medium_grpc_proto_example.proto

syntax = "proto3

service UserStore {
  rpc GetUserDataByEmail(UserEmailRequest) returns (UserResponse);
}

message User {
  string email = 1;
  string firstname = 2;
  string lastname = 3;
}

message UserEmailRequest {
  string email = 1;
}

message UserResponse {
  User user = 1;
  string error = 2;
}