Document some of trade

include/constants/trade.h

@@ -3,11 +3,40 @@
 
 #define TRADE_PLAYER  0
 #define TRADE_PARTNER 1
-#define TRADE_PARTICIPANT_COUNT 2
 
 #define INGAME_TRADE_SEEDOT 0
 #define INGAME_TRADE_PLUSLE 1
 #define INGAME_TRADE_HORSEA 2
 #define INGAME_TRADE_MEOWTH 3
 
+#define INGAME_TRADE_MAIL_LENGTH 9
+
+#define PLAYER_MON_INVALID   0
+#define PLAYER_MON_VALID     1
+#define PARTNER_MON_INVALID  2
+
+#define MON_VALID 0
+
+
+#define TRADE_ACTION_TEXT_CANCEL        0
+#define TRADE_ACTION_TEXT_CHOOSE_MON    1
+#define TRADE_ACTION_TEXT_SUMMARY       2
+#define TRADE_ACTION_TEXT_TRADE         3
+#define TRADE_ACTION_TEXT_CANCEL_TRADE  4
+#define TRADE_ACTION_TEXT_JP_QUIT       5
+
+#define MENU_ACTION_SUMMARY 0
+#define MENU_ACTION_TRADE   1
+
+#define TRADE_MSG_STANDBY                    0
+#define TRADE_MSG_CANCELED                   1
+#define TRADE_MSG_ONLY_MON1                  2
+#define TRADE_MSG_ONLY_MON2                  3
+#define TRADE_MSG_WAITING_FOR_FRIEND         4
+#define TRADE_MSG_FRIEND_WANTS_TO_TRADE      5
+#define TRADE_MSG_MON_CANT_BE_TRADED         6
+#define TRADE_MSG_EGG_CANT_BE_TRADED         7
+#define TRADE_MSG_FRIENDS_MON_CANT_BE_TRADED 8
+
+
 #endif //GUARD_CONSTANTS_TRADE_H