text: // Copyright (c) 2017-2018, The Masari Project
  // Copyright (c) 2014-2018, 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 <boost/algorithm/string.hpp>
  #include "misc_log_ex.h"
  #include "bootstrap_file.h"
  #include "bootstrap_serialization.h"
  #include "cryptonote_basic/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 "blockchain_db/db_types.h"
  #include "cryptonote_core/cryptonote_core.h"
  
  #undef MONERO_DEFAULT_LOG_CATEGORY
  #define MONERO_DEFAULT_LOG_CATEGORY "bcutil"
  
  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;
  bool opt_stagenet = true;
  
  // number of blocks per batch transaction
  // adjustable through command-line argument according to available RAM
  #if ARCH_WIDTH != 32
  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 = 100;
  #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;
  
  // db_mode: safe, fast, fastest
  int get_db_flags_from_mode(const std::string& db_mode)
  {
    int db_flags = 0;
    if (db_mode == "safe")
      db_flags = DBF_SAFE;
    else if (db_mode == "fast")
      db_flags = DBF_FAST;
    else if (db_mode == "fastest")
      db_flags = DBF_FASTEST;
    return db_flags;
  }
  
  int parse_db_arguments(const std::string& db_arg_str, std::string& db_type, int& db_flags)
  {
    std::vector<std::string> db_args;
    boost::split(db_args, db_arg_str, boost::is_any_of("#"));
    db_type = db_args.front();
    boost::algorithm::trim(db_type);
  
    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(","));
  
    // optionally use a composite mode instead of individual flags
    const std::unordered_set<std::string> db_modes {"safe", "fast", "fastest"};
    std::string db_mode;
    if (db_args.size() == 1)
    {
      if (db_modes.count(db_args[0]) > 0)
      {
        db_mode = db_args[0];
      }
    }
    if (! db_mode.empty())
    {
      db_flags = get_db_flags_from_mode(db_mode);
    }
    return 0;
  }
  
  
  int pop_blocks(cryptonote::core& core, int num_blocks)
  {
    bool use_batch = opt_batch;
  
    if (use_batch)
      core.get_blockchain_storage().get_db().batch_start();
  
    int quit = 0;
    block popped_block;
    std::vector<transaction> popped_txs;
    for (int i=0; i < num_blocks; ++i)
    {
      // simple_core.m_storage.pop_block_from_blockchain() is private, so call directly through db
      core.get_blockchain_storage().get_db().pop_block(popped_block, popped_txs);
      quit = 1;
    }
  
  
    if (use_batch)
    {
      if (quit > 1)
      {
        // There was an error, so don't commit pending data.
        // Destructor will abort write txn.
      }
      else
      {
        core.get_blockchain_storage().get_db().batch_stop();
      }
      core.get_blockchain_storage().get_db().show_stats();
    }
  
    return num_blocks;
  }
  
  int check_flush(cryptonote::core &core, std::list<block_complete_entry> &blocks, bool force)
  {
    if (blocks.empty())
      return 0;
    if (!force && blocks.size() < db_batch_size)
      return 0;
  
    // wait till we can verify a full HOH without extra, for speed
    uint64_t new_height = core.get_blockchain_storage().get_db().height() + blocks.size();
    if (!force && new_height % HASH_OF_HASHES_STEP)
      return 0;
  
    std::list<crypto::hash> hashes;
    for (const auto &b: blocks)
    {
      cryptonote::block block;
      if (!parse_and_validate_block_from_blob(b.block, block))
      {
        MERROR("Failed to parse block: "
            << epee::string_tools::pod_to_hex(get_blob_hash(b.block)));
        core.cleanup_handle_incoming_blocks();
        return 1;
      }
      hashes.push_back(cryptonote::get_block_hash(block));
    }
    core.prevalidate_block_hashes(core.get_blockchain_storage().get_db().height(), hashes);
  
    core.prepare_handle_incoming_blocks(blocks);
  
    for(const block_complete_entry& block_entry: blocks)
    {
      // process transactions
      for(auto& tx_blob: block_entry.txs)
      {
        tx_verification_context tvc = AUTO_VAL_INIT(tvc);
        core.handle_incoming_tx(tx_blob, tvc, true, true, false);
        if(tvc.m_verifivation_failed)
        {
          MERROR("transaction verification failed, tx_id = "
              << epee::string_tools::pod_to_hex(get_blob_hash(tx_blob)));
          core.cleanup_handle_incoming_blocks();
          return 1;
        }
      }
  
