text: // Copyright (c) 2014-2022, 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
  
  #include <boost/preprocessor/stringize.hpp>
  #include <boost/uuid/nil_generator.hpp>
  #include <boost/filesystem.hpp>
  #include "include_base_utils.h"
  #include "string_tools.h"
  using namespace epee;
  
  #include "core_rpc_server.h"
  #include "common/command_line.h"
  #include "common/updates.h"
  #include "common/download.h"
  #include "common/util.h"
  #include "common/perf_timer.h"
  #include "int-util.h"
  #include "cryptonote_basic/cryptonote_format_utils.h"
  #include "cryptonote_basic/account.h"
  #include "cryptonote_basic/cryptonote_basic_impl.h"
  #include "cryptonote_basic/merge_mining.h"
  #include "cryptonote_core/tx_sanity_check.h"
  #include "misc_language.h"
  #include "net/parse.h"
  #include "storages/http_abstract_invoke.h"
  #include "crypto/hash.h"
  #include "rpc/rpc_args.h"
  #include "rpc/rpc_handler.h"
  #include "rpc/rpc_payment_costs.h"
  #include "rpc/rpc_payment_signature.h"
  #include "core_rpc_server_error_codes.h"
  #include "p2p/net_node.h"
  #include "version.h"
  
  #undef MONERO_DEFAULT_LOG_CATEGORY
  #define MONERO_DEFAULT_LOG_CATEGORY "daemon.rpc"
  
  #define MAX_RESTRICTED_FAKE_OUTS_COUNT 40
  #define MAX_RESTRICTED_GLOBAL_FAKE_OUTS_COUNT 5000
  
  #define OUTPUT_HISTOGRAM_RECENT_CUTOFF_RESTRICTION (3 * 86400) // 3 days max, the wallet requests 1.8 days
  
  #define DEFAULT_PAYMENT_DIFFICULTY 1000
  #define DEFAULT_PAYMENT_CREDITS_PER_HASH 100
  
  #define RESTRICTED_BLOCK_HEADER_RANGE 1000
  #define RESTRICTED_TRANSACTIONS_COUNT 100
  #define RESTRICTED_SPENT_KEY_IMAGES_COUNT 5000
  #define RESTRICTED_BLOCK_COUNT 1000
  
  #define RPC_TRACKER(rpc) \
    PERF_TIMER(rpc); \
    RPCTracker tracker(#rpc, PERF_TIMER_NAME(rpc))
  
  namespace
  {
    class RPCTracker
    {
    public:
      struct entry_t
      {
        uint64_t count;
        uint64_t time;
        uint64_t credits;
      };
  
      RPCTracker(const char *rpc, tools::LoggingPerformanceTimer &timer): rpc(rpc), timer(timer) {
      }
      ~RPCTracker() {
        try
        {
          boost::unique_lock<boost::mutex> lock(mutex);
          auto &e = tracker[rpc];
          ++e.count;
          e.time += timer.value();
        }
        catch (...) { /* ignore */ }
      }
      void pay(uint64_t amount) {
        boost::unique_lock<boost::mutex> lock(mutex);
        auto &e = tracker[rpc];
        e.credits += amount;
      }
      const std::string &rpc_name() const { return rpc; }
      static void clear() { boost::unique_lock<boost::mutex> lock(mutex); tracker.clear(); }
      static std::unordered_map<std::string, entry_t> data() { boost::unique_lock<boost::mutex> lock(mutex); return tracker; }
    private:
      std::string rpc;
      tools::LoggingPerformanceTimer &timer;
      static boost::mutex mutex;
      static std::unordered_map<std::string, entry_t> tracker;
    };
    boost::mutex RPCTracker::mutex;
    std::unordered_map<std::string, RPCTracker::entry_t> RPCTracker::tracker;
  
    void add_reason(std::string &reasons, const char *reason)
    {
      if (!reasons.empty())
        reasons += ", ";
      reasons += reason;
    }
  
    uint64_t round_up(uint64_t value, uint64_t quantum)
    {
      return (value + quantum - 1) / quantum * quantum;
    }
  
    void store_128(boost::multiprecision::uint128_t value, uint64_t &slow64, std::string &swide, uint64_t &stop64)
    {
      slow64 = (value & 0xffffffffffffffff).convert_to<uint64_t>();
      swide = cryptonote::hex(value);
      stop64 = ((value >> 64) & 0xffffffffffffffff).convert_to<uint64_t>();
    }
  
    void store_difficulty(cryptonote::difficulty_type difficulty, uint64_t &sdiff, std::string &swdiff, uint64_t &stop64)
    {
      store_128(difficulty, sdiff, swdiff, stop64);
    }
  }
  
  namespace cryptonote
  {
  
    //-----------------------------------------------------------------------------------
    void core_rpc_server::init_options(boost::program_options::options_description& desc)
    {
      command_line::add_arg(desc, arg_rpc_bind_port);
      command_line::add_arg(desc, arg_rpc_restricted_bind_port);
      command_line::add_arg(desc, arg_restricted_rpc);
      command_line::add_arg(desc, arg_bootstrap_daemon_address);
      command_line::add_arg(desc, arg_bootstrap_daemon_login);
      command_line::add_arg(desc, arg_bootstrap_daemon_proxy);
      cryptonote::rpc_args::init_options(desc, true);
      command_line::add_arg(desc, arg_rpc_payment_address);
      command_line::add_arg(desc, arg_rpc_payment_difficulty);
      command_line::add_arg(desc, arg_rpc_payment_credits);
      command_line::add_arg(desc, arg_rpc_payment_allow_free_loopback);
    }
    //------------------------------------------------------------------------------------------------------------------------------
    core_rpc_server::core_rpc_server(
        core& cr
      , nodetool::node_server<cryptonote::t_cryptonote_protocol_handler<cryptonote::core> >& p2p
      )
      : m_core(cr)
      , m_p2p(p2p)
      , m_was_bootstrap_ever_used(false)
      , disable_rpc_ban(false)
      , m_rpc_payment_allow_free_loopback(false)
    {}
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::set_bootstrap_daemon(
      const std::string &address,
      const std::string &username_password,
      const std::string &proxy)
    {
      boost::optional<epee::net_utils::http::login> credentials;
      const auto loc = username_password.find(':');
      if (loc != std::string::npos)
      {
        credentials = epee::net_utils::http::login(username_password.substr(0, loc), username_password.substr(loc + 1));
      }
      return set_bootstrap_daemon(address, credentials, proxy);
    }
    //------------------------------------------------------------------------------------------------------------------------------
    std::map<std::string, bool> core_rpc_server::get_public_nodes(uint32_t credits_per_hash_threshold/* = 0*/)
    {
      COMMAND_RPC_GET_PUBLIC_NODES::request request;
      COMMAND_RPC_GET_PUBLIC_NODES::response response;
  
      request.gray = true;
      request.white = true;
      request.include_blocked = false;
      if (!on_get_public_nodes(request, response) || response.status != CORE_RPC_STATUS_OK)
      {
        return {};
      }
  
      std::map<std::string, bool> result;
  
      const auto append = [&result, &credits_per_hash_threshold](const std::vector<public_node> &nodes, bool white) {
        for (const auto &node : nodes)
        {
          const bool rpc_payment_enabled = credits_per_hash_threshold > 0;
          const bool node_rpc_payment_enabled = node.rpc_credits_per_hash > 0;
          if (!node_rpc_payment_enabled ||
              (rpc_payment_enabled && node.rpc_credits_per_hash >= credits_per_hash_threshold))
          {
            result.insert(std::make_pair(node.host + ":" + std::to_string(node.rpc_port), white));
          }
        }
      };
  
      append(response.white, true);
      append(response.gray, false);
  
      return result;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::set_bootstrap_daemon(
      const std::string &address,
      const boost::optional<epee::net_utils::http::login> &credentials,
      const std::string &proxy)
    {
      boost::unique_lock<boost::shared_mutex> lock(m_bootstrap_daemon_mutex);
  
      constexpr const uint32_t credits_per_hash_threshold = 0;
      constexpr const bool rpc_payment_enabled = credits_per_hash_threshold != 0;
  
      if (address.empty())
      {
        m_bootstrap_daemon.reset(nullptr);
      }
      else if (address == "auto")
      {
        auto get_nodes = [this]() {
          return get_public_nodes(credits_per_hash_threshold);
        };
        m_bootstrap_daemon.reset(new bootstrap_daemon(std::move(get_nodes), rpc_payment_enabled, m_bootstrap_daemon_proxy.empty() ? proxy : m_bootstrap_daemon_proxy));
      }
      else
      {
        m_bootstrap_daemon.reset(new bootstrap_daemon(address, credentials, rpc_payment_enabled, m_bootstrap_daemon_proxy.empty() ? proxy : m_bootstrap_daemon_proxy));
      }
  
      m_should_use_bootstrap_daemon = m_bootstrap_daemon.get() != nullptr;
  
      return true;
    }
    core_rpc_server::~core_rpc_server()
    {
      if (m_rpc_payment)
        m_rpc_payment->store();
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::init(
        const boost::program_options::variables_map& vm
        , const bool restricted
        , const std::string& port
        , bool allow_rpc_payment
        , const std::string& proxy
      )
    {
      m_bootstrap_daemon_proxy = proxy;
      m_restricted = restricted;
      m_net_server.set_threads_prefix("RPC");
      m_net_server.set_connection_filter(&m_p2p);
  
      auto rpc_config = cryptonote::rpc_args::process(vm, true);
      if (!rpc_config)
        return false;
  
      std::string bind_ip_str = rpc_config->bind_ip;
      std::string bind_ipv6_str = rpc_config->bind_ipv6_address;
      if (restricted)
      {
        const auto restricted_rpc_port_arg = cryptonote::core_rpc_server::arg_rpc_restricted_bind_port;
        const bool has_restricted_rpc_port_arg = !command_line::is_arg_defaulted(vm, restricted_rpc_port_arg);
        if (has_restricted_rpc_port_arg && port == command_line::get_arg(vm, restricted_rpc_port_arg))
        {
          bind_ip_str = rpc_config->restricted_bind_ip;
          bind_ipv6_str = rpc_config->restricted_bind_ipv6_address;
        }
      }
      disable_rpc_ban = rpc_config->disable_rpc_ban;
      const std::string data_dir{command_line::get_arg(vm, cryptonote::arg_data_dir)};
      std::string address = command_line::get_arg(vm, arg_rpc_payment_address);
      if (!address.empty() && allow_rpc_payment)
      {
        if (!m_restricted && nettype() != FAKECHAIN)
        {
          MFATAL("RPC payment enabled, but server is not restricted, anyone can adjust their balance to bypass payment");
          return false;
        }
        cryptonote::address_parse_info info;
        if (!get_account_address_from_str(info, nettype(), address))
        {
          MFATAL("Invalid payment address: " << address);
          return false;
        }
        if (info.is_subaddress)
        {
          MFATAL("Payment address may not be a subaddress: " << address);
          return false;
        }
        uint64_t diff = command_line::get_arg(vm, arg_rpc_payment_difficulty);
        uint64_t credits = command_line::get_arg(vm, arg_rpc_payment_credits);
        if (diff == 0 || credits == 0)
        {
          MFATAL("Payments difficulty and/or payments credits are 0, but a payment address was given");
          return false;
        }
        m_rpc_payment_allow_free_loopback = command_line::get_arg(vm, arg_rpc_payment_allow_free_loopback);
        m_rpc_payment.reset(new rpc_payment(info.address, diff, credits));
        m_rpc_payment->load(data_dir);
        m_p2p.set_rpc_credits_per_hash(RPC_CREDITS_PER_HASH_SCALE * (credits / (float)diff));
      }
  
      if (!m_rpc_payment)
      {
        uint32_t bind_ip;
        bool ok = epee::string_tools::get_ip_int32_from_string(bind_ip, bind_ip_str);
        if (ok & !epee::net_utils::is_ip_loopback(bind_ip))
          MWARNING("The RPC server is accessible from the outside, but no RPC payment was setup. RPC access will be free for all.");
      }
  
      if (!set_bootstrap_daemon(
            command_line::get_arg(vm, arg_bootstrap_daemon_address),
            command_line::get_arg(vm, arg_bootstrap_daemon_login),
            command_line::get_arg(vm, arg_bootstrap_daemon_proxy)))
      {
        MFATAL("Failed to parse bootstrap daemon address");
        return false;
      }
  
      boost::optional<epee::net_utils::http::login> http_login{};
  
      if (rpc_config->login)
        http_login.emplace(std::move(rpc_config->login->username), std::move(rpc_config->login->password).password());
  
      if (m_rpc_payment)
        m_net_server.add_idle_handler([this](){ return m_rpc_payment->on_idle(); }, 60 * 1000);
  
      bool store_ssl_key = !restricted && rpc_config->ssl_options && rpc_config->ssl_options.auth.certificate_path.empty();
      const auto ssl_base_path = (boost::filesystem::path{data_dir} / "rpc_ssl").string();
      if (store_ssl_key && boost::filesystem::exists(ssl_base_path + ".crt"))
      {
        // load key from previous run, password prompted by OpenSSL
        store_ssl_key = false;
        rpc_config->ssl_options.auth =
          epee::net_utils::ssl_authentication_t{ssl_base_path + ".key", ssl_base_path + ".crt"};
      }
  
      auto rng = [](size_t len, uint8_t *ptr){ return crypto::rand(len, ptr); };
      const bool inited = epee::http_server_impl_base<core_rpc_server, connection_context>::init(
        rng, std::move(port), std::move(bind_ip_str),
        std::move(bind_ipv6_str), std::move(rpc_config->use_ipv6), std::move(rpc_config->require_ipv4),
        std::move(rpc_config->access_control_origins), std::move(http_login), std::move(rpc_config->ssl_options)
      );
  
      if (store_ssl_key && inited)
      {
        // new keys were generated, store for next run
        const auto error = epee::net_utils::store_ssl_keys(m_net_server.get_ssl_context(), ssl_base_path);
        if (error)
          MFATAL("Failed to store HTTP SSL cert/key for " << (restricted ? "restricted " : "") << "RPC server: " << error.message());
        return !bool(error);
      }
      return inited;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::check_payment(const std::string &client_message, uint64_t payment, const std::string &rpc, bool same_ts, std::string &message, uint64_t &credits, std::string &top_hash)
    {
      if (m_rpc_payment == NULL)
      {
        credits = 0;
        return true;
      }
      uint64_t height;
      crypto::hash hash;
      m_core.get_blockchain_top(height, hash);
      top_hash = epee::string_tools::pod_to_hex(hash);
      crypto::public_key client;
      uint64_t ts;
  #ifndef NDEBUG
      if (nettype() == TESTNET && client_message == "debug")
      {
        credits = 0;
        return true;
      }
  #endif
      if (!cryptonote::verify_rpc_payment_signature(client_message, client, ts))
      {
        credits = 0;
        message = "Client signature does not verify for " + rpc;
        return false;
      }
      if (!m_rpc_payment->pay(client, ts, payment, rpc, same_ts, credits))
      {
        message = CORE_RPC_STATUS_PAYMENT_REQUIRED;
        return false;
      }
      return true;
    }
  #define CHECK_PAYMENT_BASE(req, res, payment, same_ts) do { if (!ctx) break; uint64_t P = (uint64_t)payment; if (P > 0 && !check_payment(req.client, P, tracker.rpc_name(), same_ts, res.status, res.credits, res.top_hash)){return true;} tracker.pay(P); } while(0)
  #define CHECK_PAYMENT(req, res, payment) CHECK_PAYMENT_BASE(req, res, payment, false)
  #define CHECK_PAYMENT_SAME_TS(req, res, payment) CHECK_PAYMENT_BASE(req, res, payment, true)
  #define CHECK_PAYMENT_MIN1(req, res, payment, same_ts) do { if (!ctx || (m_rpc_payment_allow_free_loopback && ctx->m_remote_address.is_loopback())) break; uint64_t P = (uint64_t)payment; if (P == 0) P = 1; if(!check_payment(req.client, P, tracker.rpc_name(), same_ts, res.status, res.credits, res.top_hash)){return true;} tracker.pay(P); } while(0)
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::check_core_ready()
    {
      if(!m_p2p.get_payload_object().is_synchronized())
      {
        return false;
      }
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::add_host_fail(const connection_context *ctx, unsigned int score)
    {
      if(!ctx || !ctx->m_remote_address.is_blockable() || disable_rpc_ban)
        return false;
  
      CRITICAL_REGION_LOCAL(m_host_fails_score_lock);
      uint64_t fails = m_host_fails_score[ctx->m_remote_address.host_str()] += score;
      MDEBUG("Host " << ctx->m_remote_address.host_str() << " fail score=" << fails);
      if(fails > RPC_IP_FAILS_BEFORE_BLOCK)
      {
        auto it = m_host_fails_score.find(ctx->m_remote_address.host_str());
        CHECK_AND_ASSERT_MES(it != m_host_fails_score.end(), false, "internal error");
        it->second = RPC_IP_FAILS_BEFORE_BLOCK/2;
        m_p2p.block_host(ctx->m_remote_address);
      }
      return true;
    }
  #define CHECK_CORE_READY() do { if(!check_core_ready()){res.status =  CORE_RPC_STATUS_BUSY;return true;} } while(0)
  
