text: // Copyright (c) 2009-2010 Satoshi Nakamoto
  // Copyright (c) 2009-2015 The Bitcoin developers
  // Copyright (c) 2014-2015 The Dash developers
  // Copyright (c) 2011-2013 The PPCoin developers
  // Copyright (c) 2013-2014 The NovaCoin Developers
  // Copyright (c) 2014-2018 The BlackCoin Developers
  // Copyright (c) 2015-2020 The PIVX developers
  // Copyright (c) 2020 The YEP 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/yep-config.h"
  #endif
  
  #include "init.h"
  
  #include "activemasternode.h"
  #include "addrman.h"
  #include "amount.h"
  #include "checkpoints.h"
  #include "compat/sanity.h"
  #include "consensus/upgrades.h"
  #include "consensus/zerocoin_verify.h"
  #include "fs.h"
  #include "httpserver.h"
  #include "httprpc.h"
  #include "invalid.h"
  #include "key.h"
  #include "main.h"
  #include "masternode-budget.h"
  #include "masternode-payments.h"
  #include "masternodeconfig.h"
  #include "masternodeman.h"
  #include "messagesigner.h"
  #include "miner.h"
  #include "netbase.h"
  #include "net.h"
  #include "policy/policy.h"
  #include "rpc/server.h"
  #include "script/standard.h"
  #include "scheduler.h"
  #include "spork.h"
  #include "sporkdb.h"
  #include "txdb.h"
  #include "torcontrol.h"
  #include "guiinterface.h"
  #include "guiinterfaceutil.h"
  #include "util.h"
  #include "utilmoneystr.h"
  #include "util/threadnames.h"
  #include "validationinterface.h"
  #include "zyepchain.h"
  
  // Sapling
  #include "sapling/util.h"
  #include <librustzcash.h>
  
  #ifdef ENABLE_WALLET
  #include "wallet/db.h"
  #include "wallet/wallet.h"
  #include "wallet/walletdb.h"
  #include "wallet/rpcwallet.h"
  
  #endif
  
  #include <fstream>
  #include <stdint.h>
  #include <stdio.h>
  #include <memory>
  
  #ifndef WIN32
  #include <signal.h>
  #endif
  
  #include <boost/algorithm/string.hpp>
  #include <boost/algorithm/string/split.hpp>
  
  #include <boost/algorithm/string/predicate.hpp>
  #include <boost/algorithm/string/replace.hpp>
  #include <boost/interprocess/sync/file_lock.hpp>
  #include <boost/thread.hpp>
  #include <boost/foreach.hpp>
  
  #if ENABLE_ZMQ
  #include "zmq/zmqnotificationinterface.h"
  #endif
  
  
  #ifdef ENABLE_WALLET
  int nWalletBackups = 10;
  #endif
  volatile bool fFeeEstimatesInitialized = false;
  volatile bool fRestartRequested = false; // true: restart false: shutdown
  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;
  static const bool DEFAULT_MASTERNODE  = false;
  static const bool DEFAULT_MNCONFLOCK = true;
  
  std::unique_ptr<CConnman> g_connman;
  
  #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 to 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;
  
  //////////////////////////////////////////////////////////////////////////////
  //
  // 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.
  //
  // 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 || fRestartRequested;
  }
  
  class CCoinsViewErrorCatcher : public CCoinsViewBacked
  {
  public:
      CCoinsViewErrorCatcher(CCoinsView* view) : CCoinsViewBacked(view) {}
      bool GetCoin(const COutPoint& outpoint, Coin& coin) const override
      {
          try {
              return CCoinsViewBacked::GetCoin(outpoint, coin);
          } 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 interpration. 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;
  
  static boost::thread_group threadGroup;
  static CScheduler scheduler;
  void Interrupt()
  {
      InterruptHTTPServer();
      InterruptHTTPRPC();
      InterruptRPC();
      InterruptREST();
      InterruptTorControl();
      if (g_connman)
          g_connman->Interrupt();
  }
  
  /** Preparing steps before shutting down or restarting the wallet */
  void PrepareShutdown()
  {
      fRequestShutdown = true;  // Needed when we shutdown the wallet
      fRestartRequested = true; // Needed when we restart the wallet
      LogPrintf("%s: In progress...\n", __func__);
      static RecursiveMutex cs_Shutdown;
      TRY_LOCK(cs_Shutdown, lockShutdown);
      if (!lockShutdown)
          return;
  
      /// Note: Shutdown() must be able to handle cases in which initialization 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.
      util::ThreadRename("yep-shutoff");
      mempool.AddTransactionsUpdated(1);
      StopHTTPRPC();
      StopREST();
      StopRPC();
      StopHTTPServer();
  #ifdef ENABLE_WALLET
      if (pwalletMain)
          bitdb.Flush(false);
      GenerateBitcoins(false, NULL, 0);
  #endif
      MapPort(false);
      g_connman.reset();
  
      DumpMasternodes();
      DumpBudgets();
      DumpMasternodePayments();
      UnregisterNodeSignals(GetNodeSignals());
  
      // After everything has been shut down, but before things get flushed, stop the
      // CScheduler/checkqueue threadGroup
      threadGroup.interrupt_all();
      threadGroup.join_all();
  
      if (fFeeEstimatesInitialized) {
          fs::path est_path = GetDataDir() / FEE_ESTIMATES_FILENAME;
          CAutoFile est_fileout(fsbridge::fopen(est_path, "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();
  
              //record that client took the proper shutdown procedure
              pblocktree->WriteFlag("shutdown", true);
          }
          delete pcoinsTip;
          pcoinsTip = NULL;
          delete pcoinscatcher;
          pcoinscatcher = NULL;
          delete pcoinsdbview;
          pcoinsdbview = NULL;
          delete pblocktree;
          pblocktree = NULL;
          delete zerocoinDB;
          zerocoinDB = NULL;
          delete pSporkDB;
          pSporkDB = NULL;
      }
  #ifdef ENABLE_WALLET
      if (pwalletMain)
          bitdb.Flush(true);
  #endif
  
  #if ENABLE_ZMQ
      if (pzmqNotificationInterface) {
          UnregisterValidationInterface(pzmqNotificationInterface);
          delete pzmqNotificationInterface;
          pzmqNotificationInterface = NULL;
      }
  #endif
  
      // Disconnect all slots
      UnregisterAllValidationInterfaces();
  
  #ifndef WIN32
      try {
          fs::remove(GetPidFile());
      } catch (const fs::filesystem_error& e) {
          LogPrintf("%s: Unable to remove pidfile: %s\n", __func__, e.what());
      }
  #endif
  }
  
  /**
  * Shutdown is split into 2 parts:
  * Part 1: shut down everything but the main wallet instance (done in PrepareShutdown() )
  * Part 2: delete wallet instance
  *
  * In case of a restart PrepareShutdown() was already called before, but this method here gets
  * called implicitly when the parent object is deleted. In this case we have to skip the
  * PrepareShutdown() part because it was already executed and just delete the wallet instance.
  */
  void Shutdown()
  {
      // Shutdown part 1: prepare shutdown
      if (!fRestartRequested) {
          PrepareShutdown();
      }
      // Shutdown part 2: Stop TOR thread and delete wallet instance
      StopTorControl();
  #ifdef ENABLE_WALLET
      delete pwalletMain;
      pwalletMain = NULL;
  #endif
      globalVerifyHandle.reset();
      ECC_Stop();
      LogPrintf("%s: done\n", __func__);
  }
  
