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blockchain_utilities: new blockchain_blackball tool

Browse source 
It scans for known spent outputs and stores their public keys
in a database which can then be read by the wallet, which can
then avoid using those as fake outs in new transactions.

Usage: monero-blockchain-blackball db1 db2...

This uses the shared database in ~/.shared-ringdb
This commit is contained in:
moneromooo-monero 2018-02-26 16:39:40 +00:00
parent d29ea0455a
commit df6fad4c62
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GPG key ID: 686F07454D6CEFC3
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37
src/blockchain_utilities/CMakeLists.txt
View file

@ -67,6 +67,20 @@ monero_private_headers(blockchain_export
${blockchain_export_private_headers})
set(blockchain_blackball_sources
blockchain_blackball.cpp
)
set(blockchain_blackball_private_headers
bootstrap_file.h
blocksdat_file.h
bootstrap_serialization.h
)
monero_private_headers(blockchain_blackball
${blockchain_blackball_private_headers})
monero_add_executable(blockchain_import
${blockchain_import_sources}
${blockchain_import_private_headers}
@ -117,3 +131,26 @@ set_property(TARGET blockchain_export
OUTPUT_NAME "monero-blockchain-export")
install(TARGETS blockchain_export DESTINATION bin)
monero_add_executable(blockchain_blackball
${blockchain_blackball_sources}
${blockchain_blackball_private_headers})
target_link_libraries(blockchain_blackball
PRIVATE
wallet
cryptonote_core
blockchain_db
p2p
version
epee
${Boost_FILESYSTEM_LIBRARY}
${Boost_SYSTEM_LIBRARY}
${Boost_THREAD_LIBRARY}
${CMAKE_THREAD_LIBS_INIT}
${EXTRA_LIBRARIES})
set_property(TARGET blockchain_blackball
PROPERTY
OUTPUT_NAME "monero-blockchain-blackball")
install(TARGETS blockchain_blackball DESTINATION bin)

423
src/blockchain_utilities/blockchain_blackball.cpp Normal file
View file

@ -0,0 +1,423 @@
// 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 <boost/range/adaptor/transformed.hpp>
#include <boost/algorithm/string.hpp>
#include "common/command_line.h"
#include "common/varint.h"
#include "cryptonote_core/tx_pool.h"
#include "cryptonote_core/cryptonote_core.h"
#include "cryptonote_core/blockchain.h"
#include "blockchain_db/blockchain_db.h"
#include "blockchain_db/db_types.h"
#include "wallet/ringdb.h"
#include "version.h"
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "bcutil"
namespace po = boost::program_options;
using namespace epee;
using namespace cryptonote;
struct output_data
{
uint64_t amount;
uint64_t index;
output_data(uint64_t a, uint64_t i): amount(a), index(i) {}
bool operator==(const output_data &other) const { return other.amount == amount && other.index == index; }
};
namespace std
{
template<> struct hash<output_data>
{
size_t operator()(const output_data &od) const
{
const uint64_t data[2] = {od.amount, od.index};
crypto::hash h;
crypto::cn_fast_hash(data, 2 * sizeof(uint64_t), h);
return reinterpret_cast<const std::size_t &>(h);
}
};
}
static std::string get_default_db_path()
{
boost::filesystem::path dir = tools::get_default_data_dir();
// remove .bitmonero, replace with .shared-ringdb
dir = dir.remove_filename();
dir /= ".shared-ringdb";
return dir.string();
}
static bool for_all_transactions(const std::string &filename, const std::function<bool(const cryptonote::transaction_prefix&)> &f)
{
MDB_env *env;
MDB_dbi dbi;
MDB_txn *txn;
MDB_cursor *cur;
int dbr;
bool tx_active = false;
dbr = mdb_env_create(&env);
if (dbr) throw std::runtime_error("Failed to create LDMB environment: " + std::string(mdb_strerror(dbr)));
dbr = mdb_env_set_maxdbs(env, 2);
if (dbr) throw std::runtime_error("Failed to set max env dbs: " + std::string(mdb_strerror(dbr)));
const std::string actual_filename = filename;
dbr = mdb_env_open(env, actual_filename.c_str(), 0, 0664);
if (dbr) throw std::runtime_error("Failed to open rings database file '"
+ actual_filename + "': " + std::string(mdb_strerror(dbr)));
dbr = mdb_txn_begin(env, NULL, 0, &txn);
