLE, 2), create, relative);
     }
 
-    public void cacheEntityPosition(PacketWrapper wrapper, double x, double y, double z, boolean create, boolean relative) throws Exception {
+    public void cacheEntityPosition(PacketWrapper wrapper, double x, double y, double z, boolean create, boolean relative) {
         int entityId = wrapper.get(Type.VAR_INT, 0);
         StoredEntityData storedEntity = entityRewriter.tracker(wrapper.user()).entityData(entityId);
         if (storedEntity == null) {

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

@@ -22,15 +22,15 @@ public abstract class EntityPositionStorage {
     private double y;
     private double z;
 
-    public double getX() {
+    public double x() {
         return x;
     }
 
-    public double getY() {
+    public double y() {
         return y;
     }
 
-    public double getZ() {
+    public double z() {
         return z;
     }
 

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

@@ -29,15 +29,15 @@ public abstract class PlayerPositionStorage implements StorableObject {
     protected PlayerPositionStorage() {
     }
 
-    public double getX() {
+    public double x() {
         return x;
     }
 
-    public double getY() {
+    public double y() {
         return y;
     }
 
-    public double getZ() {
+    public double z() {
         return z;
     }
 
@@ -53,7 +53,7 @@ public abstract class PlayerPositionStorage implements StorableObject {
         this.z = z;
     }
 
-    public void setCoordinates(PacketWrapper wrapper, boolean relative) throws Exception {
+    public void setCoordinates(PacketWrapper wrapper, boolean relative) {
         setCoordinates(wrapper.get(Type.DOUBLE, 0), wrapper.get(Type.DOUBLE, 1), wrapper.get(Type.DOUBLE, 2), relative);
     }
 

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

@@ -22,12 +22,7 @@ import com.viaversion.viaversion.api.minecraft.metadata.Metadata;
 import java.util.List;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
-public final class WrappedMetadata {
+public record WrappedMetadata(List<Metadata> metadataList) {
-    private final List<Metadata> metadataList;
-
-    public WrappedMetadata(List<Metadata> metadataList) {
-        this.metadataList = metadataList;
-    }
 
     public boolean has(Metadata data) {
         return this.metadataList.contains(data);
@@ -53,13 +48,4 @@ public final class WrappedMetadata {
         }
         return null;
     }
-
-    public List<Metadata> metadataList() {
-        return metadataList;
-    }
-
-    @Override
-    public String toString() {
-        return "MetaStorage{" + "metaDataList=" + metadataList + '}';
-    }
 }

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

@@ -146,29 +146,18 @@ public class EnchantmentRewriter {
     }
 
     public static String getRomanNumber(int number) {
-        switch (number) {
+        return switch (number) {
-            case 1:
+            case 1 -> "I";
-                return "I";
+            case 2 -> "II";
-            case 2:
+            case 3 -> "III";
-                return "II";
+            case 4 -> "IV";
-            case 3:
+            case 5 -> "V";
-                return "III";
+            case 6 -> "VI";
-            case 4:
+            case 7 -> "VII";
-                return "IV";
+            case 8 -> "VIII";
-            case 5:
+            case 9 -> "IX";
-                return "V";
+            case 10 -> "X";
-            case 6:
+            default -> Integer.toString(number);
-                return "VI";
+        };
-            case 7:
-                return "VII";
-            case 8:
-                return "VIII";
-            case 9:
-                return "IX";
-            case 10:
-                return "X";
-            default:
-                return Integer.toString(number);
-        }
     }
 }

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

@@ -138,7 +138,7 @@ public abstract class EntityRewriter<C extends ClientboundPacketType, T extends
      * @param wrapper packet wrapper
      * @return unmapped (!) entity type
      */
-    protected EntityType trackAndMapEntity(PacketWrapper wrapper) throws Exception {
+    protected EntityType trackAndMapEntity(PacketWrapper wrapper) {
         int typeId = wrapper.get(Type.VAR_INT, 1);
         EntityType entityType = typeFromId(typeId);
         tracker(wrapper.user()).addEntity(wrapper.get(Type.VAR_INT, 0), entityType);

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

@@ -279,12 +279,12 @@ public abstract class LegacyBlockItemRewriter<C extends ClientboundPacketType, S
             tags.put(pos, tag);
 
             // Handle given Block Entities
-            if (pos.getY() < 0 || pos.getY() > 255) continue; // 1.17
+            if (pos.y() < 0 || pos.y() > 255) continue; // 1.17
 
-            ChunkSection section = chunk.getSections()[pos.getY() >> 4];
+            ChunkSection section = chunk.getSections()[pos.y() >> 4];
             if (section == null) continue;
 
-            int block = section.palette(PaletteType.BLOCKS).idAt(pos.getX(), pos.getY() & 0xF, pos.getZ());
+            int block = section.palette(PaletteType.BLOCKS).idAt(pos.x(), pos.y() & 0xF, pos.z());
 
             MappedLegacyBlockItem settings = getMappedBlock(block);
             if (settings != null && settings.hasBlockEntityHandler()) {
@@ -379,51 +379,10 @@ public abstract class LegacyBlockItemRewriter<C extends ClientboundPacketType, S
         return BackwardsMappingDataLoader.INSTANCE.loadFromDataDir(name);
     }
 
-    private static final class Pos {
+    private record Pos(int x, short y, int z) {
 
-        private final int x;
+        public Pos( int x, int y, int z){
-        private final short y;
+            this(x, (short) y, z);
-        private final int z;
-
-        private Pos(int x, int y, int z) {
-            this.x = x;
-            this.y = (short) y;
-            this.z = z;
-        }
-
-        public int getX() {
-            return x;
-        }
-
-        public int getY() {
-            return y;
-        }
-
-        public int getZ() {
-            return z;
-        }
-
-        @Override
-        public boolean equals(Object o) {
-            if (this == o) return true;
-            if (o == null || getClass() != o.getClass()) return false;
-            Pos pos = (Pos) o;
-            if (x != pos.x) return false;
-            if (y != pos.y) return false;
-            return z == pos.z;
-        }
-
-        @Override
-        public int hashCode() {
-            int result = x;
-            result = 31 * result + y;
-            result = 31 * result + z;
-            return result;
-        }
-
-        @Override
-        public String toString() {
-            return "Pos{" + "x=" + x + ", y=" + y + ", z=" + z + '}';
         }
     }
 }

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

@@ -155,8 +155,8 @@ public class LegacyEnchantmentRewriter {
             }
 
             Tag hideFlags = tag.remove(nbtTagName + "|oldHideFlags");
-            if (hideFlags instanceof IntTag) {
+            if (hideFlags instanceof IntTag intTag) {
-                tag.putInt("HideFlags", ((IntTag) hideFlags).asByte());
+                tag.putInt("HideFlags", intTag.asByte());
             } else {
                 tag.remove("HideFlags");
             }

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

@@ -170,13 +170,13 @@ public abstract class LegacyEntityRewriter<C extends ClientboundPacketType, T ex
     }
 
     @Deprecated
-    protected void addTrackedEntity(PacketWrapper wrapper, int entityId, EntityType type) throws Exception {
+    protected void addTrackedEntity(PacketWrapper wrapper, int entityId, EntityType type) {
         tracker(wrapper.user()).addEntity(entityId, type);
     }
 
     @FunctionalInterface
     protected interface IdSetter {
 
-        void setId(PacketWrapper wrapper, int id) throws Exception;
+        void setId(PacketWrapper wrapper, int id);
     }
 }

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

@@ -50,11 +50,11 @@ public abstract class LegacySoundRewriter<T extends BackwardsProtocol<?, ?, ?, ?
     public int handleSounds(int soundId) {
         int newSoundId = soundId;
         SoundData data = soundRewrites.get(soundId);
-        if (data != null) return data.getReplacementSound();
+        if (data != null) return data.replacementSound();
 
         for (Int2ObjectMap.Entry<SoundData> entry : soundRewrites.int2ObjectEntrySet()) {
             if (soundId > entry.getIntKey()) {
-                if (entry.getValue().isAdded()) {
+                if (entry.getValue().added()) {
                     newSoundId--;
                 } else {
                     newSoundId++;
@@ -66,41 +66,14 @@ public abstract class LegacySoundRewriter<T extends BackwardsProtocol<?, ?, ?, ?
 
     public boolean hasPitch(int soundId) {
         SoundData data = soundRewrites.get(soundId);
-        return data != null && data.isChangePitch();
+        return data != null && data.changePitch();
     }
 
     public float handlePitch(int soundId) {
         SoundData data = soundRewrites.get(soundId);
-        return data != null ? data.getNewPitch() : 1F;
+        return data != null ? data.newPitch() : 1F;
     }
 
-    public static final class SoundData {
+    public record SoundData(int replacementSound, boolean changePitch, float newPitch, boolean added) {
-        private final int replacementSound;
-        private final boolean changePitch;
-        private final float newPitch;
-        private final boolean added;
-
-        public SoundData(int replacementSound, boolean changePitch, float newPitch, boolean added) {
-            this.replacementSound = replacementSound;
-            this.changePitch = changePitch;
-            this.newPitch = newPitch;
-            this.added = added;
-        }
-
-        public int getReplacementSound() {
-            return replacementSound;
-        }
-
-        public boolean isChangePitch() {
-            return changePitch;
-        }
-
-        public float getNewPitch() {
-            return newPitch;
-        }
-
-        public boolean isAdded() {
-            return added;
-        }
     }
 }

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_10to1_11/packets/BlockItemPackets1_11.java

@@ -70,8 +70,10 @@ public class BlockItemPackets1_11 extends LegacyBlockItemRewriter<ClientboundPac
                 handler(wrapper -> {
                     if (isLlama(wrapper.user())) {
                         Optional<ChestedHorseStorage> horse = getChestedHorse(wrapper.user());
-                        if (!horse.isPresent())
+                        if (horse.isEmpty()) {
                             return;
+                        }
+
                         ChestedHorseStorage storage = horse.get();
                         int currentSlot = wrapper.get(Type.SHORT, 0);
                         wrapper.set(Type.SHORT, 0, ((Integer) (currentSlot = getNewSlotId(storage, currentSlot))).shortValue());
@@ -94,8 +96,9 @@ public class BlockItemPackets1_11 extends LegacyBlockItemRewriter<ClientboundPac
 
                     if (isLlama(wrapper.user())) {
                         Optional<ChestedHorseStorage> horse = getChestedHorse(wrapper.user());
-                        if (!horse.isPresent())
+                        if (horse.isEmpty()) {
                             return;
+                        }
                         ChestedHorseStorage storage = horse.get();
                         stacks = Arrays.copyOf(stacks, !storage.isChested() ? 38 : 53);
 
@@ -156,8 +159,9 @@ public class BlockItemPackets1_11 extends LegacyBlockItemRewriter<ClientboundPac
                 handler(wrapper -> {
                     if (isLlama(wrapper.user())) {
                         Optional<ChestedHorseStorage> horse = getChestedHorse(wrapper.user());
-                        if (!horse.isPresent())
+                        if (horse.isEmpty()) {
                             return;
+                        }
                         ChestedHorseStorage storage = horse.get();
                         int clickSlot = wrapper.get(Type.SHORT, 0);
                         int correctSlot = getOldSlotId(storage, clickSlot);

