text: // 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.
  //
  // Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
  
  #pragma once
  
  #include <memory>
  
  #include <boost/program_options/options_description.hpp>
  #include <boost/program_options/variables_map.hpp>
  #include <boost/serialization/list.hpp>
  #include <boost/serialization/vector.hpp>
  #include <boost/serialization/deque.hpp>
  #include <atomic>
  
  #include "include_base_utils.h"
  #include "cryptonote_basic/account.h"
  #include "cryptonote_basic/account_boost_serialization.h"
  #include "cryptonote_basic/cryptonote_basic_impl.h"
  #include "net/http_client.h"
  #include "storages/http_abstract_invoke.h"
  #include "rpc/core_rpc_server_commands_defs.h"
  #include "cryptonote_basic/cryptonote_format_utils.h"
  #include "cryptonote_core/cryptonote_tx_utils.h"
  #include "common/unordered_containers_boost_serialization.h"
  #include "crypto/chacha.h"
  #include "crypto/hash.h"
  #include "ringct/rctTypes.h"
  #include "ringct/rctOps.h"
  #include "checkpoints/checkpoints.h"
  
  #include "wallet_errors.h"
  #include "common/password.h"
  #include "node_rpc_proxy.h"
  
  #undef MONERO_DEFAULT_LOG_CATEGORY
  #define MONERO_DEFAULT_LOG_CATEGORY "wallet.wallet2"
  
  class Serialization_portability_wallet_Test;
  
  namespace tools
  {
    class ringdb;
  
    class i_wallet2_callback
    {
    public:
      // Full wallet callbacks
      virtual void on_new_block(uint64_t height, const cryptonote::block& block) {}
      virtual void on_money_received(uint64_t height, const crypto::hash &txid, const cryptonote::transaction& tx, uint64_t amount, const cryptonote::subaddress_index& subaddr_index) {}
      virtual void on_unconfirmed_money_received(uint64_t height, const crypto::hash &txid, const cryptonote::transaction& tx, uint64_t amount, const cryptonote::subaddress_index& subaddr_index) {}
      virtual void on_money_spent(uint64_t height, const crypto::hash &txid, const cryptonote::transaction& in_tx, uint64_t amount, const cryptonote::transaction& spend_tx, const cryptonote::subaddress_index& subaddr_index) {}
      virtual void on_skip_transaction(uint64_t height, const crypto::hash &txid, const cryptonote::transaction& tx) {}
      // Light wallet callbacks
      virtual void on_lw_new_block(uint64_t height) {}
      virtual void on_lw_money_received(uint64_t height, const crypto::hash &txid, uint64_t amount) {}
      virtual void on_lw_unconfirmed_money_received(uint64_t height, const crypto::hash &txid, uint64_t amount) {}
      virtual void on_lw_money_spent(uint64_t height, const crypto::hash &txid, uint64_t amount) {}
      // Common callbacks
      virtual void on_pool_tx_removed(const crypto::hash &txid) {}
      virtual ~i_wallet2_callback() {}
    };
  
    struct tx_dust_policy
    {
      uint64_t dust_threshold;
      bool add_to_fee;
      cryptonote::account_public_address addr_for_dust;
  
      tx_dust_policy(uint64_t a_dust_threshold = 0, bool an_add_to_fee = true, cryptonote::account_public_address an_addr_for_dust = cryptonote::account_public_address())
        : dust_threshold(a_dust_threshold)
        , add_to_fee(an_add_to_fee)
        , addr_for_dust(an_addr_for_dust)
      {
      }
    };
  
    class hashchain
    {
    public:
      hashchain(): m_genesis(crypto::null_hash), m_offset(0) {}
  
      size_t size() const { return m_blockchain.size() + m_offset; }
      size_t offset() const { return m_offset; }
      const crypto::hash &genesis() const { return m_genesis; }
      void push_back(const crypto::hash &hash) { if (m_offset == 0 && m_blockchain.empty()) m_genesis = hash; m_blockchain.push_back(hash); }
      bool is_in_bounds(size_t idx) const { return idx >= m_offset && idx < size(); }
      const crypto::hash &operator[](size_t idx) const { return m_blockchain[idx - m_offset]; }
      crypto::hash &operator[](size_t idx) { return m_blockchain[idx - m_offset]; }
      void crop(size_t height) { m_blockchain.resize(height - m_offset); }
      void clear() { m_offset = 0; m_blockchain.clear(); }
      bool empty() const { return m_blockchain.empty() && m_offset == 0; }
      void trim(size_t height) { while (height > m_offset && m_blockchain.size() > 1) { m_blockchain.pop_front(); ++m_offset; } m_blockchain.shrink_to_fit(); }
      void refill(const crypto::hash &hash) { m_blockchain.push_back(hash); --m_offset; }
  
      template <class t_archive>
      inline void serialize(t_archive &a, const unsigned int ver)
      {
        a & m_offset;
        a & m_genesis;
        a & m_blockchain;
      }
  
    private:
      size_t m_offset;
      crypto::hash m_genesis;
      std::deque<crypto::hash> m_blockchain;
    };
  
    class wallet2
    {
      friend class ::Serialization_portability_wallet_Test;
    public:
      static constexpr const std::chrono::seconds rpc_timeout = std::chrono::minutes(3) + std::chrono::seconds(30);
  
      enum RefreshType {
        RefreshFull,
        RefreshOptimizeCoinbase,
        RefreshNoCoinbase,
        RefreshDefault = RefreshOptimizeCoinbase,
      };
  
      static const char* tr(const char* str);
  
      static bool has_testnet_option(const boost::program_options::variables_map& vm);
      static bool has_stagenet_option(const boost::program_options::variables_map& vm);
      static void init_options(boost::program_options::options_description& desc_params);
  
      //! Uses stdin and stdout. Returns a wallet2 if no errors.
      static std::unique_ptr<wallet2> make_from_json(const boost::program_options::variables_map& vm, const std::string& json_file, const std::function<boost::optional<password_container>(const char *, bool)> &password_prompter);
  
      //! Uses stdin and stdout. Returns a wallet2 and password for `wallet_file` if no errors.
      static std::pair<std::unique_ptr<wallet2>, password_container>
        make_from_file(const boost::program_options::variables_map& vm, const std::string& wallet_file, const std::function<boost::optional<password_container>(const char *, bool)> &password_prompter);
  
      //! Uses stdin and stdout. Returns a wallet2 and password for wallet with no file if no errors.
      static std::pair<std::unique_ptr<wallet2>, password_container> make_new(const boost::program_options::variables_map& vm, const std::function<boost::optional<password_container>(const char *, bool)> &password_prompter);
  
      //! Just parses variables.
      static std::unique_ptr<wallet2> make_dummy(const boost::program_options::variables_map& vm, const std::function<boost::optional<password_container>(const char *, bool)> &password_prompter);
  
      static bool verify_password(const std::string& keys_file_name, const epee::wipeable_string& password, bool no_spend_key, hw::device &hwdev);
  
      wallet2(cryptonote::network_type nettype = cryptonote::MAINNET, bool restricted = false);
      ~wallet2();
  
      struct multisig_info
      {
        struct LR
        {
          rct::key m_L;
          rct::key m_R;
  
          BEGIN_SERIALIZE_OBJECT()
            FIELD(m_L)
            FIELD(m_R)
          END_SERIALIZE()
        };
  
        crypto::public_key m_signer;
        std::vector<LR> m_LR;
        std::vector<crypto::key_image> m_partial_key_images; // one per key the participant has
  
        BEGIN_SERIALIZE_OBJECT()
          FIELD(m_signer)
          FIELD(m_LR)
          FIELD(m_partial_key_images)
        END_SERIALIZE()
      };
  
      struct tx_scan_info_t
      {
        cryptonote::keypair in_ephemeral;
        crypto::key_image ki;
        rct::key mask;
        uint64_t amount;
        uint64_t money_transfered;
        bool error;
        boost::optional<cryptonote::subaddress_receive_info> received;
  
        tx_scan_info_t(): money_transfered(0), error(true) {}
      };
  
      struct transfer_details
      {
        uint64_t m_block_height;
        cryptonote::transaction_prefix m_tx;
        crypto::hash m_txid;
        size_t m_internal_output_index;
        uint64_t m_global_output_index;
        bool m_spent;
        uint64_t m_spent_height;
        crypto::key_image m_key_image; //TODO: key_image stored twice :(
        rct::key m_mask;
        uint64_t m_amount;
        bool m_rct;
        bool m_key_image_known;
        size_t m_pk_index;
        cryptonote::subaddress_index m_subaddr_index;
        bool m_key_image_partial;
        std::vector<rct::key> m_multisig_k;
        std::vector<multisig_info> m_multisig_info; // one per other participant
  
        bool is_rct() const { return m_rct; }
        uint64_t amount() const { return m_amount; }
        const crypto::public_key &get_public_key() const { return boost::get<const cryptonote::txout_to_key>(m_tx.vout[m_internal_output_index].target).key; }
  
        BEGIN_SERIALIZE_OBJECT()
          FIELD(m_block_height)
          FIELD(m_tx)
          FIELD(m_txid)
          FIELD(m_internal_output_index)
          FIELD(m_global_output_index)
          FIELD(m_spent)
          FIELD(m_spent_height)
          FIELD(m_key_image)
          FIELD(m_mask)
          FIELD(m_amount)
          FIELD(m_rct)
          FIELD(m_key_image_known)
          FIELD(m_pk_index)
          FIELD(m_subaddr_index)
          FIELD(m_key_image_partial)
          FIELD(m_multisig_k)
          FIELD(m_multisig_info)
        END_SERIALIZE()
      };
  
      struct payment_details
      {
        crypto::hash m_tx_hash;
        uint64_t m_amount;
        uint64_t m_fee;
        uint64_t m_block_height;
        uint64_t m_unlock_time;
        uint64_t m_timestamp;
        cryptonote::subaddress_index m_subaddr_index;
      };
  
      struct address_tx : payment_details
      {
        bool m_coinbase;
        bool m_mempool;
        bool m_incoming;
      };
  
      struct pool_payment_details
      {
        payment_details m_pd;
        bool m_double_spend_seen;
      };
  
      struct unconfirmed_transfer_details
      {
        cryptonote::transaction_prefix m_tx;
        uint64_t m_amount_in;
        uint64_t m_amount_out;
        uint64_t m_change;
        time_t m_sent_time;
        std::vector<cryptonote::tx_destination_entry> m_dests;
        crypto::hash m_payment_id;
        enum { pending, pending_not_in_pool, failed } m_state;
        uint64_t m_timestamp;
        uint32_t m_subaddr_account;   // subaddress account of your wallet to be used in this transfer
        std::set<uint32_t> m_subaddr_indices;  // set of address indices used as inputs in this transfer
        std::vector<std::pair<crypto::key_image, std::vector<uint64_t>>> m_rings; // relative
      };
  
      struct confirmed_transfer_details
      {
        uint64_t m_amount_in;
        uint64_t m_amount_out;
        uint64_t m_change;
        uint64_t m_block_height;
        std::vector<cryptonote::tx_destination_entry> m_dests;
        crypto::hash m_payment_id;
        uint64_t m_timestamp;
        uint64_t m_unlock_time;
        uint32_t m_subaddr_account;   // subaddress account of your wallet to be used in this transfer
        std::set<uint32_t> m_subaddr_indices;  // set of address indices used as inputs in this transfer
        std::vector<std::pair<crypto::key_image, std::vector<uint64_t>>> m_rings; // relative
  
        confirmed_transfer_details(): m_amount_in(0), m_amount_out(0), m_change((uint64_t)-1), m_block_height(0), m_payment_id(crypto::null_hash), m_timestamp(0), m_unlock_time(0), m_subaddr_account((uint32_t)-1) {}
        confirmed_transfer_details(const unconfirmed_transfer_details &utd, uint64_t height):
          m_amount_in(utd.m_amount_in), m_amount_out(utd.m_amount_out), m_change(utd.m_change), m_block_height(height), m_dests(utd.m_dests), m_payment_id(utd.m_payment_id), m_timestamp(utd.m_timestamp), m_unlock_time(utd.m_tx.unlock_time), m_subaddr_account(utd.m_subaddr_account), m_subaddr_indices(utd.m_subaddr_indices), m_rings(utd.m_rings) {}
      };
  
      struct tx_construction_data
      {
        std::vector<cryptonote::tx_source_entry> sources;
        cryptonote::tx_destination_entry change_dts;
        std::vector<cryptonote::tx_destination_entry> splitted_dsts; // split, includes change
        std::vector<size_t> selected_transfers;
        std::vector<uint8_t> extra;
        uint64_t unlock_time;
        bool use_rct;
        std::vector<cryptonote::tx_destination_entry> dests; // original setup, does not include change
        uint32_t subaddr_account;   // subaddress account of your wallet to be used in this transfer
        std::set<uint32_t> subaddr_indices;  // set of address indices used as inputs in this transfer
  
