command fix

src/main/java/emu/grasscutter/command/commands/SetFetterLevelCommand.java

@@ -4,8 +4,10 @@ import java.util.List;
 
 import emu.grasscutter.command.Command;
 import emu.grasscutter.command.CommandHandler;
+import emu.grasscutter.data.GenshinData;
 import emu.grasscutter.game.GenshinPlayer;
-import emu.grasscutter.game.entity.EntityAvatar;
+import emu.grasscutter.game.avatar.GenshinAvatar;
+import emu.grasscutter.server.packet.send.PacketAvatarFetterDataNotify;
 
 @Command(label = "setfetterlevel", usage = "setfetterlevel <level>",
         description = "Sets your fetter level for your current active character",
@@ -30,8 +32,13 @@ public final class SetFetterLevelCommand implements CommandHandler {
                 CommandHandler.sendMessage(sender, "Fetter level must be between 0 and 10.");
                 return;
             }
-            EntityAvatar avatar = sender.getTeamManager().getCurrentAvatarEntity();
-            avatar.getAvatar().setFetterLevel(fetterLevel);
+            GenshinAvatar avatar = sender.getTeamManager().getCurrentAvatarEntity().getAvatar();
+
+            avatar.setFetterLevel(fetterLevel);
+		    avatar.setFetterExp(GenshinData.getAvatarFetterLevelDataMap().get(fetterLevel).getExp());
+		    avatar.save();
+		
+		    sender.sendPacket(new PacketAvatarFetterDataNotify(avatar));
             CommandHandler.sendMessage(sender, "Fetter level set to " + fetterLevel);
         } catch (NumberFormatException ignored) {
             CommandHandler.sendMessage(null, "Invalid fetter level.");

src/main/java/emu/grasscutter/server/packet/send/PacketAvatarFetterDataNotify.java

+package emu.grasscutter.server.packet.send;
+
+import emu.grasscutter.game.avatar.GenshinAvatar;
+import emu.grasscutter.game.props.FetterState;
+import emu.grasscutter.net.packet.GenshinPacket;
+import emu.grasscutter.net.packet.PacketOpcodes;
+import emu.grasscutter.net.proto.AvatarFetterDataNotifyOuterClass.AvatarFetterDataNotify;
+import emu.grasscutter.net.proto.AvatarFetterInfoOuterClass.AvatarFetterInfo;
+import emu.grasscutter.net.proto.FetterDataOuterClass.FetterData;
+
+public class PacketAvatarFetterDataNotify extends GenshinPacket {
+	
+	public PacketAvatarFetterDataNotify(GenshinAvatar avatar) {
+		super(PacketOpcodes.AvatarFetterDataNotify);
+
+		AvatarFetterInfo.Builder avatarFetter = AvatarFetterInfo.newBuilder()
+				.setExpLevel(avatar.getFetterLevel())
+				.setExpNumber(avatar.getFetterExp());
+		
+		if (avatar.getFetterList() != null) {
+			for (int i = 0; i < avatar.getFetterList().size(); i++) {
+				avatarFetter.addFetterList(
+					FetterData.newBuilder()
+						.setFetterId(avatar.getFetterList().get(i))
+						.setFetterState(FetterState.FINISH.getValue())
+				);
+			}
+		}
+
+		AvatarFetterInfo avatarFetterInfo = avatarFetter.build();
+		
+		AvatarFetterDataNotify proto = AvatarFetterDataNotify.newBuilder()
+            .putFetterInfoMap(avatar.getGuid(), avatarFetterInfo)
+            .build();
+		
+		this.setData(proto);
+	}
+}