wallet: new option to start background mining

The setup-background-mining option can be used to select
background mining when a wallet loads. The user will be asked
the first time the wallet is created.

src/cryptonote_basic/miner.cpp

@@ -456,6 +456,7 @@ namespace cryptonote
     // interrupt it just in case
     m_background_mining_thread.interrupt();
     m_background_mining_thread.join();
+    m_is_background_mining_enabled = false;
 
     MINFO("Mining has been stopped, " << m_threads.size() << " finished" );
     m_threads.clear();
@@ -747,10 +748,10 @@ namespace cryptonote
         uint8_t idle_percentage = get_percent_of_total(idle_diff, total_diff);
         uint8_t process_percentage = get_percent_of_total(process_diff, total_diff);
 
-        MGINFO("idle percentage is " << unsigned(idle_percentage) << "\%, miner percentage is " << unsigned(process_percentage) << "\%, ac power : " << on_ac_power);
+        MDEBUG("idle percentage is " << unsigned(idle_percentage) << "\%, miner percentage is " << unsigned(process_percentage) << "\%, ac power : " << on_ac_power);
         if( idle_percentage + process_percentage < get_idle_threshold() || !on_ac_power )
         {
-          MGINFO("cpu is " << unsigned(idle_percentage) << "% idle, idle threshold is " << unsigned(get_idle_threshold()) << "\%, ac power : " << on_ac_power << ", background mining stopping, thanks for your contribution!");
+          MINFO("cpu is " << unsigned(idle_percentage) << "% idle, idle threshold is " << unsigned(get_idle_threshold()) << "\%, ac power : " << on_ac_power << ", background mining stopping, thanks for your contribution!");
           m_is_background_mining_started = false;
 
           // reset process times
@@ -788,10 +789,10 @@ namespace cryptonote
         uint64_t idle_diff = (current_idle_time - prev_idle_time);
         uint8_t idle_percentage = get_percent_of_total(idle_diff, total_diff);
 
-        MGINFO("idle percentage is " << unsigned(idle_percentage));
+        MDEBUG("idle percentage is " << unsigned(idle_percentage));
         if( idle_percentage >= get_idle_threshold() && on_ac_power )
         {
-          MGINFO("cpu is " << unsigned(idle_percentage) << "% idle, idle threshold is " << unsigned(get_idle_threshold()) << "\%, ac power : " << on_ac_power << ", background mining started, good luck!");
+          MINFO("cpu is " << unsigned(idle_percentage) << "% idle, idle threshold is " << unsigned(get_idle_threshold()) << "\%, ac power : " << on_ac_power << ", background mining started, good luck!");
           m_is_background_mining_started = true;
           m_is_background_mining_started_cond.notify_all();
 
@@ -1049,7 +1050,12 @@ namespace cryptonote
 
       if (boost::logic::indeterminate(on_battery))
       {
-        LOG_ERROR("couldn't query power status from " << power_supply_class_path);
+        static bool error_shown = false;
+        if (!error_shown)
+        {
+          LOG_ERROR("couldn't query power status from " << power_supply_class_path);
+          error_shown = true;
+        }
       }
       return on_battery;
 

src/daemon/rpc_command_executor.cpp

@@ -551,11 +551,12 @@ bool t_rpc_command_executor::mining_status() {
     tools::msg_writer() << "  Ignore battery: " << (mres.bg_ignore_battery ? "yes" : "no");
   }
 
-  if (!mining_busy && mres.active)
+  if (!mining_busy && mres.active && mres.speed > 0 && mres.block_target > 0 && mres.difficulty > 0)
   {
-    uint64_t daily = 86400ull / mres.block_target * mres.block_reward;
+    double ratio = mres.speed * mres.block_target / mres.difficulty;
-    uint64_t monthly = 86400ull / mres.block_target * 30.5 * mres.block_reward;
+    uint64_t daily = 86400ull / mres.block_target * mres.block_reward * ratio;
-    uint64_t yearly = 86400ull / mres.block_target * 356 * mres.block_reward;
+    uint64_t monthly = 86400ull / mres.block_target * 30.5 * mres.block_reward * ratio;
+    uint64_t yearly = 86400ull / mres.block_target * 356 * mres.block_reward * ratio;
     tools::msg_writer() << "Expected: " << cryptonote::print_money(daily) << " monero daily, "
         << cryptonote::print_money(monthly) << " monero monthly, " << cryptonote::print_money(yearly) << " yearly";
   }

