blockchain_prune_known_spent_data.cpp File Reference

#include <boost/algorithm/string.hpp>
#include "common/command_line.h"
#include "serialization/crypto.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"

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Macros
#define	ELECTRONEUM_DEFAULT_LOG_CATEGORY   "bcutil"

Functions
int	main (int argc, char *argv[])

Macro Definition Documentation

ELECTRONEUM_DEFAULT_LOG_CATEGORY

#define ELECTRONEUM_DEFAULT_LOG_CATEGORY   "bcutil"

Definition at line 40 of file blockchain_prune_known_spent_data.cpp.

Function Documentation

main()

int main	(	int	argc,
		char *	argv[] )

Definition at line 99 of file blockchain_prune_known_spent_data.cpp.

{
  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();
 
  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_verbose  = {"verbose", "Verbose output", false};
  const command_line::arg_descriptor<bool> arg_dry_run  = {"dry-run", "Do not actually prune", false};
  const command_line::arg_descriptor<std::string> arg_input = {"input", "Path to the known spent outputs file"};
 
  command_line::add_arg(desc_cmd_sett, cryptonote::arg_data_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_verbose);
  command_line::add_arg(desc_cmd_sett, arg_dry_run);
  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::variables_map vm;
  bool r = command_line::handle_error_helper(desc_options, [&]()
  {
    auto parser = po::command_line_parser(argc, argv).options(desc_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 << "Electroneum '" << ELECTRONEUM_RELEASE_NAME << "' (v" << ELECTRONEUM_VERSION_FULL << ")" << ENDL << ENDL;
    std::cout << desc_options << std::endl;
    return 1;
  }
 
  mlog_configure(mlog_get_default_log_path("electroneum-blockchain-prune-known-spent-data.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...");
 
  std::string opt_data_dir = command_line::get_arg(vm, cryptonote::arg_data_dir);
  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_verbose = command_line::get_arg(vm, arg_verbose);
  bool opt_dry_run = command_line::get_arg(vm, arg_dry_run);
 
  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;
  }
 
  const std::string input = command_line::get_arg(vm, arg_input);
 
  LOG_PRINT_L0("Initializing source blockchain (BlockchainDB)");
  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 = (boost::filesystem::path(opt_data_dir) / db->get_db_name()).string();
  LOG_PRINT_L0("Loading blockchain from folder " << filename << " ...");
 
  try
  {
    db->open(filename, 0);
  }
  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");
 
  std::map<uint64_t, uint64_t> known_spent_outputs;
  if (input.empty())
  {
    std::map<uint64_t, std::pair<uint64_t, uint64_t>> outputs;
 
    LOG_PRINT_L0("Scanning for known spent data...");
    db->for_all_transactions([&](const crypto::hash &txid, const cryptonote::transaction &tx){
      const bool miner_tx = tx.vin.size() == 1 && tx.vin[0].type() == typeid(txin_gen);
      for (const auto &in: tx.vin)
      {
        if (in.type() != typeid(txin_to_key))
          continue;
        const auto &txin = boost::get<txin_to_key>(in);
        if (txin.amount == 0)
          continue;
 
        outputs[txin.amount].second++;
      }
 
      for (const auto &out: tx.vout)
      {
        uint64_t amount = out.amount;
        if (out.target.type() != typeid(txout_to_key))
          continue;
 
        outputs[amount].first++;
      }
      return true;
    }, true);
 
    for (const auto &i: outputs)
    {
      known_spent_outputs[i.first] = i.second.second;
    }
  }
  else
  {
    LOG_PRINT_L0("Loading known spent data...");
    known_spent_outputs = load_outputs(input);
  }
 
  LOG_PRINT_L0("Pruning known spent data...");
 
  bool stop_requested = false;
  tools::signal_handler::install([&stop_requested](int type) {
    stop_requested = true;
  });
 
  db->batch_start();
 
  size_t num_total_outputs = 0, num_prunable_outputs = 0, num_known_spent_outputs = 0, num_eligible_outputs = 0, num_eligible_known_spent_outputs = 0;
  for (auto i = known_spent_outputs.begin(); i != known_spent_outputs.end(); ++i)
  {
    uint64_t num_outputs = db->get_num_outputs(i->first);
    num_total_outputs += num_outputs;
    num_known_spent_outputs += i->second;
    if (i->first == 0 || is_valid_decomposed_amount(i->first))
    {
      if (opt_verbose)
        MINFO("Ignoring output value " << i->first << ", with " << num_outputs << " outputs");
      continue;
    }
    num_eligible_outputs += num_outputs;
    num_eligible_known_spent_outputs += i->second;
    if (opt_verbose)
      MINFO(i->first << ": " << i->second << "/" << num_outputs);
    if (num_outputs > i->second)
      continue;
    if (num_outputs && num_outputs < i->second)
    {
      MERROR("More outputs are spent than known for amount " << i->first << ", not touching");
      continue;
    }
    if (opt_verbose)
      MINFO("Pruning data for " << num_outputs << " outputs");
    if (!opt_dry_run)
      db->prune_outputs(i->first);
    num_prunable_outputs += i->second;
  }
 
  db->batch_stop();
 
  MINFO("Total outputs: " << num_total_outputs);
  MINFO("Known spent outputs: " << num_known_spent_outputs);
  MINFO("Eligible outputs: " << num_eligible_outputs);
  MINFO("Eligible known spent outputs: " << num_eligible_known_spent_outputs);
  MINFO("Prunable outputs: " << num_prunable_outputs);
 
  LOG_PRINT_L0("Blockchain known spent data pruned OK");
  core_storage->deinit();
  return 0;
 
  CATCH_ENTRY("Error", 1);
}

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