Add handler for SetSignatureCsReq

src/main/java/emu/lunarcore/game/player/Player.java

@@ -147,6 +147,14 @@ public class Player {
         return false;
     }
     
+    public void setSignature(String signature) {
+        if (signature.length() > 50) { // Client's max signature length is 50
+            signature = signature.substring(0, 49);
+        }
+        this.signature = signature;
+        this.save();
+    }
+    
     public int setBirthday(int birthday) {
         if (this.birthday == 0) {
             int month = birthday / 100;

src/main/java/emu/lunarcore/server/packet/recv/HandlerSetSignatureCsReq.java

@@ -0,0 +1,21 @@
+package emu.lunarcore.server.packet.recv;
+
+import emu.lunarcore.proto.SetSignatureCsReqOuterClass.SetSignatureCsReq;
+import emu.lunarcore.server.game.GameSession;
+import emu.lunarcore.server.packet.CmdId;
+import emu.lunarcore.server.packet.Opcodes;
+import emu.lunarcore.server.packet.PacketHandler;
+import emu.lunarcore.server.packet.send.PacketSetSignatureScRsp;
+
+@Opcodes(CmdId.SetSignatureCsReq)
+public class HandlerSetSignatureCsReq extends PacketHandler {
+
+    @Override
+    public void handle(GameSession session, byte[] header, byte[] data) throws Exception {
+        var req = SetSignatureCsReq.parseFrom(data);
+        
+        session.getPlayer().setSignature(req.getSignature());
+        session.send(new PacketSetSignatureScRsp(session.getPlayer()));
+    }
+
+}

src/main/java/emu/lunarcore/server/packet/send/PacketSetSignatureScRsp.java

@@ -0,0 +1,18 @@
+package emu.lunarcore.server.packet.send;
+
+import emu.lunarcore.game.player.Player;
+import emu.lunarcore.proto.SetSignatureScRspOuterClass.SetSignatureScRsp;
+import emu.lunarcore.server.packet.BasePacket;
+import emu.lunarcore.server.packet.CmdId;
+
+public class PacketSetSignatureScRsp extends BasePacket {
+
+    public PacketSetSignatureScRsp(Player player) {
+        super(CmdId.SetSignatureScRsp);
+        
+        var data = SetSignatureScRsp.newInstance()
+                .setSignature(player.getSignature());
+        
+        this.setData(data);
+    }
+}