wownero/tests/unit_tests/output_distribution.cpp

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// Copyright (c) 2018, 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,
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#include "gtest/gtest.h"
#include "misc_log_ex.h"
#include "rpc/rpc_handler.h"
#include "blockchain_db/blockchain_db.h"
#include "cryptonote_core/cryptonote_core.h"
#include "cryptonote_core/tx_pool.h"
#include "cryptonote_core/blockchain.h"
ArticMine's new block weight algorithm This curbs runaway growth while still allowing substantial spikes in block weight Original specification from ArticMine: here is the scaling proposal Define: LongTermBlockWeight Before fork: LongTermBlockWeight = BlockWeight At or after fork: LongTermBlockWeight = min(BlockWeight, 1.4*LongTermEffectiveMedianBlockWeight) Note: To avoid possible consensus issues over rounding the LongTermBlockWeight for a given block should be calculated to the nearest byte, and stored as a integer in the block itself. The stored LongTermBlockWeight is then used for future calculations of the LongTermEffectiveMedianBlockWeight and not recalculated each time. Define: LongTermEffectiveMedianBlockWeight LongTermEffectiveMedianBlockWeight = max(300000, MedianOverPrevious100000Blocks(LongTermBlockWeight)) Change Definition of EffectiveMedianBlockWeight From (current definition) EffectiveMedianBlockWeight = max(300000, MedianOverPrevious100Blocks(BlockWeight)) To (proposed definition) EffectiveMedianBlockWeight = min(max(300000, MedianOverPrevious100Blocks(BlockWeight)), 50*LongTermEffectiveMedianBlockWeight) Notes: 1) There are no other changes to the existing penalty formula, median calculation, fees etc. 2) There is the requirement to store the LongTermBlockWeight of a block unencrypted in the block itself. This is to avoid possible consensus issues over rounding and also to prevent the calculations from becoming unwieldy as we move away from the fork. 3) When the EffectiveMedianBlockWeight cap is reached it is still possible to mine blocks up to 2x the EffectiveMedianBlockWeight by paying the corresponding penalty. Note: the long term block weight is stored in the database, but not in the actual block itself, since it requires recalculating anyway for verification.
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#include "blockchain_db/testdb.h"
static const uint64_t test_distribution[32] = {
0, 0, 0, 0, 0, 1, 5, 1, 4, 0, 0, 1, 0, 1, 2, 3, 1, 0, 2, 0, 1, 3, 8, 1, 3, 5, 7, 1, 5, 0, 2, 3
};
static const size_t test_distribution_size = sizeof(test_distribution) / sizeof(test_distribution[0]);
namespace
{
ArticMine's new block weight algorithm This curbs runaway growth while still allowing substantial spikes in block weight Original specification from ArticMine: here is the scaling proposal Define: LongTermBlockWeight Before fork: LongTermBlockWeight = BlockWeight At or after fork: LongTermBlockWeight = min(BlockWeight, 1.4*LongTermEffectiveMedianBlockWeight) Note: To avoid possible consensus issues over rounding the LongTermBlockWeight for a given block should be calculated to the nearest byte, and stored as a integer in the block itself. The stored LongTermBlockWeight is then used for future calculations of the LongTermEffectiveMedianBlockWeight and not recalculated each time. Define: LongTermEffectiveMedianBlockWeight LongTermEffectiveMedianBlockWeight = max(300000, MedianOverPrevious100000Blocks(LongTermBlockWeight)) Change Definition of EffectiveMedianBlockWeight From (current definition) EffectiveMedianBlockWeight = max(300000, MedianOverPrevious100Blocks(BlockWeight)) To (proposed definition) EffectiveMedianBlockWeight = min(max(300000, MedianOverPrevious100Blocks(BlockWeight)), 50*LongTermEffectiveMedianBlockWeight) Notes: 1) There are no other changes to the existing penalty formula, median calculation, fees etc. 2) There is the requirement to store the LongTermBlockWeight of a block unencrypted in the block itself. This is to avoid possible consensus issues over rounding and also to prevent the calculations from becoming unwieldy as we move away from the fork. 3) When the EffectiveMedianBlockWeight cap is reached it is still possible to mine blocks up to 2x the EffectiveMedianBlockWeight by paying the corresponding penalty. Note: the long term block weight is stored in the database, but not in the actual block itself, since it requires recalculating anyway for verification.