  /**
   * Signal handlers are very limited in what they are allowed to do, so:
   */
  void HandleSIGTERM(int)
  {
      StartShutdown();
  }
  
  void HandleSIGHUP(int)
  {
      g_logger->m_reopen_file = true;
  }
  
  #ifndef WIN32
  static void registerSignalHandler(int signal, void(*handler)(int))
  {
      struct sigaction sa;
      sa.sa_handler = handler;
      sigemptyset(&sa.sa_mask);
      sa.sa_flags = 0;
      sigaction(signal, &sa, nullptr);
  }
  #endif
  
  bool static Bind(CConnman& connman, const CService& addr, unsigned int flags)
  {
      if (!(flags & BF_EXPLICIT) && IsLimited(addr))
          return false;
      std::string strError;
      if (!connman.BindListenPort(addr, strError, (flags & BF_WHITELIST) != 0)) {
          if (flags & BF_REPORT_ERROR)
              return UIError(strError);
          return false;
      }
      return true;
  }
  
  void OnRPCStarted()
  {
      uiInterface.NotifyBlockTip.connect(RPCNotifyBlockChange);
  }
  
  void OnRPCStopped()
  {
      uiInterface.NotifyBlockTip.disconnect(RPCNotifyBlockChange);
      //RPCNotifyBlockChange(0);
      g_best_block_cv.notify_all();
      LogPrint(BCLog::RPC, "RPC stopped.\n");
  }
  
  void OnRPCPreCommand(const CRPCCommand& cmd)
  {
      // Observe safe mode
      std::string strWarning = GetWarnings("rpc");
      if (strWarning != "" && !GetBoolArg("-disablesafemode", DEFAULT_DISABLE_SAFEMODE) &&
          !cmd.okSafeMode)
          throw JSONRPCError(RPC_FORBIDDEN_BY_SAFE_MODE, std::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.
      std::string strUsage = HelpMessageGroup(_("Options:"));
      strUsage += HelpMessageOpt("-?", _("This help message"));
      strUsage += HelpMessageOpt("-version", _("Print version and exit"));
      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)"));
      strUsage += HelpMessageOpt("-blocksizenotify=<cmd>", _("Execute command when the best block changes and its size is over (%s in cmd is replaced by block hash, %d with the block size)"));
      strUsage += HelpMessageOpt("-checkblocks=<n>", strprintf(_("How many blocks to check at startup (default: %u, 0 = all)"), DEFAULT_CHECKBLOCKS));
      strUsage += HelpMessageOpt("-conf=<file>", strprintf(_("Specify configuration file (default: %s)"), YEP_CONF_FILENAME));
      if (mode == HMM_BITCOIND) {
  #if !defined(WIN32)
          strUsage += HelpMessageOpt("-daemon", _("Run in the background as a daemon and accept commands"));
  #endif
      }
      strUsage += HelpMessageOpt("-datadir=<dir>", _("Specify data directory"));
      strUsage += HelpMessageOpt("-paramsdir=<dir>", strprintf(_("Specify zk params directory (default: %s)"), ZC_GetParamsDir().string()));
      strUsage += HelpMessageOpt("-debuglogfile=<file>", strprintf(_("Specify location of debug log file: this can be an absolute path or a path relative to the data directory (default: %s)"), DEFAULT_DEBUGLOGFILE));
      strUsage += HelpMessageOpt("-disablesystemnotifications", strprintf(_("Disable OS notifications for incoming transactions (default: %u)"), 0));
      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("-maxreorg=<n>", strprintf(_("Set the Maximum reorg depth (default: %u)"), DEFAULT_MAX_REORG_DEPTH));
      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)"), YEP_PID_FILENAME));
  #endif
      strUsage += HelpMessageOpt("-reindex", _("Rebuild block chain index from current blk000??.dat files") + " " + _("on startup"));
      strUsage += HelpMessageOpt("-reindexmoneysupply", strprintf(_("Reindex the %s and z%s money supply statistics"), CURRENCY_UNIT, CURRENCY_UNIT) + " " + _("on startup"));
      strUsage += HelpMessageOpt("-resync", _("Delete blockchain folders and resync from scratch") + " " + _("on startup"));
  #if !defined(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 += HelpMessageOpt("-forcestart", _("Attempt to force blockchain corruption recovery") + " " + _("on startup"));
  
      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); -noconnect or -connect=0 alone to disable automatic connections"));
      strUsage += HelpMessageOpt("-discover", _("Discover own IP address (default: 1 when listening and no -externalip)"));
      strUsage += HelpMessageOpt("-dns", strprintf(_("Allow DNS lookups for -addnode, -seednode and -connect (default: %u)"), DEFAULT_NAME_LOOKUP));
      strUsage += HelpMessageOpt("-dnsseed", _("Query for peer addresses via DNS lookup, if low on addresses (default: 1 unless -connect/-noconnect)"));
      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", strprintf(_("Accept connections from outside (default: %u if no -proxy or -connect/-noconnect)"), DEFAULT_LISTEN));
      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)"), DEFAULT_PEERBLOOMFILTERS));
      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)"));
      strUsage += HelpMessageOpt("-upnp", strprintf(_("Use UPnP to map the listening port (default: %u)"), DEFAULT_UPNP));
      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"));
  
  #if ENABLE_WALLET
      strUsage += CWallet::GetWalletHelpString(showDebug);
  #endif
  
      if (mode == HMM_BITCOIN_QT) {
          strUsage += HelpMessageOpt("-windowtitle=<name>", _("Wallet window title"));
      }
  
  #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("-zmqpubhashtxlock=<address>", _("Enable publish hash transaction (locked via SwiftX) in <address>"));
      strUsage += HelpMessageOpt("-zmqpubrawblock=<address>", _("Enable publish raw block in <address>"));
      strUsage += HelpMessageOpt("-zmqpubrawtx=<address>", _("Enable publish raw transaction in <address>"));
      strUsage += HelpMessageOpt("-zmqpubrawtxlock=<address>", _("Enable publish raw transaction (locked via SwiftX) 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(_("Only accept block chain matching built-in checkpoints (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("-deprecatedrpc=<method>", _("Allows deprecated RPC method(s) to be used"));
          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));
          strUsage += HelpMessageOpt("-sporkkey=<privkey>", _("Enable spork administration functionality with the appropriate private key."));
          strUsage += HelpMessageOpt("-nuparams=upgradeName:activationHeight", "Use given activation height for specified network upgrade (regtest-only)");
      }
      strUsage += HelpMessageOpt("-debug=<category>", strprintf(_("Output debugging information (default: %u, supplying <category> is optional)"), 0) + ". " +
          _("If <category> is not supplied, output all debugging information.") + _("<category> can be:") + " " + ListLogCategories() + ".");
      strUsage += HelpMessageOpt("-debugexclude=<category>", _("Exclude debugging information for a category. Can be used in conjunction with -debug=1 to output debug logs for all categories except one or more specified categories."));
      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));
      strUsage += HelpMessageOpt("-logtimemicros", strprintf("Add microsecond precision to debug timestamps (default: %u)", DEFAULT_LOGTIMEMICROS));
      if (showDebug) {
          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("-maxtipage=<n>", strprintf("Maximum tip age in seconds to consider node in initial block download (default: %u)", DEFAULT_MAX_TIP_AGE));
      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(::minRelayTxFee.GetFeePerK())));
      strUsage += HelpMessageOpt("-printtoconsole", strprintf(_("Send trace/debug info to console instead of debug.log file (default: %u)"), 0));
      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.") + " " +
              _("In this mode -genproclimit controls how many blocks are generated immediately."));
      }
      strUsage += HelpMessageOpt("-shrinkdebugfile", _("Shrink debug.log file on client startup (default: 1 when no -debug)"));
      strUsage += HelpMessageOpt("-testnet", _("Use the test network"));
      strUsage += HelpMessageOpt("-litemode=<n>", strprintf(_("Disable all YEP specific functionality (Masternodes, Zerocoin, SwiftX, Budgeting) (0-1, default: %u)"), 0));
  
      strUsage += HelpMessageGroup(_("Masternode options:"));
      strUsage += HelpMessageOpt("-masternode=<n>", strprintf(_("Enable the client to act as a masternode (0-1, default: %u)"), DEFAULT_MASTERNODE));
      strUsage += HelpMessageOpt("-mnconf=<file>", strprintf(_("Specify masternode configuration file (default: %s)"), YEP_MASTERNODE_CONF_FILENAME));
      strUsage += HelpMessageOpt("-mnconflock=<n>", strprintf(_("Lock masternodes from masternode configuration file (default: %u)"), DEFAULT_MNCONFLOCK));
      strUsage += HelpMessageOpt("-masternodeprivkey=<n>", _("Set the masternode private key"));
      strUsage += HelpMessageOpt("-masternodeaddr=<n>", strprintf(_("Set external address:port to get to this masternode (example: %s)"), "128.127.106.235:16740"));
      strUsage += HelpMessageOpt("-budgetvotemode=<mode>", _("Change automatic finalized budget voting behavior. mode=auto: Vote for only exact finalized budget match to my generated budget. (string, default: auto)"));
  