        BEGIN_SERIALIZE_OBJECT()
          FIELD(sources)
          FIELD(change_dts)
          FIELD(splitted_dsts)
          FIELD(selected_transfers)
          FIELD(extra)
          FIELD(unlock_time)
          FIELD(use_rct)
          FIELD(dests)
          FIELD(subaddr_account)
          FIELD(subaddr_indices)
        END_SERIALIZE()
      };
  
      typedef std::vector<transfer_details> transfer_container;
      typedef std::unordered_multimap<crypto::hash, payment_details> payment_container;
  
      struct multisig_sig
      {
        rct::rctSig sigs;
        crypto::public_key ignore;
        std::unordered_set<rct::key> used_L;
        std::unordered_set<crypto::public_key> signing_keys;
        rct::multisig_out msout;
      };
  
      // The convention for destinations is:
      // dests does not include change
      // splitted_dsts (in construction_data) does
      struct pending_tx
      {
        cryptonote::transaction tx;
        uint64_t dust, fee;
        bool dust_added_to_fee;
        cryptonote::tx_destination_entry change_dts;
        std::vector<size_t> selected_transfers;
        std::string key_images;
        crypto::secret_key tx_key;
        std::vector<crypto::secret_key> additional_tx_keys;
        std::vector<cryptonote::tx_destination_entry> dests;
        std::vector<multisig_sig> multisig_sigs;
  
        tx_construction_data construction_data;
  
        BEGIN_SERIALIZE_OBJECT()
          FIELD(tx)
          FIELD(dust)
          FIELD(fee)
          FIELD(dust_added_to_fee)
          FIELD(change_dts)
          FIELD(selected_transfers)
          FIELD(key_images)
          FIELD(tx_key)
          FIELD(additional_tx_keys)
          FIELD(dests)
          FIELD(construction_data)
          FIELD(multisig_sigs)
        END_SERIALIZE()
      };
  
      // The term "Unsigned tx" is not really a tx since it's not signed yet.
      // It doesnt have tx hash, key and the integrated address is not separated into addr + payment id.
      struct unsigned_tx_set
      {
        std::vector<tx_construction_data> txes;
        wallet2::transfer_container transfers;
      };
  
      struct signed_tx_set
      {
        std::vector<pending_tx> ptx;
        std::vector<crypto::key_image> key_images;
      };
  
      struct multisig_tx_set
      {
        std::vector<pending_tx> m_ptx;
        std::unordered_set<crypto::public_key> m_signers;
  
        BEGIN_SERIALIZE_OBJECT()
          FIELD(m_ptx)
          FIELD(m_signers)
        END_SERIALIZE()
      };
  
      struct keys_file_data
      {
        crypto::chacha_iv iv;
        std::string account_data;
  
        BEGIN_SERIALIZE_OBJECT()
          FIELD(iv)
          FIELD(account_data)
        END_SERIALIZE()
      };
  
      struct cache_file_data
      {
        crypto::chacha_iv iv;
        std::string cache_data;
  
        BEGIN_SERIALIZE_OBJECT()
          FIELD(iv)
          FIELD(cache_data)
        END_SERIALIZE()
      };
  
      // GUI Address book
      struct address_book_row
      {
        cryptonote::account_public_address m_address;
        crypto::hash m_payment_id;
        std::string m_description;
        bool m_is_subaddress;
      };
  
      struct reserve_proof_entry
      {
        crypto::hash txid;
        uint64_t index_in_tx;
        crypto::public_key shared_secret;
        crypto::key_image key_image;
        crypto::signature shared_secret_sig;
        crypto::signature key_image_sig;
      };
  
      typedef std::tuple<uint64_t, crypto::public_key, rct::key> get_outs_entry;
  
      /*!
       * \brief  Generates a wallet or restores one.
       * \param  wallet_              Name of wallet file
       * \param  password             Password of wallet file
       * \param  multisig_data        The multisig restore info and keys
       * \param  create_address_file  Whether to create an address file
       */
      void generate(const std::string& wallet_, const epee::wipeable_string& password,
        const std::string& multisig_data, bool create_address_file = false);
  
      /*!
       * \brief Generates a wallet or restores one.
       * \param  wallet_              Name of wallet file
       * \param  password             Password of wallet file
       * \param  recovery_param       If it is a restore, the recovery key
       * \param  recover              Whether it is a restore
       * \param  two_random           Whether it is a non-deterministic wallet
       * \param  create_address_file  Whether to create an address file
       * \return                      The secret key of the generated wallet
       */
      crypto::secret_key generate(const std::string& wallet, const epee::wipeable_string& password,
        const crypto::secret_key& recovery_param = crypto::secret_key(), bool recover = false,
        bool two_random = false, bool create_address_file = false);
      /*!
       * \brief Creates a wallet from a public address and a spend/view secret key pair.
       * \param  wallet_                 Name of wallet file
       * \param  password                Password of wallet file
       * \param  account_public_address  The account's public address
       * \param  spendkey                spend secret key
       * \param  viewkey                 view secret key
       * \param  create_address_file     Whether to create an address file
       */
      void generate(const std::string& wallet, const epee::wipeable_string& password,
        const cryptonote::account_public_address &account_public_address,
        const crypto::secret_key& spendkey, const crypto::secret_key& viewkey, bool create_address_file = false);
      /*!
       * \brief Creates a watch only wallet from a public address and a view secret key.
       * \param  wallet_                 Name of wallet file
       * \param  password                Password of wallet file
       * \param  account_public_address  The account's public address
       * \param  viewkey                 view secret key
       * \param  create_address_file     Whether to create an address file
       */
      void generate(const std::string& wallet, const epee::wipeable_string& password,
        const cryptonote::account_public_address &account_public_address,
        const crypto::secret_key& viewkey = crypto::secret_key(), bool create_address_file = false);
      /*!
       * \brief Restore a wallet hold by an HW.
       * \param  wallet_        Name of wallet file
       * \param  password       Password of wallet file
       * \param  device_name    name of HW to use
       */
      void restore(const std::string& wallet_, const epee::wipeable_string& password, const std::string &device_name);
  
      /*!
       * \brief Creates a multisig wallet
       * \return empty if done, non empty if we need to send another string
       * to other participants
       */
      std::string make_multisig(const epee::wipeable_string &password,
        const std::vector<std::string> &info,
        uint32_t threshold);
      /*!
       * \brief Creates a multisig wallet
       * \return empty if done, non empty if we need to send another string
       * to other participants
       */
      std::string make_multisig(const epee::wipeable_string &password,
        const std::vector<crypto::secret_key> &view_keys,
        const std::vector<crypto::public_key> &spend_keys,
        uint32_t threshold);
      /*!
       * \brief Finalizes creation of a multisig wallet
       */
      bool finalize_multisig(const epee::wipeable_string &password, const std::vector<std::string> &info);
      /*!
       * \brief Finalizes creation of a multisig wallet
       */
      bool finalize_multisig(const epee::wipeable_string &password, std::unordered_set<crypto::public_key> pkeys, std::vector<crypto::public_key> signers);
      /*!
       * Get a packaged multisig information string
       */
      std::string get_multisig_info() const;
      /*!
       * Verifies and extracts keys from a packaged multisig information string
       */
      static bool verify_multisig_info(const std::string &data, crypto::secret_key &skey, crypto::public_key &pkey);
      /*!
       * Verifies and extracts keys from a packaged multisig information string
       */
      static bool verify_extra_multisig_info(const std::string &data, std::unordered_set<crypto::public_key> &pkeys, crypto::public_key &signer);
      /*!
       * Export multisig info
       * This will generate and remember new k values
       */
      cryptonote::blobdata export_multisig();
      /*!
       * Import a set of multisig info from multisig partners
       * \return the number of inputs which were imported
       */
      size_t import_multisig(std::vector<cryptonote::blobdata> info);
      /*!
       * \brief Rewrites to the wallet file for wallet upgrade (doesn't generate key, assumes it's already there)
       * \param wallet_name Name of wallet file (should exist)
       * \param password    Password for wallet file
       */
      void rewrite(const std::string& wallet_name, const epee::wipeable_string& password);
      void write_watch_only_wallet(const std::string& wallet_name, const epee::wipeable_string& password, std::string &new_keys_filename);
      void load(const std::string& wallet, const epee::wipeable_string& password);
      void store();
      /*!
       * \brief store_to  Stores wallet to another file(s), deleting old ones
       * \param path      Path to the wallet file (keys and address filenames will be generated based on this filename)
       * \param password  Password to protect new wallet (TODO: probably better save the password in the wallet object?)
       */
      void store_to(const std::string &path, const epee::wipeable_string &password);
  
      std::string path() const;
  
      /*!
       * \brief verifies given password is correct for default wallet keys file
       */
      bool verify_password(const epee::wipeable_string& password) const;
      cryptonote::account_base& get_account(){return m_account;}
      const cryptonote::account_base& get_account()const{return m_account;}
  
      void set_refresh_from_block_height(uint64_t height) {m_refresh_from_block_height = height;}
      uint64_t get_refresh_from_block_height() const {return m_refresh_from_block_height;}
  
      void explicit_refresh_from_block_height(bool expl) {m_explicit_refresh_from_block_height = expl;}
      bool explicit_refresh_from_block_height() const {return m_explicit_refresh_from_block_height;}
  
      // upper_transaction_size_limit as defined below is set to
      // approximately 125% of the fixed minimum allowable penalty
      // free block size. TODO: fix this so that it actually takes
      // into account the current median block size rather than
      // the minimum block size.
      bool deinit();
      bool init(std::string daemon_address = "http://localhost:8080",
        boost::optional<epee::net_utils::http::login> daemon_login = boost::none, uint64_t upper_transaction_size_limit = 0, bool ssl = false);
  
      void stop() { m_run.store(false, std::memory_order_relaxed); }
  
      i_wallet2_callback* callback() const { return m_callback; }
      void callback(i_wallet2_callback* callback) { m_callback = callback; }
  
      /*!
       * \brief Checks if deterministic wallet
       */
      bool is_deterministic() const;
      bool get_seed(std::string& electrum_words, const epee::wipeable_string &passphrase = epee::wipeable_string()) const;
  
