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danicoin/src/blockchain_utilities/blockchain_import.cpp
Riccardo Spagni 5c71f5d13e
update version
2015-12-31 23:12:13 +02:00

780 lines
25 KiB
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// Copyright (c) 2014-2016, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <atomic>
#include <cstdio>
#include <algorithm>
#include <fstream>
#include <boost/filesystem.hpp>
#include "bootstrap_file.h"
#include "bootstrap_serialization.h"
#include "cryptonote_core/cryptonote_format_utils.h"
#include "serialization/binary_utils.h" // dump_binary(), parse_binary()
#include "serialization/json_utils.h" // dump_json()
#include "include_base_utils.h"
#include <lmdb.h> // for db flag arguments
#include "fake_core.h"
unsigned int epee::g_test_dbg_lock_sleep = 0;
namespace
{
// CONFIG
bool opt_batch = true;
bool opt_verify = true; // use add_new_block, which does verification before calling add_block
bool opt_resume = true;
bool opt_testnet = true;
// number of blocks per batch transaction
// adjustable through command-line argument according to available RAM
#if !defined(WIN32)
uint64_t db_batch_size = 20000;
#else
// set a lower default batch size, pending possible LMDB issue with large transaction size
uint64_t db_batch_size = 1000;
#endif
// when verifying, use a smaller default batch size so progress is more
// frequently saved
uint64_t db_batch_size_verify = 5000;
std::string refresh_string = "\r \r";
}
namespace po = boost::program_options;
using namespace cryptonote;
using namespace epee;
int parse_db_arguments(const std::string& db_arg_str, std::string& db_engine, int& mdb_flags)
{
std::vector<std::string> db_args;
boost::split(db_args, db_arg_str, boost::is_any_of("#"));
db_engine = db_args.front();
boost::algorithm::trim(db_engine);
if (db_args.size() == 1)
{
return 0;
}
else if (db_args.size() > 2)
{
std::cerr << "unrecognized database argument format: " << db_arg_str << ENDL;
return 1;
}
std::string db_arg_str2 = db_args[1];
boost::split(db_args, db_arg_str2, boost::is_any_of(","));
for (auto& it : db_args)
{
boost::algorithm::trim(it);
if (it.empty())
continue;
LOG_PRINT_L1("LMDB flag: " << it);
if (it == "nosync")
mdb_flags |= MDB_NOSYNC;
else if (it == "nometasync")
mdb_flags |= MDB_NOMETASYNC;
else if (it == "writemap")
mdb_flags |= MDB_WRITEMAP;
else if (it == "mapasync")
mdb_flags |= MDB_MAPASYNC;
else if (it == "nordahead")
mdb_flags |= MDB_NORDAHEAD;
else
{
std::cerr << "unrecognized database flag: " << it << ENDL;
return 1;
}
}
return 0;
}
template <typename FakeCore>
int pop_blocks(FakeCore& simple_core, int num_blocks)
{
bool use_batch = false;
if (opt_batch)
{
if (simple_core.support_batch)
use_batch = true;
else
LOG_PRINT_L0("WARNING: batch transactions enabled but unsupported or unnecessary for this database engine - ignoring");
}
if (use_batch)
simple_core.batch_start();
int quit = 0;
block popped_block;
std::vector<transaction> popped_txs;
for (int i=0; i < num_blocks; ++i)
{
#if defined(BLOCKCHAIN_DB) && (BLOCKCHAIN_DB == DB_MEMORY)
simple_core.m_storage.debug_pop_block_from_blockchain();
#else
// simple_core.m_storage.pop_block_from_blockchain() is private, so call directly through db
simple_core.m_storage.get_db().pop_block(popped_block, popped_txs);
#endif
quit = 1;
}
if (use_batch)
{
if (quit > 1)
{
// There was an error, so don't commit pending data.
// Destructor will abort write txn.
