Add blockchain_export utility

Based on work by tomerkon.
See https://github.com/tomerkon/bitmonero
  src/cryptonote_core/bootfilesaver.{h,cpp}
  src/bootfilegen/bootfilegen.cpp

3 files changed, 470 insertions, 0 deletions

diff --git a/src/blockchain_converter/CMakeLists.txt b/src/blockchain_converter/CMakeLists.txt
index cc400d927..e0f3be901 100644
--- a/src/blockchain_converter/CMakeLists.txt
+++ b/src/blockchain_converter/CMakeLists.txt
@@ -47,6 +47,20 @@ set(blockchain_import_private_headers
 bitmonero_private_headers(blockchain_import
 	  ${blockchain_import_private_headers})
 
+set(blockchain_export_sources
+  blockchain_export.cpp
+  )
+
+set(blockchain_export_private_headers
+  import.h
+  blockchain_export.h
+  )
+
+bitmonero_private_headers(blockchain_export
+	  ${blockchain_export_private_headers})
+
+
+
 if (BLOCKCHAIN_DB STREQUAL DB_LMDB)
 bitmonero_add_executable(blockchain_converter
   ${blockchain_converter_sources}
@@ -79,3 +93,18 @@ add_dependencies(blockchain_import
 set_property(TARGET blockchain_import
 	PROPERTY
 	OUTPUT_NAME "blockchain_import")
+
+bitmonero_add_executable(blockchain_export
+  ${blockchain_export_sources}
+  ${blockchain_export_private_headers})
+
+target_link_libraries(blockchain_export
+  LINK_PRIVATE
+    cryptonote_core
+    ${CMAKE_THREAD_LIBS_INIT})
+
+add_dependencies(blockchain_export
+	version)
+set_property(TARGET blockchain_export
+	PROPERTY
+	OUTPUT_NAME "blockchain_export")
diff --git a/src/blockchain_converter/blockchain_export.cpp b/src/blockchain_converter/blockchain_export.cpp
new file mode 100644
index 000000000..33944dba6
--- /dev/null
+++ b/src/blockchain_converter/blockchain_export.cpp
@@ -0,0 +1,367 @@
+// 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.
+//
+// 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 <algorithm>
+#include <cstdio>
+#include <fstream>
+#include <boost/iostreams/copy.hpp>
+#include <atomic>
+
+#include <boost/archive/binary_oarchive.hpp>
+#include <boost/archive/binary_iarchive.hpp>
+#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 <boost/iostreams/filter/bzip2.hpp>
+#include "common/command_line.h"
+#include "version.h"
+#include "blockchain_export.h"
+#include "cryptonote_core/cryptonote_boost_serialization.h"
+
+#include "import.h"
+// #include "fake_core.h"
+
+#define SOURCE_DB DB_MEMORY
+// currently not supported:
+// to use what was set at compile time (DB_MEMORY or DB_LMDB)
+// #define SOURCE_DB BLOCKCHAIN_DB
+
+static int max_chunk = 0;
+static size_t height;
+
+namespace po = boost::program_options;
+
+using namespace cryptonote;
+using namespace epee;
+
+bool BlockchainExport::open(const boost::filesystem::path& dir_path)
+{
+  if (boost::filesystem::exists(dir_path))
+  {
+    if (!boost::filesystem::is_directory(dir_path))
+    {
+      LOG_PRINT_RED_L0("export directory path is a file: " << dir_path);
+      return false;
+    }
+  }
+  else
+  {
+    if (!boost::filesystem::create_directory(dir_path))
+    {
+      LOG_PRINT_RED_L0("Failed to create directory " << dir_path);
+      return false;
+    }
+  }
+
+  std::string file_path = (dir_path / BLOCKCHAIN_RAW).string();
+  m_raw_data_file = new std::ofstream();
+  m_raw_data_file->open(file_path , std::ios_base::binary | std::ios_base::out| std::ios::trunc);
+  if (m_raw_data_file->fail())
+    return false;
+
+  m_output_stream = new boost::iostreams::stream<boost::iostreams::back_insert_device<buffer_type>>(m_buffer);