      // process block
  
      block_verification_context bvc = boost::value_initialized<block_verification_context>();
  
      core.handle_incoming_block(block_entry.block, bvc, false); // <--- process block
  
      if(bvc.m_verifivation_failed)
      {
        MERROR("Block verification failed, id = "
            << epee::string_tools::pod_to_hex(get_blob_hash(block_entry.block)));
        core.cleanup_handle_incoming_blocks();
        return 1;
      }
      if(bvc.m_marked_as_orphaned)
      {
        MERROR("Block received at sync phase was marked as orphaned");
        core.cleanup_handle_incoming_blocks();
        return 1;
      }
  
    } // each download block
    if (!core.cleanup_handle_incoming_blocks())
      return 1;
  
    blocks.clear();
    return 0;
  }
  
  int import_from_file(cryptonote::core& core, const std::string& import_file_path, uint64_t block_stop=0)
  {
    // 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.
    core.get_blockchain_storage().get_db().reset_stats();
  
    boost::filesystem::path fs_import_file_path(import_file_path);
    boost::system::error_code ec;
    if (!boost::filesystem::exists(fs_import_file_path, ec))
    {
      MFATAL("bootstrap file not found: " << fs_import_file_path);
      return false;
    }
  
    uint64_t start_height = 1, seek_height;
    if (opt_resume)
      start_height = core.get_blockchain_storage().get_current_blockchain_height();
  
    seek_height = start_height;
    BootstrapFile bootstrap;
    std::streampos pos;
    // BootstrapFile bootstrap(import_file_path);
    uint64_t total_source_blocks = bootstrap.count_blocks(import_file_path, pos, seek_height);
    MINFO("bootstrap file last block number: " << total_source_blocks-1 << " (zero-based height)  total blocks: " << total_source_blocks);
  
    if (total_source_blocks-1 <= start_height)
    {
      return false;
    }
  
    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())
    {
      MFATAL("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;
  
    // 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.
    MINFO("start block: " << start_height << "  stop block: " <<
        block_stop);
  
    bool use_batch = opt_batch && !opt_verify;
  
    MINFO("Reading blockchain from bootstrap file...");
    std::cout << ENDL;
  
    std::list<block_complete_entry> blocks;
  
    // Skip to start_height before we start adding.
    {
      bool q2 = false;
      import_file.seekg(pos);
      bytes_read = bootstrap.count_bytes(import_file, start_height-seek_height, h, q2);
      if (q2)
      {
        quit = 2;
        goto quitting;
      }
      h = start_height;
    }
  
    if (use_batch)
    {
      uint64_t bytes, h2;
      bool q2;
      pos = import_file.tellg();
      bytes = bootstrap.count_bytes(import_file, db_batch_size, h2, q2);
      if (import_file.eof())
        import_file.clear();
      import_file.seekg(pos);
      core.get_blockchain_storage().get_db().batch_start(db_batch_size, bytes);
    }
    while (! quit)
    {
      uint32_t chunk_size;
      import_file.read(buffer1, sizeof(chunk_size));
      // TODO: bootstrap.read_chunk();
      if (! import_file) {
        std::cout << refresh_string;
        MINFO("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");
      }
      MDEBUG("chunk_size: " << chunk_size);
  
      if (chunk_size > BUFFER_SIZE)
      {
        MWARNING("WARNING: chunk_size " << chunk_size << " > BUFFER_SIZE " << BUFFER_SIZE);
        throw std::runtime_error("Aborting: chunk size exceeds buffer size");
      }
      if (chunk_size > CHUNK_SIZE_WARNING_THRESHOLD)
      {
        MINFO("NOTE: chunk_size " << chunk_size << " > " << CHUNK_SIZE_WARNING_THRESHOLD);
      }
      else if (chunk_size == 0) {
        MFATAL("ERROR: chunk_size == 0");
        return 2;
      }
      import_file.read(buffer_block, chunk_size);
      if (! import_file) {
        if (import_file.eof())
        {
          std::cout << refresh_string;
          MINFO("End of file reached - file was truncated");
          quit = 1;
          break;
        }
        else
        {
          MFATAL("ERROR: unexpected end of file: bytes read before error: "
              << import_file.gcount() << " of chunk_size " << chunk_size);
          return 2;
        }
      }
      bytes_read += chunk_size;
      MDEBUG("Total bytes read: " << bytes_read);
  