src/rpc/core_rpc_server.cpp

@@ -939,6 +939,7 @@ namespace cryptonote
     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() ) {

src/rpc/core_rpc_server_commands_defs.h

@@ -821,6 +821,9 @@ namespace cryptonote
       uint8_t bg_target;
       uint32_t block_target;
       uint64_t block_reward;
+      uint64_t difficulty;
+      std::string wide_difficulty;
+      uint64_t difficulty_top64;
 
       BEGIN_KV_SERIALIZE_MAP()
         KV_SERIALIZE(status)
@@ -836,6 +839,9 @@ namespace cryptonote
         KV_SERIALIZE(bg_target)
         KV_SERIALIZE(block_target)
         KV_SERIALIZE(block_reward)
+        KV_SERIALIZE(difficulty)
+        KV_SERIALIZE(wide_difficulty)
+        KV_SERIALIZE(difficulty_top64)
       END_KV_SERIALIZE_MAP()
     };
     typedef epee::misc_utils::struct_init<response_t> response;

src/simplewallet/simplewallet.cpp

@@ -2592,6 +2592,31 @@ bool simple_wallet::set_track_uses(const std::vector<std::string> &args/* = std:
   return true;
 }
 
+bool simple_wallet::set_setup_background_mining(const std::vector<std::string> &args/* = std::vector<std::string>()*/)
+{
+  const auto pwd_container = get_and_verify_password();
+  if (pwd_container)
+  {
+    tools::wallet2::BackgroundMiningSetupType setup = tools::wallet2::BackgroundMiningMaybe;
+    if (args[1] == "yes" || args[1] == "1")
+      setup = tools::wallet2::BackgroundMiningYes;
+    else if (args[1] == "no" || args[1] == "0")
+      setup = tools::wallet2::BackgroundMiningNo;
+    else
+    {
+      fail_msg_writer() << tr("invalid argument: must be either 1/yes or 0/no");
+      return true;
+    }
+    m_wallet->setup_background_mining(setup);
+    m_wallet->rewrite(m_wallet_file, pwd_container->password());
+    if (setup == tools::wallet2::BackgroundMiningYes)
+      start_background_mining();
+    else
+      stop_background_mining();
+  }
+  return true;
+}
+
 bool simple_wallet::set_device_name(const std::vector<std::string> &args/* = std::vector<std::string>()*/)
 {
   const auto pwd_container = get_and_verify_password();
@@ -3125,6 +3150,13 @@ bool simple_wallet::set_variable(const std::vector<std::string> &args)
       case tools::wallet2::AskPasswordOnAction: ask_password_string = "action"; break;
       case tools::wallet2::AskPasswordToDecrypt: ask_password_string = "decrypt"; break;
     }
+    std::string setup_background_mining_string = "invalid";
+    switch (m_wallet->setup_background_mining())
+    {
+      case tools::wallet2::BackgroundMiningMaybe: setup_background_mining_string = "maybe"; break;
+      case tools::wallet2::BackgroundMiningYes: setup_background_mining_string = "yes"; break;
+      case tools::wallet2::BackgroundMiningNo: setup_background_mining_string = "no"; break;
+    }
     success_msg_writer() << "seed = " << seed_language;
     success_msg_writer() << "always-confirm-transfers = " << m_wallet->always_confirm_transfers();
     success_msg_writer() << "print-ring-members = " << m_wallet->print_ring_members();
@@ -3151,6 +3183,7 @@ bool simple_wallet::set_variable(const std::vector<std::string> &args)
     success_msg_writer() << "segregation-height = " << m_wallet->segregation_height();
     success_msg_writer() << "ignore-fractional-outputs = " << m_wallet->ignore_fractional_outputs();
     success_msg_writer() << "track-uses = " << m_wallet->track_uses();
+    success_msg_writer() << "setup-background-mining = " << setup_background_mining_string + tr(" (set this to support the network and to get a chance to receive new monero)");
     success_msg_writer() << "device_name = " << m_wallet->device_name();
     return true;
   }
@@ -3208,6 +3241,7 @@ bool simple_wallet::set_variable(const std::vector<std::string> &args)
     CHECK_SIMPLE_VARIABLE("segregation-height", set_segregation_height, tr("unsigned integer"));
     CHECK_SIMPLE_VARIABLE("ignore-fractional-outputs", set_ignore_fractional_outputs, tr("0 or 1"));
     CHECK_SIMPLE_VARIABLE("track-uses", set_track_uses, tr("0 or 1"));
+    CHECK_SIMPLE_VARIABLE("setup-background-mining", set_setup_background_mining, tr("1/yes or 0/no"));
     CHECK_SIMPLE_VARIABLE("device-name", set_device_name, tr("<device_name[:device_spec]>"));
   }
   fail_msg_writer() << tr("set: unrecognized argument(s)");
@@ -3403,6 +3437,7 @@ bool simple_wallet::init(const boost::program_options::variables_map& vm)
   const network_type nettype = testnet ? TESTNET : stagenet ? STAGENET : MAINNET;
 
