gRPC-haskell/examples/echo/echo.proto

syntax = "proto3";

package echo;

service Echo {
  rpc DoEcho (EchoRequest) returns (EchoRequest) {}
}

message EchoRequest {
  string message = 1;
}

message AddRequest {
  fixed32 addX = 1;
  fixed32 addY = 2;
}

message AddResponse {
  fixed32 answer = 1;
}

service Add {
  rpc DoAdd (AddRequest) returns (AddResponse) {}
}