      if (h > block_stop)
      {
        std::cout << refresh_string << "block " << h-1
          << " / " << block_stop
          << std::flush;
        std::cout << ENDL << ENDL;
        MINFO("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;
            MDEBUG("loading block number " << h-1);
          }
          else
          {
            MDEBUG("loading block number " << h-1);
          }
          b = bp.block;
          MDEBUG("block prev_id: " << b.prev_id << ENDL);
  
          if ((h-1) % progress_interval == 0)
          {
            std::cout << refresh_string << "block " << h-1
              << " / " << block_stop
              << std::flush;
          }
  
          if (opt_verify)
          {
            cryptonote::blobdata block;
            cryptonote::block_to_blob(bp.block, block);
            std::list<cryptonote::blobdata> txs;
            for (const auto &tx: bp.txs)
            {
              txs.push_back(cryptonote::blobdata());
              cryptonote::tx_to_blob(tx, txs.back());
            }
            blocks.push_back({block, txs});
            int ret = check_flush(core, blocks, false);
            if (ret)
            {
              quit = 2; // make sure we don't commit partial block data
              break;
            }
          }
          else
          {
            std::vector<transaction> txs;
            std::vector<transaction> archived_txs;
  
            archived_txs = bp.txs;
  
            // tx number 1: coinbase tx
            // tx number 2 onwards: archived_txs
            for (const transaction &tx : archived_txs)
            {
              // add blocks with verification.
              // for Blockchain and blockchain_storage add_new_block().
              // 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);
            }
  
            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;
  
            try
            {
              core.get_blockchain_storage().get_db().add_block(b, block_size, cumulative_difficulty, coins_generated, txs);
            }
            catch (const std::exception& e)
            {
              std::cout << refresh_string;
              MFATAL("Error adding block to blockchain: " << e.what());
              quit = 2; // make sure we don't commit partial block data
              break;
            }
  
            if (use_batch)
            {
              if ((h-1) % db_batch_size == 0)
              {
                uint64_t bytes, h2;
                bool q2;
                std::cout << refresh_string;
                // zero-based height
                std::cout << ENDL << "[- batch commit at height " << h-1 << " -]" << ENDL;
                core.get_blockchain_storage().get_db().batch_stop();
                pos = import_file.tellg();
                bytes = bootstrap.count_bytes(import_file, db_batch_size, h2, q2);
                import_file.seekg(pos);
                core.get_blockchain_storage().get_db().batch_start(db_batch_size, bytes);
                std::cout << ENDL;
                core.get_blockchain_storage().get_db().show_stats();
              }
            }
          }
          ++num_imported;
        }
      }
      catch (const std::exception& e)
      {
        std::cout << refresh_string;
        MFATAL("exception while reading from file, height=" << h << ": " << e.what());
        return 2;
      }
    } // while
  
  quitting:
    import_file.close();
  
    if (opt_verify)
    {
      int ret = check_flush(core, blocks, true);
      if (ret)
        return ret;
    }
  
    if (use_batch)
    {
      if (quit > 1)
      {
        // There was an error, so don't commit pending data.
        // Destructor will abort write txn.
      }
      else
      {
        core.get_blockchain_storage().get_db().batch_stop();
      }
    }
  
    core.get_blockchain_storage().get_db().show_stats();
    MINFO("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
      MINFO("Finished at block: " << h-1 << "  total blocks: " << h);
  
    std::cout << ENDL;
    return 0;
  }
  
  int main(int argc, char* argv[])
  {
    TRY_ENTRY();
  
    epee::string_tools::set_module_name_and_folder(argv[0]);
  
    std::string default_db_type = "lmdb";
  
    std::string available_dbs = cryptonote::blockchain_db_types(", ");
    available_dbs = "available: " + available_dbs;
  
    uint32_t log_level = 0;
    uint64_t num_blocks = 0;
    uint64_t block_stop = 0;
    std::string m_config_folder;
    std::string db_arg_str;
  
    tools::on_startup();
  
    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<std::string> arg_log_level   = {"log-level",  "0-4 or categories", ""};
    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_drop_hf  = {"drop-hard-fork", "Drop hard fork subdbs", 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_dbs.c_str(), default_db_type
    };
    const command_line::arg_descriptor<bool> arg_verify =  {"guard-against-pwnage",
      "Verify blocks and transactions during import (only disable if you exported the file yourself)", 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, arg_input_file);
    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, arg_drop_hf);
    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);
    cryptonote::core::init_options(desc_options);
  