   epee::wipeable_string multisig_keys;
+  epee::wipeable_string password;
 
   if (!handle_command_line(vm))
     return false;
@@ -3510,7 +3545,6 @@ bool simple_wallet::init(const boost::program_options::variables_map& vm)
           m_recovery_key = cryptonote::decrypt_key(m_recovery_key, seed_pass);
       }
     }
-    epee::wipeable_string password;
     if (!m_generate_from_view_key.empty())
     {
       m_wallet_file = m_generate_from_view_key;
@@ -3955,8 +3989,9 @@ bool simple_wallet::init(const boost::program_options::variables_map& vm)
       fail_msg_writer() << tr("can't specify --subaddress-lookahead and --wallet-file at the same time");
       return false;
     }
-    bool r = open_wallet(vm);
+    auto r = open_wallet(vm);
     CHECK_AND_ASSERT_MES(r, false, tr("failed to open account"));
+    password = *r;
   }
   if (!m_wallet)
   {
@@ -3972,6 +4007,8 @@ bool simple_wallet::init(const boost::program_options::variables_map& vm)
 
   m_wallet->callback(this);
 
+  check_background_mining(password);
+
   return true;
 }
 //----------------------------------------------------------------------------------------------------
@@ -4341,12 +4378,12 @@ boost::optional<epee::wipeable_string> simple_wallet::new_wallet(const boost::pr
   return std::move(password);
 }
 //----------------------------------------------------------------------------------------------------
-bool simple_wallet::open_wallet(const boost::program_options::variables_map& vm)
+boost::optional<epee::wipeable_string> simple_wallet::open_wallet(const boost::program_options::variables_map& vm)
 {
   if (!tools::wallet2::wallet_valid_path_format(m_wallet_file))
   {
     fail_msg_writer() << tr("wallet file path not valid: ") << m_wallet_file;
-    return false;
+    return {};
   }
 
   bool keys_file_exists;
@@ -4356,7 +4393,7 @@ bool simple_wallet::open_wallet(const boost::program_options::variables_map& vm)
   if(!keys_file_exists)
   {
     fail_msg_writer() << tr("Key file not found. Failed to open wallet");
-    return false;
+    return {};
   }
   
   epee::wipeable_string password;
@@ -4367,7 +4404,7 @@ bool simple_wallet::open_wallet(const boost::program_options::variables_map& vm)
     password = std::move(std::move(rc.second).password());
     if (!m_wallet)
     {
-      return false;
+      return {};
     }
 
