text: // Copyright (c) 2009-2010 Satoshi Nakamoto
  // Copyright (c) 2009-2015 The Bitcoin Core developers
  // Copyright (c) 2015-2017 The Bitcoin Unlimited developers
  // Copyright (c) 2016 Bitcoin Unlimited developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #if defined(HAVE_CONFIG_H)
  #include "config/bitcoin-config.h"
  #endif
  
  #include "init.h"
  
  #include "addrman.h"
  #include "amount.h"
  #include "chain.h"
  #include "chainparams.h"
  #include "checkpoints.h"
  #include "compat/sanity.h"
  #include "consensus/validation.h"
  #include "httpserver.h"
  #include "httprpc.h"
  #include "key.h"
  #include "main.h"
  #include "miner.h"
  #include "net.h"
  #include "policy/policy.h"
  #include "rpc/server.h"
  #include "rpc/register.h"
  #include "script/standard.h"
  #include "script/sigcache.h"
  #include "scheduler.h"
  #include "txdb.h"
  #include "txmempool.h"
  #include "torcontrol.h"
  #include "ui_interface.h"
  #include "util.h"
  #include "utilmoneystr.h"
  #include "utilstrencodings.h"
  #include "validationinterface.h"
  #include "unlimited.h"
  #ifdef ENABLE_WALLET
  #include "wallet/db.h"
  #include "wallet/wallet.h"
  #include "wallet/walletdb.h"
  #endif
  #include <stdint.h>
  #include <stdio.h>
  
  #ifndef WIN32
  #include <signal.h>
  #endif
  
  #include <boost/algorithm/string/classification.hpp>
  #include <boost/algorithm/string/predicate.hpp>
  #include <boost/algorithm/string/replace.hpp>
  #include <boost/algorithm/string/split.hpp>
  #include <boost/bind.hpp>
  #include <boost/filesystem.hpp>
  #include <boost/function.hpp>
  #include <boost/interprocess/sync/file_lock.hpp>
  #include <boost/thread.hpp>
  #include <openssl/crypto.h>
  
  #if ENABLE_ZMQ
  #include "zmq/zmqnotificationinterface.h"
  #endif
  
  using namespace std;
  
  bool fFeeEstimatesInitialized = false;
  static const bool DEFAULT_PROXYRANDOMIZE = true;
  static const bool DEFAULT_REST_ENABLE = false;
  static const bool DEFAULT_DISABLE_SAFEMODE = false;
  static const bool DEFAULT_STOPAFTERBLOCKIMPORT = false;
  
  #if ENABLE_ZMQ
  static CZMQNotificationInterface* pzmqNotificationInterface = NULL;
  #endif
  
  #ifdef WIN32
  // Win32 LevelDB doesn't use filedescriptors, and the ones used for
  // accessing block files don't count towards the fd_set size limit
  // anyway.
  #define MIN_CORE_FILEDESCRIPTORS 0
  #else
  #define MIN_CORE_FILEDESCRIPTORS 150
  #endif
  
  /** Used to pass flags to the Bind() function */
  enum BindFlags {
      BF_NONE         = 0,
      BF_EXPLICIT     = (1U << 0),
      BF_REPORT_ERROR = (1U << 1),
      BF_WHITELIST    = (1U << 2),
  };
  
  static const char* FEE_ESTIMATES_FILENAME="fee_estimates.dat";
  CClientUIInterface uiInterface; // Declared but not defined in ui_interface.h
  
  //////////////////////////////////////////////////////////////////////////////
  //
  // Shutdown
  //
  
  //
  // Thread management and startup/shutdown:
  //
  // The network-processing threads are all part of a thread group
  // created by AppInit() or the Qt main() function.
  //
  // A clean exit happens when StartShutdown() or the SIGTERM
  // signal handler sets fRequestShutdown, which triggers
  // the DetectShutdownThread(), which interrupts the main thread group.
  // DetectShutdownThread() then exits, which causes AppInit() to
  // continue (it .joins the shutdown thread).
  // Shutdown() is then
  // called to clean up database connections, and stop other
  // threads that should only be stopped after the main network-processing
  // threads have exited.
  //
  // Note that if running -daemon the parent process returns from AppInit2
  // before adding any threads to the threadGroup, so .join_all() returns
  // immediately and the parent exits from main().
  //
  // Shutdown for Qt is very similar, only it uses a QTimer to detect
  // fRequestShutdown getting set, and then does the normal Qt
  // shutdown thing.
  //
  
  volatile bool fRequestShutdown = false;
  
  void StartShutdown()
  {
      fRequestShutdown = true;
  }
  bool ShutdownRequested()
  {
      return fRequestShutdown;
  }
  
  class CCoinsViewErrorCatcher : public CCoinsViewBacked
  {
  public:
      CCoinsViewErrorCatcher(CCoinsView* view) : CCoinsViewBacked(view) {}
      bool GetCoins(const uint256 &txid, CCoins &coins) const {
          try {
              return CCoinsViewBacked::GetCoins(txid, coins);
          } catch(const std::runtime_error& e) {
              uiInterface.ThreadSafeMessageBox(_("Error reading from database, shutting down."), "", CClientUIInterface::MSG_ERROR);
              LogPrintf("Error reading from database: %s\n", e.what());
              // Starting the shutdown sequence and returning false to the caller would be
              // interpreted as 'entry not found' (as opposed to unable to read data), and
              // could lead to invalid interpretation. Just exit immediately, as we can't
              // continue anyway, and all writes should be atomic.
              abort();
          }
      }
      // Writes do not need similar protection, as failure to write is handled by the caller.
  };
  
  static CCoinsViewDB *pcoinsdbview = NULL;
  static CCoinsViewErrorCatcher *pcoinscatcher = NULL;
  static boost::scoped_ptr<ECCVerifyHandle> globalVerifyHandle;
  
  void Interrupt(boost::thread_group& threadGroup)
  {
      InterruptHTTPServer();
      InterruptHTTPRPC();
      InterruptRPC();
      InterruptREST();
      InterruptTorControl();
      threadGroup.interrupt_all();
  }
  
  void Shutdown()
  {
      LogPrintf("%s: In progress...\n", __func__);
      static CCriticalSection cs_Shutdown;
      TRY_LOCK(cs_Shutdown, lockShutdown);
      if (!lockShutdown)
          return;
  
      /// Note: Shutdown() must be able to handle cases in which AppInit2() failed part of the way,
      /// for example if the data directory was found to be locked.
      /// Be sure that anything that writes files or flushes caches only does this if the respective
      /// module was initialized.
      RenameThread("bitcoin-shutoff");
      mempool.AddTransactionsUpdated(1);
  
      StopHTTPRPC();
      StopREST();
      StopRPC();
      StopHTTPServer();
  #ifdef ENABLE_WALLET
      if (pwalletMain)
          pwalletMain->Flush(false);
  #endif
      GenerateBitcoins(false, 0, Params());
      StopNode();
      StopTorControl();
      UnregisterNodeSignals(GetNodeSignals());
  
      if (fFeeEstimatesInitialized)
      {
          boost::filesystem::path est_path = GetDataDir() / FEE_ESTIMATES_FILENAME;
          CAutoFile est_fileout(fopen(est_path.string().c_str(), "wb"), SER_DISK, CLIENT_VERSION);
          if (!est_fileout.IsNull())
              mempool.WriteFeeEstimates(est_fileout);
          else
              LogPrintf("%s: Failed to write fee estimates to %s\n", __func__, est_path.string());
          fFeeEstimatesInitialized = false;
      }
  
      {
          LOCK(cs_main);
          if (pcoinsTip != NULL) {
              FlushStateToDisk();
          }
          delete pcoinsTip;
          pcoinsTip = NULL;
          delete pcoinscatcher;
          pcoinscatcher = NULL;
          delete pcoinsdbview;
          pcoinsdbview = NULL;
          delete pblocktree;
          pblocktree = NULL;
      }
  #ifdef ENABLE_WALLET
      if (pwalletMain)
          pwalletMain->Flush(true);
  #endif
  
  #if ENABLE_ZMQ
      if (pzmqNotificationInterface) {
          UnregisterValidationInterface(pzmqNotificationInterface);
          delete pzmqNotificationInterface;
          pzmqNotificationInterface = NULL;
      }
  #endif
  
  #ifndef WIN32
      try {
          boost::filesystem::remove(GetPidFile());
      } catch (const boost::filesystem::filesystem_error& e) {
          LogPrintf("%s: Unable to remove pidfile: %s\n", __func__, e.what());
      }
  #endif
      UnregisterAllValidationInterfaces();
  #ifdef ENABLE_WALLET
      delete pwalletMain;
      pwalletMain = NULL;
  #endif
      globalVerifyHandle.reset();
      ECC_Stop();
  
      NetCleanup();
      MainCleanup();
      LogPrintf("%s: done\n", __func__);
  }
  
  /**
   * Signal handlers are very limited in what they are allowed to do, so:
   */
  void HandleSIGTERM(int)
  {
      fRequestShutdown = true;
  }
  
  void HandleSIGHUP(int)
  {
      fReopenDebugLog = true;
  }
  
  bool static InitError(const std::string &str)
  {
      uiInterface.ThreadSafeMessageBox(str, "", CClientUIInterface::MSG_ERROR);
      return false;
  }
  
  bool static InitWarning(const std::string &str)
  {
      uiInterface.ThreadSafeMessageBox(str, "", CClientUIInterface::MSG_WARNING);
      return true;
  }
  
  bool static Bind(const CService &addr, unsigned int flags) {
      if (!(flags & BF_EXPLICIT) && IsLimited(addr))
          return false;
      std::string strError;
      if (!BindListenPort(addr, strError, (flags & BF_WHITELIST) != 0)) {
          if (flags & BF_REPORT_ERROR)
              return InitError(strError);
          return false;
      }
      return true;
  }
  
  void OnRPCStopped()
  {
      cvBlockChange.notify_all();
      LogPrint("rpc", "RPC stopped.\n");
  }
  
  void OnRPCPreCommand(const CRPCCommand& cmd)
  {
      // Observe safe mode
      string strWarning = GetWarnings("rpc");
      if (strWarning != "" && !GetBoolArg("-disablesafemode", DEFAULT_DISABLE_SAFEMODE) &&
          !cmd.okSafeMode)
          throw JSONRPCError(RPC_FORBIDDEN_BY_SAFE_MODE, string("Safe mode: ") + strWarning);
  }
  
  std::string HelpMessage(HelpMessageMode mode)
  {
      const bool showDebug = GetBoolArg("-help-debug", false);
  
