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monero/tests/unit_tests/block_reward.cpp

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// Copyright (c) 2014-2016, 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 "gtest/gtest.h"
#include "cryptonote_core/cryptonote_basic_impl.h"
using namespace cryptonote;
namespace
{
//--------------------------------------------------------------------------------------------------------------------
class block_reward_and_already_generated_coins : public ::testing::Test
{
protected:
static const size_t current_block_size = CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1 / 2;
bool m_block_not_too_big;
uint64_t m_block_reward;
};
#define TEST_ALREADY_GENERATED_COINS(already_generated_coins, expected_reward) \
m_block_not_too_big = get_block_reward(0, current_block_size, already_generated_coins, m_block_reward,1); \
ASSERT_TRUE(m_block_not_too_big); \
ASSERT_EQ(m_block_reward, expected_reward);
TEST_F(block_reward_and_already_generated_coins, handles_first_values)
{
// 17592186044415 from neozaru, confirmed by fluffypony
TEST_ALREADY_GENERATED_COINS(0, UINT64_C(17592186044415));
TEST_ALREADY_GENERATED_COINS(m_block_reward, UINT64_C(17592169267200));
TEST_ALREADY_GENERATED_COINS(UINT64_C(2756434948434199641), UINT64_C(14963444829249));
}
TEST_F(block_reward_and_already_generated_coins, correctly_steps_from_2_to_1)
{
TEST_ALREADY_GENERATED_COINS(MONEY_SUPPLY - ((2 << 20) + 1), FINAL_SUBSIDY_PER_MINUTE);
TEST_ALREADY_GENERATED_COINS(MONEY_SUPPLY - (2 << 20) , FINAL_SUBSIDY_PER_MINUTE);
TEST_ALREADY_GENERATED_COINS(MONEY_SUPPLY - ((2 << 20) - 1), FINAL_SUBSIDY_PER_MINUTE);
}
TEST_F(block_reward_and_already_generated_coins, handles_max)
{
TEST_ALREADY_GENERATED_COINS(MONEY_SUPPLY - ((1 << 20) + 1), FINAL_SUBSIDY_PER_MINUTE);
TEST_ALREADY_GENERATED_COINS(MONEY_SUPPLY - (1 << 20) , FINAL_SUBSIDY_PER_MINUTE);
TEST_ALREADY_GENERATED_COINS(MONEY_SUPPLY - ((1 << 20) - 1), FINAL_SUBSIDY_PER_MINUTE);
}
//--------------------------------------------------------------------------------------------------------------------
class block_reward_and_current_block_size : public ::testing::Test
{
protected:
virtual void SetUp()
{
m_block_not_too_big = get_block_reward(0, 0, already_generated_coins, m_standard_block_reward, 1);
ASSERT_TRUE(m_block_not_too_big);
ASSERT_LT(CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1, m_standard_block_reward);
}
void do_test(size_t median_block_size, size_t current_block_size)
{
m_block_not_too_big = get_block_reward(median_block_size, current_block_size, already_generated_coins, m_block_reward, 1);
}
static const uint64_t already_generated_coins = 0;
bool m_block_not_too_big;
uint64_t m_block_reward;
uint64_t m_standard_block_reward;
};
TEST_F(block_reward_and_current_block_size, handles_block_size_less_relevance_level)
{
do_test(0, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1 - 1);
ASSERT_TRUE(m_block_not_too_big);
ASSERT_EQ(m_block_reward, m_standard_block_reward);
}
TEST_F(block_reward_and_current_block_size, handles_block_size_eq_relevance_level)
{
do_test(0, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1);
ASSERT_TRUE(m_block_not_too_big);
ASSERT_EQ(m_block_reward, m_standard_block_reward);
}
TEST_F(block_reward_and_current_block_size, handles_block_size_gt_relevance_level)
{
do_test(0, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1 + 1);
ASSERT_TRUE(m_block_not_too_big);
ASSERT_LT(m_block_reward, m_standard_block_reward);
}
TEST_F(block_reward_and_current_block_size, handles_block_size_less_2_relevance_level)
{
do_test(0, 2 * CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1 - 1);
ASSERT_TRUE(m_block_not_too_big);
ASSERT_LT(m_block_reward, m_standard_block_reward);
ASSERT_LT(0, m_block_reward);
}
TEST_F(block_reward_and_current_block_size, handles_block_size_eq_2_relevance_level)
{
do_test(0, 2 * CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1);
ASSERT_TRUE(m_block_not_too_big);
ASSERT_EQ(0, m_block_reward);
}
TEST_F(block_reward_and_current_block_size, handles_block_size_gt_2_relevance_level)
{
do_test(0, 2 * CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1 + 1);
ASSERT_FALSE(m_block_not_too_big);
}
#ifdef __x86_64__ // For 64-bit systems only, because block size is limited to size_t.