}
else
{
simple_core.batch_stop();
}
#if !defined(BLOCKCHAIN_DB) || (BLOCKCHAIN_DB == DB_LMDB)
simple_core.m_storage.get_db().show_stats();
#endif
}
return num_blocks;
}
template <typename FakeCore>
int import_from_file(FakeCore& simple_core, const std::string& import_file_path, uint64_t block_stop=0)
{
#if !defined(BLOCKCHAIN_DB)
static_assert(std::is_same<fake_core_memory, FakeCore>::value || std::is_same<fake_core_lmdb, FakeCore>::value,
"FakeCore constraint error");
#endif
#if !defined(BLOCKCHAIN_DB) || (BLOCKCHAIN_DB == DB_LMDB)
if (std::is_same<fake_core_lmdb, FakeCore>::value)
{
// Reset stats, in case we're using newly created db, accumulating stats
// from addition of genesis block.
// This aligns internal db counts with importer counts.
simple_core.m_storage.get_db().reset_stats();
}
#endif
boost::filesystem::path fs_import_file_path(import_file_path);
boost::system::error_code ec;
if (!boost::filesystem::exists(fs_import_file_path, ec))
{
LOG_PRINT_L0("bootstrap file not found: " << fs_import_file_path);
return false;
}
BootstrapFile bootstrap;
// BootstrapFile bootstrap(import_file_path);
uint64_t total_source_blocks = bootstrap.count_blocks(import_file_path);
LOG_PRINT_L0("bootstrap file last block number: " << total_source_blocks-1 << " (zero-based height) total blocks: " << total_source_blocks);
std::cout << ENDL;
std::cout << "Preparing to read blocks..." << ENDL;
std::cout << ENDL;
std::ifstream import_file;
import_file.open(import_file_path, std::ios_base::binary | std::ifstream::in);
uint64_t h = 0;
uint64_t num_imported = 0;
if (import_file.fail())
{
LOG_PRINT_L0("import_file.open() fail");
return false;
}
// 4 byte magic + (currently) 1024 byte header structures
bootstrap.seek_to_first_chunk(import_file);
std::string str1;
char buffer1[1024];
char buffer_block[BUFFER_SIZE];
block b;
transaction tx;
int quit = 0;
uint64_t bytes_read = 0;
uint64_t start_height = 1;
if (opt_resume)
start_height = simple_core.m_storage.get_current_blockchain_height();
// Note that a new blockchain will start with block number 0 (total blocks: 1)
// due to genesis block being added at initialization.
if (! block_stop)
{
block_stop = total_source_blocks - 1;
}
// These are what we'll try to use, and they don't have to be a determination
// from source and destination blockchains, but those are the defaults.
LOG_PRINT_L0("start block: " << start_height << " stop block: " <<
block_stop);
bool use_batch = false;
if (opt_batch)
{
if (simple_core.support_batch)
use_batch = true;
else
LOG_PRINT_L0("WARNING: batch transactions enabled but unsupported or unnecessary for this database engine - ignoring");
}
if (use_batch)
simple_core.batch_start(db_batch_size);
LOG_PRINT_L0("Reading blockchain from bootstrap file...");
std::cout << ENDL;
// Within the loop, we skip to start_height before we start adding.
// TODO: Not a bottleneck, but we can use what's done in count_blocks() and
// only do the chunk size reads, skipping the chunk content reads until we're
// at start_height.
