diff --git a/main.c b/main.c
index f1c5997..00514dc 100755
--- a/main.c
+++ b/main.c
@@ -93,6 +93,10 @@ int getNear(int dir){
 	return map[coord.x][coord.y].type;
 }
 
+int getInventory(){
+	return current_dude->inventory;
+}
+
 void spawnDudes(){
 	int i;
 	t_dude new_dude;
diff --git a/orange.c b/orange.c
index 0660416..f3c37fd 100644
--- a/orange.c
+++ b/orange.c
@@ -7,7 +7,7 @@ typedef struct{
 	int plop; // custom info
 } t_data;
 
-t_action orange_update(void* my_info, void* com_data, int success){
+t_action orange_update(void* my_info, t_com* communication_data, int success){
 	t_data* data = (t_data*)my_info;
 	t_action action;
 	
diff --git a/purple.c b/purple.c
index 7118807..be0f063 100644
--- a/purple.c
+++ b/purple.c
@@ -40,7 +40,7 @@ int dist(t_coord coord, int x, int y){
 	return abs(coord.x-x) + abs(coord.y-y);
 }
 
-t_action purple_update(void* my_info, void* com_data, int success){
+t_action purple_update(void* my_info, t_com* com_data, int success){
 	t_data* data = (t_data*)my_info;
 	t_action action;
 	int i, type;
diff --git a/team.h b/team.h
index 3eb50eb..c182865 100644
--- a/team.h
+++ b/team.h
@@ -1,14 +1,35 @@
 #ifndef TEAM_H
 #define TEAM_H
 
-#define LIBRARY_SIZE 128
-#define DUDE_MEMORY 128
+#define WRITE 0
+#define READ 4
+
+// coordinates structure
+typedef struct{
+	int x;
+	int y;
+} t_coord;
 
 // Directions
 enum{
 	NORTH, SOUTH, EAST, WEST
 };
 
+// communication
+#define LIBRARY_SIZE 128
+#define DUDE_MEMORY 128
+enum{
+	BOOK_1,
+	BOOK_2,
+	BOOK_3,
+	BOOK_4
+};
+
+typedef struct{
+	int flag;
+	char data[32];
+} t_com;
+
 // Tile types
 enum{
 	BEDROCK, GRASS, TREE, BERRIES, ROCK, IRON_ORE, // nature
@@ -19,25 +40,21 @@ enum{
 
 // Action types
 enum{
-	MOVE, ATTACK, PICK, PUT, WORK, WAIT, COMMUNICATE
+	MOVE,
+	ATTACK,
+	PICK,
+	PUT,
+	WORK,
+	WAIT,
+	COMMUNICATE
 };
 
-typedef struct{
-	int x;
-	int y;
-} t_coord;
-
 typedef struct{
 	int type;
 	int dir;
 	void* data;
 } t_action;
 
-typedef struct{
-	int dest;
-	void* message;
-} t_communication;
-
 int getInventory();
 
 int getNear(int dir);
diff --git a/tools.c b/tools.c
index 6dea48e..654cbd9 100644
--- a/tools.c
+++ b/tools.c
@@ -6,6 +6,10 @@ typedef struct{
 	int ok;
 } t_move;
 
+typedef struct{
+	int dmg;
+} t_attack;
+
 t_move* clearMoves[MAX_DUDES*NB_TEAMS];
 int nb_clear = 0;
 t_move* occupiedMoves[MAX_DUDES*NB_TEAMS];