     m_wallet->callback(this);
@@ -4393,7 +4430,7 @@ bool simple_wallet::open_wallet(const boost::program_options::variables_map& vm)
     {
       bool is_deterministic;
       {
-        SCOPED_WALLET_UNLOCK();
+        SCOPED_WALLET_UNLOCK_ON_BAD_PASSWORD(return {};);
         is_deterministic = m_wallet->is_deterministic();
       }
       if (is_deterministic)
@@ -4402,7 +4439,7 @@ bool simple_wallet::open_wallet(const boost::program_options::variables_map& vm)
           "a deprecated version of the wallet. Please proceed to upgrade your wallet.\n");
         std::string mnemonic_language = get_mnemonic_language();
         if (mnemonic_language.empty())
-          return false;
+          return {};
         m_wallet->set_seed_language(mnemonic_language);
         m_wallet->rewrite(m_wallet_file, password);
 
@@ -4434,14 +4471,14 @@ bool simple_wallet::open_wallet(const boost::program_options::variables_map& vm)
       if (password_is_correct)
         fail_msg_writer() << boost::format(tr("You may want to remove the file \"%s\" and try again")) % m_wallet_file;
     }
-    return false;
+    return {};
   }
   success_msg_writer() <<
     "**********************************************************************\n" <<
     tr("Use the \"help\" command to see the list of available commands.\n") <<
     tr("Use \"help <command>\" to see a command's documentation.\n") <<
     "**********************************************************************";
-  return true;
+  return std::move(password);
 }
 //----------------------------------------------------------------------------------------------------
 bool simple_wallet::close_wallet()
@@ -4522,7 +4559,118 @@ bool simple_wallet::save_watch_only(const std::vector<std::string> &args/* = std
   }
   return true;
 }
+//----------------------------------------------------------------------------------------------------
+void simple_wallet::start_background_mining()
+{
+  COMMAND_RPC_MINING_STATUS::request reqq;
+  COMMAND_RPC_MINING_STATUS::response resq;
+  bool r = m_wallet->invoke_http_json("/mining_status", reqq, resq);
+  std::string err = interpret_rpc_response(r, resq.status);
+  if (!r)
+    return;
+  if (!err.empty())
+  {
+    fail_msg_writer() << tr("Failed to query mining status: ") << err;
+    return;
+  }
+  if (!resq.is_background_mining_enabled)
+  {
+    COMMAND_RPC_START_MINING::request req;
+    COMMAND_RPC_START_MINING::response res;
+    req.miner_address = m_wallet->get_account().get_public_address_str(m_wallet->nettype());
+    req.threads_count = 1;
+    req.do_background_mining = true;
+    req.ignore_battery = false;
+    bool r = m_wallet->invoke_http_json("/start_mining", req, res);
+    std::string err = interpret_rpc_response(r, res.status);
+    if (!err.empty())
+    {
+      fail_msg_writer() << tr("Failed to setup background mining: ") << err;
+      return;
+    }
+  }
+  success_msg_writer() << tr("Background mining enabled. Thank you for supporting the Monero network.");
+}
+//----------------------------------------------------------------------------------------------------
+void simple_wallet::stop_background_mining()
+{
+  COMMAND_RPC_MINING_STATUS::request reqq;
+  COMMAND_RPC_MINING_STATUS::response resq;
+  bool r = m_wallet->invoke_http_json("/mining_status", reqq, resq);
+  if (!r)
+    return;
+  std::string err = interpret_rpc_response(r, resq.status);
+  if (!err.empty())
+  {
+    fail_msg_writer() << tr("Failed to query mining status: ") << err;
+    return;
+  }
+  if (resq.is_background_mining_enabled)
+  {
+    COMMAND_RPC_STOP_MINING::request req;
+    COMMAND_RPC_STOP_MINING::response res;
+    bool r = m_wallet->invoke_http_json("/stop_mining", req, res);
+    std::string err = interpret_rpc_response(r, res.status);
+    if (!err.empty())
+    {
+      fail_msg_writer() << tr("Failed to setup background mining: ") << err;
+      return;
+    }
+  }
+  message_writer(console_color_red, false) << tr("Background mining not enabled. Run \"set setup-background-mining 1\" to change.");
+}
+//----------------------------------------------------------------------------------------------------
+void simple_wallet::check_background_mining(const epee::wipeable_string &password)
+{
+  tools::wallet2::BackgroundMiningSetupType setup = m_wallet->setup_background_mining();
+  if (setup == tools::wallet2::BackgroundMiningNo)
+  {
+    message_writer(console_color_red, false) << tr("Background mining not enabled. Run \"set setup-background-mining 1\" to change.");
+    return;
+  }
 
