text: // Copyright (c) 2009-2010 Satoshi Nakamoto
  // Copyright (c) 2009-2018 The Bitcoin Core developers
  // Copyright (c) 2018-2020 The Blocknet developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #if defined(HAVE_CONFIG_H)
  #include <config/bitcoin-config.h>
  #endif
  
  #include <init.h>
  
  #include <addrman.h>
  #include <amount.h>
  #include <banman.h>
  #include <chain.h>
  #include <chainparams.h>
  #include <checkpoints.h>
  #include <coinvalidator.h>
  #include <compat/sanity.h>
  #include <consensus/validation.h>
  #include <fs.h>
  #include <governance/governance.h>
  #include <httpserver.h>
  #include <httprpc.h>
  #include <interfaces/chain.h>
  #include <index/txindex.h>
  #include <kernel.h>
  #include <key.h>
  #include <validation.h>
  #include <miner.h>
  #include <netbase.h>
  #include <net.h>
  #include <net_processing.h>
  #include <policy/feerate.h>
  #include <policy/fees.h>
  #include <policy/policy.h>
  #include <rpc/server.h>
  #include <rpc/register.h>
  #include <rpc/blockchain.h>
  #include <rpc/util.h>
  #include <script/standard.h>
  #include <script/sigcache.h>
  #include <scheduler.h>
  #include <servicenode/servicenodemgr.h>
  #include <shutdown.h>
  #include <timedata.h>
  #include <txdb.h>
  #include <txmempool.h>
  #include <torcontrol.h>
  #include <ui_interface.h>
  #include <util/system.h>
  #include <util/moneystr.h>
  #include <validationinterface.h>
  #include <warnings.h>
  #include <walletinitinterface.h>
  #include <stdint.h>
  #include <stdio.h>
  
  #include <xbridge/xbridgeapp.h>
  #include <xrouter/xrouterapp.h>
  #ifdef ENABLE_WALLET
  #include <stakemgr.h>
  #endif
  
  #ifndef WIN32
  #include <attributes.h>
  #include <cerrno>
  #include <signal.h>
  #include <sys/stat.h>
  #endif
  
  #include <boost/algorithm/string/classification.hpp>
  #include <boost/algorithm/string/replace.hpp>
  #include <boost/algorithm/string/split.hpp>
  #include <boost/thread.hpp>
  #include <openssl/crypto.h>
  
  #if ENABLE_ZMQ
  #include <zmq/zmqabstractnotifier.h>
  #include <zmq/zmqnotificationinterface.h>
  #include <zmq/zmqrpc.h>
  #endif
  
  bool fFeeEstimatesInitialized = false;
  static const bool DEFAULT_PROXYRANDOMIZE = true;
  static const bool DEFAULT_REST_ENABLE = false;
  static const bool DEFAULT_STOPAFTERBLOCKIMPORT = false;
  
  // Dump addresses to banlist.dat every 15 minutes (900s)
  static constexpr int DUMP_BANS_INTERVAL = 60 * 15;
  
  std::unique_ptr<CConnman> g_connman;
  std::unique_ptr<PeerLogicValidation> peerLogic;
  std::unique_ptr<BanMan> g_banman;
  
  #ifdef WIN32
  // Win32 LevelDB doesn't use filedescriptors, and the ones used for
  // accessing block files don't count towards the fd_set size limit
  // anyway.
  #define MIN_CORE_FILEDESCRIPTORS 0
  #else
  #define MIN_CORE_FILEDESCRIPTORS 150
  #endif
  
  static const char* FEE_ESTIMATES_FILENAME="fee_estimates.dat";
  
  /**
   * The PID file facilities.
   */
  static const char* BITCOIN_PID_FILENAME = "scalarisd.pid";
  
  static fs::path GetPidFile()
  {
      return AbsPathForConfigVal(fs::path(gArgs.GetArg("-pid", BITCOIN_PID_FILENAME)));
  }
  
  NODISCARD static bool CreatePidFile()
  {
      FILE* file = fsbridge::fopen(GetPidFile(), "w");
      if (file) {
  #ifdef WIN32
          fprintf(file, "%d\n", GetCurrentProcessId());
  #else
          fprintf(file, "%d\n", getpid());
  #endif
          fclose(file);
          return true;
      } else {
          return InitError(strprintf(_("Unable to create the PID file '%s': %s"), GetPidFile().string(), std::strerror(errno)));
      }
  }
  
  //////////////////////////////////////////////////////////////////////////////
  //
  // 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 ShutdownRequested(), which makes main thread's
  // WaitForShutdown() interrupts the thread group.
  // And then, WaitForShutdown() makes all other on-going threads
  // in the thread group join the main 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
  // ShutdownRequested() getting set, and then does the normal Qt
  // shutdown thing.
  //
  
  /**
   * This is a minimally invasive approach to shutdown on LevelDB read errors from the
   * chainstate, while keeping user interface out of the common library, which is shared
   * between bitcoind, and bitcoin-qt and non-server tools.
  */
  class CCoinsViewErrorCatcher final : public CCoinsViewBacked
  {
  public:
      explicit 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 interpretation. Just exit immediately, as we can't
              // continue anyway, and all writes should be atomic.
              abort();
          }
      }
      // Writes do not need similar protection, as failure to write is handled by the caller.
  };
  
  static std::unique_ptr<CCoinsViewErrorCatcher> pcoinscatcher;
  static std::unique_ptr<ECCVerifyHandle> globalVerifyHandle;
  
  static boost::thread_group threadGroup;
  static CScheduler scheduler;
  
  void Interrupt()
  {
      InterruptHTTPServer();
      InterruptHTTPRPC();
      InterruptRPC();
      InterruptREST();
      InterruptTorControl();
      InterruptMapPort();
      if (g_connman)
          g_connman->Interrupt();
      if (g_txindex) {
          g_txindex->Interrupt();
      }
  }
  
  void Shutdown(InitInterfaces& interfaces)
  {
      LogPrintf("%s: In progress...\n", __func__);
      static CCriticalSection cs_Shutdown;
      TRY_LOCK(cs_Shutdown, lockShutdown);
      if (!lockShutdown)
          return;
  
      /// Note: Shutdown() must be able to handle cases in which 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.
      RenameThread("scalaris-shutoff");
      mempool.AddTransactionsUpdated(1);
  
      // Shutdown xbridge
      xbridge::App::instance().cancelMyXBridgeTransactions();
      xbridge::App::instance().disconnectWallets();
      xbridge::App::instance().stop();
  
      // Shutdown xrouter
      xrouter::App::instance().stop();
  
      StopHTTPRPC();
      StopREST();
      StopRPC();
      StopHTTPServer();
      for (const auto& client : interfaces.chain_clients) {
          client->flush();
      }
      StopMapPort();
  
      // Because these depend on each-other, we make sure that neither can be
      // using the other before destroying them.
      if (peerLogic) UnregisterValidationInterface(peerLogic.get());
      if (g_connman) g_connman->Stop();
      if (g_txindex) g_txindex->Stop();
  
      StopTorControl();
  