      strUsage += HelpMessageGroup(_("Zerocoin options:"));
      strUsage += HelpMessageOpt("-reindexzerocoin=<n>", strprintf(_("Delete all zerocoin spends and mints that have been recorded to the blockchain database and reindex them (0-1, default: %u)"), 0));
  
      strUsage += HelpMessageGroup(_("SwiftX options:"));
      strUsage += HelpMessageOpt("-enableswifttx=<n>", strprintf(_("Enable SwiftX, show confirmations for locked transactions (bool, default: %s)"), "true"));
      strUsage += HelpMessageOpt("-swifttxdepth=<n>", strprintf(_("Show N confirmations for a successfully locked transaction (0-9999, default: %u)"), nSwiftTXDepth));
  
      strUsage += HelpMessageGroup(_("Node relay options:"));
      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));
      if (showDebug) {
          strUsage += HelpMessageOpt("-blockversion=<n>", "Override block version to test forking scenarios");
      }
  
      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));
  
      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("-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));
      }
  
      strUsage += HelpMessageOpt("-blockspamfilter=<n>", strprintf(_("Use block spam filter (default: %u)"), DEFAULT_BLOCK_SPAM_FILTER));
      strUsage += HelpMessageOpt("-blockspamfiltermaxsize=<n>", strprintf(_("Maximum size of the list of indexes in the block spam filter (default: %u)"), DEFAULT_BLOCK_SPAM_FILTER_MAX_SIZE));
      strUsage += HelpMessageOpt("-blockspamfiltermaxavg=<n>", strprintf(_("Maximum average size of an index occurrence in the block spam filter (default: %u)"), DEFAULT_BLOCK_SPAM_FILTER_MAX_AVG));
  
      return strUsage;
  }
  
  std::string LicenseInfo()
  {
      return FormatParagraph(strprintf(_("Copyright (C) 2009-%i The Bitcoin Core Developers"), COPYRIGHT_YEAR)) + "\n" +
             "\n" +
             FormatParagraph(strprintf(_("Copyright (C) 2014-%i The Dash Core Developers"), COPYRIGHT_YEAR)) + "\n" +
             "\n" +
             FormatParagraph(strprintf(_("Copyright (C) 2015-%i The PIVX Core Developers"), COPYRIGHT_YEAR)) + "\n" +
             "\n" +
             FormatParagraph(strprintf(_("Copyright (C) %i The YEP Core Developers"), COPYRIGHT_YEAR)) + "\n" +
             "\n" +
             FormatParagraph(_("This is experimental software.")) + "\n" +
             "\n" +
             FormatParagraph(_("Distributed under the MIT software license, see the accompanying file COPYING or <http://www.opensource.org/licenses/mit-license.php>.")) + "\n" +
             "\n" +
             FormatParagraph(_("This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit <https://www.openssl.org/> and cryptographic software written by Eric Young and UPnP software written by Thomas Bernard.")) +
             "\n";
  }
  
  static void BlockNotifyCallback(bool initialSync, const CBlockIndex *pBlockIndex)
  {
  
      if (initialSync || !pBlockIndex)
          return;
  
      std::string strCmd = GetArg("-blocknotify", "");
  
      if (!strCmd.empty()) {
          boost::replace_all(strCmd, "%s", pBlockIndex->GetBlockHash().GetHex());
          std::thread t(runCommand, strCmd);
          t.detach(); // thread runs free
      }
  }
  
  static void BlockSizeNotifyCallback(int size, const uint256& hashNewTip)
  {
      std::string strCmd = GetArg("-blocksizenotify", "");
  
      boost::replace_all(strCmd, "%s", hashNewTip.GetHex());
      boost::replace_all(strCmd, "%d", std::to_string(size));
      boost::thread t(runCommand, strCmd); // thread runs free
  }
  
  ////////////////////////////////////////////////////
  
  static bool fHaveGenesis = false;
  static std::mutex cs_GenesisWait;
  static std::condition_variable condvar_GenesisWait;
  
  static void BlockNotifyGenesisWait(bool, const CBlockIndex *pBlockIndex)
  {
      if (pBlockIndex != nullptr) {
          {
              std::unique_lock<std::mutex> lock_GenesisWait(cs_GenesisWait);
              fHaveGenesis = true;
          }
          condvar_GenesisWait.notify_all();
      }
  }
  
  ////////////////////////////////////////////////////
  
  
  struct CImportingNow {
      CImportingNow()
      {
          assert(fImporting == false);
          fImporting = true;
      }
  
      ~CImportingNow()
      {
          assert(fImporting == true);
          fImporting = false;
      }
  };
  
  void ThreadImport(std::vector<fs::path> vImportFiles)
  {
      util::ThreadRename("yep-loadblk");
  
      // -reindex
      if (fReindex) {
          CImportingNow imp;
          int nFile = 0;
          while (true) {
              CDiskBlockPos pos(nFile, 0);
              if (!fs::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(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();
      }
  
      // hardcoded $DATADIR/bootstrap.dat
      fs::path pathBootstrap = GetDataDir() / "bootstrap.dat";
      if (fs::exists(pathBootstrap)) {
          FILE* file = fsbridge::fopen(pathBootstrap, "rb");
          if (file) {
              CImportingNow imp;
              fs::path pathBootstrapOld = GetDataDir() / "bootstrap.dat.old";
              LogPrintf("Importing bootstrap.dat...\n");
              LoadExternalBlockFile(file);
              RenameOver(pathBootstrap, pathBootstrapOld);
          } else {
              LogPrintf("Warning: Could not open bootstrap file %s\n", pathBootstrap.string());
          }
      }
  
      // -loadblock=
      for (fs::path& path : vImportFiles) {
          FILE* file = fsbridge::fopen(path, "rb");
          if (file) {
              CImportingNow imp;
              LogPrintf("Importing blocks file %s...\n", path.string());
              LoadExternalBlockFile(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 PIVX is running in a usable environment with all
   *  necessary library support.
   */
  bool InitSanityCheck(void)
  {
      if (!ECC_InitSanityCheck()) {
          UIError("Elliptic curve cryptography sanity check failure. Aborting.");
          return false;
      }
  
      if (!glibc_sanity_test() || !glibcxx_sanity_test())
          return false;
  
      if (!Random_SanityCheck()) {
          UIError("OS cryptographic RNG sanity check failure. Aborting.");
          return false;
      }
  
      return true;
  }
  
  static void LoadSaplingParams()
  {
      struct timeval tv_start, tv_end;
      float elapsed;
      gettimeofday(&tv_start, 0);
  
      try {
          initZKSNARKS();
      } catch (std::runtime_error &e) {
          uiInterface.ThreadSafeMessageBox(strprintf(
                  _("Cannot find the Sapling parameters in the following directory:\n"
                    "%s\n"
                    "Please run 'sapling-fetch-params' or './util/fetch-params.sh' and then restart."),
                  ZC_GetParamsDir()),
                                           "", CClientUIInterface::MSG_ERROR);
          StartShutdown();
          return;
      }
  
      gettimeofday(&tv_end, 0);
      elapsed = float(tv_end.tv_sec-tv_start.tv_sec) + (tv_end.tv_usec-tv_start.tv_usec)/float(1000000);
      LogPrintf("Loaded Sapling parameters in %fs seconds.\n", elapsed);
  }
  
  bool AppInitServers()
  {
      RPCServer::OnStarted(&OnRPCStarted);
      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;
  }
  
  [[noreturn]] static void new_handler_terminate()
  {
      // Rather than throwing std::bad-alloc if allocation fails, terminate
      // immediately to (try to) avoid chain corruption.
      // Since LogPrintf may itself allocate memory, set the handler directly
      // to terminate first.
      std::set_new_handler(std::terminate);
      LogPrintf("Error: Out of memory. Terminating.\n");
  