+  if (!m_wallet->is_trusted_daemon())
+  {
+    message_writer() << tr("Using an untrusted daemon, skipping background mining check");
+    return;
+  }
+
+  COMMAND_RPC_MINING_STATUS::request req;
+  COMMAND_RPC_MINING_STATUS::response res;
+  bool r = m_wallet->invoke_http_json("/mining_status", req, res);
+  std::string err = interpret_rpc_response(r, res.status);
+  bool is_background_mining_enabled = false;
+  if (err.empty())
+    is_background_mining_enabled = res.is_background_mining_enabled;
+
+  if (is_background_mining_enabled)
+  {
+    // already active, nice
+    m_wallet->setup_background_mining(tools::wallet2::BackgroundMiningYes);
+    m_wallet->rewrite(m_wallet_file, password);
+    start_background_mining();
+    return;
+  }
+  if (res.active)
+    return;
+
+  if (setup == tools::wallet2::BackgroundMiningMaybe)
+  {
+    message_writer() << tr("The daemon is not set up to background mine.");
+    message_writer() << tr("With background mining enabled, the daemon will mine when idle and not on batttery.");
+    message_writer() << tr("Enabling this supports the network you are using, and makes you eligible for receiving new monero");
+    std::string accepted = input_line(tr("Do you want to do it now? (Y/Yes/N/No): "));
+    if (std::cin.eof() || !command_line::is_yes(accepted)) {
+      m_wallet->setup_background_mining(tools::wallet2::BackgroundMiningNo);
+      m_wallet->rewrite(m_wallet_file, password);
+      message_writer(console_color_red, false) << tr("Background mining not enabled. Set setup-background-mining to 1 to change.");
+      return;
+    }
+    m_wallet->setup_background_mining(tools::wallet2::BackgroundMiningYes);
+    m_wallet->rewrite(m_wallet_file, password);
+    start_background_mining();
+  }
+}
 //----------------------------------------------------------------------------------------------------
 bool simple_wallet::start_mining(const std::vector<std::string>& args)
 {

src/simplewallet/simplewallet.h

@@ -102,7 +102,7 @@ namespace cryptonote
     boost::optional<epee::wipeable_string> new_wallet(const boost::program_options::variables_map& vm,
         const epee::wipeable_string &multisig_keys, const std::string &old_language);
     boost::optional<epee::wipeable_string> new_wallet(const boost::program_options::variables_map& vm);
-    bool open_wallet(const boost::program_options::variables_map& vm);
+    boost::optional<epee::wipeable_string> open_wallet(const boost::program_options::variables_map& vm);
     bool close_wallet();
 
     bool viewkey(const std::vector<std::string> &args = std::vector<std::string>());
@@ -143,6 +143,7 @@ namespace cryptonote
     bool set_segregation_height(const std::vector<std::string> &args = std::vector<std::string>());
     bool set_ignore_fractional_outputs(const std::vector<std::string> &args = std::vector<std::string>());
     bool set_track_uses(const std::vector<std::string> &args = std::vector<std::string>());
+    bool set_setup_background_mining(const std::vector<std::string> &args = std::vector<std::string>());
     bool set_device_name(const std::vector<std::string> &args = std::vector<std::string>());
     bool help(const std::vector<std::string> &args = std::vector<std::string>());
     bool start_mining(const std::vector<std::string> &args);
@@ -297,6 +298,13 @@ namespace cryptonote
      */
     void commit_or_save(std::vector<tools::wallet2::pending_tx>& ptx_vector, bool do_not_relay);
 