      // After everything has been shut down, but before things get flushed, stop the
      // CScheduler/checkqueue threadGroup
      threadGroup.interrupt_all();
      threadGroup.join_all();
  
      // After the threads that potentially access these pointers have been stopped,
      // destruct and reset all to nullptr.
      peerLogic.reset();
      g_connman.reset();
      g_banman.reset();
      g_txindex.reset();
  
      if (g_is_mempool_loaded && gArgs.GetArg("-persistmempool", DEFAULT_PERSIST_MEMPOOL)) {
          DumpMempool();
      }
  
      if (fFeeEstimatesInitialized)
      {
          ::feeEstimator.FlushUnconfirmed();
          fs::path est_path = GetDataDir() / FEE_ESTIMATES_FILENAME;
          CAutoFile est_fileout(fsbridge::fopen(est_path, "wb"), SER_DISK, CLIENT_VERSION);
          if (!est_fileout.IsNull())
              ::feeEstimator.Write(est_fileout);
          else
              LogPrintf("%s: Failed to write fee estimates to %s\n", __func__, est_path.string());
          fFeeEstimatesInitialized = false;
      }
  
      // FlushStateToDisk generates a ChainStateFlushed callback, which we should avoid missing
      if (pcoinsTip != nullptr) {
          FlushStateToDisk();
      }
  
      // After there are no more peers/RPC left to give us new data which may generate
      // CValidationInterface callbacks, flush them...
      GetMainSignals().FlushBackgroundCallbacks();
  
      // Any future callbacks will be dropped. This should absolutely be safe - if
      // missing a callback results in an unrecoverable situation, unclean shutdown
      // would too. The only reason to do the above flushes is to let the wallet catch
      // up with our current chain to avoid any strange pruning edge cases and make
      // next startup faster by avoiding rescan.
  
      {
          LOCK(cs_main);
          if (pcoinsTip != nullptr) {
              FlushStateToDisk();
          }
          pcoinsTip.reset();
          pcoinscatcher.reset();
          pcoinsdbview.reset();
          pblocktree.reset();
      }
      for (const auto& client : interfaces.chain_clients) {
          client->stop();
      }
  
  #if ENABLE_ZMQ
      if (g_zmq_notification_interface) {
          UnregisterValidationInterface(g_zmq_notification_interface);
          delete g_zmq_notification_interface;
          g_zmq_notification_interface = nullptr;
      }
  #endif
  
      try {
          if (!fs::remove(GetPidFile())) {
              LogPrintf("%s: Unable to remove PID file: File does not exist\n", __func__);
          }
      } catch (const fs::filesystem_error& e) {
          LogPrintf("%s: Unable to remove PID file: %s\n", __func__, fsbridge::get_filesystem_error_message(e));
      }
      interfaces.chain_clients.clear();
      UnregisterAllValidationInterfaces();
      GetMainSignals().UnregisterBackgroundSignalScheduler();
      GetMainSignals().UnregisterWithMempoolSignals(mempool);
      globalVerifyHandle.reset();
      ECC_Stop();
      LogPrintf("%s: done\n", __func__);
  }
  
  /**
   * Signal handlers are very limited in what they are allowed to do.
   * The execution context the handler is invoked in is not guaranteed,
   * so we restrict handler operations to just touching variables:
   */
  #ifndef WIN32
  static void HandleSIGTERM(int)
  {
      StartShutdown();
  }
  
  static void HandleSIGHUP(int)
  {
      LogInstance().m_reopen_file = true;
  }
  #else
  static BOOL WINAPI consoleCtrlHandler(DWORD dwCtrlType)
  {
      StartShutdown();
      Sleep(INFINITE);
      return true;
  }
  #endif
  
  #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
  
  static void OnRPCStarted()
  {
      uiInterface.NotifyBlockTip_connect(&RPCNotifyBlockChange);
  }
  
  static void OnRPCStopped()
  {
      uiInterface.NotifyBlockTip_disconnect(&RPCNotifyBlockChange);
      RPCNotifyBlockChange(false, nullptr);
      g_best_block_cv.notify_all();
      LogPrint(BCLog::RPC, "RPC stopped.\n");
  }
  
  void SetupServerArgs()
  {
      SetupHelpOptions(gArgs);
      gArgs.AddArg("-help-debug", "Print help message with debugging options and exit", false, OptionsCategory::DEBUG_TEST); // server-only for now
  
      const auto defaultBaseParams = CreateBaseChainParams(CBaseChainParams::MAIN);
      const auto testnetBaseParams = CreateBaseChainParams(CBaseChainParams::TESTNET);
      const auto regtestBaseParams = CreateBaseChainParams(CBaseChainParams::REGTEST);
      const auto defaultChainParams = CreateChainParams(CBaseChainParams::MAIN);
      const auto testnetChainParams = CreateChainParams(CBaseChainParams::TESTNET);
      const auto regtestChainParams = CreateChainParams(CBaseChainParams::REGTEST);
  
      // Hidden Options
      std::vector<std::string> hidden_args = {
          "-dbcrashratio", "-forcecompactdb",
          // GUI args. These will be overwritten by SetupUIArgs for the GUI
          "-allowselfsignedrootcertificates", "-choosedatadir", "-lang=<lang>", "-min", "-resetguisettings", "-rootcertificates=<file>", "-splash", "-uiplatform"};
  
