import '../models/grocery_item.dart';
abstract class GroceryRepository {
Future<GroceryItem?> lookupBarcode(String barcode);
List<GroceryItem> getScanHistory();
void addToHistory(GroceryItem item);
void clearHistory();
}
import '../models/grocery_item.dart';
abstract class GroceryRepository {
Future<GroceryItem?> lookupBarcode(String barcode);
List<GroceryItem> getScanHistory();
void addToHistory(GroceryItem item);
void clearHistory();
}