      /*!
      * \brief Checks if light wallet. A light wallet sends view key to a server where the blockchain is scanned.
      */
      bool light_wallet() const { return m_light_wallet; }
      void set_light_wallet(bool light_wallet) { m_light_wallet = light_wallet; }
      uint64_t get_light_wallet_scanned_block_height() const { return m_light_wallet_scanned_block_height; }
      uint64_t get_light_wallet_blockchain_height() const { return m_light_wallet_blockchain_height; }
  
      /*!
       * \brief Gets the seed language
       */
      const std::string &get_seed_language() const;
      /*!
       * \brief Sets the seed language
       */
      void set_seed_language(const std::string &language);
  
      // Subaddress scheme
      cryptonote::account_public_address get_subaddress(const cryptonote::subaddress_index& index) const;
      cryptonote::account_public_address get_address() const { return get_subaddress({0,0}); }
      crypto::public_key get_subaddress_spend_public_key(const cryptonote::subaddress_index& index) const;
      std::vector<crypto::public_key> get_subaddress_spend_public_keys(uint32_t account, uint32_t begin, uint32_t end) const;
      std::string get_subaddress_as_str(const cryptonote::subaddress_index& index) const;
      std::string get_address_as_str() const { return get_subaddress_as_str({0, 0}); }
      std::string get_integrated_address_as_str(const crypto::hash8& payment_id) const;
      void add_subaddress_account(const std::string& label);
      size_t get_num_subaddress_accounts() const { return m_subaddress_labels.size(); }
      size_t get_num_subaddresses(uint32_t index_major) const { return index_major < m_subaddress_labels.size() ? m_subaddress_labels[index_major].size() : 0; }
      void add_subaddress(uint32_t index_major, const std::string& label); // throws when index is out of bound
      void expand_subaddresses(const cryptonote::subaddress_index& index);
      std::string get_subaddress_label(const cryptonote::subaddress_index& index) const;
      void set_subaddress_label(const cryptonote::subaddress_index &index, const std::string &label);
      void set_subaddress_lookahead(size_t major, size_t minor);
      std::pair<size_t, size_t> get_subaddress_lookahead() const { return {m_subaddress_lookahead_major, m_subaddress_lookahead_minor}; }
      /*!
       * \brief Tells if the wallet file is deprecated.
       */
      bool is_deprecated() const;
      void refresh();
      void refresh(uint64_t start_height, uint64_t & blocks_fetched);
      void refresh(uint64_t start_height, uint64_t & blocks_fetched, bool& received_money);
      bool refresh(uint64_t & blocks_fetched, bool& received_money, bool& ok);
  
      void set_refresh_type(RefreshType refresh_type) { m_refresh_type = refresh_type; }
      RefreshType get_refresh_type() const { return m_refresh_type; }
  
      cryptonote::network_type nettype() const { return m_nettype; }
      bool restricted() const { return m_restricted; }
      bool watch_only() const { return m_watch_only; }
      bool multisig(bool *ready = NULL, uint32_t *threshold = NULL, uint32_t *total = NULL) const;
      bool has_multisig_partial_key_images() const;
      bool get_multisig_seed(std::string& seed, const epee::wipeable_string &passphrase = std::string(), bool raw = true) const;
      bool key_on_device() const { return m_key_on_device; }
  
      // locked & unlocked balance of given or current subaddress account
      uint64_t balance(uint32_t subaddr_index_major) const;
      uint64_t unlocked_balance(uint32_t subaddr_index_major) const;
      // locked & unlocked balance per subaddress of given or current subaddress account
      std::map<uint32_t, uint64_t> balance_per_subaddress(uint32_t subaddr_index_major) const;
      std::map<uint32_t, uint64_t> unlocked_balance_per_subaddress(uint32_t subaddr_index_major) const;
      // all locked & unlocked balances of all subaddress accounts
      uint64_t balance_all() const;
      uint64_t unlocked_balance_all() const;
      template<typename T>
      void transfer(const std::vector<cryptonote::tx_destination_entry>& dsts, const size_t fake_outputs_count, const std::vector<size_t> &unused_transfers_indices, uint64_t unlock_time, uint64_t fee, const std::vector<uint8_t>& extra, T destination_split_strategy, const tx_dust_policy& dust_policy, bool trusted_daemon);
      template<typename T>
      void transfer(const std::vector<cryptonote::tx_destination_entry>& dsts, const size_t fake_outputs_count, const std::vector<size_t> &unused_transfers_indices, uint64_t unlock_time, uint64_t fee, const std::vector<uint8_t>& extra, T destination_split_strategy, const tx_dust_policy& dust_policy, cryptonote::transaction& tx, pending_tx& ptx, bool trusted_daemon);
      void transfer(const std::vector<cryptonote::tx_destination_entry>& dsts, const size_t fake_outputs_count, const std::vector<size_t> &unused_transfers_indices, uint64_t unlock_time, uint64_t fee, const std::vector<uint8_t>& extra, bool trusted_daemon);
      void transfer(const std::vector<cryptonote::tx_destination_entry>& dsts, const size_t fake_outputs_count, const std::vector<size_t> &unused_transfers_indices, uint64_t unlock_time, uint64_t fee, const std::vector<uint8_t>& extra, cryptonote::transaction& tx, pending_tx& ptx, bool trusted_daemon);
      template<typename T>
      void transfer_selected(const std::vector<cryptonote::tx_destination_entry>& dsts, const std::vector<size_t>& selected_transfers, size_t fake_outputs_count,
        std::vector<std::vector<tools::wallet2::get_outs_entry>> &outs,
        uint64_t unlock_time, uint64_t fee, const std::vector<uint8_t>& extra, T destination_split_strategy, const tx_dust_policy& dust_policy, cryptonote::transaction& tx, pending_tx &ptx);
      void transfer_selected_rct(std::vector<cryptonote::tx_destination_entry> dsts, const std::vector<size_t>& selected_transfers, size_t fake_outputs_count,
        std::vector<std::vector<tools::wallet2::get_outs_entry>> &outs,
        uint64_t unlock_time, uint64_t fee, const std::vector<uint8_t>& extra, cryptonote::transaction& tx, pending_tx &ptx, bool bulletproof);
  
      void commit_tx(pending_tx& ptx_vector);
      void commit_tx(std::vector<pending_tx>& ptx_vector);
      bool save_tx(const std::vector<pending_tx>& ptx_vector, const std::string &filename) const;
      std::string save_multisig_tx(multisig_tx_set txs);
      bool save_multisig_tx(const multisig_tx_set &txs, const std::string &filename);
      std::string save_multisig_tx(const std::vector<pending_tx>& ptx_vector);
      bool save_multisig_tx(const std::vector<pending_tx>& ptx_vector, const std::string &filename);
      // load unsigned tx from file and sign it. Takes confirmation callback as argument. Used by the cli wallet
      bool sign_tx(const std::string &unsigned_filename, const std::string &signed_filename, std::vector<wallet2::pending_tx> &ptx, std::function<bool(const unsigned_tx_set&)> accept_func = NULL, bool export_raw = false);
      // sign unsigned tx. Takes unsigned_tx_set as argument. Used by GUI
      bool sign_tx(unsigned_tx_set &exported_txs, const std::string &signed_filename, std::vector<wallet2::pending_tx> &ptx, bool export_raw = false);
      // load unsigned_tx_set from file.
      bool load_unsigned_tx(const std::string &unsigned_filename, unsigned_tx_set &exported_txs) const;
      bool load_tx(const std::string &signed_filename, std::vector<tools::wallet2::pending_tx> &ptx, std::function<bool(const signed_tx_set&)> accept_func = NULL);
      std::vector<pending_tx> create_transactions(std::vector<cryptonote::tx_destination_entry> dsts, const size_t fake_outs_count, const uint64_t unlock_time, uint32_t priority, const std::vector<uint8_t>& extra, bool trusted_daemon);
      std::vector<wallet2::pending_tx> create_transactions_2(std::vector<cryptonote::tx_destination_entry> dsts, const size_t fake_outs_count, const uint64_t unlock_time, uint32_t priority, const std::vector<uint8_t>& extra, uint32_t subaddr_account, std::set<uint32_t> subaddr_indices, bool trusted_daemon);     // pass subaddr_indices by value on purpose
      std::vector<wallet2::pending_tx> create_transactions_all(uint64_t below, const cryptonote::account_public_address &address, bool is_subaddress, const size_t fake_outs_count, const uint64_t unlock_time, uint32_t priority, const std::vector<uint8_t>& extra, uint32_t subaddr_account, std::set<uint32_t> subaddr_indices, bool trusted_daemon);
      std::vector<wallet2::pending_tx> create_transactions_single(const crypto::key_image &ki, const cryptonote::account_public_address &address, bool is_subaddress, const size_t fake_outs_count, const uint64_t unlock_time, uint32_t priority, const std::vector<uint8_t>& extra, bool trusted_daemon);
      std::vector<wallet2::pending_tx> create_transactions_from(const cryptonote::account_public_address &address, bool is_subaddress, std::vector<size_t> unused_transfers_indices, std::vector<size_t> unused_dust_indices, const size_t fake_outs_count, const uint64_t unlock_time, uint32_t priority, const std::vector<uint8_t>& extra, bool trusted_daemon);
      bool load_multisig_tx(cryptonote::blobdata blob, multisig_tx_set &exported_txs, std::function<bool(const multisig_tx_set&)> accept_func = NULL);
      bool load_multisig_tx_from_file(const std::string &filename, multisig_tx_set &exported_txs, std::function<bool(const multisig_tx_set&)> accept_func = NULL);
      bool sign_multisig_tx_from_file(const std::string &filename, std::vector<crypto::hash> &txids, std::function<bool(const multisig_tx_set&)> accept_func);
      bool sign_multisig_tx(multisig_tx_set &exported_txs, std::vector<crypto::hash> &txids);
      bool sign_multisig_tx_to_file(multisig_tx_set &exported_txs, const std::string &filename, std::vector<crypto::hash> &txids);
      std::vector<pending_tx> create_unmixable_sweep_transactions(bool trusted_daemon);
      bool check_connection(uint32_t *version = NULL, uint32_t timeout = 200000);
      void get_transfers(wallet2::transfer_container& incoming_transfers) const;
      void get_payments(const crypto::hash& payment_id, std::list<wallet2::payment_details>& payments, uint64_t min_height = 0, const boost::optional<uint32_t>& subaddr_account = boost::none, const std::set<uint32_t>& subaddr_indices = {}) const;
      void get_payments(std::list<std::pair<crypto::hash,wallet2::payment_details>>& payments, uint64_t min_height, uint64_t max_height = (uint64_t)-1, const boost::optional<uint32_t>& subaddr_account = boost::none, const std::set<uint32_t>& subaddr_indices = {}) const;
      void get_payments_out(std::list<std::pair<crypto::hash,wallet2::confirmed_transfer_details>>& confirmed_payments,
        uint64_t min_height, uint64_t max_height = (uint64_t)-1, const boost::optional<uint32_t>& subaddr_account = boost::none, const std::set<uint32_t>& subaddr_indices = {}) const;
      void get_unconfirmed_payments_out(std::list<std::pair<crypto::hash,wallet2::unconfirmed_transfer_details>>& unconfirmed_payments, const boost::optional<uint32_t>& subaddr_account = boost::none, const std::set<uint32_t>& subaddr_indices = {}) const;
      void get_unconfirmed_payments(std::list<std::pair<crypto::hash,wallet2::pool_payment_details>>& unconfirmed_payments, const boost::optional<uint32_t>& subaddr_account = boost::none, const std::set<uint32_t>& subaddr_indices = {}) const;
  