while (! quit)
{
uint32_t chunk_size;
import_file.read(buffer1, sizeof(chunk_size));
// TODO: bootstrap.read_chunk();
if (! import_file) {
std::cout << refresh_string;
LOG_PRINT_L0("End of file reached");
quit = 1;
break;
}
bytes_read += sizeof(chunk_size);
str1.assign(buffer1, sizeof(chunk_size));
if (! ::serialization::parse_binary(str1, chunk_size))
{
throw std::runtime_error("Error in deserialization of chunk size");
}
LOG_PRINT_L3("chunk_size: " << chunk_size);
if (chunk_size > BUFFER_SIZE)
{
LOG_PRINT_L0("WARNING: chunk_size " << chunk_size << " > BUFFER_SIZE " << BUFFER_SIZE);
throw std::runtime_error("Aborting: chunk size exceeds buffer size");
}
if (chunk_size > 100000)
{
LOG_PRINT_L0("NOTE: chunk_size " << chunk_size << " > 100000");
}
else if (chunk_size == 0) {
LOG_PRINT_L0("ERROR: chunk_size == 0");
return 2;
}
import_file.read(buffer_block, chunk_size);
if (! import_file) {
LOG_PRINT_L0("ERROR: unexpected end of file: bytes read before error: "
<< import_file.gcount() << " of chunk_size " << chunk_size);
return 2;
}
bytes_read += chunk_size;
LOG_PRINT_L3("Total bytes read: " << bytes_read);
if (h + NUM_BLOCKS_PER_CHUNK < start_height + 1)
{
h += NUM_BLOCKS_PER_CHUNK;
continue;
}
if (h > block_stop)
{
std::cout << refresh_string << "block " << h-1
<< " / " << block_stop
<< std::flush;
std::cout << ENDL << ENDL;
LOG_PRINT_L0("Specified block number reached - stopping. block: " << h-1 << " total blocks: " << h);
quit = 1;
break;
}
try
{
str1.assign(buffer_block, chunk_size);
bootstrap::block_package bp;
if (! ::serialization::parse_binary(str1, bp))
throw std::runtime_error("Error in deserialization of chunk");
int display_interval = 1000;
int progress_interval = 10;
// NOTE: use of NUM_BLOCKS_PER_CHUNK is a placeholder in case multi-block chunks are later supported.
for (int chunk_ind = 0; chunk_ind < NUM_BLOCKS_PER_CHUNK; ++chunk_ind)
{
++h;
if ((h-1) % display_interval == 0)
{
std::cout << refresh_string;
LOG_PRINT_L0("loading block number " << h-1);
}
else
{
LOG_PRINT_L3("loading block number " << h-1);
}
b = bp.block;
LOG_PRINT_L2("block prev_id: " << b.prev_id << ENDL);
if ((h-1) % progress_interval == 0)
{
std::cout << refresh_string << "block " << h-1
<< " / " << block_stop
<< std::flush;
}
std::vector<transaction> txs;
std::vector<transaction> archived_txs;
archived_txs = bp.txs;
// std::cout << refresh_string;
// LOG_PRINT_L1("txs: " << archived_txs.size());
// if archived_txs is invalid
// {
// std::cout << refresh_string;
// LOG_PRINT_RED_L0("exception while de-archiving txs, height=" << h);
// quit = 1;
// break;
// }
// tx number 1: coinbase tx
// tx number 2 onwards: archived_txs
unsigned int tx_num = 1;
for (const transaction& tx : archived_txs)
{
++tx_num;
// if tx is invalid
// {
// LOG_PRINT_RED_L0("exception while indexing tx from txs, height=" << h <<", tx_num=" << tx_num);
// quit = 1;
// break;
// }
// std::cout << refresh_string;
// LOG_PRINT_L1("tx hash: " << get_transaction_hash(tx));
// crypto::hash hsh = null_hash;
// size_t blob_size = 0;
// NOTE: all tx hashes except for coinbase tx are available in the block data
// get_transaction_hash(tx, hsh, blob_size);
// LOG_PRINT_L0("tx " << tx_num << " " << hsh << " : " << ENDL);
// LOG_PRINT_L0(obj_to_json_str(tx) << ENDL);
// add blocks with verification.
// for Blockchain and blockchain_storage add_new_block().
if (opt_verify)
{
// crypto::hash hsh = null_hash;
// size_t blob_size = 0;
// get_transaction_hash(tx, hsh, blob_size);
tx_verification_context tvc = AUTO_VAL_INIT(tvc);
bool r = true;
r = simple_core.m_pool.add_tx(tx, tvc, true, true);
if (!r)
{
LOG_PRINT_RED_L0("failed to add transaction to transaction pool, height=" << h <<", tx_num=" << tx_num);
quit = 1;
break;
}
}
else
{
// for add_block() method, without (much) processing.
// don't add coinbase transaction to txs.
