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blockchain: remove the tx validation result cache 

As pointed out by smooth, a transaction's validity may change
over time as the blockchain changes.
This commit is contained in:
moneromooo-monero 2016-04-06 18:56:33 +01:00
parent e7c8a32a28
commit 4cfb4dff3e
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GPG Key ID: 686F07454D6CEFC3
2 changed files with 0 additions and 19 deletions
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18
src/cryptonote_core/blockchain.cpp
View File

@ -2015,18 +2015,12 @@ bool Blockchain::check_tx_inputs(const transaction& tx, uint64_t& max_used_block
TIME_MEASURE_START(a); TIME_MEASURE_START(a);
bool res = check_tx_inputs(tx, tvc, &max_used_block_height); bool res = check_tx_inputs(tx, tvc, &max_used_block_height);
TIME_MEASURE_FINISH(a); TIME_MEASURE_FINISH(a);
crypto::hash tx_prefix_hash = get_transaction_prefix_hash(tx);
if(m_show_time_stats) if(m_show_time_stats)
LOG_PRINT_L0("HASH: " << "+" << " VIN/VOUT: " << tx.vin.size() << "/" << tx.vout.size() << " H: " << max_used_block_height << " chcktx: " << a + m_fake_scan_time); LOG_PRINT_L0("HASH: " << "+" << " VIN/VOUT: " << tx.vin.size() << "/" << tx.vout.size() << " H: " << max_used_block_height << " chcktx: " << a + m_fake_scan_time);
if (!res) if (!res)
return false; return false;
// ND: Speedup:
// 1. keep a list of verified transactions, when the Blockchain tries to check a tx again,
// verify against list and skip if already verified to be correct.
m_check_tx_inputs_table.emplace(tx_prefix_hash, std::make_pair(res, max_used_block_height));
CHECK_AND_ASSERT_MES(max_used_block_height < m_db->height(), false, "internal error: max used block index=" << max_used_block_height << " is not less then blockchain size = " << m_db->height()); CHECK_AND_ASSERT_MES(max_used_block_height < m_db->height(), false, "internal error: max used block index=" << max_used_block_height << " is not less then blockchain size = " << m_db->height());
max_used_block_id = m_db->get_block_hash_from_height(max_used_block_height); max_used_block_id = m_db->get_block_hash_from_height(max_used_block_height);
return true; return true;
@ -2076,16 +2070,6 @@ bool Blockchain::check_tx_inputs(const transaction& tx, tx_verification_context
crypto::hash tx_prefix_hash = get_transaction_prefix_hash(tx); crypto::hash tx_prefix_hash = get_transaction_prefix_hash(tx);
auto its = m_check_tx_inputs_table.find(tx_prefix_hash);
if (its != m_check_tx_inputs_table.end())
{
if (!its->second.first)
return false;
if (pmax_used_block_height)
*pmax_used_block_height = its->second.second;
return true;
}
// from hard fork 2, we require mixin at least 2 unless one output cannot mix with 2 others // from hard fork 2, we require mixin at least 2 unless one output cannot mix with 2 others
// if one output cannot mix with 2 others, we accept at most 1 output that can mix // if one output cannot mix with 2 others, we accept at most 1 output that can mix
if (m_hardfork->get_current_version() >= 2) if (m_hardfork->get_current_version() >= 2)
@ -2967,7 +2951,6 @@ bool Blockchain::cleanup_handle_incoming_blocks(bool force_sync)
TIME_MEASURE_FINISH(t1); TIME_MEASURE_FINISH(t1);
m_blocks_longhash_table.clear(); m_blocks_longhash_table.clear();
m_scan_table.clear(); m_scan_table.clear();
m_check_tx_inputs_table.clear();
m_blocks_txs_check.clear(); m_blocks_txs_check.clear();
m_check_txin_table.clear(); m_check_txin_table.clear();
@ -3115,7 +3098,6 @@ bool Blockchain::prepare_handle_incoming_blocks(const std::list<block_complete_e
m_fake_pow_calc_time = 0; m_fake_pow_calc_time = 0;
m_scan_table.clear(); m_scan_table.clear();
m_check_tx_inputs_table.clear();
m_check_txin_table.clear(); m_check_txin_table.clear();
TIME_MEASURE_FINISH(prepare); TIME_MEASURE_FINISH(prepare);

1
src/cryptonote_core/blockchain.h
View File

@ -790,7 +790,6 @@ namespace cryptonote
// metadata containers // metadata containers
std::unordered_map<crypto::hash, std::unordered_map<crypto::key_image, std::vector<output_data_t>>> m_scan_table; std::unordered_map<crypto::hash, std::unordered_map<crypto::key_image, std::vector<output_data_t>>> m_scan_table;
std::unordered_map<crypto::hash, std::pair<bool, uint64_t>> m_check_tx_inputs_table;
std::unordered_map<crypto::hash, crypto::hash> m_blocks_longhash_table; std::unordered_map<crypto::hash, crypto::hash> m_blocks_longhash_table;
std::unordered_map<crypto::hash, std::unordered_map<crypto::key_image, bool>> m_check_txin_table; std::unordered_map<crypto::hash, std::unordered_map<crypto::key_image, bool>> m_check_txin_table;