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275894cdef
monero/src/blockchain_db/lmdb/db_lmdb.cpp
moneromooo-monero 275894cdef
blockchain: always select random outs using triangular distribution 
It was only used by the older blockchain_storage.
We also move the code to the calling blockchain level, to avoid
replicating the code in every DB implementation. This also makes
the get_random_out method obsolete, and we delete it.
2015-08-09 18:07:44 +01:00

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// Copyright (c) 2014, 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.
#include "db_lmdb.h"
#include <boost/filesystem.hpp>
#include <memory> // std::unique_ptr
#include <cstring> // memcpy
#include <random>
#include "cryptonote_core/cryptonote_format_utils.h"
#include "crypto/crypto.h"
#include "profile_tools.h"
using epee::string_tools::pod_to_hex;
namespace
{
template <typename T>
inline void throw0(const T &e)
{
LOG_PRINT_L0(e.what());
throw e;
}
template <typename T>
inline void throw1(const T &e)
{
LOG_PRINT_L1(e.what());
throw e;
}
// cursor needs to be closed when it goes out of scope,
// this helps if the function using it throws
struct lmdb_cur
{
lmdb_cur(MDB_txn* txn, MDB_dbi dbi)
{
if (mdb_cursor_open(txn, dbi, &m_cur))
throw0(cryptonote::DB_ERROR("Error opening db cursor"));
done = false;
}
~lmdb_cur()
{
close();
}
operator MDB_cursor*()
{
return m_cur;
}
operator MDB_cursor**()
{
return &m_cur;
}
void close()
{
if (!done)
{
mdb_cursor_close(m_cur);
done = true;
}
}
private:
MDB_cursor* m_cur;
bool done;
};
template<typename T>
struct MDB_val_copy: public MDB_val
{
MDB_val_copy(const T &t) :
t_copy(t)
{
mv_size = sizeof (T);
mv_data = &t_copy;
}
private:
T t_copy;
};
template<>
struct MDB_val_copy<cryptonote::blobdata>: public MDB_val
{
MDB_val_copy(const cryptonote::blobdata &bd) :
data(new char[bd.size()])
{
memcpy(data.get(), bd.data(), bd.size());
mv_size = bd.size();
mv_data = data.get();
}
private:
std::unique_ptr<char[]> data;
};
auto compare_uint64 = [](const MDB_val *a, const MDB_val *b)
{
const uint64_t va = *(const uint64_t*)a->mv_data;
const uint64_t vb = *(const uint64_t*)b->mv_data;
if (va < vb) return -1;
else if (va == vb) return 0;
else return 1;
};
int compare_hash32(const MDB_val *a, const MDB_val *b)
{
uint32_t *va = (uint32_t*) a->mv_data;
uint32_t *vb = (uint32_t*) b->mv_data;
for (int n = 7; n >= 0; n--)
{
if (va[n] == vb[n])
continue;
return va[n] < vb[n] ? -1 : 1;
}
return 0;
}
const char* const LMDB_BLOCKS = "blocks";
const char* const LMDB_BLOCK_TIMESTAMPS = "block_timestamps";
const char* const LMDB_BLOCK_HEIGHTS = "block_heights";
const char* const LMDB_BLOCK_HASHES = "block_hashes";
const char* const LMDB_BLOCK_SIZES = "block_sizes";
const char* const LMDB_BLOCK_DIFFS = "block_diffs";
const char* const LMDB_BLOCK_COINS = "block_coins";
const char* const LMDB_TXS = "txs";
const char* const LMDB_TX_UNLOCKS = "tx_unlocks";
const char* const LMDB_TX_HEIGHTS = "tx_heights";
const char* const LMDB_TX_OUTPUTS = "tx_outputs";
const char* const LMDB_OUTPUT_TXS = "output_txs";
const char* const LMDB_OUTPUT_INDICES = "output_indices";
const char* const LMDB_OUTPUT_AMOUNTS = "output_amounts";
const char* const LMDB_OUTPUT_KEYS = "output_keys";
const char* const LMDB_OUTPUTS = "outputs";
const char* const LMDB_OUTPUT_GINDICES = "output_gindices";
const char* const LMDB_SPENT_KEYS = "spent_keys";
inline void lmdb_db_open(MDB_txn* txn, const char* name, int flags, MDB_dbi& dbi, const std::string& error_string)
{
if (mdb_dbi_open(txn, name, flags, &dbi))
throw0(cryptonote::DB_OPEN_FAILURE(error_string.c_str()));
}
} // anonymous namespace
namespace cryptonote
{
std::atomic<uint64_t> mdb_txn_safe::num_active_txns{0};
std::atomic_flag mdb_txn_safe::creation_gate = ATOMIC_FLAG_INIT;
mdb_txn_safe::mdb_txn_safe() : m_txn(NULL)
{
while (creation_gate.test_and_set());
num_active_txns++;
creation_gate.clear();
}
mdb_txn_safe::~mdb_txn_safe()
{
LOG_PRINT_L3("mdb_txn_safe: destructor");
if (m_txn != NULL)
{
if (m_batch_txn) // this is a batch txn and should have been handled before this point for safety
{
LOG_PRINT_L0("WARNING: mdb_txn_safe: m_txn is a batch txn and it's not NULL in destructor - calling mdb_txn_abort()");
}
else
{
// Example of when this occurs: a lookup fails, so a read-only txn is
// aborted through this destructor. However, successful read-only txns
// ideally should have been committed when done and not end up here.
//
// NOTE: not sure if this is ever reached for a non-batch write
// transaction, but it's probably not ideal if it did.
LOG_PRINT_L3("mdb_txn_safe: m_txn not NULL in destructor - calling mdb_txn_abort()");
}
mdb_txn_abort(m_txn);
}
num_active_txns--;
}
void mdb_txn_safe::commit(std::string message)
{
if (message.size() == 0)
{
message = "Failed to commit a transaction to the db";
}
if (auto result = mdb_txn_commit(m_txn))
{
m_txn = NULL;
throw0(DB_ERROR((message + ": ").append(mdb_strerror(result)).c_str()));
}
m_txn = NULL;
}
void mdb_txn_safe::abort()
{
LOG_PRINT_L3("mdb_txn_safe: abort()");
if(m_txn != NULL)
{
mdb_txn_abort(m_txn);
m_txn = NULL;
}
else
{
LOG_PRINT_L0("WARNING: mdb_txn_safe: abort() called, but m_txn is NULL");
}
}
uint64_t mdb_txn_safe::num_active_tx() const
{
return num_active_txns;
}
void mdb_txn_safe::prevent_new_txns()
{
while (creation_gate.test_and_set());
}
void mdb_txn_safe::wait_no_active_txns()
{
while (num_active_txns > 0);
}
void mdb_txn_safe::allow_new_txns()
{
creation_gate.clear();
}
void BlockchainLMDB::do_resize(uint64_t increase_size)
{
CRITICAL_REGION_LOCAL(m_synchronization_lock);
const uint64_t add_size = 1LL << 30;
// check disk capacity
try
{
boost::filesystem::path path(m_folder);
boost::filesystem::space_info si = boost::filesystem::space(path);
if(si.available < add_size)
{
LOG_PRINT_RED_L0("!! WARNING: Insufficient free space to extend database !!: " << si.available / 1LL << 20L);
return;
}
}
catch(...)
{
// print something but proceed.
LOG_PRINT_YELLOW("Unable to query free disk space.", LOG_LEVEL_0);
}
MDB_envinfo mei;
mdb_env_info(m_env, &mei);
MDB_stat mst;
mdb_env_stat(m_env, &mst);
// add 1Gb per resize, instead of doing a percentage increase
uint64_t new_mapsize = (double) mei.me_mapsize + add_size;
// If given, use increase_size intead of above way of resizing.