    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;
  
    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 << "Lotto '" << MONERO_RELEASE_NAME << "' (v" << MONERO_VERSION_FULL << ")" << ENDL << ENDL;
      std::cout << desc_options << std::endl;
      return 1;
    }
  
    if (! opt_batch && !command_line::is_arg_defaulted(vm, arg_batch_size))
    {
      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 && command_line::is_arg_defaulted(vm, arg_batch_size))
    {
      // 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;
      }
    }
  
    opt_testnet = command_line::get_arg(vm, cryptonote::arg_testnet_on);
    opt_stagenet = command_line::get_arg(vm, cryptonote::arg_stagenet_on);
    if (opt_testnet && opt_stagenet)
    {
      std::cerr << "Error: Can't specify more than one of --testnet and --stagenet" << ENDL;
      return 1;
    }
    m_config_folder = command_line::get_arg(vm, cryptonote::arg_data_dir);
    db_arg_str = command_line::get_arg(vm, arg_database);
  
    mlog_configure(mlog_get_default_log_path("monero-blockchain-import.log"), true);
    if (!command_line::is_arg_defaulted(vm, arg_log_level))
      mlog_set_log(command_line::get_arg(vm, arg_log_level).c_str());
    else
      mlog_set_log(std::string(std::to_string(log_level) + ",bcutil:INFO").c_str());
  
    MINFO("Starting...");
  
    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_type;
    int db_flags = 0;
    int res = 0;
    res = parse_db_arguments(db_arg_str, db_type, db_flags);
    if (res)
    {
      std::cerr << "Error parsing database argument(s)" << ENDL;
      return 1;
    }
  
    if (!cryptonote::blockchain_valid_db_type(db_type))
    {
      std::cerr << "Invalid database type: " << db_type << std::endl;
      return 1;
    }
  
    MINFO("database: " << db_type);
    MINFO("database flags: " << db_flags);
    MINFO("verify:  " << std::boolalpha << opt_verify << std::noboolalpha);
    if (opt_batch)
    {
      MINFO("batch:   " << std::boolalpha << opt_batch << std::noboolalpha
          << "  batch size: " << db_batch_size);
    }
    else
    {
      MINFO("batch:   " << std::boolalpha << opt_batch << std::noboolalpha);
    }
    MINFO("resume:  " << std::boolalpha << opt_resume  << std::noboolalpha);
    MINFO("nettype: " << (opt_testnet ? "testnet" : opt_stagenet ? "stagenet" : "mainnet"));
  
    MINFO("bootstrap file path: " << import_file_path);
    MINFO("database path:       " << m_config_folder);
  
    cryptonote::cryptonote_protocol_stub pr; //TODO: stub only for this kind of test, make real validation of relayed objects
    cryptonote::core core(&pr);
  
    try
    {
  
    core.disable_dns_checkpoints(true);
    if (!core.init(vm, NULL))
    {
      std::cerr << "Failed to initialize core" << ENDL;
      return 1;
    }
    core.get_blockchain_storage().get_db().set_batch_transactions(true);
  
    if (!command_line::is_arg_defaulted(vm, arg_pop_blocks))
    {
      num_blocks = command_line::get_arg(vm, arg_pop_blocks);
      MINFO("height: " << core.get_blockchain_storage().get_current_blockchain_height());
      pop_blocks(core, num_blocks);
      MINFO("height: " << core.get_blockchain_storage().get_current_blockchain_height());
      return 0;
    }
  
    if (!command_line::is_arg_defaulted(vm, arg_drop_hf))
    {
      MINFO("Dropping hard fork tables...");
      core.get_blockchain_storage().get_db().drop_hard_fork_info();
      core.deinit();
      return 0;
    }
  
    import_from_file(core, import_file_path, block_stop);
  
    // ensure db closed
    //   - transactions properly checked and handled
    //   - disk sync if needed
    //
    core.deinit();
    }
    catch (const DB_ERROR& e)
    {
      std::cout << std::string("Error loading blockchain db: ") + e.what() + " -- shutting down now" << ENDL;
      core.deinit();
      return 1;
    }
  
    return 0;
  
    CATCH_ENTRY("Import error", 1);
  }
  