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_10to1_11/packets/EntityPackets1_11.java

@@ -221,20 +221,14 @@ public class EntityPackets1_11 extends LegacyEntityRewriter<ClientboundPackets1_
          */
         filter().type(EntityTypes1_11.EntityType.ZOMBIE).handler((event, meta) -> {
             switch (meta.id()) {
-                case 13:
+                case 13 -> event.cancel();
-                    event.cancel();
+                case 14 -> event.setIndex(15);
-                    return;
+                case 15 -> event.setIndex(14);
-                case 14:
+                case 16 -> {
-                    event.setIndex(15);
+                    // Profession
-                    break;
-                case 15:
-                    event.setIndex(14);
-                    break;
-                // Profession
-                case 16:
                     event.setIndex(13);
                     meta.setValue(1 + (int) meta.getValue());
-                    break;
+                }
             }
         });
 
@@ -297,18 +291,18 @@ public class EntityPackets1_11 extends LegacyEntityRewriter<ClientboundPackets1_
             int index = event.index();
             // Store them for later (:
             switch (index) {
-                case 16:
+                case 16 -> {
                     storage.setLiamaStrength((int) meta.getValue());
                     event.cancel();
-                    break;
+                }
-                case 17:
+                case 17 -> {
                     storage.setLiamaCarpetColor((int) meta.getValue());
                     event.cancel();
-                    break;
+                }
-                case 18:
+                case 18 -> {
                     storage.setLiamaVariant((int) meta.getValue());
                     event.cancel();
-                    break;
+                }
             }
         });
 

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_10to1_11/packets/PlayerPackets1_11.java

@@ -30,9 +30,9 @@ import com.viaversion.viaversion.protocols.protocol1_9_3to1_9_1_2.ServerboundPac
 import com.viaversion.viaversion.util.ComponentUtil;
 
 public class PlayerPackets1_11 {
-    private static final ValueTransformer<Short, Float> TO_NEW_FLOAT = new ValueTransformer<Short, Float>(Type.FLOAT) {
+    private static final ValueTransformer<Short, Float> TO_NEW_FLOAT = new ValueTransformer<>(Type.FLOAT) {
         @Override
-        public Float transform(PacketWrapper wrapper, Short inputValue) throws Exception {
+        public Float transform(PacketWrapper wrapper, Short inputValue) {
             return inputValue / 16f;
         }
     };

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_11_1to1_12/data/ShoulderTracker.java

@@ -27,6 +27,7 @@ import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.protocols.protocol1_12to1_11_1.ClientboundPackets1_12;
 import com.viaversion.viaversion.protocols.protocol1_9to1_8.Protocol1_9To1_8;
 import com.viaversion.viaversion.util.Key;
+import java.util.Locale;
 
 public class ShoulderTracker extends StoredObject {
     private int entityId;
@@ -85,7 +86,7 @@ public class ShoulderTracker extends StoredObject {
         StringBuilder builder = new StringBuilder();
 
         for (String s : array) {
-            builder.append(s.substring(0, 1).toUpperCase())
+            builder.append(s.substring(0, 1).toUpperCase(Locale.ROOT))
                 .append(s.substring(1))
                 .append(" ");
         }

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_11_1to1_12/packets/BlockItemPackets1_12.java

@@ -220,12 +220,12 @@ public class BlockItemPackets1_12 extends LegacyBlockItemRewriter<ClientboundPac
         boolean hasLongArrayTag = false;
         while (iterator.hasNext()) {
             Map.Entry<String, Tag> entry = iterator.next();
-            if (entry.getValue() instanceof CompoundTag) {
+            if (entry.getValue() instanceof CompoundTag tag) {
                 CompoundTag nestedBackupTag = new CompoundTag();
                 backupTag.put(entry.getKey(), nestedBackupTag);
-                hasLongArrayTag |= handleNbtToClient((CompoundTag) entry.getValue(), nestedBackupTag);
+                hasLongArrayTag |= handleNbtToClient(tag, nestedBackupTag);
-            } else if (entry.getValue() instanceof LongArrayTag) {
+            } else if (entry.getValue() instanceof LongArrayTag tag) {
-                backupTag.put(entry.getKey(), fromLongArrayTag((LongArrayTag) entry.getValue()));
+                backupTag.put(entry.getKey(), fromLongArrayTag(tag));
                 iterator.remove();
                 hasLongArrayTag = true;
             }
@@ -239,9 +239,8 @@ public class BlockItemPackets1_12 extends LegacyBlockItemRewriter<ClientboundPac
         super.handleItemToServer(connection, item);
 
         if (item.tag() != null) {
-            Tag tag = item.tag().remove("Via|LongArrayTags");
+            if (item.tag().remove("Via|LongArrayTags") instanceof CompoundTag tag) {
-            if (tag instanceof CompoundTag) {
+                handleNbtToServer(item.tag(), tag);
-                handleNbtToServer(item.tag(), (CompoundTag) tag);
             }
         }
 

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_11_1to1_12/packets/ChatPackets1_12.java

@@ -30,7 +30,7 @@ import com.viaversion.viaversion.rewriter.ComponentRewriter;
 
 public class ChatPackets1_12 extends RewriterBase<Protocol1_11_1To1_12> {
 
-    public static final ComponentRewriter<ClientboundPackets1_12> COMPONENT_REWRITER = new ComponentRewriter<ClientboundPackets1_12>(null, ComponentRewriter.ReadType.JSON) {
+    public static final ComponentRewriter<ClientboundPackets1_12> COMPONENT_REWRITER = new ComponentRewriter<>(null, ComponentRewriter.ReadType.JSON) {
         @Override
         public void processText(UserConnection connection, JsonElement element) {
             super.processText(connection, element);

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_12_2to1_13/Protocol1_12_2To1_13.java

@@ -54,7 +54,7 @@ public class Protocol1_12_2To1_13 extends BackwardsProtocol<ClientboundPackets1_
     public static final BackwardsMappings MAPPINGS = new BackwardsMappings();
     private final EntityPackets1_13 entityRewriter = new EntityPackets1_13(this);
     private final BlockItemPackets1_13 blockItemPackets = new BlockItemPackets1_13(this);
-    private final TranslatableRewriter<ClientboundPackets1_13> translatableRewriter = new TranslatableRewriter<ClientboundPackets1_13>(this, ComponentRewriter.ReadType.JSON) {
+    private final TranslatableRewriter<ClientboundPackets1_13> translatableRewriter = new TranslatableRewriter<>(this, ComponentRewriter.ReadType.JSON) {
         @Override
         protected void handleTranslate(JsonObject root, String translate) {
             String mappedKey = mappedTranslationKey(translate);
@@ -63,7 +63,7 @@ public class Protocol1_12_2To1_13 extends BackwardsProtocol<ClientboundPackets1_
             }
         }
     };
-    private final TranslatableRewriter<ClientboundPackets1_13> translatableToLegacyRewriter = new TranslatableRewriter<ClientboundPackets1_13>(this, ComponentRewriter.ReadType.JSON) {
+    private final TranslatableRewriter<ClientboundPackets1_13> translatableToLegacyRewriter = new TranslatableRewriter<>(this, ComponentRewriter.ReadType.JSON) {
         @Override
         protected void handleTranslate(JsonObject root, String translate) {
             String mappedKey = mappedTranslationKey(translate);

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_12_2to1_13/data/BackwardsMappings.java

@@ -64,18 +64,11 @@ public class BackwardsMappings extends com.viaversion.viabackwards.api.data.Back
         int mappedId = super.getNewBlockStateId(id);
 
         // https://github.com/ViaVersion/ViaBackwards/issues/290
-        switch (mappedId) {
+        return switch (mappedId) {
-            case 1595:
+            case 1595, 1596, 1597 -> 1584; // brown mushroom block
-            case 1596:
+            case 1611, 1612, 1613 -> 1600; // red mushroom block
-            case 1597:
+            default -> mappedId;
-                return 1584; // brown mushroom block
+        };
-            case 1611:
-            case 1612:
-            case 1613:
-                return 1600; // red mushroom block
-            default:
-                return mappedId;
-        }
     }
 
     @Override

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_12_2to1_13/data/EntityTypeMapping.java

@@ -20,22 +20,14 @@ package com.viaversion.viabackwards.protocol.protocol1_12_2to1_13.data;
 import com.viaversion.viaversion.libs.fastutil.ints.Int2IntMap;
 import com.viaversion.viaversion.libs.fastutil.ints.Int2IntOpenHashMap;
 import com.viaversion.viaversion.protocols.protocol1_13to1_12_2.data.EntityTypeRewriter;
-import java.lang.reflect.Field;
 
 public class EntityTypeMapping {
     private static final Int2IntMap TYPES = new Int2IntOpenHashMap();
 
     static {
         TYPES.defaultReturnValue(-1);
-        try {
+        for (Int2IntMap.Entry entry : EntityTypeRewriter.getEntityTypes().int2IntEntrySet()) {
-            Field field = EntityTypeRewriter.class.getDeclaredField("ENTITY_TYPES");
+            EntityTypeMapping.TYPES.put(entry.getIntValue(), entry.getIntKey());
-            field.setAccessible(true);
-            Int2IntMap entityTypes = (Int2IntMap) field.get(null);
-            for (Int2IntMap.Entry entry : entityTypes.int2IntEntrySet()) {
-                EntityTypeMapping.TYPES.put(entry.getIntValue(), entry.getIntKey());
-            }
-        } catch (NoSuchFieldException | IllegalAccessException ex) {
-            ex.printStackTrace();
         }
     }
 

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_12_2to1_13/data/ParticleMapping.java

@@ -24,6 +24,7 @@ import com.viaversion.viaversion.api.minecraft.item.Item;
 import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import com.viaversion.viaversion.api.type.Type;
 import java.util.List;
+import org.checkerframework.checker.nullness.qual.Nullable;
 
 public class ParticleMapping {
     private static final ParticleData[] particles;
@@ -31,7 +32,7 @@ public class ParticleMapping {
     static {
         ParticleHandler blockHandler = new ParticleHandler() {
             @Override
-            public int[] rewrite(Protocol1_12_2To1_13 protocol, PacketWrapper wrapper) throws Exception {
+            public int[] rewrite(Protocol1_12_2To1_13 protocol, PacketWrapper wrapper) {
                 return rewrite(wrapper.read(Type.VAR_INT));
             }
 
@@ -63,13 +64,13 @@ public class ParticleMapping {
             rewrite(4),  // (4->4)   minecraft:bubble -> bubble
             rewrite(29), // (5->29)  minecraft:cloud -> cloud
             rewrite(9),  // (6->9)   minecraft:crit -> crit
-            rewrite(44), // (7->44)  minecraft:damage_indicator -> damageIndicator‌
+            rewrite(44), // (7->44)  minecraft:damage_indicator -> damageIndicator
             rewrite(42), // (8->42)  minecraft:dragon_breath -> dragonbreath
             rewrite(19), // (9->19)  minecraft:dripping_lava -> dripLava
             rewrite(18), // (10->18) minecraft:dripping_water -> dripWater
             rewrite(30, new ParticleHandler() {
                 @Override
-                public int[] rewrite(Protocol1_12_2To1_13 protocol, PacketWrapper wrapper) throws Exception {
+                public int[] rewrite(Protocol1_12_2To1_13 protocol, PacketWrapper wrapper) {
                     float r = wrapper.read(Type.FLOAT);
                     float g = wrapper.read(Type.FLOAT);
                     float b = wrapper.read(Type.FLOAT);
@@ -107,7 +108,7 @@ public class ParticleMapping {
             rewrite(14), // (26->14) minecraft:instant_effect -> instantSpell
             rewrite(36, new ParticleHandler() {
                 @Override
-                public int[] rewrite(Protocol1_12_2To1_13 protocol, PacketWrapper wrapper) throws Exception {
+                public int[] rewrite(Protocol1_12_2To1_13 protocol, PacketWrapper wrapper) {
                     return rewrite(protocol, wrapper.read(Type.ITEM1_13));
                 }
 