+    /*!
+     * \brief checks whether background mining is enabled, and asks to configure it if not
+     */
+    void check_background_mining(const epee::wipeable_string &password);
+    void start_background_mining();
+    void stop_background_mining();
+
     //----------------- i_wallet2_callback ---------------------
     virtual void on_new_block(uint64_t height, const cryptonote::block& block);
     virtual void on_money_received(uint64_t height, const crypto::hash &txid, const cryptonote::transaction& tx, uint64_t amount, const cryptonote::subaddress_index& subaddr_index);

src/wallet/wallet2.cpp

@@ -1032,6 +1032,7 @@ wallet2::wallet2(network_type nettype, uint64_t kdf_rounds, bool unattended):
   m_segregation_height(0),
   m_ignore_fractional_outputs(true),
   m_track_uses(false),
+  m_setup_background_mining(BackgroundMiningMaybe),
   m_is_initialized(false),
   m_kdf_rounds(kdf_rounds),
   is_old_file_format(false),
@@ -3514,6 +3515,9 @@ bool wallet2::store_keys(const std::string& keys_file_name, const epee::wipeable
   value2.SetInt(m_track_uses ? 1 : 0);
   json.AddMember("track_uses", value2, json.GetAllocator());
 
+  value2.SetInt(m_setup_background_mining);
+  json.AddMember("setup_background_mining", value2, json.GetAllocator());
+
   value2.SetUint(m_subaddress_lookahead_major);
   json.AddMember("subaddress_lookahead_major", value2, json.GetAllocator());
 
@@ -3662,6 +3666,7 @@ bool wallet2::load_keys(const std::string& keys_file_name, const epee::wipeable_
     m_segregation_height = 0;
     m_ignore_fractional_outputs = true;
     m_track_uses = false;
+    m_setup_background_mining = BackgroundMiningMaybe;
     m_subaddress_lookahead_major = SUBADDRESS_LOOKAHEAD_MAJOR;
     m_subaddress_lookahead_minor = SUBADDRESS_LOOKAHEAD_MINOR;
     m_original_keys_available = false;
@@ -3816,6 +3821,8 @@ bool wallet2::load_keys(const std::string& keys_file_name, const epee::wipeable_
     m_ignore_fractional_outputs = field_ignore_fractional_outputs;
     GET_FIELD_FROM_JSON_RETURN_ON_ERROR(json, track_uses, int, Int, false, false);
     m_track_uses = field_track_uses;
+    GET_FIELD_FROM_JSON_RETURN_ON_ERROR(json, setup_background_mining, BackgroundMiningSetupType, Int, false, BackgroundMiningMaybe);
+    m_setup_background_mining = field_setup_background_mining;
     GET_FIELD_FROM_JSON_RETURN_ON_ERROR(json, subaddress_lookahead_major, uint32_t, Uint, false, SUBADDRESS_LOOKAHEAD_MAJOR);
     m_subaddress_lookahead_major = field_subaddress_lookahead_major;
     GET_FIELD_FROM_JSON_RETURN_ON_ERROR(json, subaddress_lookahead_minor, uint32_t, Uint, false, SUBADDRESS_LOOKAHEAD_MINOR);

src/wallet/wallet2.h

@@ -194,6 +194,12 @@ namespace tools
       AskPasswordToDecrypt = 2,
     };
 
+    enum BackgroundMiningSetupType {
+      BackgroundMiningMaybe = 0,
+      BackgroundMiningYes = 1,
+      BackgroundMiningNo = 2,
+    };
+
     static const char* tr(const char* str);
 
     static bool has_testnet_option(const boost::program_options::variables_map& vm);
@@ -1008,6 +1014,8 @@ namespace tools
     void confirm_non_default_ring_size(bool always) { m_confirm_non_default_ring_size = always; }
     bool track_uses() const { return m_track_uses; }
     void track_uses(bool value) { m_track_uses = value; }
+    BackgroundMiningSetupType setup_background_mining() const { return m_setup_background_mining; }
+    void setup_background_mining(BackgroundMiningSetupType value) { m_setup_background_mining = value; }
     const std::string & device_name() const { return m_device_name; }
     void device_name(const std::string & device_name) { m_device_name = device_name; }
     const std::string & device_derivation_path() const { return m_device_derivation_path; }
@@ -1444,6 +1452,7 @@ namespace tools
     uint64_t m_segregation_height;
     bool m_ignore_fractional_outputs;
     bool m_track_uses;
+    BackgroundMiningSetupType m_setup_background_mining;
     bool m_is_initialized;
     NodeRPCProxy m_node_rpc_proxy;
     std::unordered_set<crypto::hash> m_scanned_pool_txs[2];