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_height(const COMMAND_RPC_GET_HEIGHT::request& req, COMMAND_RPC_GET_HEIGHT::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(get_height);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_HEIGHT>(invoke_http_mode::JON, "/getheight", req, res, r))
        return r;
  
      crypto::hash hash;
      m_core.get_blockchain_top(res.height, hash);
      ++res.height; // block height to chain height
      res.hash = string_tools::pod_to_hex(hash);
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_info(const COMMAND_RPC_GET_INFO::request& req, COMMAND_RPC_GET_INFO::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(get_info);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_INFO>(invoke_http_mode::JON, "/getinfo", req, res, r))
      {
        {
          boost::shared_lock<boost::shared_mutex> lock(m_bootstrap_daemon_mutex);
          if (m_bootstrap_daemon.get() != nullptr)
          {
            res.bootstrap_daemon_address = m_bootstrap_daemon->address();
          }
        }
        crypto::hash top_hash;
        m_core.get_blockchain_top(res.height_without_bootstrap, top_hash);
        ++res.height_without_bootstrap; // turn top block height into blockchain height
        res.was_bootstrap_ever_used = true;
        return r;
      }
  
      CHECK_PAYMENT_MIN1(req, res, COST_PER_GET_INFO, false);
      db_rtxn_guard rtxn_guard(&m_core.get_blockchain_storage().get_db());
  
      const bool restricted = m_restricted && ctx;
  
      crypto::hash top_hash;
      m_core.get_blockchain_top(res.height, top_hash);
      ++res.height; // turn top block height into blockchain height
      res.top_block_hash = string_tools::pod_to_hex(top_hash);
      res.target_height = m_p2p.get_payload_object().is_synchronized() ? 0 : m_core.get_target_blockchain_height();
      store_difficulty(m_core.get_blockchain_storage().get_difficulty_for_next_block(), res.difficulty, res.wide_difficulty, res.difficulty_top64);
      res.target = m_core.get_blockchain_storage().get_difficulty_target();
      res.tx_count = m_core.get_blockchain_storage().get_total_transactions() - res.height; //without coinbase
      res.tx_pool_size = m_core.get_pool_transactions_count(!restricted);
      res.alt_blocks_count = restricted ? 0 : m_core.get_blockchain_storage().get_alternative_blocks_count();
      uint64_t total_conn = restricted ? 0 : m_p2p.get_public_connections_count();
      res.outgoing_connections_count = restricted ? 0 : m_p2p.get_public_outgoing_connections_count();
      res.incoming_connections_count = restricted ? 0 : (total_conn - res.outgoing_connections_count);
      res.rpc_connections_count = restricted ? 0 : get_connections_count();
      res.white_peerlist_size = restricted ? 0 : m_p2p.get_public_white_peers_count();
      res.grey_peerlist_size = restricted ? 0 : m_p2p.get_public_gray_peers_count();
  
      cryptonote::network_type net_type = nettype();
      res.mainnet = net_type == MAINNET;
      res.testnet = net_type == TESTNET;
      res.stagenet = net_type == STAGENET;
      res.nettype = net_type == MAINNET ? "mainnet" : net_type == TESTNET ? "testnet" : net_type == STAGENET ? "stagenet" : "fakechain";
      store_difficulty(m_core.get_blockchain_storage().get_db().get_block_cumulative_difficulty(res.height - 1),
          res.cumulative_difficulty, res.wide_cumulative_difficulty, res.cumulative_difficulty_top64);
      res.block_size_limit = res.block_weight_limit = m_core.get_blockchain_storage().get_current_cumulative_block_weight_limit();
      res.block_size_median = res.block_weight_median = m_core.get_blockchain_storage().get_current_cumulative_block_weight_median();
      res.adjusted_time = m_core.get_blockchain_storage().get_adjusted_time(res.height);
  
      res.start_time = restricted ? 0 : (uint64_t)m_core.get_start_time();
      res.free_space = restricted ? std::numeric_limits<uint64_t>::max() : m_core.get_free_space();
      res.offline = m_core.offline();
      res.height_without_bootstrap = restricted ? 0 : res.height;
      if (restricted)
      {
        res.bootstrap_daemon_address = "";
        res.was_bootstrap_ever_used = false;
      }
      else
      {
        boost::shared_lock<boost::shared_mutex> lock(m_bootstrap_daemon_mutex);
        if (m_bootstrap_daemon.get() != nullptr)
        {
          res.bootstrap_daemon_address = m_bootstrap_daemon->address();
        }
        res.was_bootstrap_ever_used = m_was_bootstrap_ever_used;
      }
      res.database_size = m_core.get_blockchain_storage().get_db().get_database_size();
      if (restricted)
        res.database_size = round_up(res.database_size, 5ull* 1024 * 1024 * 1024);
      res.update_available = restricted ? false : m_core.is_update_available();
      res.version = restricted ? "" : MONERO_VERSION_FULL;
      res.synchronized = check_core_ready();
      res.busy_syncing = m_p2p.get_payload_object().is_busy_syncing();
      res.restricted = restricted;
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_net_stats(const COMMAND_RPC_GET_NET_STATS::request& req, COMMAND_RPC_GET_NET_STATS::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(get_net_stats);
      // No bootstrap daemon check: Only ever get stats about local server
      res.start_time = (uint64_t)m_core.get_start_time();
      {
        CRITICAL_REGION_LOCAL(epee::net_utils::network_throttle_manager::m_lock_get_global_throttle_in);
        epee::net_utils::network_throttle_manager::get_global_throttle_in().get_stats(res.total_packets_in, res.total_bytes_in);
      }
      {
        CRITICAL_REGION_LOCAL(epee::net_utils::network_throttle_manager::m_lock_get_global_throttle_out);
        epee::net_utils::network_throttle_manager::get_global_throttle_out().get_stats(res.total_packets_out, res.total_bytes_out);
      }
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    class pruned_transaction {
      transaction& tx;
    public:
      pruned_transaction(transaction& tx) : tx(tx) {}
      BEGIN_SERIALIZE_OBJECT()
        bool r = tx.serialize_base(ar);
        if (!r) return false;
      END_SERIALIZE()
    };
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_blocks(const COMMAND_RPC_GET_BLOCKS_FAST::request& req, COMMAND_RPC_GET_BLOCKS_FAST::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(get_blocks);
  
      bool use_bootstrap_daemon;
      {
        boost::shared_lock<boost::shared_mutex> lock(m_bootstrap_daemon_mutex);
        use_bootstrap_daemon = m_should_use_bootstrap_daemon;
      }
      if (use_bootstrap_daemon)
      {
        bool r;
        return use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_BLOCKS_FAST>(invoke_http_mode::BIN, "/getblocks.bin", req, res, r);
      }
  
      CHECK_PAYMENT(req, res, 1);
      db_rtxn_guard rtxn_guard(&m_core.get_blockchain_storage().get_db());
  
      // quick check for noop
      if (!req.block_ids.empty())
      {
        uint64_t last_block_height;
        crypto::hash last_block_hash;
        m_core.get_blockchain_top(last_block_height, last_block_hash);
        if (last_block_hash == req.block_ids.front())
        {
          res.start_height = 0;
          res.current_height = last_block_height + 1;
          res.status = CORE_RPC_STATUS_OK;
          return true;
        }
      }
  
      size_t max_blocks = COMMAND_RPC_GET_BLOCKS_FAST_MAX_BLOCK_COUNT;
      if (m_rpc_payment)
      {
        max_blocks = res.credits / COST_PER_BLOCK;
        if (max_blocks > COMMAND_RPC_GET_BLOCKS_FAST_MAX_BLOCK_COUNT)
          max_blocks = COMMAND_RPC_GET_BLOCKS_FAST_MAX_BLOCK_COUNT;
        if (max_blocks == 0)
        {
          res.status = CORE_RPC_STATUS_PAYMENT_REQUIRED;
          return true;
        }
      }
  
      std::vector<std::pair<std::pair<cryptonote::blobdata, crypto::hash>, std::vector<std::pair<crypto::hash, cryptonote::blobdata> > > > bs;
      if(!m_core.find_blockchain_supplement(req.start_height, req.block_ids, bs, res.current_height, res.start_height, req.prune, !req.no_miner_tx, max_blocks, COMMAND_RPC_GET_BLOCKS_FAST_MAX_TX_COUNT))
      {
        res.status = "Failed";
        add_host_fail(ctx);
        return true;
      }
  
      CHECK_PAYMENT_SAME_TS(req, res, bs.size() * COST_PER_BLOCK);
  
      size_t size = 0, ntxes = 0;
      res.blocks.reserve(bs.size());
      res.output_indices.reserve(bs.size());
      for(auto& bd: bs)
      {
        res.blocks.resize(res.blocks.size()+1);
        res.blocks.back().pruned = req.prune;
        res.blocks.back().block = bd.first.first;
        size += bd.first.first.size();
        res.output_indices.push_back(COMMAND_RPC_GET_BLOCKS_FAST::block_output_indices());
        ntxes += bd.second.size();
        res.output_indices.back().indices.reserve(1 + bd.second.size());
        if (req.no_miner_tx)
          res.output_indices.back().indices.push_back(COMMAND_RPC_GET_BLOCKS_FAST::tx_output_indices());
        res.blocks.back().txs.reserve(bd.second.size());
        for (std::vector<std::pair<crypto::hash, cryptonote::blobdata>>::iterator i = bd.second.begin(); i != bd.second.end(); ++i)
        {
          res.blocks.back().txs.push_back({std::move(i->second), crypto::null_hash});
          i->second.clear();
          i->second.shrink_to_fit();
          size += res.blocks.back().txs.back().blob.size();
        }
  
        const size_t n_txes_to_lookup = bd.second.size() + (req.no_miner_tx ? 0 : 1);
        if (n_txes_to_lookup > 0)
        {
          std::vector<std::vector<uint64_t>> indices;
          bool r = m_core.get_tx_outputs_gindexs(req.no_miner_tx ? bd.second.front().first : bd.first.second, n_txes_to_lookup, indices);
          if (!r)
          {
            res.status = "Failed";
            return true;
          }
          if (indices.size() != n_txes_to_lookup || res.output_indices.back().indices.size() != (req.no_miner_tx ? 1 : 0))
          {
            res.status = "Failed";
            return true;
          }
          for (size_t i = 0; i < indices.size(); ++i)
            res.output_indices.back().indices.push_back({std::move(indices[i])});
        }
      }
  
      MDEBUG("on_get_blocks: " << bs.size() << " blocks, " << ntxes << " txes, size " << size);
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
      bool core_rpc_server::on_get_alt_blocks_hashes(const COMMAND_RPC_GET_ALT_BLOCKS_HASHES::request& req, COMMAND_RPC_GET_ALT_BLOCKS_HASHES::response& res, const connection_context *ctx)
      {
        RPC_TRACKER(get_alt_blocks_hashes);
        bool r;
        if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_ALT_BLOCKS_HASHES>(invoke_http_mode::JON, "/get_alt_blocks_hashes", req, res, r))
          return r;
  
        std::vector<block> blks;
  
        if(!m_core.get_alternative_blocks(blks))
        {
            res.status = "Failed";
            return true;
        }
  
        res.blks_hashes.reserve(blks.size());
  
        for (auto const& blk: blks)
        {
            res.blks_hashes.push_back(epee::string_tools::pod_to_hex(get_block_hash(blk)));
        }
  
        MDEBUG("on_get_alt_blocks_hashes: " << blks.size() << " blocks " );
        res.status = CORE_RPC_STATUS_OK;
        return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_blocks_by_height(const COMMAND_RPC_GET_BLOCKS_BY_HEIGHT::request& req, COMMAND_RPC_GET_BLOCKS_BY_HEIGHT::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(get_blocks_by_height);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_BLOCKS_BY_HEIGHT>(invoke_http_mode::BIN, "/getblocks_by_height.bin", req, res, r))
        return r;
  
      const bool restricted = m_restricted && ctx;
      if (restricted && req.heights.size() > RESTRICTED_BLOCK_COUNT)
      {
        res.status = "Too many blocks requested in restricted mode";
        return true;
      }
  
      res.status = "Failed";
      res.blocks.clear();
      res.blocks.reserve(req.heights.size());
      CHECK_PAYMENT_MIN1(req, res, req.heights.size() * COST_PER_BLOCK, false);
      db_rtxn_guard rtxn_guard(&m_core.get_blockchain_storage().get_db());
      for (uint64_t height : req.heights)
      {
        block blk;
        try
        {
          blk = m_core.get_blockchain_storage().get_db().get_block_from_height(height);
        }
        catch (...)
        {
          res.status = "Error retrieving block at height " + std::to_string(height);
          return true;
        }
        std::vector<transaction> txs;
        std::vector<crypto::hash> missed_txs;
        m_core.get_transactions(blk.tx_hashes, txs, missed_txs);
        res.blocks.resize(res.blocks.size() + 1);
        res.blocks.back().block = block_to_blob(blk);
        for (auto& tx : txs)
          res.blocks.back().txs.push_back({tx_to_blob(tx), crypto::null_hash});
      }
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_hashes(const COMMAND_RPC_GET_HASHES_FAST::request& req, COMMAND_RPC_GET_HASHES_FAST::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(get_hashes);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_HASHES_FAST>(invoke_http_mode::BIN, "/gethashes.bin", req, res, r))
        return r;
  
      CHECK_PAYMENT(req, res, 1);
  
      res.start_height = req.start_height;
      if(!m_core.get_blockchain_storage().find_blockchain_supplement(req.block_ids, res.m_block_ids, NULL, res.start_height, res.current_height, false))
      {
        res.status = "Failed";
        add_host_fail(ctx);
        return true;
      }
  
      CHECK_PAYMENT_SAME_TS(req, res, res.m_block_ids.size() * COST_PER_BLOCK_HASH);
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_outs_bin(const COMMAND_RPC_GET_OUTPUTS_BIN::request& req, COMMAND_RPC_GET_OUTPUTS_BIN::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(get_outs_bin);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_OUTPUTS_BIN>(invoke_http_mode::BIN, "/get_outs.bin", req, res, r))
        return r;
  
      CHECK_PAYMENT_MIN1(req, res, req.outputs.size() * COST_PER_OUT, false);
  
      res.status = "Failed";
  
      const bool restricted = m_restricted && ctx;
      if (restricted)
      {
        if (req.outputs.size() > MAX_RESTRICTED_GLOBAL_FAKE_OUTS_COUNT)
        {
          res.status = "Too many outs requested";
          return true;
        }
      }
  
      if(!m_core.get_outs(req, res))
      {
        return true;
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_outs(const COMMAND_RPC_GET_OUTPUTS::request& req, COMMAND_RPC_GET_OUTPUTS::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(get_outs);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_OUTPUTS>(invoke_http_mode::JON, "/get_outs", req, res, r))
        return r;
  
      CHECK_PAYMENT_MIN1(req, res, req.outputs.size() * COST_PER_OUT, false);
  
      res.status = "Failed";
  
      const bool restricted = m_restricted && ctx;
      if (restricted)
      {
        if (req.outputs.size() > MAX_RESTRICTED_GLOBAL_FAKE_OUTS_COUNT)
        {
          res.status = "Too many outs requested";
          return true;
        }
      }
  
      cryptonote::COMMAND_RPC_GET_OUTPUTS_BIN::request req_bin;
      req_bin.outputs = req.outputs;
      req_bin.get_txid = req.get_txid;
      cryptonote::COMMAND_RPC_GET_OUTPUTS_BIN::response res_bin;
      if(!m_core.get_outs(req_bin, res_bin))
      {
        return true;
      }
  
      // convert to text
      for (const auto &i: res_bin.outs)
      {
        res.outs.push_back(cryptonote::COMMAND_RPC_GET_OUTPUTS::outkey());
        cryptonote::COMMAND_RPC_GET_OUTPUTS::outkey &outkey = res.outs.back();
        outkey.key = epee::string_tools::pod_to_hex(i.key);
        outkey.mask = epee::string_tools::pod_to_hex(i.mask);
        outkey.unlocked = i.unlocked;
        outkey.height = i.height;
        if (req.get_txid)
          outkey.txid = epee::string_tools::pod_to_hex(i.txid);
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_indexes(const COMMAND_RPC_GET_TX_GLOBAL_OUTPUTS_INDEXES::request& req, COMMAND_RPC_GET_TX_GLOBAL_OUTPUTS_INDEXES::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(get_indexes);
      bool ok;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_TX_GLOBAL_OUTPUTS_INDEXES>(invoke_http_mode::BIN, "/get_o_indexes.bin", req, res, ok))
        return ok;
  
