// contactClass.dart class Contact { final String name; final String phoneNumber; final bool isFavorite; final bool isLocked; final String? publicKey; Contact( this.name, this.phoneNumber, { this.isFavorite = false, this.isLocked = false, this.publicKey, }); } // Sample contacts list List contacts = [ Contact('Alice', '1234567890'), Contact('Bob', '0987654321', isFavorite: true, publicKey: 'ABCD...WXYZ'), Contact('Charlie', '5555555555', isLocked: true), // Add more contacts as needed ];