      gArgs.AddArg("-version", "Print version and exit", false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-alertnotify=<cmd>", "Execute command when a relevant alert is received or we see a really long fork (%s in cmd is replaced by message)", false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-assumevalid=<hex>", strprintf("If this block is in the chain assume that it and its ancestors are valid and potentially skip their script verification (0 to verify all, default: %s, testnet: %s)", defaultChainParams->GetConsensus().defaultAssumeValid.GetHex(), testnetChainParams->GetConsensus().defaultAssumeValid.GetHex()), false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-blocksdir=<dir>", "Specify blocks directory (default: <datadir>/blocks)", false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-blocknotify=<cmd>", "Execute command when the best block changes (%s in cmd is replaced by block hash)", false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-blockreconstructionextratxn=<n>", strprintf("Extra transactions to keep in memory for compact block reconstructions (default: %u)", DEFAULT_BLOCK_RECONSTRUCTION_EXTRA_TXN), false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-blocksonly", strprintf("Whether to operate in a blocks only mode (default: %u)", DEFAULT_BLOCKSONLY), true, OptionsCategory::OPTIONS);
      gArgs.AddArg("-conf=<file>", strprintf("Specify configuration file. Relative paths will be prefixed by datadir location. (default: %s)", BITCOIN_CONF_FILENAME), false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-datadir=<dir>", "Specify data directory", false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-dbbatchsize", strprintf("Maximum database write batch size in bytes (default: %u)", nDefaultDbBatchSize), true, OptionsCategory::OPTIONS);
      gArgs.AddArg("-dbcache=<n>", strprintf("Maximum database cache size <n> MiB (%d to %d, default: %d). In addition, unused mempool memory is shared for this cache (see -maxmempool).", nMinDbCache, nMaxDbCache, nDefaultDbCache), false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-debuglogfile=<file>", strprintf("Specify location of debug log file. Relative paths will be prefixed by a net-specific datadir location. (-nodebuglogfile to disable; default: %s)", DEFAULT_DEBUGLOGFILE), false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-feefilter", strprintf("Tell other nodes to filter invs to us by our mempool min fee (default: %u)", DEFAULT_FEEFILTER), true, OptionsCategory::OPTIONS);
      gArgs.AddArg("-includeconf=<file>", "Specify additional configuration file, relative to the -datadir path (only useable from configuration file, not command line)", false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-loadblock=<file>", "Imports blocks from external blk000??.dat file on startup", false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-maxmempool=<n>", strprintf("Keep the transaction memory pool below <n> megabytes (default: %u)", DEFAULT_MAX_MEMPOOL_SIZE), false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-maxorphantx=<n>", strprintf("Keep at most <n> unconnectable transactions in memory (default: %u)", DEFAULT_MAX_ORPHAN_TRANSACTIONS), false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-mempoolexpiry=<n>", strprintf("Do not keep transactions in the mempool longer than <n> hours (default: %u)", DEFAULT_MEMPOOL_EXPIRY), false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-minimumchainwork=<hex>", strprintf("Minimum work assumed to exist on a valid chain in hex (default: %s, testnet: %s)", defaultChainParams->GetConsensus().nMinimumChainWork.GetHex(), testnetChainParams->GetConsensus().nMinimumChainWork.GetHex()), true, OptionsCategory::OPTIONS);
      gArgs.AddArg("-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), false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-persistmempool", strprintf("Whether to save the mempool on shutdown and load on restart (default: %u)", DEFAULT_PERSIST_MEMPOOL), false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-pid=<file>", strprintf("Specify pid file. Relative paths will be prefixed by a net-specific datadir location. (default: %s)", BITCOIN_PID_FILENAME), false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-prune=<n>", "Pruning is not supported", false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-reindex", "Rebuild chain state and block index from the blk*.dat files on disk", false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-reindex-chainstate", "Rebuild chain state from the currently indexed blocks. When in pruning mode or if blocks on disk might be corrupted, use full -reindex instead.", false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-staking", "Mine blocks on this node (default: 1). Can be used to specify search interval, staking=number_of_seconds (default: 15)", false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-stakingwithoutpeers", "Proceeds with staking even though no peers were detected. Mainly used for testing, this could put you on a fork. (default: 0)", false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-minstakeamount", strprintf("Only stakes UTXOs greater than or equal to this amount (default: %d)", 0), false, OptionsCategory::OPTIONS);
  #ifndef WIN32
      gArgs.AddArg("-sysperms", "Create new files with system default permissions, instead of umask 077 (only effective with disabled wallet functionality)", false, OptionsCategory::OPTIONS);
  #else
      hidden_args.emplace_back("-sysperms");
  #endif
      gArgs.AddArg("-txindex", "Scalaris requires txindex to support the Proof of Stake protocol.", false, OptionsCategory::OPTIONS);
      gArgs.AddArg("-lowmemoryload", "Use less memory during initial load. This may result in longer load times, however, may improve loading on memory constrained devices if out of memory errors persist (e.g. Rasp Pi)", false, OptionsCategory::OPTIONS);
  
      gArgs.AddArg("-addnode=<ip>", "Add a node to connect to and attempt to keep the connection open (see the `addnode` RPC command help for more info). This option can be specified multiple times to add multiple nodes.", false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-banscore=<n>", strprintf("Threshold for disconnecting misbehaving peers (default: %u)", DEFAULT_BANSCORE_THRESHOLD), false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-bantime=<n>", strprintf("Number of seconds to keep misbehaving peers from reconnecting (default: %u)", DEFAULT_MISBEHAVING_BANTIME), false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-bind=<addr>", "Bind to given address and always listen on it. Use [host]:port notation for IPv6", false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-connect=<ip>", "Connect only to the specified node; -noconnect disables automatic connections (the rules for this peer are the same as for -addnode). This option can be specified multiple times to connect to multiple nodes.", false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-discover", "Discover own IP addresses (default: 1 when listening and no -externalip or -proxy)", false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-dns", strprintf("Allow DNS lookups for -addnode, -seednode and -connect (default: %u)", DEFAULT_NAME_LOOKUP), false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-dnsseed", "Query for peer addresses via DNS lookup, if low on addresses (default: 1 unless -connect used)", false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-enablebip61", strprintf("Send reject messages per BIP61 (default: %u)", DEFAULT_ENABLE_BIP61), false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-externalip=<ip>", "Specify your own public address", false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-forcednsseed", strprintf("Always query for peer addresses via DNS lookup (default: %u)", DEFAULT_FORCEDNSSEED), false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-listen", "Accept connections from outside (default: 1 if no -proxy or -connect)", false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-listenonion", strprintf("Automatically create Tor hidden service (default: %d)", DEFAULT_LISTEN_ONION), false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-maxconnections=<n>", strprintf("Maintain at most <n> connections to peers (default: %u)", DEFAULT_MAX_PEER_CONNECTIONS), false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-maxreceivebuffer=<n>", strprintf("Maximum per-connection receive buffer, <n>*1000 bytes (default: %u)", DEFAULT_MAXRECEIVEBUFFER), false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-maxsendbuffer=<n>", strprintf("Maximum per-connection send buffer, <n>*1000 bytes (default: %u)", DEFAULT_MAXSENDBUFFER), false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-maxtimeadjustment", strprintf("Maximum allowed median peer time offset adjustment. Local perspective of time may be influenced by peers forward or backward by this amount. (default: %u seconds)", DEFAULT_MAX_TIME_ADJUSTMENT), false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-maxuploadtarget=<n>", strprintf("Tries to keep outbound traffic under the given target (in MiB per 24h), 0 = no limit (default: %d)", DEFAULT_MAX_UPLOAD_TARGET), false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-onion=<ip:port>", "Use separate SOCKS5 proxy to reach peers via Tor hidden services, set -noonion to disable (default: -proxy)", false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-onlynet=<net>", "Make outgoing connections only through network <net> (ipv4, ipv6 or onion). Incoming connections are not affected by this option. This option can be specified multiple times to allow multiple networks.", false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-peerbloomfilters", strprintf("Support filtering of blocks and transaction with bloom filters (default: %u)", DEFAULT_PEERBLOOMFILTERS), false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-permitbaremultisig", strprintf("Relay non-P2SH multisig (default: %u)", DEFAULT_PERMIT_BAREMULTISIG), false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-port=<port>", strprintf("Listen for connections on <port> (default: %u, testnet: %u, regtest: %u)", defaultChainParams->GetDefaultPort(), testnetChainParams->GetDefaultPort(), regtestChainParams->GetDefaultPort()), false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-proxy=<ip:port>", "Connect through SOCKS5 proxy, set -noproxy to disable (default: disabled)", false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-proxyrandomize", strprintf("Randomize credentials for every proxy connection. This enables Tor stream isolation (default: %u)", DEFAULT_PROXYRANDOMIZE), false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-seednode=<ip>", "Connect to a node to retrieve peer addresses, and disconnect. This option can be specified multiple times to connect to multiple nodes.", false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-timeout=<n>", strprintf("Specify connection timeout in milliseconds (minimum: 1, default: %d)", DEFAULT_CONNECT_TIMEOUT), false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-peertimeout=<n>", strprintf("Specify p2p connection timeout in seconds. This option determines the amount of time a peer may be inactive before the connection to it is dropped. (minimum: 1, default: %d)", DEFAULT_PEER_CONNECT_TIMEOUT), true, OptionsCategory::CONNECTION);
      gArgs.AddArg("-torcontrol=<ip>:<port>", strprintf("Tor control port to use if onion listening enabled (default: %s)", DEFAULT_TOR_CONTROL), false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-torpassword=<pass>", "Tor control port password (default: empty)", false, OptionsCategory::CONNECTION);
  #ifdef USE_UPNP
  #if USE_UPNP
      gArgs.AddArg("-upnp", "Use UPnP to map the listening port (default: 1 when listening and no -proxy)", false, OptionsCategory::CONNECTION);
  #else
      gArgs.AddArg("-upnp", strprintf("Use UPnP to map the listening port (default: %u)", 0), false, OptionsCategory::CONNECTION);
  #endif
  #else
      hidden_args.emplace_back("-upnp");
  #endif
      gArgs.AddArg("-whitebind=<addr>", "Bind to given address and whitelist peers connecting to it. Use [host]:port notation for IPv6", false, OptionsCategory::CONNECTION);
      gArgs.AddArg("-whitelist=<IP address or network>", "Whitelist peers connecting from the given IP address (e.g. 1.2.3.4) or CIDR notated network (e.g. 1.2.3.0/24). 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", false, OptionsCategory::CONNECTION);
  
