forked from townforge/townforge
389 lines
16 KiB
C++
389 lines
16 KiB
C++
// Copyright (c) 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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#define IN_UNIT_TESTS
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#include "gtest/gtest.h"
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#include "cryptonote_core/blockchain.h"
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#include "cryptonote_core/tx_pool.h"
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#include "cryptonote_core/cryptonote_core.h"
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#include "blockchain_db/testdb.h"
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#define TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW 5000
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namespace
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{
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class TestDB: public cryptonote::BaseTestDB
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{
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private:
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struct block_t
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{
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size_t weight;
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uint64_t long_term_weight;
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};
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public:
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TestDB() { m_open = true; }
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virtual void add_block( const cryptonote::block& blk
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, size_t block_weight
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, uint64_t long_term_block_weight
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, const cryptonote::difficulty_type& cumulative_difficulty
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, const uint64_t& coins_generated
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, uint64_t num_rct_outs
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, const crypto::hash& blk_hash
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) override {
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blocks.push_back({block_weight, long_term_block_weight});
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}
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virtual uint64_t height() const override { return blocks.size(); }
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virtual size_t get_block_weight(const uint64_t &h) const override { return blocks[h].weight; }
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virtual uint64_t get_block_long_term_weight(const uint64_t &h) const override { return blocks[h].long_term_weight; }
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virtual std::vector<uint64_t> get_block_weights(uint64_t start_height, size_t count) const override {
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std::vector<uint64_t> ret;
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ret.reserve(count);
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while (count-- && start_height < blocks.size()) ret.push_back(blocks[start_height++].weight);
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return ret;
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}
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virtual std::vector<uint64_t> get_long_term_block_weights(uint64_t start_height, size_t count) const override {
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std::vector<uint64_t> ret;
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ret.reserve(count);
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while (count-- && start_height < blocks.size()) ret.push_back(blocks[start_height++].long_term_weight);
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return ret;
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}
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virtual crypto::hash get_block_hash_from_height(const uint64_t &height) const override {
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crypto::hash hash = crypto::null_hash;
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*(uint64_t*)&hash = height;
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return hash;
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}
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virtual crypto::hash top_block_hash(uint64_t *block_height = NULL) const override {
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uint64_t h = height();
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crypto::hash top = crypto::null_hash;
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if (h)
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*(uint64_t*)&top = h - 1;
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if (block_height)
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*block_height = h - 1;
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return top;
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}
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virtual cryptonote::block get_top_block() const { cryptonote::block b; b.major_version = b.minor_version = 12; return b; }
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virtual void pop_block(cryptonote::block &blk, std::vector<cryptonote::transaction> &txs) override { blocks.pop_back(); }
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private:
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std::vector<block_t> blocks;
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};
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static uint32_t lcg_seed = 0;
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static uint32_t lcg()
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{
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lcg_seed = (lcg_seed * 0x100000001b3 + 0xcbf29ce484222325) & 0xffffffff;
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return lcg_seed;
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}
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}
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#define PREFIX_WINDOW(hf_version,window) \
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std::unique_ptr<cryptonote::Blockchain> bc; \
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cryptonote::tx_memory_pool txpool(*bc); \
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bc.reset(new cryptonote::Blockchain(txpool)); \
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struct get_test_options { \
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const std::pair<uint8_t, uint64_t> hard_forks[2]; \
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const cryptonote::test_options test_options = { \
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hard_forks, \
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window, \
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}; \
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get_test_options(): hard_forks{std::make_pair((uint8_t)hf_version, (uint64_t)0), std::make_pair((uint8_t)0, (uint64_t)0)} {} \
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} opts; \
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cryptonote::Blockchain *blockchain = bc.get(); \
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bool r = blockchain->init(new TestDB(), cryptonote::FAKECHAIN, true, &opts.test_options, 0, NULL); \