      // The log was successful, terminate now.
      std::terminate();
  };
  
  bool AppInitBasicSetup()
  {
  // ********************************************************* 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 UIError("Error: Initializing networking failed");
  
  #ifndef WIN32
      if (GetBoolArg("-sysperms", false)) {
  #ifdef ENABLE_WALLET
          if (!GetBoolArg("-disablewallet", false))
              return UIError("Error: -sysperms is not allowed in combination with enabled wallet functionality");
  #endif
      } else {
          umask(077);
      }
  
      // Clean shutdown on SIGTERMx
      registerSignalHandler(SIGTERM, HandleSIGTERM);
      registerSignalHandler(SIGINT, HandleSIGTERM);
  
      // Reopen debug.log on SIGHUP
      registerSignalHandler(SIGHUP, HandleSIGHUP);
  
      // Ignore SIGPIPE, otherwise it will bring the daemon down if the client closes unexpectedly
      signal(SIGPIPE, SIG_IGN);
  #endif
  
      std::set_new_handler(new_handler_terminate);
  
      return true;
  }
  
  // Parameter interaction based on rules
  void InitParameterInteraction()
  {
      if (mapArgs.count("-bind") || mapArgs.count("-whitebind")) {
          // when specifying an explicit binding address, you want to listen on it
          // even when -connect or -proxy is specified
          if (SoftSetBoolArg("-listen", true))
              LogPrintf("%s : parameter interaction: -bind or -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__);
      }
  
      if (!GetBoolArg("-enableswifttx", fEnableSwiftTX)) {
          if (SoftSetArg("-swifttxdepth", "0"))
              LogPrintf("%s : parameter interaction: -enableswifttx=false -> setting -nSwiftTXDepth=0\n", __func__);
      }
  }
  
  bool InitNUParams()
  {
      if (!mapMultiArgs["-nuparams"].empty()) {
          // Allow overriding network upgrade parameters for testing
          if (Params().NetworkIDString() != "regtest") {
              return UIError("Network upgrade parameters may only be overridden on regtest.");
          }
          const std::vector<std::string>& deployments = mapMultiArgs["-nuparams"];
          for (auto i : deployments) {
              std::vector<std::string> vDeploymentParams;
              boost::split(vDeploymentParams, i, boost::is_any_of(":"));
              if (vDeploymentParams.size() != 2) {
                  return UIError("Network upgrade parameters malformed, expecting hexBranchId:activationHeight");
              }
              int nActivationHeight;
              if (!ParseInt32(vDeploymentParams[1], &nActivationHeight)) {
                  return UIError(strprintf("Invalid nActivationHeight (%s)", vDeploymentParams[1]));
              }
              bool found = false;
              // Exclude base network from upgrades
              for (auto j = Consensus::BASE_NETWORK + 1; j < Consensus::MAX_NETWORK_UPGRADES; ++j) {
                  if (vDeploymentParams[0] == NetworkUpgradeInfo[j].strName) {
                      UpdateNetworkUpgradeParameters(Consensus::UpgradeIndex(j), nActivationHeight);
                      found = true;
                      LogPrintf("Setting network upgrade activation parameters for %s to height=%d\n", vDeploymentParams[0], nActivationHeight);
                      break;
                  }
              }
              if (!found) {
                  return UIError(strprintf("Invalid network upgrade (%s)", vDeploymentParams[0]));
              }
          }
      }
      return true;
  }
  
  static std::string ResolveErrMsg(const char * const optname, const std::string& strBind)
  {
      return strprintf(_("Cannot resolve -%s address: '%s'"), optname, strBind);
  }
  
  void InitLogging()
  {
      //g_logger->m_print_to_file = !IsArgNegated("-debuglogfile");
      g_logger->m_print_to_file = true;
      g_logger->m_file_path = AbsPathForConfigVal(GetArg("-debuglogfile", DEFAULT_DEBUGLOGFILE));
  
      // Add newlines to the logfile to distinguish this execution from the last
      // one; called before console logging is set up, so this is only sent to
      // debug.log.
      LogPrintf("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
  
      g_logger->m_print_to_console = GetBoolArg("-printtoconsole", !GetBoolArg("-daemon", false));
      g_logger->m_log_timestamps = GetBoolArg("-logtimestamps", DEFAULT_LOGTIMESTAMPS);
      g_logger->m_log_time_micros = GetBoolArg("-logtimemicros", DEFAULT_LOGTIMEMICROS);
  
      fLogIPs = GetBoolArg("-logips", DEFAULT_LOGIPS);
  
      std::string version_string = FormatFullVersion();
  #ifdef DEBUG
      version_string += " (debug build)";
  #else
      version_string += " (release build)";
  #endif
      LogPrintf("YEP version %s (%s)\n", version_string, CLIENT_DATE);
  }
  
  /** Initialize pivx.
   *  @pre Parameters should be parsed and config file should be read.
   */
  bool AppInit2()
  {
      // ********************************************************* Step 1: setup
      if (!AppInitBasicSetup())
          return false;
  
      // ********************************************************* Step 2: parameter interactions
      // 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);
      int 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 UIError(_("Not enough file descriptors available."));
      if (nFD - MIN_CORE_FILEDESCRIPTORS < nMaxConnections)
          nMaxConnections = nFD - MIN_CORE_FILEDESCRIPTORS;
  
      // ********************************************************* Step 3: parameter-to-internal-flags
  
      // Special-case: if -debug=0/-nodebug is set, turn off debugging messages
      const std::vector<std::string>& categories = mapMultiArgs["-debug"];
  
      if (!(GetBoolArg("-nodebug", false) ||
              find(categories.begin(), categories.end(), std::string("0")) != categories.end())) {
          for (const auto& cat : categories) {
              if (!g_logger->EnableCategory(cat)) {
                  UIWarning(strprintf(_("Unsupported logging category %s=%s."), "-debug", cat));
              }
          }
      }
  
      // Now remove the logging categories which were explicitly excluded
      if (mapMultiArgs.count("-debugexclude") > 0) {
          const std::vector<std::string>& excludedCategories = mapMultiArgs.at("-debugexclude");
          for (const auto& cat : excludedCategories) {
              if (!g_logger->DisableCategory(cat)) {
                  UIWarning(strprintf(_("Unsupported logging category %s=%s."), "-debugexclude", cat));
              }
          }
      }
  
      // Check for -debugnet
      if (GetBoolArg("-debugnet", false))
          UIWarning(_("Warning: 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 UIError(_("Error: 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 UIError(_("Error: Unsupported argument -tor found, use -onion."));
      // Check level must be 4 for zerocoin checks
      if (mapArgs.count("-checklevel"))
          return UIError(_("Error: Unsupported argument -checklevel found. Checklevel must be level 4."));
      // Exit early if -masternode=1 and -listen=0
      if (GetBoolArg("-masternode", DEFAULT_MASTERNODE) && !GetBoolArg("-listen", DEFAULT_LISTEN))
          return UIError(_("Error: -listen must be true if -masternode is set."));
      // Exit early if -masternode=1 and -port is not the default port
      if (GetBoolArg("-masternode", DEFAULT_MASTERNODE) && GetListenPort() != Params().GetDefaultPort())
          return UIError(strprintf(_("Error: Invalid port %d for running a masternode."), GetListenPort()) + "\n\n" +
                         strprintf(_("Masternodes are required to run on port %d for %s-net"), Params().GetDefaultPort(), Params().NetworkIDString()));
  
      if (GetBoolArg("-benchmark", false))
          UIWarning(_("Warning: Unsupported argument -benchmark ignored, use -debug=bench."));
  
      // Checkmempool and checkblockindex default to true in regtest mode
      int ratio = std::min<int>(std::max<int>(GetArg("-checkmempool", Params().DefaultConsistencyChecks() ? 1 : 0), 0), 1000000);
      if (ratio != 0) {
          mempool.setSanityCheck(1.0 / ratio);
      }
      fCheckBlockIndex = GetBoolArg("-checkblockindex", Params().DefaultConsistencyChecks());
      Checkpoints::fEnabled = GetBoolArg("-checkpoints", DEFAULT_CHECKPOINTS_ENABLED);
  
      // -mempoollimit limits
      int64_t nMempoolSizeLimit = GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000;
      int64_t nMempoolDescendantSizeLimit = GetArg("-limitdescendantsize", DEFAULT_DESCENDANT_SIZE_LIMIT) * 1000;
      if (nMempoolSizeLimit < 0 || nMempoolSizeLimit < nMempoolDescendantSizeLimit * 40)
          return UIError(strprintf(_("Error: -maxmempool must be at least %d MB"), GetArg("-limitdescendantsize", DEFAULT_DESCENDANT_SIZE_LIMIT) / 25));
  
      // -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;
  
      setvbuf(stdout, NULL, _IOLBF, 0); /// ***TODO*** do we still need this after -printtoconsole is gone?
  