@@ -160,7 +161,7 @@ public class ParticleMapping {
 
     public interface ParticleHandler {
 
-        int[] rewrite(Protocol1_12_2To1_13 protocol, PacketWrapper wrapper) throws Exception;
+        int[] rewrite(Protocol1_12_2To1_13 protocol, PacketWrapper wrapper);
 
         int[] rewrite(Protocol1_12_2To1_13 protocol, List<Particle.ParticleData<?>> data);
 
@@ -182,12 +183,12 @@ public class ParticleMapping {
             this(historyId, null);
         }
 
-        public int[] rewriteData(Protocol1_12_2To1_13 protocol, PacketWrapper wrapper) throws Exception {
+        public int @Nullable [] rewriteData(Protocol1_12_2To1_13 protocol, PacketWrapper wrapper) {
             if (handler == null) return null;
             return handler.rewrite(protocol, wrapper);
         }
 
-        public int[] rewriteMeta(Protocol1_12_2To1_13 protocol, List<Particle.ParticleData<?>> data) {
+        public int @Nullable [] rewriteMeta(Protocol1_12_2To1_13 protocol, List<Particle.ParticleData<?>> data) {
             if (handler == null) return null;
             return handler.rewrite(protocol, data);
         }

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_12_2to1_13/packets/BlockItemPackets1_13.java

@@ -358,28 +358,13 @@ public class BlockItemPackets1_13 extends BackwardsItemRewriter<ClientboundPacke
             if (chunk.isBiomeData()) {
                 for (int i = 0; i < 256; i++) {
                     int biome = chunk.getBiomeData()[i];
-                    int newId = -1;
+                    int newId = switch (biome) {
-                    switch (biome) {
+                        case 40, 41, 42, 43 -> 9; // end biomes
-                        case 40: // end biomes
+                        case 47, 48, 49 -> 24; // deep ocean biomes
-                        case 41:
+                        case 50 -> 10; // deep frozen... let's just pick the frozen variant
-                        case 42:
+                        case 44, 45, 46 -> 0; // the other new ocean biomes
-                        case 43:
+                        default -> -1;
-                            newId = 9;
+                    };
-                            break;
-                        case 47: // deep ocean biomes
-                        case 48:
-                        case 49:
-                            newId = 24;
-                            break;
-                        case 50: // deep frozen... let's just pick the frozen variant
-                            newId = 10;
-                            break;
-                        case 44: // the other new ocean biomes
-                        case 45:
-                        case 46:
-                            newId = 0;
-                            break;
-                    }
 
                     if (newId != -1) {
                         chunk.getBiomeData()[i] = newId;
@@ -978,7 +963,7 @@ public class BlockItemPackets1_13 extends BackwardsItemRewriter<ClientboundPacke
     }
 
     // TODO find a less hacky way to do this (https://bugs.mojang.com/browse/MC-74231)
-    private static void flowerPotSpecialTreatment(UserConnection user, int blockState, Position position) throws Exception {
+    private static void flowerPotSpecialTreatment(UserConnection user, int blockState, Position position) {
         if (FlowerPotHandler.isFlowah(blockState)) {
             BackwardsBlockEntityProvider beProvider = Via.getManager().getProviders().get(BackwardsBlockEntityProvider.class);
 

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_12_2to1_13/packets/EntityPackets1_13.java

@@ -66,9 +66,9 @@ public class EntityPackets1_13 extends LegacyEntityRewriter<ClientboundPackets1_
 
                     PlayerPositionStorage1_13 playerStorage = wrapper.user().get(PlayerPositionStorage1_13.class);
                     byte bitField = wrapper.get(Type.BYTE, 0);
-                    playerStorage.setX(toSet(bitField, 0, playerStorage.getX(), wrapper.get(Type.DOUBLE, 0)));
+                    playerStorage.setX(toSet(bitField, 0, playerStorage.x(), wrapper.get(Type.DOUBLE, 0)));
-                    playerStorage.setY(toSet(bitField, 1, playerStorage.getY(), wrapper.get(Type.DOUBLE, 1)));
+                    playerStorage.setY(toSet(bitField, 1, playerStorage.y(), wrapper.get(Type.DOUBLE, 1)));
-                    playerStorage.setZ(toSet(bitField, 2, playerStorage.getZ(), wrapper.get(Type.DOUBLE, 2)));
+                    playerStorage.setZ(toSet(bitField, 2, playerStorage.z(), wrapper.get(Type.DOUBLE, 2)));
                 });
             }
         });
@@ -90,7 +90,7 @@ public class EntityPackets1_13 extends LegacyEntityRewriter<ClientboundPackets1_
 
                 handler(wrapper -> {
                     Optional<EntityTypes1_13.ObjectType> optionalType = EntityTypes1_13.ObjectType.findById(wrapper.get(Type.BYTE, 0));
-                    if (!optionalType.isPresent()) return;
+                    if (optionalType.isEmpty()) return;
 
                     EntityTypes1_13.ObjectType type = optionalType.get();
                     if (type == EntityTypes1_13.ObjectType.FALLING_BLOCK) {
@@ -100,17 +100,12 @@ public class EntityPackets1_13 extends LegacyEntityRewriter<ClientboundPackets1_
                         wrapper.set(Type.INT, 0, combined);
                     } else if (type == EntityTypes1_13.ObjectType.ITEM_FRAME) {
                         int data = wrapper.get(Type.INT, 0);
-                        switch (data) {
+                        data = switch (data) {
-                            case 3:
+                            case 3 -> 0;
-                                data = 0;
+                            case 4 -> 1;
-                                break;
+                            case 5 -> 3;
-                            case 4:
+                            default -> data;
-                                data = 1;
+                        };
-                                break;
-                            case 5:
-                                data = 3;
-                                break;
-                        }
                         wrapper.set(Type.INT, 0, data);
                     } else if (type == EntityTypes1_13.ObjectType.TRIDENT) {
                         wrapper.set(Type.BYTE, 0, (byte) EntityTypes1_13.ObjectType.TIPPED_ARROW.getId());
@@ -230,9 +225,9 @@ public class EntityPackets1_13 extends LegacyEntityRewriter<ClientboundPackets1_
             positionAndLook.write(Type.DOUBLE, 0D);
 
             //TODO properly cache and calculate head position?
-            EntityPositionHandler.writeFacingDegrees(positionAndLook, positionStorage.getX(),
+            EntityPositionHandler.writeFacingDegrees(positionAndLook, positionStorage.x(),
-                anchor == 1 ? positionStorage.getY() + 1.62 : positionStorage.getY(),
+                anchor == 1 ? positionStorage.y() + 1.62 : positionStorage.y(),
-                positionStorage.getZ(), x, y, z);
+                positionStorage.z(), x, y, z);
 
             positionAndLook.write(Type.BYTE, (byte) 7); // bitfield, 0=absolute, 1=relative - x,y,z relative, yaw,pitch absolute
             positionAndLook.write(Type.VAR_INT, -1);

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_12_2to1_13/packets/PlayerPacket1_13.java

@@ -377,18 +377,15 @@ public class PlayerPacket1_13 extends RewriterBase<Protocol1_12_2To1_13> {
         protocol.registerServerbound(ServerboundPackets1_12_1.PLUGIN_MESSAGE, wrapper -> {
             String channel = wrapper.read(Type.STRING);
             switch (channel) {
-                case "MC|BSign":
+                case "MC|BSign", "MC|BEdit" -> {
-                case "MC|BEdit":
                     wrapper.setPacketType(ServerboundPackets1_13.EDIT_BOOK);
                     Item book = wrapper.read(Type.ITEM1_8);
                     wrapper.write(Type.ITEM1_13, protocol.getItemRewriter().handleItemToServer(wrapper.user(), book));
                     boolean signing = channel.equals("MC|BSign");
                     wrapper.write(Type.BOOLEAN, signing);
-                    break;
+                }
-                case "MC|ItemName":
+                case "MC|ItemName" -> wrapper.setPacketType(ServerboundPackets1_13.RENAME_ITEM);
-                    wrapper.setPacketType(ServerboundPackets1_13.RENAME_ITEM);
+                case "MC|AdvCmd" -> {
-                    break;
-                case "MC|AdvCmd":
                     byte type = wrapper.read(Type.BYTE);
                     if (type == 0) {
                         //Information from https://wiki.vg/index.php?title=Plugin_channels&oldid=14089
@@ -406,8 +403,8 @@ public class PlayerPacket1_13 extends RewriterBase<Protocol1_12_2To1_13> {
                     } else {
                         wrapper.cancel();
                     }
-                    break;
+                }
-                case "MC|AutoCmd": {
+                case "MC|AutoCmd" -> {
                     wrapper.setPacketType(ServerboundPackets1_13.UPDATE_COMMAND_BLOCK);
 
                     int x = wrapper.read(Type.INT);
@@ -430,9 +427,8 @@ public class PlayerPacket1_13 extends RewriterBase<Protocol1_12_2To1_13> {
                     if (wrapper.read(Type.BOOLEAN)) flags |= 0x04; //Automatic
 
                     wrapper.write(Type.BYTE, flags);
-                    break;
                 }
-                case "MC|Struct": {
+                case "MC|Struct" -> {
                     wrapper.setPacketType(ServerboundPackets1_13.UPDATE_STRUCTURE_BLOCK);
                     int x = wrapper.read(Type.INT);
                     int y = wrapper.read(Type.INT);
@@ -471,24 +467,18 @@ public class PlayerPacket1_13 extends RewriterBase<Protocol1_12_2To1_13> {
                     wrapper.passthrough(Type.VAR_LONG); //Seed
 
                     wrapper.write(Type.BYTE, flags);
-                    break;
                 }
-                case "MC|Beacon":
+                case "MC|Beacon" -> {
                     wrapper.setPacketType(ServerboundPackets1_13.SET_BEACON_EFFECT);
                     wrapper.write(Type.VAR_INT, wrapper.read(Type.INT)); //Primary Effect
-
                     wrapper.write(Type.VAR_INT, wrapper.read(Type.INT)); //Secondary Effect
-
+                }
-                    break;
+                case "MC|TrSel" -> {
-                case "MC|TrSel":
                     wrapper.setPacketType(ServerboundPackets1_13.SELECT_TRADE);
                     wrapper.write(Type.VAR_INT, wrapper.read(Type.INT)); //Slot
-
+                }
-                    break;
+                case "MC|PickItem" -> wrapper.setPacketType(ServerboundPackets1_13.PICK_ITEM);
-                case "MC|PickItem":
+                default -> {
-                    wrapper.setPacketType(ServerboundPackets1_13.PICK_ITEM);
-                    break;
-                default:
                     String newChannel = InventoryPackets.getNewPluginChannelId(channel);
                     if (newChannel == null) {
                         if (!Via.getConfig().isSuppressConversionWarnings() || Via.getManager().isDebug()) {
@@ -514,10 +504,9 @@ public class PlayerPacket1_13 extends RewriterBase<Protocol1_12_2To1_13> {
                             wrapper.write(Type.REMAINING_BYTES, Joiner.on('\0').join(rewrittenChannels).getBytes(StandardCharsets.UTF_8));
                         } else {
                             wrapper.cancel();
-                            return;
                         }
                     }
-                    break;
+                }
             }
         });
 