      // When adding new options to the categories, please keep and ensure alphabetical ordering.
      // Do not translate _(...) -help-debug options, Many technical terms, and only a very small audience, so is unnecessary stress to translators.
      string strUsage = HelpMessageGroup(_("Options:"));
      strUsage += HelpMessageOpt("-?", _("This help message"));
      strUsage += HelpMessageOpt("-version", _("Print version and exit"));
      // BUIP013 disables network alerts
  #if 0
      strUsage += HelpMessageOpt("-alerts", strprintf(_("Receive and display P2P network alerts (default: %u)"), DEFAULT_ALERTS));
  #endif
      strUsage += HelpMessageOpt("-alertnotify=<cmd>", _("Execute command when a relevant alert is received or we see a really long fork (%s in cmd is replaced by message)"));
      strUsage += HelpMessageOpt("-blocknotify=<cmd>", _("Execute command when the best block changes (%s in cmd is replaced by block hash)"));
      if (showDebug)
          strUsage += HelpMessageOpt("-blocksonly", strprintf(_("Whether to operate in a blocks only mode (default: %u)"), DEFAULT_BLOCKSONLY));
      strUsage += HelpMessageOpt("-checkblocks=<n>", strprintf(_("How many blocks to check at startup (default: %u, 0 = all)"), DEFAULT_CHECKBLOCKS));
      strUsage += HelpMessageOpt("-checklevel=<n>", strprintf(_("How thorough the block verification of -checkblocks is (0-4, default: %u)"), DEFAULT_CHECKLEVEL));
      strUsage += HelpMessageOpt("-conf=<file>", strprintf(_("Specify configuration file (default: %s)"), BITCOIN_CONF_FILENAME));
      if (mode == HMM_BITCOIND)
      {
  #ifndef WIN32
          strUsage += HelpMessageOpt("-daemon", _("Run in the background as a daemon and accept commands"));
  #endif
      }
      strUsage += HelpMessageOpt("-datadir=<dir>", _("Specify data directory"));
      strUsage += HelpMessageOpt("-dbcache=<n>", strprintf(_("Set database cache size in megabytes (%d to %d, default: %d)"), nMinDbCache, nMaxDbCache, nDefaultDbCache));
      strUsage += HelpMessageOpt("-loadblock=<file>", _("Imports blocks from external blk000??.dat file on startup"));
      strUsage += HelpMessageOpt("-maxorphantx=<n>", strprintf(_("Keep at most <n> unconnectable transactions in memory (default: %u)"), DEFAULT_MAX_ORPHAN_TRANSACTIONS));
      strUsage += HelpMessageOpt("-maxmempool=<n>", strprintf(_("Keep the transaction memory pool below <n> megabytes (default: %u)"), DEFAULT_MAX_MEMPOOL_SIZE));
      strUsage += HelpMessageOpt("-mempoolexpiry=<n>", strprintf(_("Do not keep transactions in the mempool longer than <n> hours (default: %u)"), DEFAULT_MEMPOOL_EXPIRY));
      strUsage += HelpMessageOpt("-par=<n>", strprintf(_("Set the number of script verification threads (%u to %d, 0 = auto, <0 = leave that many cores free, default: %d)"),
          -GetNumCores(), MAX_SCRIPTCHECK_THREADS, DEFAULT_SCRIPTCHECK_THREADS));
  #ifndef WIN32
      strUsage += HelpMessageOpt("-pid=<file>", strprintf(_("Specify pid file (default: %s)"), BITCOIN_PID_FILENAME));
  #endif
      strUsage += HelpMessageOpt("-prune=<n>", strprintf(_("Reduce storage requirements by pruning (deleting) old blocks. This mode is incompatible with -txindex and -rescan. "
              "Warning: Reverting this setting requires re-downloading the entire blockchain. "
              "(default: 0 = disable pruning blocks, >%u = target size in MiB to use for block files)"), MIN_DISK_SPACE_FOR_BLOCK_FILES / 1024 / 1024));
      strUsage += HelpMessageOpt("-reindex", _("Rebuild block chain index from current blk000??.dat files on startup"));
  #ifndef WIN32
      strUsage += HelpMessageOpt("-sysperms", _("Create new files with system default permissions, instead of umask 077 (only effective with disabled wallet functionality)"));
  #endif
      strUsage += HelpMessageOpt("-txindex", strprintf(_("Maintain a full transaction index, used by the getrawtransaction rpc call (default: %u)"), DEFAULT_TXINDEX));
  
      strUsage += HelpMessageGroup(_("Connection options:"));
      strUsage += HelpMessageOpt("-addnode=<ip>", _("Add a node to connect to and attempt to keep the connection open"));
      strUsage += HelpMessageOpt("-banscore=<n>", strprintf(_("Threshold for disconnecting misbehaving peers (default: %u)"), DEFAULT_BANSCORE_THRESHOLD));
      strUsage += HelpMessageOpt("-bantime=<n>", strprintf(_("Number of seconds to keep misbehaving peers from reconnecting (default: %u)"), DEFAULT_MISBEHAVING_BANTIME));
      strUsage += HelpMessageOpt("-bind=<addr>", _("Bind to given address and always listen on it. Use [host]:port notation for IPv6"));
      strUsage += HelpMessageOpt("-connect=<ip>", _("Connect only to the specified node(s)"));
      strUsage += HelpMessageOpt("-discover", _("Discover own IP addresses (default: 1 when listening and no -externalip or -proxy)"));
      strUsage += HelpMessageOpt("-dns", _("Allow DNS lookups for -addnode, -seednode and -connect") + " " + strprintf(_("(default: %u)"), DEFAULT_NAME_LOOKUP));
      strUsage += HelpMessageOpt("-dnsseed", _("Query for peer addresses via DNS lookup, if low on addresses (default: 1 unless -connect)"));
      strUsage += HelpMessageOpt("-externalip=<ip>", _("Specify your own public address"));
      strUsage += HelpMessageOpt("-forcednsseed", strprintf(_("Always query for peer addresses via DNS lookup (default: %u)"), DEFAULT_FORCEDNSSEED));
      strUsage += HelpMessageOpt("-listen", _("Accept connections from outside (default: 1 if no -proxy or -connect)"));
      strUsage += HelpMessageOpt("-listenonion", strprintf(_("Automatically create Tor hidden service (default: %d)"), DEFAULT_LISTEN_ONION));
      strUsage += HelpMessageOpt("-maxconnections=<n>", strprintf(_("Maintain at most <n> connections to peers (default: %u)"), DEFAULT_MAX_PEER_CONNECTIONS));
      strUsage += HelpMessageOpt("-maxreceivebuffer=<n>", strprintf(_("Maximum per-connection receive buffer, <n>*1000 bytes (default: %u)"), DEFAULT_MAXRECEIVEBUFFER));
      strUsage += HelpMessageOpt("-maxsendbuffer=<n>", strprintf(_("Maximum per-connection send buffer, <n>*1000 bytes (default: %u)"), DEFAULT_MAXSENDBUFFER));
      strUsage += HelpMessageOpt("-onion=<ip:port>", strprintf(_("Use separate SOCKS5 proxy to reach peers via Tor hidden services (default: %s)"), "-proxy"));
      strUsage += HelpMessageOpt("-onlynet=<net>", _("Only connect to nodes in network <net> (ipv4, ipv6 or onion)"));
      strUsage += HelpMessageOpt("-permitbaremultisig", strprintf(_("Relay non-P2SH multisig (default: %u)"), DEFAULT_PERMIT_BAREMULTISIG));
      strUsage += HelpMessageOpt("-peerbloomfilters", strprintf(_("Support filtering of blocks and transaction with bloom filters (default: %u)"), 1));
      if (showDebug)
          strUsage += HelpMessageOpt("-enforcenodebloom", strprintf("Enforce minimum protocol version to limit use of bloom filters (default: %u)", 0));
      strUsage += HelpMessageOpt("-port=<port>", strprintf(_("Listen for connections on <port> (default: %u or testnet: %u)"), Params(CBaseChainParams::MAIN).GetDefaultPort(), Params(CBaseChainParams::TESTNET).GetDefaultPort()));
      strUsage += HelpMessageOpt("-proxy=<ip:port>", _("Connect through SOCKS5 proxy"));
      strUsage += HelpMessageOpt("-proxyrandomize", strprintf(_("Randomize credentials for every proxy connection. This enables Tor stream isolation (default: %u)"), DEFAULT_PROXYRANDOMIZE));
      strUsage += HelpMessageOpt("-seednode=<ip>", _("Connect to a node to retrieve peer addresses, and disconnect"));
      strUsage += HelpMessageOpt("-timeout=<n>", strprintf(_("Specify connection timeout in milliseconds (minimum: 1, default: %d)"), DEFAULT_CONNECT_TIMEOUT));
      strUsage += HelpMessageOpt("-torcontrol=<ip>:<port>", strprintf(_("Tor control port to use if onion listening enabled (default: %s)"), DEFAULT_TOR_CONTROL));
      strUsage += HelpMessageOpt("-torpassword=<pass>", _("Tor control port password (default: empty)"));
  #ifdef USE_UPNP
  #if USE_UPNP
      strUsage += HelpMessageOpt("-upnp", _("Use UPnP to map the listening port (default: 1 when listening and no -proxy)"));
  #else
      strUsage += HelpMessageOpt("-upnp", strprintf(_("Use UPnP to map the listening port (default: %u)"), 0));
  #endif
  #endif
      strUsage += HelpMessageOpt("-whitebind=<addr>", _("Bind to given address and whitelist peers connecting to it. Use [host]:port notation for IPv6"));
      strUsage += HelpMessageOpt("-whitelist=<netmask>", _("Whitelist peers connecting from the given netmask or IP address. Can be specified multiple times.") +
          " " + _("Whitelisted peers cannot be DoS banned and their transactions are always relayed, even if they are already in the mempool, useful e.g. for a gateway"));
      strUsage += HelpMessageOpt("-whitelistrelay", strprintf(_("Accept relayed transactions received from whitelisted peers even when not relaying transactions (default: %d)"), DEFAULT_WHITELISTRELAY));
      strUsage += HelpMessageOpt("-whitelistforcerelay", strprintf(_("Force relay of transactions from whitelisted peers even they violate local relay policy (default: %d)"), DEFAULT_WHITELISTFORCERELAY));
      strUsage += HelpMessageOpt("-maxuploadtarget=<n>", strprintf(_("Tries to keep outbound traffic under the given target (in MiB per 24h), 0 = no limit (default: %d)"), DEFAULT_MAX_UPLOAD_TARGET));
  