      g_wallet_init_interface.AddWalletOptions();
  
  #if ENABLE_ZMQ
      gArgs.AddArg("-zmqpubhashblock=<address>", "Enable publish hash block in <address>", false, OptionsCategory::ZMQ);
      gArgs.AddArg("-zmqpubhashtx=<address>", "Enable publish hash transaction in <address>", false, OptionsCategory::ZMQ);
      gArgs.AddArg("-zmqpubrawblock=<address>", "Enable publish raw block in <address>", false, OptionsCategory::ZMQ);
      gArgs.AddArg("-zmqpubrawtx=<address>", "Enable publish raw transaction in <address>", false, OptionsCategory::ZMQ);
      gArgs.AddArg("-zmqpubhashblockhwm=<n>", strprintf("Set publish hash block outbound message high water mark (default: %d)", CZMQAbstractNotifier::DEFAULT_ZMQ_SNDHWM), false, OptionsCategory::ZMQ);
      gArgs.AddArg("-zmqpubhashtxhwm=<n>", strprintf("Set publish hash transaction outbound message high water mark (default: %d)", CZMQAbstractNotifier::DEFAULT_ZMQ_SNDHWM), false, OptionsCategory::ZMQ);
      gArgs.AddArg("-zmqpubrawblockhwm=<n>", strprintf("Set publish raw block outbound message high water mark (default: %d)", CZMQAbstractNotifier::DEFAULT_ZMQ_SNDHWM), false, OptionsCategory::ZMQ);
      gArgs.AddArg("-zmqpubrawtxhwm=<n>", strprintf("Set publish raw transaction outbound message high water mark (default: %d)", CZMQAbstractNotifier::DEFAULT_ZMQ_SNDHWM), false, OptionsCategory::ZMQ);
  #else
      hidden_args.emplace_back("-zmqpubhashblock=<address>");
      hidden_args.emplace_back("-zmqpubhashtx=<address>");
      hidden_args.emplace_back("-zmqpubrawblock=<address>");
      hidden_args.emplace_back("-zmqpubrawtx=<address>");
      hidden_args.emplace_back("-zmqpubhashblockhwm=<n>");
      hidden_args.emplace_back("-zmqpubhashtxhwm=<n>");
      hidden_args.emplace_back("-zmqpubrawblockhwm=<n>");
      hidden_args.emplace_back("-zmqpubrawtxhwm=<n>");
  #endif
  
      gArgs.AddArg("-checkblocks=<n>", strprintf("How many blocks to check at startup (default: %u, 0 = all)", DEFAULT_CHECKBLOCKS), true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-checklevel=<n>", strprintf("How thorough the block verification of -checkblocks is: "
          "level 0 reads the blocks from disk, "
          "level 1 verifies block validity, "
          "level 2 verifies undo data, "
          "level 3 checks disconnection of tip blocks, "
          "and level 4 tries to reconnect the blocks, "
          "each level includes the checks of the previous levels "
          "(0-4, default: %u)", DEFAULT_CHECKLEVEL), true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-checkblockindex", strprintf("Do a full consistency check for mapBlockIndex, setBlockIndexCandidates, chainActive and mapBlocksUnlinked occasionally. (default: %u, regtest: %u)", defaultChainParams->DefaultConsistencyChecks(), regtestChainParams->DefaultConsistencyChecks()), true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-checkmempool=<n>", strprintf("Run checks every <n> transactions (default: %u, regtest: %u)", defaultChainParams->DefaultConsistencyChecks(), regtestChainParams->DefaultConsistencyChecks()), true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-checkpoints", strprintf("Disable expensive verification for known chain history (default: %u)", DEFAULT_CHECKPOINTS_ENABLED), true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-deprecatedrpc=<method>", "Allows deprecated RPC method(s) to be used", true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-dropmessagestest=<n>", "Randomly drop 1 of every <n> network messages", true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-stopafterblockimport", strprintf("Stop running after importing blocks from disk (default: %u)", DEFAULT_STOPAFTERBLOCKIMPORT), true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-stopatheight", strprintf("Stop running after reaching the given height in the main chain (default: %u)", DEFAULT_STOPATHEIGHT), true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-limitancestorcount=<n>", strprintf("Do not accept transactions if number of in-mempool ancestors is <n> or more (default: %u)", DEFAULT_ANCESTOR_LIMIT), true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-limitancestorsize=<n>", strprintf("Do not accept transactions whose size with all in-mempool ancestors exceeds <n> kilobytes (default: %u)", DEFAULT_ANCESTOR_SIZE_LIMIT), true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-limitdescendantcount=<n>", strprintf("Do not accept transactions if any ancestor would have <n> or more in-mempool descendants (default: %u)", DEFAULT_DESCENDANT_LIMIT), true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-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), true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-addrmantest", "Allows to test address relay on localhost", true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-debug=<category>", "Output debugging information (default: -nodebug, supplying <category> is optional). "
          "If <category> is not supplied or if <category> = 1, output all debugging information. <category> can be: " + ListLogCategories() + ".", false, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-debugexclude=<category>", strprintf("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."), false, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-logips", strprintf("Include IP addresses in debug output (default: %u)", DEFAULT_LOGIPS), false, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-logtimestamps", strprintf("Prepend debug output with timestamp (default: %u)", DEFAULT_LOGTIMESTAMPS), false, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-logtimemicros", strprintf("Add microsecond precision to debug timestamps (default: %u)", DEFAULT_LOGTIMEMICROS), true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-mocktime=<n>", "Replace actual time with <n> seconds since epoch (default: 0)", true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-maxsigcachesize=<n>", strprintf("Limit sum of signature cache and script execution cache sizes to <n> MiB (default: %u)", DEFAULT_MAX_SIG_CACHE_SIZE), true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-maxtipage=<n>", strprintf("Maximum tip age in seconds to consider node in initial block download (default: %u)", DEFAULT_MAX_TIP_AGE), true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-maxtxfee=<amt>", strprintf("Maximum total fees (in %s) to use in a single wallet transaction or raw transaction; setting this too low may abort large transactions (default: %s)",
          CURRENCY_UNIT, FormatMoney(DEFAULT_TRANSACTION_MAXFEE)), false, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-printpriority", strprintf("Log transaction fee per kB when mining blocks (default: %u)", DEFAULT_PRINTPRIORITY), true, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-printtoconsole", "Send trace/debug info to console (default: 1 when no -daemon. To disable logging to file, set -nodebuglogfile)", false, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-shrinkdebugfile", "Shrink debug.log file on client startup (default: 1 when no -debug)", false, OptionsCategory::DEBUG_TEST);
      gArgs.AddArg("-uacomment=<cmt>", "Append comment to the user agent string", false, OptionsCategory::DEBUG_TEST);
  
