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328a52a543
wownero/src/cryptonote_core/tx_pool.cpp
mydesktop 328a52a543 dynamic tx size scaling for tx mempool
2014-05-26 20:57:50 -04:00

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// Copyright (c) 2012-2013 The Cryptonote developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <algorithm>
#include <boost/filesystem.hpp>
#include <unordered_set>
#include <vector>
#include "tx_pool.h"
#include "cryptonote_format_utils.h"
#include "cryptonote_boost_serialization.h"
#include "cryptonote_config.h"
#include "blockchain_storage.h"
#include "common/boost_serialization_helper.h"
#include "common/int-util.h"
#include "misc_language.h"
#include "warnings.h"
#include "crypto/hash.h"
DISABLE_VS_WARNINGS(4244 4345 4503) //'boost::foreach_detail_::or_' : decorated name length exceeded, name was truncated
namespace cryptonote
{
//---------------------------------------------------------------------------------
tx_memory_pool::tx_memory_pool(blockchain_storage& bchs): m_blockchain(bchs)
{
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::add_tx(const transaction &tx, /*const crypto::hash& tx_prefix_hash,*/ const crypto::hash &id, size_t blob_size, tx_verification_context& tvc, bool kept_by_block)
{
if(!check_inputs_types_supported(tx))
{
tvc.m_verifivation_failed = true;
return false;
}
uint64_t inputs_amount = 0;
if(!get_inputs_money_amount(tx, inputs_amount))
{
tvc.m_verifivation_failed = true;
return false;
}
uint64_t outputs_amount = get_outs_money_amount(tx);
if(outputs_amount >= inputs_amount)
{
LOG_PRINT_L0("transaction use more money then it has: use " << outputs_amount << ", have " << inputs_amount);
tvc.m_verifivation_failed = true;
return false;
}
//check key images for transaction if it is not kept by block
if(!kept_by_block)
{
if(have_tx_keyimges_as_spent(tx))
{
LOG_ERROR("Transaction with id= "<< id << " used already spent key images");
tvc.m_verifivation_failed = true;
return false;
}
}
crypto::hash max_used_block_id = null_hash;
uint64_t max_used_block_height = 0;
bool ch_inp_res = m_blockchain.check_tx_inputs(tx, max_used_block_height, max_used_block_id);
CRITICAL_REGION_LOCAL(m_transactions_lock);
if(!ch_inp_res)
{
if(kept_by_block)
{
//anyway add this transaction to pool, because it related to block
auto txd_p = m_transactions.insert(transactions_container::value_type(id, tx_details()));
CHECK_AND_ASSERT_MES(txd_p.second, false, "transaction already exists at inserting in memory pool");
txd_p.first->second.blob_size = blob_size;
txd_p.first->second.tx = tx;
txd_p.first->second.fee = inputs_amount - outputs_amount;
txd_p.first->second.max_used_block_id = null_hash;
txd_p.first->second.max_used_block_height = 0;
txd_p.first->second.kept_by_block = kept_by_block;
tvc.m_verifivation_impossible = true;
tvc.m_added_to_pool = true;
}else
{
LOG_PRINT_L0("tx used wrong inputs, rejected");
tvc.m_verifivation_failed = true;
return false;
}
}else
{
//update transactions container
auto txd_p = m_transactions.insert(transactions_container::value_type(id, tx_details()));
CHECK_AND_ASSERT_MES(txd_p.second, false, "intrnal error: transaction already exists at inserting in memorypool");
txd_p.first->second.blob_size = blob_size;
txd_p.first->second.tx = tx;
txd_p.first->second.kept_by_block = kept_by_block;
txd_p.first->second.fee = inputs_amount - outputs_amount;
txd_p.first->second.max_used_block_id = max_used_block_id;
txd_p.first->second.max_used_block_height = max_used_block_height;
txd_p.first->second.last_failed_height = 0;
txd_p.first->second.last_failed_id = null_hash;
tvc.m_added_to_pool = true;
if(txd_p.first->second.fee > 0)
tvc.m_should_be_relayed = true;
}
tvc.m_verifivation_failed = true;
//update image_keys container, here should everything goes ok.
