syntax = "proto3";

package user.v1;

// 用户服务：一个一元调用 + 一个服务端流
service UserService {
  rpc GetUser(GetUserRequest) returns (User);
  rpc ListUsers(ListUsersRequest) returns (stream User);
}

message GetUserRequest {
  int64 id = 1;
}

message ListUsersRequest {
  int32 page_size = 1;
}

message User {
  int64 id = 1;
  string name = 2;
  string email = 3;
  // 字段编号一旦发布就不能修改或复用；删除字段时用 reserved
  reserved 4;
  reserved "phone";
}