@@ -535,25 +524,19 @@ public class PlayerPacket1_13 extends RewriterBase<Protocol1_12_2To1_13> {
                         String name = "";
                         // categories 0-7 (items, blocks, entities) - probably not feasible
                         switch (categoryId) {
-                            case 0:
+                            case 0, 1, 2, 3, 4, 5, 6, 7 -> {
-                            case 1:
-                            case 2:
-                            case 3:
-                            case 4:
-                            case 5:
-                            case 6:
-                            case 7:
                                 wrapper.read(Type.VAR_INT); // remove value
                                 newSize--;
                                 continue;
-                            case 8:
+                            }
+                            case 8 -> {
                                 name = protocol.getMappingData().getStatisticMappings().get(statisticId);
                                 if (name == null) {
                                     wrapper.read(Type.VAR_INT);
                                     newSize--;
                                     continue;
                                 }
-                                break;
+                            }
                         }
 
                         wrapper.write(Type.STRING, name); // string id

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_12_2to1_13/providers/BackwardsBlockEntityProvider.java

@@ -62,7 +62,7 @@ public class BackwardsBlockEntityProvider implements Provider {
      * @param position The position of the block entity
      * @param tag      The block entity tag
      */
-    public CompoundTag transform(UserConnection user, Position position, CompoundTag tag) throws Exception {
+    public CompoundTag transform(UserConnection user, Position position, CompoundTag tag) {
         final StringTag idTag = tag.getStringTag("id");
         if (idTag == null) {
             return tag;
@@ -90,7 +90,7 @@ public class BackwardsBlockEntityProvider implements Provider {
      * @param position The position of the block entity
      * @param id       The block entity id
      */
-    public CompoundTag transform(UserConnection user, Position position, String id) throws Exception {
+    public CompoundTag transform(UserConnection user, Position position, String id) {
         CompoundTag tag = new CompoundTag();
         tag.putString("id", id);
         tag.putInt("x", Math.toIntExact(position.x()));

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_13_2to1_14/data/CommandRewriter1_14.java

@@ -28,9 +28,7 @@ public class CommandRewriter1_14 extends CommandRewriter<ClientboundPackets1_14>
     public CommandRewriter1_14(Protocol1_13_2To1_14 protocol) {
         super(protocol);
 
-        this.parserHandlers.put("minecraft:nbt_tag", wrapper -> {
+        this.parserHandlers.put("minecraft:nbt_tag", wrapper -> wrapper.write(Type.VAR_INT, 2)); // Greedy phrase
-            wrapper.write(Type.VAR_INT, 2); // Greedy phrase
-        });
         this.parserHandlers.put("minecraft:time", wrapper -> {
             wrapper.write(Type.BYTE, (byte) (0x01)); // Flags
             wrapper.write(Type.INT, 0); // Min value
@@ -39,15 +37,12 @@ public class CommandRewriter1_14 extends CommandRewriter<ClientboundPackets1_14>
 
     @Override
     public @Nullable String handleArgumentType(String argumentType) {
-        switch (argumentType) {
+        return switch (argumentType) {
-            case "minecraft:nbt_compound_tag":
+            case "minecraft:nbt_compound_tag" -> "minecraft:nbt";
-                return "minecraft:nbt";
+            case "minecraft:nbt_tag" -> "brigadier:string";
-            case "minecraft:nbt_tag":
+            case "minecraft:time" -> "brigadier:integer";
-                return "brigadier:string";
+            default -> super.handleArgumentType(argumentType);
-            case "minecraft:time":
+        };
-                return "brigadier:integer";
-        }
-        return super.handleArgumentType(argumentType);
     }
 
 }

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_13_2to1_14/packets/BlockItemPackets1_14.java

@@ -86,50 +86,40 @@ public class BlockItemPackets1_14 extends BackwardsItemRewriter<ClientboundPacke
                 slotSize = (type + 1) * 9;
             } else {
                 switch (type) {
-                    case 11:
+                    case 11 -> stringType = "minecraft:crafting_table";
-                        stringType = "minecraft:crafting_table";
+                    case 9, 20, 13, 14 -> {
-                        break;
-                    case 9: //blast furnace
-                    case 20: //smoker
-                    case 13: //furnace
-                    case 14: //grindstone
                         if (type == 9) containerTitle = "Blast Furnace";
                         else if (type == 20) containerTitle = "Smoker";
                         else if (type == 14) containerTitle = "Grindstone";
                         stringType = "minecraft:furnace";
                         slotSize = 3;
-                        break;
+                    }
-                    case 6:
+                    case 6 -> {
                         stringType = "minecraft:dropper";
                         slotSize = 9;
-                        break;
+                    }
-                    case 12:
+                    case 12 -> stringType = "minecraft:enchanting_table";
-                        stringType = "minecraft:enchanting_table";
+                    case 10 -> {
-                        break;
-                    case 10:
                         stringType = "minecraft:brewing_stand";
                         slotSize = 5;
-                        break;
+                    }
-                    case 18:
+                    case 18 -> stringType = "minecraft:villager";
-                        stringType = "minecraft:villager";
+                    case 8 -> {
-                        break;
-                    case 8:
                         stringType = "minecraft:beacon";
                         slotSize = 1;
-                        break;
+                    }
-                    case 21: //cartography_table
+                    case 21, 7 -> {
-                    case 7:
                         if (type == 21) containerTitle = "Cartography Table";
                         stringType = "minecraft:anvil";
-                        break;
+                    }
-                    case 15:
+                    case 15 -> {
                         stringType = "minecraft:hopper";
                         slotSize = 5;
-                        break;
+                    }
-                    case 19:
+                    case 19 -> {
                         stringType = "minecraft:shulker_box";
                         slotSize = 27;
-                        break;
+                    }
                 }
             }
 
@@ -266,20 +256,18 @@ public class BlockItemPackets1_14 extends BackwardsItemRewriter<ClientboundPacke
                 type = Key.stripMinecraftNamespace(type);
                 if (removedTypes.contains(type)) {
                     switch (type) {
-                        case "blasting":
+                        case "blasting", "smoking", "campfire_cooking" -> {
-                        case "smoking":
-                        case "campfire_cooking":
                             wrapper.read(Type.STRING); // Group
                             wrapper.read(Type.ITEM1_13_2_ARRAY); // Ingredients
                             wrapper.read(Type.ITEM1_13_2);
                             wrapper.read(Type.FLOAT); // EXP
                             wrapper.read(Type.VAR_INT); // Cooking time
-                            break;
+                        }
-                        case "stonecutting":
+                        case "stonecutting" -> {
                             wrapper.read(Type.STRING); // Group?
                             wrapper.read(Type.ITEM1_13_2_ARRAY); // Ingredients
                             wrapper.read(Type.ITEM1_13_2); // Result
-                            break;
+                        }
                     }
                     deleted++;
                     continue;

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_13_2to1_14/packets/EntityPackets1_14.java

@@ -53,7 +53,7 @@ public class EntityPackets1_14 extends LegacyEntityRewriter<ClientboundPackets1_
 
     //TODO work the method into this class alone
     @Override
-    protected void addTrackedEntity(PacketWrapper wrapper, int entityId, EntityType type) throws Exception {
+    protected void addTrackedEntity(PacketWrapper wrapper, int entityId, EntityType type) {
         super.addTrackedEntity(wrapper, entityId, type);
 
         // Cache the position for every newly tracked entity
@@ -143,27 +143,15 @@ public class EntityPackets1_14 extends LegacyEntityRewriter<ClientboundPackets1_
                     EntityTypes1_13.ObjectType objectType;
                     if (entityType.isOrHasParent(EntityTypes1_13.EntityType.MINECART_ABSTRACT)) {
                         objectType = EntityTypes1_13.ObjectType.MINECART;
-                        int data = 0;
+                        int data = switch (entityType) {
-                        switch (entityType) {
+                            case CHEST_MINECART -> 1;
-                            case CHEST_MINECART:
+                            case FURNACE_MINECART -> 2;
-                                data = 1;
+                            case TNT_MINECART -> 3;
-                                break;
+                            case SPAWNER_MINECART -> 4;
-                            case FURNACE_MINECART:
+                            case HOPPER_MINECART -> 5;
-                                data = 2;
+                            case COMMAND_BLOCK_MINECART -> 6;
-                                break;
+                            default -> 0;
-                            case TNT_MINECART:
+                        };
-                                data = 3;
-                                break;
-                            case SPAWNER_MINECART:
-                                data = 4;
-                                break;
-                            case HOPPER_MINECART:
-                                data = 5;
-                                break;
-                            case COMMAND_BLOCK_MINECART:
-                                data = 6;
-                                break;
-                        }
                         if (data != 0)
                             wrapper.set(Type.INT, 0, data);
                     } else {

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_13_2to1_14/packets/SoundPackets1_14.java

@@ -61,9 +61,9 @@ public class SoundPackets1_14 extends RewriterBase<Protocol1_13_2To1_14> {
 
             float volume = wrapper.read(Type.FLOAT);
             float pitch = wrapper.read(Type.FLOAT);
-            int x = (int) (entityStorage.getX() * 8D);
+            int x = (int) (entityStorage.x() * 8D);
-            int y = (int) (entityStorage.getY() * 8D);
+            int y = (int) (entityStorage.y() * 8D);
-            int z = (int) (entityStorage.getZ() * 8D);
+            int z = (int) (entityStorage.z() * 8D);
 
             PacketWrapper soundPacket = wrapper.create(ClientboundPackets1_13.SOUND);
             soundPacket.write(Type.VAR_INT, newId);

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_13_2to1_14/storage/ChunkLightStorage.java

@@ -71,21 +71,22 @@ public class ChunkLightStorage implements StorableObject {
         return new HashMap<>();
     }
 
-    public static class ChunkLight {
+    public record ChunkLight(byte[][] skyLight, byte[][] blockLight) {
-        private final byte[][] skyLight;
-        private final byte[][] blockLight;
 
-        public ChunkLight(byte[][] skyLight, byte[][] blockLight) {
+        @Override
-            this.skyLight = skyLight;
+        public boolean equals(final Object o) {
-            this.blockLight = blockLight;
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+            final ChunkLight that = (ChunkLight) o;
+            if (!Arrays.deepEquals(skyLight, that.skyLight)) return false;
+            return Arrays.deepEquals(blockLight, that.blockLight);
         }
 
-        public byte[][] skyLight() {
+        @Override
-            return skyLight;
+        public int hashCode() {
-        }
+            int result = Arrays.deepHashCode(skyLight);
-
+            result = 31 * result + Arrays.deepHashCode(blockLight);
-        public byte[][] blockLight() {
+            return result;
-            return blockLight;
         }
     }
 }