      CHECK_PAYMENT_MIN1(req, res, COST_PER_OUTPUT_INDEXES, false);
  
      bool r = m_core.get_tx_outputs_gindexs(req.txid, res.o_indexes);
      if(!r)
      {
        res.status = "Failed";
        return true;
      }
      res.status = CORE_RPC_STATUS_OK;
      LOG_PRINT_L2("COMMAND_RPC_GET_TX_GLOBAL_OUTPUTS_INDEXES: [" << res.o_indexes.size() << "]");
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_transactions(const COMMAND_RPC_GET_TRANSACTIONS::request& req, COMMAND_RPC_GET_TRANSACTIONS::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(get_transactions);
      bool ok;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_TRANSACTIONS>(invoke_http_mode::JON, "/gettransactions", req, res, ok))
        return ok;
  
      const bool restricted = m_restricted && ctx;
      const bool request_has_rpc_origin = ctx != NULL;
  
      if (restricted && req.txs_hashes.size() > RESTRICTED_TRANSACTIONS_COUNT)
      {
        res.status = "Too many transactions requested in restricted mode";
        return true;
      }
  
      CHECK_PAYMENT_MIN1(req, res, req.txs_hashes.size() * COST_PER_TX, false);
  
      std::vector<crypto::hash> vh;
      for(const auto& tx_hex_str: req.txs_hashes)
      {
        blobdata b;
        if(!string_tools::parse_hexstr_to_binbuff(tx_hex_str, b))
        {
          res.status = "Failed to parse hex representation of transaction hash";
          return true;
        }
        if(b.size() != sizeof(crypto::hash))
        {
          res.status = "Failed, size of data mismatch";
          return true;
        }
        vh.push_back(*reinterpret_cast<const crypto::hash*>(b.data()));
      }
      std::vector<crypto::hash> missed_txs;
      std::vector<std::tuple<crypto::hash, cryptonote::blobdata, crypto::hash, cryptonote::blobdata>> txs;
      bool r = m_core.get_split_transactions_blobs(vh, txs, missed_txs);
      if(!r)
      {
        res.status = "Failed";
        return true;
      }
      LOG_PRINT_L2("Found " << txs.size() << "/" << vh.size() << " transactions on the blockchain");
  
      // try the pool for any missing txes
      size_t found_in_pool = 0;
      std::unordered_set<crypto::hash> pool_tx_hashes;
      std::unordered_map<crypto::hash, tx_info> per_tx_pool_tx_info;
      if (!missed_txs.empty())
      {
        std::vector<tx_info> pool_tx_info;
        std::vector<spent_key_image_info> pool_key_image_info;
        bool r = m_core.get_pool_transactions_and_spent_keys_info(pool_tx_info, pool_key_image_info, !request_has_rpc_origin || !restricted);
        if(r)
        {
          // sort to match original request
          std::vector<std::tuple<crypto::hash, cryptonote::blobdata, crypto::hash, cryptonote::blobdata>> sorted_txs;
          std::vector<tx_info>::const_iterator i;
          unsigned txs_processed = 0;
          for (const crypto::hash &h: vh)
          {
            if (std::find(missed_txs.begin(), missed_txs.end(), h) == missed_txs.end())
            {
              if (txs.size() == txs_processed)
              {
                res.status = "Failed: internal error - txs is empty";
                return true;
              }
              // core returns the ones it finds in the right order
              if (std::get<0>(txs[txs_processed]) != h)
              {
                res.status = "Failed: tx hash mismatch";
                return true;
              }
              sorted_txs.push_back(std::move(txs[txs_processed]));
              ++txs_processed;
            }
            else if ((i = std::find_if(pool_tx_info.begin(), pool_tx_info.end(), [h](const tx_info &txi) { return epee::string_tools::pod_to_hex(h) == txi.id_hash; })) != pool_tx_info.end())
            {
              cryptonote::transaction tx;
              if (!cryptonote::parse_and_validate_tx_from_blob(i->tx_blob, tx))
              {
                res.status = "Failed to parse and validate tx from blob";
                return true;
              }
              std::stringstream ss;
              binary_archive<true> ba(ss);
              bool r = const_cast<cryptonote::transaction&>(tx).serialize_base(ba);
              if (!r)
              {
                res.status = "Failed to serialize transaction base";
                return true;
              }
              const cryptonote::blobdata pruned = ss.str();
              const crypto::hash prunable_hash = tx.version == 1 ? crypto::null_hash : get_transaction_prunable_hash(tx);
              sorted_txs.push_back(std::make_tuple(h, pruned, prunable_hash, std::string(i->tx_blob, pruned.size())));
              missed_txs.erase(std::find(missed_txs.begin(), missed_txs.end(), h));
              pool_tx_hashes.insert(h);
              const std::string hash_string = epee::string_tools::pod_to_hex(h);
              for (const auto &ti: pool_tx_info)
              {
                if (ti.id_hash == hash_string)
                {
                  per_tx_pool_tx_info.insert(std::make_pair(h, ti));
                  break;
                }
              }
              ++found_in_pool;
            }
          }
          txs = sorted_txs;
        }
        LOG_PRINT_L2("Found " << found_in_pool << "/" << vh.size() << " transactions in the pool");
      }
  
      CHECK_AND_ASSERT_MES(txs.size() + missed_txs.size() == vh.size(), false, "mismatched number of txs");
  
      auto txhi = req.txs_hashes.cbegin();
      auto vhi = vh.cbegin();
      auto missedi = missed_txs.cbegin();
  
      for(auto& tx: txs)
      {
        res.txs.push_back(COMMAND_RPC_GET_TRANSACTIONS::entry());
        COMMAND_RPC_GET_TRANSACTIONS::entry &e = res.txs.back();
  
        while (missedi != missed_txs.end() && *missedi == *vhi)
        {
            ++vhi;
            ++txhi;
            ++missedi;
        }
  
        crypto::hash tx_hash = *vhi++;
        CHECK_AND_ASSERT_MES(tx_hash == std::get<0>(tx), false, "mismatched tx hash");
        e.tx_hash = *txhi++;
        e.prunable_hash = epee::string_tools::pod_to_hex(std::get<2>(tx));
        if (req.split || req.prune || std::get<3>(tx).empty())
        {
          // use splitted form with pruned and prunable (filled only when prune=false and the daemon has it), leaving as_hex as empty
          e.pruned_as_hex = string_tools::buff_to_hex_nodelimer(std::get<1>(tx));
          if (!req.prune)
            e.prunable_as_hex = string_tools::buff_to_hex_nodelimer(std::get<3>(tx));
          if (req.decode_as_json)
          {
            cryptonote::blobdata tx_data;
            cryptonote::transaction t;
            if (req.prune || std::get<3>(tx).empty())
            {
              // decode pruned tx to JSON
              tx_data = std::get<1>(tx);
              if (cryptonote::parse_and_validate_tx_base_from_blob(tx_data, t))
              {
                pruned_transaction pruned_tx{t};
                e.as_json = obj_to_json_str(pruned_tx);
              }
              else
              {
                res.status = "Failed to parse and validate pruned tx from blob";
                return true;
              }
            }
            else
            {
              // decode full tx to JSON
              tx_data = std::get<1>(tx) + std::get<3>(tx);
              if (cryptonote::parse_and_validate_tx_from_blob(tx_data, t))
              {
                e.as_json = obj_to_json_str(t);
              }
              else
              {
                res.status = "Failed to parse and validate tx from blob";
                return true;
              }
            }
          }
        }
        else
        {
          // use non-splitted form, leaving pruned_as_hex and prunable_as_hex as empty
          cryptonote::blobdata tx_data = std::get<1>(tx) + std::get<3>(tx);
          e.as_hex = string_tools::buff_to_hex_nodelimer(tx_data);
          if (req.decode_as_json)
          {
            cryptonote::transaction t;
            if (cryptonote::parse_and_validate_tx_from_blob(tx_data, t))
            {
              e.as_json = obj_to_json_str(t);
            }
            else
            {
              res.status = "Failed to parse and validate tx from blob";
              return true;
            }
          }
        }
        e.in_pool = pool_tx_hashes.find(tx_hash) != pool_tx_hashes.end();
        if (e.in_pool)
        {
          e.block_height = e.block_timestamp = std::numeric_limits<uint64_t>::max();
          e.confirmations = 0;
          auto it = per_tx_pool_tx_info.find(tx_hash);
          if (it != per_tx_pool_tx_info.end())
          {
            e.double_spend_seen = it->second.double_spend_seen;
            e.relayed = it->second.relayed;
            e.received_timestamp = it->second.receive_time;
          }
          else
          {
            MERROR("Failed to determine pool info for " << tx_hash);
            e.double_spend_seen = false;
            e.relayed = false;
            e.received_timestamp = 0;
          }
        }
        else
        {
          e.block_height = m_core.get_blockchain_storage().get_db().get_tx_block_height(tx_hash);
          e.confirmations = m_core.get_current_blockchain_height() - e.block_height;
          e.block_timestamp = m_core.get_blockchain_storage().get_db().get_block_timestamp(e.block_height);
          e.received_timestamp = 0;
          e.double_spend_seen = false;
          e.relayed = false;
        }
  
        // fill up old style responses too, in case an old wallet asks
        res.txs_as_hex.push_back(e.as_hex);
        if (req.decode_as_json)
          res.txs_as_json.push_back(e.as_json);
  
        // output indices too if not in pool
        if (pool_tx_hashes.find(tx_hash) == pool_tx_hashes.end())
        {
          bool r = m_core.get_tx_outputs_gindexs(tx_hash, e.output_indices);
          if (!r)
          {
            res.status = "Failed";
            return true;
          }
        }
      }
  
      for(const auto& miss_tx: missed_txs)
      {
        res.missed_tx.push_back(string_tools::pod_to_hex(miss_tx));
      }
  
      LOG_PRINT_L2(res.txs.size() << " transactions found, " << res.missed_tx.size() << " not found");
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_is_key_image_spent(const COMMAND_RPC_IS_KEY_IMAGE_SPENT::request& req, COMMAND_RPC_IS_KEY_IMAGE_SPENT::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(is_key_image_spent);
      bool ok;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_IS_KEY_IMAGE_SPENT>(invoke_http_mode::JON, "/is_key_image_spent", req, res, ok))
        return ok;
  
      const bool restricted = m_restricted && ctx;
      const bool request_has_rpc_origin = ctx != NULL;
  
      if (restricted && req.key_images.size() > RESTRICTED_SPENT_KEY_IMAGES_COUNT)
      {
        res.status = "Too many key images queried in restricted mode";
        return true;
      }
  
      CHECK_PAYMENT_MIN1(req, res, req.key_images.size() * COST_PER_KEY_IMAGE, false);
  
      std::vector<crypto::key_image> key_images;
      for(const auto& ki_hex_str: req.key_images)
      {
        blobdata b;
        if(!string_tools::parse_hexstr_to_binbuff(ki_hex_str, b))
        {
          res.status = "Failed to parse hex representation of key image";
          return true;
        }
        if(b.size() != sizeof(crypto::key_image))
        {
          res.status = "Failed, size of data mismatch";
        }
        key_images.push_back(*reinterpret_cast<const crypto::key_image*>(b.data()));
      }
      std::vector<bool> spent_status;
      bool r = m_core.are_key_images_spent(key_images, spent_status);
      if(!r)
      {
        res.status = "Failed";
        return true;
      }
      res.spent_status.clear();
      for (size_t n = 0; n < spent_status.size(); ++n)
        res.spent_status.push_back(spent_status[n] ? COMMAND_RPC_IS_KEY_IMAGE_SPENT::SPENT_IN_BLOCKCHAIN : COMMAND_RPC_IS_KEY_IMAGE_SPENT::UNSPENT);
  
      // check the pool too
      std::vector<cryptonote::tx_info> txs;
      std::vector<cryptonote::spent_key_image_info> ki;
      r = m_core.get_pool_transactions_and_spent_keys_info(txs, ki, !request_has_rpc_origin || !restricted);
      if(!r)
      {
        res.status = "Failed";
        return true;
      }
      for (std::vector<cryptonote::spent_key_image_info>::const_iterator i = ki.begin(); i != ki.end(); ++i)
      {
        crypto::hash hash;
        crypto::key_image spent_key_image;
        if (parse_hash256(i->id_hash, hash))
        {
          memcpy(&spent_key_image, &hash, sizeof(hash)); // a bit dodgy, should be other parse functions somewhere
          for (size_t n = 0; n < res.spent_status.size(); ++n)
          {
            if (res.spent_status[n] == COMMAND_RPC_IS_KEY_IMAGE_SPENT::UNSPENT)
            {
              if (key_images[n] == spent_key_image)
              {
                res.spent_status[n] = COMMAND_RPC_IS_KEY_IMAGE_SPENT::SPENT_IN_POOL;
                break;
              }
            }
          }
        }
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_send_raw_tx(const COMMAND_RPC_SEND_RAW_TX::request& req, COMMAND_RPC_SEND_RAW_TX::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(send_raw_tx);
  
      {
        bool ok;
        use_bootstrap_daemon_if_necessary<COMMAND_RPC_SEND_RAW_TX>(invoke_http_mode::JON, "/sendrawtransaction", req, res, ok);
      }
  
      const bool restricted = m_restricted && ctx;
  
      bool skip_validation = false;
      if (!restricted)
      {
        boost::shared_lock<boost::shared_mutex> lock(m_bootstrap_daemon_mutex);
        if (m_should_use_bootstrap_daemon)
        {
          skip_validation = !check_core_ready();
        }
        else
        {
          CHECK_CORE_READY();
        }
      }
      else
      {
        CHECK_CORE_READY();
      }
  
      CHECK_PAYMENT_MIN1(req, res, COST_PER_TX_RELAY, false);
  
      std::string tx_blob;
      if(!string_tools::parse_hexstr_to_binbuff(req.tx_as_hex, tx_blob))
      {
        LOG_PRINT_L0("[on_send_raw_tx]: Failed to parse tx from hexbuff: " << req.tx_as_hex);
        res.status = "Failed";
        return true;
      }
  
      if (req.do_sanity_checks && !cryptonote::tx_sanity_check(tx_blob, m_core.get_blockchain_storage().get_num_mature_outputs(0)))
      {
        res.status = "Failed";
        res.reason = "Sanity check failed";
        res.sanity_check_failed = true;
        return true;
      }
      res.sanity_check_failed = false;
  
      if (!skip_validation)
      {
        tx_verification_context tvc{};
        if(!m_core.handle_incoming_tx({tx_blob, crypto::null_hash}, tvc, (req.do_not_relay ? relay_method::none : relay_method::local), false) || tvc.m_verifivation_failed)
        {
          res.status = "Failed";
          std::string reason = "";
          if ((res.low_mixin = tvc.m_low_mixin))
            add_reason(reason, "bad ring size");
          if ((res.double_spend = tvc.m_double_spend))
            add_reason(reason, "double spend");
          if ((res.invalid_input = tvc.m_invalid_input))
            add_reason(reason, "invalid input");
          if ((res.invalid_output = tvc.m_invalid_output))
            add_reason(reason, "invalid output");
          if ((res.too_big = tvc.m_too_big))
            add_reason(reason, "too big");
          if ((res.overspend = tvc.m_overspend))
            add_reason(reason, "overspend");
          if ((res.fee_too_low = tvc.m_fee_too_low))
            add_reason(reason, "fee too low");
          if ((res.too_few_outputs = tvc.m_too_few_outputs))
            add_reason(reason, "too few outputs");
          const std::string punctuation = reason.empty() ? "" : ": ";
          if (tvc.m_verifivation_failed)
          {
            LOG_PRINT_L0("[on_send_raw_tx]: tx verification failed" << punctuation << reason);
          }
          else
          {
            LOG_PRINT_L0("[on_send_raw_tx]: Failed to process tx" << punctuation << reason);
          }
          return true;
        }
  
        if(tvc.m_relay == relay_method::none)
        {
          LOG_PRINT_L0("[on_send_raw_tx]: tx accepted, but not relayed");
          res.reason = "Not relayed";
          res.not_relayed = true;
          res.status = CORE_RPC_STATUS_OK;
          return true;
        }
      }
  
      NOTIFY_NEW_TRANSACTIONS::request r;
      r.txs.push_back(std::move(tx_blob));
      m_core.get_protocol()->relay_transactions(r, boost::uuids::nil_uuid(), epee::net_utils::zone::invalid, relay_method::local);
      //TODO: make sure that tx has reached other nodes here, probably wait to receive reflections from other nodes
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_start_mining(const COMMAND_RPC_START_MINING::request& req, COMMAND_RPC_START_MINING::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(start_mining);
      CHECK_CORE_READY();
      cryptonote::address_parse_info info;
      if(!get_account_address_from_str(info, nettype(), req.miner_address))
      {
        res.status = "Failed, wrong address";
        LOG_PRINT_L0(res.status);
        return true;
      }
      if (info.is_subaddress)
      {
        res.status = "Mining to subaddress isn't supported yet";
        LOG_PRINT_L0(res.status);
        return true;
      }
  
      unsigned int concurrency_count = boost::thread::hardware_concurrency() * 4;
  
