monero/src/simplewallet/simplewallet.cpp

// Copyright (c) 2014, 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
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// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers

/*!
 * \file simplewallet.cpp
 * 
 * \brief Source file that defines simple_wallet class.
 */

#include <thread>
#include <iostream>
#include <sstream>
#include <boost/lexical_cast.hpp>
#include <boost/program_options.hpp>
#include <boost/algorithm/string.hpp>
#include "include_base_utils.h"
#include "common/command_line.h"
#include "common/util.h"
#include "p2p/net_node.h"
#include "cryptonote_protocol/cryptonote_protocol_handler.h"
#include "simplewallet.h"
#include "cryptonote_core/cryptonote_format_utils.h"
#include "storages/http_abstract_invoke.h"
#include "rpc/core_rpc_server_commands_defs.h"
#include "wallet/wallet_rpc_server.h"
#include "version.h"
#include "crypto/crypto.h"  // for crypto::secret_key definition
#include "mnemonics/electrum-words.h"
#include <stdexcept>

#if defined(WIN32)
#include <crtdbg.h>
#endif

using namespace std;
using namespace epee;
using namespace cryptonote;
using boost::lexical_cast;
namespace po = boost::program_options;

#define EXTENDED_LOGS_FILE "wallet_details.log"


namespace
{
  const command_line::arg_descriptor<std::string> arg_wallet_file = {"wallet-file", "Use wallet <arg>", ""};
  const command_line::arg_descriptor<std::string> arg_generate_new_wallet = {"generate-new-wallet", "Generate new wallet and save it to <arg> or <address>.wallet by default", ""};
  const command_line::arg_descriptor<std::string> arg_daemon_address = {"daemon-address", "Use daemon instance at <host>:<port>", ""};
  const command_line::arg_descriptor<std::string> arg_daemon_host = {"daemon-host", "Use daemon instance at host <arg> instead of localhost", ""};
  const command_line::arg_descriptor<std::string> arg_password = {"password", "Wallet password", "", true};
  const command_line::arg_descriptor<std::string> arg_electrum_seed = {"electrum-seed", "Specify electrum seed for wallet recovery/creation", ""};
  const command_line::arg_descriptor<bool> arg_restore_deterministic_wallet = {"restore-deterministic-wallet", "Recover wallet using electrum-style mnemonic", false};
  const command_line::arg_descriptor<bool> arg_non_deterministic = {"non-deterministic", "creates non-deterministic view and spend keys", false};
  const command_line::arg_descriptor<int> arg_daemon_port = {"daemon-port", "Use daemon instance at port <arg> instead of 8081", 0};
  const command_line::arg_descriptor<uint32_t> arg_log_level = {"set_log", "", 0, true};
  const command_line::arg_descriptor<bool> arg_testnet = {"testnet", "Used to deploy test nets. The daemon must be launched with --testnet flag", false};

  const command_line::arg_descriptor< std::vector<std::string> > arg_command = {"command", ""};

  inline std::string interpret_rpc_response(bool ok, const std::string& status)
  {
    std::string err;
    if (ok)
    {
      if (status == CORE_RPC_STATUS_BUSY)
      {
        err = "daemon is busy. Please try later";
      }
      else if (status != CORE_RPC_STATUS_OK)
      {
        err = status;
      }
    }
    else
    {
      err = "possible lost connection to daemon";
    }
    return err;
  }

  class message_writer
  {
  public:
    message_writer(epee::log_space::console_colors color = epee::log_space::console_color_default, bool bright = false,
      std::string&& prefix = std::string(), int log_level = LOG_LEVEL_2)
      : m_flush(true)
      , m_color(color)
      , m_bright(bright)
      , m_log_level(log_level)
    {
      m_oss << prefix;
    }

    message_writer(message_writer&& rhs)
      : m_flush(std::move(rhs.m_flush))
#if defined(_MSC_VER)
      , m_oss(std::move(rhs.m_oss))
#else
      // GCC bug: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54316
      , m_oss(rhs.m_oss.str(), ios_base::out | ios_base::ate)
#endif
      , m_color(std::move(rhs.m_color))
      , m_log_level(std::move(rhs.m_log_level))
    {
      rhs.m_flush = false;
    }

    template<typename T>
    std::ostream& operator<<(const T& val)
    {
      m_oss << val;
      return m_oss;
    }

    ~message_writer()
    {
      if (m_flush)
      {
        m_flush = false;

        LOG_PRINT(m_oss.str(), m_log_level)

        if (epee::log_space::console_color_default == m_color)
        {
          std::cout << m_oss.str();
        }
        else
        {
          epee::log_space::set_console_color(m_color, m_bright);
          std::cout << m_oss.str();
          epee::log_space::reset_console_color();
        }
        std::cout << std::endl;
      }
    }

  private:
    message_writer(message_writer& rhs);
    message_writer& operator=(message_writer& rhs);
    message_writer& operator=(message_writer&& rhs);

  private:
    bool m_flush;
    std::stringstream m_oss;
    epee::log_space::console_colors m_color;
    bool m_bright;
    int m_log_level;
  };

  message_writer success_msg_writer(bool color = false)
  {
    return message_writer(color ? epee::log_space::console_color_green : epee::log_space::console_color_default, false, std::string(), LOG_LEVEL_2);
  }

  message_writer fail_msg_writer()
  {
    return message_writer(epee::log_space::console_color_red, true, "Error: ", LOG_LEVEL_0);
  }
}


std::string simple_wallet::get_commands_str()
{
  std::stringstream ss;
  ss << "Commands: " << ENDL;
  std::string usage = m_cmd_binder.get_usage();
  boost::replace_all(usage, "\n", "\n  ");
  usage.insert(0, "  ");
  ss << usage << ENDL;
  return ss.str();
}

bool simple_wallet::viewkey(const std::vector<std::string> &args/* = std::vector<std::string>()*/)
{
  success_msg_writer() << string_tools::pod_to_hex(m_wallet->get_account().get_keys().m_view_secret_key) << std::endl;

  return true;
}

bool simple_wallet::seed(const std::vector<std::string> &args/* = std::vector<std::string>()*/)
{
  bool success =  false;
  std::string electrum_words;