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_13to1_13_1/Protocol1_13To1_13_1.java

@@ -76,7 +76,7 @@ public class Protocol1_13To1_13_1 extends BackwardsProtocol<ClientboundPackets1_
             @Override
             public void register() {
                 map(Type.VAR_INT);
-                map(Type.STRING, new ValueTransformer<String, String>(Type.STRING) {
+                map(Type.STRING, new ValueTransformer<>(Type.STRING) {
                     @Override
                     public String transform(PacketWrapper wrapper, String inputValue) {
                         // 1.13 starts sending slash at start, so we remove it for compatibility

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_13to1_13_1/data/CommandRewriter1_13_1.java

@@ -28,9 +28,7 @@ public class CommandRewriter1_13_1 extends CommandRewriter<ClientboundPackets1_1
     public CommandRewriter1_13_1(Protocol1_13To1_13_1 protocol) {
         super(protocol);
 
-        this.parserHandlers.put("minecraft:dimension", wrapper -> {
+        this.parserHandlers.put("minecraft:dimension", wrapper -> wrapper.write(Type.VAR_INT, 0)); // Single word
-            wrapper.write(Type.VAR_INT, 0); // Single word
-        });
     }
 
     @Override

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_13to1_13_1/packets/WorldPackets1_13_1.java

@@ -70,26 +70,17 @@ public class WorldPackets1_13_1 {
                     } else if (id == 2001) { // Block break + block break sound
                         wrapper.set(Type.INT, 1, protocol.getMappingData().getNewBlockStateId(data));
                     } else if (id == 2000) { // Smoke
-                        switch (data) {
+                        switch (data) { // Down
-                            case 0: // Down
+                            case 0, 1 -> { // Up
-                            case 1: // Up
                                 Position pos = wrapper.get(Type.POSITION1_8, 0);
                                 BlockFace relative = data == 0 ? BlockFace.BOTTOM : BlockFace.TOP;
                                 wrapper.set(Type.POSITION1_8, 0, pos.getRelative(relative)); // Y Offset
                                 wrapper.set(Type.INT, 1, 4); // Self
-                                break;
+                            }
-                            case 2: // North
+                            case 2 -> wrapper.set(Type.INT, 1, 1); // North
-                                wrapper.set(Type.INT, 1, 1); // North
+                            case 3 -> wrapper.set(Type.INT, 1, 7); // South
-                                break;
+                            case 4 -> wrapper.set(Type.INT, 1, 3); // West
-                            case 3: // South
+                            case 5 -> wrapper.set(Type.INT, 1, 5); // East
-                                wrapper.set(Type.INT, 1, 7); // South
-                                break;
-                            case 4: // West
-                                wrapper.set(Type.INT, 1, 3); // West
-                                break;
-                            case 5: // East
-                                wrapper.set(Type.INT, 1, 5); // East
-                                break;
                         }
                     }
                 });

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_15_2to1_16/chat/TranslatableRewriter1_16.java

@@ -113,7 +113,9 @@ public class TranslatableRewriter1_16 extends TranslatableRewriter<ClientboundPa
 
         private final String colorName;
         private final int rgb;
-        private final int r, g, b;
+        private final int r;
+        private final int g;
+        private final int b;
 
         ChatColor(String colorName, int rgb) {
             this.colorName = colorName;

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_15_2to1_16/packets/BlockItemPackets1_16.java

@@ -162,11 +162,10 @@ public class BlockItemPackets1_16 extends BackwardsItemRewriter<ClientboundPacke
 
             CompoundTag heightMaps = chunk.getHeightMap();
             for (Tag heightMapTag : heightMaps.values()) {
-                if (!(heightMapTag instanceof LongArrayTag)) {
+                if (!(heightMapTag instanceof LongArrayTag heightMap)) {
                     continue;
                 }
 
-                LongArrayTag heightMap = (LongArrayTag) heightMapTag;
                 int[] heightMapData = new int[256];
                 CompactArrayUtil.iterateCompactArrayWithPadding(9, heightMapData.length, heightMap.getValue(), (i, v) -> heightMapData[i] = v);
                 heightMap.setValue(CompactArrayUtil.createCompactArray(9, heightMapData.length, i -> heightMapData[i]));
@@ -188,12 +187,7 @@ public class BlockItemPackets1_16 extends BackwardsItemRewriter<ClientboundPacke
                     for (int i = 0; i < 1024; i++) {
                         int biome = chunk.getBiomeData()[i];
                         switch (biome) {
-                            case 170: // new nether biomes
+                            case 170, 171, 172, 173 -> chunk.getBiomeData()[i] = 8;
-                            case 171:
-                            case 172:
-                            case 173:
-                                chunk.getBiomeData()[i] = 8;
-                                break;
                         }
                     }
                 }
@@ -266,19 +260,16 @@ public class BlockItemPackets1_16 extends BackwardsItemRewriter<ClientboundPacke
             UUID targetUuid = UUIDUtil.fromIntArray((int[]) targetUuidTag.getValue());
             tag.putString("target_uuid", targetUuid.toString());
         } else if (id.equals("minecraft:skull")) {
-            Tag skullOwnerTag = tag.remove("SkullOwner");
+            if (!(tag.remove("SkullOwner") instanceof CompoundTag skullOwnerTag)) return;
-            if (!(skullOwnerTag instanceof CompoundTag)) return;
 
-            CompoundTag skullOwnerCompoundTag = (CompoundTag) skullOwnerTag;
+            if (skullOwnerTag.remove("Id") instanceof IntArrayTag ownerUuidTag) {
-            Tag ownerUuidTag = skullOwnerCompoundTag.remove("Id");
+                UUID ownerUuid = UUIDUtil.fromIntArray(ownerUuidTag.getValue());
-            if (ownerUuidTag instanceof IntArrayTag) {
+                skullOwnerTag.putString("Id", ownerUuid.toString());
-                UUID ownerUuid = UUIDUtil.fromIntArray((int[]) ownerUuidTag.getValue());
-                skullOwnerCompoundTag.putString("Id", ownerUuid.toString());
             }
 
             // SkullOwner -> Owner
             CompoundTag ownerTag = new CompoundTag();
-            for (Map.Entry<String, Tag> entry : skullOwnerCompoundTag) {
+            for (Map.Entry<String, Tag> entry : skullOwnerTag) {
                 ownerTag.put(entry.getKey(), entry.getValue());
             }
             tag.put("Owner", ownerTag);
@@ -349,13 +340,6 @@ public class BlockItemPackets1_16 extends BackwardsItemRewriter<ClientboundPacke
         return item;
     }
 
-    private static final class EquipmentData {
+    private record EquipmentData(int slot, Item item) {
-        private final int slot;
-        private final Item item;
-
-        private EquipmentData(final int slot, final Item item) {
-            this.slot = slot;
-            this.item = item;
-        }
     }
 }

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_15_2to1_16/packets/EntityPackets1_16.java

@@ -44,19 +44,15 @@ import com.viaversion.viaversion.util.Key;
 
 public class EntityPackets1_16 extends EntityRewriter<ClientboundPackets1_16, Protocol1_15_2To1_16> {
 
-    private final ValueTransformer<String, Integer> dimensionTransformer = new ValueTransformer<String, Integer>(Type.STRING, Type.INT) {
+    private final ValueTransformer<String, Integer> dimensionTransformer = new ValueTransformer<>(Type.STRING, Type.INT) {
         @Override
         public Integer transform(PacketWrapper wrapper, String input) {
             input = Key.namespaced(input);
-            switch (input) {
+            return switch (input) {
-                case "minecraft:the_nether":
+                case "minecraft:the_nether" -> -1;
-                    return -1;
+                case "minecraft:the_end" -> 1;
-                default:
+                default -> 0; // Including overworld
-                case "minecraft:overworld":
+            };
-                    return 0;
-                case "minecraft:the_end":
-                    return 1;
-            }
         }
     };
 

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_16_1to1_16_2/Protocol1_16_1To1_16_2.java

@@ -107,7 +107,7 @@ public class Protocol1_16_1To1_16_2 extends BackwardsProtocol<ClientboundPackets
         new StatisticsRewriter<>(this).register(ClientboundPackets1_16_2.STATISTICS);
     }
 
-    private static void sendSeenRecipePacket(int recipeType, PacketWrapper wrapper) throws Exception {
+    private static void sendSeenRecipePacket(int recipeType, PacketWrapper wrapper) {
         boolean open = wrapper.read(Type.BOOLEAN);
         boolean filter = wrapper.read(Type.BOOLEAN);
 

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_16_1to1_16_2/data/CommandRewriter1_16_2.java

@@ -28,9 +28,7 @@ public class CommandRewriter1_16_2 extends CommandRewriter<ClientboundPackets1_1
     public CommandRewriter1_16_2(Protocol1_16_1To1_16_2 protocol) {
         super(protocol);
 
-        this.parserHandlers.put("minecraft:angle", wrapper -> {
+        this.parserHandlers.put("minecraft:angle", wrapper -> wrapper.write(Type.VAR_INT, 0)); // Single word
-            wrapper.write(Type.VAR_INT, 0); // Single word
-        });
     }
 
     @Override

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_16_4to1_17/packets/BlockItemPackets1_17.java

@@ -244,7 +244,7 @@ public final class BlockItemPackets1_17 extends BackwardsItemRewriter<Clientboun
             }
 
             private void writeLightArrays(PacketWrapper wrapper, BitSet bitMask, int cutBitMask,
-                                          int startFromSection, int sectionHeight) throws Exception {
+                                          int startFromSection, int sectionHeight) {
                 wrapper.read(Type.VAR_INT); // Length - throw it away
 
                 List<byte[]> light = new ArrayList<>();

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_16_4to1_17/packets/EntityPackets1_17.java

@@ -120,10 +120,7 @@ public final class EntityPackets1_17 extends EntityRewriter<ClientboundPackets1_
                 map(Type.FLOAT);
                 map(Type.BYTE);
                 map(Type.VAR_INT);
-                handler(wrapper -> {
+                read(Type.BOOLEAN); // Dismount vehicle ¯\_(ツ)_/¯
-                    // Dismount vehicle ¯\_(ツ)_/¯
-                    wrapper.read(Type.BOOLEAN);
-                });
             }
         });
 
@@ -131,9 +128,7 @@ public final class EntityPackets1_17 extends EntityRewriter<ClientboundPackets1_
             @Override
             public void register() {
                 map(Type.VAR_INT); // Entity id
-                handler(wrapper -> {
+                handler(wrapper -> wrapper.write(Type.INT, wrapper.read(Type.VAR_INT))); // Collection length
-                    wrapper.write(Type.INT, wrapper.read(Type.VAR_INT)); // Collection length
-                });
             }
         });
 

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_18_2to1_19/Protocol1_18_2To1_19.java

