2017-02-21 17:38:18 +00:00
|
|
|
// Copyright (c) 2014-2017, The Monero Project
|
2016-03-25 06:22:06 +00:00
|
|
|
//
|
2014-07-23 13:03:52 +00:00
|
|
|
// All rights reserved.
|
2016-03-25 06:22:06 +00:00
|
|
|
//
|
2014-07-23 13:03:52 +00:00
|
|
|
// Redistribution and use in source and binary forms, with or without modification, are
|
|
|
|
// permitted provided that the following conditions are met:
|
2016-03-25 06:22:06 +00:00
|
|
|
//
|
2014-07-23 13:03:52 +00:00
|
|
|
// 1. Redistributions of source code must retain the above copyright notice, this list of
|
|
|
|
// conditions and the following disclaimer.
|
2016-03-25 06:22:06 +00:00
|
|
|
//
|
2014-07-23 13:03:52 +00:00
|
|
|
// 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.
|
2016-03-25 06:22:06 +00:00
|
|
|
//
|
2014-07-23 13:03:52 +00:00
|
|
|
// 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.
|
2016-03-25 06:22:06 +00:00
|
|
|
//
|
2014-07-23 13:03:52 +00:00
|
|
|
// 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.
|
2016-03-25 06:22:06 +00:00
|
|
|
//
|
2014-07-23 13:03:52 +00:00
|
|
|
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
|
2014-03-03 22:07:58 +00:00
|
|
|
|
|
|
|
#pragma once
|
|
|
|
#include <map>
|
2014-09-25 05:15:28 +00:00
|
|
|
#include <vector>
|
2016-03-25 06:22:06 +00:00
|
|
|
#include "misc_log_ex.h"
|
2017-09-10 16:35:59 +00:00
|
|
|
#include "crypto/hash.h"
|
2016-03-25 06:22:06 +00:00
|
|
|
|
|
|
|
#define ADD_CHECKPOINT(h, hash) CHECK_AND_ASSERT(add_checkpoint(h, hash), false);
|
|
|
|
#define JSON_HASH_FILE_NAME "checkpoints.json"
|
2014-03-03 22:07:58 +00:00
|
|
|
|
|
|
|
|
|
|
|
namespace cryptonote
|
|
|
|
{
|
2016-03-25 06:22:06 +00:00
|
|
|
/**
|
|
|
|
* @brief A container for blockchain checkpoints
|
|
|
|
*
|
|
|
|
* A checkpoint is a pre-defined hash for the block at a given height.
|
|
|
|
* Some of these are compiled-in, while others can be loaded at runtime
|
|
|
|
* either from a json file or via DNS from a checkpoint-hosting server.
|
|
|
|
*/
|
2014-03-03 22:07:58 +00:00
|
|
|
class checkpoints
|
|
|
|
{
|
|
|
|
public:
|
2016-03-25 06:22:06 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief default constructor
|
|
|
|
*/
|
2014-03-03 22:07:58 +00:00
|
|
|
checkpoints();
|
2016-03-25 06:22:06 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief adds a checkpoint to the container
|
|
|
|
*
|
|
|
|
* @param height the height of the block the checkpoint is for
|
|
|
|
* @param hash_str the hash of the block, as a string
|
|
|
|
*
|
|
|
|
* @return false if parsing the hash fails, or if the height is a duplicate
|
|
|
|
* AND the existing checkpoint hash does not match the new one,
|
|
|
|
* otherwise returns true
|
|
|
|
*/
|
2014-03-03 22:07:58 +00:00
|
|
|
bool add_checkpoint(uint64_t height, const std::string& hash_str);
|
2016-03-25 06:22:06 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief checks if there is a checkpoint in the future
|
|
|
|
*
|
|
|
|
* This function checks if the height passed is lower than the highest
|
|
|
|
* checkpoint.
|
|
|
|
*
|
|
|
|
* @param height the height to check against
|
|
|
|
*
|
|
|
|
* @return false if no checkpoints, otherwise returns whether or not
|
|
|
|
* the height passed is lower than the highest checkpoint.
|
|
|
|
*/
|
2014-03-03 22:07:58 +00:00
|
|
|
bool is_in_checkpoint_zone(uint64_t height) const;
|
2016-03-25 06:22:06 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief checks if the given height and hash agree with the checkpoints
|
|
|
|
*
|
|
|
|
* This function checks if the given height and hash exist in the
|
|
|
|
* checkpoints container. If so, it returns whether or not the passed
|
|
|
|
* parameters match the stored values.
