lokinet/llarp/messages/common.hpp

#pragma once

#include <llarp/crypto/crypto.hpp>
#include <llarp/dht/key.hpp>
#include <llarp/path/path_types.hpp>
#include <llarp/router_id.hpp>
#include <llarp/service/tag.hpp>
#include <llarp/util/bencode.hpp>
#include <llarp/util/buffer.hpp>
#include <llarp/util/logging.hpp>

#include <oxenc/bt.h>

namespace
{
  static auto link_cat = llarp::log::Cat("lokinet.link");
}  // namespace

namespace llarp
{
  namespace messages
  {
    inline std::string
    serialize_response(oxenc::bt_dict supplement = {})
    {
      return oxenc::bt_serialize(supplement);
    }

    // ideally STATUS is the first key in a bt-dict, so use a single, early ascii char
    inline const auto STATUS_KEY = "!"s;
    inline const auto TIMEOUT_RESPONSE = serialize_response({{STATUS_KEY, "TIMEOUT"}});
    inline const auto ERROR_RESPONSE = serialize_response({{STATUS_KEY, "ERROR"}});
    inline const auto OK_RESPONSE = serialize_response({{STATUS_KEY, "OK"}});
  }  // namespace messages

  /// abstract base class for serialized messages
  struct AbstractSerializable
  {
    virtual std::string
    bt_encode() const = 0;
    virtual void
    bt_encode(oxenc::bt_dict_producer& btdp) const = 0;
  };

  struct AbstractMessageHandler
  {
    virtual bool
    handle_message(AbstractSerializable&) = 0;
  };
}  // namespace llarp