      uint64_t get_blockchain_current_height() const { return m_local_bc_height; }
      void rescan_spent();
      void rescan_blockchain(bool refresh = true);
      bool is_transfer_unlocked(const transfer_details& td) const;
      bool is_transfer_unlocked(uint64_t unlock_time, uint64_t block_height) const;
      template <class t_archive>
      inline void serialize(t_archive &a, const unsigned int ver)
      {
        uint64_t dummy_refresh_height = 0; // moved to keys file
        if(ver < 5)
          return;
        if (ver < 19)
        {
          std::vector<crypto::hash> blockchain;
          a & blockchain;
          for (const auto &b: blockchain)
          {
            m_blockchain.push_back(b);
          }
        }
        else
        {
          a & m_blockchain;
        }
        a & m_transfers;
        a & m_account_public_address;
        a & m_key_images;
        if(ver < 6)
          return;
        a & m_unconfirmed_txs;
        if(ver < 7)
          return;
        a & m_payments;
        if(ver < 8)
          return;
        a & m_tx_keys;
        if(ver < 9)
          return;
        a & m_confirmed_txs;
        if(ver < 11)
          return;
        a & dummy_refresh_height;
        if(ver < 12)
          return;
        a & m_tx_notes;
        if(ver < 13)
          return;
        if (ver < 17)
        {
          // we're loading an old version, where m_unconfirmed_payments was a std::map
          std::unordered_map<crypto::hash, payment_details> m;
          a & m;
          for (std::unordered_map<crypto::hash, payment_details>::const_iterator i = m.begin(); i != m.end(); ++i)
            m_unconfirmed_payments.insert(std::make_pair(i->first, pool_payment_details{i->second, false}));
        }
        if(ver < 14)
          return;
        if(ver < 15)
        {
          // we're loading an older wallet without a pubkey map, rebuild it
          for (size_t i = 0; i < m_transfers.size(); ++i)
          {
            const transfer_details &td = m_transfers[i];
            const cryptonote::tx_out &out = td.m_tx.vout[td.m_internal_output_index];
            const cryptonote::txout_to_key &o = boost::get<const cryptonote::txout_to_key>(out.target);
            m_pub_keys.emplace(o.key, i);
          }
          return;
        }
        a & m_pub_keys;
        if(ver < 16)
          return;
        a & m_address_book;
        if(ver < 17)
          return;
        if (ver < 22)
        {
          // we're loading an old version, where m_unconfirmed_payments payload was payment_details
          std::unordered_multimap<crypto::hash, payment_details> m;
          a & m;
          for (const auto &i: m)
            m_unconfirmed_payments.insert(std::make_pair(i.first, pool_payment_details{i.second, false}));
        }
        if(ver < 18)
          return;
        a & m_scanned_pool_txs[0];
        a & m_scanned_pool_txs[1];
        if (ver < 20)
          return;
        a & m_subaddresses;
        std::unordered_map<cryptonote::subaddress_index, crypto::public_key> dummy_subaddresses_inv;
        a & dummy_subaddresses_inv;
        a & m_subaddress_labels;
        a & m_additional_tx_keys;
        if(ver < 21)
          return;
        a & m_attributes;
        if(ver < 22)
          return;
        a & m_unconfirmed_payments;
        if(ver < 23)
          return;
        a & m_account_tags;
        if(ver < 24)
          return;
        a & m_ring_history_saved;
      }
  
      /*!
       * \brief  Check if wallet keys and bin files exist
       * \param  file_path           Wallet file path
       * \param  keys_file_exists    Whether keys file exists
       * \param  wallet_file_exists  Whether bin file exists
       */
      static void wallet_exists(const std::string& file_path, bool& keys_file_exists, bool& wallet_file_exists);
      /*!
       * \brief  Check if wallet file path is valid format
       * \param  file_path      Wallet file path
       * \return                Whether path is valid format
       */
      static bool wallet_valid_path_format(const std::string& file_path);
      static bool parse_long_payment_id(const std::string& payment_id_str, crypto::hash& payment_id);
      static bool parse_short_payment_id(const std::string& payment_id_str, crypto::hash8& payment_id);
      static bool parse_payment_id(const std::string& payment_id_str, crypto::hash& payment_id);
  
      bool always_confirm_transfers() const { return m_always_confirm_transfers; }
      void always_confirm_transfers(bool always) { m_always_confirm_transfers = always; }
      bool print_ring_members() const { return m_print_ring_members; }
      void print_ring_members(bool value) { m_print_ring_members = value; }
      bool store_tx_info() const { return m_store_tx_info; }
      void store_tx_info(bool store) { m_store_tx_info = store; }
      uint32_t default_mixin() const { return m_default_mixin; }
      void default_mixin(uint32_t m) { m_default_mixin = m; }
      uint32_t get_default_priority() const { return m_default_priority; }
      void set_default_priority(uint32_t p) { m_default_priority = p; }
      bool auto_refresh() const { return m_auto_refresh; }
      void auto_refresh(bool r) { m_auto_refresh = r; }
      bool confirm_missing_payment_id() const { return m_confirm_missing_payment_id; }
      void confirm_missing_payment_id(bool always) { m_confirm_missing_payment_id = always; }
      bool ask_password() const { return m_ask_password; }
      void ask_password(bool always) { m_ask_password = always; }
      void set_min_output_count(uint32_t count) { m_min_output_count = count; }
      uint32_t get_min_output_count() const { return m_min_output_count; }
      void set_min_output_value(uint64_t value) { m_min_output_value = value; }
      uint64_t get_min_output_value() const { return m_min_output_value; }
      void merge_destinations(bool merge) { m_merge_destinations = merge; }
      bool merge_destinations() const { return m_merge_destinations; }
      bool confirm_backlog() const { return m_confirm_backlog; }
      void confirm_backlog(bool always) { m_confirm_backlog = always; }
      void set_confirm_backlog_threshold(uint32_t threshold) { m_confirm_backlog_threshold = threshold; };
      uint32_t get_confirm_backlog_threshold() const { return m_confirm_backlog_threshold; };
      bool confirm_export_overwrite() const { return m_confirm_export_overwrite; }
      void confirm_export_overwrite(bool always) { m_confirm_export_overwrite = always; }
      bool auto_low_priority() const { return m_auto_low_priority; }
      void auto_low_priority(bool value) { m_auto_low_priority = value; }
      bool segregate_pre_fork_outputs() const { return m_segregate_pre_fork_outputs; }
      void segregate_pre_fork_outputs(bool value) { m_segregate_pre_fork_outputs = value; }
      bool key_reuse_mitigation2() const { return m_key_reuse_mitigation2; }
      void key_reuse_mitigation2(bool value) { m_key_reuse_mitigation2 = value; }
      uint64_t segregation_height() const { return m_segregation_height; }
      void segregation_height(uint64_t height) { m_segregation_height = height; }
      bool confirm_non_default_ring_size() const { return m_confirm_non_default_ring_size; }
      void confirm_non_default_ring_size(bool always) { m_confirm_non_default_ring_size = always; }
  
      bool get_tx_key(const crypto::hash &txid, crypto::secret_key &tx_key, std::vector<crypto::secret_key> &additional_tx_keys) const;
      void check_tx_key(const crypto::hash &txid, const crypto::secret_key &tx_key, const std::vector<crypto::secret_key> &additional_tx_keys, const cryptonote::account_public_address &address, uint64_t &received, bool &in_pool, uint64_t &confirmations);
      void check_tx_key_helper(const crypto::hash &txid, const crypto::key_derivation &derivation, const std::vector<crypto::key_derivation> &additional_derivations, const cryptonote::account_public_address &address, uint64_t &received, bool &in_pool, uint64_t &confirmations);
      std::string get_tx_proof(const crypto::hash &txid, const cryptonote::account_public_address &address, bool is_subaddress, const std::string &message);
      bool check_tx_proof(const crypto::hash &txid, const cryptonote::account_public_address &address, bool is_subaddress, const std::string &message, const std::string &sig_str, uint64_t &received, bool &in_pool, uint64_t &confirmations);
  
      std::string get_spend_proof(const crypto::hash &txid, const std::string &message);
      bool check_spend_proof(const crypto::hash &txid, const std::string &message, const std::string &sig_str);
  
      /*!
       * \brief  Generates a proof that proves the reserve of unspent funds
       * \param  account_minreserve       When specified, collect outputs only belonging to the given account and prove the smallest reserve above the given amount
       *                                  When unspecified, proves for all unspent outputs across all accounts
       * \param  message                  Arbitrary challenge message to be signed together
       * \return                          Signature string
       */
      std::string get_reserve_proof(const boost::optional<std::pair<uint32_t, uint64_t>> &account_minreserve, const std::string &message);
      /*!
       * \brief  Verifies a proof of reserve
       * \param  address                  The signer's address
       * \param  message                  Challenge message used for signing
       * \param  sig_str                  Signature string
       * \param  total                    [OUT] the sum of funds included in the signature
       * \param  spent                    [OUT] the sum of spent funds included in the signature
       * \return                          true if the signature verifies correctly
       */
      bool check_reserve_proof(const cryptonote::account_public_address &address, const std::string &message, const std::string &sig_str, uint64_t &total, uint64_t &spent);
  
     /*!
      * \brief GUI Address book get/store
      */
      std::vector<address_book_row> get_address_book() const { return m_address_book; }
      bool add_address_book_row(const cryptonote::account_public_address &address, const crypto::hash &payment_id, const std::string &description, bool is_subaddress);
      bool delete_address_book_row(std::size_t row_id);
  
      uint64_t get_num_rct_outputs();
      size_t get_num_transfer_details() const { return m_transfers.size(); }
      const transfer_details &get_transfer_details(size_t idx) const;
  
      void get_hard_fork_info(uint8_t version, uint64_t &earliest_height) const;
      bool use_fork_rules(uint8_t version, int64_t early_blocks = 0) const;
      int get_fee_algorithm() const;
  
      std::string get_wallet_file() const;
      std::string get_keys_file() const;
      std::string get_daemon_address() const;
      const boost::optional<epee::net_utils::http::login>& get_daemon_login() const { return m_daemon_login; }
      uint64_t get_daemon_blockchain_height(std::string& err) const;
      uint64_t get_daemon_blockchain_target_height(std::string& err);
     /*!
      * \brief Calculates the approximate blockchain height from current date/time.
      */
      uint64_t get_approximate_blockchain_height() const;
      uint64_t estimate_blockchain_height();
      std::vector<size_t> select_available_outputs_from_histogram(uint64_t count, bool atleast, bool unlocked, bool allow_rct, bool trusted_daemon);
      std::vector<size_t> select_available_outputs(const std::function<bool(const transfer_details &td)> &f) const;
      std::vector<size_t> select_available_unmixable_outputs(bool trusted_daemon);
      std::vector<size_t> select_available_mixable_outputs(bool trusted_daemon);
  
      size_t pop_best_value_from(const transfer_container &transfers, std::vector<size_t> &unused_dust_indices, const std::vector<size_t>& selected_transfers, bool smallest = false) const;
      size_t pop_best_value(std::vector<size_t> &unused_dust_indices, const std::vector<size_t>& selected_transfers, bool smallest = false) const;
  
      void set_tx_note(const crypto::hash &txid, const std::string &note);
      std::string get_tx_note(const crypto::hash &txid) const;
  
      void set_description(const std::string &description);
      std::string get_description() const;
  