      // if we couldn't detect threads, set it to a ridiculously high number
      if(concurrency_count == 0)
      {
        concurrency_count = 257;
      }
  
      // if there are more threads requested than the hardware supports
      // then we fail and log that.
      if(req.threads_count > concurrency_count)
      {
        res.status = "Failed, too many threads relative to CPU cores.";
        LOG_PRINT_L0(res.status);
        return true;
      }
  
      cryptonote::miner &miner= m_core.get_miner();
      if (miner.is_mining())
      {
        res.status = "Already mining";
        return true;
      }
      if(!miner.start(info.address, static_cast<size_t>(req.threads_count), req.do_background_mining, req.ignore_battery))
      {
        res.status = "Failed, mining not started";
        LOG_PRINT_L0(res.status);
        return true;
      }
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_stop_mining(const COMMAND_RPC_STOP_MINING::request& req, COMMAND_RPC_STOP_MINING::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(stop_mining);
      cryptonote::miner &miner= m_core.get_miner();
      if(!miner.is_mining())
      {
        res.status = "Mining never started";
        LOG_PRINT_L0(res.status);
        return true;
      }
      if(!miner.stop())
      {
        res.status = "Failed, mining not stopped";
        LOG_PRINT_L0(res.status);
        return true;
      }
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_mining_status(const COMMAND_RPC_MINING_STATUS::request& req, COMMAND_RPC_MINING_STATUS::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(mining_status);
  
      const miner& lMiner = m_core.get_miner();
      res.active = lMiner.is_mining();
      res.is_background_mining_enabled = lMiner.get_is_background_mining_enabled();
      store_difficulty(m_core.get_blockchain_storage().get_difficulty_for_next_block(), res.difficulty, res.wide_difficulty, res.difficulty_top64);
      
      res.block_target = m_core.get_blockchain_storage().get_current_hard_fork_version() < 2 ? DIFFICULTY_TARGET_V1 : DIFFICULTY_TARGET_V2;
      if ( lMiner.is_mining() ) {
        res.speed = lMiner.get_speed();
        res.threads_count = lMiner.get_threads_count();
        res.block_reward = lMiner.get_block_reward();
      }
      const account_public_address& lMiningAdr = lMiner.get_mining_address();
      if (lMiner.is_mining() || lMiner.get_is_background_mining_enabled())
        res.address = get_account_address_as_str(nettype(), false, lMiningAdr);
      const uint8_t major_version = m_core.get_blockchain_storage().get_current_hard_fork_version();
      const unsigned variant = major_version >= 7 ? major_version - 6 : 0;
      switch (variant)
      {
        case 0: res.pow_algorithm = "Cryptonight"; break;
        case 1: res.pow_algorithm = "CNv1 (Cryptonight variant 1)"; break;
        case 2: case 3: res.pow_algorithm = "CNv2 (Cryptonight variant 2)"; break;
        case 4: case 5: res.pow_algorithm = "CNv4 (Cryptonight variant 4)"; break;
        case 6: case 7: case 8: case 9: res.pow_algorithm = "RandomX"; break;
        default: res.pow_algorithm = "RandomX"; break; // assumed
      }
      if (res.is_background_mining_enabled)
      {
        res.bg_idle_threshold = lMiner.get_idle_threshold();
        res.bg_min_idle_seconds = lMiner.get_min_idle_seconds();
        res.bg_ignore_battery = lMiner.get_ignore_battery();
        res.bg_target = lMiner.get_mining_target();
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_save_bc(const COMMAND_RPC_SAVE_BC::request& req, COMMAND_RPC_SAVE_BC::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(save_bc);
      if( !m_core.get_blockchain_storage().store_blockchain() )
      {
        res.status = "Error while storing blockchain";
        return true;
      }
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_peer_list(const COMMAND_RPC_GET_PEER_LIST::request& req, COMMAND_RPC_GET_PEER_LIST::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(get_peer_list);
      std::vector<nodetool::peerlist_entry> white_list;
      std::vector<nodetool::peerlist_entry> gray_list;
  
      if (req.public_only)
      {
        m_p2p.get_public_peerlist(gray_list, white_list);
      }
      else
      {
        m_p2p.get_peerlist(gray_list, white_list);
      }
  
      for (auto & entry : white_list)
      {
        if (!req.include_blocked && m_p2p.is_host_blocked(entry.adr, NULL))
          continue;
        if (entry.adr.get_type_id() == epee::net_utils::ipv4_network_address::get_type_id())
          res.white_list.emplace_back(entry.id, entry.adr.as<epee::net_utils::ipv4_network_address>().ip(),
              entry.adr.as<epee::net_utils::ipv4_network_address>().port(), entry.last_seen, entry.pruning_seed, entry.rpc_port, entry.rpc_credits_per_hash);
        else if (entry.adr.get_type_id() == epee::net_utils::ipv6_network_address::get_type_id())
          res.white_list.emplace_back(entry.id, entry.adr.as<epee::net_utils::ipv6_network_address>().host_str(),
              entry.adr.as<epee::net_utils::ipv6_network_address>().port(), entry.last_seen, entry.pruning_seed, entry.rpc_port, entry.rpc_credits_per_hash);
        else
          res.white_list.emplace_back(entry.id, entry.adr.str(), entry.last_seen, entry.pruning_seed, entry.rpc_port, entry.rpc_credits_per_hash);
      }
  
      for (auto & entry : gray_list)
      {
        if (!req.include_blocked && m_p2p.is_host_blocked(entry.adr, NULL))
          continue;
        if (entry.adr.get_type_id() == epee::net_utils::ipv4_network_address::get_type_id())
          res.gray_list.emplace_back(entry.id, entry.adr.as<epee::net_utils::ipv4_network_address>().ip(),
              entry.adr.as<epee::net_utils::ipv4_network_address>().port(), entry.last_seen, entry.pruning_seed, entry.rpc_port, entry.rpc_credits_per_hash);
        else if (entry.adr.get_type_id() == epee::net_utils::ipv6_network_address::get_type_id())
          res.gray_list.emplace_back(entry.id, entry.adr.as<epee::net_utils::ipv6_network_address>().host_str(),
              entry.adr.as<epee::net_utils::ipv6_network_address>().port(), entry.last_seen, entry.pruning_seed, entry.rpc_port, entry.rpc_credits_per_hash);
        else
          res.gray_list.emplace_back(entry.id, entry.adr.str(), entry.last_seen, entry.pruning_seed, entry.rpc_port, entry.rpc_credits_per_hash);
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_public_nodes(const COMMAND_RPC_GET_PUBLIC_NODES::request& req, COMMAND_RPC_GET_PUBLIC_NODES::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(get_public_nodes);
  
      COMMAND_RPC_GET_PEER_LIST::request peer_list_req;
      COMMAND_RPC_GET_PEER_LIST::response peer_list_res;
      peer_list_req.include_blocked = req.include_blocked;
      const bool success = on_get_peer_list(peer_list_req, peer_list_res, ctx);
      res.status = peer_list_res.status;
      if (!success)
      {      
        res.status = "Failed to get peer list";
        return true;
      }
      if (res.status != CORE_RPC_STATUS_OK)
      {
        return true;
      }
  
      const auto collect = [](const std::vector<peer> &peer_list, std::vector<public_node> &public_nodes)
      {
        for (const auto &entry : peer_list)
        {
          if (entry.rpc_port != 0)
          {
            public_nodes.emplace_back(entry);
          }
        }
      };
  
      if (req.white)
      {
        collect(peer_list_res.white_list, res.white);
      }
      if (req.gray)
      {
        collect(peer_list_res.gray_list, res.gray);
      }
  
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_set_log_hash_rate(const COMMAND_RPC_SET_LOG_HASH_RATE::request& req, COMMAND_RPC_SET_LOG_HASH_RATE::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(set_log_hash_rate);
      if(m_core.get_miner().is_mining())
      {
        m_core.get_miner().do_print_hashrate(req.visible);
        res.status = CORE_RPC_STATUS_OK;
      }
      else
      {
        res.status = CORE_RPC_STATUS_NOT_MINING;
      }
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_set_log_level(const COMMAND_RPC_SET_LOG_LEVEL::request& req, COMMAND_RPC_SET_LOG_LEVEL::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(set_log_level);
      if (req.level < 0 || req.level > 4)
      {
        res.status = "Error: log level not valid";
        return true;
      }
      mlog_set_log_level(req.level);
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_set_log_categories(const COMMAND_RPC_SET_LOG_CATEGORIES::request& req, COMMAND_RPC_SET_LOG_CATEGORIES::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(set_log_categories);
      mlog_set_log(req.categories.c_str());
      res.categories = mlog_get_categories();
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_transaction_pool(const COMMAND_RPC_GET_TRANSACTION_POOL::request& req, COMMAND_RPC_GET_TRANSACTION_POOL::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(get_transaction_pool);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_TRANSACTION_POOL>(invoke_http_mode::JON, "/get_transaction_pool", req, res, r))
        return r;
  
      CHECK_PAYMENT(req, res, 1);
  
      const bool restricted = m_restricted && ctx;
      const bool request_has_rpc_origin = ctx != NULL;
      const bool allow_sensitive = !request_has_rpc_origin || !restricted;
  
      size_t n_txes = m_core.get_pool_transactions_count(allow_sensitive);
      if (n_txes > 0)
      {
        CHECK_PAYMENT_SAME_TS(req, res, n_txes * COST_PER_TX);
        m_core.get_pool_transactions_and_spent_keys_info(res.transactions, res.spent_key_images, allow_sensitive);
        for (tx_info& txi : res.transactions)
          txi.tx_blob = epee::string_tools::buff_to_hex_nodelimer(txi.tx_blob);
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_transaction_pool_hashes_bin(const COMMAND_RPC_GET_TRANSACTION_POOL_HASHES_BIN::request& req, COMMAND_RPC_GET_TRANSACTION_POOL_HASHES_BIN::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(get_transaction_pool_hashes);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_TRANSACTION_POOL_HASHES_BIN>(invoke_http_mode::JON, "/get_transaction_pool_hashes.bin", req, res, r))
        return r;
  
      CHECK_PAYMENT(req, res, 1);
      db_rtxn_guard rtxn_guard(&m_core.get_blockchain_storage().get_db());
  
      const bool restricted = m_restricted && ctx;
      const bool request_has_rpc_origin = ctx != NULL;
      const bool allow_sensitive = !request_has_rpc_origin || !restricted;
  
      size_t n_txes = m_core.get_pool_transactions_count(allow_sensitive);
      if (n_txes > 0)
      {
        CHECK_PAYMENT_SAME_TS(req, res, n_txes * COST_PER_POOL_HASH);
        m_core.get_pool_transaction_hashes(res.tx_hashes, allow_sensitive);
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_transaction_pool_hashes(const COMMAND_RPC_GET_TRANSACTION_POOL_HASHES::request& req, COMMAND_RPC_GET_TRANSACTION_POOL_HASHES::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(get_transaction_pool_hashes);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_TRANSACTION_POOL_HASHES>(invoke_http_mode::JON, "/get_transaction_pool_hashes", req, res, r))
        return r;
  
      CHECK_PAYMENT(req, res, 1);
      db_rtxn_guard rtxn_guard(&m_core.get_blockchain_storage().get_db());
  
      const bool restricted = m_restricted && ctx;
      const bool request_has_rpc_origin = ctx != NULL;
      const bool allow_sensitive = !request_has_rpc_origin || !restricted;
  
      size_t n_txes = m_core.get_pool_transactions_count(allow_sensitive);
      if (n_txes > 0)
      {
        CHECK_PAYMENT_SAME_TS(req, res, n_txes * COST_PER_POOL_HASH);
        std::vector<crypto::hash> tx_hashes;
        m_core.get_pool_transaction_hashes(tx_hashes, allow_sensitive);
        res.tx_hashes.reserve(tx_hashes.size());
        for (const crypto::hash &tx_hash: tx_hashes)
          res.tx_hashes.push_back(epee::string_tools::pod_to_hex(tx_hash));
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_transaction_pool_stats(const COMMAND_RPC_GET_TRANSACTION_POOL_STATS::request& req, COMMAND_RPC_GET_TRANSACTION_POOL_STATS::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(get_transaction_pool_stats);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_TRANSACTION_POOL_STATS>(invoke_http_mode::JON, "/get_transaction_pool_stats", req, res, r))
        return r;
  
      CHECK_PAYMENT_MIN1(req, res, COST_PER_TX_POOL_STATS, false);
  
      const bool restricted = m_restricted && ctx;
      const bool request_has_rpc_origin = ctx != NULL;
      m_core.get_pool_transaction_stats(res.pool_stats, !request_has_rpc_origin || !restricted);
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_set_bootstrap_daemon(const COMMAND_RPC_SET_BOOTSTRAP_DAEMON::request& req, COMMAND_RPC_SET_BOOTSTRAP_DAEMON::response& res, const connection_context *ctx)
    {
      PERF_TIMER(on_set_bootstrap_daemon);
  
      boost::optional<epee::net_utils::http::login> credentials;
      if (!req.username.empty() || !req.password.empty())
      {
        credentials = epee::net_utils::http::login(req.username, req.password);
      }
  
      if (set_bootstrap_daemon(req.address, credentials, req.proxy))
      {
        res.status = CORE_RPC_STATUS_OK;
      }
      else
      {
        res.status = "Failed to set bootstrap daemon";
      }
  
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_stop_daemon(const COMMAND_RPC_STOP_DAEMON::request& req, COMMAND_RPC_STOP_DAEMON::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(stop_daemon);
      // FIXME: replace back to original m_p2p.send_stop_signal() after
      // investigating why that isn't working quite right.
      m_p2p.send_stop_signal();
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_getblockcount(const COMMAND_RPC_GETBLOCKCOUNT::request& req, COMMAND_RPC_GETBLOCKCOUNT::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(getblockcount);
      {
        boost::shared_lock<boost::shared_mutex> lock(m_bootstrap_daemon_mutex);
        if (m_should_use_bootstrap_daemon)
        {
          res.status = "This command is unsupported for bootstrap daemon";
          return true;
        }
      }
      res.count = m_core.get_current_blockchain_height();
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_getblockhash(const COMMAND_RPC_GETBLOCKHASH::request& req, COMMAND_RPC_GETBLOCKHASH::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(getblockhash);
      {
        boost::shared_lock<boost::shared_mutex> lock(m_bootstrap_daemon_mutex);
        if (m_should_use_bootstrap_daemon)
        {
          res = "This command is unsupported for bootstrap daemon";
          return true;
        }
      }
      if(req.size() != 1)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_WRONG_PARAM;
        error_resp.message = "Wrong parameters, expected height";
        return false;
      }
      db_rtxn_guard rtxn_guard(&m_core.get_blockchain_storage().get_db());
      uint64_t h = req[0];
      uint64_t blockchain_height = m_core.get_current_blockchain_height();
      if(blockchain_height <= h)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_TOO_BIG_HEIGHT;
        error_resp.message = std::string("Requested block height: ") + std::to_string(h) + " greater than current top block height: " +  std::to_string(blockchain_height - 1);
        return false;
      }
      res = string_tools::pod_to_hex(m_core.get_block_id_by_height(h));
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    // equivalent of strstr, but with arbitrary bytes (ie, NULs)
    // This does not differentiate between "not found" and "found at offset 0"
    size_t slow_memmem(const void* start_buff, size_t buflen,const void* pat,size_t patlen)
    {
      const void* buf = start_buff;
      const void* end=(const char*)buf+buflen;
      if (patlen > buflen || patlen == 0) return 0;
      while(buflen>0 && (buf=memchr(buf,((const char*)pat)[0],buflen-patlen+1)))
      {
        if(memcmp(buf,pat,patlen)==0)
          return (const char*)buf - (const char*)start_buff;
        buf=(const char*)buf+1;
        buflen = (const char*)end - (const char*)buf;
      }
      return 0;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::get_block_template(const account_public_address &address, const crypto::hash *prev_block, const cryptonote::blobdata &extra_nonce, size_t &reserved_offset, cryptonote::difficulty_type  &difficulty, uint64_t &height, uint64_t &expected_reward, block &b, uint64_t &seed_height, crypto::hash &seed_hash, crypto::hash &next_seed_hash, epee::json_rpc::error &error_resp)
    {
      b = boost::value_initialized<cryptonote::block>();
      if(!m_core.get_block_template(b, prev_block, address, difficulty, height, expected_reward, extra_nonce, seed_height, seed_hash))
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = "Internal error: failed to create block template";
        LOG_ERROR("Failed to create block template");
        return false;
      }
      blobdata block_blob = t_serializable_object_to_blob(b);
      crypto::public_key tx_pub_key = cryptonote::get_tx_pub_key_from_extra(b.miner_tx);
      if(tx_pub_key == crypto::null_pkey)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = "Internal error: failed to create block template";
        LOG_ERROR("Failed to get tx pub key in coinbase extra");
        return false;
      }
  
