text: #pragma once
  
  #include "gyuanx_logger.h"
  
  struct pow_difficulty_t;
  
  namespace gyuanx {
  
  namespace dns {
  
  std::vector<pow_difficulty_t> query_pow_difficulty(std::error_code& ec);
  
  void check_latest_version();
  
  } // namespace dns
  } // namespace gyuanx
  