axum-connect/axum-connect-examples/proto/hello.proto

syntax = "proto3";

package package.path;

message HelloRequest {
    message EmbeddedOne {
        message EmbeddedTwo {
            string name = 1;
        }
        EmbeddedTwo embedded_two = 1;
    }
    string name = 1;
    EmbeddedOne embedded_one = 2;
}

message HelloResponse {
    string message = 1;
}

service HelloWorldService {
    rpc SayHello(HelloRequest) returns (HelloResponse) {}
}