// This is currently used for increasing by an estimated size at start of new
// batch txn.
if (increase_size > 0)
new_mapsize = mei.me_mapsize + increase_size;
new_mapsize += (new_mapsize % mst.ms_psize);
mdb_txn_safe::prevent_new_txns();
if (m_write_txn != nullptr)
{
if (m_batch_active)
{
throw0(DB_ERROR("lmdb resizing not yet supported when batch transactions enabled!"));
}
else
{
throw0(DB_ERROR("attempting resize with write transaction in progress, this should not happen!"));
}
}
mdb_txn_safe::wait_no_active_txns();
mdb_env_set_mapsize(m_env, new_mapsize);
LOG_PRINT_GREEN("LMDB Mapsize increased." << " Old: " << mei.me_mapsize / (1024 * 1024) << "MiB" << ", New: " << new_mapsize / (1024 * 1024) << "MiB", LOG_LEVEL_0);
mdb_txn_safe::allow_new_txns();
}
// threshold_size is used for batch transactions
bool BlockchainLMDB::need_resize(uint64_t threshold_size) const
{
#if defined(ENABLE_AUTO_RESIZE)
MDB_envinfo mei;
mdb_env_info(m_env, &mei);
MDB_stat mst;
mdb_env_stat(m_env, &mst);
// size_used doesn't include data yet to be committed, which can be
// significant size during batch transactions. For that, we estimate the size
// needed at the beginning of the batch transaction and pass in the
// additional size needed.
uint64_t size_used = mst.ms_psize * mei.me_last_pgno;
LOG_PRINT_L1("DB map size: " << mei.me_mapsize);
LOG_PRINT_L1("Space used: " << size_used);
LOG_PRINT_L1("Space remaining: " << mei.me_mapsize - size_used);
LOG_PRINT_L1("Size threshold: " << threshold_size);
LOG_PRINT_L1("Percent used: " << (double)size_used/mei.me_mapsize << " Percent threshold: " << RESIZE_PERCENT);
if (threshold_size > 0)
{
if (mei.me_mapsize - size_used < threshold_size)
{
LOG_PRINT_L1("Threshold met (size-based)");
return true;
}
else
return false;
}
std::mt19937 engine(std::random_device{}());
std::uniform_real_distribution<double> fdis(0.6, 0.9);
double resize_percent = fdis(engine);
if ((double)size_used / mei.me_mapsize > resize_percent)
{
LOG_PRINT_L1("Threshold met (percent-based)");
return true;
}
return false;
#else
return false;
#endif
}
void BlockchainLMDB::check_and_resize_for_batch(uint64_t batch_num_blocks)
{
LOG_PRINT_L1("[batch] checking DB size");
const uint64_t min_increase_size = 128 * (1 << 20);
uint64_t threshold_size = 0;
uint64_t increase_size = 0;
if (batch_num_blocks > 0)
{
threshold_size = get_estimated_batch_size(batch_num_blocks);
LOG_PRINT_L1("calculated batch size: " << threshold_size);
// The increased DB size could be a multiple of threshold_size, a fixed
// size increase (> threshold_size), or other variations.
//
// Currently we use the greater of threshold size and a minimum size. The
// minimum size increase is used to avoid frequent resizes when the batch
// size is set to a very small numbers of blocks.
increase_size = (threshold_size > min_increase_size) ? threshold_size : min_increase_size;
LOG_PRINT_L1("increase size: " << increase_size);
}
// if threshold_size is 0 (i.e. number of blocks for batch not passed in), it
// will fall back to the percent-based threshold check instead of the
// size-based check
if (need_resize(threshold_size))
{
LOG_PRINT_L0("[batch] DB resize needed");
do_resize(increase_size);
}
}
uint64_t BlockchainLMDB::get_estimated_batch_size(uint64_t batch_num_blocks) const
{
uint64_t threshold_size = 0;
// batch size estimate * batch safety factor = final size estimate
// Takes into account "reasonable" block size increases in batch.
float batch_safety_factor = 1.7f;
// estimate of stored block expanded from raw block, including denormalization and db overhead.
// Note that this probably doesn't grow linearly with block size.
float db_expand_factor = 4.5f;
uint64_t num_prev_blocks = 500;
// For resizing purposes, allow for at least 4k average block size.
uint64_t min_block_size = 4 * 1024;
uint64_t block_stop = m_height - 1;
uint64_t block_start = 0;
if (block_stop >= num_prev_blocks)
block_start = block_stop - num_prev_blocks + 1;
uint32_t num_blocks_used = 0;
uint64_t total_block_size = 0;
for (uint64_t block_num = block_start; block_num <= block_stop; ++block_num)
{
uint32_t block_size = get_block_size(block_num);
total_block_size += block_size;
// Track number of blocks being totalled here instead of assuming, in case
// some blocks were to be skipped for being outliers.
++num_blocks_used;
}
size_t avg_block_size = total_block_size / num_blocks_used;
LOG_PRINT_L1("average block size across recent " << num_blocks_used << " blocks: " << avg_block_size);
if (avg_block_size < min_block_size)
avg_block_size = min_block_size;
LOG_PRINT_L1("estimated average block size for batch: " << avg_block_size);
threshold_size = avg_block_size * db_expand_factor * batch_num_blocks;
threshold_size = threshold_size * batch_safety_factor;
return threshold_size;
}
void BlockchainLMDB::add_block(const block& blk, const size_t& block_size, const difficulty_type& cumulative_difficulty, const uint64_t& coins_generated,
const crypto::hash& blk_hash)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
MDB_val_copy<crypto::hash> val_h(blk_hash);
MDB_val unused;
if (mdb_get(*m_write_txn, m_block_heights, &val_h, &unused) == 0)
throw1(BLOCK_EXISTS("Attempting to add block that's already in the db"));
if (m_height > 0)
{
MDB_val_copy<crypto::hash> parent_key(blk.prev_id);
MDB_val parent_h;
if (mdb_get(*m_write_txn, m_block_heights, &parent_key, &parent_h))
{
LOG_PRINT_L3("m_height: " << m_height);
LOG_PRINT_L3("parent_key: " << blk.prev_id);
throw0(DB_ERROR("Failed to get top block hash to check for new block's parent"));
}
uint64_t parent_height = *(const uint64_t *)parent_h.mv_data;
if (parent_height != m_height - 1)
throw0(BLOCK_PARENT_DNE("Top block is not new block's parent"));
}
int result = 0;
MDB_val_copy<uint64_t> key(m_height);
MDB_val_copy<blobdata> blob(block_to_blob(blk));
result = mdb_put(*m_write_txn, m_blocks, &key, &blob, 0);
if (result)
throw0(DB_ERROR(std::string("Failed to add block blob to db transaction: ").append(mdb_strerror(result)).c_str()));
MDB_val_copy<size_t> sz(block_size);
result = mdb_put(*m_write_txn, m_block_sizes, &key, &sz, 0);
if (result)
throw0(DB_ERROR(std::string("Failed to add block size to db transaction: ").append(mdb_strerror(result)).c_str()));
MDB_val_copy<uint64_t> ts(blk.timestamp);
result = mdb_put(*m_write_txn, m_block_timestamps, &key, &ts, 0);
if (result)
throw0(DB_ERROR(std::string("Failed to add block timestamp to db transaction: ").append(mdb_strerror(result)).c_str()));
MDB_val_copy<difficulty_type> diff(cumulative_difficulty);
result = mdb_put(*m_write_txn, m_block_diffs, &key, &diff, 0);
if (result)
throw0(DB_ERROR(std::string("Failed to add block cumulative difficulty to db transaction: ").append(mdb_strerror(result)).c_str()));
MDB_val_copy<uint64_t> coinsgen(coins_generated);
result = mdb_put(*m_write_txn, m_block_coins, &key, &coinsgen, 0);
if (result)
throw0(DB_ERROR(std::string("Failed to add block total generated coins to db transaction: ").append(mdb_strerror(result)).c_str()));
result = mdb_put(*m_write_txn, m_block_heights, &val_h, &key, 0);
if (result)
throw0(DB_ERROR(std::string("Failed to add block height by hash to db transaction: ").append(mdb_strerror(result)).c_str()));
result = mdb_put(*m_write_txn, m_block_hashes, &key, &val_h, 0);
if (result)
throw0(DB_ERROR(std::string("Failed to add block hash to db transaction: ").append(mdb_strerror(result)).c_str()));
}
void BlockchainLMDB::remove_block()
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
if (m_height == 0)
throw0(BLOCK_DNE ("Attempting to remove block from an empty blockchain"));
MDB_val_copy<uint64_t> k(m_height - 1);
MDB_val h;
if (mdb_get(*m_write_txn, m_block_hashes, &k, &h))
throw1(BLOCK_DNE("Attempting to remove block that's not in the db"));
if (mdb_del(*m_write_txn, m_blocks, &k, NULL))
throw1(DB_ERROR("Failed to add removal of block to db transaction"));
if (mdb_del(*m_write_txn, m_block_sizes, &k, NULL))
throw1(DB_ERROR("Failed to add removal of block size to db transaction"));
if (mdb_del(*m_write_txn, m_block_diffs, &k, NULL))
throw1(DB_ERROR("Failed to add removal of block cumulative difficulty to db transaction"));
if (mdb_del(*m_write_txn, m_block_coins, &k, NULL))
throw1(DB_ERROR("Failed to add removal of block total generated coins to db transaction"));
if (mdb_del(*m_write_txn, m_block_timestamps, &k, NULL))
throw1(DB_ERROR("Failed to add removal of block timestamp to db transaction"));
if (mdb_del(*m_write_txn, m_block_heights, &h, NULL))
