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core: dynamic fee algorithm from ArticMine
The fee will vary based on the base reward and the current block size limit: fee = (R/R0) * (M0/M) * F0 R: base reward R0: reference base reward (10 monero) M: block size limit M0: minimum block size limit (60000) F0: 0.002 monero Starts applying at v4
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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 | |||
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#include "gtest/gtest.h" | |||
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#include "cryptonote_core/blockchain.h" | |||
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using namespace cryptonote; | |||
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namespace | |||
{ | |||
//-------------------------------------------------------------------------------------------------------------------- | |||
class fee : public ::testing::Test | |||
{ | |||
}; | |||
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TEST_F(fee, 10xmr) | |||
{ | |||
// CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 and lower are clamped | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(10000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2), 2000000000); | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(10000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 / 2), 2000000000); | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(10000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 / 100), 2000000000); | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(10000000000000, 1), 2000000000); | |||
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// higher is inverse proportional | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(10000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 2), 2000000000 / 2); | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(10000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 10), 2000000000 / 10); | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(10000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 1000), 2000000000 / 1000); | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(10000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 1000000ull), 2000000000 / 1000000); | |||
} | |||
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TEST_F(fee, 1xmr) | |||
{ | |||
// CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 and lower are clamped | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(1000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2), 200000000); | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(1000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 / 2), 200000000); | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(1000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 / 100), 200000000); | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(1000000000000, 1), 200000000); | |||
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// higher is inverse proportional | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(1000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 2), 200000000 / 2); | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(1000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 10), 200000000 / 10); | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(1000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 1000), 200000000 / 1000); | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(1000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 1000000ull), 200000000 / 1000000); | |||
} | |||
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TEST_F(fee, dot3xmr) | |||
{ | |||
// CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 and lower are clamped | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(300000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2), 60000000); | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(300000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 / 2), 60000000); | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(300000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 / 100), 60000000); | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(300000000000, 1), 60000000); | |||
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// higher is inverse proportional | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(300000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 2), 60000000 / 2); | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(300000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 10), 60000000 / 10); | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(300000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 1000), 60000000 / 1000); | |||
ASSERT_EQ(Blockchain::get_dynamic_per_kb_fee(300000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 1000000ull), 60000000 / 1000000); | |||
} | |||
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static bool is_more_or_less(double x, double y) | |||
{ | |||
return fabs(y - x) < 0.001; | |||
} | |||
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static const double MAX_MULTIPLIER = 166.f; | |||
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TEST_F(fee, double_at_full) | |||
{ | |||
static const uint64_t block_rewards[] = { | |||
20000000000000ull, // 20 monero | |||
13000000000000ull, | |||
1000000000000ull, | |||
600000000000ull, // .6 monero, minimum reward per block at 2min | |||
300000000000ull, // .3 monero, minimum reward per block at 1min | |||
}; | |||
static const uint64_t median_block_sizes[] = { | |||
CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2, | |||
CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 2, | |||
CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 10, | |||
CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 1000, | |||
CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 1000000ull | |||
}; | |||
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for (uint64_t block_reward: block_rewards) | |||
{ | |||
for (uint64_t median_block_size: median_block_sizes) | |||
{ | |||
ASSERT_TRUE(is_more_or_less(Blockchain::get_dynamic_per_kb_fee(block_reward, median_block_size) * (median_block_size / 1024.) * MAX_MULTIPLIER / (double)block_reward, 1.992 * 1000 / 1024)); | |||
} | |||
} | |||
} | |||
} |