if (dbr) throw std::runtime_error("Failed to create LMDB transaction: " + std::string(mdb_strerror(dbr)));
epee::misc_utils::auto_scope_leave_caller txn_dtor = epee::misc_utils::create_scope_leave_handler([&](){if (tx_active) mdb_txn_abort(txn);});
tx_active = true;
dbr = mdb_dbi_open(txn, "txs_pruned", MDB_INTEGERKEY, &dbi);
if (dbr)
dbr = mdb_dbi_open(txn, "txs", MDB_INTEGERKEY, &dbi);
if (dbr) throw std::runtime_error("Failed to open LMDB dbi: " + std::string(mdb_strerror(dbr)));
dbr = mdb_cursor_open(txn, dbi, &cur);
if (dbr) throw std::runtime_error("Failed to create LMDB cursor: " + std::string(mdb_strerror(dbr)));
MDB_val k;
MDB_val v;
bool fret = true;
MDB_cursor_op op = MDB_FIRST;
while (1)
{
int ret = mdb_cursor_get(cur, &k, &v, op);
op = MDB_NEXT;
if (ret == MDB_NOTFOUND)
break;
if (ret)
throw std::runtime_error("Failed to enumerate transactions: " + std::string(mdb_strerror(ret)));
cryptonote::transaction_prefix tx;
blobdata bd;
bd.assign(reinterpret_cast<char*>(v.mv_data), v.mv_size);
std::stringstream ss;
ss << bd;
binary_archive<false> ba(ss);
bool r = do_serialize(ba, tx);
CHECK_AND_ASSERT_MES(r, false, "Failed to parse transaction from blob");
if (!f(tx)) {
fret = false;
break;
}
}
mdb_cursor_close(cur);
mdb_txn_commit(txn);
tx_active = false;
mdb_dbi_close(env, dbi);
mdb_env_close(env);
return fret;
}
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;
tools::on_startup();
boost::filesystem::path output_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, false, true, 2> arg_blackball_db_dir = {
"blackball-db-dir", "Specify blackball database directory",
get_default_db_path(),
{{ &arg_testnet_on, &arg_stagenet_on }},
[](std::array<bool, 2> testnet_stagenet, bool defaulted, std::string val) {
if (testnet_stagenet[0])
return (boost::filesystem::path(val) / "testnet").string();
else if (testnet_stagenet[1])
return (boost::filesystem::path(val) / "stagenet").string();
return val;
}
};
const command_line::arg_descriptor<std::string> arg_log_level = {"log-level", "0-4 or categories", ""};
const command_line::arg_descriptor<std::string> arg_database = {
"database", available_dbs.c_str(), default_db_type
};
const command_line::arg_descriptor<bool> arg_rct_only = {"rct-only", "Only work on ringCT outputs", false};
const command_line::arg_descriptor<std::vector<std::string> > arg_inputs = {"inputs", "Path to Monero DB, and path to any fork DBs"};
command_line::add_arg(desc_cmd_sett, arg_blackball_db_dir);
command_line::add_arg(desc_cmd_sett, cryptonote::arg_testnet_on);
command_line::add_arg(desc_cmd_sett, cryptonote::arg_stagenet_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_rct_only);
command_line::add_arg(desc_cmd_sett, arg_inputs);
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::positional_options_description positional_options;
positional_options.add(arg_inputs.name, -1);
po::variables_map vm;
bool r = command_line::handle_error_helper(desc_options, [&]()
{
auto parser = po::command_line_parser(argc, argv).options(desc_options).positional(positional_options);
po::store(parser.run(), vm);
po::notify(vm);
return true;
});
if (! r)
return 1;
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;
}
mlog_configure(mlog_get_default_log_path("monero-blockchain-blackball.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());
LOG_PRINT_L0("Starting...");
bool opt_testnet = command_line::get_arg(vm, cryptonote::arg_testnet_on);
bool opt_stagenet = command_line::get_arg(vm, cryptonote::arg_stagenet_on);
network_type net_type = opt_testnet ? TESTNET : opt_stagenet ? STAGENET : MAINNET;
output_file_path = command_line::get_arg(vm, arg_blackball_db_dir);
bool opt_rct_only = command_line::get_arg(vm, arg_rct_only);
std::string db_type = command_line::get_arg(vm, arg_database);
if (!cryptonote::blockchain_valid_db_type(db_type))
{
std::cerr << "Invalid database type: " << db_type << std::endl;
return 1;
}
// If we wanted to use the memory pool, we would set up a fake_core.