throw1(DB_ERROR("Failed to add removal of block height by hash to db transaction"));
if (mdb_del(*m_write_txn, m_block_hashes, &k, NULL))
throw1(DB_ERROR("Failed to add removal of block hash to db transaction"));
}
void BlockchainLMDB::add_transaction_data(const crypto::hash& blk_hash, const transaction& tx, const crypto::hash& tx_hash)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
int result = 0;
MDB_val_copy<crypto::hash> val_h(tx_hash);
MDB_val unused;
if (mdb_get(*m_write_txn, m_txs, &val_h, &unused) == 0)
throw1(TX_EXISTS("Attempting to add transaction that's already in the db"));
MDB_val_copy<blobdata> blob(tx_to_blob(tx));
result = mdb_put(*m_write_txn, m_txs, &val_h, &blob, 0);
if (result)
throw0(DB_ERROR(std::string("Failed to add tx blob to db transaction: ").append(mdb_strerror(result)).c_str()));
MDB_val_copy<uint64_t> height(m_height);
result = mdb_put(*m_write_txn, m_tx_heights, &val_h, &height, 0);
if (result)
throw0(DB_ERROR(std::string("Failed to add tx block height to db transaction: ").append(mdb_strerror(result)).c_str()));
MDB_val_copy<uint64_t> unlock_time(tx.unlock_time);
result = mdb_put(*m_write_txn, m_tx_unlocks, &val_h, &unlock_time, 0);
if (result)
throw0(DB_ERROR(std::string("Failed to add tx unlock time to db transaction: ").append(mdb_strerror(result)).c_str()));
}
void BlockchainLMDB::remove_transaction_data(const crypto::hash& tx_hash, const transaction& tx)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
MDB_val_copy<crypto::hash> val_h(tx_hash);
MDB_val unused;
if (mdb_get(*m_write_txn, m_txs, &val_h, &unused))
throw1(TX_DNE("Attempting to remove transaction that isn't in the db"));
if (mdb_del(*m_write_txn, m_txs, &val_h, NULL))
throw1(DB_ERROR("Failed to add removal of tx to db transaction"));
if (mdb_del(*m_write_txn, m_tx_unlocks, &val_h, NULL))
throw1(DB_ERROR("Failed to add removal of tx unlock time to db transaction"));
if (mdb_del(*m_write_txn, m_tx_heights, &val_h, NULL))
throw1(DB_ERROR("Failed to add removal of tx block height to db transaction"));
remove_tx_outputs(tx_hash, tx);
if (mdb_del(*m_write_txn, m_tx_outputs, &val_h, NULL))
throw1(DB_ERROR("Failed to add removal of tx outputs to db transaction"));
}
void BlockchainLMDB::add_output(const crypto::hash& tx_hash, const tx_out& tx_output, const uint64_t& local_index, const uint64_t unlock_time)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
int result = 0;
MDB_val_copy<uint64_t> k(m_num_outputs);
MDB_val_copy<crypto::hash> v(tx_hash);
result = mdb_put(*m_write_txn, m_output_txs, &k, &v, 0);
if (result)
throw0(DB_ERROR(std::string("Failed to add output tx hash to db transaction: ").append(mdb_strerror(result)).c_str()));
result = mdb_put(*m_write_txn, m_tx_outputs, &v, &k, 0);
if (result)
throw0(DB_ERROR(std::string("Failed to add <tx hash, global output index> to db transaction: ").append(mdb_strerror(result)).c_str()));
MDB_val_copy<uint64_t> val_local_index(local_index);
result = mdb_put(*m_write_txn, m_output_indices, &k, &val_local_index, 0);
if (result)
throw0(DB_ERROR(std::string("Failed to add tx output index to db transaction: ").append(mdb_strerror(result)).c_str()));
MDB_val_copy<uint64_t> val_amount(tx_output.amount);
result = mdb_put(*m_write_txn, m_output_amounts, &val_amount, &k, 0);
if (result)
throw0(DB_ERROR(std::string("Failed to add output amount to db transaction: ").append(mdb_strerror(result)).c_str()));
if (tx_output.target.type() == typeid(txout_to_key))
{
output_data_t od;
od.pubkey = boost::get < txout_to_key > (tx_output.target).key;
od.unlock_time = unlock_time;
od.height = m_height;
MDB_val_copy<output_data_t> data(od);
//MDB_val_copy<crypto::public_key> val_pubkey(boost::get<txout_to_key>(tx_output.target).key);
if (mdb_put(*m_write_txn, m_output_keys, &k, &data, 0))
throw0(DB_ERROR("Failed to add output pubkey to db transaction"));
}
/****** Uncomment if ever outputs actually need to be stored in this manner
*
blobdata b = output_to_blob(tx_output);
v.mv_size = b.size();
v.mv_data = &b;
if (mdb_put(*m_write_txn, m_outputs, &k, &v, 0))
throw0(DB_ERROR("Failed to add output to db transaction"));
if (mdb_put(*m_write_txn, m_output_gindices, &v, &k, 0))
throw0(DB_ERROR("Failed to add output global index to db transaction"));
************************************************************************/
m_num_outputs++;
}
void BlockchainLMDB::remove_tx_outputs(const crypto::hash& tx_hash, const transaction& tx)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
lmdb_cur cur(*m_write_txn, m_tx_outputs);
MDB_val_copy<crypto::hash> k(tx_hash);
MDB_val v;
auto result = mdb_cursor_get(cur, &k, &v, MDB_SET);
if (result == MDB_NOTFOUND)
{
LOG_ERROR("Attempting to remove a tx's outputs, but none found. Continuing, but...be wary, because that's weird.");
}
else if (result)
{
throw0(DB_ERROR("DB error attempting to get an output"));
}
else
{
size_t num_elems = 0;
mdb_cursor_count(cur, &num_elems);
mdb_cursor_get(cur, &k, &v, MDB_FIRST_DUP);
for (uint64_t i = 0; i < num_elems; ++i)
{
const tx_out tx_output = tx.vout[i];
remove_output(*(const uint64_t*)v.mv_data, tx_output.amount);
if (i < num_elems - 1)
{
mdb_cursor_get(cur, &k, &v, MDB_NEXT_DUP);
}
}
}
cur.close();
}
// TODO: probably remove this function
void BlockchainLMDB::remove_output(const tx_out& tx_output)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__ << " (unused version - does nothing)");
return;
}
void BlockchainLMDB::remove_output(const uint64_t& out_index, const uint64_t amount)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
MDB_val_copy<uint64_t> k(out_index);
/****** Uncomment if ever outputs actually need to be stored in this manner
blobdata b;
t_serializable_object_to_blob(tx_output, b);
k.mv_size = b.size();
k.mv_data = &b;
if (mdb_get(*m_write_txn, m_output_gindices, &k, &v))
throw1(OUTPUT_DNE("Attempting to remove output that does not exist"));
uint64_t gindex = *(uint64_t*)v.mv_data;
auto result = mdb_del(*m_write_txn, m_output_gindices, &k, NULL);
if (result != 0 && result != MDB_NOTFOUND)
throw1(DB_ERROR("Error adding removal of output global index to db transaction"));
result = mdb_del(*m_write_txn, m_outputs, &v, NULL);
if (result != 0 && result != MDB_NOTFOUND)
throw1(DB_ERROR("Error adding removal of output to db transaction"));
*********************************************************************/
auto result = mdb_del(*m_write_txn, m_output_indices, &k, NULL);
if (result == MDB_NOTFOUND)
{
LOG_PRINT_L0("Unexpected: global output index not found in m_output_indices");
}
else if (result)
{
throw1(DB_ERROR("Error adding removal of output tx index to db transaction"));
}
result = mdb_del(*m_write_txn, m_output_txs, &k, NULL);
// if (result != 0 && result != MDB_NOTFOUND)
// throw1(DB_ERROR("Error adding removal of output tx hash to db transaction"));
if (result == MDB_NOTFOUND)
{
LOG_PRINT_L0("Unexpected: global output index not found in m_output_txs");
}
else if (result)
{
throw1(DB_ERROR("Error adding removal of output tx hash to db transaction"));
}
result = mdb_del(*m_write_txn, m_output_keys, &k, NULL);
if (result == MDB_NOTFOUND)
{
LOG_PRINT_L0("Unexpected: global output index not found in m_output_keys");
}
else if (result)
throw1(DB_ERROR("Error adding removal of output pubkey to db transaction"));
remove_amount_output_index(amount, out_index);
m_num_outputs--;
}
void BlockchainLMDB::remove_amount_output_index(const uint64_t amount, const uint64_t global_output_index)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
lmdb_cur cur(*m_write_txn, m_output_amounts);
MDB_val_copy<uint64_t> k(amount);
MDB_val v;
auto result = mdb_cursor_get(cur, &k, &v, MDB_SET);
if (result == MDB_NOTFOUND)
throw1(OUTPUT_DNE("Attempting to get an output index by amount and amount index, but amount not found"));
else if (result)
throw0(DB_ERROR("DB error attempting to get an output"));
size_t num_elems = 0;
mdb_cursor_count(cur, &num_elems);
mdb_cursor_get(cur, &k, &v, MDB_FIRST_DUP);
uint64_t amount_output_index = 0;
uint64_t goi = 0;
bool found_index = false;
for (uint64_t i = 0; i < num_elems; ++i)
{
mdb_cursor_get(cur, &k, &v, MDB_GET_CURRENT);
goi = *(const uint64_t *)v.mv_data;
if (goi == global_output_index)
{
amount_output_index = i;
found_index = true;
break;
}
mdb_cursor_get(cur, &k, &v, MDB_NEXT_DUP);
}
if (found_index)
{
// found the amount output index
// now delete it
result = mdb_cursor_del(cur, 0);
if (result)
throw0(DB_ERROR(std::string("Error deleting amount output index ").append(boost::lexical_cast<std::string>(amount_output_index)).c_str()));