  #ifdef ENABLE_WALLET
      strUsage += CWallet::GetWalletHelpString(showDebug);
  #endif
  
  #if ENABLE_ZMQ
      strUsage += HelpMessageGroup(_("ZeroMQ notification options:"));
      strUsage += HelpMessageOpt("-zmqpubhashblock=<address>", _("Enable publish hash block in <address>"));
      strUsage += HelpMessageOpt("-zmqpubhashtx=<address>", _("Enable publish hash transaction in <address>"));
      strUsage += HelpMessageOpt("-zmqpubrawblock=<address>", _("Enable publish raw block in <address>"));
      strUsage += HelpMessageOpt("-zmqpubrawtx=<address>", _("Enable publish raw transaction in <address>"));
  #endif
  
      strUsage += HelpMessageGroup(_("Debugging/Testing options:"));
      strUsage += HelpMessageOpt("-uacomment=<cmt>", _("Append comment to the user agent string"));
      if (showDebug)
      {
          strUsage += HelpMessageOpt("-checkblockindex", strprintf("Do a full consistency check for mapBlockIndex, setBlockIndexCandidates, chainActive and mapBlocksUnlinked occasionally. Also sets -checkmempool (default: %u)", Params(CBaseChainParams::MAIN).DefaultConsistencyChecks()));
          strUsage += HelpMessageOpt("-checkmempool=<n>", strprintf("Run checks every <n> transactions (default: %u)", Params(CBaseChainParams::MAIN).DefaultConsistencyChecks()));
          strUsage += HelpMessageOpt("-checkpoints", strprintf("Disable expensive verification for known chain history (default: %u)", DEFAULT_CHECKPOINTS_ENABLED));
          strUsage += HelpMessageOpt("-disablesafemode", strprintf("Disable safemode, override a real safe mode event (default: %u)", DEFAULT_DISABLE_SAFEMODE));
          strUsage += HelpMessageOpt("-testsafemode", strprintf("Force safe mode (default: %u)", DEFAULT_TESTSAFEMODE));
          strUsage += HelpMessageOpt("-dropmessagestest=<n>", "Randomly drop 1 of every <n> network messages");
          strUsage += HelpMessageOpt("-fuzzmessagestest=<n>", "Randomly fuzz 1 of every <n> network messages");
          strUsage += HelpMessageOpt("-stopafterblockimport", strprintf("Stop running after importing blocks from disk (default: %u)", DEFAULT_STOPAFTERBLOCKIMPORT));
          strUsage += HelpMessageOpt("-limitancestorcount=<n>", strprintf("Do not accept transactions if number of in-mempool ancestors is <n> or more (default: %u)", DEFAULT_ANCESTOR_LIMIT));
          strUsage += HelpMessageOpt("-limitancestorsize=<n>", strprintf("Do not accept transactions whose size with all in-mempool ancestors exceeds <n> kilobytes (default: %u)", DEFAULT_ANCESTOR_SIZE_LIMIT));
          strUsage += HelpMessageOpt("-limitdescendantcount=<n>", strprintf("Do not accept transactions if any ancestor would have <n> or more in-mempool descendants (default: %u)", DEFAULT_DESCENDANT_LIMIT));
          strUsage += HelpMessageOpt("-limitdescendantsize=<n>", strprintf("Do not accept transactions if any ancestor would have more than <n> kilobytes of in-mempool descendants (default: %u).", DEFAULT_DESCENDANT_SIZE_LIMIT));
      }
      string debugCategories = "addrman, alert, bench, coindb, db, lock, rand, rpc, selectcoins, mempool, mempoolrej, net, proxy, prune, http, libevent, tor, zmq, thin"; // Don't translate these and qt below
      if (mode == HMM_BITCOIN_QT)
          debugCategories += ", qt";
      strUsage += HelpMessageOpt("-debug=<category>", strprintf(_("Output debugging information (default: %u, supplying <category> is optional)"), 0) + ". " +
          _("If <category> is not supplied or if <category> = 1, output all debugging information.") + _("<category> can be:") + " " + debugCategories + ".");
      if (showDebug)
          strUsage += HelpMessageOpt("-nodebug", "Turn off debugging messages, same as -debug=0");
      strUsage += HelpMessageOpt("-help-debug", _("Show all debugging options (usage: --help -help-debug)"));
      strUsage += HelpMessageOpt("-logips", strprintf(_("Include IP addresses in debug output (default: %u)"), DEFAULT_LOGIPS));
      strUsage += HelpMessageOpt("-logtimestamps", strprintf(_("Prepend debug output with timestamp (default: %u)"), DEFAULT_LOGTIMESTAMPS));
      if (showDebug)
      {
          strUsage += HelpMessageOpt("-logtimemicros", strprintf("Add microsecond precision to debug timestamps (default: %u)", DEFAULT_LOGTIMEMICROS));
          strUsage += HelpMessageOpt("-mocktime=<n>", "Replace actual time with <n> seconds since epoch (default: 0)");
          strUsage += HelpMessageOpt("-limitfreerelay=<n>", strprintf("Continuously rate-limit free transactions to <n>*1000 bytes per minute (default: %u)", DEFAULT_LIMITFREERELAY));
          strUsage += HelpMessageOpt("-relaypriority", strprintf("Require high priority for relaying free or low-fee transactions (default: %u)", DEFAULT_RELAYPRIORITY));
          strUsage += HelpMessageOpt("-maxsigcachesize=<n>", strprintf("Limit size of signature cache to <n> MiB (default: %u)", DEFAULT_MAX_SIG_CACHE_SIZE));
      }
      strUsage += HelpMessageOpt("-minrelaytxfee=<amt>", strprintf(_("Fees (in %s/kB) smaller than this are considered zero fee for relaying, mining and transaction creation (default: %s)"),
          CURRENCY_UNIT, FormatMoney(DEFAULT_MIN_RELAY_TX_FEE)));
      strUsage += HelpMessageOpt("-printtoconsole", _("Send trace/debug info to console instead of debug.log file"));
      if (showDebug)
      {
          strUsage += HelpMessageOpt("-printpriority", strprintf("Log transaction priority and fee per kB when mining blocks (default: %u)", DEFAULT_PRINTPRIORITY));
          strUsage += HelpMessageOpt("-regtest", "Enter regression test mode, which uses a special chain in which blocks can be solved instantly. "
              "This is intended for regression testing tools and app development.");
      }
      strUsage += HelpMessageOpt("-shrinkdebugfile", _("Shrink debug.log file on client startup (default: 1 when no -debug)"));
  
      AppendParamsHelpMessages(strUsage, showDebug);
  
      strUsage += HelpMessageGroup(_("Node relay options:"));
      if (showDebug)
          strUsage += HelpMessageOpt("-acceptnonstdtxn", strprintf("Relay and mine \"non-standard\" transactions (%sdefault: %u)", "testnet/regtest only; ", !Params(CBaseChainParams::TESTNET).RequireStandard()));
      strUsage += HelpMessageOpt("-bytespersigop", strprintf(_("Minimum bytes per sigop in transactions we relay and mine (default: %u)"), DEFAULT_BYTES_PER_SIGOP));
      strUsage += HelpMessageOpt("-datacarrier", strprintf(_("Relay and mine data carrier transactions (default: %u)"), DEFAULT_ACCEPT_DATACARRIER));
      strUsage += HelpMessageOpt("-datacarriersize", strprintf(_("Maximum size of data in data carrier transactions we relay and mine (default: %u)"), MAX_OP_RETURN_RELAY));
      // BUIP004: RBF not allowed.  strUsage += HelpMessageOpt("-mempoolreplacement", strprintf(_("Enable transaction replacement in the memory pool (default: %u)"), DEFAULT_ENABLE_REPLACEMENT));
  
      strUsage += HelpMessageGroup(_("Block creation options:"));
      strUsage += HelpMessageOpt("-blockminsize=<n>", strprintf(_("Set minimum block size in bytes (default: %u)"), DEFAULT_BLOCK_MIN_SIZE));
      strUsage += HelpMessageOpt("-blockmaxsize=<n>", strprintf(_("Set maximum block size in bytes (default: %d)"), DEFAULT_BLOCK_MAX_SIZE));
      strUsage += HelpMessageOpt("-blockprioritysize=<n>", strprintf(_("Set maximum size of high-priority/low-fee transactions in bytes (default: %d)"), DEFAULT_BLOCK_PRIORITY_SIZE));
      if (showDebug)
          strUsage += HelpMessageOpt("-blockversion=<n>", "Override block version to test forking scenarios");
  
