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monero/src/cryptonote_core/tx_pool.cpp
moneromooo-monero 5833d66f65
Change logging to easylogging++ 
This replaces the epee and data_loggers logging systems with
a single one, and also adds filename:line and explicit severity
levels. Categories may be defined, and logging severity set
by category (or set of categories). epee style 0-4 log level
maps to a sensible severity configuration. Log files now also
rotate when reaching 100 MB.

To select which logs to output, use the MONERO_LOGS environment
variable, with a comma separated list of categories (globs are
supported), with their requested severity level after a colon.
If a log matches more than one such setting, the last one in
the configuration string applies. A few examples:

This one is (mostly) silent, only outputting fatal errors:

MONERO_LOGS=*:FATAL

This one is very verbose:

MONERO_LOGS=*:TRACE

This one is totally silent (logwise):

MONERO_LOGS=""

This one outputs all errors and warnings, except for the
"verify" category, which prints just fatal errors (the verify
category is used for logs about incoming transactions and
blocks, and it is expected that some/many will fail to verify,
hence we don't want the spam):

MONERO_LOGS=*:WARNING,verify:FATAL

Log levels are, in decreasing order of priority:
FATAL, ERROR, WARNING, INFO, DEBUG, TRACE

Subcategories may be added using prefixes and globs. This
example will output net.p2p logs at the TRACE level, but all
other net* logs only at INFO:

MONERO_LOGS=*:ERROR,net*:INFO,net.p2p:TRACE

Logs which are intended for the user (which Monero was using
a lot through epee, but really isn't a nice way to go things)
should use the "global" category. There are a few helper macros
for using this category, eg: MGINFO("this shows up by default")
or MGINFO_RED("this is red"), to try to keep a similar look
and feel for now.

Existing epee log macros still exist, and map to the new log
levels, but since they're used as a "user facing" UI element
as much as a logging system, they often don't map well to log
severities (ie, a log level 0 log may be an error, or may be
something we want the user to see, such as an important info).
In those cases, I tried to use the new macros. In other cases,
I left the existing macros in. When modifying logs, it is
probably best to switch to the new macros with explicit levels.

The --log-level options and set_log commands now also accept
category settings, in addition to the epee style log levels.
2017-01-16 00:25:46 +00:00