}
else
{
// not found
cur.close();
throw1(OUTPUT_DNE("Failed to find amount output index"));
}
cur.close();
}
void BlockchainLMDB::add_spent_key(const crypto::key_image& k_image)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
MDB_val_copy<crypto::key_image> val_key(k_image);
MDB_val unused;
if (mdb_get(*m_write_txn, m_spent_keys, &val_key, &unused) == 0)
throw1(KEY_IMAGE_EXISTS("Attempting to add spent key image that's already in the db"));
char anything = '\0';
unused.mv_size = sizeof(char);
unused.mv_data = &anything;
if (auto result = mdb_put(*m_write_txn, m_spent_keys, &val_key, &unused, 0))
throw1(DB_ERROR(std::string("Error adding spent key image to db transaction: ").append(mdb_strerror(result)).c_str()));
}
void BlockchainLMDB::remove_spent_key(const crypto::key_image& k_image)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
MDB_val_copy<crypto::key_image> k(k_image);
auto result = mdb_del(*m_write_txn, m_spent_keys, &k, NULL);
if (result != 0 && result != MDB_NOTFOUND)
throw1(DB_ERROR("Error adding removal of key image to db transaction"));
}
blobdata BlockchainLMDB::output_to_blob(const tx_out& output) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
blobdata b;
if (!t_serializable_object_to_blob(output, b))
throw1(DB_ERROR("Error serializing output to blob"));
return b;
}
tx_out BlockchainLMDB::output_from_blob(const blobdata& blob) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
std::stringstream ss;
ss << blob;
binary_archive<false> ba(ss);
tx_out o;
if (!(::serialization::serialize(ba, o)))
throw1(DB_ERROR("Error deserializing tx output blob"));
return o;
}
uint64_t BlockchainLMDB::get_output_global_index(const uint64_t& amount, const uint64_t& index)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
std::vector <uint64_t> offsets;
std::vector <uint64_t> global_indices;
offsets.push_back(index);
get_output_global_indices(amount, offsets, global_indices);
if (!global_indices.size())
throw1(OUTPUT_DNE("Attempting to get an output index by amount and amount index, but amount not found"));
return global_indices[0];
}
void BlockchainLMDB::check_open() const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
if (!m_open)
throw0(DB_ERROR("DB operation attempted on a not-open DB instance"));
}
BlockchainLMDB::~BlockchainLMDB()
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
// batch transaction shouldn't be active at this point. If it is, consider it aborted.
if (m_batch_active)
batch_abort();
}
BlockchainLMDB::BlockchainLMDB(bool batch_transactions)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
// initialize folder to something "safe" just in case
// someone accidentally misuses this class...
m_folder = "thishsouldnotexistbecauseitisgibberish";
m_open = false;
m_batch_transactions = batch_transactions;
m_write_txn = nullptr;
m_write_batch_txn = nullptr;
m_batch_active = false;
m_height = 0;
}
void BlockchainLMDB::open(const std::string& filename, const int mdb_flags)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
if (m_open)
throw0(DB_OPEN_FAILURE("Attempted to open db, but it's already open"));
boost::filesystem::path direc(filename);
if (boost::filesystem::exists(direc))
{
if (!boost::filesystem::is_directory(direc))
throw0(DB_OPEN_FAILURE("LMDB needs a directory path, but a file was passed"));
}
else
{
if (!boost::filesystem::create_directory(direc))
throw0(DB_OPEN_FAILURE(std::string("Failed to create directory ").append(filename).c_str()));
}
// check for existing LMDB files in base directory
boost::filesystem::path old_files = direc.parent_path();
if (boost::filesystem::exists(old_files / "data.mdb") || boost::filesystem::exists(old_files / "lock.mdb"))
{
LOG_PRINT_L0("Found existing LMDB files in " << old_files.string());
LOG_PRINT_L0("Move data.mdb and/or lock.mdb to " << filename << ", or delete them, and then restart");
throw DB_ERROR("Database could not be opened");
}
m_folder = filename;
// set up lmdb environment
if (mdb_env_create(&m_env))
throw0(DB_ERROR("Failed to create lmdb environment"));
if (mdb_env_set_maxdbs(m_env, 20))
throw0(DB_ERROR("Failed to set max number of dbs"));
size_t mapsize = DEFAULT_MAPSIZE;
if (auto result = mdb_env_open(m_env, filename.c_str(), mdb_flags, 0644))
throw0(DB_ERROR(std::string("Failed to open lmdb environment: ").append(mdb_strerror(result)).c_str()));
MDB_envinfo mei;
mdb_env_info(m_env, &mei);
uint64_t cur_mapsize = (double)mei.me_mapsize;
if (cur_mapsize < mapsize)
{
if (auto result = mdb_env_set_mapsize(m_env, mapsize))
throw0(DB_ERROR(std::string("Failed to set max memory map size: ").append(mdb_strerror(result)).c_str()));
mdb_env_info(m_env, &mei);
cur_mapsize = (double)mei.me_mapsize;
LOG_PRINT_L1("LMDB memory map size: " << cur_mapsize);
}
if (need_resize())
{
LOG_PRINT_L0("LMDB memory map needs resized, doing that now.");
do_resize();
}
int txn_flags = 0;
if (mdb_flags & MDB_RDONLY)
txn_flags |= MDB_RDONLY;
// get a read/write MDB_txn, depending on mdb_flags
mdb_txn_safe txn;
if (mdb_txn_begin(m_env, NULL, txn_flags, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
// open necessary databases, and set properties as needed
// uses macros to avoid having to change things too many places
lmdb_db_open(txn, LMDB_BLOCKS, MDB_INTEGERKEY | MDB_CREATE, m_blocks, "Failed to open db handle for m_blocks");
lmdb_db_open(txn, LMDB_BLOCK_TIMESTAMPS, MDB_INTEGERKEY | MDB_CREATE, m_block_timestamps, "Failed to open db handle for m_block_timestamps");
lmdb_db_open(txn, LMDB_BLOCK_HEIGHTS, MDB_CREATE, m_block_heights, "Failed to open db handle for m_block_heights");
lmdb_db_open(txn, LMDB_BLOCK_HASHES, MDB_INTEGERKEY | MDB_CREATE, m_block_hashes, "Failed to open db handle for m_block_hashes");
lmdb_db_open(txn, LMDB_BLOCK_SIZES, MDB_INTEGERKEY | MDB_CREATE, m_block_sizes, "Failed to open db handle for m_block_sizes");
lmdb_db_open(txn, LMDB_BLOCK_DIFFS, MDB_INTEGERKEY | MDB_CREATE, m_block_diffs, "Failed to open db handle for m_block_diffs");
lmdb_db_open(txn, LMDB_BLOCK_COINS, MDB_INTEGERKEY | MDB_CREATE, m_block_coins, "Failed to open db handle for m_block_coins");
lmdb_db_open(txn, LMDB_TXS, MDB_CREATE, m_txs, "Failed to open db handle for m_txs");
lmdb_db_open(txn, LMDB_TX_UNLOCKS, MDB_CREATE, m_tx_unlocks, "Failed to open db handle for m_tx_unlocks");
lmdb_db_open(txn, LMDB_TX_HEIGHTS, MDB_CREATE, m_tx_heights, "Failed to open db handle for m_tx_heights");
lmdb_db_open(txn, LMDB_TX_OUTPUTS, MDB_DUPSORT | MDB_CREATE, m_tx_outputs, "Failed to open db handle for m_tx_outputs");
lmdb_db_open(txn, LMDB_OUTPUT_TXS, MDB_INTEGERKEY | MDB_CREATE, m_output_txs, "Failed to open db handle for m_output_txs");
lmdb_db_open(txn, LMDB_OUTPUT_INDICES, MDB_INTEGERKEY | MDB_CREATE, m_output_indices, "Failed to open db handle for m_output_indices");
lmdb_db_open(txn, LMDB_OUTPUT_AMOUNTS, MDB_INTEGERKEY | MDB_DUPSORT | MDB_DUPFIXED | MDB_CREATE, m_output_amounts, "Failed to open db handle for m_output_amounts");
lmdb_db_open(txn, LMDB_OUTPUT_KEYS, MDB_INTEGERKEY | MDB_CREATE, m_output_keys, "Failed to open db handle for m_output_keys");
/*************** not used, but kept for posterity
lmdb_db_open(txn, LMDB_OUTPUTS, MDB_INTEGERKEY | MDB_CREATE, m_outputs, "Failed to open db handle for m_outputs");
lmdb_db_open(txn, LMDB_OUTPUT_GINDICES, MDB_CREATE, m_output_gindices, "Failed to open db handle for m_output_gindices");
*************************************************/
lmdb_db_open(txn, LMDB_SPENT_KEYS, MDB_CREATE, m_spent_keys, "Failed to open db handle for m_spent_keys");
mdb_set_dupsort(txn, m_output_amounts, compare_uint64);
mdb_set_dupsort(txn, m_tx_outputs, compare_uint64);
mdb_set_compare(txn, m_spent_keys, compare_hash32);
mdb_set_compare(txn, m_block_heights, compare_hash32);
mdb_set_compare(txn, m_txs, compare_hash32);
mdb_set_compare(txn, m_tx_unlocks, compare_hash32);
mdb_set_compare(txn, m_tx_heights, compare_hash32);
// get and keep current height
MDB_stat db_stats;
if (mdb_stat(txn, m_blocks, &db_stats))
throw0(DB_ERROR("Failed to query m_blocks"));
LOG_PRINT_L2("Setting m_height to: " << db_stats.ms_entries);
m_height = db_stats.ms_entries;
// get and keep current number of outputs
if (mdb_stat(txn, m_output_indices, &db_stats))
throw0(DB_ERROR("Failed to query m_output_indices"));
m_num_outputs = db_stats.ms_entries;
// ND: This "new" version of the lmdb database is incompatible with
// the previous version. Ensure that the output_keys database is
// sizeof(output_data_t) in length. Otherwise, inform user and
// terminate.