      // Staking needs a CWallet instance, so make sure wallet is enabled
  #ifdef ENABLE_WALLET
      bool fDisableWallet = GetBoolArg("-disablewallet", false);
      if (fDisableWallet) {
  #endif
          if (SoftSetBoolArg("-staking", false))
              LogPrintf("AppInit2 : parameter interaction: wallet functionality not enabled -> setting -staking=0\n");
  #ifdef ENABLE_WALLET
      } else {
          // Register wallet RPC commands
          walletRegisterRPCCommands();
      }
  #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 UIError(AmountErrMsg("minrelaytxfee", mapArgs["-minrelaytxfee"]));
      }
  
  #ifdef ENABLE_WALLET
      std::string strWalletFile = GetArg("-wallet", DEFAULT_WALLET_DAT);
      if (!CWallet::ParameterInteraction())
          return false;
  #endif // ENABLE_WALLET
  
      fIsBareMultisigStd = GetBoolArg("-permitbaremultisig", DEFAULT_PERMIT_BAREMULTISIG);
      nMaxDatacarrierBytes = GetArg("-datacarriersize", nMaxDatacarrierBytes);
  
      ServiceFlags nLocalServices = NODE_NETWORK;
      ServiceFlags nRelevantServices = NODE_NETWORK;
  
      if (GetBoolArg("-peerbloomfilters", DEFAULT_PEERBLOOMFILTERS))
          nLocalServices = ServiceFlags(nLocalServices | NODE_BLOOM);
  
      nMaxTipAge = GetArg("-maxtipage", DEFAULT_MAX_TIP_AGE);
  
      if (!InitNUParams())
          return false;
  
      // ********************************************************* Step 4: application initialization: dir lock, daemonize, pidfile, debug log
  
      // Initialize elliptic curve code
      RandomInit();
      ECC_Start();
      globalVerifyHandle.reset(new ECCVerifyHandle());
  
      // Sanity check
      if (!InitSanityCheck())
          return UIError(_("Initialization sanity check failed. YEP Core is shutting down."));
  
      std::string strDataDir = GetDataDir().string();
  
      // Make sure only a single PIVX process is using the data directory.
      fs::path pathLockFile = GetDataDir() / ".lock";
      FILE* file = fsbridge::fopen(pathLockFile, "a"); // empty lock file; created if it doesn't exist.
      if (file) fclose(file);
      static boost::interprocess::file_lock lock(pathLockFile.string().c_str());
  
      // Wait maximum 10 seconds if an old wallet is still running. Avoids lockup during restart
      if (!lock.timed_lock(boost::get_system_time() + boost::posix_time::seconds(10)))
          return UIError(strprintf(_("Cannot obtain a lock on data directory %s. YEP Core is probably already running."), strDataDir));
  
  #ifndef WIN32
      CreatePidFile(GetPidFile(), getpid());
  #endif
      if (g_logger->m_print_to_file) {
          if (GetBoolArg("-shrinkdebugfile", g_logger->DefaultShrinkDebugFile()))
              g_logger->ShrinkDebugFile();
          if (!g_logger->OpenDebugLog())
              return UIError(strprintf("Could not open debug log file %s", g_logger->m_file_path.string()));
      }
  #ifdef ENABLE_WALLET
      LogPrintf("Using BerkeleyDB version %s\n", DbEnv::version(0, 0, 0));
  #endif
      if (!g_logger->m_log_timestamps)
          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;
  
      InitSignatureCache();
  
      LogPrintf("Using %u threads for script verification\n", nScriptCheckThreads);
      if (nScriptCheckThreads) {
          for (int i = 0; i < nScriptCheckThreads - 1; i++)
              threadGroup.create_thread(&ThreadScriptCheck);
      }
  
      if (mapArgs.count("-sporkkey")) // spork priv key
      {
          if (!sporkManager.SetPrivKey(GetArg("-sporkkey", "")))
              return UIError(_("Unable to sign spork message, wrong key?"));
      }
  
      // Start the lightweight task scheduler thread
      CScheduler::Function serviceLoop = boost::bind(&CScheduler::serviceQueue, &scheduler);
      threadGroup.create_thread(boost::bind(&TraceThread<CScheduler::Function>, "scheduler", serviceLoop));
  
      if (Params().IsRegTestNet()) { // only for regtest for now
          // Initialize Sapling circuit parameters
          LoadSaplingParams();
      }
  
      /* 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 (GetBoolArg("-server", false)) {
          uiInterface.InitMessage.connect(SetRPCWarmupStatus);
          if (!AppInitServers())
              return UIError(_("Unable to start HTTP server. See debug log for details."));
      }
  
  // ********************************************************* Step 5: Backup wallet and verify wallet database integrity
  #ifdef ENABLE_WALLET
      if (!fDisableWallet) {
          fs::path backupDir = GetDataDir() / "backups";
          if (!fs::exists(backupDir)) {
              // Always create backup folder to not confuse the operating system's file browser
              fs::create_directories(backupDir);
          }
          nWalletBackups = GetArg("-createwalletbackups", DEFAULT_CREATEWALLETBACKUPS);
          nWalletBackups = std::max(0, std::min(10, nWalletBackups));
          if (nWalletBackups > 0) {
              if (fs::exists(backupDir)) {
                  // Create backup of the wallet
                  std::string dateTimeStr = DateTimeStrFormat(".%Y-%m-%d-%H-%M", GetTime());
                  std::string backupPathStr = backupDir.string();
                  backupPathStr += "/" + strWalletFile;
                  std::string sourcePathStr = GetDataDir().string();
                  sourcePathStr += "/" + strWalletFile;
                  fs::path sourceFile = sourcePathStr;
                  fs::path backupFile = backupPathStr + dateTimeStr;
                  sourceFile.make_preferred();
                  backupFile.make_preferred();
                  if (fs::exists(sourceFile)) {
  #if BOOST_VERSION >= 105800
                      try {
                          fs::copy_file(sourceFile, backupFile);
                          LogPrintf("Creating backup of %s -> %s\n", sourceFile, backupFile);
                      } catch (const fs::filesystem_error& error) {
                          LogPrintf("Failed to create backup %s\n", error.what());
                      }
  #else
                      std::ifstream src(sourceFile.string(), std::ios::binary);
                      std::ofstream dst(backupFile.string(), std::ios::binary);
                      dst << src.rdbuf();
  #endif
                  }
                  // Keep only the last 10 backups, including the new one of course
                  typedef std::multimap<std::time_t, fs::path> folder_set_t;
                  folder_set_t folder_set;
                  fs::directory_iterator end_iter;
                  fs::path backupFolder = backupDir.string();
                  backupFolder.make_preferred();
                  // Build map of backup files for current(!) wallet sorted by last write time
                  fs::path currentFile;
                  for (fs::directory_iterator dir_iter(backupFolder); dir_iter != end_iter; ++dir_iter) {
                      // Only check regular files
                      if (fs::is_regular_file(dir_iter->status())) {
                          currentFile = dir_iter->path().filename();
                          // Only add the backups for the current wallet, e.g. wallet.dat.*
                          if (dir_iter->path().stem().string() == strWalletFile) {
                              folder_set.insert(folder_set_t::value_type(fs::last_write_time(dir_iter->path()), *dir_iter));
                          }
                      }
                  }
                  // Loop backward through backup files and keep the N newest ones (1 <= N <= 10)
                  int counter = 0;
                  BOOST_REVERSE_FOREACH (PAIRTYPE(const std::time_t, fs::path) file, folder_set) {
                      counter++;
                      if (counter > nWalletBackups) {
                          // More than nWalletBackups backups: delete oldest one(s)
                          try {
                              fs::remove(file.second);
                              LogPrintf("Old backup deleted: %s\n", file.second);
                          } catch (const fs::filesystem_error& error) {
                              LogPrintf("Failed to delete backup %s\n", error.what());
                          }
                      }
                  }
              }
          }
  
          if (GetBoolArg("-resync", false)) {
              uiInterface.InitMessage(_("Preparing for resync..."));
              // Delete the local blockchain folders to force a resync from scratch to get a consitent blockchain-state
              fs::path blocksDir = GetDataDir() / "blocks";
              fs::path chainstateDir = GetDataDir() / "chainstate";
              fs::path sporksDir = GetDataDir() / "sporks";
              fs::path zerocoinDir = GetDataDir() / "zerocoin";
  
