wownero/tests/unit_tests/difficulty.cpp
2022-03-04 06:59:20 +01:00

75 lines
3.3 KiB
C++

// Copyright (c) 2019-2022, 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
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//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// 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
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#include "gtest/gtest.h"
#include "int-util.h"
#include "cryptonote_basic/difficulty.h"
static cryptonote::difficulty_type MKDIFF(uint64_t high, uint64_t low)
{
cryptonote::difficulty_type d = high;
d = (d << 64) | low;
return d;
}
static crypto::hash MKHASH(uint64_t high, uint64_t low)
{
cryptonote::difficulty_type hash_target = high;
hash_target = (hash_target << 64) | low;
boost::multiprecision::uint256_t hash_value = std::numeric_limits<boost::multiprecision::uint256_t>::max() / hash_target;
crypto::hash h;
uint64_t val;
val = (hash_value & 0xffffffffffffffff).convert_to<uint64_t>();
((uint64_t*)&h)[0] = SWAP64LE(val);
hash_value >>= 64;
val = (hash_value & 0xffffffffffffffff).convert_to<uint64_t>();
((uint64_t*)&h)[1] = SWAP64LE(val);
hash_value >>= 64;
val = (hash_value & 0xffffffffffffffff).convert_to<uint64_t>();
((uint64_t*)&h)[2] = SWAP64LE(val);
hash_value >>= 64;
val = (hash_value & 0xffffffffffffffff).convert_to<uint64_t>();
((uint64_t*)&h)[3] = SWAP64LE(val);
return h;
}
TEST(difficulty, check_hash)
{
ASSERT_TRUE(cryptonote::check_hash(MKHASH(0, 1), MKDIFF(0, 1)));
ASSERT_FALSE(cryptonote::check_hash(MKHASH(0, 1), MKDIFF(0, 2)));
ASSERT_TRUE(cryptonote::check_hash(MKHASH(0, 0xffffffffffffffff), MKDIFF(0, 0xffffffffffffffff)));
ASSERT_FALSE(cryptonote::check_hash(MKHASH(0, 0xffffffffffffffff), MKDIFF(1, 0)));
ASSERT_TRUE(cryptonote::check_hash(MKHASH(1, 1), MKDIFF(1, 1)));
ASSERT_FALSE(cryptonote::check_hash(MKHASH(1, 1), MKDIFF(1, 2)));
ASSERT_TRUE(cryptonote::check_hash(MKHASH(0xffffffffffffffff, 1), MKDIFF(0xffffffffffffffff, 1)));
ASSERT_FALSE(cryptonote::check_hash(MKHASH(0xffffffffffffffff, 1), MKDIFF(0xffffffffffffffff, 2)));
}