@@ -56,6 +56,7 @@ import com.viaversion.viaversion.rewriter.ComponentRewriter;
 import com.viaversion.viaversion.rewriter.StatisticsRewriter;
 import com.viaversion.viaversion.rewriter.TagRewriter;
 import com.viaversion.viaversion.util.Pair;
+import java.security.SignatureException;
 import java.time.Instant;
 import java.util.List;
 import java.util.UUID;
@@ -254,7 +255,12 @@ public final class Protocol1_18_2To1_19 extends BackwardsProtocol<ClientboundPac
                             final List<Pair<String, String>> arguments = argumentsProvider.getSignableArguments(command);
                             wrapper.write(Type.VAR_INT, arguments.size());
                             for (final Pair<String, String> argument : arguments) {
-                                final byte[] signature = chatSession.signChatMessage(metadata, new DecoratableMessage(argument.value()));
+                                final byte[] signature;
+                                try {
+                                    signature = chatSession.signChatMessage(metadata, new DecoratableMessage(argument.value()));
+                                } catch (final SignatureException e) {
+                                    throw new RuntimeException(e);
+                                }
 
                                 wrapper.write(Type.STRING, argument.key());
                                 wrapper.write(Type.BYTE_ARRAY_PRIMITIVE, signature);
@@ -266,7 +272,12 @@ public final class Protocol1_18_2To1_19 extends BackwardsProtocol<ClientboundPac
                         if (chatSession != null) {
                             final MessageMetadata metadata = new MessageMetadata(sender, timestamp, salt);
                             final DecoratableMessage decoratableMessage = new DecoratableMessage(message);
-                            final byte[] signature = chatSession.signChatMessage(metadata, decoratableMessage);
+                            final byte[] signature;
+                            try {
+                                signature = chatSession.signChatMessage(metadata, decoratableMessage);
+                            } catch (final SignatureException e) {
+                                throw new RuntimeException(e);
+                            }
 
                             wrapper.write(Type.BYTE_ARRAY_PRIMITIVE, signature); // Signature
                         } else {
@@ -330,10 +341,15 @@ public final class Protocol1_18_2To1_19 extends BackwardsProtocol<ClientboundPac
                     wrapper.write(Type.BOOLEAN, chatSession == null); // Is nonce
                     if (chatSession != null) {
                         final long salt = ThreadLocalRandom.current().nextLong();
-                        final byte[] signature = chatSession.sign(signer -> {
+                        final byte[] signature;
-                            signer.accept(wrapper.user().remove(NonceStorage.class).nonce());
+                        try {
-                            signer.accept(Longs.toByteArray(salt));
+                            signature = chatSession.sign(signer -> {
-                        });
+                                signer.accept(wrapper.user().remove(NonceStorage.class).nonce());
+                                signer.accept(Longs.toByteArray(salt));
+                            });
+                        } catch (final SignatureException e) {
+                            throw new RuntimeException(e);
+                        }
                         wrapper.write(Type.LONG, salt); // Salt
                         wrapper.write(Type.BYTE_ARRAY_PRIMITIVE, signature); // Signature
                     } else {

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_18_2to1_19/storage/NonceStorage.java

@@ -20,15 +20,6 @@ package com.viaversion.viabackwards.protocol.protocol1_18_2to1_19.storage;
 import com.viaversion.viaversion.api.connection.StorableObject;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
-public final class NonceStorage implements StorableObject {
+public record NonceStorage(byte @Nullable [] nonce) implements StorableObject {
 
-    private final byte[] nonce;
-
-    public NonceStorage(final byte @Nullable [] nonce) {
-        this.nonce = nonce;
-    }
-
-    public byte @Nullable [] nonce() {
-        return nonce;
-    }
 }

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_18_2to1_19/storage/StoredPainting.java

@@ -52,19 +52,13 @@ public final class StoredPainting implements StorableObject {
     }
 
     private byte to2dDirection(int direction) {
-        switch (direction) {
+        return switch (direction) {
-            case 0:
+            case 0, 1 -> -1; // No worky
-            case 1:
+            case 2 -> 2;
-                return -1; // No worky
+            case 3 -> 0;
-            case 2:
+            case 4 -> 1;
-                return 2;
+            case 5 -> 3;
-            case 3:
+            default -> throw new IllegalArgumentException("Invalid direction: " + direction);
-                return 0;
+        };
-            case 4:
-                return 1;
-            case 5:
-                return 3;
-        }
-        throw new IllegalArgumentException("Invalid direction: " + direction);
     }
 }

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_19_1to1_19_3/Protocol1_19_1To1_19_3.java

@@ -60,6 +60,7 @@ import com.viaversion.viaversion.rewriter.TagRewriter;
 import com.viaversion.viaversion.util.CipherUtil;
 import com.viaversion.viaversion.util.ComponentUtil;
 import com.viaversion.viaversion.util.Pair;
+import java.security.SignatureException;
 import java.util.BitSet;
 import java.util.List;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -231,7 +232,12 @@ public final class Protocol1_19_1To1_19_3 extends BackwardsProtocol<ClientboundP
                         final long salt = wrapper.get(Type.LONG, 1);
 
                         final MessageMetadata metadata = new MessageMetadata(null, timestamp, salt);
-                        final byte[] signature = chatSession.signChatMessage(metadata, message, new PlayerMessageSignature[0]);
+                        final byte[] signature;
+                        try {
+                            signature = chatSession.signChatMessage(metadata, message, new PlayerMessageSignature[0]);
+                        } catch (final SignatureException e) {
+                            throw new RuntimeException(e);
+                        }
 
                         wrapper.write(Protocol1_19_1To1_19_3.OPTIONAL_SIGNATURE_BYTES_TYPE, signature); // Signature
                     } else {
@@ -271,7 +277,12 @@ public final class Protocol1_19_1To1_19_3 extends BackwardsProtocol<ClientboundP
                         final List<Pair<String, String>> arguments = argumentsProvider.getSignableArguments(command);
                         wrapper.write(Type.VAR_INT, arguments.size());
                         for (final Pair<String, String> argument : arguments) {
-                            final byte[] signature = chatSession.signChatMessage(metadata, argument.value(), new PlayerMessageSignature[0]);
+                            final byte[] signature;
+                            try {
+                                signature = chatSession.signChatMessage(metadata, argument.value(), new PlayerMessageSignature[0]);
+                            } catch (final SignatureException e) {
+                                throw new RuntimeException(e);
+                            }
 
                             wrapper.write(Type.STRING, argument.key());
                             wrapper.write(Protocol1_19_1To1_19_3.SIGNATURE_BYTES_TYPE, signature);
@@ -350,7 +361,7 @@ public final class Protocol1_19_1To1_19_3 extends BackwardsProtocol<ClientboundP
         cancelServerbound(ServerboundPackets1_19_1.CHAT_ACK);
     }
 
-    private @Nullable String rewriteSound(final PacketWrapper wrapper) throws Exception {
+    private @Nullable String rewriteSound(final PacketWrapper wrapper) {
         final Holder<SoundEvent> holder = wrapper.read(Type.SOUND_EVENT);
         if (holder.hasId()) {
             final int mappedId = MAPPINGS.getSoundMappings().getNewId(holder.id());

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_19_1to1_19_3/packets/EntityPackets1_19_3.java

@@ -180,15 +180,9 @@ public final class EntityPackets1_19_3 extends EntityRewriter<ClientboundPackets
                         continue;
                     }
                     switch (action) {
-                        case UPDATE_GAMEMODE:
+                        case UPDATE_GAMEMODE -> gamemode = wrapper.read(Type.VAR_INT);
-                            gamemode = wrapper.read(Type.VAR_INT);
+                        case UPDATE_LATENCY -> latency = wrapper.read(Type.VAR_INT);
-                            break;
+                        case UPDATE_DISPLAYNAME -> displayName = wrapper.read(Type.OPTIONAL_COMPONENT);
-                        case UPDATE_LATENCY:
-                            latency = wrapper.read(Type.VAR_INT);
-                            break;
-                        case UPDATE_DISPLAYNAME:
-                            displayName = wrapper.read(Type.OPTIONAL_COMPONENT);
-                            break;
                     }
                 }
 
@@ -213,7 +207,7 @@ public final class EntityPackets1_19_3 extends EntityRewriter<ClientboundPackets
         });
     }
 
-    private void sendPlayerProfileUpdate(final UserConnection connection, final int action, final PlayerProfileUpdate[] updates) throws Exception {
+    private void sendPlayerProfileUpdate(final UserConnection connection, final int action, final PlayerProfileUpdate[] updates) {
         final PacketWrapper playerInfoPacket = PacketWrapper.create(ClientboundPackets1_19_1.PLAYER_INFO, connection);
         playerInfoPacket.write(Type.VAR_INT, action);
         playerInfoPacket.write(Type.VAR_INT, updates.length);
@@ -274,33 +268,6 @@ public final class EntityPackets1_19_3 extends EntityRewriter<ClientboundPackets
         return EntityTypes1_19_3.getTypeFromId(typeId);
     }
 
-    private static final class PlayerProfileUpdate {
+    private record PlayerProfileUpdate(UUID uuid, int gamemode, int latency, @Nullable JsonElement displayName) {
-        private final UUID uuid;
-        private final int gamemode;
-        private final int latency;
-        private final JsonElement displayName;
-
-        private PlayerProfileUpdate(final UUID uuid, final int gamemode, final int latency, @Nullable final JsonElement displayName) {
-            this.uuid = uuid;
-            this.gamemode = gamemode;
-            this.latency = latency;
-            this.displayName = displayName;
-        }
-
-        public UUID uuid() {
-            return uuid;
-        }
-
-        public int gamemode() {
-            return gamemode;
-        }
-
-        public int latency() {
-            return latency;
-        }
-
-        public @Nullable JsonElement displayName() {
-            return displayName;
-        }
     }
 }

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_19_1to1_19_3/storage/NonceStorage.java

@@ -20,15 +20,5 @@ package com.viaversion.viabackwards.protocol.protocol1_19_1to1_19_3.storage;
 import com.viaversion.viaversion.api.connection.StorableObject;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
-public final class NonceStorage implements StorableObject {
+public record NonceStorage(byte @Nullable [] nonce) implements StorableObject {
-
-    private final byte[] nonce;
-
-    public NonceStorage(final byte @Nullable [] nonce) {
-        this.nonce = nonce;
-    }
-
-    public byte @Nullable [] nonce() {
-        return nonce;
-    }
 }

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_19_3to1_19_4/Protocol1_19_3To1_19_4.java

@@ -74,9 +74,9 @@ public final class Protocol1_19_3To1_19_4 extends BackwardsProtocol<ClientboundP
         translatableRewriter.registerComponentPacket(ClientboundPackets1_19_4.DISGUISED_CHAT);
         translatableRewriter.registerPing();
 
-        new CommandRewriter<ClientboundPackets1_19_4>(this) {
+        new CommandRewriter<>(this) {
             @Override
-            public void handleArgument(final PacketWrapper wrapper, final String argumentType) throws Exception {
+            public void handleArgument(final PacketWrapper wrapper, final String argumentType) {
                 switch (argumentType) {
                     case "minecraft:heightmap":
                         wrapper.write(Type.VAR_INT, 0);

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_19_3to1_19_4/packets/BlockItemPackets1_19_4.java

@@ -75,9 +75,9 @@ public final class BlockItemPackets1_19_4 extends BackwardsItemRewriter<Clientbo
         registerWindowPropertyEnchantmentHandler(ClientboundPackets1_19_4.WINDOW_PROPERTY);
         registerSpawnParticle1_19(ClientboundPackets1_19_4.SPAWN_PARTICLE);
 