+  m_raw_archive = new boost::archive::binary_oarchive(*m_output_stream);
+  if (m_raw_archive == NULL)
+    return false;
+
+  return true;
+}
+
+void BlockchainExport::flush_chunk()
+{
+  m_output_stream->flush();
+  char buffer[STR_LENGTH_OF_INT + 1];
+  int chunk_size = (int) m_buffer.size();
+  if (chunk_size > BUFFER_SIZE)
+  {
+    LOG_PRINT_L0("WARNING: chunk_size " << chunk_size << " > BUFFER_SIZE " << BUFFER_SIZE);
+  }
+  sprintf(buffer, STR_FORMAT_OF_INT, chunk_size);
+  m_raw_data_file->write(buffer, STR_LENGTH_OF_INT);
+  if (max_chunk < chunk_size)
+  {
+    max_chunk = chunk_size;
+  }
+  long pos_before = m_raw_data_file->tellp();
+  std::copy(m_buffer.begin(), m_buffer.end(), std::ostreambuf_iterator<char>(*m_raw_data_file));
+  m_raw_data_file->flush();
+  long pos_after = m_raw_data_file->tellp();
+  long num_chars_written = pos_after - pos_before;
+  if ((int) num_chars_written != chunk_size)
+  {
+    LOG_PRINT_RED_L0("INTERNAL ERROR: num chars wrote NEQ buffer size. height = " << height);
+  }
+
+  m_buffer.clear();
+  delete m_raw_archive;
+  delete m_output_stream;
+  m_output_stream = new boost::iostreams::stream<boost::iostreams::back_insert_device<buffer_type>>(m_buffer);
+  m_raw_archive = new boost::archive::binary_oarchive(*m_output_stream);
+}
+
+void BlockchainExport::serialize_block_to_text_buffer(const block& block)
+{
+  *m_raw_archive << block;
+}
+
+void BlockchainExport::buffer_serialize_tx(const transaction& tx)
+{
+  *m_raw_archive << tx;
+}
+
+void BlockchainExport::buffer_write_num_txs(const std::list<transaction> txs)
+{
+  int n = txs.size();
+  *m_raw_archive << n;
+}
+
+void BlockchainExport::write_block(block& block)
+{
+  serialize_block_to_text_buffer(block);
+  std::list<transaction> txs;
+
+  uint64_t block_height = boost::get<txin_gen>(block.miner_tx.vin.front()).height;
+
+  // put coinbase transaction first
+  transaction coinbase_tx = block.miner_tx;
+  crypto::hash coinbase_tx_hash = get_transaction_hash(coinbase_tx);
+  // blockchain_storage:
+  const transaction* cb_tx_full = m_blockchain_storage->get_tx(coinbase_tx_hash);
+  //
+  // BlockchainDB:
+  // transaction cb_tx_full = m_blockchain_storage->get_tx(coinbase_tx_hash);
+
+
+  // blockchain_storage:
+  if (cb_tx_full != NULL)
+  {
+    txs.push_back(*cb_tx_full);
+  }
+  //
+  // BlockchainDB:
+  // txs.push_back(cb_tx_full);
+
+  // now add all regular transactions
+  BOOST_FOREACH(const auto& tx_id, block.tx_hashes)
+  {
+#if SOURCE_DB == DB_MEMORY
+    const transaction* tx = m_blockchain_storage->get_tx(tx_id);
+#else
+    transaction tx = m_blockchain_storage->get_tx(tx_id);
+#endif
+
+#if SOURCE_DB == DB_MEMORY
+    if(tx == NULL)
+    {
+      if (! m_tx_pool)
+        throw std::runtime_error("Aborting: tx == NULL, so memory pool required to get tx, but memory pool isn't enabled");
+      else
+      {
+        transaction tx;
+        if(m_tx_pool->get_transaction(tx_id, tx))
+          txs.push_back(tx);
+        else
+          throw std::runtime_error("Aborting: tx not found in pool");
+      }
+    }
+    else
+      txs.push_back(*tx);
+#else
+    txs.push_back(tx);
+#endif
+  }
+
+  // serialize all txs to the persistant storage
+  buffer_write_num_txs(txs);
+  BOOST_FOREACH(const auto& tx, txs)
+  {
+    buffer_serialize_tx(tx);
+  }
+
+  // These three attributes are currently necessary for a fast import that adds blocks without verification.