      uint64_t next_height;
      crypto::rx_seedheights(height, &seed_height, &next_height);
      if (next_height != seed_height)
        next_seed_hash = m_core.get_block_id_by_height(next_height);
      else
        next_seed_hash = seed_hash;
  
      if (extra_nonce.empty())
      {
        reserved_offset = 0;
        return true;
      }
  
      reserved_offset = slow_memmem((void*)block_blob.data(), block_blob.size(), &tx_pub_key, sizeof(tx_pub_key));
      if(!reserved_offset)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = "Internal error: failed to create block template";
        LOG_ERROR("Failed to find tx pub key in blockblob");
        return false;
      }
      reserved_offset += sizeof(tx_pub_key) + 2; //2 bytes: tag for TX_EXTRA_NONCE(1 byte), counter in TX_EXTRA_NONCE(1 byte)
      if(reserved_offset + extra_nonce.size() > block_blob.size())
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = "Internal error: failed to create block template";
        LOG_ERROR("Failed to calculate offset for ");
        return false;
      }
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_getblocktemplate(const COMMAND_RPC_GETBLOCKTEMPLATE::request& req, COMMAND_RPC_GETBLOCKTEMPLATE::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(getblocktemplate);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GETBLOCKTEMPLATE>(invoke_http_mode::JON_RPC, "getblocktemplate", req, res, r))
        return r;
  
      if(!check_core_ready())
      {
        error_resp.code = CORE_RPC_ERROR_CODE_CORE_BUSY;
        error_resp.message = "Core is busy";
        return false;
      }
  
      if(req.reserve_size > 255)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_TOO_BIG_RESERVE_SIZE;
        error_resp.message = "Too big reserved size, maximum 255";
        return false;
      }
  
      if(req.reserve_size && !req.extra_nonce.empty())
      {
        error_resp.code = CORE_RPC_ERROR_CODE_WRONG_PARAM;
        error_resp.message = "Cannot specify both a reserve_size and an extra_nonce";
        return false;
      }
  
      if(req.extra_nonce.size() > 510)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_TOO_BIG_RESERVE_SIZE;
        error_resp.message = "Too big extra_nonce size, maximum 510 hex chars";
        return false;
      }
  
      cryptonote::address_parse_info info;
  
      if(!req.wallet_address.size() || !cryptonote::get_account_address_from_str(info, nettype(), req.wallet_address))
      {
        error_resp.code = CORE_RPC_ERROR_CODE_WRONG_WALLET_ADDRESS;
        error_resp.message = "Failed to parse wallet address";
        return false;
      }
      if (info.is_subaddress)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_MINING_TO_SUBADDRESS;
        error_resp.message = "Mining to subaddress is not supported yet";
        return false;
      }
  
      block b;
      cryptonote::blobdata blob_reserve;
      size_t reserved_offset;
      if(!req.extra_nonce.empty())
      {
        if(!string_tools::parse_hexstr_to_binbuff(req.extra_nonce, blob_reserve))
        {
          error_resp.code = CORE_RPC_ERROR_CODE_WRONG_PARAM;
          error_resp.message = "Parameter extra_nonce should be a hex string";
          return false;
        }
      }
      else
        blob_reserve.resize(req.reserve_size, 0);
      cryptonote::difficulty_type wdiff;
      crypto::hash prev_block;
      if (!req.prev_block.empty())
      {
        if (!epee::string_tools::hex_to_pod(req.prev_block, prev_block))
        {
          error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
          error_resp.message = "Invalid prev_block";
          return false;
        }
      }
      db_rtxn_guard rtxn_guard(&m_core.get_blockchain_storage().get_db());
      crypto::hash seed_hash, next_seed_hash;
      if (!get_block_template(info.address, req.prev_block.empty() ? NULL : &prev_block, blob_reserve, reserved_offset, wdiff, res.height, res.expected_reward, b, res.seed_height, seed_hash, next_seed_hash, error_resp))
        return false;
      if (b.major_version >= RX_BLOCK_VERSION)
      {
        res.seed_hash = string_tools::pod_to_hex(seed_hash);
        if (seed_hash != next_seed_hash)
          res.next_seed_hash = string_tools::pod_to_hex(next_seed_hash);
      }
  
      res.reserved_offset = reserved_offset;
      store_difficulty(wdiff, res.difficulty, res.wide_difficulty, res.difficulty_top64);
      blobdata block_blob = t_serializable_object_to_blob(b);
      blobdata hashing_blob = get_block_hashing_blob(b);
      res.prev_hash = string_tools::pod_to_hex(b.prev_id);
      res.blocktemplate_blob = string_tools::buff_to_hex_nodelimer(block_blob);
      res.blockhashing_blob =  string_tools::buff_to_hex_nodelimer(hashing_blob);
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_getminerdata(const COMMAND_RPC_GETMINERDATA::request& req, COMMAND_RPC_GETMINERDATA::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      if(!check_core_ready())
      {
        error_resp.code = CORE_RPC_ERROR_CODE_CORE_BUSY;
        error_resp.message = "Core is busy";
        return false;
      }
  
      crypto::hash prev_id, seed_hash;
      difficulty_type difficulty;
  
      std::vector<tx_block_template_backlog_entry> tx_backlog;
      if (!m_core.get_miner_data(res.major_version, res.height, prev_id, seed_hash, difficulty, res.median_weight, res.already_generated_coins, tx_backlog))
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = "Internal error: failed to get miner data";
        LOG_ERROR("Failed to get miner data");
        return false;
      }
  
      res.tx_backlog.clear();
      res.tx_backlog.reserve(tx_backlog.size());
  
      for (const auto& entry : tx_backlog)
      {
        res.tx_backlog.emplace_back(COMMAND_RPC_GETMINERDATA::response::tx_backlog_entry{string_tools::pod_to_hex(entry.id), entry.weight, entry.fee});
      }
  
      res.prev_id = string_tools::pod_to_hex(prev_id);
      res.seed_hash = string_tools::pod_to_hex(seed_hash);
      res.difficulty = cryptonote::hex(difficulty);
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_calcpow(const COMMAND_RPC_CALCPOW::request& req, COMMAND_RPC_CALCPOW::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(calcpow);
  
      blobdata blockblob;
      if(!string_tools::parse_hexstr_to_binbuff(req.block_blob, blockblob))
      {
        error_resp.code = CORE_RPC_ERROR_CODE_WRONG_BLOCKBLOB;
        error_resp.message = "Wrong block blob";
        return false;
      }
      if(!m_core.check_incoming_block_size(blockblob))
      {
        error_resp.code = CORE_RPC_ERROR_CODE_WRONG_BLOCKBLOB_SIZE;
        error_resp.message = "Block blob size is too big, rejecting block";
        return false;
      }
      crypto::hash seed_hash, pow_hash;
      std::string buf;
      if(req.seed_hash.size())
      {
        if (!string_tools::parse_hexstr_to_binbuff(req.seed_hash, buf) ||
          buf.size() != sizeof(crypto::hash))
        {
          error_resp.code = CORE_RPC_ERROR_CODE_WRONG_PARAM;
          error_resp.message = "Wrong seed hash";
          return false;
        }
        buf.copy(reinterpret_cast<char *>(&seed_hash), sizeof(crypto::hash));
      }
  
      cryptonote::get_block_longhash(&(m_core.get_blockchain_storage()), blockblob, pow_hash, req.height,
        req.major_version, req.seed_hash.size() ? &seed_hash : NULL, 0);
      res = string_tools::pod_to_hex(pow_hash);
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_add_aux_pow(const COMMAND_RPC_ADD_AUX_POW::request& req, COMMAND_RPC_ADD_AUX_POW::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(add_aux_pow);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_ADD_AUX_POW>(invoke_http_mode::JON_RPC, "add_aux_pow", req, res, r))
        return r;
  
      if (req.aux_pow.empty())
      {
        error_resp.code = CORE_RPC_ERROR_CODE_WRONG_PARAM;
        error_resp.message = "Empty aux pow hash vector";
        return false;
      }
  
      crypto::hash merkle_root;
      size_t merkle_tree_depth = 0;
      std::vector<std::pair<crypto::hash, crypto::hash>> aux_pow;
      std::vector<crypto::hash> aux_pow_raw;
      aux_pow.reserve(req.aux_pow.size());
      aux_pow_raw.reserve(req.aux_pow.size());
      for (const auto &s: req.aux_pow)
      {
        aux_pow.push_back({});
        if (!epee::string_tools::hex_to_pod(s.id, aux_pow.back().first))
        {
          error_resp.code = CORE_RPC_ERROR_CODE_WRONG_PARAM;
          error_resp.message = "Invalid aux pow id";
          return false;
        }
        if (!epee::string_tools::hex_to_pod(s.hash, aux_pow.back().second))
        {
          error_resp.code = CORE_RPC_ERROR_CODE_WRONG_PARAM;
          error_resp.message = "Invalid aux pow hash";
          return false;
        }
        aux_pow_raw.push_back(aux_pow.back().second);
      }
  
      size_t path_domain = 1;
      while ((1u << path_domain) < aux_pow.size())
        ++path_domain;
      uint32_t nonce;
      const uint32_t max_nonce = 65535;
      bool collision = true;
      for (nonce = 0; nonce <= max_nonce; ++nonce)
      {
        std::vector<bool> slots(aux_pow.size(), false);
        collision = false;
        for (size_t idx = 0; idx < aux_pow.size(); ++idx)
        {
          const uint32_t slot = cryptonote::get_aux_slot(aux_pow[idx].first, nonce, aux_pow.size());
          if (slot >= aux_pow.size())
          {
            error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
            error_resp.message = "Computed slot is out of range";
            return false;
          }
          if (slots[slot])
          {
            collision = true;
            break;
          }
          slots[slot] = true;
        }
        if (!collision)
          break;
      }
      if (collision)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = "Failed to find a suitable nonce";
        return false;
      }
  
      crypto::tree_hash((const char(*)[crypto::HASH_SIZE])aux_pow_raw.data(), aux_pow_raw.size(), merkle_root.data);
      res.merkle_root = epee::string_tools::pod_to_hex(merkle_root);
      res.merkle_tree_depth = cryptonote::encode_mm_depth(aux_pow.size(), nonce);
  
      blobdata blocktemplate_blob;
      if (!epee::string_tools::parse_hexstr_to_binbuff(req.blocktemplate_blob, blocktemplate_blob))
      {
        error_resp.code = CORE_RPC_ERROR_CODE_WRONG_PARAM;
        error_resp.message = "Invalid blocktemplate_blob";
        return false;
      }
  
      block b;
      if (!parse_and_validate_block_from_blob(blocktemplate_blob, b))
      {
        error_resp.code = CORE_RPC_ERROR_CODE_WRONG_BLOCKBLOB;
        error_resp.message = "Wrong blocktemplate_blob";
        return false;
      }
  
      if (!remove_field_from_tx_extra(b.miner_tx.extra, typeid(cryptonote::tx_extra_merge_mining_tag)))
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = "Error removing existing merkle root";
        return false;
      }
      if (!add_mm_merkle_root_to_tx_extra(b.miner_tx.extra, merkle_root, merkle_tree_depth))
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = "Error adding merkle root";
        return false;
      }
      b.invalidate_hashes();
      b.miner_tx.invalidate_hashes();
  
      const blobdata block_blob = t_serializable_object_to_blob(b);
      const blobdata hashing_blob = get_block_hashing_blob(b);
  
      res.blocktemplate_blob = string_tools::buff_to_hex_nodelimer(block_blob);
      res.blockhashing_blob = string_tools::buff_to_hex_nodelimer(hashing_blob);
      res.aux_pow = req.aux_pow;
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_submitblock(const COMMAND_RPC_SUBMITBLOCK::request& req, COMMAND_RPC_SUBMITBLOCK::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(submitblock);
      {
        boost::shared_lock<boost::shared_mutex> lock(m_bootstrap_daemon_mutex);
        if (m_should_use_bootstrap_daemon)
        {
          error_resp.code = CORE_RPC_ERROR_CODE_UNSUPPORTED_BOOTSTRAP;
          error_resp.message = "This command is unsupported for bootstrap daemon";
          return false;
        }
      }
      CHECK_CORE_READY();
      if(req.size()!=1)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_WRONG_PARAM;
        error_resp.message = "Wrong param";
        return false;
      }
      blobdata blockblob;
      if(!string_tools::parse_hexstr_to_binbuff(req[0], blockblob))
      {
        error_resp.code = CORE_RPC_ERROR_CODE_WRONG_BLOCKBLOB;
        error_resp.message = "Wrong block blob";
        return false;
      }
      
      // Fixing of high orphan issue for most pools
      // Thanks Boolberry!
      block b;
      if(!parse_and_validate_block_from_blob(blockblob, b))
      {
        error_resp.code = CORE_RPC_ERROR_CODE_WRONG_BLOCKBLOB;
        error_resp.message = "Wrong block blob";
        return false;
      }
  
      // Fix from Boolberry neglects to check block
      // size, do that with the function below
      if(!m_core.check_incoming_block_size(blockblob))
      {
        error_resp.code = CORE_RPC_ERROR_CODE_WRONG_BLOCKBLOB_SIZE;
        error_resp.message = "Block bloc size is too big, rejecting block";
        return false;
      }
  
      block_verification_context bvc;
      if(!m_core.handle_block_found(b, bvc))
      {
        error_resp.code = CORE_RPC_ERROR_CODE_BLOCK_NOT_ACCEPTED;
        error_resp.message = "Block not accepted";
        return false;
      }
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_generateblocks(const COMMAND_RPC_GENERATEBLOCKS::request& req, COMMAND_RPC_GENERATEBLOCKS::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(generateblocks);
  
      CHECK_CORE_READY();
      
      res.status = CORE_RPC_STATUS_OK;
  
      if(m_core.get_nettype() != FAKECHAIN)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_REGTEST_REQUIRED;
        error_resp.message = "Regtest required when generating blocks";      
        return false;
      }
  
      COMMAND_RPC_GETBLOCKTEMPLATE::request template_req;
      COMMAND_RPC_GETBLOCKTEMPLATE::response template_res;
      COMMAND_RPC_SUBMITBLOCK::request submit_req;
      COMMAND_RPC_SUBMITBLOCK::response submit_res;
  
      template_req.reserve_size = 1;
      template_req.wallet_address = req.wallet_address;
      template_req.prev_block = req.prev_block;
      submit_req.push_back(std::string{});
      res.height = m_core.get_blockchain_storage().get_current_blockchain_height();
  
      for(size_t i = 0; i < req.amount_of_blocks; i++)
      {
        bool r = on_getblocktemplate(template_req, template_res, error_resp, ctx);
        res.status = template_res.status;
        template_req.prev_block.clear();
        
        if (!r) return false;
  
        blobdata blockblob;
        if(!string_tools::parse_hexstr_to_binbuff(template_res.blocktemplate_blob, blockblob))
        {
          error_resp.code = CORE_RPC_ERROR_CODE_WRONG_BLOCKBLOB;
          error_resp.message = "Wrong block blob";
          return false;
        }
        block b;
        if(!parse_and_validate_block_from_blob(blockblob, b))
        {
          error_resp.code = CORE_RPC_ERROR_CODE_WRONG_BLOCKBLOB;
          error_resp.message = "Wrong block blob";
          return false;
        }
        b.nonce = req.starting_nonce;
        crypto::hash seed_hash = crypto::null_hash;
        if (b.major_version >= RX_BLOCK_VERSION && !epee::string_tools::hex_to_pod(template_res.seed_hash, seed_hash))
        {
          error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
          error_resp.message = "Error converting seed hash";
          return false;
        }
        miner::find_nonce_for_given_block([this](const cryptonote::block &b, uint64_t height, const crypto::hash *seed_hash, unsigned int threads, crypto::hash &hash) {
          return cryptonote::get_block_longhash(&(m_core.get_blockchain_storage()), b, hash, height, seed_hash, threads);
        }, b, template_res.difficulty, template_res.height, &seed_hash);
  
        submit_req.front() = string_tools::buff_to_hex_nodelimer(block_to_blob(b));
        r = on_submitblock(submit_req, submit_res, error_resp, ctx);
        res.status = submit_res.status;
  
        if (!r) return false;
  
        res.blocks.push_back(epee::string_tools::pod_to_hex(get_block_hash(b)));
        template_req.prev_block = res.blocks.back();
        res.height = template_res.height;
      }
  