      strUsage += HelpMessageGroup(_("RPC server options:"));
      strUsage += HelpMessageOpt("-server", _("Accept command line and JSON-RPC commands"));
      strUsage += HelpMessageOpt("-rest", strprintf(_("Accept public REST requests (default: %u)"), DEFAULT_REST_ENABLE));
      strUsage += HelpMessageOpt("-rpcbind=<addr>", _("Bind to given address to listen for JSON-RPC connections. Use [host]:port notation for IPv6. This option can be specified multiple times (default: bind to all interfaces)"));
      strUsage += HelpMessageOpt("-rpccookiefile=<loc>", _("Location of the auth cookie (default: data dir)"));
      strUsage += HelpMessageOpt("-rpcuser=<user>", _("Username for JSON-RPC connections"));
      strUsage += HelpMessageOpt("-rpcpassword=<pw>", _("Password for JSON-RPC connections"));
      strUsage += HelpMessageOpt("-rpcauth=<userpw>", _("Username and hashed password for JSON-RPC connections. The field <userpw> comes in the format: <USERNAME>:<SALT>$<HASH>. A canonical python script is included in share/rpcuser. This option can be specified multiple times"));
      strUsage += HelpMessageOpt("-rpcport=<port>", strprintf(_("Listen for JSON-RPC connections on <port> (default: %u or testnet: %u)"), BaseParams(CBaseChainParams::MAIN).RPCPort(), BaseParams(CBaseChainParams::TESTNET).RPCPort()));
      strUsage += HelpMessageOpt("-rpcallowip=<ip>", _("Allow JSON-RPC connections from specified source. Valid for <ip> are a single IP (e.g. 1.2.3.4), a network/netmask (e.g. 1.2.3.4/255.255.255.0) or a network/CIDR (e.g. 1.2.3.4/24). This option can be specified multiple times"));
  
      strUsage += HelpMessageOpt("-rpcthreads=<n>", strprintf(_("Set the number of threads to service RPC calls (default: %d)"), DEFAULT_HTTP_THREADS));
      if (showDebug) {
          strUsage += HelpMessageOpt("-rpcworkqueue=<n>", strprintf("Set the depth of the work queue to service RPC calls (default: %d)", DEFAULT_HTTP_WORKQUEUE));
          strUsage += HelpMessageOpt("-rpcservertimeout=<n>", strprintf("Timeout during HTTP requests (default: %d)", DEFAULT_HTTP_SERVER_TIMEOUT));
      }
  
      // BU TODO: 0.11.2 options -- may be deprecated
      strUsage += HelpMessageOpt("-rpckeepalive", strprintf(_("RPC support for HTTP persistent connections (default: %d)"), 1));
  
      strUsage += HelpMessageGroup(_("RPC SSL options: (see the Bitcoin Wiki for SSL setup instructions)"));
      strUsage += HelpMessageOpt("-rpcssl", _("Use OpenSSL (https) for JSON-RPC connections"));
      strUsage += HelpMessageOpt("-rpcsslcertificatechainfile=<file.cert>", strprintf(_("Server certificate file (default: %s)"), "server.cert"));
      strUsage += HelpMessageOpt("-rpcsslprivatekeyfile=<file.pem>", strprintf(_("Server private key (default: %s)"), "server.pem"));
      strUsage += HelpMessageOpt("-rpcsslciphers=<ciphers>", strprintf(_("Acceptable ciphers (default: %s)"), "TLSv1.2+HIGH:TLSv1+HIGH:!SSLv2:!aNULL:!eNULL:!3DES:@STRENGTH"));
  
      if (mode == HMM_BITCOIN_QT)
      {
          strUsage += HelpMessageGroup(_("UI Options:"));
          if (showDebug) {
              strUsage += HelpMessageOpt("-allowselfsignedrootcertificates", "Allow self signed root certificates (default: 0)");
          }
          strUsage += HelpMessageOpt("-choosedatadir", _("Choose data directory on startup (default: 0)"));
          strUsage += HelpMessageOpt("-lang=<lang>", _("Set language, for example \"de_DE\" (default: system locale)"));
          strUsage += HelpMessageOpt("-min", _("Start minimized"));
          strUsage += HelpMessageOpt("-rootcertificates=<file>", _("Set SSL root certificates for payment request (default: -system-)"));
          strUsage += HelpMessageOpt("-splash", _("Show splash screen on startup (default: 1)"));
      }
      // END 0.11.2 options
  
      strUsage += UnlimitedCmdLineHelp();
  
      return strUsage;
  }
  
  // BU LicenseInfo() is moved to unlimited.cpp
  
  static void BlockNotifyCallback(bool initialSync, const CBlockIndex *pBlockIndex)
  {
      if (initialSync || !pBlockIndex)
          return;
  
      std::string strCmd = GetArg("-blocknotify", "");
  
      boost::replace_all(strCmd, "%s", pBlockIndex->GetBlockHash().GetHex());
      boost::thread t(runCommand, strCmd); // thread runs free
  }
  
  struct CImportingNow
  {
      CImportingNow() {
          assert(fImporting == false);
          fImporting = true;
      }
  
      ~CImportingNow() {
          assert(fImporting == true);
          fImporting = false;
      }
  };
  
  
  // If we're using -prune with -reindex, then delete block files that will be ignored by the
  // reindex.  Since reindexing works by starting at block file 0 and looping until a blockfile
  // is missing, do the same here to delete any later block files after a gap.  Also delete all
  // rev files since they'll be rewritten by the reindex anyway.  This ensures that vinfoBlockFile
  // is in sync with what's actually on disk by the time we start downloading, so that pruning
  // works correctly.
  void CleanupBlockRevFiles()
  {
      using namespace boost::filesystem;
      map<string, path> mapBlockFiles;
  
      // Glob all blk?????.dat and rev?????.dat files from the blocks directory.
      // Remove the rev files immediately and insert the blk file paths into an
      // ordered map keyed by block file index.
      LogPrintf("Removing unusable blk?????.dat and rev?????.dat files for -reindex with -prune\n");
      path blocksdir = GetDataDir() / "blocks";
      for (directory_iterator it(blocksdir); it != directory_iterator(); it++) {
          if (is_regular_file(*it) &&
              it->path().filename().string().length() == 12 &&
              it->path().filename().string().substr(8,4) == ".dat")
          {
              if (it->path().filename().string().substr(0,3) == "blk")
                  mapBlockFiles[it->path().filename().string().substr(3,5)] = it->path();
              else if (it->path().filename().string().substr(0,3) == "rev")
                  remove(it->path());
          }
      }
  
      // Remove all block files that aren't part of a contiguous set starting at
      // zero by walking the ordered map (keys are block file indices) by
      // keeping a separate counter.  Once we hit a gap (or if 0 doesn't exist)
      // start removing block files.
      int nContigCounter = 0;
      BOOST_FOREACH(const PAIRTYPE(string, path)& item, mapBlockFiles) {
          if (atoi(item.first) == nContigCounter) {
              nContigCounter++;
              continue;
          }
          remove(item.second);
      }
  }
  
  void ThreadImport(std::vector<boost::filesystem::path> vImportFiles)
  {
      const CChainParams& chainparams = Params();
      RenameThread("bitcoin-loadblk");
      // -reindex
      if (fReindex) {
          CImportingNow imp;
          int nFile = 0;
          while (true) {
              CDiskBlockPos pos(nFile, 0);
              if (!boost::filesystem::exists(GetBlockPosFilename(pos, "blk")))
                  break; // No block files left to reindex
              FILE *file = OpenBlockFile(pos, true);
              if (!file)
                  break; // This error is logged in OpenBlockFile
              LogPrintf("Reindexing block file blk%05u.dat...\n", (unsigned int)nFile);
              LoadExternalBlockFile(chainparams, file, &pos);
              nFile++;
          }
          pblocktree->WriteReindexing(false);
          fReindex = false;
          LogPrintf("Reindexing finished\n");
          // To avoid ending up in a situation without genesis block, re-try initializing (no-op if reindexing worked):
          InitBlockIndex(chainparams);
      }
  
      // hardcoded $DATADIR/bootstrap.dat
      boost::filesystem::path pathBootstrap = GetDataDir() / "bootstrap.dat";
      if (boost::filesystem::exists(pathBootstrap)) {
          FILE *file = fopen(pathBootstrap.string().c_str(), "rb");
          if (file) {
              CImportingNow imp;
              boost::filesystem::path pathBootstrapOld = GetDataDir() / "bootstrap.dat.old";
              LogPrintf("Importing bootstrap.dat...\n");
              LoadExternalBlockFile(chainparams, file);
              RenameOver(pathBootstrap, pathBootstrapOld);
          } else {
              LogPrintf("Warning: Could not open bootstrap file %s\n", pathBootstrap.string());
          }
      }
  
      // -loadblock=
      BOOST_FOREACH(const boost::filesystem::path& path, vImportFiles) {
          FILE *file = fopen(path.string().c_str(), "rb");
          if (file) {
              CImportingNow imp;
              LogPrintf("Importing blocks file %s...\n", path.string());
              LoadExternalBlockFile(chainparams, file);
          } else {
              LogPrintf("Warning: Could not open blocks file %s\n", path.string());
          }
      }
  
      if (GetBoolArg("-stopafterblockimport", DEFAULT_STOPAFTERBLOCKIMPORT)) {
          LogPrintf("Stopping after block import\n");
          StartShutdown();
      }
  }
  
