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oxen-core/src/blockchain_utilities/bootstrap_file.cpp

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// Copyright (c) 2014-2019, The Monero Project
// Copyright (c) 2018, The Loki 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 "bootstrap_serialization.h"
#include "serialization/binary_utils.h" // dump_binary(), parse_binary()
#include "bootstrap_file.h"
#include "common/fs-format.h"
using namespace cryptonote;
namespace
{
// This number was picked by taking the leading 4 bytes from this output:
// echo Oxen bootstrap file | sha1sum
const uint32_t blockchain_raw_magic = 0x28721586;
const uint32_t header_size = 1024;
std::string refresh_string = "\r \r";
auto logcat = log::Cat("bcutil");
}
bool BootstrapFile::open_writer(const fs::path& file_path)
{
const auto dir_path = file_path.parent_path();
if (!dir_path.empty())
{
if (fs::exists(dir_path))
{
if (!fs::is_directory(dir_path))
{
log::error(logcat, "export directory path is a file: {}", dir_path);
return false;
}
}
else
{
if (!fs::create_directory(dir_path))
{
log::error(logcat, "Failed to create directory {}", dir_path);
return false;
}
}
}
m_raw_data_file = new std::ofstream();
bool do_initialize_file = false;
uint64_t num_blocks = 0;
if (! fs::exists(file_path))
{
log::debug(logcat, "creating file");
do_initialize_file = true;
num_blocks = 0;
}
else
{
num_blocks = count_blocks(file_path.string());
log::debug(logcat, "appending to existing file with height: {} total blocks: {}", num_blocks-1, num_blocks);
}
m_height = num_blocks;
if (do_initialize_file)
m_raw_data_file->open(file_path.string(), std::ios_base::binary | std::ios_base::out | std::ios::trunc);
else
m_raw_data_file->open(file_path.string(), std::ios_base::binary | std::ios_base::out | std::ios::app | std::ios::ate);
if (m_raw_data_file->fail())
return false;
m_output_stream = new boost::iostreams::stream<boost::iostreams::back_insert_device<buffer_type>>(m_buffer);
if (m_output_stream == nullptr)
return false;
if (do_initialize_file)
initialize_file();
return true;
}
bool BootstrapFile::initialize_file()
{
const uint32_t file_magic = blockchain_raw_magic;
std::string blob;
try {
blob = serialization::dump_binary(file_magic);
} catch (const std::exception& e) {
throw std::runtime_error("Error in serialization of file magic: "s + e.what());
}
*m_raw_data_file << blob;
bootstrap::file_info bfi;
bfi.major_version = 0;
bfi.minor_version = 1;
bfi.header_size = header_size;
bootstrap::blocks_info bbi;
bbi.block_first = 0;
bbi.block_last = 0;
bbi.block_last_pos = 0;
buffer_type buffer2;
boost::iostreams::stream<boost::iostreams::back_insert_device<buffer_type>> output_stream_header(buffer2);
uint32_t bd_size = 0;
std::string bd = t_serializable_object_to_blob(bfi);
log::debug(logcat, "bootstrap::file_info size: {}", bd.size());
bd_size = bd.size();
try {
blob = serialization::dump_binary(bd_size);
} catch (const std::exception& e) {
throw std::runtime_error("Error in serialization of bootstrap::file_info size: "s + e.what());
}
output_stream_header << blob;
output_stream_header << bd;
bd = t_serializable_object_to_blob(bbi);
log::debug(logcat, "bootstrap::blocks_info size: {}", bd.size());
bd_size = bd.size();
try {
blob = serialization::dump_binary(bd_size);
} catch (const std::exception& e) {
throw std::runtime_error("Error in serialization of bootstrap::blocks_info size: "s + e.what());