  if (m_wallet->is_deterministic())
  {
    if (m_wallet->get_seed_language().empty())
    {
      std::string mnemonic_language = get_mnemonic_language();
      m_wallet->set_seed_language(mnemonic_language);
    }

    success = m_wallet->get_seed(electrum_words);
  }

  if (success) 
  {
    print_seed(electrum_words);
  }
  else
  {
    fail_msg_writer() << "The wallet is non-deterministic. Cannot display seed.";
  }
  return true;
}

bool simple_wallet::help(const std::vector<std::string> &args/* = std::vector<std::string>()*/)
{
  success_msg_writer() << get_commands_str();
  return true;
}

simple_wallet::simple_wallet()
  : m_daemon_port(0)
  , m_refresh_progress_reporter(*this)
{
  m_cmd_binder.set_handler("start_mining", boost::bind(&simple_wallet::start_mining, this, _1), "start_mining [<number_of_threads>] - Start mining in daemon");
  m_cmd_binder.set_handler("stop_mining", boost::bind(&simple_wallet::stop_mining, this, _1), "Stop mining in daemon");
  m_cmd_binder.set_handler("save_bc", boost::bind(&simple_wallet::save_bc, this, _1), "Save current blockchain data");
  m_cmd_binder.set_handler("refresh", boost::bind(&simple_wallet::refresh, this, _1), "Resynchronize transactions and balance");
  m_cmd_binder.set_handler("balance", boost::bind(&simple_wallet::show_balance, this, _1), "Show current wallet balance");
  m_cmd_binder.set_handler("incoming_transfers", boost::bind(&simple_wallet::show_incoming_transfers, this, _1), "incoming_transfers [available|unavailable] - Show incoming transfers - all of them or filter them by availability");
  m_cmd_binder.set_handler("payments", boost::bind(&simple_wallet::show_payments, this, _1), "payments <payment_id_1> [<payment_id_2> ... <payment_id_N>] - Show payments <payment_id_1>, ... <payment_id_N>");
  m_cmd_binder.set_handler("bc_height", boost::bind(&simple_wallet::show_blockchain_height, this, _1), "Show blockchain height");
  m_cmd_binder.set_handler("transfer", boost::bind(&simple_wallet::transfer, this, _1), "transfer <mixin_count> <addr_1> <amount_1> [<addr_2> <amount_2> ... <addr_N> <amount_N>] [payment_id] - Transfer <amount_1>,... <amount_N> to <address_1>,... <address_N>, respectively. <mixin_count> is the number of transactions yours is indistinguishable from (from 0 to maximum available)");
  m_cmd_binder.set_handler("set_log", boost::bind(&simple_wallet::set_log, this, _1), "set_log <level> - Change current log detalization level, <level> is a number 0-4");
  m_cmd_binder.set_handler("address", boost::bind(&simple_wallet::print_address, this, _1), "Show current wallet public address");
  m_cmd_binder.set_handler("save", boost::bind(&simple_wallet::save, this, _1), "Save wallet synchronized data");
  m_cmd_binder.set_handler("viewkey", boost::bind(&simple_wallet::viewkey, this, _1), "Get viewkey");
  m_cmd_binder.set_handler("seed", boost::bind(&simple_wallet::seed, this, _1), "Get deterministic seed");
  m_cmd_binder.set_handler("help", boost::bind(&simple_wallet::help, this, _1), "Show this help");
}
//----------------------------------------------------------------------------------------------------
bool simple_wallet::set_log(const std::vector<std::string> &args)
{
  if(args.size() != 1)
  {
    fail_msg_writer() << "use: set_log <log_level_number_0-4>";
    return true;
  }
  uint16_t l = 0;
  if(!epee::string_tools::get_xtype_from_string(l, args[0]))
  {
    fail_msg_writer() << "wrong number format, use: set_log <log_level_number_0-4>";
    return true;
  }
  if(LOG_LEVEL_4 < l)
  {
    fail_msg_writer() << "wrong number range, use: set_log <log_level_number_0-4>";
    return true;
  }

  log_space::log_singletone::get_set_log_detalisation_level(true, l);
  return true;
}
//----------------------------------------------------------------------------------------------------
bool simple_wallet::ask_wallet_create_if_needed()
{
  std::string wallet_path;

  wallet_path = command_line::input_line(
      "Specify wallet file name (e.g., wallet.bin). If the wallet doesn't exist, it will be created.\n"
      "Wallet file name: "
  );

  bool keys_file_exists;
  bool wallet_file_exists;
  tools::wallet2::wallet_exists(wallet_path, keys_file_exists, wallet_file_exists);

  // add logic to error out if new wallet requested but named wallet file exists
  if (keys_file_exists || wallet_file_exists)
  {
    if (!m_generate_new.empty() || m_restore_deterministic_wallet)
    {
      fail_msg_writer() << "Attempting to generate or restore wallet, but specified file(s) exist.  Exiting to not risk overwriting.";
      return false;
    }
  }

  bool r;
  if(keys_file_exists)
  {
    m_wallet_file = wallet_path;
    r = true;
  }else
  {
    if(!wallet_file_exists)
    {
      std::cout << "The wallet doesn't exist, generating new one" << std::endl;
      m_generate_new = wallet_path;
      r = true;
    }else
    {
      fail_msg_writer() << "failed to open wallet \"" << wallet_path << "\". Keys file wasn't found";
      r = false;
    }
  }

  return r;
}

/*!
 * \brief Prints the seed with a nice message
 * \param seed seed to print
 */
void simple_wallet::print_seed(std::string seed)
{
  success_msg_writer(true) << "\nPLEASE NOTE: the following 25 words can be used to recover access to your wallet. " << 
    "Please write them down and store them somewhere safe and secure. Please do not store them in " << 
    "your email or on file storage services outside of your immediate control.\n";
  boost::replace_nth(seed, " ", 15, "\n");
  boost::replace_nth(seed, " ", 7, "\n");
  std::cout << seed << std::endl;
}

