Proper ViaVersion

commons/src/main/java/net/swofty/commons/MinecraftVersion.java

@@ -48,6 +48,14 @@ public enum MinecraftVersion {
     MINECRAFT_1_20_5(766, new String[]{"1.20.5", "1.20.6"}),
     MINECRAFT_1_21(767, new String[]{"1.21", "1.21.1"}),
     MINECRAFT_1_21_2(768, new String[]{"1.21.2", "1.21.3"}),
+    MINECRAFT_1_21_4(769, new String[]{"1.21.4"}),
+    MINECRAFT_1_21_5(770, new String[]{"1.21.5"}),
+    MINECRAFT_1_21_6(771, new String[]{"1.21.6"}),
+    MINECRAFT_1_21_7(772, new String[]{"1.21.7"}),
+    MINECRAFT_1_21_8(772, new String[]{"1.21.8"}),
+    MINECRAFT_1_21_9(773, new String[]{"1.21.9"}),
+    MINECRAFT_1_21_10(773, new String[]{"1.21.10"}),
+    MINECRAFT_1_21_11(774, new String[]{"1.21.11"}),
     ;
 
     private final int protocol;
@@ -64,7 +72,5 @@ public static MinecraftVersion byProtocolId(int protocolID) {
                 .findFirst()
                 .orElse(null);
     }
-    public boolean isMoreRecentThan(MinecraftVersion version) {
-        return this.protocol > version.protocol;
-    }
+
 }

type.generic/src/main/java/net/swofty/type/generic/user/HypixelPlayer.java

@@ -32,9 +32,6 @@ public class HypixelPlayer extends Player {
 	@Setter
 	@Getter
 	private ServerType originServer = ServerType.SKYBLOCK_HUB;
-	@Setter
-	@Getter
-	private MinecraftVersion version = MinecraftVersion.MINECRAFT_1_20_3;
 	@Getter
 	private boolean readyForEvents = false;
 	@Getter

velocity.extension/src/main/java/net/swofty/velocity/SkyBlockVelocity.java

@@ -13,8 +13,10 @@
 import com.velocitypowered.api.event.player.KickedFromServerEvent;
 import com.velocitypowered.api.event.player.PlayerChooseInitialServerEvent;
 import com.velocitypowered.api.event.player.ServerConnectedEvent;
+import com.velocitypowered.api.event.player.ServerPostConnectEvent;
 import com.velocitypowered.api.event.proxy.ProxyInitializeEvent;
 import com.velocitypowered.api.event.proxy.ProxyPingEvent;
+import com.velocitypowered.api.network.ProtocolVersion;
 import com.velocitypowered.api.permission.PermissionFunction;
 import com.velocitypowered.api.plugin.Plugin;
 import com.velocitypowered.api.plugin.annotation.DataDirectory;
@@ -37,6 +39,7 @@
 import net.swofty.commons.ServerType;
 import net.swofty.commons.proxy.FromProxyChannels;
 import net.swofty.redisapi.api.RedisAPI;
+import net.swofty.velocity.command.ProtocolVersionCommand;
 import net.swofty.velocity.command.ServerStatusCommand;
 import net.swofty.velocity.data.CoopDatabase;
 import net.swofty.velocity.data.ProfilesDatabase;
@@ -174,6 +177,13 @@ public void onProxyInitialization(ProxyInitializeEvent event) {
 
 		commandManager.register(statusCommandMeta, new ServerStatusCommand());
 
+		CommandMeta protocolVersionMeta = commandManager.metaBuilder("protocolversion")
+				.aliases("protocol")
+				.plugin(this)
+				.build();
+
+		commandManager.register(protocolVersionMeta, new ProtocolVersionCommand());
+
 
 		/**
 		 * Handle database
@@ -339,6 +349,22 @@ public void onPing(ProxyPingEvent event) {
         ));
     }
 
+	@Subscribe
+	public void onPlayerConnect(ServerPostConnectEvent event) {
+		if (!(event.getPlayer().getProtocolVersion().getProtocol() >= ProtocolVersion.MAXIMUM_VERSION.getProtocol())) {
+			StringBuilder message = new StringBuilder();
+
+			message.append("\n");
+			message.append("§6§l----------- §cServer Notice §6§l-----------\n");
+			message.append("§cAlthough we do support versions prior to §6" + ProtocolVersion.MAXIMUM_VERSION.getVersionIntroducedIn() + "§c, the experience may be buggy.\n");
+			message.append("§cIf you experience a bug, please test if it also occurs on §6" + ProtocolVersion.MAXIMUM_VERSION.getVersionIntroducedIn() + "§c before reporting it.\n");
+			message.append("§6§l---------------------------------\n");
+			message.append("\n");
+
+			event.getPlayer().sendMessage(Component.text(message.toString()));
+		}
+	}
+
 	public static <T> Stream<T> loopThroughPackage(String packageName, Class<T> clazz) {
 		Reflections reflections = new Reflections(packageName);
 		Set<Class<? extends T>> subTypes = reflections.getSubTypesOf(clazz);

velocity.extension/src/main/java/net/swofty/velocity/command/ProtocolVersionCommand.java

@@ -0,0 +1,23 @@
+package net.swofty.velocity.command;
+
+import com.velocitypowered.api.command.CommandSource;
+import com.velocitypowered.api.command.SimpleCommand;
+import com.velocitypowered.api.network.ProtocolVersion;
+import com.velocitypowered.api.proxy.Player;
+import net.kyori.adventure.text.Component;
+
+import java.util.List;
+
+public class ProtocolVersionCommand implements SimpleCommand {
+
+	@Override
+	public void execute(Invocation invocation) {
+		CommandSource source = invocation.source();
+		if (!(source instanceof Player player)) {
+			return;
+		}
+		ProtocolVersion version = player.getProtocolVersion();
+		List<String> versionsSupportedBy = version.getVersionsSupportedBy();
+		player.sendMessage(Component.text(version.getProtocol() + " §7(" + String.join(", ", versionsSupportedBy) + ")"));
+	}
+}

velocity.extension/src/main/java/net/swofty/velocity/viaversion/provider/SkyBlockVersionProvider.java

@@ -29,7 +29,7 @@ public ProtocolVersion getClosestServerProtocol(UserConnection user) throws Exce
     }
 
     private ProtocolVersion getBackProtocol(UserConnection user) {
-        return ProtocolVersion.v1_21_4; // backend server version
+        return ProtocolVersion.v1_21_11; // backend server version
     }
 
     private ProtocolVersion getFrontProtocol(UserConnection user) throws Exception {