Method generate_hello_user_data

libraries/net/node.cpp:1454–1488

    fc::variant_object node_impl::generate_hello_user_data()
    {
      VERIFY_CORRECT_THREAD();
      // for the time being, shoehorn a bunch of properties into the user_data variant object,
      // which lets us add and remove fields without changing the protocol.  Once we
      // settle on what we really want in there, we'll likely promote them to first
      // class fields in the hello message
      fc::mutable_variant_object user_data;
      user_data["fc_git_revision_sha"] = fc::git_revision_sha;
      user_data["fc_git_revision_unix_timestamp"] = fc::git_revision_unix_timestamp;
#if defined( __APPLE__ )
      user_data["platform"] = "osx";
#elif defined( __OpenBSD__ )
      user_data["platform"] = "obsd";
#elif defined( __linux__ )
      user_data["platform"] = "linux";
#elif defined( _MSC_VER )
      user_data["platform"] = "win32";
#else
      user_data["platform"] = "other";
#endif
      user_data["bitness"] = sizeof(void*) * 8;

      user_data["node_id"] = fc::variant( _node_id, 1 );

      item_hash_t head_block_id = _delegate->get_head_block_id();
      user_data["last_known_block_hash"] = fc::variant( head_block_id, 1 );
      user_data["last_known_block_number"] = _delegate->get_block_number(head_block_id);
      user_data["last_known_block_time"] = _delegate->get_block_time(head_block_id);

      if (!_hard_fork_block_numbers.empty())
        user_data["last_known_fork_block_number"] = _hard_fork_block_numbers.back();

      return user_data;
    }
    void node_impl::parse_hello_user_data_for_peer(peer_connection* originating_peer, const fc::variant_object& user_data)
    {
      VERIFY_CORRECT_THREAD();