//
// because add_block() calls
// add_transaction(blk_hash, blk.miner_tx) first, and
// then a for loop for the transactions in txs.
txs.push_back(tx);
}
}
if (opt_verify)
{
block_verification_context bvc = boost::value_initialized<block_verification_context>();
simple_core.m_storage.add_new_block(b, bvc);
if (bvc.m_verifivation_failed)
{
LOG_PRINT_L0("Failed to add block to blockchain, verification failed, height = " << h);
LOG_PRINT_L0("skipping rest of file");
// ok to commit previously batched data because it failed only in
// verification of potential new block with nothing added to batch
// yet
quit = 1;
break;
}
if (! bvc.m_added_to_main_chain)
{
LOG_PRINT_L0("Failed to add block to blockchain, height = " << h);
LOG_PRINT_L0("skipping rest of file");
// make sure we don't commit partial block data
quit = 2;
break;
}
}
else
{
size_t block_size;
difficulty_type cumulative_difficulty;
uint64_t coins_generated;
block_size = bp.block_size;
cumulative_difficulty = bp.cumulative_difficulty;
coins_generated = bp.coins_generated;
// std::cout << refresh_string;
// LOG_PRINT_L2("block_size: " << block_size);
// LOG_PRINT_L2("cumulative_difficulty: " << cumulative_difficulty);
// LOG_PRINT_L2("coins_generated: " << coins_generated);
try
{
simple_core.add_block(b, block_size, cumulative_difficulty, coins_generated, txs);
}
catch (const std::exception& e)
{
std::cout << refresh_string;
LOG_PRINT_RED_L0("Error adding block to blockchain: " << e.what());
quit = 2; // make sure we don't commit partial block data
break;
}
}
++num_imported;
if (use_batch)
{
if ((h-1) % db_batch_size == 0)
{
std::cout << refresh_string;
// zero-based height
std::cout << ENDL << "[- batch commit at height " << h-1 << " -]" << ENDL;
simple_core.batch_stop();
simple_core.batch_start(db_batch_size);
std::cout << ENDL;
#if !defined(BLOCKCHAIN_DB) || (BLOCKCHAIN_DB == DB_LMDB)
simple_core.m_storage.get_db().show_stats();
#endif
}
}
}
}
catch (const std::exception& e)
{
std::cout << refresh_string;
LOG_PRINT_RED_L0("exception while reading from file, height=" << h);
return 2;
}
} // while
import_file.close();
if (use_batch)
{
if (quit > 1)
{
// There was an error, so don't commit pending data.
// Destructor will abort write txn.
}
else
{
simple_core.batch_stop();
}
#if !defined(BLOCKCHAIN_DB) || (BLOCKCHAIN_DB == DB_LMDB)
simple_core.m_storage.get_db().show_stats();
#endif
LOG_PRINT_L0("Number of blocks imported: " << num_imported);
if (h > 0)
// TODO: if there was an error, the last added block is probably at zero-based height h-2
LOG_PRINT_L0("Finished at block: " << h-1 << " total blocks: " << h);
}
std::cout << ENDL;
return 0;
}
int main(int argc, char* argv[])
{
#if defined(BLOCKCHAIN_DB) && (BLOCKCHAIN_DB == DB_MEMORY)
std::string default_db_engine = "memory";
#else
std::string default_db_engine = "lmdb";
#endif
uint32_t log_level = LOG_LEVEL_0;
uint64_t num_blocks = 0;
uint64_t block_stop = 0;
std::string m_config_folder;
std::string db_arg_str;
tools::sanitize_locale();
boost::filesystem::path default_data_path {tools::get_default_data_dir()};
boost::filesystem::path default_testnet_data_path {default_data_path / "testnet"};
std::string import_file_path;
po::options_description desc_cmd_only("Command line options");
po::options_description desc_cmd_sett("Command line options and settings options");
const command_line::arg_descriptor<std::string> arg_input_file = {"input-file", "Specify input file", "", true};
const command_line::arg_descriptor<uint32_t> arg_log_level = {"log-level", "", log_level};
const command_line::arg_descriptor<uint64_t> arg_block_stop = {"block-stop", "Stop at block number", block_stop};
const command_line::arg_descriptor<uint64_t> arg_batch_size = {"batch-size", "", db_batch_size};
const command_line::arg_descriptor<uint64_t> arg_pop_blocks = {"pop-blocks", "Remove blocks from end of blockchain", num_blocks};
const command_line::arg_descriptor<bool> arg_testnet_on = {
"testnet"
, "Run on testnet."
