fix McoinExchangeHcoinRsp packet structure

src/main/java/emu/grasscutter/server/packet/recv/HandlerMcoinExchangeHcoinReq.java

@@ -4,6 +4,7 @@ import emu.grasscutter.net.packet.Opcodes;
 import emu.grasscutter.net.packet.PacketHandler;
 import emu.grasscutter.net.packet.PacketOpcodes;
 import emu.grasscutter.net.proto.McoinExchangeHcoinReqOuterClass;
+import emu.grasscutter.net.proto.RetcodeOuterClass;
 import emu.grasscutter.server.game.GameSession;
 import emu.grasscutter.server.packet.send.PacketMcoinExchangeHcoinRsp;
 
@@ -15,13 +16,13 @@ public class HandlerMcoinExchangeHcoinReq extends PacketHandler {
         McoinExchangeHcoinReqOuterClass.McoinExchangeHcoinReq exchangeReq = McoinExchangeHcoinReqOuterClass.McoinExchangeHcoinReq.parseFrom(payload);
         
         if (session.getPlayer().getCrystals() < exchangeReq.getMCoinNum() && exchangeReq.getMCoinNum() == exchangeReq.getHCoinNum()) {
+            session.send(new PacketMcoinExchangeHcoinRsp(RetcodeOuterClass.Retcode.RET_UNKNOWN_ERROR_VALUE));
             return;
         }
         
         session.getPlayer().setCrystals(session.getPlayer().getCrystals() - exchangeReq.getMCoinNum());
         session.getPlayer().setPrimogems(session.getPlayer().getPrimogems() + exchangeReq.getHCoinNum());
         session.getPlayer().save();
-        
-        session.send(new PacketMcoinExchangeHcoinRsp(session.getPlayer().getCrystals(), session.getPlayer().getPrimogems()));
+        session.send(new PacketMcoinExchangeHcoinRsp(RetcodeOuterClass.Retcode.RET_SUCC_VALUE));
     }
 }

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

@@ -6,13 +6,13 @@ import emu.grasscutter.net.proto.McoinExchangeHcoinRspOuterClass;
 
 public class PacketMcoinExchangeHcoinRsp extends BasePacket {
 
-    public PacketMcoinExchangeHcoinRsp(int mcoin, int hcoin) {
+    public PacketMcoinExchangeHcoinRsp(int retCode) {
         super(PacketOpcodes.McoinExchangeHcoinRsp);
 
-        McoinExchangeHcoinRspOuterClass.McoinExchangeHcoinRsp mcoinExchangeHcoinRsp = McoinExchangeHcoinRspOuterClass.McoinExchangeHcoinRsp.newBuilder()
-                .setMCoinNum(mcoin)
-                .setHCoinNum(hcoin).build();
+        McoinExchangeHcoinRspOuterClass.McoinExchangeHcoinRsp proto = McoinExchangeHcoinRspOuterClass.McoinExchangeHcoinRsp.newBuilder()
+                .setRetcode(retCode)
+                .build();
 
-        this.setData(mcoinExchangeHcoinRsp);
+        this.setData(proto);
     }
 }