checkpoints.h

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// Copyrights(c) 2017-2019, The Electroneum Project
// Copyrights(c) 2014-2017, The Monero Project
//
// All rights reserved.
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// 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.
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// 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.
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// 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
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers

#pragma once
#include <map>
#include <vector>
#include "cryptonote_basic_impl.h"
#include "misc_log_ex.h"
#include "storages/portable_storage_template_helper.h" // epee json include

#define ADD_CHECKPOINT(h, hash)  CHECK_AND_ASSERT(add_checkpoint(h,  hash), false);
#define JSON_HASH_FILE_NAME "checkpoints.json"


namespace cryptonote
{
  class checkpoints
  {
  public:

    checkpoints();

    bool add_checkpoint(uint64_t height, const std::string& hash_str);

    bool is_in_checkpoint_zone(uint64_t height) const;

    bool check_block(uint64_t height, const crypto::hash& h, bool& is_a_checkpoint) const;

    bool check_block(uint64_t height, const crypto::hash& h) const;

    bool is_alternative_block_allowed(uint64_t blockchain_height, uint64_t block_height) const;

    uint64_t get_max_height() const;

    const std::map<uint64_t, crypto::hash>& get_points() const;

    bool check_for_conflicts(const checkpoints& other) const;

    bool init_default_checkpoints();

    bool load_new_checkpoints(const std::string json_hashfile_fullpath, bool testnet=false, bool dns=true);

    bool load_checkpoints_from_json(const std::string json_hashfile_fullpath);

    bool load_checkpoints_from_dns(bool testnet = false);

  private:


  struct t_hashline
  {
    uint64_t height; 
    std::string hash; 
        BEGIN_KV_SERIALIZE_MAP()
          KV_SERIALIZE(height)
          KV_SERIALIZE(hash)
        END_KV_SERIALIZE_MAP()
  };

  struct t_hash_json {
    std::vector<t_hashline> hashlines; 
        BEGIN_KV_SERIALIZE_MAP()
          KV_SERIALIZE(hashlines)
        END_KV_SERIALIZE_MAP()
  };

    std::map<uint64_t, crypto::hash> m_points; 

  };
}