if(m_height > 0)
{
MDB_val_copy<uint64_t> k(0);
MDB_val v;
auto get_result = mdb_get(txn, m_output_keys, &k, &v);
if(get_result != MDB_SUCCESS)
{
txn.abort();
m_open = false;
return;
}
// LOG_PRINT_L0("Output keys size: " << v.mv_size);
if(v.mv_size != sizeof(output_data_t))
{
txn.abort();
mdb_env_close(m_env);
m_open = false;
LOG_PRINT_RED_L0("Existing lmdb database is incompatible with this version.");
LOG_PRINT_RED_L0("Please delete the existing database and resync.");
return;
}
}
// commit the transaction
txn.commit();
m_open = true;
// from here, init should be finished
}
void BlockchainLMDB::close()
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
if (m_batch_active)
{
LOG_PRINT_L3("close() first calling batch_abort() due to active batch transaction");
batch_abort();
}
this->sync();
// FIXME: not yet thread safe!!! Use with care.
mdb_env_close(m_env);
}
void BlockchainLMDB::sync()
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
// Does nothing unless LMDB environment was opened with MDB_NOSYNC or in part
// MDB_NOMETASYNC. Force flush to be synchronous.
if (auto result = mdb_env_sync(m_env, true))
{
throw0(DB_ERROR(std::string("Failed to sync database: ").append(mdb_strerror(result)).c_str()));
}
}
void BlockchainLMDB::reset()
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
// TODO: this
}
std::vector<std::string> BlockchainLMDB::get_filenames() const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
std::vector<std::string> filenames;
boost::filesystem::path datafile(m_folder);
datafile /= "data.mdb";
boost::filesystem::path lockfile(m_folder);
lockfile /= "lock.mdb";
filenames.push_back(datafile.string());
filenames.push_back(lockfile.string());
return filenames;
}
std::string BlockchainLMDB::get_db_name() const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
return std::string("lmdb");
}
// TODO: this?
bool BlockchainLMDB::lock()
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
return false;
}
// TODO: this?
void BlockchainLMDB::unlock()
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
}
bool BlockchainLMDB::block_exists(const crypto::hash& h) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
MDB_val_copy<crypto::hash> key(h);
MDB_val result;
auto get_result = mdb_get(txn, m_block_heights, &key, &result);
if (get_result == MDB_NOTFOUND)
{
txn.commit();
LOG_PRINT_L3("Block with hash " << epee::string_tools::pod_to_hex(h) << " not found in db");
return false;
}
else if (get_result)
throw0(DB_ERROR("DB error attempting to fetch block index from hash"));
txn.commit();
return true;
}
block BlockchainLMDB::get_block(const crypto::hash& h) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
return get_block_from_height(get_block_height(h));
}
uint64_t BlockchainLMDB::get_block_height(const crypto::hash& h) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
MDB_val_copy<crypto::hash> key(h);
MDB_val result;
auto get_result = mdb_get(txn, m_block_heights, &key, &result);
if (get_result == MDB_NOTFOUND)
throw1(BLOCK_DNE("Attempted to retrieve non-existent block height"));
else if (get_result)
throw0(DB_ERROR("Error attempting to retrieve a block height from the db"));
txn.commit();
return *(const uint64_t*)result.mv_data;
}
block_header BlockchainLMDB::get_block_header(const crypto::hash& h) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
// block_header object is automatically cast from block object
return get_block(h);
}
block BlockchainLMDB::get_block_from_height(const uint64_t& height) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
MDB_val_copy<uint64_t> key(height);
MDB_val result;
auto get_result = mdb_get(txn, m_blocks, &key, &result);
if (get_result == MDB_NOTFOUND)
{
throw0(DB_ERROR(std::string("Attempt to get block from height ").append(boost::lexical_cast<std::string>(height)).append(" failed -- block not in db").c_str()));
}
else if (get_result)
throw0(DB_ERROR("Error attempting to retrieve a block from the db"));
txn.commit();
blobdata bd;
bd.assign(reinterpret_cast<char*>(result.mv_data), result.mv_size);
block b;
if (!parse_and_validate_block_from_blob(bd, b))
throw0(DB_ERROR("Failed to parse block from blob retrieved from the db"));
return b;
}
uint64_t BlockchainLMDB::get_block_timestamp(const uint64_t& height) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
mdb_txn_safe* txn_ptr = &txn;
if (m_batch_active)
txn_ptr = m_write_txn;
else
{
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
}
MDB_val_copy<uint64_t> key(height);
MDB_val result;
auto get_result = mdb_get(*txn_ptr, m_block_timestamps, &key, &result);
if (get_result == MDB_NOTFOUND)
{
throw0(DB_ERROR(std::string("Attempt to get timestamp from height ").append(boost::lexical_cast<std::string>(height)).append(" failed -- timestamp not in db").c_str()));
}
else if (get_result)
throw0(DB_ERROR("Error attempting to retrieve a timestamp from the db"));
if (! m_batch_active)
txn.commit();
return *(const uint64_t*)result.mv_data;
}
uint64_t BlockchainLMDB::get_top_block_timestamp() const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
// if no blocks, return 0
if (m_height == 0)
{
return 0;
}
return get_block_timestamp(m_height - 1);
}
size_t BlockchainLMDB::get_block_size(const uint64_t& height) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
mdb_txn_safe* txn_ptr = &txn;
if (m_batch_active)
txn_ptr = m_write_txn;
else
{
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
}
MDB_val_copy<uint64_t> key(height);
MDB_val result;
auto get_result = mdb_get(*txn_ptr, m_block_sizes, &key, &result);
if (get_result == MDB_NOTFOUND)
{
throw0(DB_ERROR(std::string("Attempt to get block size from height ").append(boost::lexical_cast<std::string>(height)).append(" failed -- block size not in db").c_str()));
}
else if (get_result)
throw0(DB_ERROR("Error attempting to retrieve a block size from the db"));
if (! m_batch_active)
txn.commit();
return *(const size_t*)result.mv_data;
}
difficulty_type BlockchainLMDB::get_block_cumulative_difficulty(const uint64_t& height) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__ << " height: " << height);
check_open();
mdb_txn_safe txn;
mdb_txn_safe* txn_ptr = &txn;
if (m_batch_active)
txn_ptr = m_write_txn;
else
{
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
}
MDB_val_copy<uint64_t> key(height);
MDB_val result;
auto get_result = mdb_get(*txn_ptr, m_block_diffs, &key, &result);
if (get_result == MDB_NOTFOUND)
{
throw0(DB_ERROR(std::string("Attempt to get cumulative difficulty from height ").append(boost::lexical_cast<std::string>(height)).append(" failed -- difficulty not in db").c_str()));
}
else if (get_result)
throw0(DB_ERROR("Error attempting to retrieve a cumulative difficulty from the db"));
if (! m_batch_active)
txn.commit();
return *(difficulty_type*)result.mv_data;
}
difficulty_type BlockchainLMDB::get_block_difficulty(const uint64_t& height) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
difficulty_type diff1 = 0;
difficulty_type diff2 = 0;
diff1 = get_block_cumulative_difficulty(height);
if (height != 0)
{
diff2 = get_block_cumulative_difficulty(height - 1);
}
return diff1 - diff2;
}
uint64_t BlockchainLMDB::get_block_already_generated_coins(const uint64_t& height) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
mdb_txn_safe* txn_ptr = &txn;
if (m_batch_active)
txn_ptr = m_write_txn;
else
{
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
}
MDB_val_copy<uint64_t> key(height);
MDB_val result;
auto get_result = mdb_get(*txn_ptr, m_block_coins, &key, &result);
if (get_result == MDB_NOTFOUND)
{
throw0(DB_ERROR(std::string("Attempt to get generated coins from height ").append(boost::lexical_cast<std::string>(height)).append(" failed -- block size not in db").c_str()));
}
else if (get_result)
throw0(DB_ERROR("Error attempting to retrieve a total generated coins from the db"));
if (! m_batch_active)
txn.commit();
return *(const uint64_t*)result.mv_data;
}
crypto::hash BlockchainLMDB::get_block_hash_from_height(const uint64_t& height) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
mdb_txn_safe* txn_ptr = &txn;
if (m_batch_active)
txn_ptr = m_write_txn;
else
{
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
}
MDB_val_copy<uint64_t> key(height);
MDB_val result;
auto get_result = mdb_get(*txn_ptr, m_block_hashes, &key, &result);
if (get_result == MDB_NOTFOUND)
{
throw0(BLOCK_DNE(std::string("Attempt to get hash from height ").append(boost::lexical_cast<std::string>(height)).append(" failed -- hash not in db").c_str()));
}
else if (get_result)
throw0(DB_ERROR(std::string("Error attempting to retrieve a block hash from the db: ").