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class TestDB: public cryptonote::BaseTestDB
{
public:
TestDB(size_t bc_height = test_distribution_size): blockchain_height(bc_height) { m_open = true; }
virtual uint64_t height() const override { return blockchain_height; }
std::vector<uint64_t> get_block_cumulative_rct_outputs(const std::vector<uint64_t> &heights) const override
{
std::vector<uint64_t> d;
for (uint64_t h: heights)
{
uint64_t c = 0;
for (uint64_t i = 0; i <= h; ++i)
c += test_distribution[i];
d.push_back(c);
}
return d;
}
std::vector<uint64_t> get_block_weights(uint64_t start_offset, size_t count) const override
{
std::vector<uint64_t> weights;
while (count--) weights.push_back(1);
return weights;
}
uint64_t blockchain_height;
};
}
bool get_output_distribution(uint64_t amount, uint64_t from, uint64_t to, uint64_t &start_height, std::vector<uint64_t> &distribution, uint64_t &base)
{
std::unique_ptr<cryptonote::Blockchain> bc;
cryptonote::tx_memory_pool txpool(*bc);
bc.reset(new cryptonote::Blockchain(txpool));
struct get_test_options {
const std::pair<uint8_t, uint64_t> hard_forks[2];
const cryptonote::test_options test_options = {
hard_forks
};
get_test_options():hard_forks{std::make_pair((uint8_t)1, (uint64_t)0), std::make_pair((uint8_t)0, (uint64_t)0)}{}
} opts;
cryptonote::Blockchain *blockchain = bc.get();
bool r = blockchain->init(new TestDB(test_distribution_size), cryptonote::FAKECHAIN, true, &opts.test_options, 0, NULL);
return r && bc->get_output_distribution(amount, from, to, start_height, distribution, base);
}
crypto::hash get_block_hash(uint64_t height)
{
crypto::hash hash = crypto::null_hash;
*((uint64_t*)&hash) = height;
return hash;
}
TEST(output_distribution, extend)
{
boost::optional<cryptonote::rpc::output_distribution_data> res;
res = cryptonote::rpc::RpcHandler::get_output_distribution(::get_output_distribution, 0, 28, 29, ::get_block_hash, false, test_distribution_size);
ASSERT_TRUE(res != boost::none);
ASSERT_EQ(res->distribution.size(), 2);
ASSERT_EQ(res->distribution, std::vector<uint64_t>({5, 0}));
res = cryptonote::rpc::RpcHandler::get_output_distribution(::get_output_distribution, 0, 28, 29, ::get_block_hash, true, test_distribution_size);
ASSERT_TRUE(res != boost::none);
ASSERT_EQ(res->distribution.size(), 2);
ASSERT_EQ(res->distribution, std::vector<uint64_t>({55, 55}));
res = cryptonote::rpc::RpcHandler::get_output_distribution(::get_output_distribution, 0, 28, 30, ::get_block_hash, false, test_distribution_size);
ASSERT_TRUE(res != boost::none);
ASSERT_EQ(res->distribution.size(), 3);
ASSERT_EQ(res->distribution, std::vector<uint64_t>({5, 0, 2}));
res = cryptonote::rpc::RpcHandler::get_output_distribution(::get_output_distribution, 0, 28, 30, ::get_block_hash, true, test_distribution_size);
ASSERT_TRUE(res != boost::none);
ASSERT_EQ(res->distribution.size(), 3);
ASSERT_EQ(res->distribution, std::vector<uint64_t>({55, 55, 57}));
res = cryptonote::rpc::RpcHandler::get_output_distribution(::get_output_distribution, 0, 28, 31, ::get_block_hash, false, test_distribution_size);
ASSERT_TRUE(res != boost::none);
ASSERT_EQ(res->distribution.size(), 4);
ASSERT_EQ(res->distribution, std::vector<uint64_t>({5, 0, 2, 3}));
res = cryptonote::rpc::RpcHandler::get_output_distribution(::get_output_distribution, 0, 28, 31, ::get_block_hash, true, test_distribution_size);
ASSERT_TRUE(res != boost::none);
ASSERT_EQ(res->distribution.size(), 4);
ASSERT_EQ(res->distribution, std::vector<uint64_t>({55, 55, 57, 60}));
}
TEST(output_distribution, one)
{
boost::optional<cryptonote::rpc::output_distribution_data> res;
res = cryptonote::rpc::RpcHandler::get_output_distribution(::get_output_distribution, 0, 0, 0, ::get_block_hash, false, test_distribution_size);
ASSERT_TRUE(res != boost::none);
ASSERT_EQ(res->distribution.size(), 1);
ASSERT_EQ(res->distribution.back(), 0);
}
TEST(output_distribution, full_cumulative)
{
boost::optional<cryptonote::rpc::output_distribution_data> res;
res = cryptonote::rpc::RpcHandler::get_output_distribution(::get_output_distribution, 0, 0, 31, ::get_block_hash, true, test_distribution_size);
ASSERT_TRUE(res != boost::none);
ASSERT_EQ(res->distribution.size(), 32);
ASSERT_EQ(res->distribution.back(), 60);
}
TEST(output_distribution, full_noncumulative)
{
boost::optional<cryptonote::rpc::output_distribution_data> res;
res = cryptonote::rpc::RpcHandler::get_output_distribution(::get_output_distribution, 0, 0, 31, ::get_block_hash, false, test_distribution_size);
ASSERT_TRUE(res != boost::none);
ASSERT_EQ(res->distribution.size(), 32);
for (size_t i = 0; i < 32; ++i)
ASSERT_EQ(res->distribution[i], test_distribution[i]);
}
TEST(output_distribution, part_cumulative)
{
boost::optional<cryptonote::rpc::output_distribution_data> res;
res = cryptonote::rpc::RpcHandler::get_output_distribution(::get_output_distribution, 0, 4, 8, ::get_block_hash, true, test_distribution_size);
ASSERT_TRUE(res != boost::none);
ASSERT_EQ(res->distribution.size(), 5);
ASSERT_EQ(res->distribution, std::vector<uint64_t>({0, 1, 6, 7, 11}));
}
TEST(output_distribution, part_noncumulative)
{
boost::optional<cryptonote::rpc::output_distribution_data> res;
res = cryptonote::rpc::RpcHandler::get_output_distribution(::get_output_distribution, 0, 4, 8, ::get_block_hash, false, test_distribution_size);
ASSERT_TRUE(res != boost::none);
ASSERT_EQ(res->distribution.size(), 5);
ASSERT_EQ(res->distribution, std::vector<uint64_t>({0, 1, 5, 1, 4}));
}