//----------------------------------------------------------------------------------------------------
bool simple_wallet::init(const boost::program_options::variables_map& vm)
{
  handle_command_line(vm);

  if (!m_daemon_address.empty() && !m_daemon_host.empty() && 0 != m_daemon_port)
  {
    fail_msg_writer() << "you can't specify daemon host or port several times";
    return false;
  }

  if(!m_generate_new.empty() && !m_wallet_file.empty())
  {
    fail_msg_writer() << "Specifying both --generate-new-wallet=\"wallet_name\" and --wallet-file=\"wallet_name\" doesn't make sense!";
    return false;
  }
  else if (m_generate_new.empty() && m_wallet_file.empty())
  {
    if(!ask_wallet_create_if_needed()) return false;
  }

  bool testnet = command_line::get_arg(vm, arg_testnet);

  if (m_daemon_host.empty())
    m_daemon_host = "localhost";

  if (!m_daemon_port)
  {
    m_daemon_port = testnet ? config::testnet::RPC_DEFAULT_PORT : config::RPC_DEFAULT_PORT;
  }

  if (m_daemon_address.empty())
    m_daemon_address = std::string("http://") + m_daemon_host + ":" + std::to_string(m_daemon_port);

  tools::password_container pwd_container;
  if (command_line::has_arg(vm, arg_password))
  {
    pwd_container.password(command_line::get_arg(vm, arg_password));
  }
  else
  {
    bool r = pwd_container.read_password();
    if (!r)
    {
      fail_msg_writer() << "failed to read wallet password";
      return false;
    }
  }

  if (!m_generate_new.empty() || m_restore_deterministic_wallet)
  {
    if (m_wallet_file.empty()) m_wallet_file = m_generate_new;  // alias for simplicity later

    std::string old_language;
    // check for recover flag.  if present, require electrum word list (only recovery option for now).
    if (m_restore_deterministic_wallet)
    {
      if (m_non_deterministic)
      {
        fail_msg_writer() << "Cannot specify both --restore-deterministic-wallet and --non-deterministic";
        return false;
      }

      if (m_electrum_seed.empty())
      {
        m_electrum_seed = command_line::input_line("Specify electrum seed: ");
        if (m_electrum_seed.empty())
        {
          fail_msg_writer() << "specify a recovery parameter with the --electrum-seed=\"words list here\"";
          return false;
        }
      }

      if (!crypto::ElectrumWords::words_to_bytes(m_electrum_seed, m_recovery_key, old_language))
      {
        fail_msg_writer() << "electrum-style word list failed verification";
        return false;
      }
    }
    bool r = new_wallet(m_wallet_file, pwd_container.password(), m_recovery_key, m_restore_deterministic_wallet,
      m_non_deterministic, testnet, old_language);
    CHECK_AND_ASSERT_MES(r, false, "account creation failed");
  }
  else
  {
    bool r = open_wallet(m_wallet_file, pwd_container.password(), testnet);
    CHECK_AND_ASSERT_MES(r, false, "could not open account");
  }

  return true;
}
//----------------------------------------------------------------------------------------------------
bool simple_wallet::deinit()
{
  if (!m_wallet.get())
    return true;

  return close_wallet();
}
//----------------------------------------------------------------------------------------------------
void simple_wallet::handle_command_line(const boost::program_options::variables_map& vm)
{
  m_wallet_file                   = command_line::get_arg(vm, arg_wallet_file);
  m_generate_new                  = command_line::get_arg(vm, arg_generate_new_wallet);
  m_daemon_address                = command_line::get_arg(vm, arg_daemon_address);
  m_daemon_host                   = command_line::get_arg(vm, arg_daemon_host);
  m_daemon_port                   = command_line::get_arg(vm, arg_daemon_port);
  m_electrum_seed                 = command_line::get_arg(vm, arg_electrum_seed);
  m_restore_deterministic_wallet  = command_line::get_arg(vm, arg_restore_deterministic_wallet);
  m_non_deterministic             = command_line::get_arg(vm, arg_non_deterministic);
}
//----------------------------------------------------------------------------------------------------
bool simple_wallet::try_connect_to_daemon()
{
  if (!m_wallet->check_connection())
  {
    fail_msg_writer() << "wallet failed to connect to daemon (" << m_daemon_address << "). " <<
      "Daemon either is not started or passed wrong port. " <<
      "Please, make sure that daemon is running or restart the wallet with correct daemon address.";
    return false;
  }
  return true;
}

/*!
 * \brief Gets the word seed language from the user.
 * 
 * User is asked to choose from a list of supported languages.
 * 
 * \return The chosen language.
 */
std::string simple_wallet::get_mnemonic_language()
{
  std::vector<std::string> language_list;
  std::string language_choice;
  int language_number = -1;
  crypto::ElectrumWords::get_language_list(language_list);
  std::cout << "List of available languages for your wallet's seed:" << std::endl;
  int ii;
  std::vector<std::string>::iterator it;
  for (it = language_list.begin(), ii = 0; it != language_list.end(); it++, ii++)
  {
    std::cout << ii << " : " << *it << std::endl;
  }
  while (language_number < 0)
  {
    language_choice = command_line::input_line("Enter the number corresponding to the language of your choice: ");
    try
    {
      language_number = std::stoi(language_choice);
      if (!((language_number >= 0) && (static_cast<unsigned int>(language_number) < language_list.size())))
      {
        language_number = -1;
        fail_msg_writer() << "Invalid language choice passed. Please try again.\n";
      }
    }
    catch (std::exception &e)
    {
      fail_msg_writer() << "Invalid language choice passed. Please try again.\n";
    }
  }
  return language_list[language_number];
}

