Sample with repeated and optional rules

repeated_optional.proto

import "covid_updates.proto";

enum SortType {
    ASCENDING = 1;
    DESCENDING = 2;
}


message CovidUpdateRequest {
    optional uint32 size = 1;  // How many records
    optional SortType sort = 2;
    optional uint64 date = 3;  // This request works only per date basis (for simplicity)
    optional UpdateType type = 4;   // Only requesting messages for an specific update type
}


message CovidUpdatesResponse {
    optional uint32 amount = 1;
    repeated CovidUpdate updates = 2;
}