              LogPrintf("Deleting blockchain folders blocks, chainstate, sporks and zerocoin\n");
              // We delete in 4 individual steps in case one of the folder is missing already
              try {
                  if (fs::exists(blocksDir)){
                      fs::remove_all(blocksDir);
                      LogPrintf("-resync: folder deleted: %s\n", blocksDir.string().c_str());
                  }
  
                  if (fs::exists(chainstateDir)){
                      fs::remove_all(chainstateDir);
                      LogPrintf("-resync: folder deleted: %s\n", chainstateDir.string().c_str());
                  }
  
                  if (fs::exists(sporksDir)){
                      fs::remove_all(sporksDir);
                      LogPrintf("-resync: folder deleted: %s\n", sporksDir.string().c_str());
                  }
  
                  if (fs::exists(zerocoinDir)){
                      fs::remove_all(zerocoinDir);
                      LogPrintf("-resync: folder deleted: %s\n", zerocoinDir.string().c_str());
                  }
              } catch (const fs::filesystem_error& error) {
                  LogPrintf("Failed to delete blockchain folders %s\n", error.what());
              }
          }
  
          if (!CWallet::Verify())
              return false;
  
      }  // (!fDisableWallet)
  #endif // ENABLE_WALLET
  
      // ********************************************************* Step 6: network initialization
  
      assert(!g_connman);
      g_connman = MakeUnique<CConnman>(GetRand(std::numeric_limits<uint64_t>::max()), GetRand(std::numeric_limits<uint64_t>::max()));
      CConnman& connman = *g_connman;
  
      RegisterNodeSignals(GetNodeSignals());
  
      // sanitize comments per BIP-0014, format user agent and check total size
      std::vector<std::string> uacomments;
      for (const std::string& cmt : mapMultiArgs["-uacomment"]) {
          if (cmt != SanitizeString(cmt, SAFE_CHARS_UA_COMMENT))
              return UIError(strprintf(_("User Agent comment (%s) contains unsafe characters."), cmt));
          uacomments.push_back(cmt);
      }
  
      // format user agent, check total size
      strSubVersion = FormatSubVersion(CLIENT_NAME, CLIENT_VERSION, uacomments);
      if (strSubVersion.size() > MAX_SUBVERSION_LENGTH) {
          return UIError(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;
          for (std::string snet : mapMultiArgs["-onlynet"]) {
              enum Network net = ParseNetwork(snet);
              if (net == NET_UNROUTABLE)
                  return UIError(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")) {
          for (const std::string& net : mapMultiArgs["-whitelist"]) {
              CSubNet subnet;
              LookupSubNet(net.c_str(), subnet);
              if (!subnet.IsValid())
                  return UIError(strprintf(_("Invalid netmask specified in -whitelist: '%s'"), net));
              connman.AddWhitelistedRange(subnet);
          }
      }
  
      // Check for host lookup allowed before parsing any network related parameters
      fNameLookup = GetBoolArg("-dns", DEFAULT_NAME_LOOKUP);
  
      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") {
          CService proxyAddr;
          if (!Lookup(proxyArg.c_str(), proxyAddr, 9050, fNameLookup)) {
              return UIError(strprintf(_("Lookup(): Invalid -proxy address or hostname: '%s'"), proxyArg));
          }
  
          proxyType addrProxy = proxyType(proxyAddr, proxyRandomize);
          if (!addrProxy.IsValid())
              return UIError(strprintf(_("isValid(): Invalid -proxy address or hostname: '%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 {
              CService onionProxy;
              if (!Lookup(onionArg.c_str(), onionProxy, 9050, fNameLookup)) {
                  return UIError(strprintf(_("Invalid -onion address or hostname: '%s'"), onionArg));
              }
              proxyType addrOnion = proxyType(onionProxy, proxyRandomize);
              if (!addrOnion.IsValid())
                  return UIError(strprintf(_("Invalid -onion address or hostname: '%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);
  
      bool fBound = false;
      if (fListen) {
          if (mapArgs.count("-bind") || mapArgs.count("-whitebind")) {
              for (std::string strBind : mapMultiArgs["-bind"]) {
                  CService addrBind;
                  if (!Lookup(strBind.c_str(), addrBind, GetListenPort(), false))
                      return UIError(ResolveErrMsg("bind", strBind));
                  fBound |= Bind(connman, addrBind, (BF_EXPLICIT | BF_REPORT_ERROR));
              }
              for (std::string strBind : mapMultiArgs["-whitebind"]) {
                  CService addrBind;
                  if (!Lookup(strBind.c_str(), addrBind, 0, false))
                      return UIError(ResolveErrMsg("whitebind", strBind));
                  if (addrBind.GetPort() == 0)
                      return UIError(strprintf(_("Need to specify a port with -whitebind: '%s'"), strBind));
                  fBound |= Bind(connman, addrBind, (BF_EXPLICIT | BF_REPORT_ERROR | BF_WHITELIST));
              }
          } else {
              struct in_addr inaddr_any;
              inaddr_any.s_addr = INADDR_ANY;
              fBound |= Bind(connman, CService((in6_addr)IN6ADDR_ANY_INIT, GetListenPort()), BF_NONE);
              fBound |= Bind(connman, CService(inaddr_any, GetListenPort()), !fBound ? BF_REPORT_ERROR : BF_NONE);
          }
          if (!fBound)
              return UIError(_("Failed to listen on any port. Use -listen=0 if you want this."));
      }
  
      if (mapArgs.count("-externalip")) {
          for (std::string strAddr : mapMultiArgs["-externalip"]) {
              CService addrLocal;
              if (Lookup(strAddr.c_str(), addrLocal, GetListenPort(), fNameLookup) && addrLocal.IsValid())
                  AddLocal(addrLocal,LOCAL_MANUAL);
              else
                  return UIError(ResolveErrMsg("externalip", strAddr));
          }
      }
  
      for (const std::string& strDest : mapMultiArgs["-seednode"])
          connman.AddOneShot(strDest);
  
  #if ENABLE_ZMQ
      pzmqNotificationInterface = CZMQNotificationInterface::CreateWithArguments(mapArgs);
  
      if (pzmqNotificationInterface) {
          RegisterValidationInterface(pzmqNotificationInterface);
      }
  #endif
  
      // ********************************************************* Step 7: load block chain
  
      fReindex = GetBoolArg("-reindex", false);
  
      // Create blocks directory if it doesn't already exist
      fs::create_directories(GetDataDir() / "blocks");
  
      // 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 greater 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 && !ShutdownRequested()) {
          bool fReset = fReindex;
          std::string strLoadError;
  
          do {
              const int64_t load_block_index_start_time = GetTimeMillis();
  
              try {
                  UnloadBlockIndex();
                  delete pcoinsTip;
                  delete pcoinsdbview;
                  delete pcoinscatcher;
                  delete pblocktree;
                  delete zerocoinDB;
                  delete pSporkDB;
  
                  //PIVX specific: zerocoin and spork DB's
                  zerocoinDB = new CZerocoinDB(0, false, fReindex);
                  pSporkDB = new CSporkDB(0, false, false);
  