//----------------------------------------------------------------------------------------------------
bool simple_wallet::new_wallet(const std::string &wallet_file, const std::string& password, const crypto::secret_key& recovery_key,
  bool recover, bool two_random, bool testnet, const std::string &old_language)
{
  bool was_deprecated_wallet = m_restore_deterministic_wallet && ((old_language == crypto::ElectrumWords::old_language_name) ||
    crypto::ElectrumWords::get_is_old_style_seed(m_electrum_seed));

  std::string mnemonic_language = old_language;
  // Ask for seed language if:
  // it's a deterministic wallet AND
  // (it is not a wallet restore OR if it was a deprecated wallet
  // that was earlier used before this restore)
  if ((!two_random) && (!m_restore_deterministic_wallet || was_deprecated_wallet))
  {
    if (was_deprecated_wallet)
    {
      // The user had used an older version of the wallet with old style mnemonics.
      message_writer(epee::log_space::console_color_green, false) << "\nYou had been using " <<
        "a deprecated version of the wallet. Please use the new seed that we provide.\n";
    }
    mnemonic_language = get_mnemonic_language();
  }

  m_wallet_file = wallet_file;

  m_wallet.reset(new tools::wallet2(testnet));
  m_wallet->callback(this);
  m_wallet->set_seed_language(mnemonic_language);

  crypto::secret_key recovery_val;
  try
  {
    recovery_val = m_wallet->generate(wallet_file, password, recovery_key, recover, two_random);
    message_writer(epee::log_space::console_color_white, true) << "Generated new wallet: "
      << m_wallet->get_account().get_public_address_str(m_wallet->testnet()) << std::endl << "view key: "
      << string_tools::pod_to_hex(m_wallet->get_account().get_keys().m_view_secret_key);
  }
  catch (const std::exception& e)
  {
    fail_msg_writer() << "failed to generate new wallet: " << e.what();
    return false;
  }

  m_wallet->init(m_daemon_address);

  // convert rng value to electrum-style word list
  std::string electrum_words;

  crypto::ElectrumWords::bytes_to_words(recovery_val, electrum_words, mnemonic_language);

  success_msg_writer() <<
    "**********************************************************************\n" <<
    "Your wallet has been generated.\n" <<
    "To start synchronizing with the daemon use \"refresh\" command.\n" <<
    "Use \"help\" command to see the list of available commands.\n" <<
    "Always use \"exit\" command when closing simplewallet to save\n" <<
    "current session's state. Otherwise, you will possibly need to synchronize \n" <<
    "your wallet again. Your wallet key is NOT under risk anyway.\n"
  ;

  if (!two_random)
  {
    print_seed(electrum_words);
  }
  success_msg_writer() << "**********************************************************************";

  return true;
}
//----------------------------------------------------------------------------------------------------
bool simple_wallet::open_wallet(const string &wallet_file, const std::string& password, bool testnet)
{
  m_wallet_file = wallet_file;
  m_wallet.reset(new tools::wallet2(testnet));
  m_wallet->callback(this);

  try
  {
    m_wallet->load(m_wallet_file, password);
    message_writer(epee::log_space::console_color_white, true) << "Opened wallet: "
      << m_wallet->get_account().get_public_address_str(m_wallet->testnet());
    // If the wallet file is deprecated, we should ask for mnemonic language again and store
    // everything in the new format.
    // NOTE: this is_deprecated() refers to the wallet file format before becoming JSON. It does not refer to the "old english" seed words form of "deprecated" used elsewhere.
    if (m_wallet->is_deprecated())
    {
      if (m_wallet->is_deterministic())
      {
        message_writer(epee::log_space::console_color_green, false) << "\nYou had been using " <<
          "a deprecated version of the wallet. Please proceed to upgrade your wallet.\n";
        std::string mnemonic_language = get_mnemonic_language();
        m_wallet->set_seed_language(mnemonic_language);
        m_wallet->rewrite(m_wallet_file, password);

        // Display the seed
        std::string seed;
        m_wallet->get_seed(seed);
        print_seed(seed);
      }
      else
      {
        message_writer(epee::log_space::console_color_green, false) << "\nYou had been using " <<
          "a deprecated version of the wallet. Your wallet file format is being upgraded now.\n";
          m_wallet->rewrite(m_wallet_file, password);
      }
    }
  }
  catch (const std::exception& e)
  {
    fail_msg_writer() << "failed to load wallet: " << e.what();
    return false;
  }

  m_wallet->init(m_daemon_address);

  refresh(std::vector<std::string>());
  success_msg_writer() <<
    "**********************************************************************\n" <<
    "Use \"help\" command to see the list of available commands.\n" <<
    "**********************************************************************";
  return true;
}
//----------------------------------------------------------------------------------------------------
bool simple_wallet::close_wallet()
{
  bool r = m_wallet->deinit();
  if (!r)
  {
    fail_msg_writer() << "failed to deinit wallet";
    return false;
  }

  try
  {
    m_wallet->store();
  }
  catch (const std::exception& e)
  {
    fail_msg_writer() << e.what();
    return false;
  }

  return true;
}
//----------------------------------------------------------------------------------------------------
bool simple_wallet::save(const std::vector<std::string> &args)
{
  try
  {
    m_wallet->store();
    success_msg_writer() << "Wallet data saved";
  }
  catch (const std::exception& e)
  {
    fail_msg_writer() << e.what();
  }

  return true;
}
//----------------------------------------------------------------------------------------------------
bool simple_wallet::start_mining(const std::vector<std::string>& args)
{
  if (!try_connect_to_daemon())
    return true;

  COMMAND_RPC_START_MINING::request req;
  req.miner_address = m_wallet->get_account().get_public_address_str(m_wallet->testnet());

  bool ok = true;
  size_t max_mining_threads_count = (std::max)(std::thread::hardware_concurrency(), static_cast<unsigned>(2));
  if (0 == args.size())
  {
    req.threads_count = 1;
  }
  else if (1 == args.size())
  {
    uint16_t num = 1;
    ok = string_tools::get_xtype_from_string(num, args[0]);
    ok = ok && (1 <= num && num <= max_mining_threads_count);
    req.threads_count = num;
  }
  else
  {
    ok = false;
  }

  if (!ok)
  {
    fail_msg_writer() << "invalid arguments. Please use start_mining [<number_of_threads>], " <<
      "<number_of_threads> should be from 1 to " << max_mining_threads_count;
    return true;
  }

  COMMAND_RPC_START_MINING::response res;
  bool r = net_utils::invoke_http_json_remote_command2(m_daemon_address + "/start_mining", req, res, m_http_client);
  std::string err = interpret_rpc_response(r, res.status);
  if (err.empty())
    success_msg_writer() << "Mining started in daemon";
  else
    fail_msg_writer() << "mining has NOT been started: " << err;
  return true;
}
//----------------------------------------------------------------------------------------------------
bool simple_wallet::stop_mining(const std::vector<std::string>& args)
{
  if (!try_connect_to_daemon())
    return true;