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    uint64_t core_rpc_server::get_block_reward(const block& blk)
    {
      uint64_t reward = 0;
      for(const tx_out& out: blk.miner_tx.vout)
      {
        reward += out.amount;
      }
      return reward;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::fill_block_header_response(const block& blk, bool orphan_status, uint64_t height, const crypto::hash& hash, block_header_response& response, bool fill_pow_hash)
    {
      PERF_TIMER(fill_block_header_response);
      response.major_version = blk.major_version;
      response.minor_version = blk.minor_version;
      response.timestamp = blk.timestamp;
      response.prev_hash = string_tools::pod_to_hex(blk.prev_id);
      response.nonce = blk.nonce;
      response.orphan_status = orphan_status;
      response.height = height;
      response.depth = m_core.get_current_blockchain_height() - height - 1;
      response.hash = string_tools::pod_to_hex(hash);
      store_difficulty(m_core.get_blockchain_storage().block_difficulty(height),
          response.difficulty, response.wide_difficulty, response.difficulty_top64);
      store_difficulty(m_core.get_blockchain_storage().get_db().get_block_cumulative_difficulty(height),
          response.cumulative_difficulty, response.wide_cumulative_difficulty, response.cumulative_difficulty_top64);
      response.reward = get_block_reward(blk);
      response.block_size = response.block_weight = m_core.get_blockchain_storage().get_db().get_block_weight(height);
      response.num_txes = blk.tx_hashes.size();
      response.pow_hash = fill_pow_hash ? string_tools::pod_to_hex(get_block_longhash(&(m_core.get_blockchain_storage()), blk, height, 0)) : "";
      response.long_term_weight = m_core.get_blockchain_storage().get_db().get_block_long_term_weight(height);
      response.miner_tx_hash = string_tools::pod_to_hex(cryptonote::get_transaction_hash(blk.miner_tx));
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    template <typename COMMAND_TYPE>
    bool core_rpc_server::use_bootstrap_daemon_if_necessary(const invoke_http_mode &mode, const std::string &command_name, const typename COMMAND_TYPE::request& req, typename COMMAND_TYPE::response& res, bool &r)
    {
      res.untrusted = false;
  
      boost::upgrade_lock<boost::shared_mutex> upgrade_lock(m_bootstrap_daemon_mutex);
  
      if (m_bootstrap_daemon.get() == nullptr)
      {
        return false;
      }
  
      if (!m_should_use_bootstrap_daemon)
      {
        MINFO("The local daemon is fully synced. Not switching back to the bootstrap daemon");
        return false;
      }
  
      auto current_time = std::chrono::system_clock::now();
      if (current_time - m_bootstrap_height_check_time > std::chrono::seconds(30))  // update every 30s
      {
        {
          boost::upgrade_to_unique_lock<boost::shared_mutex> lock(upgrade_lock);
          m_bootstrap_height_check_time = current_time;
        }
  
        boost::optional<std::pair<uint64_t, uint64_t>> bootstrap_daemon_height_info = m_bootstrap_daemon->get_height();
        if (!bootstrap_daemon_height_info)
        {
          MERROR("Failed to fetch bootstrap daemon height");
          return false;
        }
  
        const uint64_t bootstrap_daemon_height = bootstrap_daemon_height_info->first;
        const uint64_t bootstrap_daemon_target_height = bootstrap_daemon_height_info->second;
        if (bootstrap_daemon_height < bootstrap_daemon_target_height)
        {
          MINFO("Bootstrap daemon is out of sync");
          return m_bootstrap_daemon->handle_result(false, {});
        }
  
        if (!m_p2p.get_payload_object().no_sync())
        {
          uint64_t top_height = m_core.get_current_blockchain_height();
          m_should_use_bootstrap_daemon = top_height + 10 < bootstrap_daemon_height;
          MINFO((m_should_use_bootstrap_daemon ? "Using" : "Not using") << " the bootstrap daemon (our height: " << top_height << ", bootstrap daemon's height: " << bootstrap_daemon_height << ")");
  
          if (!m_should_use_bootstrap_daemon)
            return false;
        }
      }
  
      if (mode == invoke_http_mode::JON)
      {
        r = m_bootstrap_daemon->invoke_http_json(command_name, req, res);
      }
      else if (mode == invoke_http_mode::BIN)
      {
        r = m_bootstrap_daemon->invoke_http_bin(command_name, req, res);
      }
      else if (mode == invoke_http_mode::JON_RPC)
      {
        r = m_bootstrap_daemon->invoke_http_json_rpc(command_name, req, res);
      }
      else
      {
        MERROR("Unknown invoke_http_mode: " << mode);
        return false;
      }
  
      {
        boost::upgrade_to_unique_lock<boost::shared_mutex> lock(upgrade_lock);
        m_was_bootstrap_ever_used = true;
      }
  
      if (r && res.status != CORE_RPC_STATUS_PAYMENT_REQUIRED && res.status != CORE_RPC_STATUS_OK)
      {
        MINFO("Failing RPC " << command_name << " due to peer return status " << res.status);
        r = false;
      }
      res.untrusted = true;
      return r;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_last_block_header(const COMMAND_RPC_GET_LAST_BLOCK_HEADER::request& req, COMMAND_RPC_GET_LAST_BLOCK_HEADER::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(get_last_block_header);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_LAST_BLOCK_HEADER>(invoke_http_mode::JON_RPC, "getlastblockheader", req, res, r))
        return r;
  
      CHECK_CORE_READY();
      CHECK_PAYMENT_MIN1(req, res, COST_PER_BLOCK_HEADER, false);
      db_rtxn_guard rtxn_guard(&m_core.get_blockchain_storage().get_db());
      uint64_t last_block_height;
      crypto::hash last_block_hash;
      m_core.get_blockchain_top(last_block_height, last_block_hash);
      block last_block;
      bool have_last_block = m_core.get_block_by_hash(last_block_hash, last_block);
      if (!have_last_block)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = "Internal error: can't get last block.";
        return false;
      }
      const bool restricted = m_restricted && ctx;
      bool response_filled = fill_block_header_response(last_block, false, last_block_height, last_block_hash, res.block_header, req.fill_pow_hash && !restricted);
      if (!response_filled)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = "Internal error: can't produce valid response.";
        return false;
      }
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_block_header_by_hash(const COMMAND_RPC_GET_BLOCK_HEADER_BY_HASH::request& req, COMMAND_RPC_GET_BLOCK_HEADER_BY_HASH::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(get_block_header_by_hash);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_BLOCK_HEADER_BY_HASH>(invoke_http_mode::JON_RPC, "getblockheaderbyhash", req, res, r))
        return r;
  
      CHECK_PAYMENT_MIN1(req, res, COST_PER_BLOCK_HEADER, false);
  
      const bool restricted = m_restricted && ctx;
      if (restricted && req.hashes.size() > RESTRICTED_BLOCK_COUNT)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_RESTRICTED;
        error_resp.message = "Too many block headers requested in restricted mode";
        return false;
      }
  
      db_rtxn_guard rtxn_guard(&m_core.get_blockchain_storage().get_db());
  
      auto get = [this](const std::string &hash, bool fill_pow_hash, block_header_response &block_header, bool restricted, epee::json_rpc::error& error_resp) -> bool {
        crypto::hash block_hash;
        bool hash_parsed = parse_hash256(hash, block_hash);
        if(!hash_parsed)
        {
          error_resp.code = CORE_RPC_ERROR_CODE_WRONG_PARAM;
          error_resp.message = "Failed to parse hex representation of block hash. Hex = " + hash + '.';
          return false;
        }
        block blk;
        bool orphan = false;
        bool have_block = m_core.get_block_by_hash(block_hash, blk, &orphan);
        if (!have_block)
        {
          error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
          error_resp.message = "Internal error: can't get block by hash. Hash = " + hash + '.';
          return false;
        }
        if (blk.miner_tx.vin.size() != 1 || blk.miner_tx.vin.front().type() != typeid(txin_gen))
        {
          error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
          error_resp.message = "Internal error: coinbase transaction in the block has the wrong type";
          return false;
        }
        uint64_t block_height = boost::get<txin_gen>(blk.miner_tx.vin.front()).height;
        bool response_filled = fill_block_header_response(blk, orphan, block_height, block_hash, block_header, fill_pow_hash && !restricted);
        if (!response_filled)
        {
          error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
          error_resp.message = "Internal error: can't produce valid response.";
          return false;
        }
        return true;
      };
  
      if (!req.hash.empty())
      {
        if (!get(req.hash, req.fill_pow_hash, res.block_header, restricted, error_resp))
          return false;
      }
      res.block_headers.reserve(req.hashes.size());
      for (const std::string &hash: req.hashes)
      {
        res.block_headers.push_back({});
        if (!get(hash, req.fill_pow_hash, res.block_headers.back(), restricted, error_resp))
          return false;
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_block_headers_range(const COMMAND_RPC_GET_BLOCK_HEADERS_RANGE::request& req, COMMAND_RPC_GET_BLOCK_HEADERS_RANGE::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(get_block_headers_range);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_BLOCK_HEADERS_RANGE>(invoke_http_mode::JON_RPC, "getblockheadersrange", req, res, r))
        return r;
  
      const bool restricted = m_restricted && ctx;
      if (restricted && req.end_height - req.start_height > RESTRICTED_BLOCK_HEADER_RANGE)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_RESTRICTED;
        error_resp.message = "Too many block headers requested.";
        return false;
      }
  
      CHECK_PAYMENT_MIN1(req, res, (req.end_height - req.start_height + 1) * COST_PER_BLOCK_HEADER, false);
      db_rtxn_guard rtxn_guard(&m_core.get_blockchain_storage().get_db());
  
      const uint64_t bc_height = m_core.get_current_blockchain_height();
      if (req.start_height >= bc_height || req.end_height >= bc_height || req.start_height > req.end_height)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_TOO_BIG_HEIGHT;
        error_resp.message = "Invalid start/end heights.";
        return false;
      }
  
      for (uint64_t h = req.start_height; h <= req.end_height; ++h)
      {
        crypto::hash block_hash = m_core.get_block_id_by_height(h);
        block blk;
        bool have_block = m_core.get_block_by_hash(block_hash, blk);
        if (!have_block)
        {
          error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
          error_resp.message = "Internal error: can't get block by height. Height = " + boost::lexical_cast<std::string>(h) + ". Hash = " + epee::string_tools::pod_to_hex(block_hash) + '.';
          return false;
        }
        if (blk.miner_tx.vin.size() != 1 || blk.miner_tx.vin.front().type() != typeid(txin_gen))
        {
          error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
          error_resp.message = "Internal error: coinbase transaction in the block has the wrong type";
          return false;
        }
        uint64_t block_height = boost::get<txin_gen>(blk.miner_tx.vin.front()).height;
        if (block_height != h)
        {
          error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
          error_resp.message = "Internal error: coinbase transaction in the block has the wrong height";
          return false;
        }
        res.headers.push_back(block_header_response());
        bool response_filled = fill_block_header_response(blk, false, block_height, block_hash, res.headers.back(), req.fill_pow_hash && !restricted);
        if (!response_filled)
        {
          error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
          error_resp.message = "Internal error: can't produce valid response.";
          return false;
        }
      }
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_block_header_by_height(const COMMAND_RPC_GET_BLOCK_HEADER_BY_HEIGHT::request& req, COMMAND_RPC_GET_BLOCK_HEADER_BY_HEIGHT::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(get_block_header_by_height);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_BLOCK_HEADER_BY_HEIGHT>(invoke_http_mode::JON_RPC, "getblockheaderbyheight", req, res, r))
        return r;
  
      db_rtxn_guard rtxn_guard(&m_core.get_blockchain_storage().get_db());
      uint64_t blockchain_height = m_core.get_current_blockchain_height();
      if(blockchain_height <= req.height)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_TOO_BIG_HEIGHT;
        error_resp.message = std::string("Requested block height: ") + std::to_string(req.height) + " greater than current top block height: " +  std::to_string(blockchain_height - 1);
        return false;
      }
      CHECK_PAYMENT_MIN1(req, res, COST_PER_BLOCK_HEADER, false);
      crypto::hash block_hash = m_core.get_block_id_by_height(req.height);
      block blk;
      bool have_block = m_core.get_block_by_hash(block_hash, blk);
      if (!have_block)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = "Internal error: can't get block by height. Height = " + std::to_string(req.height) + '.';
        return false;
      }
      const bool restricted = m_restricted && ctx;
      bool response_filled = fill_block_header_response(blk, false, req.height, block_hash, res.block_header, req.fill_pow_hash && !restricted);
      if (!response_filled)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = "Internal error: can't produce valid response.";
        return false;
      }
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_block(const COMMAND_RPC_GET_BLOCK::request& req, COMMAND_RPC_GET_BLOCK::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(get_block);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_BLOCK>(invoke_http_mode::JON_RPC, "getblock", req, res, r))
        return r;
  
      CHECK_PAYMENT_MIN1(req, res, COST_PER_BLOCK, false);
      db_rtxn_guard rtxn_guard(&m_core.get_blockchain_storage().get_db());
  
      crypto::hash block_hash;
      if (!req.hash.empty())
      {
        bool hash_parsed = parse_hash256(req.hash, block_hash);
        if(!hash_parsed)
        {
          error_resp.code = CORE_RPC_ERROR_CODE_WRONG_PARAM;
          error_resp.message = "Failed to parse hex representation of block hash. Hex = " + req.hash + '.';
          return false;
        }
      }
      else
      {
        uint64_t blockchain_height = m_core.get_current_blockchain_height();
        if(blockchain_height <= req.height)
        {
          error_resp.code = CORE_RPC_ERROR_CODE_TOO_BIG_HEIGHT;
          error_resp.message = std::string("Requested block height: ") + std::to_string(req.height) + " greater than current top block height: " +  std::to_string(blockchain_height - 1);
          return false;
        }
        block_hash = m_core.get_block_id_by_height(req.height);
      }
      block blk;
      bool orphan = false;
      bool have_block = m_core.get_block_by_hash(block_hash, blk, &orphan);
      if (!have_block)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = "Internal error: can't get block by hash. Hash = " + req.hash + '.';
        return false;
      }
      if (blk.miner_tx.vin.size() != 1 || blk.miner_tx.vin.front().type() != typeid(txin_gen))
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = "Internal error: coinbase transaction in the block has the wrong type";
        return false;
      }
      uint64_t block_height = boost::get<txin_gen>(blk.miner_tx.vin.front()).height;
      const bool restricted = m_restricted && ctx;
      bool response_filled = fill_block_header_response(blk, orphan, block_height, block_hash, res.block_header, req.fill_pow_hash && !restricted);
      if (!response_filled)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = "Internal error: can't produce valid response.";
        return false;
      }
      res.miner_tx_hash = res.block_header.miner_tx_hash;
      for (size_t n = 0; n < blk.tx_hashes.size(); ++n)
      {
        res.tx_hashes.push_back(epee::string_tools::pod_to_hex(blk.tx_hashes[n]));
      }
      res.blob = string_tools::buff_to_hex_nodelimer(t_serializable_object_to_blob(blk));
      res.json = obj_to_json_str(blk);
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_connections(const COMMAND_RPC_GET_CONNECTIONS::request& req, COMMAND_RPC_GET_CONNECTIONS::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(get_connections);
  
      res.connections = m_p2p.get_payload_object().get_connections();
  
      res.status = CORE_RPC_STATUS_OK;
  
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_info_json(const COMMAND_RPC_GET_INFO::request& req, COMMAND_RPC_GET_INFO::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      if (!on_get_info(req, res, ctx) || res.status != CORE_RPC_STATUS_OK)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = res.status;
        return false;
      }
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_hard_fork_info(const COMMAND_RPC_HARD_FORK_INFO::request& req, COMMAND_RPC_HARD_FORK_INFO::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(hard_fork_info);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_HARD_FORK_INFO>(invoke_http_mode::JON_RPC, "hard_fork_info", req, res, r))
        return r;
  
      CHECK_PAYMENT(req, res, COST_PER_HARD_FORK_INFO);
      const Blockchain &blockchain = m_core.get_blockchain_storage();
      uint8_t version = req.version > 0 ? req.version : blockchain.get_next_hard_fork_version();
      res.version = blockchain.get_current_hard_fork_version();
      res.enabled = blockchain.get_hard_fork_voting_info(version, res.window, res.votes, res.threshold, res.earliest_height, res.voting);
      res.state = blockchain.get_hard_fork_state();
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_bans(const COMMAND_RPC_GETBANS::request& req, COMMAND_RPC_GETBANS::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(get_bans);
  
      auto now = time(nullptr);
      std::map<std::string, time_t> blocked_hosts = m_p2p.get_blocked_hosts();
      for (std::map<std::string, time_t>::const_iterator i = blocked_hosts.begin(); i != blocked_hosts.end(); ++i)
      {
        if (i->second > now) {
          COMMAND_RPC_GETBANS::ban b;
          b.host = i->first;
          b.ip = 0;
          uint32_t ip;
          if (epee::string_tools::get_ip_int32_from_string(ip, b.host))
            b.ip = ip;
          b.seconds = i->second - now;
          res.bans.push_back(b);
        }
      }
      std::map<epee::net_utils::ipv4_network_subnet, time_t> blocked_subnets = m_p2p.get_blocked_subnets();
      for (std::map<epee::net_utils::ipv4_network_subnet, time_t>::const_iterator i = blocked_subnets.begin(); i != blocked_subnets.end(); ++i)
      {
        if (i->second > now) {
          COMMAND_RPC_GETBANS::ban b;
          b.host = i->first.host_str();
          b.ip = 0;
          b.seconds = i->second - now;
          res.bans.push_back(b);
        }
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_banned(const COMMAND_RPC_BANNED::request& req, COMMAND_RPC_BANNED::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      PERF_TIMER(on_banned);
  
      auto na_parsed = net::get_network_address(req.address, 0);
      if (!na_parsed)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_WRONG_PARAM;
        error_resp.message = "Unsupported host type";
        return false;
      }
      epee::net_utils::network_address na = std::move(*na_parsed);
  
      time_t seconds;
      if (m_p2p.is_host_blocked(na, &seconds))
      {
        res.banned = true;
        res.seconds = seconds;
      }
      else
      {
        res.banned = false;
        res.seconds = 0;
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_set_bans(const COMMAND_RPC_SETBANS::request& req, COMMAND_RPC_SETBANS::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(set_bans);
  
      for (auto i = req.bans.begin(); i != req.bans.end(); ++i)
      {
        epee::net_utils::network_address na;
  