+  bool include_extra_block_data = true;
+  if (include_extra_block_data)
+  {
+    size_t block_size = m_blockchain_storage->get_block_size(block_height);
+    difficulty_type cumulative_difficulty = m_blockchain_storage->get_block_cumulative_difficulty(block_height);
+    uint64_t coins_generated = m_blockchain_storage->get_block_coins_generated(block_height);
+
+    *m_raw_archive << block_size;
+    *m_raw_archive << cumulative_difficulty;
+    *m_raw_archive << coins_generated;
+  }
+}
+
+bool BlockchainExport::BlockchainExport::close()
+{
+  if (m_raw_data_file->fail())
+    return false;
+
+  m_raw_data_file->flush();
+  delete m_raw_archive;
+  delete m_output_stream;
+  delete m_raw_data_file;
+  return true;
+}
+
+
+#if SOURCE_DB == DB_MEMORY
+bool BlockchainExport::store_blockchain_raw(blockchain_storage* _blockchain_storage, tx_memory_pool* _tx_pool, boost::filesystem::path& output_dir, uint64_t use_block_height)
+#else
+bool BlockchainExport::store_blockchain_raw(BlockchainDB* _blockchain_storage, tx_memory_pool* _tx_pool, boost::filesystem::path& output_dir, uint64_t use_block_height)
+#endif
+{
+  uint64_t use_block_height2 = 0;
+  m_blockchain_storage = _blockchain_storage;
+  m_tx_pool = _tx_pool;
+  LOG_PRINT_L0("Storing blocks raw data...");
+  if (!BlockchainExport::open(output_dir))
+  {
+    LOG_PRINT_RED_L0("failed to open raw file for write");
+    return false;
+  }
+  block b;
+  LOG_PRINT_L0("source blockchain height: " <<  m_blockchain_storage->get_current_blockchain_height());
+  LOG_PRINT_L0("requested block height: " << use_block_height);
+  if ((use_block_height > 0) && (use_block_height < m_blockchain_storage->get_current_blockchain_height()))
+    use_block_height2 = use_block_height;
+  else
+  {
+    use_block_height2 = m_blockchain_storage->get_current_blockchain_height();
+    LOG_PRINT_L0("using block height: " << use_block_height2);
+  }
+  for (height=0; height < use_block_height2; ++height)
+  {
+    crypto::hash hash = m_blockchain_storage->get_block_id_by_height(height);
+    m_blockchain_storage->get_block_by_hash(hash, b);
+    write_block(b);
+    if (height % NUM_BLOCKS_PER_CHUNK == 0) {
+      flush_chunk();
+    }
+  }
+  if (height % NUM_BLOCKS_PER_CHUNK != 0)
+  {
+    flush_chunk();
+  }
+
+  LOG_PRINT_L0("longest chunk was " << max_chunk << " bytes");
+  return BlockchainExport::close();
+}
+
+
+int main(int argc, char* argv[])
+{
+  uint32_t log_level = 0;
+  uint64_t block_height = 0;
+  std::string import_filename = BLOCKCHAIN_RAW;
+
+  boost::filesystem::path default_data_path {tools::get_default_data_dir()};
+  boost::filesystem::path default_testnet_data_path {default_data_path / "testnet"};
+
+  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<uint32_t> arg_log_level   =  {"log-level",  "", log_level};
+  const command_line::arg_descriptor<uint64_t> arg_block_height =  {"block-number", "", block_height};
+  const command_line::arg_descriptor<bool>     arg_testnet_on  = {
+    "testnet"
+      , "Run on testnet."