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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
#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.h"
#include "common/boost_serialization_helper.h"
#include "common/int-util.h"
#include "misc_language.h"
#include "warnings.h"
#include "common/perf_timer.h"
#include "crypto/hash.h"
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "txpool"
DISABLE_VS_WARNINGS(4244 4345 4503) //'boost::foreach_detail_::or_' : decorated name length exceeded, name was truncated
namespace cryptonote
{
namespace
{
//TODO: constants such as these should at least be in the header,
// but probably somewhere more accessible to the rest of the
// codebase. As it stands, it is at best nontrivial to test
// whether or not changing these parameters (or adding new)
// will work correctly.
size_t const TRANSACTION_SIZE_LIMIT_V1 = (((CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V1 * 125) / 100) - CRYPTONOTE_COINBASE_BLOB_RESERVED_SIZE);
size_t const TRANSACTION_SIZE_LIMIT_V2 = (((CRYPTONOTE_BLOCK_GRANTED_FULL_REWARD_ZONE_V2 * 125) / 100) - CRYPTONOTE_COINBASE_BLOB_RESERVED_SIZE);
time_t const MIN_RELAY_TIME = (60 * 5); // only start re-relaying transactions after that many seconds
time_t const MAX_RELAY_TIME = (60 * 60 * 4); // at most that many seconds between resends
float const ACCEPT_THRESHOLD = 0.99f;
// a kind of increasing backoff within min/max bounds
time_t get_relay_delay(time_t now, time_t received)
{
time_t d = (now - received + MIN_RELAY_TIME) / MIN_RELAY_TIME * MIN_RELAY_TIME;
if (d > MAX_RELAY_TIME)
d = MAX_RELAY_TIME;
return d;
}
uint64_t template_accept_threshold(uint64_t amount)
{
return amount * ACCEPT_THRESHOLD;
}
}
//---------------------------------------------------------------------------------
//---------------------------------------------------------------------------------
tx_memory_pool::tx_memory_pool(Blockchain& 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, bool relayed, bool do_not_relay, uint8_t version)
{
PERF_TIMER(add_tx);
if (tx.version == 0)
{
// v0 never accepted
LOG_PRINT_L1("transaction version 0 is invalid");
tvc.m_verifivation_failed = true;
return false;
}
// we do not accept transactions that timed out before, unless they're
// kept_by_block
if (!kept_by_block && m_timed_out_transactions.find(id) != m_timed_out_transactions.end())
{
// not clear if we should set that, since verifivation (sic) did not fail before, since
// the tx was accepted before timing out.
tvc.m_verifivation_failed = true;
return false;
}
if(!check_inputs_types_supported(tx))
{
tvc.m_verifivation_failed = true;
tvc.m_invalid_input = true;
return false;
}
// fee per kilobyte, size rounded up.
uint64_t fee;
if (tx.version == 1)
{
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_L1("transaction use more money then it has: use " << print_money(outputs_amount) << ", have " << print_money(inputs_amount));
tvc.m_verifivation_failed = true;
tvc.m_overspend = true;
return false;
}
fee = inputs_amount - outputs_amount;
}
else
{
fee = tx.rct_signatures.txnFee;
}
if (!kept_by_block && !m_blockchain.check_fee(blob_size, fee))
{
tvc.m_verifivation_failed = true;
tvc.m_fee_too_low = true;
return false;
}
size_t tx_size_limit = (version < 2 ? TRANSACTION_SIZE_LIMIT_V1 : TRANSACTION_SIZE_LIMIT_V2);
if (!kept_by_block && blob_size >= tx_size_limit)
{
LOG_PRINT_L1("transaction is too big: " << blob_size << " bytes, maximum size: " << tx_size_limit);
tvc.m_verifivation_failed = true;
tvc.m_too_big = true;
return false;
}
// if the transaction came from a block popped from the chain,
// don't check if we have its key images as spent.
// TODO: Investigate why not?
if(!kept_by_block)
{
if(have_tx_keyimges_as_spent(tx))
{
LOG_PRINT_L1("Transaction with id= "<< id << " used already spent key images");
tvc.m_verifivation_failed = true;
tvc.m_double_spend = true;
return false;
}
}
if (!m_blockchain.check_tx_outputs(tx, tvc))
{
LOG_PRINT_L1("Transaction with id= "<< id << " has at least one invalid output");
tvc.m_verifivation_failed = true;
tvc.m_invalid_output = true;
return false;
}
time_t receive_time = time(nullptr);
crypto::hash max_used_block_id = null_hash;
uint64_t max_used_block_height = 0;
tx_details txd;
txd.tx = tx;
bool ch_inp_res = m_blockchain.check_tx_inputs(txd.tx, max_used_block_height, max_used_block_id, tvc, kept_by_block);
CRITICAL_REGION_LOCAL(m_transactions_lock);
if(!ch_inp_res)
{
// if the transaction was valid before (kept_by_block), then it
// may become valid again, so ignore the failed inputs check.
if(kept_by_block)
{
auto txd_p = m_transactions.insert(transactions_container::value_type(id, txd));
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.fee = fee;
txd_p.first->second.max_used_block_id = null_hash;
txd_p.first->second.max_used_block_height = 0;
txd_p.first->second.last_failed_height = 0;
txd_p.first->second.last_failed_id = null_hash;
txd_p.first->second.kept_by_block = kept_by_block;
txd_p.first->second.receive_time = receive_time;
txd_p.first->second.last_relayed_time = time(NULL);
txd_p.first->second.relayed = relayed;
