fetter try

src/main/java/emu/grasscutter/data/GenshinData.java

 package emu.grasscutter.data;
 
 import java.lang.reflect.Field;
+import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 import emu.grasscutter.Grasscutter;
@@ -54,6 +56,7 @@ public class GenshinData {
 	private static final Int2ObjectMap<AvatarCostumeData> avatarCostumeDataItemIdMap = new Int2ObjectLinkedOpenHashMap<>();
 	
 	private static final Int2ObjectMap<SceneData> sceneDataMap = new Int2ObjectLinkedOpenHashMap<>();
+	private static final Int2ObjectMap<FetterData> fetterDataMap = new Int2ObjectOpenHashMap<>();
 	
 	public static Int2ObjectMap<?> getMapByResourceDef(Class<?> resourceDefinition) {
 		Int2ObjectMap<?> map = null;
@@ -221,4 +224,16 @@ public class GenshinData {
 	public static Int2ObjectMap<SceneData> getSceneDataMap() {
 		return sceneDataMap;
 	}
+
+	public static Map<Integer, List<Integer>> getFetterDataEntries() {
+		// Can I do this?
+		Map<Integer, List<Integer>> fetters = new HashMap<>();
+		fetterDataMap.forEach((k, v) -> {
+			if (!fetters.containsKey(v.getAvatarId())) {
+				fetters.put(v.getAvatarId(), new ArrayList<>());
+			}
+			fetters.get(v.getAvatarId()).add(k);
+		});
+		return fetters;
+	}
 }

src/main/java/emu/grasscutter/data/def/AvatarData.java

@@ -55,6 +55,8 @@ public class AvatarData extends GenshinResource {
     private float[] defenseGrowthCurve;
     private AvatarSkillDepotData skillDepot;
     private IntList abilities;
+
+    private List<Integer> fetters;
     
 	@Override
 	public int getId(){
@@ -193,9 +195,16 @@ public class AvatarData extends GenshinResource {
 		return abilities;
 	}
 
+    public List<Integer> getFetters() {
+        return fetters;
+    }
+
 	@Override
 	public void onLoad() {
     	this.skillDepot = GenshinData.getAvatarSkillDepotDataMap().get(this.SkillDepotId);
+
+        // Get fetters from GenshinData
+        this.fetters = GenshinData.getFetterDataEntries().get(this.Id);
     	
     	int size = GenshinData.getAvatarCurveDataMap().size();
     	this.hpGrowthCurve = new float[size];

src/main/java/emu/grasscutter/data/def/FetterData.java

+package emu.grasscutter.data.def;
+
+import emu.grasscutter.data.GenshinResource;
+import emu.grasscutter.data.ResourceType;
+import emu.grasscutter.data.ResourceType.LoadPriority;
+
+@ResourceType(name = {"FetterInfoExcelConfigData.json", "FettersExcelConfigData.json", "FetterStoryExcelConfigData.json"}, loadPriority = LoadPriority.HIGHEST)
+public class FetterData extends GenshinResource {
+    private int AvatarId;
+    private int FetterId;
+
+    @Override
+	public int getId() {
+		return FetterId;
+	}
+
+    public int getAvatarId() {
+        return AvatarId;
+    }
+
+    @Override
+    public void onLoad() {
+    }
+}

src/main/java/emu/grasscutter/game/avatar/GenshinAvatar.java

 package emu.grasscutter.game.avatar;
 
+import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.List;
 import java.util.Map;
 import java.util.Set;
 
@@ -39,9 +41,11 @@ import emu.grasscutter.game.inventory.EquipType;
 import emu.grasscutter.game.inventory.GenshinItem;
 import emu.grasscutter.game.props.ElementType;
 import emu.grasscutter.game.props.EntityIdType;
+import emu.grasscutter.game.props.FetterState;
 import emu.grasscutter.game.props.FightProperty;
 import emu.grasscutter.game.props.PlayerProperty;
 import emu.grasscutter.net.proto.AvatarFetterInfoOuterClass.AvatarFetterInfo;
+import emu.grasscutter.net.proto.FetterDataOuterClass.FetterData;
 import emu.grasscutter.net.proto.AvatarInfoOuterClass.AvatarInfo;
 import emu.grasscutter.server.packet.send.PacketAbilityChangeNotify;
 import emu.grasscutter.server.packet.send.PacketAvatarEquipChangeNotify;
@@ -73,6 +77,8 @@ public class GenshinAvatar {
 	@Transient private final Int2FloatOpenHashMap fightProp;
 	@Transient private Set<String> extraAbilityEmbryos;
 	
