structs.sol

// the contract's owner address
address payable public owner;

// the customer address
address public customerAddress;

// Order struct
struct Order {
  uint ID;
  string burgerMenu;
  uint quantity;		
  uint price;
  uint safePayment;
  uint orderDate;
  uint deliveryDate;
  bool created;			
}

// Invoice struct
struct Invoice {
  uint ID;		
  uint orderNo;		
  bool created;
}