      /*!
       * \brief  Get the list of registered account tags.
       * \return first.Key=(tag's name), first.Value=(tag's label), second[i]=(i-th account's tag)
       */
      const std::pair<std::map<std::string, std::string>, std::vector<std::string>>& get_account_tags();
      /*!
       * \brief  Set a tag to the given accounts.
       * \param  account_indices  Indices of accounts.
       * \param  tag              Tag's name. If empty, the accounts become untagged.
       */
      void set_account_tag(const std::set<uint32_t> account_indices, const std::string& tag);
      /*!
       * \brief  Set the label of the given tag.
       * \param  tag            Tag's name (which must be non-empty).
       * \param  description    Tag's description.
       */
      void set_account_tag_description(const std::string& tag, const std::string& description);
  
      std::string sign(const std::string &data) const;
      bool verify(const std::string &data, const cryptonote::account_public_address &address, const std::string &signature) const;
  
      // Import/Export wallet data
      std::vector<tools::wallet2::transfer_details> export_outputs() const;
      size_t import_outputs(const std::vector<tools::wallet2::transfer_details> &outputs);
      payment_container export_payments() const;
      void import_payments(const payment_container &payments);
      void import_payments_out(const std::list<std::pair<crypto::hash,wallet2::confirmed_transfer_details>> &confirmed_payments);
      std::tuple<size_t, crypto::hash, std::vector<crypto::hash>> export_blockchain() const;
      void import_blockchain(const std::tuple<size_t, crypto::hash, std::vector<crypto::hash>> &bc);
      bool export_key_images(const std::string &filename) const;
      std::vector<std::pair<crypto::key_image, crypto::signature>> export_key_images() const;
      uint64_t import_key_images(const std::vector<std::pair<crypto::key_image, crypto::signature>> &signed_key_images, uint64_t &spent, uint64_t &unspent, bool check_spent = true);
      uint64_t import_key_images(const std::string &filename, uint64_t &spent, uint64_t &unspent);
  
      void update_pool_state(bool refreshed = false);
      void remove_obsolete_pool_txs(const std::vector<crypto::hash> &tx_hashes);
  
      std::string encrypt(const std::string &plaintext, const crypto::secret_key &skey, bool authenticated = true) const;
      std::string encrypt_with_view_secret_key(const std::string &plaintext, bool authenticated = true) const;
      std::string decrypt(const std::string &ciphertext, const crypto::secret_key &skey, bool authenticated = true) const;
      std::string decrypt_with_view_secret_key(const std::string &ciphertext, bool authenticated = true) const;
  
      std::string make_uri(const std::string &address, const std::string &payment_id, uint64_t amount, const std::string &tx_description, const std::string &recipient_name, std::string &error) const;
      bool parse_uri(const std::string &uri, std::string &address, std::string &payment_id, uint64_t &amount, std::string &tx_description, std::string &recipient_name, std::vector<std::string> &unknown_parameters, std::string &error);
  
      uint64_t get_blockchain_height_by_date(uint16_t year, uint8_t month, uint8_t day);    // 1<=month<=12, 1<=day<=31
  
      bool is_synced() const;
  
      std::vector<std::pair<uint64_t, uint64_t>> estimate_backlog(const std::vector<std::pair<double, double>> &fee_levels);
      std::vector<std::pair<uint64_t, uint64_t>> estimate_backlog(uint64_t min_blob_size, uint64_t max_blob_size, const std::vector<uint64_t> &fees);
  
      uint64_t get_fee_multiplier(uint32_t priority, int fee_algorithm = -1) const;
      uint64_t get_per_kb_fee() const;
      uint64_t adjust_mixin(uint64_t mixin) const;
      uint32_t adjust_priority(uint32_t priority);
  
      // Light wallet specific functions
      // fetch unspent outs from lw node and store in m_transfers
      void light_wallet_get_unspent_outs();
      // fetch txs and store in m_payments
      void light_wallet_get_address_txs();
      // get_address_info
      bool light_wallet_get_address_info(cryptonote::COMMAND_RPC_GET_ADDRESS_INFO::response &response);
      // Login. new_address is true if address hasn't been used on lw node before.
      bool light_wallet_login(bool &new_address);
      // Send an import request to lw node. returns info about import fee, address and payment_id
      bool light_wallet_import_wallet_request(cryptonote::COMMAND_RPC_IMPORT_WALLET_REQUEST::response &response);
      // get random outputs from light wallet server
      void light_wallet_get_outs(std::vector<std::vector<get_outs_entry>> &outs, const std::vector<size_t> &selected_transfers, size_t fake_outputs_count);
      // Parse rct string
      bool light_wallet_parse_rct_str(const std::string& rct_string, const crypto::public_key& tx_pub_key, uint64_t internal_output_index, rct::key& decrypted_mask, rct::key& rct_commit, bool decrypt) const;
      // check if key image is ours
      bool light_wallet_key_image_is_ours(const crypto::key_image& key_image, const crypto::public_key& tx_public_key, uint64_t out_index);
  
      /*
       * "attributes" are a mechanism to store an arbitrary number of string values
       * on the level of the wallet as a whole, identified by keys. Their introduction,
       * technically the unordered map m_attributes stored as part of a wallet file,
       * led to a new wallet file version, but now new singular pieces of info may be added
       * without the need for a new version.
       *
       * The first and so far only value stored as such an attribute is the description.
       * It's stored under the standard key ATTRIBUTE_DESCRIPTION (see method set_description).
       *
       * The mechanism is open to all clients and allows them to use it for storing basically any
       * single string values in a wallet. To avoid the problem that different clients possibly
       * overwrite or misunderstand each other's attributes, a two-part key scheme is
       * proposed: <client name>.<value name>
       */
      const char* const ATTRIBUTE_DESCRIPTION = "wallet2.description";
      void set_attribute(const std::string &key, const std::string &value);
      std::string get_attribute(const std::string &key) const;
  
      crypto::public_key get_multisig_signer_public_key(const crypto::secret_key &spend_skey) const;
      crypto::public_key get_multisig_signer_public_key() const;
      crypto::public_key get_multisig_signing_public_key(size_t idx) const;
      crypto::public_key get_multisig_signing_public_key(const crypto::secret_key &skey) const;
  
      template<class t_request, class t_response>
      inline bool invoke_http_json(const boost::string_ref uri, const t_request& req, t_response& res, std::chrono::milliseconds timeout = std::chrono::seconds(15), const boost::string_ref http_method = "GET")
      {
        boost::lock_guard<boost::mutex> lock(m_daemon_rpc_mutex);
        return epee::net_utils::invoke_http_json(uri, req, res, m_http_client, timeout, http_method);
      }
      template<class t_request, class t_response>
      inline bool invoke_http_bin(const boost::string_ref uri, const t_request& req, t_response& res, std::chrono::milliseconds timeout = std::chrono::seconds(15), const boost::string_ref http_method = "GET")
      {
        boost::lock_guard<boost::mutex> lock(m_daemon_rpc_mutex);
        return epee::net_utils::invoke_http_bin(uri, req, res, m_http_client, timeout, http_method);
      }
      template<class t_request, class t_response>
      inline bool invoke_http_json_rpc(const boost::string_ref uri, const std::string& method_name, const t_request& req, t_response& res, std::chrono::milliseconds timeout = std::chrono::seconds(15), const boost::string_ref http_method = "GET", const std::string& req_id = "0")
      {
        boost::lock_guard<boost::mutex> lock(m_daemon_rpc_mutex);
        return epee::net_utils::invoke_http_json_rpc(uri, method_name, req, res, m_http_client, timeout, http_method, req_id);
      }
  
      bool set_ring_database(const std::string &filename);
      const std::string get_ring_database() const { return m_ring_database; }
      bool get_ring(const crypto::key_image &key_image, std::vector<uint64_t> &outs);
      bool get_rings(const crypto::hash &txid, std::vector<std::pair<crypto::key_image, std::vector<uint64_t>>> &outs);
      bool set_ring(const crypto::key_image &key_image, const std::vector<uint64_t> &outs, bool relative);
      bool find_and_save_rings(bool force = true);
  
      bool blackball_output(const crypto::public_key &output);
      bool set_blackballed_outputs(const std::vector<crypto::public_key> &outputs, bool add = false);
      bool unblackball_output(const crypto::public_key &output);
      bool is_output_blackballed(const crypto::public_key &output) const;
  