      SetupChainParamsBaseOptions();
  
      gArgs.AddArg("-acceptnonstdtxn", strprintf("Relay and mine \"non-standard\" transactions (%sdefault: %u)", "testnet/regtest only; ", !testnetChainParams->RequireStandard()), true, OptionsCategory::NODE_RELAY);
      gArgs.AddArg("-incrementalrelayfee=<amt>", strprintf("Fee rate (in %s/kB) used to define cost of relay, used for mempool limiting and BIP 125 replacement. (default: %s)", CURRENCY_UNIT, FormatMoney(DEFAULT_INCREMENTAL_RELAY_FEE)), true, OptionsCategory::NODE_RELAY);
      gArgs.AddArg("-dustrelayfee=<amt>", strprintf("Fee rate (in %s/kB) used to defined dust, the value of an output such that it will cost more than its value in fees at this fee rate to spend it. (default: %s)", CURRENCY_UNIT, FormatMoney(DUST_RELAY_TX_FEE)), true, OptionsCategory::NODE_RELAY);
      gArgs.AddArg("-bytespersigop", strprintf("Equivalent bytes per sigop in transactions for relay and mining (default: %u)", DEFAULT_BYTES_PER_SIGOP), false, OptionsCategory::NODE_RELAY);
      gArgs.AddArg("-datacarrier", strprintf("Relay and mine data carrier transactions (default: %u)", DEFAULT_ACCEPT_DATACARRIER), false, OptionsCategory::NODE_RELAY);
      gArgs.AddArg("-datacarriersize", strprintf("Maximum size of data in data carrier transactions we relay and mine (default: %u)", MAX_OP_RETURN_RELAY), false, OptionsCategory::NODE_RELAY);
      gArgs.AddArg("-mempoolreplacement", strprintf("Enable transaction replacement in the memory pool (default: %u)", DEFAULT_ENABLE_REPLACEMENT), false, OptionsCategory::NODE_RELAY);
      gArgs.AddArg("-minrelaytxfee=<amt>", strprintf("Fees (in %s/kB) smaller than this are considered zero fee for relaying, mining and transaction creation (default: %s)",
          CURRENCY_UNIT, FormatMoney(DEFAULT_MIN_RELAY_TX_FEE)), false, OptionsCategory::NODE_RELAY);
      gArgs.AddArg("-whitelistforcerelay", strprintf("Force relay of transactions from whitelisted peers even if they violate local relay policy (default: %d)", DEFAULT_WHITELISTFORCERELAY), false, OptionsCategory::NODE_RELAY);
      gArgs.AddArg("-whitelistrelay", strprintf("Accept relayed transactions received from whitelisted peers even when not relaying transactions (default: %d)", DEFAULT_WHITELISTRELAY), false, OptionsCategory::NODE_RELAY);
  
  
      gArgs.AddArg("-blockmaxweight=<n>", strprintf("Set maximum BIP141 block weight (default: %d)", DEFAULT_BLOCK_MAX_WEIGHT), false, OptionsCategory::BLOCK_CREATION);
      gArgs.AddArg("-blockmintxfee=<amt>", strprintf("Set lowest fee rate (in %s/kB) for transactions to be included in block creation. (default: %s)", CURRENCY_UNIT, FormatMoney(DEFAULT_BLOCK_MIN_TX_FEE)), false, OptionsCategory::BLOCK_CREATION);
      gArgs.AddArg("-blockversion=<n>", "Override block version to test forking scenarios", true, OptionsCategory::BLOCK_CREATION);
  
      gArgs.AddArg("-rest", strprintf("Accept public REST requests (default: %u)", DEFAULT_REST_ENABLE), false, OptionsCategory::RPC);
      gArgs.AddArg("-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", false, OptionsCategory::RPC);
      gArgs.AddArg("-rpcauth=<userpw>", "Username and HMAC-SHA-256 hashed password for JSON-RPC connections. The field <userpw> comes in the format: <USERNAME>:<SALT>$<HASH>. A canonical python script is included in share/rpcauth. The client then connects normally using the rpcuser=<USERNAME>/rpcpassword=<PASSWORD> pair of arguments. This option can be specified multiple times", false, OptionsCategory::RPC);
      gArgs.AddArg("-rpcbind=<addr>[:port]", "Bind to given address to listen for JSON-RPC connections. Do not expose the RPC server to untrusted networks such as the public internet! This option is ignored unless -rpcallowip is also passed. Port is optional and overrides -rpcport. Use [host]:port notation for IPv6. This option can be specified multiple times (default: 127.0.0.1 and ::1 i.e., localhost)", false, OptionsCategory::RPC);
      gArgs.AddArg("-rpccookiefile=<loc>", "Location of the auth cookie. Relative paths will be prefixed by a net-specific datadir location. (default: data dir)", false, OptionsCategory::RPC);
      gArgs.AddArg("-rpcpassword=<pw>", "Password for JSON-RPC connections", false, OptionsCategory::RPC);
      gArgs.AddArg("-rpcport=<port>", strprintf("Listen for JSON-RPC connections on <port> (default: %u, testnet: %u, regtest: %u)", defaultBaseParams->RPCPort(), testnetBaseParams->RPCPort(), regtestBaseParams->RPCPort()), false, OptionsCategory::RPC);
      gArgs.AddArg("-rpcserialversion", strprintf("Sets the serialization of raw transaction or block hex returned in non-verbose mode, non-segwit(0) or segwit(1) (default: %d)", DEFAULT_RPC_SERIALIZE_VERSION), false, OptionsCategory::RPC);
      gArgs.AddArg("-rpcservertimeout=<n>", strprintf("Timeout during HTTP requests (default: %d)", DEFAULT_HTTP_SERVER_TIMEOUT), true, OptionsCategory::RPC);
      gArgs.AddArg("-rpcthreads=<n>", strprintf("Set the number of threads to service RPC calls (default: %d)", DEFAULT_HTTP_THREADS), false, OptionsCategory::RPC);
      gArgs.AddArg("-rpcuser=<user>", "Username for JSON-RPC connections", false, OptionsCategory::RPC);
      gArgs.AddArg("-rpcworkqueue=<n>", strprintf("Set the depth of the work queue to service RPC calls (default: %d)", DEFAULT_HTTP_WORKQUEUE), true, OptionsCategory::RPC);
      gArgs.AddArg("-server", "Accept command line and JSON-RPC commands", false, OptionsCategory::RPC);
  