append(mdb_strerror(get_result)).c_str()));
if (! m_batch_active)
txn.commit();
return *(crypto::hash*)result.mv_data;
}
std::vector<block> BlockchainLMDB::get_blocks_range(const uint64_t& h1, const uint64_t& h2) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
std::vector<block> v;
for (uint64_t height = h1; height <= h2; ++height)
{
v.push_back(get_block_from_height(height));
}
return v;
}
std::vector<crypto::hash> BlockchainLMDB::get_hashes_range(const uint64_t& h1, const uint64_t& h2) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
std::vector<crypto::hash> v;
for (uint64_t height = h1; height <= h2; ++height)
{
v.push_back(get_block_hash_from_height(height));
}
return v;
}
crypto::hash BlockchainLMDB::top_block_hash() const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
if (m_height != 0)
{
return get_block_hash_from_height(m_height - 1);
}
return null_hash;
}
block BlockchainLMDB::get_top_block() const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
if (m_height != 0)
{
return get_block_from_height(m_height - 1);
}
block b;
return b;
}
uint64_t BlockchainLMDB::height() const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
return m_height;
}
bool BlockchainLMDB::tx_exists(const crypto::hash& h) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
mdb_txn_safe* txn_ptr = &txn;
if (m_batch_active)
txn_ptr = m_write_txn;
else
{
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
}
MDB_val_copy<crypto::hash> key(h);
MDB_val result;
TIME_MEASURE_START(time1);
auto get_result = mdb_get(*txn_ptr, m_txs, &key, &result);
TIME_MEASURE_FINISH(time1);
time_tx_exists += time1;
if (get_result == MDB_NOTFOUND)
{
if (! m_batch_active)
txn.commit();
LOG_PRINT_L1("transaction with hash " << epee::string_tools::pod_to_hex(h) << " not found in db");
return false;
}
else if (get_result)
throw0(DB_ERROR("DB error attempting to fetch transaction from hash"));
return true;
}
uint64_t BlockchainLMDB::get_tx_unlock_time(const crypto::hash& h) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
MDB_val_copy<crypto::hash> key(h);
MDB_val result;
auto get_result = mdb_get(txn, m_tx_unlocks, &key, &result);
if (get_result == MDB_NOTFOUND)
throw1(TX_DNE(std::string("tx unlock time with hash ").append(epee::string_tools::pod_to_hex(h)).append(" not found in db").c_str()));
else if (get_result)
throw0(DB_ERROR("DB error attempting to fetch tx unlock time from hash"));
return *(const uint64_t*)result.mv_data;
}
transaction BlockchainLMDB::get_tx(const crypto::hash& h) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
mdb_txn_safe* txn_ptr = &txn;
if (m_batch_active)
txn_ptr = m_write_txn;
else
{
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
}
MDB_val_copy<crypto::hash> key(h);
MDB_val result;
auto get_result = mdb_get(*txn_ptr, m_txs, &key, &result);
if (get_result == MDB_NOTFOUND)
throw1(TX_DNE(std::string("tx with hash ").append(epee::string_tools::pod_to_hex(h)).append(" not found in db").c_str()));
else if (get_result)
throw0(DB_ERROR("DB error attempting to fetch tx from hash"));
blobdata bd;
bd.assign(reinterpret_cast<char*>(result.mv_data), result.mv_size);
transaction tx;
if (!parse_and_validate_tx_from_blob(bd, tx))
throw0(DB_ERROR("Failed to parse tx from blob retrieved from the db"));
if (! m_batch_active)
txn.commit();
return tx;
}
uint64_t BlockchainLMDB::get_tx_count() const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
MDB_stat db_stats;
if (mdb_stat(txn, m_txs, &db_stats))
throw0(DB_ERROR("Failed to query m_txs"));
txn.commit();
return db_stats.ms_entries;
}
std::vector<transaction> BlockchainLMDB::get_tx_list(const std::vector<crypto::hash>& hlist) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
std::vector<transaction> v;
for (auto& h : hlist)
{
v.push_back(get_tx(h));
}
return v;
}
uint64_t BlockchainLMDB::get_tx_block_height(const crypto::hash& h) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
mdb_txn_safe* txn_ptr = &txn;
if (m_batch_active)
txn_ptr = m_write_txn;
else
{
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
}
MDB_val_copy<crypto::hash> key(h);
MDB_val result;
auto get_result = mdb_get(*txn_ptr, m_tx_heights, &key, &result);
if (get_result == MDB_NOTFOUND)
{
throw1(TX_DNE(std::string("tx height with hash ").append(epee::string_tools::pod_to_hex(h)).append(" not found in db").c_str()));
}
else if (get_result)
throw0(DB_ERROR("DB error attempting to fetch tx height from hash"));
if (! m_batch_active)
txn.commit();
return *(const uint64_t*)result.mv_data;
}
uint64_t BlockchainLMDB::get_num_outputs(const uint64_t& amount) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
lmdb_cur cur(txn, m_output_amounts);
MDB_val_copy<uint64_t> k(amount);
MDB_val v;
auto result = mdb_cursor_get(cur, &k, &v, MDB_SET);
if (result == MDB_NOTFOUND)
{
return 0;
}
else if (result)
throw0(DB_ERROR("DB error attempting to get number of outputs of an amount"));
size_t num_elems = 0;
mdb_cursor_count(cur, &num_elems);
txn.commit();
return num_elems;
}
output_data_t BlockchainLMDB::get_output_key(const uint64_t &global_index) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
MDB_val_copy<uint64_t> k(global_index);
MDB_val v;
auto get_result = mdb_get(txn, m_output_keys, &k, &v);
if (get_result == MDB_NOTFOUND)
throw0(DB_ERROR("Attempting to get output pubkey by global index, but key does not exist"));
else if (get_result)
throw0(DB_ERROR("Error attempting to retrieve an output pubkey from the db"));
txn.commit();
return *(output_data_t *) v.mv_data;
}
output_data_t BlockchainLMDB::get_output_key(const uint64_t& amount, const uint64_t& index)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
uint64_t glob_index = get_output_global_index(amount, index);
return get_output_key(glob_index);
}
tx_out BlockchainLMDB::get_output(const crypto::hash& h, const uint64_t& index) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
lmdb_cur cur(txn, m_tx_outputs);
MDB_val_copy<crypto::hash> k(h);
MDB_val v;
auto result = mdb_cursor_get(cur, &k, &v, MDB_SET);
if (result == MDB_NOTFOUND)
throw1(OUTPUT_DNE("Attempting to get an output by tx hash and tx index, but output not found"));
else if (result)
throw0(DB_ERROR("DB error attempting to get an output"));
size_t num_elems = 0;
mdb_cursor_count(cur, &num_elems);
if (num_elems <= index)
throw1(OUTPUT_DNE("Attempting to get an output by tx hash and tx index, but output not found"));
mdb_cursor_get(cur, &k, &v, MDB_FIRST_DUP);
for (uint64_t i = 0; i < index; ++i)
{
mdb_cursor_get(cur, &k, &v, MDB_NEXT_DUP);
}
mdb_cursor_get(cur, &k, &v, MDB_GET_CURRENT);
blobdata b;
b = *(blobdata*)v.mv_data;
cur.close();
txn.commit();
return output_from_blob(b);
}
// As this is not used, its return is now a blank output.