}
output_stream_header << blob;
output_stream_header << bd;
output_stream_header.flush();
output_stream_header << std::string(header_size-buffer2.size(), 0); // fill in rest with null bytes
output_stream_header.flush();
std::copy(buffer2.begin(), buffer2.end(), std::ostreambuf_iterator<char>(*m_raw_data_file));
return true;
}
void BootstrapFile::flush_chunk()
{
m_output_stream->flush();
uint32_t chunk_size = m_buffer.size();
// log::trace(logcat, "chunk_size {}", chunk_size);
if (chunk_size > BUFFER_SIZE)
{
log::warning(logcat, "WARNING: chunk_size {} > BUFFER_SIZE {}", chunk_size, BUFFER_SIZE);
}
std::string blob;
try {
blob = serialization::dump_binary(chunk_size);
} catch (const std::exception& e) {
throw std::runtime_error("Error in serialization of chunk size: "s + e.what());
}
*m_raw_data_file << blob;
if (m_max_chunk < chunk_size)
{
m_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 (static_cast<unsigned long>(num_chars_written) != chunk_size)
{
log::error(logcat, "Error writing chunk: height: {} chunk_size: {} num chars written: {}", m_cur_height, chunk_size, num_chars_written);
throw std::runtime_error("Error writing chunk");
}
m_buffer.clear();
delete m_output_stream;
m_output_stream = new boost::iostreams::stream<boost::iostreams::back_insert_device<buffer_type>>(m_buffer);
log::debug(logcat, "flushed chunk: chunk_size: {}", chunk_size);
}
void BootstrapFile::write_block(block& block)
{
bootstrap::block_package bp;
bp.block = block;
std::vector<transaction> txs;
uint64_t block_height = var::get<txin_gen>(block.miner_tx.vin.front()).height;
// now add all regular transactions
for (const auto& tx_id : block.tx_hashes)
{
if (!tx_id)
{
throw std::runtime_error("Aborting: null txid");
}
transaction tx = m_blockchain_storage->get_db().get_tx(tx_id);
txs.push_back(tx);
}
// these non-coinbase txs will be serialized using this structure
bp.txs = txs;
// 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_weight = m_blockchain_storage->get_db().get_block_weight(block_height);
difficulty_type cumulative_difficulty = m_blockchain_storage->get_db().get_block_cumulative_difficulty(block_height);
uint64_t coins_generated = m_blockchain_storage->get_db().get_block_already_generated_coins(block_height);
bp.block_weight = block_weight;
bp.cumulative_difficulty = cumulative_difficulty;
bp.coins_generated = coins_generated;
}
std::string bd = t_serializable_object_to_blob(bp);
m_output_stream->write((const char*)bd.data(), bd.size());
}
bool BootstrapFile::close()
{
if (m_raw_data_file->fail())
return false;
m_raw_data_file->flush();
delete m_output_stream;
delete m_raw_data_file;
return true;
}
bool BootstrapFile::store_blockchain_raw(Blockchain* _blockchain_storage, tx_memory_pool* _tx_pool, fs::path& output_file, uint64_t requested_block_stop)
{
uint64_t num_blocks_written = 0;
m_max_chunk = 0;
m_blockchain_storage = _blockchain_storage;
m_tx_pool = _tx_pool;
uint64_t progress_interval = 100;
log::info(logcat, "Storing blocks raw data...");
if (!BootstrapFile::open_writer(output_file))
{
log::error(logcat, "failed to open raw file for write");
return false;
}
block b;
// block_start, block_stop use 0-based height. m_height uses 1-based height. So to resume export
// from last exported block, block_start doesn't need to add 1 here, as it's already at the next
// height.
