syntax = "proto3";

package example;

message Item {
  string product_id = 1;
  int32 quantity = 2;
  int32 cents = 3;
}

message Address {
  string street = 1;
  string city = 2;
  string zip = 3;
}

message PersonalInfo {
  string first_name = 1;
  string last_name = 2;
}

message Customer {
  int32 id = 1;
  
  oneof info {
    string email = 2;
    PersonalInfo personal = 3;
  }
}

message Order {
  int32 order_id = 1;
  Customer customer = 2;
  repeated Item items = 3;
  Address shipping_address = 4;
  map<string, int32> metadata = 5;
}