        // try subnet first
        if (!i->host.empty())
        {
          auto ns_parsed = net::get_ipv4_subnet_address(i->host);
          if (ns_parsed)
          {
            if (i->ban)
              m_p2p.block_subnet(*ns_parsed, i->seconds);
            else
              m_p2p.unblock_subnet(*ns_parsed);
            continue;
          }
        }
  
        // then host
        if (!i->host.empty())
        {
          auto na_parsed = net::get_network_address(i->host, 0);
          if (!na_parsed)
          {
            error_resp.code = CORE_RPC_ERROR_CODE_WRONG_PARAM;
            error_resp.message = "Unsupported host/subnet type";
            return false;
          }
          na = std::move(*na_parsed);
        }
        else
        {
          na = epee::net_utils::ipv4_network_address{i->ip, 0};
        }
        if (i->ban)
          m_p2p.block_host(na, i->seconds);
        else
          m_p2p.unblock_host(na);
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_flush_txpool(const COMMAND_RPC_FLUSH_TRANSACTION_POOL::request& req, COMMAND_RPC_FLUSH_TRANSACTION_POOL::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(flush_txpool);
  
      bool failed = false;
      std::vector<crypto::hash> txids;
      if (req.txids.empty())
      {
        std::vector<transaction> pool_txs;
        bool r = m_core.get_pool_transactions(pool_txs, true);
        if (!r)
        {
          res.status = "Failed to get txpool contents";
          return true;
        }
        for (const auto &tx: pool_txs)
        {
          txids.push_back(cryptonote::get_transaction_hash(tx));
        }
      }
      else
      {
        for (const auto &str: req.txids)
        {
          crypto::hash txid;
          if(!epee::string_tools::hex_to_pod(str, txid))
          {
            failed = true;
          }
          else
          {
            txids.push_back(txid);
          }
        }
      }
      if (!m_core.get_blockchain_storage().flush_txes_from_pool(txids))
      {
        res.status = "Failed to remove one or more tx(es)";
        return true;
      }
  
      if (failed)
      {
        if (txids.empty())
          res.status = "Failed to parse txid";
        else
          res.status = "Failed to parse some of the txids";
        return true;
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_output_histogram(const COMMAND_RPC_GET_OUTPUT_HISTOGRAM::request& req, COMMAND_RPC_GET_OUTPUT_HISTOGRAM::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(get_output_histogram);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_OUTPUT_HISTOGRAM>(invoke_http_mode::JON_RPC, "get_output_histogram", req, res, r))
        return r;
  
      const bool restricted = m_restricted && ctx;
      size_t amounts = req.amounts.size();
      if (restricted && amounts == 0)
      {
        res.status = "Restricted RPC will not serve histograms on the whole blockchain. Use your own node.";
        return true;
      }
  
      uint64_t cost = req.amounts.empty() ? COST_PER_FULL_OUTPUT_HISTOGRAM : (COST_PER_OUTPUT_HISTOGRAM * amounts);
      CHECK_PAYMENT_MIN1(req, res, cost, false);
  
      if (restricted && req.recent_cutoff > 0 && req.recent_cutoff < (uint64_t)time(NULL) - OUTPUT_HISTOGRAM_RECENT_CUTOFF_RESTRICTION)
      {
        res.status = "Recent cutoff is too old";
        return true;
      }
  
      std::map<uint64_t, std::tuple<uint64_t, uint64_t, uint64_t>> histogram;
      try
      {
        histogram = m_core.get_blockchain_storage().get_output_histogram(req.amounts, req.unlocked, req.recent_cutoff, req.min_count);
      }
      catch (const std::exception &e)
      {
        res.status = "Failed to get output histogram";
        return true;
      }
  
      res.histogram.clear();
      res.histogram.reserve(histogram.size());
      for (const auto &i: histogram)
      {
        if (std::get<0>(i.second) >= req.min_count && (std::get<0>(i.second) <= req.max_count || req.max_count == 0))
          res.histogram.push_back(COMMAND_RPC_GET_OUTPUT_HISTOGRAM::entry(i.first, std::get<0>(i.second), std::get<1>(i.second), std::get<2>(i.second)));
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_version(const COMMAND_RPC_GET_VERSION::request& req, COMMAND_RPC_GET_VERSION::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(get_version);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_VERSION>(invoke_http_mode::JON_RPC, "get_version", req, res, r))
        return r;
  
      res.version = CORE_RPC_VERSION;
      res.release = MONERO_VERSION_IS_RELEASE;
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_coinbase_tx_sum(const COMMAND_RPC_GET_COINBASE_TX_SUM::request& req, COMMAND_RPC_GET_COINBASE_TX_SUM::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(get_coinbase_tx_sum);
      db_rtxn_guard rtxn_guard(&m_core.get_blockchain_storage().get_db());
      const uint64_t bc_height = m_core.get_current_blockchain_height();
      if (req.height >= bc_height || req.count > bc_height)
      {
        res.status = "height or count is too large";
        return true;
      }
      CHECK_PAYMENT_MIN1(req, res, COST_PER_COINBASE_TX_SUM_BLOCK * req.count, false);
      std::pair<boost::multiprecision::uint128_t, boost::multiprecision::uint128_t> amounts = m_core.get_coinbase_tx_sum(req.height, req.count);
      store_128(amounts.first, res.emission_amount, res.wide_emission_amount, res.emission_amount_top64);
      store_128(amounts.second, res.fee_amount, res.wide_fee_amount, res.fee_amount_top64);
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_base_fee_estimate(const COMMAND_RPC_GET_BASE_FEE_ESTIMATE::request& req, COMMAND_RPC_GET_BASE_FEE_ESTIMATE::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(get_base_fee_estimate);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_BASE_FEE_ESTIMATE>(invoke_http_mode::JON_RPC, "get_fee_estimate", req, res, r))
        return r;
  
      CHECK_PAYMENT(req, res, COST_PER_FEE_ESTIMATE);
      res.fee = m_core.get_blockchain_storage().get_dynamic_base_fee_estimate(req.grace_blocks);
      res.quantization_mask = Blockchain::get_fee_quantization_mask();
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_alternate_chains(const COMMAND_RPC_GET_ALTERNATE_CHAINS::request& req, COMMAND_RPC_GET_ALTERNATE_CHAINS::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(get_alternate_chains);
      db_rtxn_guard rtxn_guard(&m_core.get_blockchain_storage().get_db());
      try
      {
        std::vector<std::pair<Blockchain::block_extended_info, std::vector<crypto::hash>>> chains = m_core.get_blockchain_storage().get_alternative_chains();
        for (const auto &i: chains)
        {
          difficulty_type wdiff = i.first.cumulative_difficulty;
          res.chains.push_back(COMMAND_RPC_GET_ALTERNATE_CHAINS::chain_info{epee::string_tools::pod_to_hex(get_block_hash(i.first.bl)), i.first.height, i.second.size(), 0, "", 0, {}, std::string()});
          store_difficulty(wdiff, res.chains.back().difficulty, res.chains.back().wide_difficulty, res.chains.back().difficulty_top64);
          res.chains.back().block_hashes.reserve(i.second.size());
          for (const crypto::hash &block_id: i.second)
            res.chains.back().block_hashes.push_back(epee::string_tools::pod_to_hex(block_id));
          if (i.first.height < i.second.size())
          {
            res.status = "Error finding alternate chain attachment point";
            return true;
          }
          cryptonote::block main_chain_parent_block;
          try { main_chain_parent_block = m_core.get_blockchain_storage().get_db().get_block_from_height(i.first.height - i.second.size()); }
          catch (const std::exception &e) { res.status = "Error finding alternate chain attachment point"; return true; }
          res.chains.back().main_chain_parent_block = epee::string_tools::pod_to_hex(get_block_hash(main_chain_parent_block));
        }
        res.status = CORE_RPC_STATUS_OK;
      }
      catch (...)
      {
        res.status = "Error retrieving alternate chains";
      }
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_limit(const COMMAND_RPC_GET_LIMIT::request& req, COMMAND_RPC_GET_LIMIT::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(get_limit);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_LIMIT>(invoke_http_mode::JON, "/get_limit", req, res, r))
        return r;
  
      res.limit_down = epee::net_utils::connection_basic::get_rate_down_limit();
      res.limit_up = epee::net_utils::connection_basic::get_rate_up_limit();
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_set_limit(const COMMAND_RPC_SET_LIMIT::request& req, COMMAND_RPC_SET_LIMIT::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(set_limit);
      // -1 = reset to default
      //  0 = do not modify
  
      if (req.limit_down > 0)
      {
        epee::net_utils::connection_basic::set_rate_down_limit(req.limit_down);
      }
      else if (req.limit_down < 0)
      {
        if (req.limit_down != -1)
        {
          res.status = "Invalid parameter";
          return true;
        }
        epee::net_utils::connection_basic::set_rate_down_limit(nodetool::default_limit_down);
      }
  
      if (req.limit_up > 0)
      {
        epee::net_utils::connection_basic::set_rate_up_limit(req.limit_up);
      }
      else if (req.limit_up < 0)
      {
        if (req.limit_up != -1)
        {
          res.status = "Invalid parameter";
          return true;
        }
        epee::net_utils::connection_basic::set_rate_up_limit(nodetool::default_limit_up);
      }
  
      res.limit_down = epee::net_utils::connection_basic::get_rate_down_limit();
      res.limit_up = epee::net_utils::connection_basic::get_rate_up_limit();
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_out_peers(const COMMAND_RPC_OUT_PEERS::request& req, COMMAND_RPC_OUT_PEERS::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(out_peers);
      if (req.set)
        m_p2p.change_max_out_public_peers(req.out_peers);
      res.out_peers = m_p2p.get_max_out_public_peers();
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_in_peers(const COMMAND_RPC_IN_PEERS::request& req, COMMAND_RPC_IN_PEERS::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(in_peers);
      if (req.set)
        m_p2p.change_max_in_public_peers(req.in_peers);
      res.in_peers = m_p2p.get_max_in_public_peers();
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_update(const COMMAND_RPC_UPDATE::request& req, COMMAND_RPC_UPDATE::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(update);
  
      res.update = false;
      if (m_core.offline())
      {
        res.status = "Daemon is running offline";
        return true;
      }
  
      static const char software[] = "monero";
  #ifdef BUILD_TAG
      static const char buildtag[] = BOOST_PP_STRINGIZE(BUILD_TAG);
      static const char subdir[] = "cli";
  #else
      static const char buildtag[] = "source";
      static const char subdir[] = "source";
  #endif
  
      if (req.command != "check" && req.command != "download" && req.command != "update")
      {
        res.status = std::string("unknown command: '") + req.command + "'";
        return true;
      }
  
      std::string version, hash;
      if (!tools::check_updates(software, buildtag, version, hash))
      {
        res.status = "Error checking for updates";
        return true;
      }
      if (tools::vercmp(version.c_str(), MONERO_VERSION) <= 0)
      {
        res.update = false;
        res.status = CORE_RPC_STATUS_OK;
        return true;
      }
      res.update = true;
      res.version = version;
      res.user_uri = tools::get_update_url(software, subdir, buildtag, version, true);
      res.auto_uri = tools::get_update_url(software, subdir, buildtag, version, false);
      res.hash = hash;
      if (req.command == "check")
      {
        res.status = CORE_RPC_STATUS_OK;
        return true;
      }
  
      boost::filesystem::path path;
      if (req.path.empty())
      {
        std::string filename;
        const char *slash = strrchr(res.auto_uri.c_str(), '/');
        if (slash)
          filename = slash + 1;
        else
          filename = std::string(software) + "-update-" + version;
        path = epee::string_tools::get_current_module_folder();
        path /= filename;
      }
      else
      {
        path = req.path;
      }
  
      crypto::hash file_hash;
      if (!tools::sha256sum(path.string(), file_hash) || (hash != epee::string_tools::pod_to_hex(file_hash)))
      {
        MDEBUG("We don't have that file already, downloading");
        if (!tools::download(path.string(), res.auto_uri))
        {
          MERROR("Failed to download " << res.auto_uri);
          return true;
        }
        if (!tools::sha256sum(path.string(), file_hash))
        {
          MERROR("Failed to hash " << path);
          return true;
        }
        if (hash != epee::string_tools::pod_to_hex(file_hash))
        {
          MERROR("Download from " << res.auto_uri << " does not match the expected hash");
          return true;
        }
        MINFO("New version downloaded to " << path);
      }
      else
      {
        MDEBUG("We already have " << path << " with expected hash");
      }
      res.path = path.string();
  
      if (req.command == "download")
      {
        res.status = CORE_RPC_STATUS_OK;
        return true;
      }
  
      res.status = "'update' not implemented yet";
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_pop_blocks(const COMMAND_RPC_POP_BLOCKS::request& req, COMMAND_RPC_POP_BLOCKS::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(pop_blocks);
  
      m_core.get_blockchain_storage().pop_blocks(req.nblocks);
  
      res.height = m_core.get_current_blockchain_height();
      res.status = CORE_RPC_STATUS_OK;
  
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_relay_tx(const COMMAND_RPC_RELAY_TX::request& req, COMMAND_RPC_RELAY_TX::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(relay_tx);
      CHECK_PAYMENT_MIN1(req, res, req.txids.size() * COST_PER_TX_RELAY, false);
  
      const bool restricted = m_restricted && ctx;
  
      bool failed = false;
      res.status = "";
      for (const auto &str: req.txids)
      {
        crypto::hash txid;
        if(!epee::string_tools::hex_to_pod(str, txid))
        {
          if (!res.status.empty()) res.status += ", ";
          res.status += std::string("invalid transaction id: ") + str;
          failed = true;
          continue;
        }
  
        //TODO: The get_pool_transaction could have an optional meta parameter
        bool broadcasted = false;
        cryptonote::blobdata txblob;
        if ((broadcasted = m_core.get_pool_transaction(txid, txblob, relay_category::broadcasted)) || (!restricted && m_core.get_pool_transaction(txid, txblob, relay_category::all)))
        {
          // The settings below always choose i2p/tor if enabled. Otherwise, do fluff iff previously relayed else dandelion++ stem.
          NOTIFY_NEW_TRANSACTIONS::request r;
          r.txs.push_back(std::move(txblob));
          const auto tx_relay = broadcasted ? relay_method::fluff : relay_method::local;
          m_core.get_protocol()->relay_transactions(r, boost::uuids::nil_uuid(), epee::net_utils::zone::invalid, tx_relay);
          //TODO: make sure that tx has reached other nodes here, probably wait to receive reflections from other nodes
        }
        else
        {
          if (!res.status.empty()) res.status += ", ";
          res.status += std::string("transaction not found in pool: ") + str;
          failed = true;
          continue;
        }
      }
  
      if (failed)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = res.status;
        return false;
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_sync_info(const COMMAND_RPC_SYNC_INFO::request& req, COMMAND_RPC_SYNC_INFO::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(sync_info);
      CHECK_PAYMENT(req, res, COST_PER_SYNC_INFO);
  
      crypto::hash top_hash;
      m_core.get_blockchain_top(res.height, top_hash);
      ++res.height; // turn top block height into blockchain height
      res.target_height = m_p2p.get_payload_object().is_synchronized() ? 0 : m_core.get_target_blockchain_height();
      res.next_needed_pruning_seed = m_p2p.get_payload_object().get_next_needed_pruning_stripe().second;
  
      for (const auto &c: m_p2p.get_payload_object().get_connections())
        res.peers.push_back({c});
      const cryptonote::block_queue &block_queue = m_p2p.get_payload_object().get_block_queue();
      block_queue.foreach([&](const cryptonote::block_queue::span &span) {
        const std::string span_connection_id = epee::string_tools::pod_to_hex(span.connection_id);
        uint32_t speed = (uint32_t)(100.0f * block_queue.get_speed(span.connection_id) + 0.5f);
        res.spans.push_back({span.start_block_height, span.nblocks, span_connection_id, (uint32_t)(span.rate + 0.5f), speed, span.size, span.origin.str()});
        return true;
      });
      res.overview = block_queue.get_overview(res.height);
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_txpool_backlog(const COMMAND_RPC_GET_TRANSACTION_POOL_BACKLOG::request& req, COMMAND_RPC_GET_TRANSACTION_POOL_BACKLOG::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(get_txpool_backlog);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_TRANSACTION_POOL_BACKLOG>(invoke_http_mode::JON_RPC, "get_txpool_backlog", req, res, r))
        return r;
      db_rtxn_guard rtxn_guard(&m_core.get_blockchain_storage().get_db());
      size_t n_txes = m_core.get_pool_transactions_count();
      CHECK_PAYMENT_MIN1(req, res, COST_PER_TX_POOL_STATS * n_txes, false);
  