                  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);
                  } else {
                      uiInterface.InitMessage(_("Upgrading coins database..."));
                      // If necessary, upgrade from older database format.
                      if (!pcoinsdbview->Upgrade()) {
                          strLoadError = _("Error upgrading chainstate database");
                          break;
                      }
                  }
  
                  // End loop if shutdown was requested
                  if (ShutdownRequested()) break;
  
                  // PIVX: load previous sessions sporks if we have them.
                  uiInterface.InitMessage(_("Loading sporks..."));
                  sporkManager.LoadSporksFromDB();
  
                  uiInterface.InitMessage(_("Loading block index..."));
                  std::string strBlockIndexError = "";
                  if (!LoadBlockIndex(strBlockIndexError)) {
                      if (ShutdownRequested()) break;
                      strLoadError = _("Error loading block database");
                      strLoadError = strprintf("%s : %s", strLoadError, strBlockIndexError);
                      break;
                  }
  
                  const Consensus::Params& consensus = Params().GetConsensus();
  
                  // 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(consensus.hashGenesisBlock) == 0)
                      return UIError(_("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()) {
                      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;
                  }
  
                  // Populate list of invalid/fraudulent outpoints that are banned from the chain
                  invalid_out::LoadOutpoints();
                  invalid_out::LoadSerials();
  
                  bool fReindexZerocoin = GetBoolArg("-reindexzerocoin", false);
                  bool fReindexMoneySupply = GetBoolArg("-reindexmoneysupply", false);
  
                  int chainHeight;
                  {
                      LOCK(cs_main);
                      chainHeight = chainActive.Height();
  
                      // initialize PIV and zPIV supply to 0
                      mapZerocoinSupply.clear();
                      for (auto& denom : libzerocoin::zerocoinDenomList) mapZerocoinSupply.insert(std::make_pair(denom, 0));
                      nMoneySupply = 0;
  
                      // Load PIV and zPIV supply from DB
                      if (chainHeight >= 0) {
                          const uint256& tipHash = chainActive[chainHeight]->GetBlockHash();
                          CLegacyBlockIndex bi;
  
                          // Load zPIV supply map
                          if (!fReindexZerocoin && consensus.NetworkUpgradeActive(chainHeight, Consensus::UPGRADE_ZC) &&
                                  !zerocoinDB->ReadZCSupply(mapZerocoinSupply)) {
                              // try first reading legacy block index from DB
                              if (pblocktree->ReadLegacyBlockIndex(tipHash, bi) && !bi.mapZerocoinSupply.empty()) {
                                  mapZerocoinSupply = bi.mapZerocoinSupply;
                              } else {
                                  // reindex from disk
                                  fReindexZerocoin = true;
                              }
                          }
  
                          // Load PIV supply amount
                          if (!fReindexMoneySupply && !pblocktree->ReadMoneySupply(nMoneySupply)) {
                              // try first reading legacy block index from DB
                              if (pblocktree->ReadLegacyBlockIndex(tipHash, bi)) {
                                  nMoneySupply = bi.nMoneySupply;
                              } else {
                                  // reindex from disk
                                  fReindexMoneySupply = true;
                              }
                          }
                      }
                  }
  
                  // Drop all information from the zerocoinDB and repopulate
                  if (fReindexZerocoin && consensus.NetworkUpgradeActive(chainHeight, Consensus::UPGRADE_ZC)) {
                      LOCK(cs_main);
                      uiInterface.InitMessage(_("Reindexing zerocoin database..."));
                      std::string strError = ReindexZerocoinDB();
                      if (strError != "") {
                          strLoadError = strError;
                          break;
                      }
                  }
  
                  // Recalculate money supply
                  if (fReindexMoneySupply) {
                      LOCK(cs_main);
                      // Skip zpiv if already reindexed
                      RecalculateYEPSupply(1, fReindexZerocoin);
                  }
  
                  if (!fReindex) {
                      uiInterface.InitMessage(_("Verifying blocks..."));
  
                      // Flag sent to validation code to let it know it can skip certain checks
                      fVerifyingBlocks = true;
  
                      {
                          LOCK(cs_main);
                          CBlockIndex *tip = chainActive[chainHeight];
                          RPCNotifyBlockChange(true, 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;
                          }
                      }
  
                      // Zerocoin must check at level 4
                      if (!CVerifyDB().VerifyDB(pcoinsdbview, 4, GetArg("-checkblocks", DEFAULT_CHECKBLOCKS))) {
                          strLoadError = _("Corrupted block database detected");
                          fVerifyingBlocks = false;
                          break;
                      }
                  }
              } catch (const std::exception& e) {
                  LogPrintf("%s\n", e.what());
                  strLoadError = _("Error opening block database");
                  fVerifyingBlocks = false;
                  break;
              }
  
              fVerifyingBlocks = false;
              fLoaded = true;
              LogPrintf(" block index %15dms\n", GetTimeMillis() - load_block_index_start_time);
          } while (false);
  
          if (!fLoaded && !ShutdownRequested()) {
              // 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 UIError(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 (ShutdownRequested()) {
          LogPrintf("Shutdown requested. Exiting.\n");
          return false;
      }
  
      fs::path est_path = GetDataDir() / FEE_ESTIMATES_FILENAME;
      CAutoFile est_filein(fsbridge::fopen(est_path, "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 (!CWallet::InitLoadWallet())
          return false;
  #else
      LogPrintf("No wallet compiled in!\n");
  #endif
      // ********************************************************* Step 9: import blocks
  
      if (!CheckDiskSpace())
          return false;
  
      // Either install a handler to notify us when genesis activates, or set fHaveGenesis directly.
      // No locking, as this happens before any background thread is started.
      if (chainActive.Tip() == nullptr) {
          uiInterface.NotifyBlockTip.connect(BlockNotifyGenesisWait);
      } else {
          fHaveGenesis = true;
      }
  
      if (mapArgs.count("-blocknotify"))
          uiInterface.NotifyBlockTip.connect(BlockNotifyCallback);
  
      if (mapArgs.count("-blocksizenotify"))
          uiInterface.NotifyBlockSize.connect(BlockSizeNotifyCallback);
  
      // scan for better chains in the block chain database, that are not yet connected in the active best chain
      CValidationState state;
      if (!ActivateBestChain(state))
          strErrors << "Failed to connect best block";
      // update g_best_block if needed
      {
          LOCK(g_best_block_mutex);
          if (g_best_block.IsNull() && chainActive.Tip()) {
              g_best_block = chainActive.Tip()->GetBlockHash();
              g_best_block_cv.notify_all();
          }
      }
  
      std::vector<fs::path> vImportFiles;
      if (mapArgs.count("-loadblock")) {
          for (std::string strFile : mapMultiArgs["-loadblock"])
              vImportFiles.push_back(strFile);
      }
      threadGroup.create_thread(boost::bind(&ThreadImport, vImportFiles));
  
      // Wait for genesis block to be processed
      LogPrintf("Waiting for genesis block to be imported...\n");
      {
          std::unique_lock<std::mutex> lockG(cs_GenesisWait);
          while (!fHaveGenesis) {
              condvar_GenesisWait.wait(lockG);
          }
          uiInterface.NotifyBlockTip.disconnect(BlockNotifyGenesisWait);
      }
  
      // ********************************************************* Step 10: setup layer 2 data
  
      uiInterface.InitMessage(_("Loading masternode cache..."));
  
      CMasternodeDB mndb;
      CMasternodeDB::ReadResult readResult = mndb.Read(mnodeman);
      if (readResult == CMasternodeDB::FileError)
          LogPrintf("Missing masternode cache file - mncache.dat, will try to recreate\n");
      else if (readResult != CMasternodeDB::Ok) {
          LogPrintf("Error reading mncache.dat: ");
          if (readResult == CMasternodeDB::IncorrectFormat)
              LogPrintf("magic is ok but data has invalid format, will try to recreate\n");
          else
              LogPrintf("file format is unknown or invalid, please fix it manually\n");
      }
  
      uiInterface.InitMessage(_("Loading budget cache..."));
  