uint64_t block_start = m_height;
uint64_t block_stop = 0;
log::info(logcat, "source blockchain height: {}", m_blockchain_storage->get_current_blockchain_height()-1);
if ((requested_block_stop > 0) && (requested_block_stop < m_blockchain_storage->get_current_blockchain_height()))
{
log::info(logcat, "Using requested block height: {}", requested_block_stop);
block_stop = requested_block_stop;
}
else
{
block_stop = m_blockchain_storage->get_current_blockchain_height() - 1;
log::info(logcat, "Using block height of source blockchain: {}", block_stop);
}
for (m_cur_height = block_start; m_cur_height <= block_stop; ++m_cur_height)
{
// this method's height refers to 0-based height (genesis block = height 0)
crypto::hash hash = m_blockchain_storage->get_block_id_by_height(m_cur_height);
m_blockchain_storage->get_block_by_hash(hash, b);
write_block(b);
if (m_cur_height % NUM_BLOCKS_PER_CHUNK == 0) {
flush_chunk();
num_blocks_written += NUM_BLOCKS_PER_CHUNK;
}
if (m_cur_height % progress_interval == 0) {
std::cout << refresh_string;
std::cout << "block " << m_cur_height << "/" << block_stop << "\r" << std::flush;
}
}
// NOTE: use of NUM_BLOCKS_PER_CHUNK is a placeholder in case multi-block chunks are later supported.
if (m_cur_height % NUM_BLOCKS_PER_CHUNK != 0)
{
flush_chunk();
}
// print message for last block, which may not have been printed yet due to progress_interval
std::cout << refresh_string;
std::cout << "block " << m_cur_height-1 << "/" << block_stop << "\n";
log::info(logcat, "Number of blocks exported: {}", num_blocks_written);
if (num_blocks_written > 0)
log::info(logcat, "Largest chunk: {} bytes", m_max_chunk);
return BootstrapFile::close();
}
uint64_t BootstrapFile::seek_to_first_chunk(fs::ifstream& import_file)
{
uint32_t file_magic;
std::string str1;
char buf1[2048];
import_file.read(buf1, sizeof(file_magic));
if (! import_file)
throw std::runtime_error("Error reading expected number of bytes");
str1.assign(buf1, sizeof(file_magic));
try {
serialization::parse_binary(str1, file_magic);
} catch (const std::exception& e) {
throw std::runtime_error("Error in deserialization of file_magic: "s + e.what());
}
if (file_magic != blockchain_raw_magic)
{
log::error(logcat, "bootstrap file not recognized");
throw std::runtime_error("Aborting");
}
else
log::info(logcat, "bootstrap file recognized");
uint32_t buflen_file_info;
import_file.read(buf1, sizeof(buflen_file_info));
str1.assign(buf1, sizeof(buflen_file_info));
if (! import_file)
throw std::runtime_error("Error reading expected number of bytes");
try {
serialization::parse_binary(str1, buflen_file_info);
} catch (const std::exception& e) {
throw std::runtime_error("Error in deserialization of buflen_file_info: "s + e.what());
}
log::info(logcat, "bootstrap::file_info size: {}", buflen_file_info);
if (buflen_file_info > sizeof(buf1))
throw std::runtime_error("Error: bootstrap::file_info size exceeds buffer size");
import_file.read(buf1, buflen_file_info);
if (! import_file)
throw std::runtime_error("Error reading expected number of bytes");
str1.assign(buf1, buflen_file_info);
bootstrap::file_info bfi;
try {
serialization::parse_binary(str1, bfi);
} catch (const std::exception& e) {
throw std::runtime_error("Error in deserialization of bootstrap::file_info: "s + e.what());
}
log::info(logcat, "bootstrap file v{}.{}", unsigned(bfi.major_version), unsigned(bfi.minor_version));
log::info(logcat, "bootstrap magic size: {}", sizeof(file_magic));
log::info(logcat, "bootstrap header size: {}", bfi.header_size);
uint64_t full_header_size = sizeof(file_magic) + bfi.header_size;
import_file.seekg(full_header_size);
return full_header_size;
}
uint64_t BootstrapFile::count_bytes(fs::ifstream& import_file, uint64_t blocks, uint64_t& h, bool& quit)
{
uint64_t bytes_read = 0;
uint32_t chunk_size;