, false
};
const command_line::arg_descriptor<bool> arg_count_blocks = {
"count-blocks"
, "Count blocks in bootstrap file and exit"
, false
};
const command_line::arg_descriptor<std::string> arg_database = {
"database", "available: memory, lmdb"
, default_db_engine
};
const command_line::arg_descriptor<bool> arg_verify = {"verify",
"Verify blocks and transactions during import", true};
const command_line::arg_descriptor<bool> arg_batch = {"batch",
"Batch transactions for faster import", true};
const command_line::arg_descriptor<bool> arg_resume = {"resume",
"Resume from current height if output database already exists", true};
command_line::add_arg(desc_cmd_sett, command_line::arg_data_dir, default_data_path.string());
command_line::add_arg(desc_cmd_sett, command_line::arg_testnet_data_dir, default_testnet_data_path.string());
command_line::add_arg(desc_cmd_sett, arg_input_file);
command_line::add_arg(desc_cmd_sett, arg_testnet_on);
command_line::add_arg(desc_cmd_sett, arg_log_level);
command_line::add_arg(desc_cmd_sett, arg_database);
command_line::add_arg(desc_cmd_sett, arg_batch_size);
command_line::add_arg(desc_cmd_sett, arg_block_stop);
command_line::add_arg(desc_cmd_only, arg_count_blocks);
command_line::add_arg(desc_cmd_only, arg_pop_blocks);
command_line::add_arg(desc_cmd_only, command_line::arg_help);
// call add_options() directly for these arguments since
// command_line helpers support only boolean switch, not boolean argument
desc_cmd_sett.add_options()
(arg_verify.name, make_semantic(arg_verify), arg_verify.description)
(arg_batch.name, make_semantic(arg_batch), arg_batch.description)
(arg_resume.name, make_semantic(arg_resume), arg_resume.description)
;
po::options_description desc_options("Allowed options");
desc_options.add(desc_cmd_only).add(desc_cmd_sett);
po::variables_map vm;
bool r = command_line::handle_error_helper(desc_options, [&]()
{
po::store(po::parse_command_line(argc, argv, desc_options), vm);
po::notify(vm);
return true;
});
if (! r)
return 1;
log_level = command_line::get_arg(vm, arg_log_level);
opt_verify = command_line::get_arg(vm, arg_verify);
opt_batch = command_line::get_arg(vm, arg_batch);
opt_resume = command_line::get_arg(vm, arg_resume);
block_stop = command_line::get_arg(vm, arg_block_stop);
db_batch_size = command_line::get_arg(vm, arg_batch_size);
if (command_line::get_arg(vm, command_line::arg_help))
{
std::cout << "Monero '" << MONERO_RELEASE_NAME << "' (v" << MONERO_VERSION_FULL << ")" << ENDL << ENDL;
std::cout << desc_options << std::endl;
return 1;
}
if (! opt_batch && ! vm["batch-size"].defaulted())
{
std::cerr << "Error: batch-size set, but batch option not enabled" << ENDL;
return 1;
}
if (! db_batch_size)
{
std::cerr << "Error: batch-size must be > 0" << ENDL;
return 1;
}
if (opt_verify && vm["batch-size"].defaulted())
{
// usually want batch size default lower if verify on, so progress can be
// frequently saved.
