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db_lmdb.cpp
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db_lmdb.cpp
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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 "cryptonote_core/cryptonote_format_utils.h"
#include "crypto/crypto.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;
};
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
{
void BlockchainLMDB::add_block( const block& blk
, const size_t& block_size
, const difficulty_type& cumulative_difficulty
, const uint64_t& coins_generated
)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
MDB_val_copy<crypto::hash> val_h(get_block_hash(blk));
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))
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"));
}
MDB_val_copy<uint64_t> key(m_height);
MDB_val_copy<blobdata> blob(block_to_blob(blk));
if (mdb_put(*m_write_txn, m_blocks, &key, &blob, 0))
throw0(DB_ERROR("Failed to add block blob to db transaction"));
MDB_val_copy<size_t> sz(block_size);
if (mdb_put(*m_write_txn, m_block_sizes, &key, &sz, 0))
throw0(DB_ERROR("Failed to add block size to db transaction"));
MDB_val_copy<uint64_t> ts(blk.timestamp);
if (mdb_put(*m_write_txn, m_block_timestamps, &key, &ts, 0))
throw0(DB_ERROR("Failed to add block timestamp to db transaction"));
MDB_val_copy<difficulty_type> diff(cumulative_difficulty);
if (mdb_put(*m_write_txn, m_block_diffs, &key, &diff, 0))
throw0(DB_ERROR("Failed to add block cumulative difficulty to db transaction"));
MDB_val_copy<uint64_t> coinsgen(coins_generated);
if (mdb_put(*m_write_txn, m_block_coins, &key, &coinsgen, 0))
throw0(DB_ERROR("Failed to add block total generated coins to db transaction"));
if (mdb_put(*m_write_txn, m_block_heights, &val_h, &key, 0))
throw0(DB_ERROR("Failed to add block height by hash to db transaction"));
if (mdb_put(*m_write_txn, m_block_hashes, &key, &val_h, 0))
throw0(DB_ERROR("Failed to add block hash to db transaction"));
}
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)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
MDB_val_copy<crypto::hash> val_h(get_transaction_hash(tx));
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));
if (mdb_put(*m_write_txn, m_txs, &val_h, &blob, 0))
throw0(DB_ERROR("Failed to add tx blob to db transaction"));
MDB_val_copy<uint64_t> height(m_height);
if (mdb_put(*m_write_txn, m_tx_heights, &val_h, &height, 0))
throw0(DB_ERROR("Failed to add tx block height to db transaction"));
MDB_val_copy<uint64_t> unlock_time(tx.unlock_time);
if (mdb_put(*m_write_txn, m_tx_unlocks, &val_h, &unlock_time, 0))
throw0(DB_ERROR("Failed to add tx unlock time to db transaction"));
}
void BlockchainLMDB::remove_transaction_data(const crypto::hash& tx_hash)
{
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);
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)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
MDB_val_copy<uint64_t> k(m_num_outputs);
MDB_val_copy<crypto::hash> v(tx_hash);
if (mdb_put(*m_write_txn, m_output_txs, &k, &v, 0))
throw0(DB_ERROR("Failed to add output tx hash to db transaction"));
if (mdb_put(*m_write_txn, m_tx_outputs, &v, &k, 0))
throw0(DB_ERROR("Failed to add tx output index to db transaction"));
MDB_val_copy<uint64_t> val_local_index(local_index);
if (mdb_put(*m_write_txn, m_output_indices, &k, &val_local_index, 0))
throw0(DB_ERROR("Failed to add tx output index to db transaction"));
MDB_val_copy<uint64_t> val_amount(tx_output.amount);
if (auto result = mdb_put(*m_write_txn, m_output_amounts, &val_amount, &k, 0))
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))
{
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, &val_pubkey, 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)
{
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)
{
remove_output(*(const uint64_t*)v.mv_data);
if (i < num_elems - 1)
{
mdb_cursor_get(cur, &k, &v, MDB_NEXT_DUP);
}
}
}
cur.close();
}
void BlockchainLMDB::remove_output(const tx_out& tx_output)
{
return;
}
void BlockchainLMDB::remove_output(const uint64_t& out_index)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
check_open();
MDB_val k;
MDB_val v;
/****** 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, &v, NULL);
if (result != 0 && result != MDB_NOTFOUND)
throw1(DB_ERROR("Error adding removal of output tx index to db transaction"));
result = mdb_del(*m_write_txn, m_output_txs, &v, NULL);
if (result != 0 && result != MDB_NOTFOUND)
throw1(DB_ERROR("Error adding removal of output tx hash to db transaction"));
result = mdb_del(*m_write_txn, m_output_amounts, &v, NULL);
if (result != 0 && result != MDB_NOTFOUND)
throw1(DB_ERROR("Error adding removal of output amount to db transaction"));
result = mdb_del(*m_write_txn, m_output_keys, &v, NULL);
if (result == MDB_NOTFOUND)
{
LOG_PRINT_L2("Removing output, no public key found.");
}
else if (result)
throw1(DB_ERROR("Error adding removal of output pubkey to db transaction"));
m_num_outputs--;
}
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 (mdb_put(*m_write_txn, m_spent_keys, &val_key, &unused, 0))
throw1(DB_ERROR("Error adding spent key image to db transaction"));
}
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)
{
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) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
return 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__);
}
BlockchainLMDB::BlockchainLMDB()
{
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_height = 0;
}
void BlockchainLMDB::open(const std::string& filename)
{
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()));
}
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 = 1LL << 34;
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()));
if (auto result = mdb_env_open(m_env, filename.c_str(), 0, 0644))
throw0(DB_ERROR(std::string("Failed to open lmdb environment: ").append(mdb_strerror(result)).c_str()));
// get a read/write MDB_txn
txn_safe txn;
if (mdb_txn_begin(m_env, NULL, 0, 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_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_outputs");
mdb_set_dupsort(txn, m_output_amounts, compare_uint64);
mdb_set_dupsort(txn, m_tx_outputs, compare_uint64);
// 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;
// commit the transaction
txn.commit();
m_open = true;
// from here, init should be finished
}
// unused for now, create will happen on open if doesn't exist
void BlockchainLMDB::create(const std::string& filename)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
throw DB_CREATE_FAILURE("create() is not implemented for this BlockchainDB, open() will create files if needed.");
}
void BlockchainLMDB::close()
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
// FIXME: not yet thread safe!!! Use with care.
mdb_env_close(m_env);
}
void BlockchainLMDB::sync()
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
// LMDB documentation leads me to believe this is unnecessary
}
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;
}
// 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();
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_L1("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();
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();
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();
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_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"));
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();
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_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"));
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__);
check_open();
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_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"));
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();
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_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"));
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();
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_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("Error attempting to retrieve a block hash from the db"));
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();
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_txs, &key, &result);
if (get_result == MDB_NOTFOUND)
{
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();
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__);