// This will save on space in the db.
tx_out BlockchainLMDB::get_output(const uint64_t& index) const
{
return tx_out();
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
MDB_val_copy<uint64_t> k(index);
MDB_val v;
auto get_result = mdb_get(txn, m_outputs, &k, &v);
if (get_result == MDB_NOTFOUND)
{
throw OUTPUT_DNE("Attempting to get output by global index, but output does not exist");
}
else if (get_result)
throw0(DB_ERROR("Error attempting to retrieve an output from the db"));
blobdata b = *(blobdata*)v.mv_data;
return output_from_blob(b);
}
tx_out_index BlockchainLMDB::get_output_tx_and_index_from_global(const uint64_t& index) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
mdb_txn_safe* txn_ptr = &txn;
if (m_batch_active)
txn_ptr = m_write_txn;
else
{
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
}
MDB_val_copy<uint64_t> k(index);
MDB_val v;
auto get_result = mdb_get(*txn_ptr, m_output_txs, &k, &v);
if (get_result == MDB_NOTFOUND)
throw1(OUTPUT_DNE("output with given index not in db"));
else if (get_result)
throw0(DB_ERROR("DB error attempting to fetch output tx hash"));
crypto::hash tx_hash = *(crypto::hash*)v.mv_data;
get_result = mdb_get(*txn_ptr, m_output_indices, &k, &v);
if (get_result == MDB_NOTFOUND)
throw1(OUTPUT_DNE("output with given index not in db"));
else if (get_result)
throw0(DB_ERROR("DB error attempting to fetch output tx index"));
if (! m_batch_active)
txn.commit();
return tx_out_index(tx_hash, *(const uint64_t *)v.mv_data);
}
tx_out_index BlockchainLMDB::get_output_tx_and_index(const uint64_t& amount, const uint64_t& index)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
std::vector < uint64_t > offsets;
std::vector<tx_out_index> indices;
offsets.push_back(index);
get_output_tx_and_index(amount, offsets, indices);
if (!indices.size())
throw1(OUTPUT_DNE("Attempting to get an output index by amount and amount index, but amount not found"));
return indices[0];
}
std::vector<uint64_t> BlockchainLMDB::get_tx_output_indices(const crypto::hash& h) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
std::vector<uint64_t> index_vec;
mdb_txn_safe txn;
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
lmdb_cur cur(txn, m_tx_outputs);
MDB_val_copy<crypto::hash> k(h);
MDB_val v;
auto result = mdb_cursor_get(cur, &k, &v, MDB_SET);
if (result == MDB_NOTFOUND)
throw1(OUTPUT_DNE("Attempting to get an output by tx hash and tx index, but output not found"));
else if (result)
throw0(DB_ERROR("DB error attempting to get an output"));
size_t num_elems = 0;
mdb_cursor_count(cur, &num_elems);
mdb_cursor_get(cur, &k, &v, MDB_FIRST_DUP);
for (uint64_t i = 0; i < num_elems; ++i)
{
mdb_cursor_get(cur, &k, &v, MDB_GET_CURRENT);
index_vec.push_back(*(const uint64_t *)v.mv_data);
mdb_cursor_get(cur, &k, &v, MDB_NEXT_DUP);
}
cur.close();
txn.commit();
return index_vec;
}
std::vector<uint64_t> BlockchainLMDB::get_tx_amount_output_indices(const crypto::hash& h) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
std::vector<uint64_t> index_vec;
std::vector<uint64_t> index_vec2;
// get the transaction's global output indices first
index_vec = get_tx_output_indices(h);
// these are next used to obtain the amount output indices
transaction tx = get_tx(h);
mdb_txn_safe txn;
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
uint64_t i = 0;
uint64_t global_index;
BOOST_FOREACH(const auto& vout, tx.vout)
{
uint64_t amount = vout.amount;
global_index = index_vec[i];
lmdb_cur cur(txn, m_output_amounts);
MDB_val_copy<uint64_t> k(amount);
MDB_val v;
auto result = mdb_cursor_get(cur, &k, &v, MDB_SET);
if (result == MDB_NOTFOUND)
throw1(OUTPUT_DNE("Attempting to get an output index by amount and amount index, but amount not found"));
else if (result)
throw0(DB_ERROR("DB error attempting to get an output"));
size_t num_elems = 0;
mdb_cursor_count(cur, &num_elems);
mdb_cursor_get(cur, &k, &v, MDB_FIRST_DUP);
uint64_t amount_output_index = 0;
uint64_t output_index = 0;
bool found_index = false;
for (uint64_t j = 0; j < num_elems; ++j)
{
mdb_cursor_get(cur, &k, &v, MDB_GET_CURRENT);
output_index = *(const uint64_t *)v.mv_data;
if (output_index == global_index)
{
amount_output_index = j;
found_index = true;
break;
}
mdb_cursor_get(cur, &k, &v, MDB_NEXT_DUP);
}
if (found_index)
{
index_vec2.push_back(amount_output_index);
}
else
{
// not found
cur.close();
txn.commit();
throw1(OUTPUT_DNE("specified output not found in db"));
}
cur.close();
++i;
}
txn.commit();
return index_vec2;
}
bool BlockchainLMDB::has_key_image(const crypto::key_image& img) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
MDB_val_copy<crypto::key_image> val_key(img);
MDB_val unused;
if (mdb_get(txn, m_spent_keys, &val_key, &unused) == 0)
{
txn.commit();
return true;
}
txn.commit();
return false;
}
// batch_num_blocks: (optional) Used to check if resize needed before batch transaction starts.
void BlockchainLMDB::batch_start(uint64_t batch_num_blocks)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
if (! m_batch_transactions)
throw0(DB_ERROR("batch transactions not enabled"));
if (m_batch_active)
throw0(DB_ERROR("batch transaction already in progress"));
if (m_write_batch_txn != nullptr)
throw0(DB_ERROR("batch transaction already in progress"));
if (m_write_txn)
throw0(DB_ERROR("batch transaction attempted, but m_write_txn already in use"));
check_open();
check_and_resize_for_batch(batch_num_blocks);
m_write_batch_txn = new mdb_txn_safe();
// NOTE: need to make sure it's destroyed properly when done
if (mdb_txn_begin(m_env, NULL, 0, *m_write_batch_txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
// indicates this transaction is for batch transactions, but not whether it's
// active
m_write_batch_txn->m_batch_txn = true;
m_write_txn = m_write_batch_txn;
m_batch_active = true;
LOG_PRINT_L3("batch transaction: begin");
}
void BlockchainLMDB::batch_commit()
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
if (! m_batch_transactions)
throw0(DB_ERROR("batch transactions not enabled"));
if (! m_batch_active)
throw0(DB_ERROR("batch transaction not in progress"));
if (m_write_batch_txn == nullptr)
throw0(DB_ERROR("batch transaction not in progress"));
check_open();
LOG_PRINT_L3("batch transaction: committing...");
TIME_MEASURE_START(time1);
m_write_txn->commit();
TIME_MEASURE_FINISH(time1);
time_commit1 += time1;
LOG_PRINT_L3("batch transaction: committed");
m_write_txn = nullptr;
delete m_write_batch_txn;
}
void BlockchainLMDB::batch_stop()
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
if (! m_batch_transactions)
throw0(DB_ERROR("batch transactions not enabled"));
if (! m_batch_active)
throw0(DB_ERROR("batch transaction not in progress"));
if (m_write_batch_txn == nullptr)
throw0(DB_ERROR("batch transaction not in progress"));
check_open();
LOG_PRINT_L3("batch transaction: committing...");
TIME_MEASURE_START(time1);
m_write_txn->commit();
TIME_MEASURE_FINISH(time1);
time_commit1 += time1;
// for destruction of batch transaction
m_write_txn = nullptr;
delete m_write_batch_txn;
m_write_batch_txn = nullptr;
m_batch_active = false;
LOG_PRINT_L3("batch transaction: end");
}
void BlockchainLMDB::batch_abort()
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
if (! m_batch_transactions)
throw0(DB_ERROR("batch transactions not enabled"));
if (! m_batch_active)
throw0(DB_ERROR("batch transaction not in progress"));
check_open();
// for destruction of batch transaction
m_write_txn = nullptr;
// explicitly call in case mdb_env_close() (BlockchainLMDB::close()) called before BlockchainLMDB destructor called.