char buf1[sizeof(chunk_size)];
std::string str1;
h = 0;
while (1)
{
import_file.read(buf1, sizeof(chunk_size));
if (!import_file) {
std::cout << refresh_string;
log::debug(logcat, "End of file reached");
quit = true;
break;
}
bytes_read += sizeof(chunk_size);
str1.assign(buf1, sizeof(chunk_size));
try {
serialization::parse_binary(str1, chunk_size);
} catch (const std::exception& e) {
throw std::runtime_error("Error in deserialization of chunk_size: "s + e.what());
}
log::debug(logcat, "chunk_size: {}", chunk_size);
if (chunk_size > BUFFER_SIZE)
{
std::cout << refresh_string;
log::warning(logcat, "WARNING: chunk_size {} > BUFFER_SIZE {} height: {}, offset {}", chunk_size, BUFFER_SIZE, h-1, bytes_read);
throw std::runtime_error("Aborting: chunk size exceeds buffer size");
}
if (chunk_size > CHUNK_SIZE_WARNING_THRESHOLD)
{
std::cout << refresh_string;
log::debug(logcat, "NOTE: chunk_size {} > {} height: {}, offset {}", chunk_size, CHUNK_SIZE_WARNING_THRESHOLD, h-1, bytes_read);
}
else if (chunk_size <= 0) {
std::cout << refresh_string;
log::debug(logcat, "ERROR: chunk_size {} <= 0 height: {}, offset {}", chunk_size, h-1, bytes_read);
throw std::runtime_error("Aborting");
}
// skip to next expected block size value
import_file.seekg(chunk_size, std::ios_base::cur);
if (! import_file) {
std::cout << refresh_string;
log::error(logcat, "ERROR: unexpected end of file: bytes read before error: {} of chunk_size {}", import_file.gcount(), chunk_size);
throw std::runtime_error("Aborting");
}
bytes_read += chunk_size;
h += NUM_BLOCKS_PER_CHUNK;
if (h >= blocks)
break;
}
return bytes_read;
}
uint64_t BootstrapFile::count_blocks(const fs::path& import_file_path)
{
std::streampos dummy_pos;
uint64_t dummy_height = 0;
return count_blocks(import_file_path, dummy_pos, dummy_height);
}
// If seek_height is non-zero on entry, return a stream position <= this height when finished.
// And return the actual height corresponding to this position. Allows the caller to locate its
// starting position without having to reread the entire file again.
uint64_t BootstrapFile::count_blocks(const fs::path& import_file_path, std::streampos &start_pos, uint64_t& seek_height)
{
if (std::error_code ec; !fs::exists(import_file_path, ec))
{
log::error(logcat, "bootstrap file not found: {}", import_file_path);
throw std::runtime_error("Aborting");
}
fs::ifstream import_file{import_file_path, std::ios::binary};
uint64_t start_height = seek_height;
uint64_t h = 0;
if (import_file.fail())
{
log::error(logcat, "import_file.open() fail");
throw std::runtime_error("Aborting");
}
uint64_t full_header_size; // 4 byte magic + length of header structures
full_header_size = seek_to_first_chunk(import_file);
log::info(logcat, "Scanning blockchain from bootstrap file...");
bool quit = false;
uint64_t bytes_read = 0, blocks;
int progress_interval = 10;
while (! quit)
{
if (start_height && h + progress_interval >= start_height - 1)
{
start_height = 0;
start_pos = import_file.tellg();
seek_height = h;
}
bytes_read += count_bytes(import_file, progress_interval, blocks, quit);
h += blocks;
std::cout << "\r" << "block height: " << h-1 <<
" \r" <<
std::flush;
// std::cout << refresh_string;
log::debug(logcat, "Number bytes scanned: {}", bytes_read);
}
import_file.close();
std::cout << "\nDone scanning bootstrap file";
std::cout << "\nFull header length: " << full_header_size << " bytes";
std::cout << "\nScanned for blocks: " << bytes_read << " bytes";
std::cout << "\nTotal: " << full_header_size + bytes_read << " bytes";
std::cout << "\nNumber of blocks: " << h;
std::cout << std::endl;
// NOTE: h is the number of blocks.
// Note that a block's stored height is zero-based, but parts of the code use
// one-based height.
return h;
}
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