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tx_pool: cache check_tx_inputs results 

This is called a lot when creating a block template, and
does not change until the blockchain changes.
This also avoids tx parsing when cached.
This commit is contained in:
moneromooo-monero 2018-06-24 10:46:57 +01:00
parent 9a3712541e
commit 41b4bf9d6d
No known key found for this signature in database
GPG Key ID: 686F07454D6CEFC3
2 changed files with 35 additions and 6 deletions
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33
src/cryptonote_core/tx_pool.cpp
View File

@ -220,7 +220,7 @@ namespace cryptonote
crypto::hash max_used_block_id = null_hash;
uint64_t max_used_block_height = 0;
cryptonote::txpool_tx_meta_t meta;
bool ch_inp_res = m_blockchain.check_tx_inputs(tx, max_used_block_height, max_used_block_id, tvc, kept_by_block);
bool ch_inp_res = check_tx_inputs([&tx]()->cryptonote::transaction&{ return tx; }, id, max_used_block_height, max_used_block_id, tvc, kept_by_block);
if(!ch_inp_res)
{
// if the transaction was valid before (kept_by_block), then it
@ -883,11 +883,15 @@ namespace cryptonote
//---------------------------------------------------------------------------------
bool tx_memory_pool::on_blockchain_inc(uint64_t new_block_height, const crypto::hash& top_block_id)
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
m_input_cache.clear();
return true;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::on_blockchain_dec(uint64_t new_block_height, const crypto::hash& top_block_id)
{
CRITICAL_REGION_LOCAL(m_transactions_lock);
m_input_cache.clear();
return true;
}
//---------------------------------------------------------------------------------
@ -927,7 +931,26 @@ namespace cryptonote
m_transactions_lock.unlock();
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::is_transaction_ready_to_go(txpool_tx_meta_t& txd, const cryptonote::blobdata &txblob, transaction &tx) const
bool tx_memory_pool::check_tx_inputs(const std::function<cryptonote::transaction&(void)> &get_tx, const crypto::hash &txid, uint64_t &max_used_block_height, crypto::hash &max_used_block_id, tx_verification_context &tvc, bool kept_by_block) const
{
if (!kept_by_block)
{
const std::unordered_map<crypto::hash, std::tuple<bool, tx_verification_context, uint64_t, crypto::hash>>::const_iterator i = m_input_cache.find(txid);
if (i != m_input_cache.end())
{
max_used_block_height = std::get<2>(i->second);
max_used_block_id = std::get<3>(i->second);
tvc = std::get<1>(i->second);
return std::get<0>(i->second);
}
}
bool ret = m_blockchain.check_tx_inputs(get_tx(), max_used_block_height, max_used_block_id, tvc, kept_by_block);
if (!kept_by_block)
m_input_cache.insert(std::make_pair(txid, std::make_tuple(ret, tvc, max_used_block_height, max_used_block_id)));
return ret;
}
//---------------------------------------------------------------------------------
bool tx_memory_pool::is_transaction_ready_to_go(txpool_tx_meta_t& txd, const crypto::hash &txid, const cryptonote::blobdata &txblob, transaction &tx) const
{
struct transction_parser
{
@ -956,7 +979,7 @@ namespace cryptonote
return false;//we already sure that this tx is broken for this height
tx_verification_context tvc;
if(!m_blockchain.check_tx_inputs(lazy_tx(), txd.max_used_block_height, txd.max_used_block_id, tvc))
if(!check_tx_inputs([&lazy_tx]()->cryptonote::transaction&{ return lazy_tx(); }, txid, 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);
@ -973,7 +996,7 @@ namespace cryptonote
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(lazy_tx(), txd.max_used_block_height, txd.max_used_block_id, tvc))
if(!check_tx_inputs([&lazy_tx]()->cryptonote::transaction&{ return lazy_tx(); }, txid, 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);
@ -1166,7 +1189,7 @@ namespace cryptonote
bool ready = false;
try
{
ready = is_transaction_ready_to_go(meta, txblob, tx);
ready = is_transaction_ready_to_go(meta, sorted_it->second, txblob, tx);
}
catch (const std::exception &e)
{

8
src/cryptonote_core/tx_pool.h
View File

@ -499,12 +499,13 @@ namespace cryptonote
* @brief check if a transaction is a valid candidate for inclusion in a block
*
* @param txd the transaction to check (and info about it)
* @param txid the txid of the transaction to check
* @param txblob the transaction blob to check
* @param tx the parsed transaction, if successful
*
* @return true if the transaction is good to go, otherwise false
*/
bool is_transaction_ready_to_go(txpool_tx_meta_t& txd, const cryptonote::blobdata &txblob, transaction &tx) const;
bool is_transaction_ready_to_go(txpool_tx_meta_t& txd, const crypto::hash &txid, const cryptonote::blobdata &txblob, transaction &tx) const;
/**
* @brief mark all transactions double spending the one passed
@ -557,6 +558,9 @@ private:
*/
sorted_tx_container::iterator find_tx_in_sorted_container(const crypto::hash& id) const;
//! cache/call Blockchain::check_tx_inputs results
bool check_tx_inputs(const std::function<cryptonote::transaction&(void)> &get_tx, const crypto::hash &txid, uint64_t &max_used_block_height, crypto::hash &max_used_block_id, tx_verification_context &tvc, bool kept_by_block = false) const;
//! transactions which are unlikely to be included in blocks
/*! These transactions are kept in RAM in case they *are* included
* in a block eventually, but this container is not saved to disk.
@ -567,6 +571,8 @@ private:
size_t m_txpool_max_size;
size_t m_txpool_size;
mutable std::unordered_map<crypto::hash, std::tuple<bool, tx_verification_context, uint64_t, crypto::hash>> m_input_cache;
};
}