  COMMAND_RPC_STOP_MINING::request req;
  COMMAND_RPC_STOP_MINING::response res;
  bool r = net_utils::invoke_http_json_remote_command2(m_daemon_address + "/stop_mining", req, res, m_http_client);
  std::string err = interpret_rpc_response(r, res.status);
  if (err.empty())
    success_msg_writer() << "Mining stopped in daemon";
  else
    fail_msg_writer() << "mining has NOT been stopped: " << err;
  return true;
}
//----------------------------------------------------------------------------------------------------
bool simple_wallet::save_bc(const std::vector<std::string>& args)
{
  if (!try_connect_to_daemon())
    return true;

  COMMAND_RPC_SAVE_BC::request req;
  COMMAND_RPC_SAVE_BC::response res;
  bool r = net_utils::invoke_http_json_remote_command2(m_daemon_address + "/save_bc", req, res, m_http_client);
  std::string err = interpret_rpc_response(r, res.status);
  if (err.empty())
    success_msg_writer() << "Blockchain saved";
  else
    fail_msg_writer() << "Blockchain can't be saved: " << err;
  return true;
}
//----------------------------------------------------------------------------------------------------
void simple_wallet::on_new_block(uint64_t height, const cryptonote::block& block)
{
  m_refresh_progress_reporter.update(height, false);
}
//----------------------------------------------------------------------------------------------------
void simple_wallet::on_money_received(uint64_t height, const cryptonote::transaction& tx, size_t out_index)
{
  message_writer(epee::log_space::console_color_green, false) <<
    "Height " << height <<
    ", transaction " << get_transaction_hash(tx) <<
    ", received " << print_money(tx.vout[out_index].amount);
  m_refresh_progress_reporter.update(height, true);
}
//----------------------------------------------------------------------------------------------------
void simple_wallet::on_money_spent(uint64_t height, const cryptonote::transaction& in_tx, size_t out_index, const cryptonote::transaction& spend_tx)
{
  message_writer(epee::log_space::console_color_magenta, false) <<
    "Height " << height <<
    ", transaction " << get_transaction_hash(spend_tx) <<
    ", spent " << print_money(in_tx.vout[out_index].amount);
  m_refresh_progress_reporter.update(height, true);
}
//----------------------------------------------------------------------------------------------------
void simple_wallet::on_skip_transaction(uint64_t height, const cryptonote::transaction& tx)
{
  message_writer(epee::log_space::console_color_red, true) <<
    "Height " << height <<
    ", transaction " << get_transaction_hash(tx) <<
    ", unsupported transaction format";
  m_refresh_progress_reporter.update(height, true);
}
//----------------------------------------------------------------------------------------------------
bool simple_wallet::refresh(const std::vector<std::string>& args)
{
  if (!try_connect_to_daemon())
    return true;

  message_writer() << "Starting refresh...";

  size_t fetched_blocks = 0;
  size_t start_height = 0;
  if(!args.empty()){
    try
    {
        start_height = boost::lexical_cast<int>( args[0] );
    }
    catch(const boost::bad_lexical_cast &)
    {
        start_height = 0;
    }
  }
  
  bool ok = false;
  std::ostringstream ss;
  try
  {
    m_wallet->refresh(start_height, fetched_blocks);
    ok = true;
    // Clear line "Height xxx of xxx"
    std::cout << "\r                                                                \r";
    success_msg_writer(true) << "Refresh done, blocks received: " << fetched_blocks;
    show_balance();
  }
  catch (const tools::error::daemon_busy&)
  {
    ss << "daemon is busy. Please try later";
  }
  catch (const tools::error::no_connection_to_daemon&)
  {
    ss << "no connection to daemon. Please, make sure daemon is running";
  }
  catch (const tools::error::wallet_rpc_error& e)
  {
    LOG_ERROR("Unknown RPC error: " << e.to_string());
    ss << "RPC error \"" << e.what() << '"';
  }
  catch (const tools::error::refresh_error& e)
  {
    LOG_ERROR("refresh error: " << e.to_string());
    ss << e.what();
  }
  catch (const tools::error::wallet_internal_error& e)
  {
    LOG_ERROR("internal error: " << e.to_string());
    ss << "internal error: " << e.what();
  }
  catch (const std::exception& e)
  {
    LOG_ERROR("unexpected error: " << e.what());
    ss << "unexpected error: " << e.what();
  }
  catch (...)
  {
    LOG_ERROR("Unknown error");
    ss << "unknown error";
  }

  if (!ok)
  {
    fail_msg_writer() << "refresh failed: " << ss.str() << ". Blocks received: " << fetched_blocks;
  }

  return true;
}
//----------------------------------------------------------------------------------------------------
bool simple_wallet::show_balance(const std::vector<std::string>& args/* = std::vector<std::string>()*/)
{
  success_msg_writer() << "balance: " << print_money(m_wallet->balance()) << ", unlocked balance: " << print_money(m_wallet->unlocked_balance());
  return true;
}
//----------------------------------------------------------------------------------------------------
bool simple_wallet::show_incoming_transfers(const std::vector<std::string>& args)
{
  bool filter = false;
  bool available = false;
  if (!args.empty())
  {
    if (args[0] == "available")
    {
      filter = true;
      available = true;
    }
    else if (args[0] == "unavailable")
    {
      filter = true;
      available = false;
    }
  }

  tools::wallet2::transfer_container transfers;
  m_wallet->get_transfers(transfers);

  bool transfers_found = false;
  for (const auto& td : transfers)
  {
    if (!filter || available != td.m_spent)
    {
      if (!transfers_found)
      {
        message_writer() << "        amount       \tspent\tglobal index\t                              tx id";
        transfers_found = true;
      }
      message_writer(td.m_spent ? epee::log_space::console_color_magenta : epee::log_space::console_color_green, false) <<
        std::setw(21) << print_money(td.amount()) << '\t' <<
        std::setw(3) << (td.m_spent ? 'T' : 'F') << "  \t" <<
        std::setw(12) << td.m_global_output_index << '\t' <<
        get_transaction_hash(td.m_tx);
    }
  }