BOOST_FOREACH(const auto& in, tx.vin)
{
CHECKED_GET_SPECIFIC_VARIANT(in, const txin_to_key, txin, false);
std::unordered_set<crypto::hash>& kei_image_set = m_spent_key_images[txin.k_image];
CHECK_AND_ASSERT_MES(kept_by_block || kei_image_set.size() == 0, false, "internal error: keeped_by_block=" << kept_by_block
<< ", kei_image_set.size()=" << kei_image_set.size() << ENDL << "txin.k_image=" << txin.k_image << ENDL
<< "tx_id=" << id );
auto ins_res = kei_image_set.insert(id);
CHECK_AND_ASSERT_MES(ins_res.second, false, "internal error: try to insert duplicate iterator in key_image set");
}
tvc.m_verifivation_failed = false;
//succeed
return true;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::add_tx(const transaction &tx, tx_verification_context& tvc, bool keeped_by_block)
{
crypto::hash h = null_hash;
size_t blob_size = 0;
get_transaction_hash(tx, h, blob_size);
return add_tx(tx, h, blob_size, tvc, keeped_by_block);
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::remove_transaction_keyimages(const transaction& tx)
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
BOOST_FOREACH(const txin_v& vi, tx.vin)
{
CHECKED_GET_SPECIFIC_VARIANT(vi, const txin_to_key, txin, false);
auto it = m_spent_key_images.find(txin.k_image);
CHECK_AND_ASSERT_MES(it != m_spent_key_images.end(), false, "failed to find transaction input in key images. img=" << txin.k_image << ENDL
<< "transaction id = " << get_transaction_hash(tx));
std::unordered_set<crypto::hash>& key_image_set = it->second;
CHECK_AND_ASSERT_MES(key_image_set.size(), false, "empty key_image set, img=" << txin.k_image << ENDL
<< "transaction id = " << get_transaction_hash(tx));
auto it_in_set = key_image_set.find(get_transaction_hash(tx));
CHECK_AND_ASSERT_MES(key_image_set.size(), false, "transaction id not found in key_image set, img=" << txin.k_image << ENDL
<< "transaction id = " << get_transaction_hash(tx));
key_image_set.erase(it_in_set);
if(!key_image_set.size())
{
//it is now empty hash container for this key_image
m_spent_key_images.erase(it);
}
}
return true;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::take_tx(const crypto::hash &id, transaction &tx, size_t& blob_size, uint64_t& fee)
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
auto it = m_transactions.find(id);
if(it == m_transactions.end())
return false;
tx = it->second.tx;
blob_size = it->second.blob_size;
fee = it->second.fee;
remove_transaction_keyimages(it->second.tx);
m_transactions.erase(it);
return true;
}
//---------------------------------------------------------------------------------
size_t tx_memory_pool::get_transactions_count()
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
return m_transactions.size();
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::get_transactions(std::list<transaction>& txs)
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
BOOST_FOREACH(const auto& tx_vt, m_transactions)
txs.push_back(tx_vt.second.tx);
return true;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::get_transaction(const crypto::hash& id, transaction& tx)
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
auto it = m_transactions.find(id);
if(it == m_transactions.end())
return false;
tx = it->second.tx;
return true;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::on_blockchain_inc(uint64_t new_block_height, const crypto::hash& top_block_id)
{
return true;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::on_blockchain_dec(uint64_t new_block_height, const crypto::hash& top_block_id)
{
return true;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::have_tx(const crypto::hash &id)
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
if(m_transactions.count(id))
return true;
return false;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::have_tx_keyimges_as_spent(const transaction& tx)
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
BOOST_FOREACH(const auto& in, tx.vin)
{
CHECKED_GET_SPECIFIC_VARIANT(in, const txin_to_key, tokey_in, true);//should never fail
if(have_tx_keyimg_as_spent(tokey_in.k_image))
return true;
}
return false;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::have_tx_keyimg_as_spent(const crypto::key_image& key_im)
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
return m_spent_key_images.end() != m_spent_key_images.find(key_im);
}
//---------------------------------------------------------------------------------
void tx_memory_pool::lock()
{
m_transactions_lock.lock();
}
//---------------------------------------------------------------------------------
void tx_memory_pool::unlock()
{
m_transactions_lock.unlock();
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::is_transaction_ready_to_go(tx_details& txd)
{
//not the best implementation at this time, sorry :(
//check is ring_signature already checked ?