    private:
      /*!
       * \brief  Stores wallet information to wallet file.
       * \param  keys_file_name Name of wallet file
       * \param  password       Password of wallet file
       * \param  watch_only     true to save only view key, false to save both spend and view keys
       * \return                Whether it was successful.
       */
      bool store_keys(const std::string& keys_file_name, const epee::wipeable_string& password, bool watch_only = false);
      /*!
       * \brief Load wallet information from wallet file.
       * \param keys_file_name Name of wallet file
       * \param password       Password of wallet file
       */
      bool load_keys(const std::string& keys_file_name, const epee::wipeable_string& password);
      void process_new_transaction(const crypto::hash &txid, const cryptonote::transaction& tx, const std::vector<uint64_t> &o_indices, uint64_t height, uint64_t ts, bool miner_tx, bool pool, bool double_spend_seen);
      void process_new_blockchain_entry(const cryptonote::block& b, const cryptonote::block_complete_entry& bche, const crypto::hash& bl_id, uint64_t height, const cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices &o_indices);
      void detach_blockchain(uint64_t height);
      void get_short_chain_history(std::list<crypto::hash>& ids) const;
      bool is_tx_spendtime_unlocked(uint64_t unlock_time, uint64_t block_height) const;
      bool clear();
      void pull_blocks(uint64_t start_height, uint64_t& blocks_start_height, const std::list<crypto::hash> &short_chain_history, std::list<cryptonote::block_complete_entry> &blocks, std::vector<cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices> &o_indices);
      void pull_hashes(uint64_t start_height, uint64_t& blocks_start_height, const std::list<crypto::hash> &short_chain_history, std::list<crypto::hash> &hashes);
      void fast_refresh(uint64_t stop_height, uint64_t &blocks_start_height, std::list<crypto::hash> &short_chain_history);
      void pull_next_blocks(uint64_t start_height, uint64_t &blocks_start_height, std::list<crypto::hash> &short_chain_history, const std::list<cryptonote::block_complete_entry> &prev_blocks, std::list<cryptonote::block_complete_entry> &blocks, std::vector<cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices> &o_indices, bool &error);
      void process_blocks(uint64_t start_height, const std::list<cryptonote::block_complete_entry> &blocks, const std::vector<cryptonote::COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices> &o_indices, uint64_t& blocks_added);
      uint64_t select_transfers(uint64_t needed_money, std::vector<size_t> unused_transfers_indices, std::vector<size_t>& selected_transfers, bool trusted_daemon) const;
      bool prepare_file_names(const std::string& file_path);
      void process_unconfirmed(const crypto::hash &txid, const cryptonote::transaction& tx, uint64_t height);
      void process_outgoing(const crypto::hash &txid, const cryptonote::transaction& tx, uint64_t height, uint64_t ts, uint64_t spent, uint64_t received, uint32_t subaddr_account, const std::set<uint32_t>& subaddr_indices);
      void add_unconfirmed_tx(const cryptonote::transaction& tx, uint64_t amount_in, const std::vector<cryptonote::tx_destination_entry> &dests, const crypto::hash &payment_id, uint64_t change_amount, uint32_t subaddr_account, const std::set<uint32_t>& subaddr_indices);
      void generate_genesis(cryptonote::block& b) const;
      void check_genesis(const crypto::hash& genesis_hash) const; //throws
      bool generate_chacha_key_from_secret_keys(crypto::chacha_key &key) const;
      crypto::hash get_payment_id(const pending_tx &ptx) const;
      void check_acc_out_precomp(const cryptonote::tx_out &o, const crypto::key_derivation &derivation, const std::vector<crypto::key_derivation> &additional_derivations, size_t i, tx_scan_info_t &tx_scan_info) const;
      void check_acc_out_precomp_once(const cryptonote::tx_out &o, const crypto::key_derivation &derivation, const std::vector<crypto::key_derivation> &additional_derivations, size_t i, tx_scan_info_t &tx_scan_info, bool &already_seen) const;
      void parse_block_round(const cryptonote::blobdata &blob, cryptonote::block &bl, crypto::hash &bl_id, bool &error) const;
      uint64_t get_upper_transaction_size_limit() const;
      std::vector<uint64_t> get_unspent_amounts_vector() const;
      uint64_t get_dynamic_per_kb_fee_estimate() const;
      float get_output_relatedness(const transfer_details &td0, const transfer_details &td1) const;
      std::vector<size_t> pick_preferred_rct_inputs(uint64_t needed_money, uint32_t subaddr_account, const std::set<uint32_t> &subaddr_indices) const;
      void set_spent(size_t idx, uint64_t height);
      void set_unspent(size_t idx);
      void get_outs(std::vector<std::vector<get_outs_entry>> &outs, const std::vector<size_t> &selected_transfers, size_t fake_outputs_count);
      bool tx_add_fake_output(std::vector<std::vector<tools::wallet2::get_outs_entry>> &outs, uint64_t global_index, const crypto::public_key& tx_public_key, const rct::key& mask, uint64_t real_index, bool unlocked) const;
      crypto::public_key get_tx_pub_key_from_received_outs(const tools::wallet2::transfer_details &td) const;
      bool should_pick_a_second_output(bool use_rct, size_t n_transfers, const std::vector<size_t> &unused_transfers_indices, const std::vector<size_t> &unused_dust_indices) const;
      std::vector<size_t> get_only_rct(const std::vector<size_t> &unused_dust_indices, const std::vector<size_t> &unused_transfers_indices) const;
      void scan_output(const cryptonote::transaction &tx, const crypto::public_key &tx_pub_key, size_t i, tx_scan_info_t &tx_scan_info, int &num_vouts_received, std::unordered_map<cryptonote::subaddress_index, uint64_t> &tx_money_got_in_outs, std::vector<size_t> &outs) const;
      void trim_hashchain();
      crypto::key_image get_multisig_composite_key_image(size_t n) const;
      rct::multisig_kLRki get_multisig_composite_kLRki(size_t n, const crypto::public_key &ignore, std::unordered_set<rct::key> &used_L, std::unordered_set<rct::key> &new_used_L) const;
      rct::multisig_kLRki get_multisig_kLRki(size_t n, const rct::key &k) const;
      rct::key get_multisig_k(size_t idx, const std::unordered_set<rct::key> &used_L) const;
      void update_multisig_rescan_info(const std::vector<std::vector<rct::key>> &multisig_k, const std::vector<std::vector<tools::wallet2::multisig_info>> &info, size_t n);
      bool add_rings(const crypto::chacha_key &key, const cryptonote::transaction_prefix &tx);
      bool add_rings(const cryptonote::transaction_prefix &tx);
      bool remove_rings(const cryptonote::transaction_prefix &tx);
      bool get_ring(const crypto::chacha_key &key, const crypto::key_image &key_image, std::vector<uint64_t> &outs);
  
      bool get_output_distribution(uint64_t &start_height, std::vector<uint64_t> &distribution);
  
      uint64_t get_segregation_fork_height() const;
  
      cryptonote::account_base m_account;
      boost::optional<epee::net_utils::http::login> m_daemon_login;
      std::string m_daemon_address;
      std::string m_wallet_file;
      std::string m_keys_file;
      epee::net_utils::http::http_simple_client m_http_client;
      hashchain m_blockchain;
      std::atomic<uint64_t> m_local_bc_height; //temporary workaround
      std::unordered_map<crypto::hash, unconfirmed_transfer_details> m_unconfirmed_txs;
      std::unordered_map<crypto::hash, confirmed_transfer_details> m_confirmed_txs;
      std::unordered_multimap<crypto::hash, pool_payment_details> m_unconfirmed_payments;
      std::unordered_map<crypto::hash, crypto::secret_key> m_tx_keys;
      cryptonote::checkpoints m_checkpoints;
      std::unordered_map<crypto::hash, std::vector<crypto::secret_key>> m_additional_tx_keys;
  
      transfer_container m_transfers;
      payment_container m_payments;
      std::unordered_map<crypto::key_image, size_t> m_key_images;
      std::unordered_map<crypto::public_key, size_t> m_pub_keys;
      cryptonote::account_public_address m_account_public_address;
      std::unordered_map<crypto::public_key, cryptonote::subaddress_index> m_subaddresses;
      std::vector<std::vector<std::string>> m_subaddress_labels;
      std::unordered_map<crypto::hash, std::string> m_tx_notes;
      std::unordered_map<std::string, std::string> m_attributes;
      std::vector<tools::wallet2::address_book_row> m_address_book;
      std::pair<std::map<std::string, std::string>, std::vector<std::string>> m_account_tags;
      uint64_t m_upper_transaction_size_limit; //TODO: auto-calc this value or request from daemon, now use some fixed value
      const std::vector<std::vector<tools::wallet2::multisig_info>> *m_multisig_rescan_info;
      const std::vector<std::vector<rct::key>> *m_multisig_rescan_k;
  
      std::atomic<bool> m_run;
  
      boost::mutex m_daemon_rpc_mutex;
  
      i_wallet2_callback* m_callback;
      bool m_key_on_device;
      cryptonote::network_type m_nettype;
      bool m_restricted;
      std::string seed_language; /*!< Language of the mnemonics (seed). */
      bool is_old_file_format; /*!< Whether the wallet file is of an old file format */
      bool m_watch_only; /*!< no spend key */
      bool m_multisig; /*!< if > 1 spend secret key will not match spend public key */
      uint32_t m_multisig_threshold;
      std::vector<crypto::public_key> m_multisig_signers;
      bool m_always_confirm_transfers;
      bool m_print_ring_members;
      bool m_store_tx_info; /*!< request txkey to be returned in RPC, and store in the wallet cache file */
      uint32_t m_default_mixin;
      uint32_t m_default_priority;
      RefreshType m_refresh_type;
      bool m_auto_refresh;
      uint64_t m_refresh_from_block_height;
      // If m_refresh_from_block_height is explicitly set to zero we need this to differentiate it from the case that
      // m_refresh_from_block_height was defaulted to zero.*/
      bool m_explicit_refresh_from_block_height;
      bool m_confirm_missing_payment_id;
      bool m_confirm_non_default_ring_size;
      bool m_ask_password;
      uint32_t m_min_output_count;
      uint64_t m_min_output_value;
      bool m_merge_destinations;
      bool m_confirm_backlog;
      uint32_t m_confirm_backlog_threshold;
      bool m_confirm_export_overwrite;
      bool m_auto_low_priority;
      bool m_segregate_pre_fork_outputs;
      bool m_key_reuse_mitigation2;
      uint64_t m_segregation_height;
      bool m_is_initialized;
      NodeRPCProxy m_node_rpc_proxy;
      std::unordered_set<crypto::hash> m_scanned_pool_txs[2];
      size_t m_subaddress_lookahead_major, m_subaddress_lookahead_minor;
  
      // Light wallet
      bool m_light_wallet; /* sends view key to daemon for scanning */
      uint64_t m_light_wallet_scanned_block_height;
      uint64_t m_light_wallet_blockchain_height;
      uint64_t m_light_wallet_per_kb_fee = FEE_PER_KB;
      bool m_light_wallet_connected;
      uint64_t m_light_wallet_balance;
      uint64_t m_light_wallet_unlocked_balance;
      // Light wallet info needed to populate m_payment requires 2 separate api calls (get_address_txs and get_unspent_outs)
      // We save the info from the first call in m_light_wallet_address_txs for easier lookup.
      std::unordered_map<crypto::hash, address_tx> m_light_wallet_address_txs;
      // store calculated key image for faster lookup
      std::unordered_map<crypto::public_key, std::map<uint64_t, crypto::key_image> > m_key_image_cache;
  
      std::string m_ring_database;
      bool m_ring_history_saved;
      std::unique_ptr<ringdb> m_ringdb;
    };
  }
  BOOST_CLASS_VERSION(tools::wallet2, 24)
  BOOST_CLASS_VERSION(tools::wallet2::transfer_details, 9)
  BOOST_CLASS_VERSION(tools::wallet2::multisig_info, 1)
  BOOST_CLASS_VERSION(tools::wallet2::multisig_info::LR, 0)
  BOOST_CLASS_VERSION(tools::wallet2::multisig_tx_set, 1)
  BOOST_CLASS_VERSION(tools::wallet2::payment_details, 3)
  BOOST_CLASS_VERSION(tools::wallet2::pool_payment_details, 1)
  BOOST_CLASS_VERSION(tools::wallet2::unconfirmed_transfer_details, 8)
  BOOST_CLASS_VERSION(tools::wallet2::confirmed_transfer_details, 6)
  BOOST_CLASS_VERSION(tools::wallet2::address_book_row, 17)
  BOOST_CLASS_VERSION(tools::wallet2::reserve_proof_entry, 0)
  BOOST_CLASS_VERSION(tools::wallet2::unsigned_tx_set, 0)
  BOOST_CLASS_VERSION(tools::wallet2::signed_tx_set, 0)
  BOOST_CLASS_VERSION(tools::wallet2::tx_construction_data, 2)
  BOOST_CLASS_VERSION(tools::wallet2::pending_tx, 3)
  BOOST_CLASS_VERSION(tools::wallet2::multisig_sig, 0)
  
  namespace boost
  {
    namespace serialization
    {
      template <class Archive>
      inline typename std::enable_if<!Archive::is_loading::value, void>::type initialize_transfer_details(Archive &a, tools::wallet2::transfer_details &x, const boost::serialization::version_type ver)
      {
      }
      template <class Archive>
      inline typename std::enable_if<Archive::is_loading::value, void>::type initialize_transfer_details(Archive &a, tools::wallet2::transfer_details &x, const boost::serialization::version_type ver)
      {
          if (ver < 1)
          {
            x.m_mask = rct::identity();
            x.m_amount = x.m_tx.vout[x.m_internal_output_index].amount;
          }
          if (ver < 2)
          {
            x.m_spent_height = 0;
          }
          if (ver < 4)
          {
            x.m_rct = x.m_tx.vout[x.m_internal_output_index].amount == 0;
          }
          if (ver < 6)
          {
            x.m_key_image_known = true;
          }
          if (ver < 7)
          {
            x.m_pk_index = 0;
          }
          if (ver < 8)
          {
            x.m_subaddr_index = {};
          }
          if (ver < 9)
          {
            x.m_key_image_partial = false;
            x.m_multisig_k.clear();
            x.m_multisig_info.clear();
          }
      }
  
