syntax = "proto3";
option go_package = "./calc";
option java_package = "ch.sdi.calc";
package calc;

message CalculatorRequest {
  string expression = 1;
}

message CalculatorResponse {
  string expression = 1;
  double result = 2;
  int64 calculation_time_us = 3;
}

service Calculator {
  rpc Calculate(CalculatorRequest) returns (CalculatorResponse);
}