  /** Sanity checks
   *  Ensure that Bitcoin is running in a usable environment with all
   *  necessary library support.
   */
  bool InitSanityCheck(void)
  {
      if(!ECC_InitSanityCheck()) {
          InitError("Elliptic curve cryptography sanity check failure. Aborting.");
          return false;
      }
      if (!glibc_sanity_test() || !glibcxx_sanity_test())
          return false;
  
      return true;
  }
  
  bool AppInitServers(boost::thread_group& threadGroup)
  {
      RPCServer::OnStopped(&OnRPCStopped);
      RPCServer::OnPreCommand(&OnRPCPreCommand);
      if (!InitHTTPServer())
          return false;
      if (!StartRPC())
          return false;
      if (!StartHTTPRPC())
          return false;
      if (GetBoolArg("-rest", DEFAULT_REST_ENABLE) && !StartREST())
          return false;
      if (!StartHTTPServer())
          return false;
      return true;
  }
  
  // Parameter interaction based on rules
  void InitParameterInteraction()
  {
      // when specifying an explicit binding address, you want to listen on it
      // even when -connect or -proxy is specified
      if (mapArgs.count("-bind")) {
          if (SoftSetBoolArg("-listen", true))
              LogPrintf("%s: parameter interaction: -bind set -> setting -listen=1\n", __func__);
      }
      if (mapArgs.count("-whitebind")) {
          if (SoftSetBoolArg("-listen", true))
              LogPrintf("%s: parameter interaction: -whitebind set -> setting -listen=1\n", __func__);
      }
  
      if (mapArgs.count("-connect") && mapMultiArgs["-connect"].size() > 0) {
          // when only connecting to trusted nodes, do not seed via DNS, or listen by default
          if (SoftSetBoolArg("-dnsseed", false))
              LogPrintf("%s: parameter interaction: -connect set -> setting -dnsseed=0\n", __func__);
          if (SoftSetBoolArg("-listen", false))
              LogPrintf("%s: parameter interaction: -connect set -> setting -listen=0\n", __func__);
      }
  
      if (mapArgs.count("-proxy")) {
          // to protect privacy, do not listen by default if a default proxy server is specified
          if (SoftSetBoolArg("-listen", false))
              LogPrintf("%s: parameter interaction: -proxy set -> setting -listen=0\n", __func__);
          // to protect privacy, do not use UPNP when a proxy is set. The user may still specify -listen=1
          // to listen locally, so don't rely on this happening through -listen below.
          if (SoftSetBoolArg("-upnp", false))
              LogPrintf("%s: parameter interaction: -proxy set -> setting -upnp=0\n", __func__);
          // to protect privacy, do not discover addresses by default
          if (SoftSetBoolArg("-discover", false))
              LogPrintf("%s: parameter interaction: -proxy set -> setting -discover=0\n", __func__);
      }
  
      if (!GetBoolArg("-listen", DEFAULT_LISTEN)) {
          // do not map ports or try to retrieve public IP when not listening (pointless)
          if (SoftSetBoolArg("-upnp", false))
              LogPrintf("%s: parameter interaction: -listen=0 -> setting -upnp=0\n", __func__);
          if (SoftSetBoolArg("-discover", false))
              LogPrintf("%s: parameter interaction: -listen=0 -> setting -discover=0\n", __func__);
          if (SoftSetBoolArg("-listenonion", false))
              LogPrintf("%s: parameter interaction: -listen=0 -> setting -listenonion=0\n", __func__);
      }
  
      if (mapArgs.count("-externalip")) {
          // if an explicit public IP is specified, do not try to find others
          if (SoftSetBoolArg("-discover", false))
              LogPrintf("%s: parameter interaction: -externalip set -> setting -discover=0\n", __func__);
      }
  
      if (GetBoolArg("-salvagewallet", false)) {
          // Rewrite just private keys: rescan to find transactions
          if (SoftSetBoolArg("-rescan", true))
              LogPrintf("%s: parameter interaction: -salvagewallet=1 -> setting -rescan=1\n", __func__);
      }
  
      // -zapwallettx implies a rescan
      if (GetBoolArg("-zapwallettxes", false)) {
          if (SoftSetBoolArg("-rescan", true))
              LogPrintf("%s: parameter interaction: -zapwallettxes=<mode> -> setting -rescan=1\n", __func__);
      }
  
      // disable walletbroadcast and whitelistrelay in blocksonly mode
      if (GetBoolArg("-blocksonly", DEFAULT_BLOCKSONLY)) {
          if (SoftSetBoolArg("-whitelistrelay", false))
              LogPrintf("%s: parameter interaction: -blocksonly=1 -> setting -whitelistrelay=0\n", __func__);
  #ifdef ENABLE_WALLET
          if (SoftSetBoolArg("-walletbroadcast", false))
              LogPrintf("%s: parameter interaction: -blocksonly=1 -> setting -walletbroadcast=0\n", __func__);
  #endif
      }
  
      // Forcing relay from whitelisted hosts implies we will accept relays from them in the first place.
      if (GetBoolArg("-whitelistforcerelay", DEFAULT_WHITELISTFORCERELAY)) {
          if (SoftSetBoolArg("-whitelistrelay", true))
              LogPrintf("%s: parameter interaction: -whitelistforcerelay=1 -> setting -whitelistrelay=1\n", __func__);
      }
  }
  
  void InitLogging()
  {
      fPrintToConsole = GetBoolArg("-printtoconsole", false);
      fLogTimestamps = GetBoolArg("-logtimestamps", DEFAULT_LOGTIMESTAMPS);
      fLogTimeMicros = GetBoolArg("-logtimemicros", DEFAULT_LOGTIMEMICROS);
      fLogIPs = GetBoolArg("-logips", DEFAULT_LOGIPS);
  
      LogPrintf("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
      LogPrintf("Bitcoin version %s (%s)\n", FormatFullVersion(), CLIENT_DATE);
  }
  
  /** Initialize bitcoin.
   *  @pre Parameters should be parsed and config file should be read.
   */
  bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
  {
      // ********************************************************* Step 1: setup
  #ifdef _MSC_VER
      // Turn off Microsoft heap dump noise
      _CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE);
      _CrtSetReportFile(_CRT_WARN, CreateFileA("NUL", GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, 0));
  #endif
  #if _MSC_VER >= 1400
      // Disable confusing "helpful" text message on abort, Ctrl-C
      _set_abort_behavior(0, _WRITE_ABORT_MSG | _CALL_REPORTFAULT);
  #endif
  #ifdef WIN32
      // Enable Data Execution Prevention (DEP)
      // Minimum supported OS versions: WinXP SP3, WinVista >= SP1, Win Server 2008
      // A failure is non-critical and needs no further attention!
  #ifndef PROCESS_DEP_ENABLE
      // We define this here, because GCCs winbase.h limits this to _WIN32_WINNT >= 0x0601 (Windows 7),
      // which is not correct. Can be removed, when GCCs winbase.h is fixed!
  #define PROCESS_DEP_ENABLE 0x00000001
  #endif
      typedef BOOL (WINAPI *PSETPROCDEPPOL)(DWORD);
      PSETPROCDEPPOL setProcDEPPol = (PSETPROCDEPPOL)GetProcAddress(GetModuleHandleA("Kernel32.dll"), "SetProcessDEPPolicy");
      if (setProcDEPPol != NULL) setProcDEPPol(PROCESS_DEP_ENABLE);
  #endif
  
      if (!SetupNetworking())
          return InitError("Initializing networking failed");
  
  #ifndef WIN32
      if (GetBoolArg("-sysperms", false)) {
  #ifdef ENABLE_WALLET
          if (!GetBoolArg("-disablewallet", false))
              return InitError("-sysperms is not allowed in combination with enabled wallet functionality");
  #endif
      } else {
          umask(077);
      }
  
      // Clean shutdown on SIGTERM
      struct sigaction sa;
      sa.sa_handler = HandleSIGTERM;
      sigemptyset(&sa.sa_mask);
      sa.sa_flags = 0;
      sigaction(SIGTERM, &sa, NULL);
      sigaction(SIGINT, &sa, NULL);
  
      // Reopen debug.log on SIGHUP
      struct sigaction sa_hup;
      sa_hup.sa_handler = HandleSIGHUP;
      sigemptyset(&sa_hup.sa_mask);
      sa_hup.sa_flags = 0;
      sigaction(SIGHUP, &sa_hup, NULL);
  
      // Ignore SIGPIPE, otherwise it will bring the daemon down if the client closes unexpectedly
      signal(SIGPIPE, SIG_IGN);
  #endif
  
      // ********************************************************* Step 2: parameter interactions
      const CChainParams& chainparams = Params();
  
      // also see: InitParameterInteraction()
  
      // if using block pruning, then disable txindex
      if (GetArg("-prune", 0)) {
          if (GetBoolArg("-txindex", DEFAULT_TXINDEX))
              return InitError(_("Prune mode is incompatible with -txindex."));
  #ifdef ENABLE_WALLET
          if (GetBoolArg("-rescan", false)) {
              return InitError(_("Rescans are not possible in pruned mode. You will need to use -reindex which will download the whole blockchain again."));
          }
  #endif
      }
  
      // Make sure enough file descriptors are available
      int nBind = std::max((int)mapArgs.count("-bind") + (int)mapArgs.count("-whitebind"), 1);
      int nUserMaxConnections = GetArg("-maxconnections", DEFAULT_MAX_PEER_CONNECTIONS);
      nMaxConnections = std::max(nUserMaxConnections, 0);
  
      // Trim requested connection counts, to fit into system limitations
      nMaxConnections = std::max(std::min(nMaxConnections, (int)(FD_SETSIZE - nBind - MIN_CORE_FILEDESCRIPTORS)), 0);
      int nFD = RaiseFileDescriptorLimit(nMaxConnections + MIN_CORE_FILEDESCRIPTORS);
      if (nFD < MIN_CORE_FILEDESCRIPTORS)
          return InitError(_("Not enough file descriptors available."));
      nMaxConnections = std::min(nFD - MIN_CORE_FILEDESCRIPTORS, nMaxConnections);
  
      if (nMaxConnections < nUserMaxConnections)
          InitWarning(strprintf(_("Reducing -maxconnections from %d to %d, because of system limitations."), nUserMaxConnections, nMaxConnections));
  