  if (!transfers_found)
  {
    if (!filter)
    {
      success_msg_writer() << "No incoming transfers";
    }
    else if (available)
    {
      success_msg_writer() << "No incoming available transfers";
    }
    else
    {
      success_msg_writer() << "No incoming unavailable transfers";
    }
  }

  return true;
}
//----------------------------------------------------------------------------------------------------
bool simple_wallet::show_payments(const std::vector<std::string> &args)
{
  if(args.empty())
  {
    fail_msg_writer() << "expected at least one payment_id";
    return true;
  }

  message_writer() << "                            payment                             \t" <<
    "                          transaction                           \t" <<
    "  height\t       amount        \tunlock time";

  bool payments_found = false;
  for(std::string arg : args)
  {
    crypto::hash payment_id;
    if(tools::wallet2::parse_payment_id(arg, payment_id))
    {
      std::list<tools::wallet2::payment_details> payments;
      m_wallet->get_payments(payment_id, payments);
      if(payments.empty())
      {
        success_msg_writer() << "No payments with id " << payment_id;
        continue;
      }

      for (const tools::wallet2::payment_details& pd : payments)
      {
        if(!payments_found)
        {
          payments_found = true;
        }
        success_msg_writer(true) <<
          payment_id << '\t' <<
          pd.m_tx_hash << '\t' <<
          std::setw(8)  << pd.m_block_height << '\t' <<
          std::setw(21) << print_money(pd.m_amount) << '\t' <<
          pd.m_unlock_time;
      }
    }
    else
    {
      fail_msg_writer() << "payment id has invalid format: \"" << arg << "\", expected 64-character string";
    }
  }

  return true;
}
//----------------------------------------------------------------------------------------------------
uint64_t simple_wallet::get_daemon_blockchain_height(std::string& err)
{
  COMMAND_RPC_GET_HEIGHT::request req;
  COMMAND_RPC_GET_HEIGHT::response res = boost::value_initialized<COMMAND_RPC_GET_HEIGHT::response>();
  bool r = net_utils::invoke_http_json_remote_command2(m_daemon_address + "/getheight", req, res, m_http_client);
  err = interpret_rpc_response(r, res.status);
  return res.height;
}
//----------------------------------------------------------------------------------------------------
bool simple_wallet::show_blockchain_height(const std::vector<std::string>& args)
{
  if (!try_connect_to_daemon())
    return true;

  std::string err;
  uint64_t bc_height = get_daemon_blockchain_height(err);
  if (err.empty())
    success_msg_writer() << bc_height;
  else
    fail_msg_writer() << "failed to get blockchain height: " << err;
  return true;
}

//----------------------------------------------------------------------------------------------------
bool simple_wallet::transfer(const std::vector<std::string> &args_)
{
  if (!try_connect_to_daemon())
    return true;

  std::vector<std::string> local_args = args_;
  if(local_args.size() < 3)
  {
    fail_msg_writer() << "wrong number of arguments, expected at least 3, got " << local_args.size();
    return true;
  }

  size_t fake_outs_count;
  if(!epee::string_tools::get_xtype_from_string(fake_outs_count, local_args[0]))
  {
    fail_msg_writer() << "mixin_count should be non-negative integer, got " << local_args[0];
    return true;
  }
  local_args.erase(local_args.begin());

  std::vector<uint8_t> extra;
  if (1 == local_args.size() % 2)
  {
    std::string payment_id_str = local_args.back();
    local_args.pop_back();

    crypto::hash payment_id;
    bool r = tools::wallet2::parse_payment_id(payment_id_str, payment_id);
    if(r)
    {
      std::string extra_nonce;
      set_payment_id_to_tx_extra_nonce(extra_nonce, payment_id);
      r = add_extra_nonce_to_tx_extra(extra, extra_nonce);
    }

    if(!r)
    {
      fail_msg_writer() << "payment id has invalid format: \"" << payment_id_str << "\", expected 64-character string";
      return true;
    }
  }

  vector<cryptonote::tx_destination_entry> dsts;
  for (size_t i = 0; i < local_args.size(); i += 2)
  {
    cryptonote::tx_destination_entry de;
    if(!get_account_address_from_str(de.addr, m_wallet->testnet(), local_args[i]))
    {
      // if treating as an address fails, try as url
      bool dnssec_ok = false;
      std::string url = local_args[i];

      // attempt to get address from dns query
      auto addresses_from_dns = tools::wallet2::addresses_from_url(url, dnssec_ok);

      // for now, move on only if one address found
      if (addresses_from_dns.size() == 1)
      {
        if (get_account_address_from_str(de.addr, m_wallet->testnet(), addresses_from_dns[0]))
        {
          // if it was an address, prompt user for confirmation.
          // inform user of DNSSEC validation status as well.

          std::string dnssec_str;
          if (dnssec_ok)
          {
            dnssec_str = "DNSSEC validation passed";
          }
          else
          {
            dnssec_str = "WARNING: DNSSEC validation was unsuccessful, this address may not be correct!";
          }
          std::stringstream prompt;
          prompt << "For URL: " << url
                 << ", " << dnssec_str << std::endl
                 << " Monero Address = " << addresses_from_dns[0]
                 << std::endl
                 << "Is this OK? (Y/n) "
          ;

