text: // Copyright (c) 2014-2020, The BRT Project
  // 
  // All rights reserved.
  // 
  // Redistribution and use in source and binary forms, with or without modification, are
  // permitted provided that the following conditions are met:
  // 
  // 1. Redistributions of source code must retain the above copyright notice, this list of
  //    conditions and the following disclaimer.
  // 
  // 2. Redistributions in binary form must reproduce the above copyright notice, this list
  //    of conditions and the following disclaimer in the documentation and/or other
  //    materials provided with the distribution.
  // 
  // 3. Neither the name of the copyright holder nor the names of its contributors may be
  //    used to endorse or promote products derived from this software without specific
  //    prior written permission.
  // 
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
  // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
  // THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
  // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  // 
  // Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
  
  #pragma once
  
  #include "cryptonote_basic.h"
  #include "crypto/crypto.h"
  #include "crypto/hash.h"
  
  
  namespace cryptonote {
    /************************************************************************/
    /*                                                                      */
    /************************************************************************/
    template<class t_array>
    struct array_hasher: std::unary_function<t_array&, std::size_t>
    {
      std::size_t operator()(const t_array& val) const
      {
        return boost::hash_range(&val.data[0], &val.data[sizeof(val.data)]);
      }
    };
  
  
  #pragma pack(push, 1)
    struct public_address_outer_blob
    {
      uint8_t m_ver;
      account_public_address m_address;
      uint8_t check_sum;
    };
    struct public_integrated_address_outer_blob
    {
      uint8_t m_ver;
      account_public_address m_address;
      crypto::hash8 payment_id;
      uint8_t check_sum;
    };
  #pragma pack (pop)
  
    namespace
    {
      inline std::string return_first_address(const std::string &url, const std::vector<std::string> &addresses, bool dnssec_valid)
      {
        if (addresses.empty())
          return {};
        return addresses[0];
      }
    }
  
    struct address_parse_info
    {
      account_public_address address;
      bool is_subaddress;
      bool has_payment_id;
      crypto::hash8 payment_id;
    };
  
    /************************************************************************/
    /* Cryptonote helper functions                                          */
    /************************************************************************/
    size_t get_min_block_weight(uint8_t version);
    size_t get_max_tx_size();
    bool get_block_reward(size_t median_weight, size_t current_block_weight, uint64_t already_generated_coins, uint64_t &reward, uint8_t version);
    uint8_t get_account_address_checksum(const public_address_outer_blob& bl);
    uint8_t get_account_integrated_address_checksum(const public_integrated_address_outer_blob& bl);
  
    std::string get_account_address_as_str(
        network_type nettype
      , bool subaddress
      , const account_public_address& adr
      );
  
    std::string get_account_integrated_address_as_str(
        network_type nettype
      , const account_public_address& adr
      , const crypto::hash8& payment_id
      );
  
    bool get_account_address_from_str(
        address_parse_info& info
      , network_type nettype
      , const std::string& str
      );
  
    bool get_account_address_from_str_or_url(
        address_parse_info& info
      , network_type nettype
      , const std::string& str_or_url
      , std::function<std::string(const std::string&, const std::vector<std::string>&, bool)> dns_confirm = return_first_address
      );
  
    bool is_coinbase(const transaction& tx);
  
    bool operator ==(const cryptonote::transaction& a, const cryptonote::transaction& b);
    bool operator ==(const cryptonote::block& a, const cryptonote::block& b);
  }
  
  bool parse_hash256(const std::string &str_hash, crypto::hash& hash);
  
  