src/wallet/wallet_rpc_server.cpp

@@ -273,6 +273,8 @@ namespace tools
     m_auto_refresh_period = DEFAULT_AUTO_REFRESH_PERIOD;
     m_last_auto_refresh_time = boost::posix_time::min_date_time;
 
+    check_background_mining();
+
     m_net_server.set_threads_prefix("RPC");
     auto rng = [](size_t len, uint8_t *ptr) { return crypto::rand(len, ptr); };
     return epee::http_server_impl_base<wallet_rpc_server, connection_context>::init(
@@ -281,6 +283,60 @@ namespace tools
     );
   }
   //------------------------------------------------------------------------------------------------------------------------------
+  void wallet_rpc_server::check_background_mining()
+  {
+    if (!m_wallet)
+      return;
+
+    tools::wallet2::BackgroundMiningSetupType setup = m_wallet->setup_background_mining();
+    if (setup == tools::wallet2::BackgroundMiningNo)
+    {
+      MLOG_RED(el::Level::Warning, "Background mining not enabled. Run \"set setup-background-mining 1\" in monero-wallet-cli to change.");
+      return;
+    }
+
+    if (!m_wallet->is_trusted_daemon())
+    {
+      MDEBUG("Using an untrusted daemon, skipping background mining check");
+      return;
+    }
+
+    cryptonote::COMMAND_RPC_MINING_STATUS::request req;
+    cryptonote::COMMAND_RPC_MINING_STATUS::response res;
+    bool r = m_wallet->invoke_http_json("/mining_status", req, res);
+    if (!r || res.status != CORE_RPC_STATUS_OK)
+    {
+      MERROR("Failed to query mining status: " << (r ? res.status : "No connection to daemon"));
+      return;
+    }
+    if (res.active || res.is_background_mining_enabled)
+      return;
+
+    if (setup == tools::wallet2::BackgroundMiningMaybe)
+    {
+      MINFO("The daemon is not set up to background mine.");
+      MINFO("With background mining enabled, the daemon will mine when idle and not on batttery.");
+      MINFO("Enabling this supports the network you are using, and makes you eligible for receiving new monero");
+      MINFO("Set setup-background-mining to 1 in monero-wallet-cli to change.");
+      return;
+    }
+
+    cryptonote::COMMAND_RPC_START_MINING::request req2;
+    cryptonote::COMMAND_RPC_START_MINING::response res2;
+    req2.miner_address = m_wallet->get_account().get_public_address_str(m_wallet->nettype());
+    req2.threads_count = 1;
+    req2.do_background_mining = true;
+    req2.ignore_battery = false;
+    r = m_wallet->invoke_http_json("/start_mining", req2, res);
+    if (!r || res2.status != CORE_RPC_STATUS_OK)
+    {
+      MERROR("Failed to setup background mining: " << (r ? res.status : "No connection to daemon"));
+      return;
+    }
+
+    MINFO("Background mining enabled. The daemon will mine when idle and not on batttery.");
+  }
+  //------------------------------------------------------------------------------------------------------------------------------
   bool wallet_rpc_server::not_open(epee::json_rpc::error& er)
   {
       er.code = WALLET_RPC_ERROR_CODE_NOT_OPEN;

src/wallet/wallet_rpc_server.h

@@ -252,6 +252,8 @@ namespace tools
 
       bool validate_transfer(const std::list<wallet_rpc::transfer_destination>& destinations, const std::string& payment_id, std::vector<cryptonote::tx_destination_entry>& dsts, std::vector<uint8_t>& extra, bool at_least_one_destination, epee::json_rpc::error& er);
 
+      void check_background_mining();
+
       wallet2 *m_wallet;
       std::string m_wallet_dir;
       tools::private_file rpc_login_file;