wownero/src/blockchain_utilities/bootstrap_file.h

// Copyright (c) 2014-2015, 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.
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// 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.
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// 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.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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#pragma once

#include <boost/iostreams/stream_buffer.hpp>
#include <boost/iostreams/stream.hpp>
#include <boost/iostreams/device/back_inserter.hpp>

#include <boost/iostreams/filtering_streambuf.hpp>

#include "cryptonote_core/cryptonote_basic.h"
#include "cryptonote_core/blockchain_storage.h"
#include "cryptonote_core/blockchain.h"
#include "blockchain_db/blockchain_db.h"
#include "blockchain_db/lmdb/db_lmdb.h"

#include <algorithm>
#include <cstdio>
#include <fstream>
#include <boost/iostreams/copy.hpp>
#include <atomic>

#include "common/command_line.h"
#include "version.h"


// CONFIG: choose one of the three #define's
//
// DB_MEMORY is a sensible default for users migrating to LMDB, as it allows
// the exporter to use the in-memory blockchain while the other binaries
// work with LMDB, without recompiling anything.
//
#define SOURCE_DB DB_MEMORY
// #define SOURCE_DB DB_LMDB
// to use global compile-time setting (DB_MEMORY or DB_LMDB):
// #define SOURCE_DB BLOCKCHAIN_DB


// bounds checking is done before writing to buffer, but buffer size
// should be a sensible maximum
#define BUFFER_SIZE 1000000
#define NUM_BLOCKS_PER_CHUNK 1
#define BLOCKCHAIN_RAW "blockchain.raw"


using namespace cryptonote;


class BootstrapFile
{
public:

  uint64_t count_blocks(const std::string& dir_path);
  uint64_t seek_to_first_chunk(std::ifstream& import_file);

#if SOURCE_DB == DB_MEMORY
  bool store_blockchain_raw(cryptonote::blockchain_storage* cs, cryptonote::tx_memory_pool* txp,
      boost::filesystem::path& output_file, uint64_t use_block_height=0);
#else
  bool store_blockchain_raw(cryptonote::Blockchain* cs, cryptonote::tx_memory_pool* txp,
      boost::filesystem::path& output_file, uint64_t use_block_height=0);
#endif

protected:

#if SOURCE_DB == DB_MEMORY
  blockchain_storage* m_blockchain_storage;
#else
  Blockchain* m_blockchain_storage;
#endif

  tx_memory_pool* m_tx_pool;
  typedef std::vector<char> buffer_type;
  std::ofstream * m_raw_data_file;
  buffer_type m_buffer;
  boost::iostreams::stream<boost::iostreams::back_insert_device<buffer_type>>* m_output_stream;

  // open export file for write
  bool open_writer(const boost::filesystem::path& file_path);
  bool initialize_file();
  bool close();
  void write_block(block& block);
  void flush_chunk();

private:

  uint64_t m_height;
  uint64_t m_cur_height; // tracks current height during export
  uint32_t m_max_chunk;
};