//
// currently, with Windows, default batch size is low, so ignore
// default db_batch_size_verify unless it's even lower
if (db_batch_size > db_batch_size_verify)
{
db_batch_size = db_batch_size_verify;
}
}
std::vector<std::string> db_engines {"memory", "lmdb"};
opt_testnet = command_line::get_arg(vm, arg_testnet_on);
auto data_dir_arg = opt_testnet ? command_line::arg_testnet_data_dir : command_line::arg_data_dir;
m_config_folder = command_line::get_arg(vm, data_dir_arg);
db_arg_str = command_line::get_arg(vm, arg_database);
log_space::get_set_log_detalisation_level(true, log_level);
log_space::log_singletone::add_logger(LOGGER_CONSOLE, NULL, NULL);
LOG_PRINT_L0("Starting...");
LOG_PRINT_L0("Setting log level = " << log_level);
boost::filesystem::path fs_import_file_path;
if (command_line::has_arg(vm, arg_input_file))
fs_import_file_path = boost::filesystem::path(command_line::get_arg(vm, arg_input_file));
else
fs_import_file_path = boost::filesystem::path(m_config_folder) / "export" / BLOCKCHAIN_RAW;
import_file_path = fs_import_file_path.string();
if (command_line::has_arg(vm, arg_count_blocks))
{
BootstrapFile bootstrap;
bootstrap.count_blocks(import_file_path);
return 0;
}
std::string db_engine;
int mdb_flags = 0;
int res = 0;
res = parse_db_arguments(db_arg_str, db_engine, mdb_flags);
if (res)
{
std::cerr << "Error parsing database argument(s)" << ENDL;
return 1;
}
if (std::find(db_engines.begin(), db_engines.end(), db_engine) == db_engines.end())
{
std::cerr << "Invalid database engine: " << db_engine << std::endl;
return 1;
}
LOG_PRINT_L0("database: " << db_engine);
LOG_PRINT_L0("verify: " << std::boolalpha << opt_verify << std::noboolalpha);
if (opt_batch)
{
LOG_PRINT_L0("batch: " << std::boolalpha << opt_batch << std::noboolalpha
<< " batch size: " << db_batch_size);
}
else
{
LOG_PRINT_L0("batch: " << std::boolalpha << opt_batch << std::noboolalpha);
}
LOG_PRINT_L0("resume: " << std::boolalpha << opt_resume << std::noboolalpha);
LOG_PRINT_L0("testnet: " << std::boolalpha << opt_testnet << std::noboolalpha);
LOG_PRINT_L0("bootstrap file path: " << import_file_path);
LOG_PRINT_L0("database path: " << m_config_folder);
try
{
// fake_core needed for verification to work when enabled.
//
// NOTE: don't need fake_core method of doing things when we're going to call
// BlockchainDB add_block() directly and have available the 3 block
// properties to do so. Both ways work, but fake core isn't necessary in that
// circumstance.
// for multi_db_runtime:
#if !defined(BLOCKCHAIN_DB)
if (db_engine == "lmdb")
{
fake_core_lmdb simple_core(m_config_folder, opt_testnet, opt_batch, mdb_flags);
import_from_file(simple_core, import_file_path, block_stop);
}
else if (db_engine == "memory")
{
fake_core_memory simple_core(m_config_folder, opt_testnet);
import_from_file(simple_core, import_file_path, block_stop);
}
else
{
std::cerr << "database engine unrecognized" << ENDL;
return 1;
}
// for multi_db_compile:
#else
if (db_engine != default_db_engine)
{
std::cerr << "Invalid database engine for compiled version: " << db_engine << std::endl;
return 1;
}
#if BLOCKCHAIN_DB == DB_LMDB
fake_core_lmdb simple_core(m_config_folder, opt_testnet, opt_batch, mdb_flags);
#else
fake_core_memory simple_core(m_config_folder, opt_testnet);
#endif
if (! vm["pop-blocks"].defaulted())
{
num_blocks = command_line::get_arg(vm, arg_pop_blocks);
LOG_PRINT_L0("height: " << simple_core.m_storage.get_current_blockchain_height());
pop_blocks(simple_core, num_blocks);
LOG_PRINT_L0("height: " << simple_core.m_storage.get_current_blockchain_height());
return 0;
}
import_from_file(simple_core, import_file_path, block_stop);
#endif
}
catch (const DB_ERROR& e)
{
std::cout << std::string("Error loading blockchain db: ") + e.what() + " -- shutting down now" << ENDL;
return 1;
}
// destructors called at exit:
//
// ensure db closed
// - transactions properly checked and handled
// - disk sync if needed
//
// fake_core object's destructor is called when it goes out of scope. For an
// LMDB fake_core, it calls Blockchain::deinit() on its object, which in turn
// calls delete on its BlockchainDB derived class' object, which closes its
// files.
return 0;
}
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