2019-04-12 06:36:43 +02:00
|
|
|
// Copyright (c) 2014-2019, The Monero Project
|
2014-07-23 15:03:52 +02:00
|
|
|
//
|
|
|
|
// 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
|
2014-03-03 23:07:58 +01:00
|
|
|
|
|
|
|
#pragma once
|
|
|
|
|
|
|
|
#include <cstdint>
|
2020-06-22 21:27:42 +02:00
|
|
|
#include <cstddef>
|
2014-03-03 23:07:58 +01:00
|
|
|
#include <vector>
|
2020-08-31 09:45:33 +02:00
|
|
|
#include "cryptonote_config.h"
|
|
|
|
#include "common/util.h"
|
2014-03-03 23:07:58 +01:00
|
|
|
|
2020-06-22 21:27:42 +02:00
|
|
|
namespace crypto { struct hash; }
|
2014-03-03 23:07:58 +01:00
|
|
|
|
|
|
|
namespace cryptonote
|
|
|
|
{
|
|
|
|
typedef std::uint64_t difficulty_type;
|
|
|
|
|
2016-03-25 07:22:06 +01:00
|
|
|
/**
|
|
|
|
* @brief checks if a hash fits the given difficulty
|
|
|
|
*
|
2017-08-02 23:59:48 +02:00
|
|
|
* The hash passes if (hash * difficulty) < 2^256.
|
2016-03-25 07:22:06 +01:00
|
|
|
* Phrased differently, if (hash * difficulty) fits without overflow into
|
2017-08-02 23:59:48 +02:00
|
|
|
* the least significant 256 bits of the 320 bit multiplication result.
|
2016-03-25 07:22:06 +01:00
|
|
|
*
|
|
|
|
* @param hash the hash to check
|
|
|
|
* @param difficulty the difficulty to check against
|
|
|
|
*
|
|
|
|
* @return true if valid, else false
|
|
|
|
*/
|
2014-03-03 23:07:58 +01:00
|
|
|
bool check_hash(const crypto::hash &hash, difficulty_type difficulty);
|
2018-11-08 08:48:50 +01:00
|
|
|
|
2020-09-02 02:22:51 +02:00
|
|
|
// Add one timestamp and difficulty to the input arrays, trimming down the
|
|
|
|
// array if necessary for usage in next_difficulty_v2.
|
|
|
|
void add_timestamp_and_difficulty(cryptonote::network_type nettype,
|
|
|
|
uint64_t chain_height,
|
|
|
|
std::vector<uint64_t> ×tamps,
|
|
|
|
std::vector<difficulty_type> &difficulties,
|
|
|
|
uint64_t timestamp,
|
|
|
|
uint64_t cumulative_difficulty);
|
|
|
|
|
|
|
|
|
2020-09-11 21:54:53 +02:00
|
|
|
constexpr difficulty_type PULSE_FIXED_DIFFICULTY = 1'000'000;
|
2020-08-27 09:43:08 +02:00
|
|
|
enum struct difficulty_calc_mode
|
|
|
|
{
|
|
|
|
use_old_lwma,
|
|
|
|
hf12_override,
|
2020-10-12 09:06:36 +02:00
|
|
|
hf16_override,
|
2020-08-31 09:45:33 +02:00
|
|
|
normal,
|
2020-08-27 09:43:08 +02:00
|
|
|
};
|
|
|
|
|
2021-06-18 01:06:51 +02:00
|
|
|
difficulty_calc_mode difficulty_mode(network_type nettype, uint64_t height);
|
2020-08-27 09:43:08 +02:00
|
|
|
|
|
|
|
difficulty_type next_difficulty_v2(std::vector<std::uint64_t> timestamps,
|
|
|
|
std::vector<difficulty_type> cumulative_difficulties,
|
|
|
|
size_t target_second,
|
|
|
|
difficulty_calc_mode mode);
|
2014-03-03 23:07:58 +01:00
|
|
|
}
|