// Use Blockchain instead of lower-level BlockchainDB for two reasons:
// 1. Blockchain has the init() method for easy setup
// 2. exporter needs to use get_current_blockchain_height(), get_block_id_by_height(), get_block_by_hash()
//
// cannot match blockchain_storage setup above with just one line,
// e.g.
// Blockchain* core_storage = new Blockchain(NULL);
// because unlike blockchain_storage constructor, which takes a pointer to
// tx_memory_pool, Blockchain's constructor takes tx_memory_pool object.
LOG_PRINT_L0("Initializing source blockchain (BlockchainDB)");
const std::vector<std::string> inputs = command_line::get_arg(vm, arg_inputs);
if (inputs.empty())
{
LOG_PRINT_L0("No inputs given");
return 1;
}
std::vector<std::unique_ptr<Blockchain>> core_storage(inputs.size());
tx_memory_pool m_mempool(*(Blockchain*)NULL);
for (size_t n = 0; n < inputs.size(); ++n)
{
core_storage[n].reset(new Blockchain(m_mempool));
BlockchainDB* db = new_db(db_type);
if (db == NULL)
{
LOG_ERROR("Attempted to use non-existent database type: " << db_type);
throw std::runtime_error("Attempting to use non-existent database type");
}
LOG_PRINT_L0("database: " << db_type);
std::string filename = inputs[n];
while (boost::ends_with(filename, "/") || boost::ends_with(filename, "\\"))
filename.pop_back();
LOG_PRINT_L0("Loading blockchain from folder " << filename << " ...");
try
{
db->open(filename, DBF_RDONLY);
}
catch (const std::exception& e)
{
LOG_PRINT_L0("Error opening database: " << e.what());
return 1;
}
r = core_storage[n]->init(db, net_type);
CHECK_AND_ASSERT_MES(r, 1, "Failed to initialize source blockchain storage");
LOG_PRINT_L0("Source blockchain storage initialized OK");
}
boost::filesystem::path direc(output_file_path.string());
if (boost::filesystem::exists(direc))
{
if (!boost::filesystem::is_directory(direc))
{
MERROR("LMDB needs a directory path, but a file was passed: " << output_file_path.string());
return 1;
}
}
else
{
if (!boost::filesystem::create_directories(direc))
{
MERROR("Failed to create directory: " << output_file_path.string());
return 1;
}
}
LOG_PRINT_L0("Scanning for blackballable outputs...");
size_t done = 0;
std::unordered_map<crypto::key_image, std::vector<uint64_t>> relative_rings;
std::unordered_map<output_data, std::unordered_set<crypto::key_image>> outputs;
std::unordered_set<output_data> spent, newly_spent;
for (size_t n = 0; n < inputs.size(); ++n)
{
LOG_PRINT_L0("Reading blockchain from " << inputs[n]);
for_all_transactions(inputs[n], [&](const cryptonote::transaction_prefix &tx)->bool
{
for (const auto &in: tx.vin)
{
if (in.type() != typeid(txin_to_key))
continue;
const auto &txin = boost::get<txin_to_key>(in);
if (opt_rct_only && txin.amount != 0)
continue;
const std::vector<uint64_t> absolute = cryptonote::relative_output_offsets_to_absolute(txin.key_offsets);
if (n == 0)
for (uint64_t out: absolute)
outputs[output_data(txin.amount, out)].insert(txin.k_image);
std::vector<uint64_t> new_ring = txin.key_offsets;
const uint32_t ring_size = txin.key_offsets.size();
if (ring_size == 1)
{