          // prompt the user for confirmation given the dns query and dnssec status
          std::string confirm_dns_ok = command_line::input_line(prompt.str());
          if (confirm_dns_ok != "Y" && confirm_dns_ok != "y" && confirm_dns_ok != "Yes" && confirm_dns_ok != "yes")
          {
            fail_msg_writer() << "You have cancelled the transfer request";
            return true;
          }
        }
        else
        {
          fail_msg_writer() << "Failed to get a Monero address from: " << local_args[i];
          return true;
        }
      }
      else if (addresses_from_dns.size() > 1)
      {
        fail_msg_writer() << "Multiple Monero addresses found for given URL: " << url << ", this is not yet supported.";
      }
      else
      {
        fail_msg_writer() << "Wrong address: " << local_args[i];
        return true;
      }
    }

    bool ok = cryptonote::parse_amount(de.amount, local_args[i + 1]);
    if(!ok || 0 == de.amount)
    {
      fail_msg_writer() << "amount is wrong: " << local_args[i] << ' ' << local_args[i + 1] <<
        ", expected number from 0 to " << print_money(std::numeric_limits<uint64_t>::max());
      return true;
    }

    dsts.push_back(de);
  }

  try
  {
    // figure out what tx will be necessary
    auto ptx_vector = m_wallet->create_transactions(dsts, fake_outs_count, 0 /* unlock_time */, 0 /* unused fee arg*/, extra);

    // if more than one tx necessary, prompt user to confirm
    if (ptx_vector.size() > 1)
    {
        std::string prompt_str = "Your transaction needs to be split into ";
        prompt_str += std::to_string(ptx_vector.size());
        prompt_str += " transactions.  This will result in a transaction fee being applied to each transaction";
        prompt_str += ".  Is this okay?  (Y/Yes/N/No)";
        std::string accepted = command_line::input_line(prompt_str);
        if (accepted != "Y" && accepted != "y" && accepted != "Yes" && accepted != "yes")
        {
          fail_msg_writer() << "Transaction cancelled.";

          // would like to return false, because no tx made, but everything else returns true
          // and I don't know what returning false might adversely affect.  *sigh*
          return true; 
        }
    }

    // actually commit the transactions
    while (!ptx_vector.empty())
    {
      auto & ptx = ptx_vector.back();
      m_wallet->commit_tx(ptx);
      success_msg_writer(true) << "Money successfully sent, transaction " << get_transaction_hash(ptx.tx);

      // if no exception, remove element from vector
      ptx_vector.pop_back();
    }
  }
  catch (const tools::error::daemon_busy&)
  {
    fail_msg_writer() << "daemon is busy. Please try later";
  }
  catch (const tools::error::no_connection_to_daemon&)
  {
    fail_msg_writer() << "no connection to daemon. Please, make sure daemon is running.";
  }
  catch (const tools::error::wallet_rpc_error& e)
  {
    LOG_ERROR("Unknown RPC error: " << e.to_string());
    fail_msg_writer() << "RPC error \"" << e.what() << '"';
  }
  catch (const tools::error::get_random_outs_error&)
  {
    fail_msg_writer() << "failed to get random outputs to mix";
  }
  catch (const tools::error::not_enough_money& e)
  {
    fail_msg_writer() << "not enough money to transfer, available only " << print_money(e.available()) <<
      ", transaction amount " << print_money(e.tx_amount() + e.fee()) << " = " << print_money(e.tx_amount()) <<
      " + " << print_money(e.fee()) << " (fee)";
  }
  catch (const tools::error::not_enough_outs_to_mix& e)
  {
    auto writer = fail_msg_writer();
    writer << "not enough outputs for specified mixin_count = " << e.mixin_count() << ":";
    for (const cryptonote::COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::outs_for_amount& outs_for_amount : e.scanty_outs())
    {
      writer << "\noutput amount = " << print_money(outs_for_amount.amount) << ", fount outputs to mix = " << outs_for_amount.outs.size();
    }
  }
  catch (const tools::error::tx_not_constructed&)
  {
    fail_msg_writer() << "transaction was not constructed";
  }
  catch (const tools::error::tx_rejected& e)
  {
    fail_msg_writer() << "transaction " << get_transaction_hash(e.tx()) << " was rejected by daemon with status \"" << e.status() << '"';
  }
  catch (const tools::error::tx_sum_overflow& e)
  {
    fail_msg_writer() << e.what();
  }
  catch (const tools::error::zero_destination&)
  {
    fail_msg_writer() << "one of destinations is zero";
  }
  catch (const tools::error::tx_too_big& e)
  {
    fail_msg_writer() << "Failed to find a suitable way to split transactions";
  }
  catch (const tools::error::transfer_error& e)
  {
    LOG_ERROR("unknown transfer error: " << e.to_string());
    fail_msg_writer() << "unknown transfer error: " << e.what();
  }
  catch (const tools::error::wallet_internal_error& e)
  {
    LOG_ERROR("internal error: " << e.to_string());
    fail_msg_writer() << "internal error: " << e.what();
  }
  catch (const std::exception& e)
  {
    LOG_ERROR("unexpected error: " << e.what());
    fail_msg_writer() << "unexpected error: " << e.what();
  }
  catch (...)
  {
    LOG_ERROR("Unknown error");
    fail_msg_writer() << "unknown error";
  }

  return true;
}
//----------------------------------------------------------------------------------------------------
bool simple_wallet::run()
{
  std::string addr_start = m_wallet->get_account().get_public_address_str(m_wallet->testnet()).substr(0, 6);
  return m_cmd_binder.run_handling("[wallet " + addr_start + "]: ", "");
}
//----------------------------------------------------------------------------------------------------
void simple_wallet::stop()
{
  m_cmd_binder.stop_handling();
  m_wallet->stop();
}
//----------------------------------------------------------------------------------------------------
bool simple_wallet::print_address(const std::vector<std::string> &args/* = std::vector<std::string>()*/)
{
  success_msg_writer() << m_wallet->get_account().get_public_address_str(m_wallet->testnet());
  return true;
}
//----------------------------------------------------------------------------------------------------
bool simple_wallet::process_command(const std::vector<std::string> &args)
{
  return m_cmd_binder.process_command_vec(args);
}
//----------------------------------------------------------------------------------------------------
int main(int argc, char* argv[])
{
#ifdef WIN32
  _CrtSetDbgFlag ( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
#endif