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ASSERT_TRUE(r)
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#define PREFIX(hf_version) PREFIX_WINDOW(hf_version, TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW)
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TEST(long_term_block_weight, empty_short)
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{
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PREFIX(12);
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit());
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ASSERT_EQ(bc->get_current_cumulative_block_weight_median(), CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V5);
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ASSERT_EQ(bc->get_current_cumulative_block_weight_limit(), CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V5 * 2);
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}
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TEST(long_term_block_weight, identical_after_fork_before_long_term_window)
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{
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PREFIX(12);
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for (uint64_t h = 1; h <= TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW; ++h)
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{
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size_t w = h < TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW ? CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V5 : bc->get_current_cumulative_block_weight_limit();
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uint64_t ltw = bc->get_next_long_term_block_weight(w);
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bc->get_db().add_block(std::make_pair(cryptonote::block(), ""), w, ltw, h, h, {});
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit());
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}
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for (uint64_t h = 0; h < TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW; ++h)
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{
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ASSERT_EQ(bc->get_db().get_block_long_term_weight(h), bc->get_db().get_block_weight(h));
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}
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}
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TEST(long_term_block_weight, ceiling_at_30000000)
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{
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PREFIX(12);
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for (uint64_t h = 0; h < TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW + TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW / 2 - 1; ++h)
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{
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size_t w = h < TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW ? CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V5 : bc->get_current_cumulative_block_weight_limit();
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uint64_t ltw = bc->get_next_long_term_block_weight(w);
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bc->get_db().add_block(std::make_pair(cryptonote::block(), ""), w, ltw, h, h, {});
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit());
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}
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ASSERT_EQ(bc->get_current_cumulative_block_weight_median(), 15000000);
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ASSERT_EQ(bc->get_current_cumulative_block_weight_limit(), 30000000);
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}
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TEST(long_term_block_weight, multi_pop)
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{
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PREFIX(12);
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for (uint64_t h = 1; h <= TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW + 20; ++h)
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{
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size_t w = h < TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW ? CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V5 : bc->get_current_cumulative_block_weight_limit();
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uint64_t ltw = bc->get_next_long_term_block_weight(w);
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bc->get_db().add_block(std::make_pair(cryptonote::block(), ""), w, ltw, h, h, {});
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit());
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}
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const uint64_t effective_median = bc->get_current_cumulative_block_weight_median();
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const uint64_t effective_limit = bc->get_current_cumulative_block_weight_limit();
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const uint64_t num_pop = 4;
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for (uint64_t h = 0; h < num_pop; ++h)
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{
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size_t w = bc->get_current_cumulative_block_weight_limit();
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uint64_t ltw = bc->get_next_long_term_block_weight(w);
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bc->get_db().add_block(std::make_pair(cryptonote::block(), ""), w, ltw, h, h, {});
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit());
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}
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cryptonote::block b;
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std::vector<cryptonote::transaction> txs;
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for (uint64_t h = 0; h < num_pop; ++h)
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bc->get_db().pop_block(b, txs);
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit());
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ASSERT_EQ(effective_median, bc->get_current_cumulative_block_weight_median());
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ASSERT_EQ(effective_limit, bc->get_current_cumulative_block_weight_limit());
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}
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TEST(long_term_block_weight, multiple_updates)
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{
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PREFIX(12);
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for (uint64_t h = 1; h <= 3 * TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW; ++h)
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{
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size_t w = h < TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW ? CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V5 : bc->get_current_cumulative_block_weight_limit();
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uint64_t ltw = bc->get_next_long_term_block_weight(w);
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bc->get_db().add_block(std::make_pair(cryptonote::block(), ""), w, ltw, h, h, {});
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit());
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const uint64_t effective_median = bc->get_current_cumulative_block_weight_median();
