forked from townforge/townforge
137 lines
7.1 KiB
C++
137 lines
7.1 KiB
C++
// Copyright (c) 2014-2019, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// 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
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{
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static uint64_t clamp_fee(uint64_t fee)
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{
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static uint64_t mask = 0;
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if (mask == 0)
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{
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mask = 1;
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for (size_t n = PER_KB_FEE_QUANTIZATION_DECIMALS; n < CRYPTONOTE_DISPLAY_DECIMAL_POINT; ++n)
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mask *= 10;
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}
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return (fee + mask - 1) / mask * mask;
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}
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//--------------------------------------------------------------------------------------------------------------------
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class fee : public ::testing::Test
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{
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};
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// try with blocks ~ 1GB. Passing 2 GB will break on 32 bit systems
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TEST_F(fee, 10xmr)
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{
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// CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 and lower are clamped
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(10000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2, 3), clamp_fee(2000000000));
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(10000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 / 2, 3), clamp_fee(2000000000));
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(10000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 / 100, 3), clamp_fee(2000000000));
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(10000000000000, 1, 3), 2000000000);
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// higher is inverse proportional
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(10000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 2, 3), clamp_fee(2000000000 / 2));
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(10000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 10, 3), clamp_fee(2000000000 / 10));
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(10000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 1000, 3), clamp_fee(2000000000 / 1000));
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(10000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 20000ull, 3), clamp_fee(2000000000 / 20000));
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}
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TEST_F(fee, 1xmr)
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{
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// CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 and lower are clamped
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(1000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2, 3), clamp_fee(200000000));
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(1000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 / 2, 3), clamp_fee(200000000));
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(1000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 / 100, 3), clamp_fee(200000000));
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(1000000000000, 1, 3), 200000000);
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// higher is inverse proportional
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(1000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 2, 3), clamp_fee(200000000 / 2));
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(1000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 10, 3), clamp_fee(200000000 / 10));
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(1000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 1000, 3), clamp_fee(200000000 / 1000));
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(1000000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 20000ull, 3), clamp_fee(200000000 / 20000));
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}
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TEST_F(fee, dot3xmr)
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{
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// CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 and lower are clamped
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(300000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2, 3), clamp_fee(60000000));
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(300000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 / 2, 3), clamp_fee(60000000));
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(300000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 / 100, 3), clamp_fee(60000000));
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(300000000000, 1, 3), 60000000);
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// higher is inverse proportional
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(300000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 2, 3), clamp_fee(60000000 / 2));
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(300000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 10, 3), clamp_fee(60000000 / 10));
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(300000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 1000, 3), clamp_fee(60000000 / 1000));
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ASSERT_EQ(Blockchain::get_dynamic_base_fee(300000000000, CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 20000ull, 3), clamp_fee(60000000 / 20000));
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}
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static bool is_more_or_less(double x, double y)
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{
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return fabs(y - x) < 0.001;
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}
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static const double MAX_MULTIPLIER = 166.f;
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TEST_F(fee, double_at_full)
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{
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static const uint64_t block_rewards[] = {
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20000000000000ull, // 20 monero
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13000000000000ull,
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1000000000000ull,
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600000000000ull, // .6 monero, minimum reward per block at 2min
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300000000000ull, // .3 monero, minimum reward per block at 1min
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};
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static const uint64_t median_block_weights[] = {
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CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2,
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CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 2,
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CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 10,
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CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 1000,
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// with clamping, the formula does not hold for such large blocks and small fees
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// CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 20000ull
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};
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for (uint64_t block_reward: block_rewards)
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{
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for (uint64_t median_block_weight: median_block_weights)
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{
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ASSERT_TRUE(is_more_or_less(Blockchain::get_dynamic_base_fee(block_reward, median_block_weight, 3) * (median_block_weight / 1024.) * MAX_MULTIPLIER / (double)block_reward, 1.992 * 1000 / 1024));
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}
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}
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}
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}
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