      // Governance
      gArgs.AddArg("-proposaladdress", "Spend funds from this address when submitting proposals", false, OptionsCategory::GOVERNANCE);
      gArgs.AddArg("-voteinputamount", strprintf("Look for utxos around this size or larger for use with voting inputs (default: %d)", gov::VOTING_UTXO_INPUT_AMOUNT), false, OptionsCategory::GOVERNANCE);
  
      // XBridge
      gArgs.AddArg("-servicenode", strprintf("Auto register this service node on application start (default: %u)", false), false, OptionsCategory::XBRIDGE);
      gArgs.AddArg("-enableexchange", strprintf("Enable exchange mode on this service node (default: %u)", false), false, OptionsCategory::XBRIDGE);
      gArgs.AddArg("-orderinputscheck", strprintf("Time interval for the utxo validity check on order inputs (default: %d seconds)", 900), false, OptionsCategory::XBRIDGE);
      gArgs.AddArg("-maxmempoolxbridge", strprintf("Maximum size in MB (megabytes) for the xbridge mempool (default: %dMB)", 128), false, OptionsCategory::XBRIDGE);
      gArgs.AddArg("-dxnowallets", strprintf("Show all orders across the network for non-local wallets"), false, OptionsCategory::XBRIDGE);
      gArgs.AddArg("-rpcxbridgetimeout", strprintf("Timeout for internal XBridge RPC calls (default: %d seconds)", 120), false, OptionsCategory::XBRIDGE);
  
      // XRouter
      gArgs.AddArg("-xrouter", strprintf("Enable XRouter services (default: %u)", true), false, OptionsCategory::XROUTER);
      gArgs.AddArg("-xrouterbanscore", strprintf("Ban XRouter nodes who's score is lower than this value (default: %u)", -200), false, OptionsCategory::XROUTER);
      gArgs.AddArg("-rpcxroutertimeout", strprintf("Timeout for internal XRouter RPC calls (default: %d seconds)", 60), false, OptionsCategory::XROUTER);
  
      // Misc
      gArgs.AddArg("-printstakemodifier", strprintf("Prints the stake modifier to the log (default: %u)", false), false, OptionsCategory::HIDDEN);
  
  #if HAVE_DECL_DAEMON
      gArgs.AddArg("-daemon", "Run in the background as a daemon and accept commands", false, OptionsCategory::OPTIONS);
  #else
      hidden_args.emplace_back("-daemon");
  #endif
  
      // Add the hidden options
      gArgs.AddHiddenArgs(hidden_args);
  }
  
  std::string LicenseInfo()
  {
      const std::string URL_SOURCE_CODE = "<https://github.com/mraksoll4/blocknet>";
      const std::string URL_WEBSITE = "<https://scalaris.info>";
      const std::string copyrightText = "Copyright (c) 2009-2019 The Bitcoin Core developers\n"
                                        "Copyright (c) 2014-2020 The Blocknet developers";
  									  "Copyright (c) 2020-2021 The Scalaris developers";
  
      return copyrightText + "\n" +
             "\n" +
             strprintf(_("Please contribute if you find %s useful. "
                         "Visit %s for further information about the software."),
                 PACKAGE_NAME, URL_WEBSITE) +
             "\n" +
             strprintf(_("The source code is available from %s."),
                 URL_SOURCE_CODE) +
             "\n" +
             "\n" +
             _("This is experimental software.") + "\n" +
             strprintf(_("Distributed under the MIT software license, see the accompanying file %s or %s"), "COPYING", "<https://opensource.org/licenses/MIT>") + "\n" +
             "\n" +
             strprintf(_("This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit %s and cryptographic software written by Eric Young and UPnP software written by Thomas Bernard."), "<https://www.openssl.org>") +
             "\n";
  }
  
  static void BlockNotifyCallback(bool initialSync, const CBlockIndex *pBlockIndex)
  {
      if (initialSync || !pBlockIndex)
          return;
  
      std::string strCmd = gArgs.GetArg("-blocknotify", "");
      if (!strCmd.empty()) {
          boost::replace_all(strCmd, "%s", pBlockIndex->GetBlockHash().GetHex());
          std::thread t(runCommand, strCmd);
          t.detach(); // thread runs free
      }
  }
  
  static bool fHaveGenesis = false;
  static Mutex g_genesis_wait_mutex;
  static std::condition_variable g_genesis_wait_cv;
  static bool fTxIndexReady = false;
  static Mutex g_wait_index_mutex;
  static std::condition_variable g_wait_index_cv;
  
  static void BlockNotifyGenesisWait(bool, const CBlockIndex *pBlockIndex)
  {
      if (pBlockIndex != nullptr) {
          {
              LOCK(g_genesis_wait_mutex);
              fHaveGenesis = true;
          }
          g_genesis_wait_cv.notify_all();
      }
  }
  
  struct CImportingNow
  {
      CImportingNow() {
          assert(fImporting == false);
          fImporting = true;
      }
  
      ~CImportingNow() {
          assert(fImporting == true);
          fImporting = false;
      }
  };
  
  
  // If we're using -prune with -reindex, then delete block files that will be ignored by the
  // reindex.  Since reindexing works by starting at block file 0 and looping until a blockfile
  // is missing, do the same here to delete any later block files after a gap.  Also delete all
  // rev files since they'll be rewritten by the reindex anyway.  This ensures that vinfoBlockFile
  // is in sync with what's actually on disk by the time we start downloading, so that pruning
  // works correctly.
  static void CleanupBlockRevFiles()
  {
      std::map<std::string, fs::path> mapBlockFiles;
  
      // Glob all blk?????.dat and rev?????.dat files from the blocks directory.
      // Remove the rev files immediately and insert the blk file paths into an
      // ordered map keyed by block file index.
      LogPrintf("Removing unusable blk?????.dat and rev?????.dat files for -reindex with -prune\n");
      fs::path blocksdir = GetBlocksDir();
      for (fs::directory_iterator it(blocksdir); it != fs::directory_iterator(); it++) {
          if (fs::is_regular_file(*it) &&
              it->path().filename().string().length() == 12 &&
              it->path().filename().string().substr(8,4) == ".dat")
          {
              if (it->path().filename().string().substr(0,3) == "blk")
                  mapBlockFiles[it->path().filename().string().substr(3,5)] = it->path();
              else if (it->path().filename().string().substr(0,3) == "rev")
                  remove(it->path());
          }
      }
  