      template <class Archive>
      inline void serialize(Archive &a, tools::wallet2::transfer_details &x, const boost::serialization::version_type ver)
      {
        a & x.m_block_height;
        a & x.m_global_output_index;
        a & x.m_internal_output_index;
        if (ver < 3)
        {
          cryptonote::transaction tx;
          a & tx;
          x.m_tx = (const cryptonote::transaction_prefix&)tx;
          x.m_txid = cryptonote::get_transaction_hash(tx);
        }
        else
        {
          a & x.m_tx;
        }
        a & x.m_spent;
        a & x.m_key_image;
        if (ver < 1)
        {
          // ensure mask and amount are set
          initialize_transfer_details(a, x, ver);
          return;
        }
        a & x.m_mask;
        a & x.m_amount;
        if (ver < 2)
        {
          initialize_transfer_details(a, x, ver);
          return;
        }
        a & x.m_spent_height;
        if (ver < 3)
        {
          initialize_transfer_details(a, x, ver);
          return;
        }
        a & x.m_txid;
        if (ver < 4)
        {
          initialize_transfer_details(a, x, ver);
          return;
        }
        a & x.m_rct;
        if (ver < 5)
        {
          initialize_transfer_details(a, x, ver);
          return;
        }
        if (ver < 6)
        {
          // v5 did not properly initialize
          uint8_t u;
          a & u;
          x.m_key_image_known = true;
          return;
        }
        a & x.m_key_image_known;
        if (ver < 7)
        {
          initialize_transfer_details(a, x, ver);
          return;
        }
        a & x.m_pk_index;
        if (ver < 8)
        {
          initialize_transfer_details(a, x, ver);
          return;
        }
        a & x.m_subaddr_index;
        if (ver < 9)
        {
          initialize_transfer_details(a, x, ver);
          return;
        }
        a & x.m_multisig_info;
        a & x.m_multisig_k;
        a & x.m_key_image_partial;
      }
  
      template <class Archive>
      inline void serialize(Archive &a, tools::wallet2::multisig_info::LR &x, const boost::serialization::version_type ver)
      {
        a & x.m_L;
        a & x.m_R;
      }
  
      template <class Archive>
      inline void serialize(Archive &a, tools::wallet2::multisig_info &x, const boost::serialization::version_type ver)
      {
        a & x.m_signer;
        a & x.m_LR;
        a & x.m_partial_key_images;
      }
  
      template <class Archive>
      inline void serialize(Archive &a, tools::wallet2::multisig_tx_set &x, const boost::serialization::version_type ver)
      {
        a & x.m_ptx;
        a & x.m_signers;
      }
  
      template <class Archive>
      inline void serialize(Archive &a, tools::wallet2::unconfirmed_transfer_details &x, const boost::serialization::version_type ver)
      {
        a & x.m_change;
        a & x.m_sent_time;
        if (ver < 5)
        {
          cryptonote::transaction tx;
          a & tx;
          x.m_tx = (const cryptonote::transaction_prefix&)tx;
        }
        else
        {
          a & x.m_tx;
        }
        if (ver < 1)
          return;
        a & x.m_dests;
        a & x.m_payment_id;
        if (ver < 2)
          return;
        a & x.m_state;
        if (ver < 3)
          return;
        a & x.m_timestamp;
        if (ver < 4)
          return;
        a & x.m_amount_in;
        a & x.m_amount_out;
        if (ver < 6)
        {
          // v<6 may not have change accumulated in m_amount_out, which is a pain,
          // as it's readily understood to be sum of outputs.
          // We convert it to include change from v6
          if (!typename Archive::is_saving() && x.m_change != (uint64_t)-1)
            x.m_amount_out += x.m_change;
        }
        if (ver < 7)
        {
          x.m_subaddr_account = 0;
          return;
        }
        a & x.m_subaddr_account;
        a & x.m_subaddr_indices;
        if (ver < 8)
          return;
        a & x.m_rings;
      }
  
      template <class Archive>
      inline void serialize(Archive &a, tools::wallet2::confirmed_transfer_details &x, const boost::serialization::version_type ver)
      {
        a & x.m_amount_in;
        a & x.m_amount_out;
        a & x.m_change;
        a & x.m_block_height;
        if (ver < 1)
          return;
        a & x.m_dests;
        a & x.m_payment_id;
        if (ver < 2)
          return;
        a & x.m_timestamp;
        if (ver < 3)
        {
          // v<3 may not have change accumulated in m_amount_out, which is a pain,
          // as it's readily understood to be sum of outputs. Whether it got added
          // or not depends on whether it came from a unconfirmed_transfer_details
          // (not included) or not (included). We can't reliably tell here, so we
          // check whether either yields a "negative" fee, or use the other if so.
          // We convert it to include change from v3
          if (!typename Archive::is_saving() && x.m_change != (uint64_t)-1)
          {
            if (x.m_amount_in > (x.m_amount_out + x.m_change))
              x.m_amount_out += x.m_change;
          }
        }
        if (ver < 4)
        {
          if (!typename Archive::is_saving())
            x.m_unlock_time = 0;
          return;
        }
        a & x.m_unlock_time;
        if (ver < 5)
        {
          x.m_subaddr_account = 0;
          return;
        }
        a & x.m_subaddr_account;
        a & x.m_subaddr_indices;
        if (ver < 6)
          return;
        a & x.m_rings;
      }
  
      template <class Archive>
      inline void serialize(Archive& a, tools::wallet2::payment_details& x, const boost::serialization::version_type ver)
      {
        a & x.m_tx_hash;
        a & x.m_amount;
        a & x.m_block_height;
        a & x.m_unlock_time;
        if (ver < 1)
          return;
        a & x.m_timestamp;
        if (ver < 2)
        {
          x.m_subaddr_index = {};
          return;
        }
        a & x.m_subaddr_index;
        if (ver < 3)
        {
          x.m_fee = 0;
          return;
        }
        a & x.m_fee;
      }
  
      template <class Archive>
      inline void serialize(Archive& a, tools::wallet2::pool_payment_details& x, const boost::serialization::version_type ver)
      {
        a & x.m_pd;
        a & x.m_double_spend_seen;
      }
  
      template <class Archive>
      inline void serialize(Archive& a, tools::wallet2::address_book_row& x, const boost::serialization::version_type ver)
      {
        a & x.m_address;
        a & x.m_payment_id;
        a & x.m_description;
        if (ver < 17)
        {
          x.m_is_subaddress = false;
          return;
        }
        a & x.m_is_subaddress;
      }
  
      template <class Archive>
      inline void serialize(Archive& a, tools::wallet2::reserve_proof_entry& x, const boost::serialization::version_type ver)
      {
        a & x.txid;
        a & x.index_in_tx;
        a & x.shared_secret;
        a & x.key_image;
        a & x.shared_secret_sig;
        a & x.key_image_sig;
      }
  
      template <class Archive>
      inline void serialize(Archive &a, tools::wallet2::unsigned_tx_set &x, const boost::serialization::version_type ver)
      {
        a & x.txes;
        a & x.transfers;
      }
  
      template <class Archive>
      inline void serialize(Archive &a, tools::wallet2::signed_tx_set &x, const boost::serialization::version_type ver)
      {
        a & x.ptx;
        a & x.key_images;
      }
  
      template <class Archive>
      inline void serialize(Archive &a, tools::wallet2::tx_construction_data &x, const boost::serialization::version_type ver)
      {
        a & x.sources;
        a & x.change_dts;
        a & x.splitted_dsts;
        if (ver < 2)
        {
          // load list to vector
          std::list<size_t> selected_transfers;
          a & selected_transfers;
          x.selected_transfers.clear();
          x.selected_transfers.reserve(selected_transfers.size());
          for (size_t t: selected_transfers)
            x.selected_transfers.push_back(t);
        }
        a & x.extra;
        a & x.unlock_time;
        a & x.use_rct;
        a & x.dests;
        if (ver < 1)
        {
          x.subaddr_account = 0;
          return;
        }
        a & x.subaddr_account;
        a & x.subaddr_indices;
        if (ver < 2)
          return;
        a & x.selected_transfers;
      }
  
      template <class Archive>
      inline void serialize(Archive &a, tools::wallet2::multisig_sig &x, const boost::serialization::version_type ver)
      {
        a & x.sigs;
        a & x.ignore;
        a & x.used_L;
        a & x.signing_keys;
        a & x.msout;
      }
  
      template <class Archive>
      inline void serialize(Archive &a, tools::wallet2::pending_tx &x, const boost::serialization::version_type ver)
      {
        a & x.tx;
        a & x.dust;
        a & x.fee;
        a & x.dust_added_to_fee;
        a & x.change_dts;
        if (ver < 2)
        {
          // load list to vector
          std::list<size_t> selected_transfers;
          a & selected_transfers;
          x.selected_transfers.clear();
          x.selected_transfers.reserve(selected_transfers.size());
          for (size_t t: selected_transfers)
            x.selected_transfers.push_back(t);
        }
        a & x.key_images;
        a & x.tx_key;
        a & x.dests;
        a & x.construction_data;
        if (ver < 1)
          return;
        a & x.additional_tx_keys;
        if (ver < 2)
          return;
        a & x.selected_transfers;
        if (ver < 3)
          return;
        a & x.multisig_sigs;
      }
    }
  }
  
  namespace tools
  {
  
    namespace detail
    {
      //----------------------------------------------------------------------------------------------------
      inline void digit_split_strategy(const std::vector<cryptonote::tx_destination_entry>& dsts,
        const cryptonote::tx_destination_entry& change_dst, uint64_t dust_threshold,
        std::vector<cryptonote::tx_destination_entry>& splitted_dsts, std::vector<cryptonote::tx_destination_entry> &dust_dsts)
      {
        splitted_dsts.clear();
        dust_dsts.clear();
  
        for(auto& de: dsts)
        {
          cryptonote::decompose_amount_into_digits(de.amount, 0,
            [&](uint64_t chunk) { splitted_dsts.push_back(cryptonote::tx_destination_entry(chunk, de.addr, de.is_subaddress)); },
            [&](uint64_t a_dust) { splitted_dsts.push_back(cryptonote::tx_destination_entry(a_dust, de.addr, de.is_subaddress)); } );
        }
  
        cryptonote::decompose_amount_into_digits(change_dst.amount, 0,
          [&](uint64_t chunk) {
            if (chunk <= dust_threshold)
              dust_dsts.push_back(cryptonote::tx_destination_entry(chunk, change_dst.addr, false));
            else
              splitted_dsts.push_back(cryptonote::tx_destination_entry(chunk, change_dst.addr, false));
          },
          [&](uint64_t a_dust) { dust_dsts.push_back(cryptonote::tx_destination_entry(a_dust, change_dst.addr, false)); } );
      }
      //----------------------------------------------------------------------------------------------------
      inline void null_split_strategy(const std::vector<cryptonote::tx_destination_entry>& dsts,
        const cryptonote::tx_destination_entry& change_dst, uint64_t dust_threshold,
        std::vector<cryptonote::tx_destination_entry>& splitted_dsts, std::vector<cryptonote::tx_destination_entry> &dust_dsts)
      {
        splitted_dsts = dsts;
  
        dust_dsts.clear();
        uint64_t change = change_dst.amount;
  
        if (0 != change)
        {
          splitted_dsts.push_back(cryptonote::tx_destination_entry(change, change_dst.addr, false));
        }
      }
      //----------------------------------------------------------------------------------------------------
      inline void print_source_entry(const cryptonote::tx_source_entry& src)
      {
        std::string indexes;
        std::for_each(src.outputs.begin(), src.outputs.end(), [&](const cryptonote::tx_source_entry::output_entry& s_e) { indexes += boost::to_string(s_e.first) + " "; });
        LOG_PRINT_L0("amount=" << cryptonote::print_money(src.amount) << ", real_output=" <<src.real_output << ", real_output_in_tx_index=" << src.real_output_in_tx_index << ", indexes: " << indexes);
      }
      //----------------------------------------------------------------------------------------------------
    }
    //----------------------------------------------------------------------------------------------------
    template<typename T>
    void wallet2::transfer(const std::vector<cryptonote::tx_destination_entry>& dsts, const size_t fake_outs_count, const std::vector<size_t> &unused_transfers_indices,
      uint64_t unlock_time, uint64_t fee, const std::vector<uint8_t>& extra, T destination_split_strategy, const tx_dust_policy& dust_policy, bool trusted_daemon)
    {
      pending_tx ptx;
      cryptonote::transaction tx;
      transfer(dsts, fake_outs_count, unused_transfers_indices, unlock_time, fee, extra, destination_split_strategy, dust_policy, tx, ptx, trusted_daemon);
    }
  
    template<typename T>
    void wallet2::transfer(const std::vector<cryptonote::tx_destination_entry>& dsts, const size_t fake_outputs_count, const std::vector<size_t> &unused_transfers_indices,
      uint64_t unlock_time, uint64_t fee, const std::vector<uint8_t>& extra, T destination_split_strategy, const tx_dust_policy& dust_policy, cryptonote::transaction& tx, pending_tx &ptx, bool trusted_daemon)
    {
      using namespace cryptonote;
      // throw if attempting a transaction with no destinations
      THROW_WALLET_EXCEPTION_IF(dsts.empty(), error::zero_destination);
  