      // ********************************************************* Step 3: parameter-to-internal-flags
  
      fDebug = !mapMultiArgs["-debug"].empty();
      // Special-case: if -debug=0/-nodebug is set, turn off debugging messages
      const vector<string>& categories = mapMultiArgs["-debug"];
      if (GetBoolArg("-nodebug", false) || find(categories.begin(), categories.end(), string("0")) != categories.end())
          fDebug = false;
  
      // Check for -debugnet
      if (GetBoolArg("-debugnet", false))
          InitWarning(_("Unsupported argument -debugnet ignored, use -debug=net."));
      // Check for -socks - as this is a privacy risk to continue, exit here
      if (mapArgs.count("-socks"))
          return InitError(_("Unsupported argument -socks found. Setting SOCKS version isn't possible anymore, only SOCKS5 proxies are supported."));
      // Check for -tor - as this is a privacy risk to continue, exit here
      if (GetBoolArg("-tor", false))
          return InitError(_("Unsupported argument -tor found, use -onion."));
  
      if (GetBoolArg("-benchmark", false))
          InitWarning(_("Unsupported argument -benchmark ignored, use -debug=bench."));
  
      if (GetBoolArg("-whitelistalwaysrelay", false))
          InitWarning(_("Unsupported argument -whitelistalwaysrelay ignored, use -whitelistrelay and/or -whitelistforcerelay."));
  
      // Checkmempool and checkblockindex default to true in regtest mode
      int ratio = std::min<int>(std::max<int>(GetArg("-checkmempool", chainparams.DefaultConsistencyChecks() ? 1 : 0), 0), 1000000);
      if (ratio != 0) {
          mempool.setSanityCheck(1.0 / ratio);
      }
      fCheckBlockIndex = GetBoolArg("-checkblockindex", chainparams.DefaultConsistencyChecks());
      fCheckpointsEnabled = GetBoolArg("-checkpoints", DEFAULT_CHECKPOINTS_ENABLED);
  
      // mempool limits
      int64_t nMempoolSizeMax = GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000;
      int64_t nMempoolSizeMin = GetArg("-limitdescendantsize", DEFAULT_DESCENDANT_SIZE_LIMIT) * 1000 * 40;
      if (nMempoolSizeMax < 0 || nMempoolSizeMax < nMempoolSizeMin)
          return InitError(strprintf(_("-maxmempool must be at least %d MB"), std::ceil(nMempoolSizeMin / 1000000.0)));
  
      // -par=0 means autodetect, but nScriptCheckThreads==0 means no concurrency
      nScriptCheckThreads = GetArg("-par", DEFAULT_SCRIPTCHECK_THREADS);
      if (nScriptCheckThreads <= 0)
          nScriptCheckThreads += GetNumCores();
      if (nScriptCheckThreads <= 1)
          nScriptCheckThreads = 0;
      else if (nScriptCheckThreads > MAX_SCRIPTCHECK_THREADS)
          nScriptCheckThreads = MAX_SCRIPTCHECK_THREADS;
  
      fServer = GetBoolArg("-server", false);
  
      // block pruning; get the amount of disk space (in MiB) to allot for block & undo files
      int64_t nSignedPruneTarget = GetArg("-prune", 0) * 1024 * 1024;
      if (nSignedPruneTarget < 0) {
          return InitError(_("Prune cannot be configured with a negative value."));
      }
      nPruneTarget = (uint64_t) nSignedPruneTarget;
      if (nPruneTarget) {
          if (nPruneTarget < MIN_DISK_SPACE_FOR_BLOCK_FILES) {
              return InitError(strprintf(_("Prune configured below the minimum of %d MiB.  Please use a higher number."), MIN_DISK_SPACE_FOR_BLOCK_FILES / 1024 / 1024));
          }
          LogPrintf("Prune configured to target %uMiB on disk for block and undo files.\n", nPruneTarget / 1024 / 1024);
          fPruneMode = true;
      }
  
      RegisterAllCoreRPCCommands(tableRPC);
  #ifdef ENABLE_WALLET
      bool fDisableWallet = GetBoolArg("-disablewallet", false);
      if (!fDisableWallet)
          RegisterWalletRPCCommands(tableRPC);
  #endif
  
      nConnectTimeout = GetArg("-timeout", DEFAULT_CONNECT_TIMEOUT);
      if (nConnectTimeout <= 0)
          nConnectTimeout = DEFAULT_CONNECT_TIMEOUT;
  
      // Fee-per-kilobyte amount considered the same as "free"
      // If you are mining, be careful setting this:
      // if you set it to zero then
      // a transaction spammer can cheaply fill blocks using
      // 1-satoshi-fee transactions. It should be set above the real
      // cost to you of processing a transaction.
      if (mapArgs.count("-minrelaytxfee"))
      {
          CAmount n = 0;
          if (ParseMoney(mapArgs["-minrelaytxfee"], n) && n > 0)
              ::minRelayTxFee = CFeeRate(n);
          else
              return InitError(strprintf(_("Invalid amount for -minrelaytxfee=<amount>: '%s'"), mapArgs["-minrelaytxfee"]));
      }
  
      fRequireStandard = !GetBoolArg("-acceptnonstdtxn", !Params().RequireStandard());
      if (Params().RequireStandard() && !fRequireStandard)
          return InitError(strprintf("acceptnonstdtxn is not currently supported for %s chain", chainparams.NetworkIDString()));
      nBytesPerSigOp = GetArg("-bytespersigop", nBytesPerSigOp);
  
  #ifdef ENABLE_WALLET
      if (!CWallet::ParameterInteraction())
          return false;
  #endif // ENABLE_WALLET
  
      fIsBareMultisigStd = GetBoolArg("-permitbaremultisig", DEFAULT_PERMIT_BAREMULTISIG);
      fAcceptDatacarrier = GetBoolArg("-datacarrier", DEFAULT_ACCEPT_DATACARRIER);
      nMaxDatacarrierBytes = GetArg("-datacarriersize", nMaxDatacarrierBytes);
  
  	// BUIP013 disables network alerts
  #if 0
      fAlerts = GetBoolArg("-alerts", DEFAULT_ALERTS);
  #endif
  
      // Option to startup with mocktime set (used for regression testing):
      SetMockTime(GetArg("-mocktime", 0)); // SetMockTime(0) is a no-op
  
      if (GetBoolArg("-peerbloomfilters", true))
          nLocalServices |= NODE_BLOOM;
  
      //BUIP010 Xtreme Thinblocks: begin section Initialize XTHIN service
      if (GetBoolArg("-use-thinblocks", true))
          nLocalServices |= NODE_XTHIN;
      // BUIP010 Xtreme Thinblocks: begin section
  
  #if 0 // BUIP004: mempool replacement is not allowed    
      fEnableReplacement = GetBoolArg("-mempoolreplacement", DEFAULT_ENABLE_REPLACEMENT);
      if ((!fEnableReplacement) && mapArgs.count("-mempoolreplacement")) {
          // Minimal effort at forwards compatibility
          std::string strReplacementModeList = GetArg("-mempoolreplacement", "");  // default is impossible
          std::vector<std::string> vstrReplacementModes;
          boost::split(vstrReplacementModes, strReplacementModeList, boost::is_any_of(","));
          fEnableReplacement = (std::find(vstrReplacementModes.begin(), vstrReplacementModes.end(), "fee") != vstrReplacementModes.end());
      }
  #endif    
  
      // ********************************************************* Step 4: application initialization: dir lock, daemonize, pidfile, debug log
  
      // Initialize elliptic curve code
      ECC_Start();
      globalVerifyHandle.reset(new ECCVerifyHandle());
  
      // Sanity check
      if (!InitSanityCheck())
          return InitError(_("Initialization sanity check failed. Bitcoin is shutting down."));
  
      std::string strDataDir = GetDataDir().string();
  
      // Make sure only a single Bitcoin process is using the data directory.
      boost::filesystem::path pathLockFile = GetDataDir() / ".lock";
      FILE* file = fopen(pathLockFile.string().c_str(), "a"); // empty lock file; created if it doesn't exist.
      if (file) fclose(file);
  
      try {
          static boost::interprocess::file_lock lock(pathLockFile.string().c_str());
          if (!lock.try_lock())
              return InitError(strprintf(_("Cannot obtain a lock on data directory %s. Bitcoin is probably already running."), strDataDir));
      } catch(const boost::interprocess::interprocess_exception& e) {
          return InitError(strprintf(_("Cannot obtain a lock on data directory %s. Bitcoin is probably already running.") + " %s.", strDataDir, e.what()));
      }
  
  #ifndef WIN32
      CreatePidFile(GetPidFile(), getpid());
  #endif
      if (GetBoolArg("-shrinkdebugfile", !fDebug))
          ShrinkDebugFile();
  
      if (fPrintToDebugLog)
          OpenDebugLog();
  
  #ifdef ENABLE_WALLET
      LogPrintf("Using BerkeleyDB version %s\n", DbEnv::version(0, 0, 0));
  #endif
      if (!fLogTimestamps)
          LogPrintf("Startup time: %s\n", DateTimeStrFormat("%Y-%m-%d %H:%M:%S", GetTime()));
      LogPrintf("Default data directory %s\n", GetDefaultDataDir().string());
      LogPrintf("Using data directory %s\n", strDataDir);
      LogPrintf("Using config file %s\n", GetConfigFile().string());
      LogPrintf("Using at most %i connections (%i file descriptors available)\n", nMaxConnections, nFD);
      std::ostringstream strErrors;
  
      LogPrintf("Using %u threads for script verification\n", nScriptCheckThreads);
      if (nScriptCheckThreads) {
          for (int i=0; i<nScriptCheckThreads-1; i++)
              threadGroup.create_thread(&ThreadScriptCheck);
      }
  
      // Start the lightweight task scheduler thread
      CScheduler::Function serviceLoop = boost::bind(&CScheduler::serviceQueue, &scheduler);
      threadGroup.create_thread(boost::bind(&TraceThread<CScheduler::Function>, "scheduler", serviceLoop));
  