m_write_batch_txn->abort();
m_batch_active = false;
m_write_batch_txn = nullptr;
LOG_PRINT_L3("batch transaction: aborted");
}
void BlockchainLMDB::set_batch_transactions(bool batch_transactions)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
m_batch_transactions = batch_transactions;
LOG_PRINT_L3("batch transactions " << (m_batch_transactions ? "enabled" : "disabled"));
}
uint64_t BlockchainLMDB::add_block(const block& blk, const size_t& block_size, const difficulty_type& cumulative_difficulty, const uint64_t& coins_generated,
const std::vector<transaction>& txs)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
if (m_height % 1000 == 0)
{
// for batch mode, DB resize check is done at start of batch transaction
if (! m_batch_active && need_resize())
{
LOG_PRINT_L0("LMDB memory map needs resized, doing that now.");
do_resize();
}
}
mdb_txn_safe txn;
if (! m_batch_active)
{
if (mdb_txn_begin(m_env, NULL, 0, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
m_write_txn = &txn;
}
uint64_t num_outputs = m_num_outputs;
try
{
BlockchainDB::add_block(blk, block_size, cumulative_difficulty, coins_generated, txs);
if (! m_batch_active)
{
m_write_txn = NULL;
TIME_MEASURE_START(time1);
txn.commit();
TIME_MEASURE_FINISH(time1);
time_commit1 += time1;
}
}
catch (...)
{
m_num_outputs = num_outputs;
if (! m_batch_active)
m_write_txn = NULL;
throw;
}
return ++m_height;
}
void BlockchainLMDB::pop_block(block& blk, std::vector<transaction>& txs)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
mdb_txn_safe txn;
if (! m_batch_active)
{
if (mdb_txn_begin(m_env, NULL, 0, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
m_write_txn = &txn;
}
uint64_t num_outputs = m_num_outputs;
try
{
BlockchainDB::pop_block(blk, txs);
if (! m_batch_active)
{
m_write_txn = NULL;
txn.commit();
}
}
catch (...)
{
m_num_outputs = num_outputs;
m_write_txn = NULL;
throw;
}
--m_height;
}
void BlockchainLMDB::get_output_tx_and_index_from_global(const std::vector<uint64_t> &global_indices,
std::vector<tx_out_index> &tx_out_indices) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
tx_out_indices.clear();
mdb_txn_safe txn;
mdb_txn_safe* txn_ptr = &txn;
if (m_batch_active)
txn_ptr = m_write_txn;
else
{
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
}
for (const uint64_t &index : global_indices)
{
MDB_val_copy<uint64_t> k(index);
MDB_val v;
auto get_result = mdb_get(*txn_ptr, m_output_txs, &k, &v);
if (get_result == MDB_NOTFOUND)
throw1(OUTPUT_DNE("output with given index not in db"));
else if (get_result)
throw0(DB_ERROR("DB error attempting to fetch output tx hash"));
crypto::hash tx_hash = *(crypto::hash*) v.mv_data;
get_result = mdb_get(*txn_ptr, m_output_indices, &k, &v);
if (get_result == MDB_NOTFOUND)
throw1(OUTPUT_DNE("output with given index not in db"));
else if (get_result)
throw0(DB_ERROR("DB error attempting to fetch output tx index"));
auto result = tx_out_index(tx_hash, *(const uint64_t *) v.mv_data);
tx_out_indices.push_back(result);
}
if (!m_batch_active)
txn.commit();
}
void BlockchainLMDB::get_output_global_indices(const uint64_t& amount, const std::vector<uint64_t> &offsets,
std::vector<uint64_t> &global_indices)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
TIME_MEASURE_START(txx);
check_open();
global_indices.clear();
uint64_t max = 0;
for (const uint64_t &index : offsets)
{
if (index > max)
max = index;
}
mdb_txn_safe txn;
mdb_txn_safe* txn_ptr = &txn;
if(m_batch_active)
txn_ptr = m_write_txn;
else
{
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
}
lmdb_cur cur(*txn_ptr, m_output_amounts);
MDB_val_copy<uint64_t> k(amount);
MDB_val v;
auto result = mdb_cursor_get(cur, &k, &v, MDB_SET);
if (result == MDB_NOTFOUND)
throw1(OUTPUT_DNE("Attempting to get an output index by amount and amount index, but amount not found"));
else if (result)
throw0(DB_ERROR("DB error attempting to get an output"));
size_t num_elems = 0;
mdb_cursor_count(cur, &num_elems);
if (max <= 1 && num_elems <= max)
throw1(OUTPUT_DNE("Attempting to get an output index by amount and amount index, but output not found"));
uint64_t t_dbmul = 0;
uint64_t t_dbscan = 0;
if (max <= 1)
{
for (const uint64_t& index : offsets)
{
mdb_cursor_get(cur, &k, &v, MDB_FIRST_DUP);
for (uint64_t i = 0; i < index; ++i)
{
mdb_cursor_get(cur, &k, &v, MDB_NEXT_DUP);
}
mdb_cursor_get(cur, &k, &v, MDB_GET_CURRENT);
uint64_t glob_index = *(const uint64_t*) v.mv_data;
LOG_PRINT_L3("Amount: " << amount << " M0->v: " << glob_index);
global_indices.push_back(glob_index);
}
}
else
{
uint32_t curcount = 0;
uint32_t blockstart = 0;
for (const uint64_t& index : offsets)
{
if (index >= num_elems)
{
LOG_PRINT_L1("Index: " << index << " Elems: " << num_elems << " partial results found for get_output_tx_and_index");
break;
}
while (index >= curcount)
{
TIME_MEASURE_START(db1);
if (mdb_cursor_get(cur, &k, &v, curcount == 0 ? MDB_GET_MULTIPLE : MDB_NEXT_MULTIPLE) != 0)
{
// allow partial results
result = false;
break;
}
int count = v.mv_size / sizeof(uint64_t);
blockstart = curcount;
curcount += count;
TIME_MEASURE_FINISH(db1);
t_dbmul += db1;
}
LOG_PRINT_L3("Records returned: " << curcount << " Index: " << index);
TIME_MEASURE_START(db2);
uint64_t actual_index = index - blockstart;
uint64_t glob_index = ((const uint64_t*) v.mv_data)[actual_index];
LOG_PRINT_L3("Amount: " << amount << " M1->v: " << glob_index);
global_indices.push_back(glob_index);
TIME_MEASURE_FINISH(db2);
t_dbscan += db2;
}
}
cur.close();
if(!m_batch_active)
txn.commit();
TIME_MEASURE_FINISH(txx);
LOG_PRINT_L3("txx: " << txx << " db1: " << t_dbmul << " db2: " << t_dbscan);
}
void BlockchainLMDB::get_output_key(const uint64_t &amount, const std::vector<uint64_t> &offsets, std::vector<output_data_t> &outputs)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
TIME_MEASURE_START(db3);
check_open();
outputs.clear();
std::vector <uint64_t> global_indices;
get_output_global_indices(amount, offsets, global_indices);
if (global_indices.size() > 0)
{
mdb_txn_safe txn;
mdb_txn_safe* txn_ptr = &txn;
if (m_batch_active)
txn_ptr = m_write_txn;
else
{
if (mdb_txn_begin(m_env, NULL, MDB_RDONLY, txn))
throw0(DB_ERROR("Failed to create a transaction for the db"));
}
for (const uint64_t &index : global_indices)
{
MDB_val_copy<uint64_t> k(index);
MDB_val v;
auto get_result = mdb_get(*txn_ptr, m_output_keys, &k, &v);
if (get_result != 0)
throw0(DB_ERROR("Attempting to get output pubkey by global index, but key does not exist"));
else if (get_result)
throw0(DB_ERROR("Error attempting to retrieve an output pubkey from the db"));
output_data_t data = *(output_data_t *) v.mv_data;
outputs.push_back(data);
}
if (!m_batch_active)
txn.commit();
}
TIME_MEASURE_FINISH(db3);
LOG_PRINT_L3("db3: " << db3);
}
void BlockchainLMDB::get_output_tx_and_index(const uint64_t& amount, const std::vector<uint64_t> &offsets, std::vector<tx_out_index> &indices)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
indices.clear();
std::vector <uint64_t> global_indices;
get_output_global_indices(amount, offsets, global_indices);
TIME_MEASURE_START(db3);
if(global_indices.size() > 0)
{
get_output_tx_and_index_from_global(global_indices, indices);
}
TIME_MEASURE_FINISH(db3);
LOG_PRINT_L3("db3: " << db3);
}
} // namespace cryptonote
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