txd_p.first->second.do_not_relay = do_not_relay;
tvc.m_verifivation_impossible = true;
tvc.m_added_to_pool = true;
}else
{
LOG_PRINT_L1("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, txd));
CHECK_AND_ASSERT_MES(txd_p.second, false, "internal error: transaction already exists at inserting in memorypool");
txd_p.first->second.blob_size = blob_size;
txd_p.first->second.kept_by_block = kept_by_block;
txd_p.first->second.fee = fee;
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;
txd_p.first->second.receive_time = receive_time;
txd_p.first->second.last_relayed_time = time(NULL);
txd_p.first->second.relayed = relayed;
txd_p.first->second.do_not_relay = do_not_relay;
tvc.m_added_to_pool = true;
if(txd_p.first->second.fee > 0 && !do_not_relay)
tvc.m_should_be_relayed = true;
}
// assume failure during verification steps until success is certain
tvc.m_verifivation_failed = true;
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: kept_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;
m_txs_by_fee_and_receive_time.emplace(std::pair<double, std::time_t>((double)blob_size / fee, receive_time), id);
return true;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::add_tx(const transaction &tx, tx_verification_context& tvc, bool keeped_by_block, bool relayed, bool do_not_relay, uint8_t version)
{
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, relayed, do_not_relay, version);
}
//---------------------------------------------------------------------------------
//FIXME: Can return early before removal of all of the key images.
// At the least, need to make sure that a false return here
// is treated properly. Should probably not return early, however.
bool tx_memory_pool::remove_transaction_keyimages(const transaction& tx)
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
// ND: Speedup
// 1. Move transaction hash calcuation outside of loop. ._.
crypto::hash actual_hash = get_transaction_hash(tx);
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 = " << actual_hash);
auto it_in_set = key_image_set.find(actual_hash);
CHECK_AND_ASSERT_MES(it_in_set != key_image_set.end(), false, "transaction id not found in key_image set, img=" << txin.k_image << ENDL
<< "transaction id = " << actual_hash);
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, bool &relayed, bool &do_not_relay)
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
auto it = m_transactions.find(id);
if(it == m_transactions.end())
return false;
auto sorted_it = find_tx_in_sorted_container(id);
if (sorted_it == m_txs_by_fee_and_receive_time.end())
return false;
tx = it->second.tx;
blob_size = it->second.blob_size;
fee = it->second.fee;
relayed = it->second.relayed;
do_not_relay = it->second.do_not_relay;
remove_transaction_keyimages(it->second.tx);
m_transactions.erase(it);
m_txs_by_fee_and_receive_time.erase(sorted_it);
return true;
}
//---------------------------------------------------------------------------------
void tx_memory_pool::on_idle()
{
m_remove_stuck_tx_interval.do_call([this](){return remove_stuck_transactions();});
}
//---------------------------------------------------------------------------------
sorted_tx_container::iterator tx_memory_pool::find_tx_in_sorted_container(const crypto::hash& id) const
{
return std::find_if( m_txs_by_fee_and_receive_time.begin(), m_txs_by_fee_and_receive_time.end()
, [&](const sorted_tx_container::value_type& a){
return a.second == id;
}
);
}
//---------------------------------------------------------------------------------
//TODO: investigate whether boolean return is appropriate
bool tx_memory_pool::remove_stuck_transactions()
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
for(auto it = m_transactions.begin(); it!= m_transactions.end();)
{
uint64_t tx_age = time(nullptr) - it->second.receive_time;
if((tx_age > CRYPTONOTE_MEMPOOL_TX_LIVETIME && !it->second.kept_by_block) ||
(tx_age > CRYPTONOTE_MEMPOOL_TX_FROM_ALT_BLOCK_LIVETIME && it->second.kept_by_block) )
{
LOG_PRINT_L1("Tx " << it->first << " removed from tx pool due to outdated, age: " << tx_age );
remove_transaction_keyimages(it->second.tx);
auto sorted_it = find_tx_in_sorted_container(it->first);
if (sorted_it == m_txs_by_fee_and_receive_time.end())
{
LOG_PRINT_L1("Removing tx " << it->first << " from tx pool, but it was not found in the sorted txs container!");
}
else
{
m_txs_by_fee_and_receive_time.erase(sorted_it);
}
m_timed_out_transactions.insert(it->first);
auto pit = it++;
m_transactions.erase(pit);
}else
++it;
}
return true;
}
//---------------------------------------------------------------------------------
//TODO: investigate whether boolean return is appropriate
bool tx_memory_pool::get_relayable_transactions(std::list<std::pair<crypto::hash, cryptonote::transaction>> &txs) const
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
const time_t now = time(NULL);
for(auto it = m_transactions.begin(); it!= m_transactions.end();)
{
// 0 fee transactions are never relayed
if(it->second.fee > 0 && !it->second.do_not_relay && now - it->second.last_relayed_time > get_relay_delay(now, it->second.receive_time))