      /* Start the RPC server already.  It will be started in "warmup" mode
       * and not really process calls already (but it will signify connections
       * that the server is there and will be ready later).  Warmup mode will
       * be disabled when initialisation is finished.
       */
      if (fServer)
      {
          uiInterface.InitMessage.connect(SetRPCWarmupStatus);
          if (!AppInitServers(threadGroup))
              return InitError(_("Unable to start HTTP server. See debug log for details."));
      }
  
      int64_t nStart;
  
      // ********************************************************* Step 5: verify wallet database integrity
  #ifdef ENABLE_WALLET
      if (!fDisableWallet) {
          if (!CWallet::Verify())
              return false;
      } // (!fDisableWallet)
  #endif // ENABLE_WALLET
      // ********************************************************* Step 6: network initialization
  
      RegisterNodeSignals(GetNodeSignals());
  
      // sanitize comments per BIP-0014, format user agent and check total size
      std::vector<string> uacomments;
      BOOST_FOREACH(string cmt, mapMultiArgs["-uacomment"])
      {
          if (cmt != SanitizeString(cmt, SAFE_CHARS_UA_COMMENT))
              return InitError(strprintf(_("User Agent comment (%s) contains unsafe characters."), cmt));
          uacomments.push_back(SanitizeString(cmt, SAFE_CHARS_UA_COMMENT));
      }
      strSubVersion = FormatSubVersion(CLIENT_NAME, CLIENT_VERSION, uacomments);
      if (strSubVersion.size() > MAX_SUBVERSION_LENGTH) {
          return InitError(strprintf(_("Total length of network version string (%i) exceeds maximum length (%i). Reduce the number or size of uacomments."),
              strSubVersion.size(), MAX_SUBVERSION_LENGTH));
      }
  
      if (mapArgs.count("-onlynet")) {
          std::set<enum Network> nets;
          BOOST_FOREACH(const std::string& snet, mapMultiArgs["-onlynet"]) {
              enum Network net = ParseNetwork(snet);
              if (net == NET_UNROUTABLE)
                  return InitError(strprintf(_("Unknown network specified in -onlynet: '%s'"), snet));
              nets.insert(net);
          }
          for (int n = 0; n < NET_MAX; n++) {
              enum Network net = (enum Network)n;
              if (!nets.count(net))
                  SetLimited(net);
          }
      }
  
      if (mapArgs.count("-whitelist")) {
          BOOST_FOREACH(const std::string& net, mapMultiArgs["-whitelist"]) {
              CSubNet subnet(net);
              if (!subnet.IsValid())
                  return InitError(strprintf(_("Invalid netmask specified in -whitelist: '%s'"), net));
              CNode::AddWhitelistedRange(subnet);
          }
      }
  
      bool proxyRandomize = GetBoolArg("-proxyrandomize", DEFAULT_PROXYRANDOMIZE);
      // -proxy sets a proxy for all outgoing network traffic
      // -noproxy (or -proxy=0) as well as the empty string can be used to not set a proxy, this is the default
      std::string proxyArg = GetArg("-proxy", "");
      SetLimited(NET_TOR);
      if (proxyArg != "" && proxyArg != "0") {
          proxyType addrProxy = proxyType(CService(proxyArg, 9050), proxyRandomize);
          if (!addrProxy.IsValid())
              return InitError(strprintf(_("Invalid -proxy address: '%s'"), proxyArg));
  
          SetProxy(NET_IPV4, addrProxy);
          SetProxy(NET_IPV6, addrProxy);
          SetProxy(NET_TOR, addrProxy);
          SetNameProxy(addrProxy);
          SetLimited(NET_TOR, false); // by default, -proxy sets onion as reachable, unless -noonion later
      }
  
      // -onion can be used to set only a proxy for .onion, or override normal proxy for .onion addresses
      // -noonion (or -onion=0) disables connecting to .onion entirely
      // An empty string is used to not override the onion proxy (in which case it defaults to -proxy set above, or none)
      std::string onionArg = GetArg("-onion", "");
      if (onionArg != "") {
          if (onionArg == "0") { // Handle -noonion/-onion=0
              SetLimited(NET_TOR); // set onions as unreachable
          } else {
              proxyType addrOnion = proxyType(CService(onionArg, 9050), proxyRandomize);
              if (!addrOnion.IsValid())
                  return InitError(strprintf(_("Invalid -onion address: '%s'"), onionArg));
              SetProxy(NET_TOR, addrOnion);
              SetLimited(NET_TOR, false);
          }
      }
  
      // see Step 2: parameter interactions for more information about these
      fListen = GetBoolArg("-listen", DEFAULT_LISTEN);
      fDiscover = GetBoolArg("-discover", true);
      fNameLookup = GetBoolArg("-dns", DEFAULT_NAME_LOOKUP);
  
      bool fBound = false;
      if (fListen) {
          if (mapArgs.count("-bind") || mapArgs.count("-whitebind")) {
              BOOST_FOREACH(const std::string& strBind, mapMultiArgs["-bind"]) {
                  CService addrBind;
                  if (!Lookup(strBind.c_str(), addrBind, GetListenPort(), false))
                      return InitError(strprintf(_("Cannot resolve -bind address: '%s'"), strBind));
                  fBound |= Bind(addrBind, (BF_EXPLICIT | BF_REPORT_ERROR));
              }
              BOOST_FOREACH(const std::string& strBind, mapMultiArgs["-whitebind"]) {
                  CService addrBind;
                  if (!Lookup(strBind.c_str(), addrBind, 0, false))
                      return InitError(strprintf(_("Cannot resolve -whitebind address: '%s'"), strBind));
                  if (addrBind.GetPort() == 0)
                      return InitError(strprintf(_("Need to specify a port with -whitebind: '%s'"), strBind));
                  fBound |= Bind(addrBind, (BF_EXPLICIT | BF_REPORT_ERROR | BF_WHITELIST));
              }
          }
          else {
              struct in_addr inaddr_any;
              inaddr_any.s_addr = INADDR_ANY;
              fBound |= Bind(CService(in6addr_any, GetListenPort()), BF_NONE);
              fBound |= Bind(CService(inaddr_any, GetListenPort()), !fBound ? BF_REPORT_ERROR : BF_NONE);
          }
          if (!fBound)
              return InitError(_("Failed to listen on any port. Use -listen=0 if you want this."));
      }
  
      if (mapArgs.count("-externalip")) {
          BOOST_FOREACH(const std::string& strAddr, mapMultiArgs["-externalip"]) {
              CService addrLocal(strAddr, GetListenPort(), fNameLookup);
              if (!addrLocal.IsValid())
                  return InitError(strprintf(_("Cannot resolve -externalip address: '%s'"), strAddr));
              AddLocal(CService(strAddr, GetListenPort(), fNameLookup), LOCAL_MANUAL);
          }
      }
  
      BOOST_FOREACH(const std::string& strDest, mapMultiArgs["-seednode"])
          AddOneShot(strDest);
  
  #if ENABLE_ZMQ
      pzmqNotificationInterface = CZMQNotificationInterface::CreateWithArguments(mapArgs);
  
      if (pzmqNotificationInterface) {
          RegisterValidationInterface(pzmqNotificationInterface);
      }
  #endif
      if (mapArgs.count("-maxuploadtarget")) {
          CNode::SetMaxOutboundTarget(GetArg("-maxuploadtarget", DEFAULT_MAX_UPLOAD_TARGET)*1024*1024);
      }
  
      // ********************************************************* Step 7: load block chain
  
      fReindex = GetBoolArg("-reindex", false);
  
      // Upgrading to 0.8; hard-link the old blknnnn.dat files into /blocks/
      boost::filesystem::path blocksDir = GetDataDir() / "blocks";
      if (!boost::filesystem::exists(blocksDir))
      {
          boost::filesystem::create_directories(blocksDir);
          bool linked = false;
          for (unsigned int i = 1; i < 10000; i++) {
              boost::filesystem::path source = GetDataDir() / strprintf("blk%04u.dat", i);
              if (!boost::filesystem::exists(source)) break;
              boost::filesystem::path dest = blocksDir / strprintf("blk%05u.dat", i-1);
              try {
                  boost::filesystem::create_hard_link(source, dest);
                  LogPrintf("Hardlinked %s -> %s\n", source.string(), dest.string());
                  linked = true;
              } catch (const boost::filesystem::filesystem_error& e) {
                  // Note: hardlink creation failing is not a disaster, it just means
                  // blocks will get re-downloaded from peers.
                  LogPrintf("Error hardlinking blk%04u.dat: %s\n", i, e.what());
                  break;
              }
          }
          if (linked)
          {
              fReindex = true;
          }
      }
  