-        final RecipeRewriter1_19_3<ClientboundPackets1_19_4> recipeRewriter = new RecipeRewriter1_19_3<ClientboundPackets1_19_4>(protocol) {
+        final RecipeRewriter1_19_3<ClientboundPackets1_19_4> recipeRewriter = new RecipeRewriter1_19_3<>(protocol) {
             @Override
-            public void handleCraftingShaped(final PacketWrapper wrapper) throws Exception {
+            public void handleCraftingShaped(final PacketWrapper wrapper) {
                 final int ingredients = wrapper.passthrough(Type.VAR_INT) * wrapper.passthrough(Type.VAR_INT);
                 wrapper.passthrough(Type.STRING); // Group
                 wrapper.passthrough(Type.VAR_INT); // Crafting book category

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_19_4to1_20/packets/BlockItemPackets1_20.java

@@ -198,8 +198,7 @@ public final class BlockItemPackets1_20 extends BackwardsItemRewriter<Clientboun
         final Tag frontText = tag.remove("front_text");
         tag.remove("back_text");
 
-        if (frontText instanceof CompoundTag) {
+        if (frontText instanceof CompoundTag frontTextTag) {
-            final CompoundTag frontTextTag = (CompoundTag) frontText;
             writeMessages(frontTextTag, tag, false);
             writeMessages(frontTextTag, tag, true);
 

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_19_4to1_20/storage/BackSignEditStorage.java

@@ -20,15 +20,5 @@ package com.viaversion.viabackwards.protocol.protocol1_19_4to1_20.storage;
 import com.viaversion.viaversion.api.connection.StorableObject;
 import com.viaversion.viaversion.api.minecraft.Position;
 
-public final class BackSignEditStorage implements StorableObject {
+public record BackSignEditStorage(Position position) implements StorableObject {
-
-    private final Position position;
-
-    public BackSignEditStorage(final Position position) {
-        this.position = position;
-    }
-
-    public Position position() {
-        return position;
-    }
 }

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_19to1_19_1/Protocol1_19To1_19_1.java

@@ -56,6 +56,7 @@ import com.viaversion.viaversion.util.CipherUtil;
 import com.viaversion.viaversion.util.ComponentUtil;
 import com.viaversion.viaversion.util.Pair;
 import com.viaversion.viaversion.util.TagUtil;
+import java.security.SignatureException;
 import java.util.List;
 import java.util.UUID;
 import org.checkerframework.checker.nullness.qual.Nullable;
@@ -205,7 +206,12 @@ public final class Protocol1_19To1_19_1 extends BackwardsProtocol<ClientboundPac
 
                         final MessageMetadata metadata = new MessageMetadata(sender, timestamp, salt);
                         final DecoratableMessage decoratableMessage = new DecoratableMessage(message);
-                        final byte[] signature = chatSession.signChatMessage(metadata, decoratableMessage, messagesStorage.lastSignatures());
+                        final byte[] signature;
+                        try {
+                            signature = chatSession.signChatMessage(metadata, decoratableMessage, messagesStorage.lastSignatures());
+                        } catch (final SignatureException e) {
+                            throw new RuntimeException(e);
+                        }
 
                         wrapper.write(Type.BYTE_ARRAY_PRIMITIVE, signature); // Signature
                         wrapper.write(Type.BOOLEAN, decoratableMessage.isDecorated()); // Signed preview
@@ -249,7 +255,12 @@ public final class Protocol1_19To1_19_1 extends BackwardsProtocol<ClientboundPac
                         final List<Pair<String, String>> arguments = argumentsProvider.getSignableArguments(command);
                         wrapper.write(Type.VAR_INT, arguments.size());
                         for (final Pair<String, String> argument : arguments) {
-                            final byte[] signature = chatSession.signChatMessage(metadata, new DecoratableMessage(argument.value()), messagesStorage.lastSignatures());
+                            final byte[] signature;
+                            try {
+                                signature = chatSession.signChatMessage(metadata, new DecoratableMessage(argument.value()), messagesStorage.lastSignatures());
+                            } catch (final SignatureException e) {
+                                throw new RuntimeException(e);
+                            }
 
                             wrapper.write(Type.STRING, argument.key());
                             wrapper.write(Type.BYTE_ARRAY_PRIMITIVE, signature);

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_19to1_19_1/storage/NonceStorage.java

@@ -18,17 +18,6 @@
 package com.viaversion.viabackwards.protocol.protocol1_19to1_19_1.storage;
 
 import com.viaversion.viaversion.api.connection.StorableObject;
-import org.checkerframework.checker.nullness.qual.Nullable;
 
-public final class NonceStorage implements StorableObject {
+public record NonceStorage(byte[] nonce) implements StorableObject {
-
-    private final byte[] nonce;
-
-    public NonceStorage(final byte @Nullable [] nonce) {
-        this.nonce = nonce;
-    }
-
-    public byte @Nullable [] nonce() {
-        return nonce;
-    }
 }

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_20_2to1_20_3/Protocol1_20_2To1_20_3.java

@@ -83,9 +83,9 @@ public final class Protocol1_20_2To1_20_3 extends BackwardsProtocol<ClientboundP
         soundRewriter.registerStopSound(ClientboundPackets1_20_3.STOP_SOUND);
 
         new StatisticsRewriter<>(this).register(ClientboundPackets1_20_3.STATISTICS);
-        new CommandRewriter1_19_4<ClientboundPacket1_20_3>(this) {
+        new CommandRewriter1_19_4<>(this) {
             @Override
-            public void handleArgument(final PacketWrapper wrapper, final String argumentType) throws Exception {
+            public void handleArgument(final PacketWrapper wrapper, final String argumentType) {
                 if (argumentType.equals("minecraft:style")) {
                     wrapper.write(Type.VAR_INT, 1); // Phrase
                 } else {
@@ -364,13 +364,13 @@ public final class Protocol1_20_2To1_20_3 extends BackwardsProtocol<ClientboundP
         };
     }
 
-    private void convertComponent(final PacketWrapper wrapper) throws Exception {
+    private void convertComponent(final PacketWrapper wrapper) {
         final Tag tag = wrapper.read(Type.TAG);
         translatableRewriter.processTag(wrapper.user(), tag);
         wrapper.write(Type.COMPONENT, ComponentUtil.tagToJson(tag));
     }
 
-    private void convertOptionalComponent(final PacketWrapper wrapper) throws Exception {
+    private void convertOptionalComponent(final PacketWrapper wrapper) {
         final Tag tag = wrapper.read(Type.OPTIONAL_TAG);
         translatableRewriter.processTag(wrapper.user(), tag);
         wrapper.write(Type.OPTIONAL_COMPONENT, ComponentUtil.tagToJson(tag));

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_20_2to1_20_3/rewriter/BlockItemPacketRewriter1_20_3.java

@@ -90,9 +90,9 @@ public final class BlockItemPacketRewriter1_20_3 extends BackwardsItemRewriter<C
             }
         });
 
-        new RecipeRewriter1_20_3<ClientboundPacket1_20_3>(protocol) {
+        new RecipeRewriter1_20_3<>(protocol) {
             @Override
-            public void handleCraftingShaped(final PacketWrapper wrapper) throws Exception {
+            public void handleCraftingShaped(final PacketWrapper wrapper) {
                 // Move width and height up
                 final String group = wrapper.read(Type.STRING);
                 final int craftingBookCategory = wrapper.read(Type.VAR_INT);

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_20_2to1_20_3/storage/ResourcepackIDStorage.java

@@ -20,16 +20,7 @@ package com.viaversion.viabackwards.protocol.protocol1_20_2to1_20_3.storage;
 import com.viaversion.viaversion.api.connection.StorableObject;
 import java.util.UUID;
 
-public final class ResourcepackIDStorage implements StorableObject {
+public record ResourcepackIDStorage(UUID uuid) implements StorableObject {
-    private final UUID uuid;
-
-    public ResourcepackIDStorage(final UUID uuid) {
-        this.uuid = uuid;
-    }
-
-    public UUID uuid() {
-        return uuid;
-    }
 
     @Override
     public boolean clearOnServerSwitch() {

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_20_3to1_20_5/Protocol1_20_3To1_20_5.java

@@ -151,9 +151,9 @@ public final class Protocol1_20_3To1_20_5 extends BackwardsProtocol<ClientboundP
             response.sendToServer(Protocol1_20_3To1_20_5.class);
         });
 
-        new CommandRewriter1_19_4<ClientboundPacket1_20_5>(this) {
+        new CommandRewriter1_19_4<>(this) {
             @Override
-            public void handleArgument(final PacketWrapper wrapper, final String argumentType) throws Exception {
+            public void handleArgument(final PacketWrapper wrapper, final String argumentType) {
                 if (argumentType.equals("minecraft:loot_table")
                     || argumentType.equals("minecraft:loot_predicate")
                     || argumentType.equals("minecraft:loot_modifier")) {
@@ -182,7 +182,7 @@ public final class Protocol1_20_3To1_20_5 extends BackwardsProtocol<ClientboundP
         cancelClientbound(ClientboundPackets1_20_5.DEBUG_SAMPLE);
     }
 
-    private void handleStoreCookie(final PacketWrapper wrapper) throws Exception {
+    private void handleStoreCookie(final PacketWrapper wrapper) {
         wrapper.cancel();
 
         final String resourceLocation = wrapper.read(Type.STRING);
@@ -194,7 +194,7 @@ public final class Protocol1_20_3To1_20_5 extends BackwardsProtocol<ClientboundP
         wrapper.user().get(CookieStorage.class).cookies().put(resourceLocation, data);
     }
 
-    private void handleCookieRequest(final PacketWrapper wrapper, final ServerboundPacketType responseType) throws Exception {
+    private void handleCookieRequest(final PacketWrapper wrapper, final ServerboundPacketType responseType) {
         wrapper.cancel();
 
         final String resourceLocation = wrapper.read(Type.STRING);
@@ -205,7 +205,7 @@ public final class Protocol1_20_3To1_20_5 extends BackwardsProtocol<ClientboundP
         responsePacket.sendToServer(Protocol1_20_3To1_20_5.class);
     }
 
-    private void handleTransfer(final PacketWrapper wrapper) throws Exception {
+    private void handleTransfer(final PacketWrapper wrapper) {
         wrapper.cancel();
 
         final String host = wrapper.read(Type.STRING);

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_20_3to1_20_5/rewriter/BlockItemPacketRewriter1_20_5.java

@@ -294,40 +294,24 @@ public final class BlockItemPacketRewriter1_20_5 extends BackwardsStructuredItem
     }
 
     private static int colorId(final String color) {
-        switch (color) {
+        return switch (color) {
-            case "orange":
+            case "orange" -> 1;
-                return 1;
+            case "magenta" -> 2;
-            case "magenta":
+            case "light_blue" -> 3;
-                return 2;
+            case "yellow" -> 4;
-            case "light_blue":
+            case "lime" -> 5;
-                return 3;
+            case "pink" -> 6;
-            case "yellow":
+            case "gray" -> 7;
-                return 4;
+            case "light_gray" -> 8;
-            case "lime":
+            case "cyan" -> 9;
-                return 5;
+            case "purple" -> 10;
-            case "pink":
+            case "blue" -> 11;
-                return 6;
+            case "brown" -> 12;
-            case "gray":
+            case "green" -> 13;
-                return 7;
+            case "red" -> 14;
-            case "light_gray":
+            case "black" -> 15;
-                return 8;
+            default -> 0;
-            case "cyan":
+        };
-                return 9;
-            case "purple":
-                return 10;
-            case "blue":
-                return 11;
-            case "brown":
-                return 12;
-            case "green":
-                return 13;
-            case "red":
-                return 14;
-            case "black":
-                return 15;
-            default:
-                return 0;
-        }
     }
 