{
// if the tx is older than half the max lifetime, we don't re-relay it, to avoid a problem
// mentioned by smooth where nodes would flush txes at slightly different times, causing
// flushed txes to be re-added when received from a node which was just about to flush it
time_t max_age = it->second.kept_by_block ? CRYPTONOTE_MEMPOOL_TX_FROM_ALT_BLOCK_LIVETIME : CRYPTONOTE_MEMPOOL_TX_LIVETIME;
if (now - it->second.receive_time <= max_age / 2)
{
txs.push_back(std::make_pair(it->first, it->second.tx));
}
}
++it;
}
return true;
}
//---------------------------------------------------------------------------------
void tx_memory_pool::set_relayed(const std::list<std::pair<crypto::hash, cryptonote::transaction>> &txs)
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
const time_t now = time(NULL);
for (auto it = txs.begin(); it != txs.end(); ++it)
{
auto i = m_transactions.find(it->first);
if (i != m_transactions.end())
{
i->second.relayed = true;
i->second.last_relayed_time = now;
}
}
}
//---------------------------------------------------------------------------------
size_t tx_memory_pool::get_transactions_count() const
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
return m_transactions.size();
}
//---------------------------------------------------------------------------------
void tx_memory_pool::get_transactions(std::list<transaction>& txs) const
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
BOOST_FOREACH(const auto& tx_vt, m_transactions)
txs.push_back(tx_vt.second.tx);
}
//------------------------------------------------------------------
//TODO: investigate whether boolean return is appropriate
bool tx_memory_pool::get_transactions_and_spent_keys_info(std::vector<tx_info>& tx_infos, std::vector<spent_key_image_info>& key_image_infos) const
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
for (const auto& tx_vt : m_transactions)
{
tx_info txi;
const tx_details& txd = tx_vt.second;
txi.id_hash = epee::string_tools::pod_to_hex(tx_vt.first);
txi.tx_json = obj_to_json_str(*const_cast<transaction*>(&txd.tx));
txi.blob_size = txd.blob_size;
txi.fee = txd.fee;
txi.kept_by_block = txd.kept_by_block;
txi.max_used_block_height = txd.max_used_block_height;
txi.max_used_block_id_hash = epee::string_tools::pod_to_hex(txd.max_used_block_id);
txi.last_failed_height = txd.last_failed_height;
txi.last_failed_id_hash = epee::string_tools::pod_to_hex(txd.last_failed_id);
txi.receive_time = txd.receive_time;
txi.relayed = txd.relayed;
txi.last_relayed_time = txd.last_relayed_time;
txi.do_not_relay = txd.do_not_relay;
tx_infos.push_back(txi);
}
for (const key_images_container::value_type& kee : m_spent_key_images) {
const crypto::key_image& k_image = kee.first;
const std::unordered_set<crypto::hash>& kei_image_set = kee.second;
spent_key_image_info ki;
ki.id_hash = epee::string_tools::pod_to_hex(k_image);
for (const crypto::hash& tx_id_hash : kei_image_set)
{
ki.txs_hashes.push_back(epee::string_tools::pod_to_hex(tx_id_hash));
}
key_image_infos.push_back(ki);
}
return true;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::get_transaction(const crypto::hash& id, transaction& tx) const
{
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) const
{
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) const
{
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) const
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
return m_spent_key_images.end() != m_spent_key_images.find(key_im);
}
//---------------------------------------------------------------------------------
void tx_memory_pool::lock() const
{
m_transactions_lock.lock();
}
//---------------------------------------------------------------------------------
void tx_memory_pool::unlock() const
{
m_transactions_lock.unlock();
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::is_transaction_ready_to_go(tx_details& txd) const
{
//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
tx_verification_context tvc;
if(!m_blockchain.check_tx_inputs(txd.tx, txd.max_used_block_height, txd.max_used_block_id, tvc))
{
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(true)
{
//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
tx_verification_context tvc;
if(!m_blockchain.check_tx_inputs(txd.tx, txd.max_used_block_height, txd.max_used_block_id, tvc))
{
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) const
{
std::stringstream ss;
CRITICAL_REGION_LOCAL(m_transactions_lock);
for (const transactions_container::value_type& txe : m_transactions) {
const tx_details& txd = txe.second;
ss << "id: " << txe.first << std::endl;
if (!short_format) {
ss << obj_to_json_str(*const_cast<transaction*>(&txd.tx)) << std::endl;
}
ss << "blob_size: " << txd.blob_size << std::endl
<< "fee: " << print_money(txd.fee) << std::endl
<< "kept_by_block: " << (txd.kept_by_block ? 'T' : 'F') << std::endl
<< "max_used_block_height: " << txd.max_used_block_height << std::endl
<< "max_used_block_id: " << txd.max_used_block_id << std::endl
<< "last_failed_height: " << txd.last_failed_height << std::endl
<< "last_failed_id: " << txd.last_failed_id << std::endl;