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const uint64_t effective_limit = bc->get_current_cumulative_block_weight_limit();
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit());
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ASSERT_EQ(effective_median, bc->get_current_cumulative_block_weight_median());
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ASSERT_EQ(effective_limit, bc->get_current_cumulative_block_weight_limit());
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit());
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ASSERT_EQ(effective_median, bc->get_current_cumulative_block_weight_median());
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ASSERT_EQ(effective_limit, bc->get_current_cumulative_block_weight_limit());
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit());
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ASSERT_EQ(effective_median, bc->get_current_cumulative_block_weight_median());
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ASSERT_EQ(effective_limit, bc->get_current_cumulative_block_weight_limit());
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}
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}
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TEST(long_term_block_weight, pop_invariant_max)
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{
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PREFIX(12);
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for (uint64_t h = 1; h < TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW - 10; ++h)
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{
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size_t w = bc->get_db().height() < TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW ? CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V5 : bc->get_current_cumulative_block_weight_limit();
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uint64_t ltw = bc->get_next_long_term_block_weight(w);
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bc->get_db().add_block(std::make_pair(cryptonote::block(), ""), w, ltw, h, h, {});
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit());
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}
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for (int n = 0; n < 1000; ++n)
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{
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// pop some blocks, then add some more
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int remove = 1 + (n * 17) % 8;
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int add = (n * 23) % 12;
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// save long term block weights we're about to remove
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uint64_t old_ltbw[16], h0 = bc->get_db().height() - remove - 1;
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for (int i = -2; i < remove; ++i)
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{
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old_ltbw[i + 2] = bc->get_db().get_block_long_term_weight(h0 + i);
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}
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for (int i = 0; i < remove; ++i)
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{
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cryptonote::block b;
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std::vector<cryptonote::transaction> txs;
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bc->get_db().pop_block(b, txs);
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit());
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}
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for (int i = 0; i < add; ++i)
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{
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size_t w = bc->get_db().height() < TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW ? CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V5 : bc->get_current_cumulative_block_weight_limit();
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uint64_t ltw = bc->get_next_long_term_block_weight(w);
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bc->get_db().add_block(std::make_pair(cryptonote::block(), ""), w, ltw, bc->get_db().height(), bc->get_db().height(), {});
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit());
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}
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// check the new values are the same as the old ones
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for (int i = -2; i < std::min(add, remove); ++i)
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{
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ASSERT_EQ(bc->get_db().get_block_long_term_weight(h0 + i), old_ltbw[i + 2]);
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}
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}
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}
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TEST(long_term_block_weight, pop_invariant_random)
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{
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PREFIX(12);
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for (uint64_t h = 1; h < 2 * TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW - 10; ++h)
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{
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lcg_seed = bc->get_db().height();
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uint32_t r = lcg();
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size_t w = bc->get_db().height() < TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW ? CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V5 : (r % bc->get_current_cumulative_block_weight_limit());
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uint64_t ltw = bc->get_next_long_term_block_weight(w);
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bc->get_db().add_block(std::make_pair(cryptonote::block(), ""), w, ltw, h, h, {});
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit());
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}
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for (int n = 0; n < 1000; ++n)
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{
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// pop some blocks, then add some more
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int remove = 1 + (n * 17) % 8;
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int add = (n * 23) % 123;
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// save long term block weights we're about to remove
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uint64_t old_ltbw[16], h0 = bc->get_db().height() - remove - 1;
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for (int i = -2; i < remove; ++i)
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{
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old_ltbw[i + 2] = bc->get_db().get_block_long_term_weight(h0 + i);
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}
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for (int i = 0; i < remove; ++i)
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{
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cryptonote::block b;
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std::vector<cryptonote::transaction> txs;
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bc->get_db().pop_block(b, txs);
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit());
