syntax = "proto3";

package echo;

// define EchoServer
service Echo {
    rpc Echo (EchoRequest) returns(EchoReply){}
}

// define Echo Server EchoRequest
message EchoRequest {
    string msg = 1;
}

// define Echo Response
// return unixtime
message EchoReply {
    string msg = 1;
    int64 unixtime = 2;
}