}
return ss.str();
}
//---------------------------------------------------------------------------------
//TODO: investigate whether boolean return is appropriate
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, uint8_t version)
{
// Warning: This function takes already_generated_
// coins as an argument and appears to do nothing
// with it.
CRITICAL_REGION_LOCAL(m_transactions_lock);
uint64_t best_coinbase = 0;
total_size = 0;
fee = 0;
size_t max_total_size = 2 * median_size - CRYPTONOTE_COINBASE_BLOB_RESERVED_SIZE;
std::unordered_set<crypto::key_image> k_images;
LOG_PRINT_L2("Filling block template, median size " << median_size << ", " << m_txs_by_fee_and_receive_time.size() << " txes in the pool");
auto sorted_it = m_txs_by_fee_and_receive_time.begin();
while (sorted_it != m_txs_by_fee_and_receive_time.end())
{
auto tx_it = m_transactions.find(sorted_it->second);
LOG_PRINT_L2("Considering " << tx_it->first << ", size " << tx_it->second.blob_size << ", current block size " << total_size << "/" << max_total_size << ", current coinbase " << print_money(best_coinbase));
// Can not exceed maximum block size
if (max_total_size < total_size + tx_it->second.blob_size)
{
LOG_PRINT_L2(" would exceed maximum block size");
sorted_it++;
continue;
}
// If we're getting lower coinbase tx,
// stop including more tx
uint64_t block_reward;
if(!get_block_reward(median_size, total_size + tx_it->second.blob_size, already_generated_coins, block_reward, version))
{
LOG_PRINT_L2(" would exceed maximum block size");
sorted_it++;
continue;
}
uint64_t coinbase = block_reward + fee;
if (coinbase < template_accept_threshold(best_coinbase))
{
LOG_PRINT_L2(" would decrease coinbase to " << print_money(coinbase));
sorted_it++;
continue;
}
// 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_it->second) || have_key_images(k_images, tx_it->second.tx))
{
LOG_PRINT_L2(" not ready to go, or key images already seen");
sorted_it++;
continue;
}
bl.tx_hashes.push_back(tx_it->first);
total_size += tx_it->second.blob_size;
fee += tx_it->second.fee;
best_coinbase = coinbase;
append_key_images(k_images, tx_it->second.tx);
sorted_it++;
LOG_PRINT_L2(" added, new block size " << total_size << "/" << max_total_size << ", coinbase " << print_money(best_coinbase));
}
LOG_PRINT_L2("Block template filled with " << bl.tx_hashes.size() << " txes, size "
<< total_size << "/" << max_total_size << ", coinbase " << print_money(best_coinbase)
<< " (including " << print_money(fee) << " in fees)");
return true;
}
//---------------------------------------------------------------------------------
size_t tx_memory_pool::validate(uint8_t version)
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
size_t n_removed = 0;
size_t tx_size_limit = (version < 2 ? TRANSACTION_SIZE_LIMIT_V1 : TRANSACTION_SIZE_LIMIT_V2);
for (auto it = m_transactions.begin(); it != m_transactions.end(); ) {
if (it->second.blob_size >= tx_size_limit) {
LOG_PRINT_L1("Transaction " << get_transaction_hash(it->second.tx) << " is too big (" << it->second.blob_size << " bytes), removing it from pool");
remove_transaction_keyimages(it->second.tx);
auto sorted_it = find_tx_in_sorted_container(it->first);
if (sorted_it == m_txs_by_fee_and_receive_time.end())
{
LOG_PRINT_L1("Removing tx " << it->first << " from tx pool, but it was not found in the sorted txs container!");
}
else
{
m_txs_by_fee_and_receive_time.erase(sorted_it);
}
auto pit = it++;
m_transactions.erase(pit);
++n_removed;
continue;
}
it++;
}
return n_removed;
}
//---------------------------------------------------------------------------------
//TODO: investigate whether only ever returning true is correct
bool tx_memory_pool::init(const std::string& config_folder)
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
m_config_folder = config_folder;
if (m_config_folder.empty())
return true;
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_ERROR("Failed to load memory pool from file " << state_file_path);
m_transactions.clear();
m_txs_by_fee_and_receive_time.clear();
m_spent_key_images.clear();
}
// no need to store queue of sorted transactions, as it's easy to generate.
for (const auto& tx : m_transactions)
{
m_txs_by_fee_and_receive_time.emplace(std::pair<double, time_t>((double)tx.second.blob_size / tx.second.fee, tx.second.receive_time), tx.first);
}
// Ignore deserialization error
return true;
}
//---------------------------------------------------------------------------------
//TODO: investigate whether only ever returning true is correct
bool tx_memory_pool::deinit()
{
LOG_PRINT_L1("Received signal to deactivate memory pool store");
if (m_config_folder.empty())
{
LOG_PRINT_L1("Memory pool store already empty");
return true;
}
if (!tools::create_directories_if_necessary(m_config_folder))
{
LOG_ERROR("Failed to create memory pool 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_ERROR("Failed to serialize memory pool to file " << state_file_path);
return false;
}
else
{
LOG_PRINT_L1("Memory pool store deactivated successfully");
return true;
}
}
}
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