      CBudgetDB budgetdb;
      int nChainHeight = WITH_LOCK(cs_main, return chainActive.Height(); );
      const bool fDryRun = (nChainHeight <= 0);
      CBudgetDB::ReadResult readResult2 = budgetdb.Read(budget, fDryRun);
      if (nChainHeight > 0)
          budget.SetBestHeight(nChainHeight);
  
      if (readResult2 == CBudgetDB::FileError)
          LogPrintf("Missing budget cache - budget.dat, will try to recreate\n");
      else if (readResult2 != CBudgetDB::Ok) {
          LogPrintf("Error reading budget.dat: ");
          if (readResult2 == CBudgetDB::IncorrectFormat)
              LogPrintf("magic is ok but data has invalid format, will try to recreate\n");
          else
              LogPrintf("file format is unknown or invalid, please fix it manually\n");
      }
  
      //flag our cached items so we send them to our peers
      budget.ResetSync();
      budget.ClearSeen();
  
  
      uiInterface.InitMessage(_("Loading masternode payment cache..."));
  
      CMasternodePaymentDB mnpayments;
      CMasternodePaymentDB::ReadResult readResult3 = mnpayments.Read(masternodePayments);
  
      if (readResult3 == CMasternodePaymentDB::FileError)
          LogPrintf("Missing masternode payment cache - mnpayments.dat, will try to recreate\n");
      else if (readResult3 != CMasternodePaymentDB::Ok) {
          LogPrintf("Error reading mnpayments.dat: ");
          if (readResult3 == CMasternodePaymentDB::IncorrectFormat)
              LogPrintf("magic is ok but data has invalid format, will try to recreate\n");
          else
              LogPrintf("file format is unknown or invalid, please fix it manually\n");
      }
  
      fMasterNode = GetBoolArg("-masternode", DEFAULT_MASTERNODE);
  
      if ((fMasterNode || masternodeConfig.getCount() > -1) && fTxIndex == false) {
          return UIError("Enabling Masternode support requires turning on transaction indexing."
                           "Please add txindex=1 to your configuration and start with -reindex");
      }
  
      if (fMasterNode) {
          LogPrintf("IS MASTER NODE\n");
          strMasterNodeAddr = GetArg("-masternodeaddr", "");
  
          LogPrintf(" addr %s\n", strMasterNodeAddr.c_str());
  
          if (!strMasterNodeAddr.empty()) {
              int nPort;
              int nDefaultPort = Params().GetDefaultPort();
              std::string strHost;
              SplitHostPort(strMasterNodeAddr, nPort, strHost);
  
              // Allow for the port number to be omitted here and just double check
              // that if a port is supplied, it matches the required default port.
              if (nPort == 0) nPort = nDefaultPort;
              if (nPort != nDefaultPort) {
                  return UIError(strprintf(_("Invalid -masternodeaddr port %d, only %d is supported on %s-net."),
                      nPort, nDefaultPort, Params().NetworkIDString()));
              }
              CService addrTest(LookupNumeric(strHost.c_str(), nPort));
              if (!addrTest.IsValid()) {
                  return UIError(strprintf(_("Invalid -masternodeaddr address: %s"), strMasterNodeAddr));
              }
          }
  
          strMasterNodePrivKey = GetArg("-masternodeprivkey", "");
          if (!strMasterNodePrivKey.empty()) {
              std::string errorMessage;
  
              CKey key;
              CPubKey pubkey;
  
              if (!CMessageSigner::GetKeysFromSecret(strMasterNodePrivKey, key, pubkey)) {
                  return UIError(_("Invalid masternodeprivkey. Please see documenation."));
              }
  
              activeMasternode.pubKeyMasternode = pubkey;
  
          } else {
              return UIError(_("You must specify a masternodeprivkey in the configuration. Please see documentation for help."));
          }
      }
  
      //get the mode of budget voting for this masternode
      strBudgetMode = GetArg("-budgetvotemode", "auto");
  
      if (GetBoolArg("-mnconflock", DEFAULT_MNCONFLOCK) && pwalletMain) {
          LOCK(pwalletMain->cs_wallet);
          LogPrintf("Locking Masternodes:\n");
          uint256 mnTxHash;
          for (CMasternodeConfig::CMasternodeEntry mne : masternodeConfig.getEntries()) {
              LogPrintf("  %s %s\n", mne.getTxHash(), mne.getOutputIndex());
              mnTxHash.SetHex(mne.getTxHash());
              COutPoint outpoint = COutPoint(mnTxHash, (unsigned int) std::stoul(mne.getOutputIndex().c_str()));
              pwalletMain->LockCoin(outpoint);
          }
      }
  
      fEnableSwiftTX = GetBoolArg("-enableswifttx", fEnableSwiftTX);
      nSwiftTXDepth = GetArg("-swifttxdepth", nSwiftTXDepth);
      nSwiftTXDepth = std::min(std::max(nSwiftTXDepth, 0), 60);
  
      //lite mode disables all Masternode related functionality
      fLiteMode = GetBoolArg("-litemode", false);
      if (fMasterNode && fLiteMode) {
          return UIError("You can not start a masternode in litemode");
      }
  
      LogPrintf("fLiteMode %d\n", fLiteMode);
      LogPrintf("nSwiftTXDepth %d\n", nSwiftTXDepth);
      LogPrintf("Budget Mode %s\n", strBudgetMode.c_str());
  
      threadGroup.create_thread(boost::bind(&ThreadCheckMasternodes));
  
      if (ShutdownRequested()) {
          LogPrintf("Shutdown requested. Exiting.\n");
          return false;
      }
  
      // ********************************************************* Step 11: start node
  
      if (!strErrors.str().empty())
          return UIError(strErrors.str());
  
      //// debug print
      LogPrintf("mapBlockIndex.size() = %u\n", mapBlockIndex.size());
      LogPrintf("chainActive.Height() = %d\n", chainActive.Height());
  #ifdef ENABLE_WALLET
      {
          if (pwalletMain) {
              LOCK(pwalletMain->cs_wallet);
              LogPrintf("setKeyPool.size() = %u\n", pwalletMain ? pwalletMain->GetKeyPoolSize() : 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);
  
      Discover(threadGroup);
  
      // Map ports with UPnP
      MapPort(GetBoolArg("-upnp", DEFAULT_UPNP));
  
      std::string strNodeError;
      CConnman::Options connOptions;
      connOptions.nLocalServices = nLocalServices;
      connOptions.nRelevantServices = nRelevantServices;
      connOptions.nMaxConnections = nMaxConnections;
      connOptions.nMaxOutbound = std::min(MAX_OUTBOUND_CONNECTIONS, connOptions.nMaxConnections);
      connOptions.nMaxFeeler = 1;
      connOptions.nBestHeight = chainActive.Height();
      connOptions.uiInterface = &uiInterface;
      connOptions.nSendBufferMaxSize = 1000*GetArg("-maxsendbuffer", DEFAULT_MAXSENDBUFFER);
      connOptions.nReceiveFloodSize = 1000*GetArg("-maxreceivebuffer", DEFAULT_MAXRECEIVEBUFFER);
  
      if (!connman.Start(scheduler, strNodeError, connOptions))
          return UIError(strNodeError);
  
  #ifdef ENABLE_WALLET
      // Generate coins in the background
      if (pwalletMain)
          GenerateBitcoins(GetBoolArg("-gen", DEFAULT_GENERATE), pwalletMain, GetArg("-genproclimit", DEFAULT_GENERATE_PROCLIMIT));
  #endif
  
      // ********************************************************* Step 12: finished
  
      SetRPCWarmupFinished();
      uiInterface.InitMessage(_("Done loading"));
  
  #ifdef ENABLE_WALLET
      if (pwalletMain) {
          pwalletMain->postInitProcess(threadGroup);
  
          // StakeMiner thread disabled by default on regtest
          if (GetBoolArg("-staking", !Params().IsRegTestNet() && DEFAULT_STAKING)) {
              threadGroup.create_thread(boost::bind(&ThreadStakeMinter));
          }
      }
  #endif
  
  
      return !fRequestShutdown;
  }
  