|
|
|
|
*
|
|
|
|
* @param height the height to be checked
|
|
|
|
* @param h the hash to be checked
|
|
|
|
* @param is_a_checkpoint return-by-reference if there is a checkpoint at the given height
|
|
|
|
*
|
|
|
|
* @return true if there is no checkpoint at the given height,
|
|
|
|
* true if the passed parameters match the stored checkpoint,
|
|
|
|
* false otherwise
|
|
|
|
*/
|
2016-03-25 06:42:42 +00:00
|
|
|
bool check_block(uint64_t height, const crypto::hash& h, bool& is_a_checkpoint) const;
|
2016-03-25 06:22:06 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* @overload
|
|
|
|
*/
|
|
|
|
bool check_block(uint64_t height, const crypto::hash& h) const;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief checks if alternate chain blocks should be kept for a given height
|
|
|
|
*
|
|
|
|
* this basically says if the blockchain is smaller than the first
|
|
|
|
* checkpoint then alternate blocks are allowed. Alternatively, if the
|
|
|
|
* last checkpoint *before* the end of the current chain is also before
|
|
|
|
* the block to be added, then this is fine.
|
|
|
|
*
|
|
|
|
* @param blockchain_height the current blockchain height
|
|
|
|
* @param block_height the height of the block to be added as alternate
|
|
|
|
*
|
|
|
|
* @return true if alternate blocks are allowed given the parameters,
|
|
|
|
* otherwise false
|
|
|
|
*/
|
2014-05-25 17:06:40 +00:00
|
|
|
bool is_alternative_block_allowed(uint64_t blockchain_height, uint64_t block_height) const;
|
2016-03-25 06:22:06 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief gets the highest checkpoint height
|
|
|
|
*
|
|
|
|
* @return the height of the highest checkpoint
|
|
|
|
*/
|
2014-12-06 22:46:51 +00:00
|
|
|
uint64_t get_max_height() const;
|
2016-03-25 06:22:06 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief gets the checkpoints container
|
|
|
|
*
|
|
|
|
* @return a const reference to the checkpoints container
|
|
|
|
*/
|
2014-12-06 22:46:51 +00:00
|
|
|
const std::map<uint64_t, crypto::hash>& get_points() const;
|
2016-03-25 06:22:06 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief checks if our checkpoints container conflicts with another
|
|
|
|
*
|
|
|
|
* A conflict refers to a case where both checkpoint sets have a checkpoint
|
|
|
|
* for a specific height but their hashes for that height do not match.
|
|
|
|
*
|
|
|
|
* @param other the other checkpoints instance to check against
|
|
|
|
*
|
|
|
|
* @return false if any conflict is found, otherwise true
|
|
|
|
*/
|
2014-12-06 22:46:51 +00:00
|
|
|
bool check_for_conflicts(const checkpoints& other) const;
|
2016-03-25 06:22:06 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief loads the default main chain checkpoints
|
2017-09-11 15:32:46 +00:00
|
|
|
* @param testnet whether to load testnet checkpoints or mainnet
|
2016-03-25 06:22:06 +00:00
|
|
|
*
|
|
|
|
* @return true unless adding a checkpoint fails
|
|
|
|
*/
|
2017-09-11 15:32:46 +00:00
|
|
|
bool init_default_checkpoints(bool testnet);
|
2016-03-25 06:22:06 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief load new checkpoints
|
|
|
|
*
|
|
|
|
* Loads new checkpoints from the specified json file, as well as
|
|
|
|
* (optionally) from DNS.
|
|
|
|
*
|
|
|
|
* @param json_hashfile_fullpath path to the json checkpoints file
|
|
|
|
* @param testnet whether to load testnet checkpoints or mainnet
|
|
|
|
* @param dns whether or not to load DNS checkpoints
|
|
|
|
*
|
|
|
|
* @return true if loading successful and no conflicts
|
|
|
|
*/
|
2017-12-10 15:05:48 +00:00
|
|
|
bool load_new_checkpoints(const std::string &json_hashfile_fullpath, bool testnet=false, bool dns=true);
|
2016-03-25 06:22:06 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief load new checkpoints from json
|
|
|
|
*
|
|
|
|
* @param json_hashfile_fullpath path to the json checkpoints file
|
|
|
|
*
|
|
|
|
* @return true if loading successful and no conflicts
|
|
|
|
*/
|
2017-12-10 15:05:48 +00:00
|
|
|
bool load_checkpoints_from_json(const std::string &json_hashfile_fullpath);
|
2016-03-25 06:22:06 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* @brief load new checkpoints from DNS
|
|
|
|
*
|
|
|
|
* @param testnet whether to load testnet checkpoints or mainnet
|
|
|
|
*
|
|
|
|
* @return true if loading successful and no conflicts
|
|
|
|
*/
|
|
|
|
bool load_checkpoints_from_dns(bool testnet = false);
|
|
|
|
|
2014-03-03 22:07:58 +00:00
|
|
|
private:
|
2016-03-25 06:22:06 +00:00
|
|
|
std::map<uint64_t, crypto::hash> m_points; //!< the checkpoints container
|
2014-03-03 22:07:58 +00:00
|
|
|
};
|
2017-11-25 22:25:05 +00:00
|
|
|
|
2014-03-03 22:07:58 +00:00
|
|
|
}
|