if(txd.max_used_block_id == null_hash)
{//not checked, lets try to check
if(txd.last_failed_id != null_hash && m_blockchain.get_current_blockchain_height() > txd.last_failed_height && txd.last_failed_id == m_blockchain.get_block_id_by_height(txd.last_failed_height))
return false;//we already sure that this tx is broken for this height
if(!m_blockchain.check_tx_inputs(txd.tx, txd.max_used_block_height, txd.max_used_block_id))
{
txd.last_failed_height = m_blockchain.get_current_blockchain_height()-1;
txd.last_failed_id = m_blockchain.get_block_id_by_height(txd.last_failed_height);
return false;
}
}else
{
if(txd.max_used_block_height >= m_blockchain.get_current_blockchain_height())
return false;
if(m_blockchain.get_block_id_by_height(txd.max_used_block_height) != txd.max_used_block_id)
{
//if we already failed on this height and id, skip actual ring signature check
if(txd.last_failed_id == m_blockchain.get_block_id_by_height(txd.last_failed_height))
return false;
//check ring signature again, it is possible (with very small chance) that this transaction become again valid
if(!m_blockchain.check_tx_inputs(txd.tx, txd.max_used_block_height, txd.max_used_block_id))
{
txd.last_failed_height = m_blockchain.get_current_blockchain_height()-1;
txd.last_failed_id = m_blockchain.get_block_id_by_height(txd.last_failed_height);
return false;
}
}
}
//if we here, transaction seems valid, but, anyway, check for key_images collisions with blockchain, just to be sure
if(m_blockchain.have_tx_keyimges_as_spent(txd.tx))
return false;
//transaction is ok.
return true;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::have_key_images(const std::unordered_set<crypto::key_image>& k_images, const transaction& tx)
{
for(size_t i = 0; i!= tx.vin.size(); i++)
{
CHECKED_GET_SPECIFIC_VARIANT(tx.vin[i], const txin_to_key, itk, false);
if(k_images.count(itk.k_image))
return true;
}
return false;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::append_key_images(std::unordered_set<crypto::key_image>& k_images, const transaction& tx)
{
for(size_t i = 0; i!= tx.vin.size(); i++)
{
CHECKED_GET_SPECIFIC_VARIANT(tx.vin[i], const txin_to_key, itk, false);
auto i_res = k_images.insert(itk.k_image);
CHECK_AND_ASSERT_MES(i_res.second, false, "internal error: key images pool cache - inserted duplicate image in set: " << itk.k_image);
}
return true;
}
//---------------------------------------------------------------------------------
std::string tx_memory_pool::print_pool(bool short_format)
{
std::stringstream ss;
CRITICAL_REGION_LOCAL(m_transactions_lock);
BOOST_FOREACH(transactions_container::value_type& txe, m_transactions)
{
if(short_format)
{
tx_details& txd = txe.second;
ss << "id: " << txe.first << ENDL
<< "blob_size: " << txd.blob_size << ENDL
<< "fee: " << txd.fee << ENDL
<< "kept_by_block: " << txd.kept_by_block << ENDL
<< "max_used_block_height: " << txd.max_used_block_height << ENDL
<< "max_used_block_id: " << txd.max_used_block_id << ENDL
<< "last_failed_height: " << txd.last_failed_height << ENDL
<< "last_failed_id: " << txd.last_failed_id << ENDL;
}else
{
tx_details& txd = txe.second;
ss << "id: " << txe.first << ENDL
<< obj_to_json_str(txd.tx) << ENDL
<< "blob_size: " << txd.blob_size << ENDL
<< "fee: " << txd.fee << ENDL
<< "kept_by_block: " << txd.kept_by_block << ENDL
<< "max_used_block_height: " << txd.max_used_block_height << ENDL
<< "max_used_block_id: " << txd.max_used_block_id << ENDL
<< "last_failed_height: " << txd.last_failed_height << ENDL
