diff --git a/db.h b/db.h
index ef1c07e..caea162 100644
--- a/db.h
+++ b/db.h
@@ -3,30 +3,14 @@
 
 #include <string>
 #include <vector>
-#include "user.h"
 
 struct Student {
-    int id;
     std::string nom;
     int notes[3];
 };
 
-// --- Connexion et fermeture ---
-bool openDB(const std::string& filename);
-void closeDB();
-
-// --- Authentification ---
-int loginUser(const std::string& login, const std::string& password);
-
-// --- Étudiants ---
-std::vector<Student> getAllStudents();               // ADMIN/PROF
-Student getStudentByLogin(const std::string& login); // STUDENT
-
-// --- Notes ---
-bool updateNote(int studentId, int noteIndex, int newNote);
-
-// --- Export / Import ---
-bool exportData(const std::string& filename, const std::string& role, const std::string& login);
-bool importData(const std::string& filename, const std::string& role);
+// Export / Import
+bool exportData(const std::string& filename, const std::vector<Student>& students);
+bool importData(const std::string& filename, std::vector<Student>& students);
 
 #endif
\ No newline at end of file