      THROW_WALLET_EXCEPTION_IF(m_multisig, error::wallet_internal_error, "Multisig wallets cannot spend non rct outputs");
  
      uint64_t upper_transaction_size_limit = get_upper_transaction_size_limit();
      uint64_t needed_money = fee;
  
      // calculate total amount being sent to all destinations
      // throw if total amount overflows uint64_t
      for(auto& dt: dsts)
      {
        THROW_WALLET_EXCEPTION_IF(0 == dt.amount, error::zero_destination);
        needed_money += dt.amount;
        THROW_WALLET_EXCEPTION_IF(needed_money < dt.amount, error::tx_sum_overflow, dsts, fee, m_nettype);
      }
  
      // randomly select inputs for transaction
      // throw if requested send amount is greater than (unlocked) amount available to send
      std::vector<size_t> selected_transfers;
      uint64_t found_money = select_transfers(needed_money, unused_transfers_indices, selected_transfers, trusted_daemon);
      THROW_WALLET_EXCEPTION_IF(found_money < needed_money, error::not_enough_unlocked_money, found_money, needed_money - fee, fee);
  
      uint32_t subaddr_account = m_transfers[*selected_transfers.begin()].m_subaddr_index.major;
      for (auto i = ++selected_transfers.begin(); i != selected_transfers.end(); ++i)
        THROW_WALLET_EXCEPTION_IF(subaddr_account != *i, error::wallet_internal_error, "the tx uses funds from multiple accounts");
  
      typedef COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::out_entry out_entry;
      typedef cryptonote::tx_source_entry::output_entry tx_output_entry;
  
      COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::response daemon_resp = AUTO_VAL_INIT(daemon_resp);
      if(fake_outputs_count)
      {
        COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::request req = AUTO_VAL_INIT(req);
        req.outs_count = fake_outputs_count + 1;// add one to make possible (if need) to skip real output key
        for(size_t idx: selected_transfers)
        {
          const transfer_container::const_iterator it = m_transfers.begin() + idx;
          THROW_WALLET_EXCEPTION_IF(it->m_tx.vout.size() <= it->m_internal_output_index, error::wallet_internal_error,
            "m_internal_output_index = " + std::to_string(it->m_internal_output_index) +
            " is greater or equal to outputs count = " + std::to_string(it->m_tx.vout.size()));
          req.amounts.push_back(it->amount());
        }
  
        m_daemon_rpc_mutex.lock();
        bool r = epee::net_utils::invoke_http_bin("/getrandom_outs.bin", req, daemon_resp, m_http_client, rpc_timeout);
        m_daemon_rpc_mutex.unlock();
        THROW_WALLET_EXCEPTION_IF(!r, error::no_connection_to_daemon, "getrandom_outs.bin");
        THROW_WALLET_EXCEPTION_IF(daemon_resp.status == CORE_RPC_STATUS_BUSY, error::daemon_busy, "getrandom_outs.bin");
        THROW_WALLET_EXCEPTION_IF(daemon_resp.status != CORE_RPC_STATUS_OK, error::get_random_outs_error, daemon_resp.status);
        THROW_WALLET_EXCEPTION_IF(daemon_resp.outs.size() != selected_transfers.size(), error::wallet_internal_error,
          "daemon returned wrong response for getrandom_outs.bin, wrong amounts count = " +
          std::to_string(daemon_resp.outs.size()) + ", expected " +  std::to_string(selected_transfers.size()));
  
        std::unordered_map<uint64_t, uint64_t> scanty_outs;
        for(COMMAND_RPC_GET_RANDOM_OUTPUTS_FOR_AMOUNTS::outs_for_amount& amount_outs: daemon_resp.outs)
        {
          if (amount_outs.outs.size() < fake_outputs_count)
          {
            scanty_outs[amount_outs.amount] = amount_outs.outs.size();
          }
        }
        THROW_WALLET_EXCEPTION_IF(!scanty_outs.empty(), error::not_enough_outs_to_mix, scanty_outs, fake_outputs_count);
      }
  
      //prepare inputs
      size_t i = 0;
      std::vector<cryptonote::tx_source_entry> sources;
      for(size_t idx: selected_transfers)
      {
        sources.resize(sources.size()+1);
        cryptonote::tx_source_entry& src = sources.back();
        const transfer_details& td = m_transfers[idx];
        src.amount = td.amount();
        src.rct = false;
        //paste mixin transaction
        if(daemon_resp.outs.size())
        {
          daemon_resp.outs[i].outs.sort([](const out_entry& a, const out_entry& b){return a.global_amount_index < b.global_amount_index;});
          for(out_entry& daemon_oe: daemon_resp.outs[i].outs)
          {
            if(td.m_global_output_index == daemon_oe.global_amount_index)
              continue;
            tx_output_entry oe;
            oe.first = daemon_oe.global_amount_index;
            oe.second.dest = rct::pk2rct(daemon_oe.out_key);
            oe.second.mask = rct::identity();
            src.outputs.push_back(oe);
            if(src.outputs.size() >= fake_outputs_count)
              break;
          }
        }
  
        //paste real transaction to the random index
        auto it_to_insert = std::find_if(src.outputs.begin(), src.outputs.end(), [&](const tx_output_entry& a)
        {
          return a.first >= td.m_global_output_index;
        });
        //size_t real_index = src.outputs.size() ? (rand() % src.outputs.size() ):0;
        tx_output_entry real_oe;
        real_oe.first = td.m_global_output_index;
        real_oe.second.dest = rct::pk2rct(boost::get<txout_to_key>(td.m_tx.vout[td.m_internal_output_index].target).key);
        real_oe.second.mask = rct::identity();
        auto interted_it = src.outputs.insert(it_to_insert, real_oe);
        src.real_out_tx_key = get_tx_pub_key_from_extra(td.m_tx);
        src.real_output = interted_it - src.outputs.begin();
        src.real_output_in_tx_index = td.m_internal_output_index;
        src.multisig_kLRki = rct::multisig_kLRki({rct::zero(), rct::zero(), rct::zero(), rct::zero()});
        detail::print_source_entry(src);
        ++i;
      }
  
      cryptonote::tx_destination_entry change_dts = AUTO_VAL_INIT(change_dts);
      if (needed_money < found_money)
      {
        change_dts.addr = get_subaddress({subaddr_account, 0});
        change_dts.amount = found_money - needed_money;
      }
  
      std::vector<cryptonote::tx_destination_entry> splitted_dsts, dust_dsts;
      uint64_t dust = 0;
      destination_split_strategy(dsts, change_dts, dust_policy.dust_threshold, splitted_dsts, dust_dsts);
      for(auto& d: dust_dsts) {
        THROW_WALLET_EXCEPTION_IF(dust_policy.dust_threshold < d.amount, error::wallet_internal_error, "invalid dust value: dust = " +
          std::to_string(d.amount) + ", dust_threshold = " + std::to_string(dust_policy.dust_threshold));
      }
      for(auto& d: dust_dsts) {
        if (!dust_policy.add_to_fee)
          splitted_dsts.push_back(cryptonote::tx_destination_entry(d.amount, dust_policy.addr_for_dust, d.is_subaddress));
        dust += d.amount;
      }
  
      crypto::secret_key tx_key;
      std::vector<crypto::secret_key> additional_tx_keys;
      rct::multisig_out msout;
      bool r = cryptonote::construct_tx_and_get_tx_key(m_account.get_keys(), m_subaddresses, sources, splitted_dsts, change_dts.addr, extra, tx, unlock_time, tx_key, additional_tx_keys, false, false, m_multisig ? &msout : NULL);
      THROW_WALLET_EXCEPTION_IF(!r, error::tx_not_constructed, sources, splitted_dsts, unlock_time, m_nettype);
      THROW_WALLET_EXCEPTION_IF(upper_transaction_size_limit <= get_object_blobsize(tx), error::tx_too_big, tx, upper_transaction_size_limit);
  
      std::string key_images;
      bool all_are_txin_to_key = std::all_of(tx.vin.begin(), tx.vin.end(), [&](const txin_v& s_e) -> bool
      {
        CHECKED_GET_SPECIFIC_VARIANT(s_e, const txin_to_key, in, false);
        key_images += boost::to_string(in.k_image) + " ";
        return true;
      });
      THROW_WALLET_EXCEPTION_IF(!all_are_txin_to_key, error::unexpected_txin_type, tx);
  
      bool dust_sent_elsewhere = (dust_policy.addr_for_dust.m_view_public_key != change_dts.addr.m_view_public_key
                                  || dust_policy.addr_for_dust.m_spend_public_key != change_dts.addr.m_spend_public_key);
  
      if (dust_policy.add_to_fee || dust_sent_elsewhere) change_dts.amount -= dust;
  
      ptx.key_images = key_images;
      ptx.fee = (dust_policy.add_to_fee ? fee+dust : fee);
      ptx.dust = ((dust_policy.add_to_fee || dust_sent_elsewhere) ? dust : 0);
      ptx.dust_added_to_fee = dust_policy.add_to_fee;
      ptx.tx = tx;
      ptx.change_dts = change_dts;
      ptx.selected_transfers = selected_transfers;
      ptx.tx_key = tx_key;
      ptx.additional_tx_keys = additional_tx_keys;
      ptx.dests = dsts;
      ptx.construction_data.sources = sources;
      ptx.construction_data.change_dts = change_dts;
      ptx.construction_data.splitted_dsts = splitted_dsts;
      ptx.construction_data.selected_transfers = selected_transfers;
      ptx.construction_data.extra = tx.extra;
      ptx.construction_data.unlock_time = unlock_time;
      ptx.construction_data.use_rct = false;
      ptx.construction_data.dests = dsts;
      // record which subaddress indices are being used as inputs
      ptx.construction_data.subaddr_account = subaddr_account;
      ptx.construction_data.subaddr_indices.clear();
      for (size_t idx: selected_transfers)
        ptx.construction_data.subaddr_indices.insert(m_transfers[idx].m_subaddr_index.minor);
    }
  
  
  }
  