const crypto::public_key pkey = core_storage[n]->get_output_key(txin.amount, txin.key_offsets[0]);
MINFO("Blackballing output " << pkey << ", due to being used in a 1-ring");
tools::ringdb::blackball(output_file_path.string(), pkey);
newly_spent.insert(output_data(txin.amount, txin.key_offsets[0]));
spent.insert(output_data(txin.amount, txin.key_offsets[0]));
}
else if (relative_rings.find(txin.k_image) != relative_rings.end())
{
MINFO("Key image " << txin.k_image << " already seen: rings " <<
boost::join(relative_rings[txin.k_image] | boost::adaptors::transformed([](uint64_t out){return std::to_string(out);}), " ") <<
", " << boost::join(txin.key_offsets | boost::adaptors::transformed([](uint64_t out){return std::to_string(out);}), " "));
if (relative_rings[txin.k_image] != txin.key_offsets)
{
MINFO("Rings are different");
const std::vector<uint64_t> r0 = cryptonote::relative_output_offsets_to_absolute(relative_rings[txin.k_image]);
const std::vector<uint64_t> r1 = cryptonote::relative_output_offsets_to_absolute(txin.key_offsets);
std::vector<uint64_t> common;
for (uint64_t out: r0)
{
if (std::find(r1.begin(), r1.end(), out) != r1.end())
common.push_back(out);
}
if (common.empty())
{
MERROR("Rings for the same key image are disjoint");
}
else if (common.size() == 1)
{
const crypto::public_key pkey = core_storage[n]->get_output_key(txin.amount, common[0]);
MINFO("Blackballing output " << pkey << ", due to being used in rings with a single common element");
tools::ringdb::blackball(output_file_path.string(), pkey);
newly_spent.insert(output_data(txin.amount, common[0]));
spent.insert(output_data(txin.amount, common[0]));
}
else
{
MINFO("The intersection has more than one element, it's still ok");
for (const auto &out: r0)
if (std::find(common.begin(), common.end(), out) != common.end())
new_ring.push_back(out);
new_ring = cryptonote::absolute_output_offsets_to_relative(new_ring);
}
}
}
relative_rings[txin.k_image] = new_ring;
}
return true;
});
}
while (!newly_spent.empty())
{
LOG_PRINT_L0("Secondary pass due to " << newly_spent.size() << " newly found spent outputs");
std::unordered_set<output_data> work_spent = std::move(newly_spent);
newly_spent.clear();
for (const output_data &od: work_spent)
{
for (const crypto::key_image &ki: outputs[od])
{
std::vector<uint64_t> absolute = cryptonote::relative_output_offsets_to_absolute(relative_rings[ki]);
size_t known = 0;
uint64_t last_unknown = 0;
for (uint64_t out: absolute)
{
output_data new_od(od.amount, out);
if (spent.find(new_od) != spent.end())
++known;
else
last_unknown = out;
}
if (known == absolute.size() - 1)
{
const crypto::public_key pkey = core_storage[0]->get_output_key(od.amount, last_unknown);
MINFO("Blackballing output " << pkey << ", due to being used in rings where all other outputs are known to be spent");
tools::ringdb::blackball(output_file_path.string(), pkey);
newly_spent.insert(output_data(od.amount, last_unknown));
spent.insert(output_data(od.amount, last_unknown));
}
}
}
}
LOG_PRINT_L0("Blockchain blackball data exported OK");
return 0;
CATCH_ENTRY("Export error", 1);
}