      // cache size calculations
      int64_t nTotalCache = (GetArg("-dbcache", nDefaultDbCache) << 20);
      nTotalCache = std::max(nTotalCache, nMinDbCache << 20); // total cache cannot be less than nMinDbCache
      nTotalCache = std::min(nTotalCache, nMaxDbCache << 20); // total cache cannot be greated than nMaxDbcache
      int64_t nBlockTreeDBCache = nTotalCache / 8;
      if (nBlockTreeDBCache > (1 << 21) && !GetBoolArg("-txindex", DEFAULT_TXINDEX))
          nBlockTreeDBCache = (1 << 21); // block tree db cache shouldn't be larger than 2 MiB
      nTotalCache -= nBlockTreeDBCache;
      int64_t nCoinDBCache = std::min(nTotalCache / 2, (nTotalCache / 4) + (1 << 23)); // use 25%-50% of the remainder for disk cache
      nTotalCache -= nCoinDBCache;
      nCoinCacheUsage = nTotalCache; // the rest goes to in-memory cache
      LogPrintf("Cache configuration:\n");
      LogPrintf("* Using %.1fMiB for block index database\n", nBlockTreeDBCache * (1.0 / 1024 / 1024));
      LogPrintf("* Using %.1fMiB for chain state database\n", nCoinDBCache * (1.0 / 1024 / 1024));
      LogPrintf("* Using %.1fMiB for in-memory UTXO set\n", nCoinCacheUsage * (1.0 / 1024 / 1024));
  
      bool fLoaded = false;
      while (!fLoaded) {
          bool fReset = fReindex;
          std::string strLoadError;
  
          uiInterface.InitMessage(_("Loading block index..."));
  
          nStart = GetTimeMillis();
          do {
              try {
                  UnloadBlockIndex();
                  delete pcoinsTip;
                  delete pcoinsdbview;
                  delete pcoinscatcher;
                  delete pblocktree;
  
                  pblocktree = new CBlockTreeDB(nBlockTreeDBCache, false, fReindex);
                  pcoinsdbview = new CCoinsViewDB(nCoinDBCache, false, fReindex);
                  pcoinscatcher = new CCoinsViewErrorCatcher(pcoinsdbview);
                  pcoinsTip = new CCoinsViewCache(pcoinscatcher);
  
                  if (fReindex) {
                      pblocktree->WriteReindexing(true);
                      //If we're reindexing in prune mode, wipe away unusable block files and all undo data files
                      if (fPruneMode)
                          CleanupBlockRevFiles();
                  }
  
                  if (!LoadBlockIndex()) {
                      strLoadError = _("Error loading block database");
                      break;
                  }
  
                  // If the loaded chain has a wrong genesis, bail out immediately
                  // (we're likely using a testnet datadir, or the other way around).
                  if (!mapBlockIndex.empty() && mapBlockIndex.count(chainparams.GetConsensus().hashGenesisBlock) == 0)
                      return InitError(_("Incorrect or no genesis block found. Wrong datadir for network?"));
  
                  // Initialize the block index (no-op if non-empty database was already loaded)
                  if (!InitBlockIndex(chainparams)) {
                      strLoadError = _("Error initializing block database");
                      break;
                  }
  
                  // Check for changed -txindex state
                  if (fTxIndex != GetBoolArg("-txindex", DEFAULT_TXINDEX)) {
                      strLoadError = _("You need to rebuild the database using -reindex to change -txindex");
                      break;
                  }
  
                  // Check for changed -prune state.  What we are concerned about is a user who has pruned blocks
                  // in the past, but is now trying to run unpruned.
                  if (fHavePruned && !fPruneMode) {
                      strLoadError = _("You need to rebuild the database using -reindex to go back to unpruned mode.  This will redownload the entire blockchain");
                      break;
                  }
  
                  uiInterface.InitMessage(_("Verifying blocks..."));
                  if (fHavePruned && GetArg("-checkblocks", DEFAULT_CHECKBLOCKS) > MIN_BLOCKS_TO_KEEP) {
                      LogPrintf("Prune: pruned datadir may not have more than %d blocks; only checking available blocks",
                          MIN_BLOCKS_TO_KEEP);
                  }
  
                  {
                      LOCK(cs_main);
                      CBlockIndex* tip = chainActive.Tip();
                      if (tip && tip->nTime > GetAdjustedTime() + 2 * 60 * 60) {
                          strLoadError = _("The block database contains a block which appears to be from the future. "
                                  "This may be due to your computer's date and time being set incorrectly. "
                                  "Only rebuild the block database if you are sure that your computer's date and time are correct");
                          break;
                      }
                  }
  
                  if (!CVerifyDB().VerifyDB(chainparams, pcoinsdbview, GetArg("-checklevel", DEFAULT_CHECKLEVEL),
                                GetArg("-checkblocks", DEFAULT_CHECKBLOCKS))) {
                      strLoadError = _("Corrupted block database detected");
                      break;
                  }
              } catch (const std::exception& e) {
                  if (fDebug) LogPrintf("%s\n", e.what());
                  strLoadError = _("Error opening block database");
                  break;
              }
  
              fLoaded = true;
          } while(false);
  
          if (!fLoaded) {
              // first suggest a reindex
              if (!fReset) {
                  bool fRet = uiInterface.ThreadSafeMessageBox(
                      strLoadError + ".\n\n" + _("Do you want to rebuild the block database now?"),
                      "", CClientUIInterface::MSG_ERROR | CClientUIInterface::BTN_ABORT);
                  if (fRet) {
                      fReindex = true;
                      fRequestShutdown = false;
                  } else {
                      LogPrintf("Aborted block database rebuild. Exiting.\n");
                      return false;
                  }
              } else {
                  return InitError(strLoadError);
              }
          }
      }
  
      // As LoadBlockIndex can take several minutes, it's possible the user
      // requested to kill the GUI during the last operation. If so, exit.
      // As the program has not fully started yet, Shutdown() is possibly overkill.
      if (fRequestShutdown)
      {
          LogPrintf("Shutdown requested. Exiting.\n");
          return false;
      }
      LogPrintf(" block index %15dms\n", GetTimeMillis() - nStart);
  
      boost::filesystem::path est_path = GetDataDir() / FEE_ESTIMATES_FILENAME;
      CAutoFile est_filein(fopen(est_path.string().c_str(), "rb"), SER_DISK, CLIENT_VERSION);
      // Allowed to fail as this file IS missing on first startup.
      if (!est_filein.IsNull())
          mempool.ReadFeeEstimates(est_filein);
      fFeeEstimatesInitialized = true;
  
      // ********************************************************* Step 8: load wallet
  #ifdef ENABLE_WALLET
      if (fDisableWallet) {
          pwalletMain = NULL;
          LogPrintf("Wallet disabled!\n");
      } else {
          CWallet::InitLoadWallet();
          if (!pwalletMain)
              return false;
      }
  #else // ENABLE_WALLET
      LogPrintf("No wallet support compiled in!\n");
  #endif // !ENABLE_WALLET
  
      // ********************************************************* Step 9: data directory maintenance
  
      // if pruning, unset the service bit and perform the initial blockstore prune
      // after any wallet rescanning has taken place.
      if (fPruneMode) {
          LogPrintf("Unsetting NODE_NETWORK on prune mode\n");
          nLocalServices &= ~NODE_NETWORK;
          if (!fReindex) {
              uiInterface.InitMessage(_("Pruning blockstore..."));
              PruneAndFlush();
          }
      }
  
      // ********************************************************* Step 10: import blocks
  
      if (mapArgs.count("-blocknotify"))
          uiInterface.NotifyBlockTip.connect(BlockNotifyCallback);
  
      uiInterface.InitMessage(_("Activating best chain..."));
      // scan for better chains in the block chain database, that are not yet connected in the active best chain
      CValidationState state;
      if (!ActivateBestChain(state, chainparams))
          strErrors << "Failed to connect best block";
      IsChainNearlySyncdInit(); // BUIP010 XTHIN: initialize fIsChainNearlySyncd
      IsInitialBlockDownloadInit();
  
      std::vector<boost::filesystem::path> vImportFiles;
      if (mapArgs.count("-loadblock"))
      {
          BOOST_FOREACH(const std::string& strFile, mapMultiArgs["-loadblock"])
              vImportFiles.push_back(strFile);
      }
      threadGroup.create_thread(boost::bind(&ThreadImport, vImportFiles));
      if (chainActive.Tip() == NULL) {
          LogPrintf("Waiting for genesis block to be imported...\n");
          while (!fRequestShutdown && chainActive.Tip() == NULL)
              MilliSleep(10);
      }
  
      // ********************************************************* Step 11: start node
  
      if (!CheckDiskSpace())
          return false;
  
      if (!strErrors.str().empty())
          return InitError(strErrors.str());
  
      RandAddSeedPerfmon();
  
      //// debug print
      LogPrintf("mapBlockIndex.size() = %u\n",   mapBlockIndex.size());
      LogPrintf("nBestHeight = %d\n",                   chainActive.Height());
  #ifdef ENABLE_WALLET
      LogPrintf("setKeyPool.size() = %u\n",      pwalletMain ? pwalletMain->setKeyPool.size() : 0);
      LogPrintf("mapWallet.size() = %u\n",       pwalletMain ? pwalletMain->mapWallet.size() : 0);
      LogPrintf("mapAddressBook.size() = %u\n",  pwalletMain ? pwalletMain->mapAddressBook.size() : 0);
  #endif
  
      if (GetBoolArg("-listenonion", DEFAULT_LISTEN_ONION))
          StartTorControl(threadGroup, scheduler);
  
      StartNode(threadGroup, scheduler);
  
      // Monitor the chain, and alert if we get blocks much quicker or slower than expected
      // The "bad chain alert" scheduler has been disabled because the current system gives far
      // too many false positives, such that users are starting to ignore them.
      // This code will be disabled for 0.12.1 while a fix is deliberated in #7568
      // this was discussed in the IRC meeting on 2016-03-31.
      //
      // --- disabled ---
      //int64_t nPowTargetSpacing = Params().GetConsensus().nPowTargetSpacing;
      //CScheduler::Function f = boost::bind(&PartitionCheck, &IsInitialBlockDownload,
      //                                     boost::ref(cs_main), boost::cref(pindexBestHeader), nPowTargetSpacing);
      //scheduler.scheduleEvery(f, nPowTargetSpacing);
      // --- end disabled ---
  
      // ********************************************************* Step 12: finished
  
      SetRPCWarmupFinished();
      uiInterface.InitMessage(_("Done loading"));
  
  #ifdef ENABLE_WALLET
      if (pwalletMain) {
          // Add wallet transactions that aren't already in a block to mapTransactions
          pwalletMain->ReacceptWalletTransactions();
  
          // Run a thread to flush wallet periodically
          threadGroup.create_thread(boost::bind(&ThreadFlushWalletDB, boost::ref(pwalletMain->strWalletFile)));
      }
  #endif
  
      return !fRequestShutdown;
  }
  