new blockchain_usage tool, reports on output usage

src/blockchain_utilities/CMakeLists.txt

@@ -80,6 +80,16 @@ set(blockchain_blackball_private_headers
 monero_private_headers(blockchain_blackball
 	  ${blockchain_blackball_private_headers})
 
+set(blockchain_usage_sources
+  blockchain_usage.cpp
+  )
+
+set(blockchain_usage_private_headers)
+
+monero_private_headers(blockchain_usage
+	  ${blockchain_usage_private_headers})
+
+
 
 monero_add_executable(blockchain_import
   ${blockchain_import_sources}
@@ -154,3 +164,26 @@ set_property(TARGET blockchain_blackball
 	OUTPUT_NAME "monero-blockchain-blackball")
 install(TARGETS blockchain_blackball DESTINATION bin)
 
+
+monero_add_executable(blockchain_usage
+  ${blockchain_usage_sources}
+  ${blockchain_usage_private_headers})
+
+target_link_libraries(blockchain_usage
+  PRIVATE
+    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_usage
+	PROPERTY
+	OUTPUT_NAME "monero-blockchain-usage")
+install(TARGETS blockchain_usage DESTINATION bin)
+

src/blockchain_utilities/blockchain_usage.cpp

@@ -0,0 +1,256 @@
+// 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 "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;
+  mutable bool coinbase;
+  mutable uint64_t height;
+  output_data(uint64_t a, uint64_t i, bool cb, uint64_t h): amount(a), index(i), coinbase(cb), height(h) {}
+  bool operator==(const output_data &other) const { return other.amount == amount && other.index == index; }
+  void info(bool c, uint64_t h) const { coinbase = c; height =h; }
+};
+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);
+    }
+  };
+}
+
+struct reference
+{
+  uint64_t height;
+  uint64_t ring_size;
+  uint64_t position;
+  reference(uint64_t h, uint64_t rs, uint64_t p): height(h), ring_size(rs), position(p) {}
+};
+
+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> 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::string> arg_input = {"input", ""};
+
+  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_input);
+  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_input.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-usage.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;
+  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::string input = command_line::get_arg(vm, arg_input);
+  std::unique_ptr<Blockchain> core_storage;
+  tx_memory_pool m_mempool(*core_storage);
+  core_storage.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);
+
+  const std::string filename = input;
+  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->init(db, net_type);
+
+  CHECK_AND_ASSERT_MES(r, 1, "Failed to initialize source blockchain storage");
+  LOG_PRINT_L0("Source blockchain storage initialized OK");
+
+  LOG_PRINT_L0("Building usage patterns...");
+
+  size_t done = 0;
+  std::unordered_map<output_data, std::list<reference>> outputs;
+  std::unordered_map<uint64_t,uint64_t> indices;
+
+  LOG_PRINT_L0("Reading blockchain from " << input);
+  core_storage->for_all_transactions([&](const crypto::hash &hash, const cryptonote::transaction &tx)->bool
+  {
+    const bool coinbase = tx.vin.size() == 1 && tx.vin[0].type() == typeid(txin_gen);
+    const uint64_t height = core_storage->get_db().get_tx_block_height(hash);
+
+    // create new outputs
+    for (const auto &out: tx.vout)
+    {
+      if (opt_rct_only && out.amount)
+        continue;
+      uint64_t index = indices[out.amount]++;
+      output_data od(out.amount, indices[out.amount], coinbase, height);
+      auto itb = outputs.emplace(od, std::list<reference>());
+      itb.first->first.info(coinbase, height);
+    }
+
+    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);
+      for (size_t n = 0; n < txin.key_offsets.size(); ++n)
+      {
+        output_data od(txin.amount, absolute[n], coinbase, height);
+        outputs[od].push_back(reference(height, txin.key_offsets.size(), n));
+      }
+    }
+    return true;
+  });
+
+  std::unordered_map<uint64_t, uint64_t> counts;
+  size_t total = 0;
+  for (const auto &out: outputs)
+  {
+    counts[out.second.size()]++;
+    total++;
+  }
+  for (const auto &c: counts)
+  {
+    float percent = 100.f * c.second / total;
+    MINFO(std::to_string(c.second) << " outputs used " << c.first << " times (" << percent << "%)");
+  }
+
+  LOG_PRINT_L0("Blockchain usage exported OK");
+  return 0;
+
+  CATCH_ENTRY("Export error", 1);
+}