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// Copyright (c) 2014-2020, The Monero 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
#include <cstddef>
#include <cstdint>
#include <fstream>
#include <iostream>
#include <vector>
#include <algorithm>
#include <stdexcept>
#include "misc_log_ex.h"
#include "cryptonote_config.h"
#include "cryptonote_basic/difficulty.h"
using namespace std;
#define DEFAULT_TEST_DIFFICULTY_TARGET 120
static int test_wide_difficulty(const char *filename)
{
std::vector<uint64_t> timestamps;
std::vector<cryptonote::difficulty_type> cumulative_difficulties;
fstream data(filename, fstream::in);
data.exceptions(fstream::badbit);
data.clear(data.rdstate());
uint64_t timestamp;
cryptonote::difficulty_type difficulty, cumulative_difficulty = 0;
size_t n = 0;
while (data >> timestamp >> difficulty) {
size_t begin, end;
if (n < DIFFICULTY_WINDOW + DIFFICULTY_LAG) {
begin = 0;
end = min(n, (size_t) DIFFICULTY_WINDOW);
} else {
end = n - DIFFICULTY_LAG;
begin = end - DIFFICULTY_WINDOW;
}
cryptonote::difficulty_type res = cryptonote::next_difficulty(
std::vector<uint64_t>(timestamps.begin() + begin, timestamps.begin() + end),
std::vector<cryptonote::difficulty_type>(cumulative_difficulties.begin() + begin, cumulative_difficulties.begin() + end), DEFAULT_TEST_DIFFICULTY_TARGET);
if (res != difficulty) {
cerr << "Wrong wide difficulty for block " << n << endl
<< "Expected: " << difficulty << endl
<< "Found: " << res << endl;
return 1;
}
timestamps.push_back(timestamp);
cumulative_difficulties.push_back(cumulative_difficulty += difficulty);
++n;
}
if (!data.eof()) {
data.clear(fstream::badbit);
}
return 0;
}
int main(int argc, char *argv[]) {
TRY_ENTRY();
if (argc < 2) {
cerr << "Wrong arguments" << endl;
return 1;
}
if (argc == 3 && strcmp(argv[1], "--wide") == 0)
{
return test_wide_difficulty(argv[2]);
}
vector<uint64_t> timestamps, cumulative_difficulties;
std::vector<cryptonote::difficulty_type> wide_cumulative_difficulties;
fstream data(argv[1], fstream::in);
data.exceptions(fstream::badbit);
data.clear(data.rdstate());
uint64_t timestamp;
uint64_t difficulty, cumulative_difficulty = 0;
cryptonote::difficulty_type wide_cumulative_difficulty = 0;
size_t n = 0;
while (data >> timestamp >> difficulty) {
size_t begin, end;
if (n < DIFFICULTY_WINDOW + DIFFICULTY_LAG) {
begin = 0;
end = min(n, (size_t) DIFFICULTY_WINDOW);
} else {
end = n - DIFFICULTY_LAG;
begin = end - DIFFICULTY_WINDOW;
}
uint64_t res = cryptonote::next_difficulty_64(
vector<uint64_t>(timestamps.begin() + begin, timestamps.begin() + end),
std::vector<uint64_t>(cumulative_difficulties.begin() + begin, cumulative_difficulties.begin() + end), DEFAULT_TEST_DIFFICULTY_TARGET);
if (res != difficulty) {
cerr << "Wrong difficulty for block " << n << endl
<< "Expected: " << difficulty << endl
<< "Found: " << res << endl;
return 1;
}
cryptonote::difficulty_type wide_res = cryptonote::next_difficulty(
std::vector<uint64_t>(timestamps.begin() + begin, timestamps.begin() + end),
std::vector<cryptonote::difficulty_type>(wide_cumulative_difficulties.begin() + begin, wide_cumulative_difficulties.begin() + end), DEFAULT_TEST_DIFFICULTY_TARGET);
if ((wide_res & 0xffffffffffffffff).convert_to<uint64_t>() != res) {
cerr << "Wrong wide difficulty for block " << n << endl
<< "Expected: " << res << endl
<< "Found: " << wide_res << endl;
return 1;
}
timestamps.push_back(timestamp);
cumulative_difficulties.push_back(cumulative_difficulty += difficulty);
wide_cumulative_difficulties.push_back(wide_cumulative_difficulty += difficulty);
++n;
}
if (!data.eof()) {
data.clear(fstream::badbit);
}
return 0;
CATCH_ENTRY_L0("main", 1);
}
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