Fix item caching bugs

protocol/packets.py

@@ -259,3 +259,30 @@ class ClickWindowPacket(Packet):
         {'mode': VarInt},
         {'clicked_item': Slot},
     ]
+
+
+class ClientWindowConfirmationPacket(Packet):
+    # Sent by the server indicating whether a request from the client was accepted
+    # https://wiki.vg/Protocol#Window_Confirmation_.28clientbound.29
+
+    id = 0x11
+    packet_name = 'client window confirmation'
+
+    definition = [
+        {'window_id': Byte},
+        {'action_number': Short},
+        {'accepted': Boolean},
+    ]
+
+class ServerWindowConfirmationPacket(Packet):
+    # Sent by the client to confirm an unaccepted click
+    # https://wiki.vg/Protocol#Window_Confirmation_.28serverbound.29
+
+    id = 0x07
+    packet_name = 'client window confirmation'
+
+    definition = [
+        {'window_id': Byte},
+        {'action_number': Short},
+        {'accepted': Boolean},
+    ]