      // Remove all block files that aren't part of a contiguous set starting at
      // zero by walking the ordered map (keys are block file indices) by
      // keeping a separate counter.  Once we hit a gap (or if 0 doesn't exist)
      // start removing block files.
      int nContigCounter = 0;
      for (const std::pair<const std::string, fs::path>& item : mapBlockFiles) {
          if (atoi(item.first) == nContigCounter) {
              nContigCounter++;
              continue;
          }
          remove(item.second);
      }
  }
  
  static void ThreadImport(std::vector<fs::path> vImportFiles)
  {
      const CChainParams& chainparams = Params();
      RenameThread("scalaris-loadblk");
      ScheduleBatchPriority();
  
      {
      CImportingNow imp;
  
      // -reindex
      if (fReindex) {
          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(chainparams, file, &pos);
              nFile++;
          }
          pblocktree->WriteReindexing(false);
          fReindex = false;
          LogPrintf("Reindexing finished\n");
          // To avoid ending up in a situation without genesis block, re-try initializing (no-op if reindexing worked):
          LoadGenesisBlock(chainparams);
      }
  
      // hardcoded $DATADIR/bootstrap.dat
      fs::path pathBootstrap = GetDataDir() / "bootstrap.dat";
      if (fs::exists(pathBootstrap)) {
          FILE *file = fsbridge::fopen(pathBootstrap, "rb");
          if (file) {
              fs::path pathBootstrapOld = GetDataDir() / "bootstrap.dat.old";
              LogPrintf("Importing bootstrap.dat...\n");
              LoadExternalBlockFile(chainparams, file);
              RenameOver(pathBootstrap, pathBootstrapOld);
          } else {
              LogPrintf("Warning: Could not open bootstrap file %s\n", pathBootstrap.string());
          }
      }
  
      // -loadblock=
      for (const fs::path& path : vImportFiles) {
          FILE *file = fsbridge::fopen(path, "rb");
          if (file) {
              LogPrintf("Importing blocks file %s...\n", path.string());
              LoadExternalBlockFile(chainparams, file);
          } else {
              LogPrintf("Warning: Could not open blocks file %s\n", path.string());
          }
      }
  
      // Blocknet PoS sync txindex
      g_txindex->Sync();
  
      // scan for better chains in the block chain database, that are not yet connected in the active best chain
      CValidationState state;
      if (!ActivateBestChain(state, chainparams)) {
          LogPrintf("Failed to connect best block (%s)\n", FormatStateMessage(state));
          StartShutdown();
          return;
      }
  
      if (gArgs.GetBoolArg("-stopafterblockimport", DEFAULT_STOPAFTERBLOCKIMPORT)) {
          LogPrintf("Stopping after block import\n");
          StartShutdown();
          return;
      }
  
      // Notify txindex sync listeners that it's ready
      {
          LOCK(g_wait_index_mutex);
          fTxIndexReady = true;
      }
      g_wait_index_cv.notify_all();
  
      } // End scope of CImportingNow
      if (gArgs.GetArg("-persistmempool", DEFAULT_PERSIST_MEMPOOL)) {
          LoadMempool();
      }
      g_is_mempool_loaded = !ShutdownRequested();
  }
  
  /** Sanity checks
   *  Ensure that Bitcoin is running in a usable environment with all
   *  necessary library support.
   */
  static bool InitSanityCheck()
  {
      if(!ECC_InitSanityCheck()) {
          InitError("Elliptic curve cryptography sanity check failure. Aborting.");
          return false;
      }
  
      if (!glibc_sanity_test() || !glibcxx_sanity_test())
          return false;
  
      if (!Random_SanityCheck()) {
          InitError("OS cryptographic RNG sanity check failure. Aborting.");
          return false;
      }
  
      return true;
  }
  
  static bool AppInitServers()
  {
      RPCServer::OnStarted(&OnRPCStarted);
      RPCServer::OnStopped(&OnRPCStopped);
      if (!InitHTTPServer())
          return false;
      StartRPC();
      if (!StartHTTPRPC())
          return false;
      if (gArgs.GetBoolArg("-rest", DEFAULT_REST_ENABLE)) StartREST();
      StartHTTPServer();
      return true;
  }
  
  // Parameter interaction based on rules
  void InitParameterInteraction()
  {
      // when specifying an explicit binding address, you want to listen on it
      // even when -connect or -proxy is specified
      if (gArgs.IsArgSet("-bind")) {
          if (gArgs.SoftSetBoolArg("-listen", true))
              LogPrintf("%s: parameter interaction: -bind set -> setting -listen=1\n", __func__);
      }
      if (gArgs.IsArgSet("-whitebind")) {
          if (gArgs.SoftSetBoolArg("-listen", true))
              LogPrintf("%s: parameter interaction: -whitebind set -> setting -listen=1\n", __func__);
      }
  
      if (gArgs.IsArgSet("-connect")) {
          // when only connecting to trusted nodes, do not seed via DNS, or listen by default
          if (gArgs.SoftSetBoolArg("-dnsseed", false))
              LogPrintf("%s: parameter interaction: -connect set -> setting -dnsseed=0\n", __func__);
          if (gArgs.SoftSetBoolArg("-listen", false))
              LogPrintf("%s: parameter interaction: -connect set -> setting -listen=0\n", __func__);
      }
  
      if (gArgs.IsArgSet("-proxy")) {
          // to protect privacy, do not listen by default if a default proxy server is specified
          if (gArgs.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 (gArgs.SoftSetBoolArg("-upnp", false))
              LogPrintf("%s: parameter interaction: -proxy set -> setting -upnp=0\n", __func__);
          // to protect privacy, do not discover addresses by default
          if (gArgs.SoftSetBoolArg("-discover", false))
              LogPrintf("%s: parameter interaction: -proxy set -> setting -discover=0\n", __func__);
      }
  
      if (!gArgs.GetBoolArg("-listen", DEFAULT_LISTEN)) {
          // do not map ports or try to retrieve public IP when not listening (pointless)
          if (gArgs.SoftSetBoolArg("-upnp", false))
              LogPrintf("%s: parameter interaction: -listen=0 -> setting -upnp=0\n", __func__);
          if (gArgs.SoftSetBoolArg("-discover", false))
              LogPrintf("%s: parameter interaction: -listen=0 -> setting -discover=0\n", __func__);
          if (gArgs.SoftSetBoolArg("-listenonion", false))
              LogPrintf("%s: parameter interaction: -listen=0 -> setting -listenonion=0\n", __func__);
      }
  
      if (gArgs.IsArgSet("-externalip")) {
          // if an explicit public IP is specified, do not try to find others
          if (gArgs.SoftSetBoolArg("-discover", false))
              LogPrintf("%s: parameter interaction: -externalip set -> setting -discover=0\n", __func__);
      }
  
      // disable whitelistrelay in blocksonly mode
      if (gArgs.GetBoolArg("-blocksonly", DEFAULT_BLOCKSONLY)) {
          if (gArgs.SoftSetBoolArg("-whitelistrelay", false))
              LogPrintf("%s: parameter interaction: -blocksonly=1 -> setting -whitelistrelay=0\n", __func__);
      }
  
      // Forcing relay from whitelisted hosts implies we will accept relays from them in the first place.
      if (gArgs.GetBoolArg("-whitelistforcerelay", DEFAULT_WHITELISTFORCERELAY)) {
          if (gArgs.SoftSetBoolArg("-whitelistrelay", true))
              LogPrintf("%s: parameter interaction: -whitelistforcerelay=1 -> setting -whitelistrelay=1\n", __func__);
      }
  