  //TRY_ENTRY();

  string_tools::set_module_name_and_folder(argv[0]);

  po::options_description desc_general("General options");
  command_line::add_arg(desc_general, command_line::arg_help);
  command_line::add_arg(desc_general, command_line::arg_version);

  po::options_description desc_params("Wallet options");
  command_line::add_arg(desc_params, arg_wallet_file);
  command_line::add_arg(desc_params, arg_generate_new_wallet);
  command_line::add_arg(desc_params, arg_password);
  command_line::add_arg(desc_params, arg_daemon_address);
  command_line::add_arg(desc_params, arg_daemon_host);
  command_line::add_arg(desc_params, arg_daemon_port);
  command_line::add_arg(desc_params, arg_command);
  command_line::add_arg(desc_params, arg_log_level);
  command_line::add_arg(desc_params, arg_restore_deterministic_wallet );
  command_line::add_arg(desc_params, arg_non_deterministic );
  command_line::add_arg(desc_params, arg_electrum_seed );
  command_line::add_arg(desc_params, arg_testnet);
  tools::wallet_rpc_server::init_options(desc_params);

  po::positional_options_description positional_options;
  positional_options.add(arg_command.name, -1);

  po::options_description desc_all;
  desc_all.add(desc_general).add(desc_params);
  cryptonote::simple_wallet w;
  po::variables_map vm;
  bool r = command_line::handle_error_helper(desc_all, [&]()
  {
    po::store(command_line::parse_command_line(argc, argv, desc_general, true), vm);

    if (command_line::get_arg(vm, command_line::arg_help))
    {
      success_msg_writer() << CRYPTONOTE_NAME << " wallet v" << MONERO_VERSION_FULL;
      success_msg_writer() << "Usage: simplewallet [--wallet-file=<file>|--generate-new-wallet=<file>] [--daemon-address=<host>:<port>] [<COMMAND>]";
      success_msg_writer() << desc_all << '\n' << w.get_commands_str();
      return false;
    }
    else if (command_line::get_arg(vm, command_line::arg_version))
    {
      success_msg_writer() << CRYPTONOTE_NAME << " wallet v" << MONERO_VERSION_FULL;
      return false;
    }

    auto parser = po::command_line_parser(argc, argv).options(desc_params).positional(positional_options);
    po::store(parser.run(), vm);
    po::notify(vm);
    return true;
  });
  if (!r)
    return 0;

  //set up logging options
  log_space::get_set_log_detalisation_level(true, LOG_LEVEL_2);
  //log_space::log_singletone::add_logger(LOGGER_CONSOLE, NULL, NULL, LOG_LEVEL_0);
  log_space::log_singletone::add_logger(LOGGER_FILE,
    log_space::log_singletone::get_default_log_file().c_str(),
    log_space::log_singletone::get_default_log_folder().c_str(), LOG_LEVEL_4);

  message_writer(epee::log_space::console_color_white, true) << CRYPTONOTE_NAME << " wallet v" << MONERO_VERSION_FULL;

  if(command_line::has_arg(vm, arg_log_level))
  {
    LOG_PRINT_L0("Setting log level = " << command_line::get_arg(vm, arg_log_level));
    log_space::get_set_log_detalisation_level(true, command_line::get_arg(vm, arg_log_level));
  }

  if(command_line::has_arg(vm, tools::wallet_rpc_server::arg_rpc_bind_port))
  {
    log_space::log_singletone::add_logger(LOGGER_CONSOLE, NULL, NULL, LOG_LEVEL_2);
    //runs wallet with rpc interface
    if(!command_line::has_arg(vm, arg_wallet_file) )
    {
      LOG_ERROR("Wallet file not set.");
      return 1;
    }
    if(!command_line::has_arg(vm, arg_daemon_address) )
    {
      LOG_ERROR("Daemon address not set.");
      return 1;
    }
    if(!command_line::has_arg(vm, arg_password) )
    {
      LOG_ERROR("Wallet password not set.");
      return 1;
    }

    bool testnet = command_line::get_arg(vm, arg_testnet);
    std::string wallet_file     = command_line::get_arg(vm, arg_wallet_file);
    std::string wallet_password = command_line::get_arg(vm, arg_password);
    std::string daemon_address  = command_line::get_arg(vm, arg_daemon_address);
    std::string daemon_host = command_line::get_arg(vm, arg_daemon_host);
    int daemon_port = command_line::get_arg(vm, arg_daemon_port);
    if (daemon_host.empty())
      daemon_host = "localhost";
    if (!daemon_port)
      daemon_port = testnet ? config::testnet::RPC_DEFAULT_PORT : config::RPC_DEFAULT_PORT;
    if (daemon_address.empty())
      daemon_address = std::string("http://") + daemon_host + ":" + std::to_string(daemon_port);

    tools::wallet2 wal(testnet);
    try
    {
      LOG_PRINT_L0("Loading wallet...");
      wal.load(wallet_file, wallet_password);
      wal.init(daemon_address);
      wal.refresh();
      LOG_PRINT_GREEN("Loaded ok", LOG_LEVEL_0);
    }
    catch (const std::exception& e)
    {
      LOG_ERROR("Wallet initialize failed: " << e.what());
      return 1;
    }
    tools::wallet_rpc_server wrpc(wal);
    bool r = wrpc.init(vm);
    CHECK_AND_ASSERT_MES(r, 1, "Failed to initialize wallet rpc server");

    tools::signal_handler::install([&wrpc, &wal] {
      wrpc.send_stop_signal();
      wal.store();
    });
    LOG_PRINT_L0("Starting wallet rpc server");
    wrpc.run();
    LOG_PRINT_L0("Stopped wallet rpc server");
    try
    {
      LOG_PRINT_L0("Storing wallet...");
      wal.store();
      LOG_PRINT_GREEN("Stored ok", LOG_LEVEL_0);
    }
    catch (const std::exception& e)
    {
      LOG_ERROR("Failed to store wallet: " << e.what());
      return 1;
    }
  }else
  {
    //runs wallet with console interface
    r = w.init(vm);
    CHECK_AND_ASSERT_MES(r, 1, "Failed to initialize wallet");

    std::vector<std::string> command = command_line::get_arg(vm, arg_command);
    if (!command.empty())
    {
      w.process_command(command);
      w.stop();
      w.deinit();
    }
    else
    {
      tools::signal_handler::install([&w] {
        w.stop();
      });
      w.run();

      w.deinit();
    }
  }
  return 0;
  //CATCH_ENTRY_L0("main", 1);
}