Separate ViaVersion methods to avoid ClassNotFoundExceptions

src/main/java/com/moulberry/axiom/packet/ManipulateEntityPacketListener.java

@@ -4,6 +4,7 @@ import com.moulberry.axiom.AxiomPaper;
 import com.moulberry.axiom.NbtSanitization;
 import com.moulberry.axiom.integration.Integration;
 import com.moulberry.axiom.integration.plotsquared.PlotSquaredIntegration;
+import com.moulberry.axiom.viaversion.UnknownVersionHelper;
 import com.moulberry.axiom.viaversion.ViaVersionHelper;
 import io.netty.buffer.Unpooled;
 import net.kyori.adventure.text.Component;
@@ -63,7 +64,7 @@ public class ManipulateEntityPacketListener implements PluginMessageListener {
                 pitch = friendlyByteBuf.readFloat();
             }
 
-            CompoundTag nbt = ViaVersionHelper.readTagUnknown(friendlyByteBuf, player);
+            CompoundTag nbt = UnknownVersionHelper.readTagUnknown(friendlyByteBuf, player);
 
             PassengerManipulation passengerManipulation = friendlyByteBuf.readEnum(PassengerManipulation.class);
             List<UUID> passengers = List.of();

src/main/java/com/moulberry/axiom/packet/SetBlockBufferPacketListener.java

@@ -8,8 +8,7 @@ import com.moulberry.axiom.buffer.BlockBuffer;
 import com.moulberry.axiom.buffer.CompressedBlockEntity;
 import com.moulberry.axiom.integration.Integration;
 import com.moulberry.axiom.integration.SectionPermissionChecker;
-import com.moulberry.axiom.integration.plotsquared.PlotSquaredIntegration;
+import com.moulberry.axiom.viaversion.UnknownVersionHelper;
-import com.moulberry.axiom.viaversion.ViaVersionHelper;
 import it.unimi.dsi.fastutil.longs.Long2ObjectMap;
 import it.unimi.dsi.fastutil.shorts.Short2ObjectMap;
 import net.minecraft.ChatFormatting;
@@ -78,7 +77,7 @@ public class SetBlockBufferPacketListener {
         boolean continuation = friendlyByteBuf.readBoolean();
 
         if (!continuation) {
-            ViaVersionHelper.skipTagUnknown(friendlyByteBuf, player.getBukkitEntity());
+            UnknownVersionHelper.skipTagUnknown(friendlyByteBuf, player.getBukkitEntity());
         }
 
         RateLimiter rateLimiter = this.plugin.getBlockBufferRateLimiter(player.getUUID());

src/main/java/com/moulberry/axiom/packet/SpawnEntityPacketListener.java

@@ -4,6 +4,7 @@ import com.moulberry.axiom.AxiomPaper;
 import com.moulberry.axiom.NbtSanitization;
 import com.moulberry.axiom.integration.Integration;
 import com.moulberry.axiom.integration.plotsquared.PlotSquaredIntegration;
+import com.moulberry.axiom.viaversion.UnknownVersionHelper;
 import com.moulberry.axiom.viaversion.ViaVersionHelper;
 import io.netty.buffer.Unpooled;
 import net.kyori.adventure.text.Component;
@@ -70,7 +71,7 @@ public class SpawnEntityPacketListener implements PluginMessageListener {
         List<SpawnEntry> entries = friendlyByteBuf.readCollection(FriendlyByteBuf.limitValue(ArrayList::new, 1000),
             buf -> new SpawnEntry(buf.readUUID(), buf.readDouble(), buf.readDouble(),
                 buf.readDouble(), buf.readFloat(), buf.readFloat(),
-                buf.readNullable(buffer -> buffer.readUUID()), ViaVersionHelper.readTagUnknown(buf, player)));
+                buf.readNullable(buffer -> buffer.readUUID()), UnknownVersionHelper.readTagUnknown(buf, player)));
 
         ServerLevel serverLevel = ((CraftWorld)player.getWorld()).getHandle();
 

src/main/java/com/moulberry/axiom/viaversion/UnknownVersionHelper.java

@@ -0,0 +1,34 @@
+package com.moulberry.axiom.viaversion;
+
+import com.moulberry.axiom.AxiomPaper;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.network.FriendlyByteBuf;
+import org.bukkit.entity.Player;
+
+public class UnknownVersionHelper {
+
+    public static void skipTagUnknown(FriendlyByteBuf friendlyByteBuf, Player player) {
+        if (AxiomPaper.PLUGIN.isMismatchedDataVersion(player.getUniqueId())) {
+            try {
+                ViaVersionHelper.skipTagViaVersion(friendlyByteBuf, player);
+            } catch (Exception e) {
+                throw new RuntimeException(e);
+            }
+        } else {
+            friendlyByteBuf.readNbt(); // Discard
+        }
+    }
+
+    public static CompoundTag readTagUnknown(FriendlyByteBuf friendlyByteBuf, Player player) {
+        if (AxiomPaper.PLUGIN.isMismatchedDataVersion(player.getUniqueId())) {
+            try {
+                return ViaVersionHelper.readTagViaVersion(friendlyByteBuf, player);
+            } catch (Exception e) {
+                throw new RuntimeException(e);
+            }
+        } else {
+            return friendlyByteBuf.readNbt();
+        }
+    }
+
+}