     @Override

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_20to1_20_2/Protocol1_20To1_20_2.java

@@ -35,6 +35,7 @@ import com.viaversion.viaversion.api.rewriter.ItemRewriter;
 import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.data.entity.EntityTrackerBase;
 import com.viaversion.viaversion.exception.CancelException;
+import com.viaversion.viaversion.exception.InformativeException;
 import com.viaversion.viaversion.libs.opennbt.tag.builtin.CompoundTag;
 import com.viaversion.viaversion.protocols.base.ClientboundLoginPackets;
 import com.viaversion.viaversion.protocols.base.ServerboundLoginPackets;
@@ -170,7 +171,7 @@ public final class Protocol1_20To1_20_2 extends BackwardsProtocol<ClientboundPac
     }
 
     @Override
-    public void transform(final Direction direction, final State state, final PacketWrapper wrapper) throws Exception {
+    public void transform(final Direction direction, final State state, final PacketWrapper wrapper) throws InformativeException, CancelException {
         final ConfigurationPacketStorage configurationPacketStorage = wrapper.user().get(ConfigurationPacketStorage.class);
         if (configurationPacketStorage == null || configurationPacketStorage.isFinished()) {
             super.transform(direction, state, wrapper);

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_20to1_20_2/rewriter/BlockItemPacketRewriter1_20_2.java

@@ -286,9 +286,9 @@ public final class BlockItemPacketRewriter1_20_2 extends BackwardsItemRewriter<C
             }
         });
 
-        new RecipeRewriter1_20_2<ClientboundPackets1_20_2>(protocol) {
+        new RecipeRewriter1_20_2<>(protocol) {
             @Override
-            public void handleCraftingShapeless(final PacketWrapper wrapper) throws Exception {
+            public void handleCraftingShapeless(final PacketWrapper wrapper) {
                 wrapper.passthrough(Type.STRING); // Group
                 wrapper.passthrough(Type.VAR_INT); // Crafting book category
                 handleIngredients(wrapper);
@@ -299,7 +299,7 @@ public final class BlockItemPacketRewriter1_20_2 extends BackwardsItemRewriter<C
             }
 
             @Override
-            public void handleSmelting(final PacketWrapper wrapper) throws Exception {
+            public void handleSmelting(final PacketWrapper wrapper) {
                 wrapper.passthrough(Type.STRING); // Group
                 wrapper.passthrough(Type.VAR_INT); // Crafting book category
                 handleIngredient(wrapper);
@@ -313,7 +313,7 @@ public final class BlockItemPacketRewriter1_20_2 extends BackwardsItemRewriter<C
             }
 
             @Override
-            public void handleCraftingShaped(final PacketWrapper wrapper) throws Exception {
+            public void handleCraftingShaped(final PacketWrapper wrapper) {
                 final int ingredients = wrapper.passthrough(Type.VAR_INT) * wrapper.passthrough(Type.VAR_INT);
                 wrapper.passthrough(Type.STRING); // Group
                 wrapper.passthrough(Type.VAR_INT); // Crafting book category
@@ -329,7 +329,7 @@ public final class BlockItemPacketRewriter1_20_2 extends BackwardsItemRewriter<C
             }
 
             @Override
-            public void handleStonecutting(final PacketWrapper wrapper) throws Exception {
+            public void handleStonecutting(final PacketWrapper wrapper) {
                 wrapper.passthrough(Type.STRING); // Group
                 handleIngredient(wrapper);
 
@@ -339,7 +339,7 @@ public final class BlockItemPacketRewriter1_20_2 extends BackwardsItemRewriter<C
             }
 
             @Override
-            public void handleSmithing(final PacketWrapper wrapper) throws Exception {
+            public void handleSmithing(final PacketWrapper wrapper) {
                 handleIngredient(wrapper); // Base
                 handleIngredient(wrapper); // Addition
 
@@ -349,7 +349,7 @@ public final class BlockItemPacketRewriter1_20_2 extends BackwardsItemRewriter<C
             }
 
             @Override
-            public void handleSmithingTransform(final PacketWrapper wrapper) throws Exception {
+            public void handleSmithingTransform(final PacketWrapper wrapper) {
                 handleIngredient(wrapper); // Template
                 handleIngredient(wrapper); // Base
                 handleIngredient(wrapper); // Additions
@@ -360,7 +360,7 @@ public final class BlockItemPacketRewriter1_20_2 extends BackwardsItemRewriter<C
             }
 
             @Override
-            protected void handleIngredient(final PacketWrapper wrapper) throws Exception {
+            protected void handleIngredient(final PacketWrapper wrapper) {
                 final Item[] items = wrapper.read(itemArrayType());
                 wrapper.write(Type.ITEM1_13_2_ARRAY, items);
                 for (final Item item : items) {

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_20to1_20_2/storage/ConfigurationPacketStorage.java

@@ -39,7 +39,7 @@ public final class ConfigurationPacketStorage implements StorableObject {
     private boolean finished;
     private QueuedPacket resourcePack;
 
-    public void setResourcePack(final PacketWrapper wrapper) throws Exception {
+    public void setResourcePack(final PacketWrapper wrapper) {
         resourcePack = toQueuedPacket(wrapper, ClientboundPackets1_19_4.RESOURCE_PACK);
     }
 
@@ -60,11 +60,11 @@ public final class ConfigurationPacketStorage implements StorableObject {
         this.enabledFeatures = enabledFeatures;
     }
 
-    public void addRawPacket(final PacketWrapper wrapper, final PacketType type) throws Exception {
+    public void addRawPacket(final PacketWrapper wrapper, final PacketType type) {
         rawPackets.add(toQueuedPacket(wrapper, type));
     }
 
-    private QueuedPacket toQueuedPacket(final PacketWrapper wrapper, final PacketType type) throws Exception {
+    private QueuedPacket toQueuedPacket(final PacketWrapper wrapper, final PacketType type) {
         Preconditions.checkArgument(!wrapper.isCancelled(), "Wrapper should be cancelled AFTER calling toQueuedPacket");
 
         // It's easier to just copy it to a byte array buffer than to manually read the data
@@ -75,7 +75,7 @@ public final class ConfigurationPacketStorage implements StorableObject {
         return new QueuedPacket(buf, type);
     }
 
-    public void sendQueuedPackets(final UserConnection connection) throws Exception {
+    public void sendQueuedPackets(final UserConnection connection) {
         // Send resource pack at the end
         if (resourcePack != null) {
             rawPackets.add(resourcePack);
@@ -100,21 +100,6 @@ public final class ConfigurationPacketStorage implements StorableObject {
         this.finished = finished;
     }
 
-    public static final class QueuedPacket {
+    public record QueuedPacket(ByteBuf buf, PacketType packetType) {
-        private final ByteBuf buf;
-        private final PacketType packetType;
-
-        public QueuedPacket(final ByteBuf buf, final PacketType packetType) {
-            this.buf = buf;
-            this.packetType = packetType;
-        }
-
-        public ByteBuf buf() {
-            return buf;
-        }
-
-        public PacketType packetType() {
-            return packetType;
-        }
     }
 }

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_9_1_2to1_9_3_4/chunks/BlockEntity.java

@@ -44,7 +44,7 @@ public class BlockEntity {
         TYPES.put("Sign", 9);
     }
 
-    public static void handle(List<CompoundTag> tags, UserConnection connection) throws Exception {
+    public static void handle(List<CompoundTag> tags, UserConnection connection) {
         for (CompoundTag tag : tags) {
             StringTag idTag = tag.getStringTag("id");
             if (idTag == null) {
@@ -71,7 +71,7 @@ public class BlockEntity {
         }
     }
 
-    private static void updateBlockEntity(Position pos, short id, CompoundTag tag, UserConnection connection) throws Exception {
+    private static void updateBlockEntity(Position pos, short id, CompoundTag tag, UserConnection connection) {
         PacketWrapper wrapper = PacketWrapper.create(ClientboundPackets1_9_3.BLOCK_ENTITY_DATA, null, connection);
         wrapper.write(Type.POSITION1_8, pos);
         wrapper.write(Type.UNSIGNED_BYTE, id);

common/src/main/java/com/viaversion/viabackwards/protocol/protocol1_9_4to1_10/Protocol1_9_4To1_10.java

@@ -37,8 +37,8 @@ import com.viaversion.viaversion.protocols.protocol1_9_3to1_9_1_2.ServerboundPac
 public class Protocol1_9_4To1_10 extends BackwardsProtocol<ClientboundPackets1_9_3, ClientboundPackets1_9_3, ServerboundPackets1_9_3, ServerboundPackets1_9_3> {
 
     public static final BackwardsMappings MAPPINGS = new BackwardsMappings("1.10", "1.9.4");
-    private static final ValueTransformer<Float, Short> TO_OLD_PITCH = new ValueTransformer<Float, Short>(Type.UNSIGNED_BYTE) {
+    private static final ValueTransformer<Float, Short> TO_OLD_PITCH = new ValueTransformer<>(Type.UNSIGNED_BYTE) {
-        public Short transform(PacketWrapper packetWrapper, Float inputValue) throws Exception {
+        public Short transform(PacketWrapper packetWrapper, Float inputValue) {
             return (short) Math.round(inputValue * 63.5F);
         }
     };

gradle.properties

@@ -1,4 +1,4 @@
-projectVersion=4.10.3-SNAPSHOT
+projectVersion=5.0.0-SNAPSHOT
 
 # Smile emoji
 mcVersions=1.20.6,1.20.5,1.20.4, 1.20.3, 1.20.2, 1.20.1, 1.20, 1.19.4, 1.19.3, 1.19.2, 1.19.1, 1.19, 1.18.2, 1.18.1, 1.18, 1.17.1, 1.17, 1.16.5, 1.16.4, 1.16.3, 1.16.2, 1.16.1, 1.16, 1.15.2, 1.15.1, 1.15, 1.14.4, 1.14.3, 1.14.2, 1.14.1, 1.14, 1.13.2, 1.13.1, 1.13, 1.12.2, 1.12.1, 1.12, 1.11.2, 1.11.1, 1.11, 1.10.2, 1.10.1, 1.10

gradle/libs.versions.toml

@@ -3,7 +3,7 @@ metadata.format.version = "1.1"
 [versions]
 
 # ViaVersion
-viaver = "4.10.2-SNAPSHOT"
+viaver = "5.0.0-SNAPSHOT"
 
 # Common provided
 netty = "4.0.20.Final"

settings.gradle.kts

@@ -4,6 +4,7 @@ rootProject.name = "viabackwards-parent"
 
 dependencyResolutionManagement {
     repositories {
+        mavenLocal()
         maven("https://repo.viaversion.com")
         maven("https://repo.papermc.io/repository/maven-public/")
         maven("https://oss.sonatype.org/content/repositories/snapshots/")