      if (!m_core.get_txpool_backlog(res.backlog))
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = "Failed to get txpool backlog";
        return false;
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_output_distribution(const COMMAND_RPC_GET_OUTPUT_DISTRIBUTION::request& req, COMMAND_RPC_GET_OUTPUT_DISTRIBUTION::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(get_output_distribution);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_OUTPUT_DISTRIBUTION>(invoke_http_mode::JON_RPC, "get_output_distribution", req, res, r))
        return r;
  
      const bool restricted = m_restricted && ctx;
      if (restricted && req.amounts != std::vector<uint64_t>(1, 0))
      {
        error_resp.code = CORE_RPC_ERROR_CODE_RESTRICTED;
        error_resp.message = "Restricted RPC can only get output distribution for rct outputs. Use your own node.";
        return false;
      }
  
      size_t n_0 = 0, n_non0 = 0;
      for (uint64_t amount: req.amounts)
        if (amount) ++n_non0; else ++n_0;
      CHECK_PAYMENT_MIN1(req, res, n_0 * COST_PER_OUTPUT_DISTRIBUTION_0 + n_non0 * COST_PER_OUTPUT_DISTRIBUTION, false);
  
      try
      {
        // 0 is placeholder for the whole chain
        const uint64_t req_to_height = req.to_height ? req.to_height : (m_core.get_current_blockchain_height() - 1);
        for (uint64_t amount: req.amounts)
        {
          auto data = rpc::RpcHandler::get_output_distribution([this](uint64_t amount, uint64_t from, uint64_t to, uint64_t &start_height, std::vector<uint64_t> &distribution, uint64_t &base) { return m_core.get_output_distribution(amount, from, to, start_height, distribution, base); }, amount, req.from_height, req_to_height, [this](uint64_t height) { return m_core.get_blockchain_storage().get_db().get_block_hash_from_height(height); }, req.cumulative, m_core.get_current_blockchain_height());
          if (!data)
          {
            error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
            error_resp.message = "Failed to get output distribution";
            return false;
          }
  
          res.distributions.push_back({std::move(*data), amount, "", req.binary, req.compress});
        }
      }
      catch (const std::exception &e)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = "Failed to get output distribution";
        return false;
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_get_output_distribution_bin(const COMMAND_RPC_GET_OUTPUT_DISTRIBUTION::request& req, COMMAND_RPC_GET_OUTPUT_DISTRIBUTION::response& res, const connection_context *ctx)
    {
      RPC_TRACKER(get_output_distribution_bin);
  
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_OUTPUT_DISTRIBUTION>(invoke_http_mode::BIN, "/get_output_distribution.bin", req, res, r))
        return r;
  
      const bool restricted = m_restricted && ctx;
      if (restricted && req.amounts != std::vector<uint64_t>(1, 0))
      {
        res.status = "Restricted RPC can only get output distribution for rct outputs. Use your own node.";
        return false;
      }
  
      size_t n_0 = 0, n_non0 = 0;
      for (uint64_t amount: req.amounts)
        if (amount) ++n_non0; else ++n_0;
      CHECK_PAYMENT_MIN1(req, res, n_0 * COST_PER_OUTPUT_DISTRIBUTION_0 + n_non0 * COST_PER_OUTPUT_DISTRIBUTION, false);
  
      res.status = "Failed";
  
      if (!req.binary)
      {
        res.status = "Binary only call";
        return true;
      }
      try
      {
        // 0 is placeholder for the whole chain
        const uint64_t req_to_height = req.to_height ? req.to_height : (m_core.get_current_blockchain_height() - 1);
        for (uint64_t amount: req.amounts)
        {
          auto data = rpc::RpcHandler::get_output_distribution([this](uint64_t amount, uint64_t from, uint64_t to, uint64_t &start_height, std::vector<uint64_t> &distribution, uint64_t &base) { return m_core.get_output_distribution(amount, from, to, start_height, distribution, base); }, amount, req.from_height, req_to_height, [this](uint64_t height) { return m_core.get_blockchain_storage().get_db().get_block_hash_from_height(height); }, req.cumulative, m_core.get_current_blockchain_height());
          if (!data)
          {
            res.status = "Failed to get output distribution";
            return true;
          }
  
          res.distributions.push_back({std::move(*data), amount, "", req.binary, req.compress});
        }
      }
      catch (const std::exception &e)
      {
        res.status = "Failed to get output distribution";
        return true;
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_prune_blockchain(const COMMAND_RPC_PRUNE_BLOCKCHAIN::request& req, COMMAND_RPC_PRUNE_BLOCKCHAIN::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(prune_blockchain);
  
      try
      {
        if (!(req.check ? m_core.check_blockchain_pruning() : m_core.prune_blockchain()))
        {
          error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
          error_resp.message = req.check ? "Failed to check blockchain pruning" : "Failed to prune blockchain";
          return false;
        }
        res.pruning_seed = m_core.get_blockchain_pruning_seed();
        res.pruned = res.pruning_seed != 0;
      }
      catch (const std::exception &e)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
        error_resp.message = "Failed to prune blockchain";
        return false;
      }
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_rpc_access_info(const COMMAND_RPC_ACCESS_INFO::request& req, COMMAND_RPC_ACCESS_INFO::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(rpc_access_info);
  
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_ACCESS_INFO>(invoke_http_mode::JON_RPC, "rpc_access_info", req, res, r))
        return r;
  
      // if RPC payment is not enabled
      if (m_rpc_payment == NULL)
      {
        res.diff = 0;
        res.credits_per_hash_found = 0;
        res.credits = 0;
        res.height = 0;
        res.seed_height = 0;
        res.status = CORE_RPC_STATUS_OK;
        return true;
      }
  
      crypto::public_key client;
      uint64_t ts;
      if (!cryptonote::verify_rpc_payment_signature(req.client, client, ts))
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INVALID_CLIENT;
        error_resp.message = "Invalid client ID";
        return false;
      }
  
      crypto::hash top_hash;
      m_core.get_blockchain_top(res.height, top_hash);
      ++res.height;
      cryptonote::blobdata hashing_blob;
      crypto::hash seed_hash, next_seed_hash;
      if (!m_rpc_payment->get_info(client, [&](const cryptonote::blobdata &extra_nonce, cryptonote::block &b, uint64_t &seed_height, crypto::hash &seed_hash)->bool{
        cryptonote::difficulty_type difficulty;
        uint64_t height, expected_reward;
        size_t reserved_offset;
        if (!get_block_template(m_rpc_payment->get_payment_address(), NULL, extra_nonce, reserved_offset, difficulty, height, expected_reward, b, seed_height, seed_hash, next_seed_hash, error_resp))
          return false;
        return true;
      }, hashing_blob, res.seed_height, seed_hash, top_hash, res.diff, res.credits_per_hash_found, res.credits, res.cookie))
      {
        return false;
      }
      if (hashing_blob.empty())
      {
        error_resp.code = CORE_RPC_ERROR_CODE_WRONG_BLOCKBLOB;
        error_resp.message = "Invalid hashing blob";
        return false;
      }
      res.hashing_blob = epee::string_tools::buff_to_hex_nodelimer(hashing_blob);
      res.top_hash = epee::string_tools::pod_to_hex(top_hash);
      if (hashing_blob[0] >= RX_BLOCK_VERSION)
      {
        res.seed_hash = string_tools::pod_to_hex(seed_hash);
        if (seed_hash != next_seed_hash)
          res.next_seed_hash = string_tools::pod_to_hex(next_seed_hash);
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_flush_cache(const COMMAND_RPC_FLUSH_CACHE::request& req, COMMAND_RPC_FLUSH_CACHE::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(flush_cache);
      if (req.bad_txs)
        m_core.flush_bad_txs_cache();
      if (req.bad_blocks)
        m_core.flush_invalid_blocks();
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_rpc_access_submit_nonce(const COMMAND_RPC_ACCESS_SUBMIT_NONCE::request& req, COMMAND_RPC_ACCESS_SUBMIT_NONCE::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(rpc_access_submit_nonce);
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_ACCESS_SUBMIT_NONCE>(invoke_http_mode::JON_RPC, "rpc_access_submit_nonce", req, res, r))
        return r;
  
      // if RPC payment is not enabled
      if (m_rpc_payment == NULL)
      {
        res.status = "Payment not necessary";
        return true;
      }
  
      crypto::public_key client;
      uint64_t ts;
      if (!cryptonote::verify_rpc_payment_signature(req.client, client, ts))
      {
        res.credits = 0;
        error_resp.code = CORE_RPC_ERROR_CODE_INVALID_CLIENT;
        error_resp.message = "Invalid client ID";
        return false;
      }
  
      crypto::hash hash;
      cryptonote::block block;
      crypto::hash top_hash;
      uint64_t height;
      bool stale;
      m_core.get_blockchain_top(height, top_hash);
      if (!m_rpc_payment->submit_nonce(client, req.nonce, top_hash, error_resp.code, error_resp.message, res.credits, hash, block, req.cookie, stale))
      {
        return false;
      }
  
      if (!stale)
      {
        // it might be a valid block!
        const difficulty_type current_difficulty = m_core.get_blockchain_storage().get_difficulty_for_next_block();
        if (check_hash(hash, current_difficulty))
        {
          MINFO("This payment meets the current network difficulty");
          block_verification_context bvc;
          if(m_core.handle_block_found(block, bvc))
            MGINFO_GREEN("Block found by RPC user at height " << get_block_height(block) << ": " <<
                print_money(cryptonote::get_outs_money_amount(block.miner_tx)));
          else
            MERROR("Seemingly valid block was not accepted");
        }
      }
  
      m_core.get_blockchain_top(height, top_hash);
      res.top_hash = epee::string_tools::pod_to_hex(top_hash);
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_rpc_access_pay(const COMMAND_RPC_ACCESS_PAY::request& req, COMMAND_RPC_ACCESS_PAY::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(rpc_access_pay);
  
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_ACCESS_PAY>(invoke_http_mode::JON_RPC, "rpc_access_pay", req, res, r))
        return r;
  
      // if RPC payment is not enabled
      if (m_rpc_payment == NULL)
      {
        res.status = "Payment not necessary";
        return true;
      }
  
      crypto::public_key client;
      uint64_t ts;
      if (!cryptonote::verify_rpc_payment_signature(req.client, client, ts))
      {
        res.credits = 0;
        error_resp.code = CORE_RPC_ERROR_CODE_INVALID_CLIENT;
        error_resp.message = "Invalid client ID";
        return false;
      }
  
      RPCTracker ext_tracker(("external:" + req.paying_for).c_str(), PERF_TIMER_NAME(rpc_access_pay));
      if (!check_payment(req.client, req.payment, req.paying_for, false, res.status, res.credits, res.top_hash))
        return true;
      ext_tracker.pay(req.payment);
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_rpc_access_tracking(const COMMAND_RPC_ACCESS_TRACKING::request& req, COMMAND_RPC_ACCESS_TRACKING::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(rpc_access_tracking);
  
      if (req.clear)
      {
        RPCTracker::clear();
        res.status = CORE_RPC_STATUS_OK;
        return true;
      }
  
      auto data = RPCTracker::data();
      for (const auto &d: data)
      {
        res.data.resize(res.data.size() + 1);
        res.data.back().rpc = d.first;
        res.data.back().count = d.second.count;
        res.data.back().time = d.second.time;
        res.data.back().credits = d.second.credits;
      }
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_rpc_access_data(const COMMAND_RPC_ACCESS_DATA::request& req, COMMAND_RPC_ACCESS_DATA::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(rpc_access_data);
  
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_ACCESS_DATA>(invoke_http_mode::JON_RPC, "rpc_access_data", req, res, r))
        return r;
  
      if (!m_rpc_payment)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_PAYMENTS_NOT_ENABLED;
        error_resp.message = "Payments not enabled";
        return false;
      }
  
      m_rpc_payment->foreach([&](const crypto::public_key &client, const rpc_payment::client_info &info){
        res.entries.push_back({
          epee::string_tools::pod_to_hex(client), info.credits, std::max(info.last_request_timestamp / 1000000, info.update_time),
          info.credits_total, info.credits_used, info.nonces_good, info.nonces_stale, info.nonces_bad, info.nonces_dupe
        });
        return true;
      });
  
      res.hashrate = m_rpc_payment->get_hashes(600) / 600;
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    bool core_rpc_server::on_rpc_access_account(const COMMAND_RPC_ACCESS_ACCOUNT::request& req, COMMAND_RPC_ACCESS_ACCOUNT::response& res, epee::json_rpc::error& error_resp, const connection_context *ctx)
    {
      RPC_TRACKER(rpc_access_account);
  
      bool r;
      if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_ACCESS_ACCOUNT>(invoke_http_mode::JON_RPC, "rpc_access_account", req, res, r))
        return r;
  
      if (!m_rpc_payment)
      {
        error_resp.code = CORE_RPC_ERROR_CODE_PAYMENTS_NOT_ENABLED;
        error_resp.message = "Payments not enabled";
        return false;
      }
  
      crypto::public_key client;
      if (!epee::string_tools::hex_to_pod(req.client.substr(0, 2 * sizeof(client)), client))
      {
        error_resp.code = CORE_RPC_ERROR_CODE_INVALID_CLIENT;
        error_resp.message = "Invalid client ID";
        return false;
      }
  
      res.credits = m_rpc_payment->balance(client, req.delta_balance);
  
      res.status = CORE_RPC_STATUS_OK;
      return true;
    }
    //------------------------------------------------------------------------------------------------------------------------------
    const command_line::arg_descriptor<std::string, false, true, 2> core_rpc_server::arg_rpc_bind_port = {
        "rpc-bind-port"
      , "Port for RPC server"
      , std::to_string(config::RPC_DEFAULT_PORT)
      , {{ &cryptonote::arg_testnet_on, &cryptonote::arg_stagenet_on }}
      , [](std::array<bool, 2> testnet_stagenet, bool defaulted, std::string val)->std::string {
          if (testnet_stagenet[0] && defaulted)
            return std::to_string(config::testnet::RPC_DEFAULT_PORT);
          else if (testnet_stagenet[1] && defaulted)
            return std::to_string(config::stagenet::RPC_DEFAULT_PORT);
          return val;
        }
      };
  
    const command_line::arg_descriptor<std::string> core_rpc_server::arg_rpc_restricted_bind_port = {
        "rpc-restricted-bind-port"
      , "Port for restricted RPC server"
      , ""
      };
  
    const command_line::arg_descriptor<bool> core_rpc_server::arg_restricted_rpc = {
        "restricted-rpc"
      , "Restrict RPC to view only commands and do not return privacy sensitive data in RPC calls"
      , false
      };
  
    const command_line::arg_descriptor<std::string> core_rpc_server::arg_bootstrap_daemon_address = {
        "bootstrap-daemon-address"
      , "URL of a 'bootstrap' remote daemon that the connected wallets can use while this daemon is still not fully synced.\n"
        "Use 'auto' to enable automatic public nodes discovering and bootstrap daemon switching"
      , ""
      };
  
    const command_line::arg_descriptor<std::string> core_rpc_server::arg_bootstrap_daemon_login = {
        "bootstrap-daemon-login"
      , "Specify username:password for the bootstrap daemon login"
      , ""
      };
  
    const command_line::arg_descriptor<std::string> core_rpc_server::arg_bootstrap_daemon_proxy = {
        "bootstrap-daemon-proxy"
      , "<ip>:<port> socks proxy to use for bootstrap daemon connections"
      , ""
      };
  
    const command_line::arg_descriptor<std::string> core_rpc_server::arg_rpc_payment_address = {
        "rpc-payment-address"
      , "Restrict RPC to clients sending micropayment to this address"
      , ""
      };
  
    const command_line::arg_descriptor<uint64_t> core_rpc_server::arg_rpc_payment_difficulty = {
        "rpc-payment-difficulty"
      , "Restrict RPC to clients sending micropayment at this difficulty"
      , DEFAULT_PAYMENT_DIFFICULTY
      };
  
    const command_line::arg_descriptor<uint64_t> core_rpc_server::arg_rpc_payment_credits = {
        "rpc-payment-credits"
      , "Restrict RPC to clients sending micropayment, yields that many credits per payment"
      , DEFAULT_PAYMENT_CREDITS_PER_HASH
      };
  
    const command_line::arg_descriptor<bool> core_rpc_server::arg_rpc_payment_allow_free_loopback = {
        "rpc-payment-allow-free-loopback"
      , "Allow free access from the loopback address (ie, the local host)"
      , false
      };
  }  // namespace cryptonote
  