src/main/java/com/moulberry/axiom/viaversion/ViaVersionHelper.java

@@ -6,9 +6,7 @@ import com.viaversion.viaversion.api.Via;
 import com.viaversion.viaversion.api.data.MappingData;
 import com.viaversion.viaversion.api.data.Mappings;
 import com.viaversion.viaversion.api.protocol.ProtocolPathEntry;
-import com.viaversion.viaversion.api.protocol.version.ProtocolVersion;
 import com.viaversion.viaversion.api.type.Type;
-import io.netty.buffer.ByteBuf;
 import io.netty.buffer.Unpooled;
 import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
 import net.minecraft.SharedConstants;
@@ -65,7 +63,7 @@ public class ViaVersionHelper {
         return mapper;
     }
 
-    public static IdMapper<BlockState> applyMappings(IdMapper<BlockState> registry, Mappings mappings) {
+    private static IdMapper<BlockState> applyMappings(IdMapper<BlockState> registry, Mappings mappings) {
         IdMapper<BlockState> newBlockRegistry = new IdMapper<>();
 
         // Add empty mappings for non-existent blocks
@@ -95,38 +93,20 @@ public class ViaVersionHelper {
         return newBlockRegistry;
     }
 
-    private static final int UNNAMED_COMPOUND_TAG_CHANGE_VERSION = ProtocolVersion.v1_20_2.getVersion();
+    private static final int UNNAMED_COMPOUND_TAG_CHANGE_VERSION = 764; // 1.20.2
 
-    public static void skipTagUnknown(FriendlyByteBuf friendlyByteBuf, Player player) {
+    public static void skipTagViaVersion(FriendlyByteBuf friendlyByteBuf, Player player) throws Exception {
-        if (AxiomPaper.PLUGIN.isMismatchedDataVersion(player.getUniqueId())) {
+        skipTagViaVersion(friendlyByteBuf, Via.getAPI().getPlayerVersion(player.getUniqueId()));
-            int playerVersion = Via.getAPI().getPlayerVersion(player.getUniqueId());
-            try {
-                ViaVersionHelper.skipTagViaVersion(friendlyByteBuf, playerVersion);
-            } catch (Exception e) {
-                throw new RuntimeException(e);
-            }
-        } else {
-            friendlyByteBuf.readNbt(); // Discard
-        }
-    }
-
-    public static CompoundTag readTagUnknown(FriendlyByteBuf friendlyByteBuf, Player player) {
-        if (AxiomPaper.PLUGIN.isMismatchedDataVersion(player.getUniqueId())) {
-            int playerVersion = Via.getAPI().getPlayerVersion(player.getUniqueId());
-            try {
-                return ViaVersionHelper.readTagViaVersion(friendlyByteBuf, playerVersion);
-            } catch (Exception e) {
-                throw new RuntimeException(e);
-            }
-        } else {
-            return friendlyByteBuf.readNbt();
-        }
     }
 
     public static void skipTagViaVersion(FriendlyByteBuf friendlyByteBuf, int playerVersion) throws Exception {
         getTagType(playerVersion).read(friendlyByteBuf);
     }
 
+    public static CompoundTag readTagViaVersion(FriendlyByteBuf friendlyByteBuf, Player player) throws Exception {
+        return readTagViaVersion(friendlyByteBuf, Via.getAPI().getPlayerVersion(player.getUniqueId()));
+    }
+
     public static CompoundTag readTagViaVersion(FriendlyByteBuf friendlyByteBuf, int playerVersion) throws Exception {
         Type<com.viaversion.viaversion.libs.opennbt.tag.builtin.CompoundTag> from = getTagType(playerVersion);
         Type<com.viaversion.viaversion.libs.opennbt.tag.builtin.CompoundTag> to = getTagType(SharedConstants.getProtocolVersion());
@@ -150,9 +130,9 @@ public class ViaVersionHelper {
         }
 
         com.viaversion.viaversion.libs.opennbt.tag.builtin.CompoundTag tag = from.read(friendlyByteBuf);
-        ByteBuf buffer = Unpooled.buffer();
+        FriendlyByteBuf buffer = new FriendlyByteBuf(Unpooled.buffer());
         to.write(buffer, tag);
-        return new FriendlyByteBuf(buffer).readNbt();
+        return buffer.readNbt();
     }
 
 }