lokinet/llarp/service/info.hpp

#pragma once

#include <oxenc/bt.h>

#include <llarp/crypto/types.hpp>
#include "address.hpp"
#include "vanity.hpp"
#include <llarp/util/bencode.hpp>

#include <optional>

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

namespace llarp::service
{
  struct ServiceInfo
  {
   private:
    PubKey enckey;
    PubKey signkey;
    mutable Address m_CachedAddr;

   public:
    VanityNonce vanity;
    uint64_t version = llarp::constants::proto_version;

    void
    RandomizeVanity()
    {
      vanity.Randomize();
    }

    bool
    verify(uint8_t* buf, size_t size, const Signature& sig) const;

    const PubKey&
    EncryptionPublicKey() const
    {
      if (m_CachedAddr.IsZero())
      {
        CalculateAddress(m_CachedAddr.as_array());
      }
      return enckey;
    }

    bool
    Update(const byte_t* sign, const byte_t* enc, const std::optional<VanityNonce>& nonce = {});

    bool
    operator==(const ServiceInfo& other) const
    {
      return enckey == other.enckey && signkey == other.signkey && version == other.version
          && vanity == other.vanity;
    }

    bool
    operator!=(const ServiceInfo& other) const
    {
      return !(*this == other);
    }

    bool
    operator<(const ServiceInfo& other) const
    {
      return Addr() < other.Addr();
    }

    std::string
    ToString() const;

    /// .loki address
    std::string
    Name() const;

    bool
    UpdateAddr();

    const Address&
    Addr() const
    {
      if (m_CachedAddr.IsZero())
      {
        CalculateAddress(m_CachedAddr.as_array());
      }
      return m_CachedAddr;
    }

    /// calculate our address
    bool
    CalculateAddress(std::array<byte_t, 32>& data) const;

    bool
    BDecode(llarp_buffer_t* buf)
    {
      if (not bencode_decode_dict(*this, buf))
        return false;
      return UpdateAddr();
    }

    void
    bt_encode(oxenc::bt_dict_producer& btdp) const;

    bool
    decode_key(const llarp_buffer_t& key, llarp_buffer_t* buf);
  };
}  // namespace llarp::service

template <>
constexpr inline bool llarp::IsToStringFormattable<llarp::service::ServiceInfo> = true;