TEST_F(block_reward_and_current_block_size, fails_on_huge_median_size)
{
#if !defined(NDEBUG)
size_t huge_size = std::numeric_limits<uint32_t>::max() + UINT64_C(2);
ASSERT_DEATH(do_test(huge_size, huge_size + 1), "");
#endif
}
TEST_F(block_reward_and_current_block_size, fails_on_huge_block_size)
{
#if !defined(NDEBUG)
size_t huge_size = std::numeric_limits<uint32_t>::max() + UINT64_C(2);
ASSERT_DEATH(do_test(huge_size - 2, huge_size), "");
#endif
}
#endif // __x86_64__
//--------------------------------------------------------------------------------------------------------------------
class block_reward_and_last_block_sizes : public ::testing::Test
{
protected:
virtual void SetUp()
{
m_last_block_sizes.push_back(3 * CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1);
m_last_block_sizes.push_back(5 * CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1);
m_last_block_sizes.push_back(7 * CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1);
m_last_block_sizes.push_back(11 * CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1);
m_last_block_sizes.push_back(13 * CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1);
m_last_block_sizes_median = 7 * CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1;
m_block_not_too_big = get_block_reward(epee::misc_utils::median(m_last_block_sizes), 0, already_generated_coins, m_standard_block_reward, 1);
ASSERT_TRUE(m_block_not_too_big);
ASSERT_LT(CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1, m_standard_block_reward);
}
void do_test(size_t current_block_size)
{
m_block_not_too_big = get_block_reward(epee::misc_utils::median(m_last_block_sizes), current_block_size, already_generated_coins, m_block_reward, 1);
}
static const uint64_t already_generated_coins = 0;
std::vector<size_t> m_last_block_sizes;
uint64_t m_last_block_sizes_median;
bool m_block_not_too_big;
uint64_t m_block_reward;
uint64_t m_standard_block_reward;
};
TEST_F(block_reward_and_last_block_sizes, handles_block_size_less_median)
{
do_test(m_last_block_sizes_median - 1);
ASSERT_TRUE(m_block_not_too_big);
ASSERT_EQ(m_block_reward, m_standard_block_reward);
}
TEST_F(block_reward_and_last_block_sizes, handles_block_size_eq_median)
{
do_test(m_last_block_sizes_median);
ASSERT_TRUE(m_block_not_too_big);
ASSERT_EQ(m_block_reward, m_standard_block_reward);
}
TEST_F(block_reward_and_last_block_sizes, handles_block_size_gt_median)
{
do_test(m_last_block_sizes_median + 1);
ASSERT_TRUE(m_block_not_too_big);
ASSERT_LT(m_block_reward, m_standard_block_reward);
}
TEST_F(block_reward_and_last_block_sizes, handles_block_size_less_2_medians)
{
do_test(2 * m_last_block_sizes_median - 1);
ASSERT_TRUE(m_block_not_too_big);
ASSERT_LT(m_block_reward, m_standard_block_reward);
ASSERT_LT(0, m_block_reward);
}
TEST_F(block_reward_and_last_block_sizes, handles_block_size_eq_2_medians)
{
do_test(2 * m_last_block_sizes_median);
ASSERT_TRUE(m_block_not_too_big);
ASSERT_EQ(0, m_block_reward);
}
TEST_F(block_reward_and_last_block_sizes, handles_block_size_gt_2_medians)
{
do_test(2 * m_last_block_sizes_median + 1);
ASSERT_FALSE(m_block_not_too_big);
}
TEST_F(block_reward_and_last_block_sizes, calculates_correctly)
{
ASSERT_EQ(0, m_last_block_sizes_median % 8);
do_test(m_last_block_sizes_median * 9 / 8);
ASSERT_TRUE(m_block_not_too_big);
ASSERT_EQ(m_block_reward, m_standard_block_reward * 63 / 64);
// 3/2 = 12/8
do_test(m_last_block_sizes_median * 3 / 2);
ASSERT_TRUE(m_block_not_too_big);
ASSERT_EQ(m_block_reward, m_standard_block_reward * 3 / 4);
do_test(m_last_block_sizes_median * 15 / 8);
ASSERT_TRUE(m_block_not_too_big);
ASSERT_EQ(m_block_reward, m_standard_block_reward * 15 / 64);
}
}
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