+	private List<Interget> fetters;
+
 	private Map<Integer, Integer> skillLevelMap; // Talent levels
 	private Map<Integer, Integer> proudSkillBonusMap; // Talent bonus levels (from const)
 	private int skillDepotId;
@@ -89,7 +95,8 @@ public class GenshinAvatar {
 		this.equips = new Int2ObjectOpenHashMap<>();
 		this.fightProp = new Int2FloatOpenHashMap();
 		this.extraAbilityEmbryos = new HashSet<>();
-		this.proudSkillBonusMap = new HashMap<>(); // TODO Move to genshin avatar
+		this.proudSkillBonusMap = new HashMap<>(); 
+		this.fetters = new ArrayList<>(); // TODO Move to genshin avatar
 	}
 	
 	// On creation
@@ -266,6 +273,14 @@ public class GenshinAvatar {
 		return extraAbilityEmbryos;
 	}
 
+	public void setFetterList(List<Integer> fetterList) {
+		this.fetterList = fetterList;
+	}
+
+	public List<Integer> getFetterList() {
+		return fetterList;
+	}
+
 	public float getCurrentHp() {
 		return currentHp;
 	}
@@ -385,6 +400,9 @@ public class GenshinAvatar {
 		// Extra ability embryos
 		Set<String> prevExtraAbilityEmbryos = this.getExtraAbilityEmbryos();
 		this.extraAbilityEmbryos = new HashSet<>();
+
+		// Fetters
+		this.setFetterList(data.getFetters());
 		
 		// Get hp percent, set to 100% if none
 		float hpPercent = this.getFightProperty(FightProperty.FIGHT_PROP_MAX_HP) <= 0 ? 1f : this.getFightProperty(FightProperty.FIGHT_PROP_CUR_HP) / this.getFightProperty(FightProperty.FIGHT_PROP_MAX_HP);
@@ -683,6 +701,18 @@ public class GenshinAvatar {
 	}
 	
 	public AvatarInfo toProto() {
+		AvatarFetterInfo.Builder avatarFetter = AvatarFetterInfo.newBuilder()
+				.setExpLevel(10)
+				.setExpNumber(6325); // Highest Level
+		
+		for (int i = 0; i < this.getFetterList().size(); i++) {
+			avatarFetter.addFetterList(
+				FetterData.newBuilder()
+					.setFetterId(this.getFetterList().get(i))
+					.setFetterState(FetterState.FINISH.getValue())
+			);
+		}
+
 		AvatarInfo.Builder avatarInfo = AvatarInfo.newBuilder()
 				.setAvatarId(this.getAvatarId())
 				.setGuid(this.getGuid())
@@ -696,7 +726,7 @@ public class GenshinAvatar {
 				.putAllProudSkillExtraLevel(getProudSkillBonusMap())
 				.setAvatarType(1)
 				.setBornTime(this.getBornTime())
-				.setFetterInfo(AvatarFetterInfo.newBuilder().setExpLevel(1))
+				.setFetterInfo(avatarFetter)
 				.setWearingFlycloakId(this.getFlyCloak())
 				.setCostumeId(this.getCostume());
 		

src/main/java/emu/grasscutter/game/props/FetterState.java

+package emu.grasscutter.game.props;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.stream.Stream;
+
+import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
+import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
+
+public enum FetterState {
+    NONE(0),
+    NOT_OPEN(1),
+    OPEN(1),
+    FINISH(3);
+	
+	private final int value;
+	private static final Int2ObjectMap<FetterState> map = new Int2ObjectOpenHashMap<>();
+	private static final Map<String, FetterState> stringMap = new HashMap<>();
+	
+	static {
+		Stream.of(values()).forEach(e -> {
+			map.put(e.getValue(), e);
+			stringMap.put(e.name(), e);
+		});
+	}
+	
+	private FetterState(int value) {
+		this.value = value;
+	}
+
+	public int getValue() {
+		return value;
+	}
+	
+	public static FetterState getTypeByValue(int value) {
+		return map.getOrDefault(value, NONE);
+	}
+	
+	public static FetterState getTypeByName(String name) {
+		return stringMap.getOrDefault(name, NONE);
+	}
+}