+      , false
+  };
+
+
+  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_log_level);
+  command_line::add_arg(desc_cmd_sett, arg_block_height);
+  command_line::add_arg(desc_cmd_sett, arg_testnet_on);
+
+  command_line::add_arg(desc_cmd_only, command_line::arg_help);
+
+  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;
+
+  if (command_line::get_arg(vm, command_line::arg_help))
+  {
+    std::cout << CRYPTONOTE_NAME << " v" << MONERO_VERSION_FULL << ENDL << ENDL;
+    std::cout << desc_options << std::endl;
+    return 1;
+  }
+
+  log_level    = command_line::get_arg(vm, arg_log_level);
+  block_height = command_line::get_arg(vm, arg_block_height);
+
+  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);
+
+  bool opt_testnet = command_line::get_arg(vm, arg_testnet_on);
+
+  std::string m_config_folder;
+
+  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);
+  boost::filesystem::path output_dir {m_config_folder};
+  output_dir /= "export";
+  std::cout << "config directory: " << m_config_folder << ENDL;
+
+  // If we wanted to use the memory pool, we would set up a fake_core.
+
+#if SOURCE_DB == DB_MEMORY
+  // blockchain_storage* core_storage = NULL;
+  // tx_memory_pool m_mempool(*core_storage); // is this fake anyway? just passing in NULL! so m_mempool can't be used anyway, right?
+  // core_storage = new blockchain_storage(&m_mempool);
+
+  blockchain_storage* core_storage = new blockchain_storage(NULL);
+#else
+  BlockchainDB* core_storage = new BlockchainLMDB();
+#endif
+  // tx_memory_pool m_mempool(core_storage);
+
+  LOG_PRINT_L0("Initializing source blockchain storage...");
+  r = core_storage->init(m_config_folder, opt_testnet);
+  CHECK_AND_ASSERT_MES(r, false, "Failed to initialize source blockchain storage");
+  LOG_PRINT_L0("Source blockchain storage initialized OK");
+  LOG_PRINT_L0("Exporting blockchain raw data...");
+
+  BlockchainExport be;
+  r = be.store_blockchain_raw(core_storage, NULL, output_dir, block_height);
+  CHECK_AND_ASSERT_MES(r, false, "Failed to export blockchain raw data");
+  LOG_PRINT_L0("Blockchain raw data exported OK");
+}
diff --git a/src/blockchain_converter/blockchain_export.h b/src/blockchain_converter/blockchain_export.h
new file mode 100644
index 000000000..cd79d1c47
--- /dev/null
+++ b/src/blockchain_converter/blockchain_export.h
@@ -0,0 +1,74 @@
+// 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.
+//
+// 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.
+
+#pragma once
+
+#include <boost/archive/binary_oarchive.hpp>
+#include <boost/iostreams/stream_buffer.hpp>
+#include <boost/iostreams/stream.hpp>
+#include <boost/iostreams/device/back_inserter.hpp>
+#include "cryptonote_core/cryptonote_basic.h"
+#include "cryptonote_core/blockchain_storage.h"
+#include "cryptonote_core/blockchain.h"
+// TODO:
+#include "blockchain_db/blockchain_db.h"
+#include "blockchain_db/lmdb/db_lmdb.h"
+
+using namespace cryptonote;
+
+class BlockchainExport
+{
+public:
+  bool store_blockchain_raw(cryptonote::blockchain_storage* cs, cryptonote::tx_memory_pool* txp, 
+      boost::filesystem::path& output_dir, uint64_t use_block_height=0);
+  //
+  // BlockchainDB:
+  // bool store_blockchain_raw(cryptonote::BlockchainDB* cs, boost::filesystem::path& output_dir, uint64_t use_block_height=0);
+
+protected:
+  // blockchain_storage:
+  blockchain_storage* m_blockchain_storage;
+  //
+  // BlockchainDB:
+  // BlockchainDB* m_blockchain_storage;
+  tx_memory_pool* m_tx_pool;
+  typedef std::vector<char> buffer_type;
+  std::ofstream * m_raw_data_file;
+  boost::archive::binary_oarchive * m_raw_archive;
+  buffer_type m_buffer;
+  boost::iostreams::stream<boost::iostreams::back_insert_device<buffer_type>>* m_output_stream;
+
+  // open export file for write
+  bool open(const boost::filesystem::path& dir_path);
+  bool close();
+  void write_block(block& block);
+  void serialize_block_to_text_buffer(const block& block);
+  void buffer_serialize_tx(const transaction& tx);
+  void buffer_write_num_txs(const std::list<transaction> txs);
+  void flush_chunk();
+};