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const uint64_t effective_median = bc->get_current_cumulative_block_weight_median();
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const uint64_t effective_limit = bc->get_current_cumulative_block_weight_limit();
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit());
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ASSERT_EQ(effective_median, bc->get_current_cumulative_block_weight_median());
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ASSERT_EQ(effective_limit, bc->get_current_cumulative_block_weight_limit());
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}
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for (int i = 0; i < add; ++i)
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{
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lcg_seed = bc->get_db().height();
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uint32_t r = lcg();
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size_t w = bc->get_db().height() < TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW ? CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V5 : (r % bc->get_current_cumulative_block_weight_limit());
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uint64_t ltw = bc->get_next_long_term_block_weight(w);
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bc->get_db().add_block(std::make_pair(cryptonote::block(), ""), w, ltw, bc->get_db().height(), bc->get_db().height(), {});
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit());
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const uint64_t effective_median = bc->get_current_cumulative_block_weight_median();
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const uint64_t effective_limit = bc->get_current_cumulative_block_weight_limit();
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit());
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ASSERT_EQ(effective_median, bc->get_current_cumulative_block_weight_median());
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ASSERT_EQ(effective_limit, bc->get_current_cumulative_block_weight_limit());
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}
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// check the new values are the same as the old ones
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for (int i = -2; i < std::min(add, remove); ++i)
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{
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ASSERT_EQ(bc->get_db().get_block_long_term_weight(h0 + i), old_ltbw[i + 2]);
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}
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}
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}
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TEST(long_term_block_weight, long_growth_spike_and_drop)
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{
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PREFIX(12);
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uint64_t long_term_effective_median_block_weight;
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// constant init
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for (uint64_t h = 0; h < TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW; ++h)
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{
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size_t w = CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V5;
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uint64_t ltw = bc->get_next_long_term_block_weight(w);
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bc->get_db().add_block(std::make_pair(cryptonote::block(), ""), w, ltw, h, h, {});
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit(&long_term_effective_median_block_weight));
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}
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ASSERT_EQ(long_term_effective_median_block_weight, 300000);
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// slow 10% yearly for a year (scaled down by 100000 / TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW) -> 8% change
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for (uint64_t h = 0; h < 365 * 720 * TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW / 100000; ++h)
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{
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//size_t w = bc->get_current_cumulative_block_weight_median() * rate;
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float t = h / float(365 * 720 * TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW / 100000);
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size_t w = 300000 + t * 30000;
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uint64_t ltw = bc->get_next_long_term_block_weight(w);
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bc->get_db().add_block(std::make_pair(cryptonote::block(), ""), w, ltw, h, h, {});
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit(&long_term_effective_median_block_weight));
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}
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ASSERT_GT(long_term_effective_median_block_weight, 300000 * 1.07);
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ASSERT_LT(long_term_effective_median_block_weight, 300000 * 1.09);
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// spike over three weeks - does not move much
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for (uint64_t h = 0; h < 21 * 720 * TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW / 100000; ++h)
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{
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size_t w = bc->get_current_cumulative_block_weight_limit();
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uint64_t ltw = bc->get_next_long_term_block_weight(w);
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bc->get_db().add_block(std::make_pair(cryptonote::block(), ""), w, ltw, h, h, {});
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit(&long_term_effective_median_block_weight));
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}
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ASSERT_GT(long_term_effective_median_block_weight, 300000 * 1.07);
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ASSERT_LT(long_term_effective_median_block_weight, 300000 * 1.09);
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// drop - does not move much
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for (uint64_t h = 0; h < 21 * 720 * TEST_LONG_TERM_BLOCK_WEIGHT_WINDOW / 100000; ++h)
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{
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size_t w = bc->get_current_cumulative_block_weight_median() * .25;
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uint64_t ltw = bc->get_next_long_term_block_weight(w);
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bc->get_db().add_block(std::make_pair(cryptonote::block(), ""), w, ltw, h, h, {});
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ASSERT_TRUE(bc->update_next_cumulative_weight_limit(&long_term_effective_median_block_weight));
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|
}
|
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ASSERT_GT(long_term_effective_median_block_weight, 300000 * 1.07);
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ASSERT_LT(long_term_effective_median_block_weight, 300000 * 1.09);
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}
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