<< "last_failed_id: " << txd.last_failed_id << ENDL;
}
}
return ss.str();
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::fill_block_template(block &bl, size_t median_size, uint64_t already_generated_coins, size_t &total_size, uint64_t &fee)
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
total_size = 0;
fee = 0;
size_t max_total_size = 2 * median_size - CRYPTONOTE_COINBASE_BLOB_RESERVED_SIZE; // Max block size
std::unordered_set<crypto::key_image> k_images;
// Tx size limit as in wallet2.h
uint64_t upper_transaction_size_limit = ((CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE * 125) / 100) - CRYPTONOTE_COINBASE_BLOB_RESERVED_SIZE;
// Calculate size limit based on median too; useful
// for when we actually fix wallet2.h's maximum
// allowable tx size
//
// Can be removed when wallet2.h calculates max
// tx size based on the median too; just use
// upper_transaction_size_limit_median in all cases
uint64_t upper_transaction_size_limit_median = ((median_size * 125) / 100) - CRYPTONOTE_COINBASE_BLOB_RESERVED_SIZE;
if (upper_transaction_size_limit_median > upper_transaction_size_limit)
upper_transaction_size_limit = upper_transaction_size_limit_median;
BOOST_FOREACH(transactions_container::value_type& tx, m_transactions)
{
// Can not exceed maximum block size
if (max_total_size < total_size + tx.second.blob_size)
continue;
// Check to see if the minimum fee is included;
// exclude tx missing minimum fee
if (tx.second.fee < DEFAULT_FEE)
continue;
// Skip transactions that are too large
// TODO: Correct upper_transactions_size_limit
// such that it is based on median block size;
// We need to make a similar patch for
// wallet2.h
if (tx.second.blob_size > upper_transaction_size_limit)
continue;
// If adding this tx will make the block size
// greater than 130% of the median, reject the
// tx; this will keep down largely punitive tx
// from being included
if ( (total_size + tx.second.blob_size) > ((130 * median_size) / 100) )
continue;
// If we've exceeded the penalty free size,
// stop including more tx
if (total_size > median_size)
break;
// Skip transactions that are not ready to be
// included into the blockchain or that are
// missing key images
if (!is_transaction_ready_to_go(tx.second) || have_key_images(k_images, tx.second.tx))
continue;
bl.tx_hashes.push_back(tx.first);
total_size += tx.second.blob_size;
fee += tx.second.fee;
append_key_images(k_images, tx.second.tx);
}
return true;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::init(const std::string& config_folder)
{
m_config_folder = config_folder;
std::string state_file_path = config_folder + "/" + CRYPTONOTE_POOLDATA_FILENAME;
boost::system::error_code ec;
if(!boost::filesystem::exists(state_file_path, ec))
return true;
bool res = tools::unserialize_obj_from_file(*this, state_file_path);
if(!res)
{
LOG_PRINT_L0("Failed to load memory pool from file " << state_file_path);
}
return res;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::deinit()
{
if (!tools::create_directories_if_necessary(m_config_folder))
{
LOG_PRINT_L0("Failed to create data directory: " << m_config_folder);
return false;
}
std::string state_file_path = m_config_folder + "/" + CRYPTONOTE_POOLDATA_FILENAME;
bool res = tools::serialize_obj_to_file(*this, state_file_path);
if(!res)
{
LOG_PRINT_L0("Failed to serialize memory pool to file " << state_file_path);
}
return true;
}
}
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