      // Warn if network-specific options (-addnode, -connect, etc) are
      // specified in default section of config file, but not overridden
      // on the command line or in this network's section of the config file.
      std::string network = gArgs.GetChainName();
      for (const auto& arg : gArgs.GetUnsuitableSectionOnlyArgs()) {
          InitWarning(strprintf(_("Config setting for %s only applied on %s network when in [%s] section."), arg, network, network));
      }
  
      // Warn if unrecognized section name are present in the config file.
      for (const auto& section : gArgs.GetUnrecognizedSections()) {
          InitWarning(strprintf(_("Section [%s] is not recognized."), section));
      }
  }
  
  static std::string ResolveErrMsg(const char * const optname, const std::string& strBind)
  {
      return strprintf(_("Cannot resolve -%s address: '%s'"), optname, strBind);
  }
  
  /**
   * Initialize global loggers.
   *
   * Note that this is called very early in the process lifetime, so you should be
   * careful about what global state you rely on here.
   */
  void InitLogging()
  {
      LogInstance().m_print_to_file = !gArgs.IsArgNegated("-debuglogfile");
      LogInstance().m_file_path = AbsPathForConfigVal(gArgs.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");
  
      LogInstance().m_print_to_console = gArgs.GetBoolArg("-printtoconsole", !gArgs.GetBoolArg("-daemon", false));
      LogInstance().m_log_timestamps = gArgs.GetBoolArg("-logtimestamps", DEFAULT_LOGTIMESTAMPS);
      LogInstance().m_log_time_micros = gArgs.GetBoolArg("-logtimemicros", DEFAULT_LOGTIMEMICROS);
  
      fLogIPs = gArgs.GetBoolArg("-logips", DEFAULT_LOGIPS);
  
      std::string version_string = FormatFullVersion();
  #ifdef DEBUG
      version_string += " (debug build)";
  #else
      version_string += " (release build)";
  #endif
      LogPrintf(PACKAGE_NAME " version %s\n", version_string);
  }
  
  namespace { // Variables internal to initialization process only
  
  int nMaxConnections;
  int nUserMaxConnections;
  int nFD;
  ServiceFlags nLocalServices = ServiceFlags(NODE_NETWORK | NODE_NETWORK_LIMITED);
  int64_t peer_connect_timeout;
  
  } // namespace
  
  [[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, nullptr, OPEN_EXISTING, 0, 0));
      // 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)
      SetProcessDEPPolicy(PROCESS_DEP_ENABLE);
  #endif
  
      if (!SetupNetworking())
          return InitError("Initializing networking failed");
  
  #ifndef WIN32
      if (!gArgs.GetBoolArg("-sysperms", false)) {
          umask(077);
      }
  
      // Clean shutdown on SIGTERM
      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);
  #else
      SetConsoleCtrlHandler(consoleCtrlHandler, true);
  #endif
  
      std::set_new_handler(new_handler_terminate);
  
      return true;
  }
  
  bool AppInitParameterInteraction()
  {
      const CChainParams& chainparams = Params();
      // ********************************************************* Step 2: parameter interactions
  
      // also see: InitParameterInteraction()
  
      if (!fs::is_directory(GetBlocksDir())) {
          return InitError(strprintf(_("Specified blocks directory \"%s\" does not exist."), gArgs.GetArg("-blocksdir", "").c_str()));
      }
  
      // if using block pruning, then disallow txindex
      if (gArgs.GetArg("-prune", 0)) {
  //        if (gArgs.GetBoolArg("-txindex", DEFAULT_TXINDEX))
  //            return InitError(_("Prune mode is incompatible with -txindex."));
          return InitError(_("Pruning is not supported at this time")); // Blocknet doesn't support pruning at this time
      }
  
      // -bind and -whitebind can't be set when not listening
      size_t nUserBind = gArgs.GetArgs("-bind").size() + gArgs.GetArgs("-whitebind").size();
      if (nUserBind != 0 && !gArgs.GetBoolArg("-listen", DEFAULT_LISTEN)) {
          return InitError("Cannot set -bind or -whitebind together with -listen=0");
      }
  
      // Make sure enough file descriptors are available
      int nBind = std::max(nUserBind, size_t(1));
      nUserMaxConnections = gArgs.GetArg("-maxconnections", DEFAULT_MAX_PEER_CONNECTIONS);
      nMaxConnections = std::max(nUserMaxConnections, 0);
  
      // Trim requested connection counts, to fit into system limitations
      // <int> in std::min<int>(...) to work around FreeBSD compilation issue described in #2695
      nFD = RaiseFileDescriptorLimit(nMaxConnections + MIN_CORE_FILEDESCRIPTORS + MAX_ADDNODE_CONNECTIONS);
  #ifdef USE_POLL
      int fd_max = nFD;
  #else
      int fd_max = FD_SETSIZE;
  #endif
      nMaxConnections = std::max(std::min<int>(nMaxConnections, fd_max - nBind - MIN_CORE_FILEDESCRIPTORS - MAX_ADDNODE_CONNECTIONS), 0);
      if (nFD < MIN_CORE_FILEDESCRIPTORS)
          return InitError(_("Not enough file descriptors available."));
      nMaxConnections = std::min(nFD - MIN_CORE_FILEDESCRIPTORS - MAX_ADDNODE_CONNECTIONS, nMaxConnections);
  
      if (nMaxConnections < nUserMaxConnections)
          InitWarning(strprintf(_("Reducing -maxconnections from %d to %d, because of system limitations."), nUserMaxConnections, nMaxConnections));
  
      // ********************************************************* Step 3: parameter-to-internal-flags
      if (gArgs.IsArgSet("-debug")) {
          // Special-case: if -debug=0/-nodebug is set, turn off debugging messages
          const std::vector<std::string> categories = gArgs.GetArgs("-debug");
  
          if (std::none_of(categories.begin(), categories.end(),
              [](std::string cat){return cat == "0" || cat == "none";})) {
              for (const auto& cat : categories) {
                  if (!LogInstance().EnableCategory(cat)) {
                      InitWarning(strprintf(_("Unsupported logging category %s=%s."), "-debug", cat));
                  }
              }
          }
      }
  
      // Now remove the logging categories which were explicitly excluded
      for (const std::string& cat : gArgs.GetArgs("-debugexclude")) {
          if (!LogInstance().DisableCategory(cat)) {
              InitWarning(strprintf(_("Unsupported logging category %s=%s."), "-debugexclude", cat));
          }
      }
  
      // Checkmempool and checkblockindex default to true in regtest mode
      int ratio = std::min<int>(std::max<int>(gArgs.GetArg("-checkmempool", chainparams.DefaultConsistencyChecks() ? 1 : 0), 0), 1000000);
      if (ratio != 0) {
          mempool.setSanityCheck(1.0 / ratio);
      }
      fCheckBlockIndex = gArgs.GetBoolArg("-checkblockindex", chainparams.DefaultConsistencyChecks());
      fCheckpointsEnabled = gArgs.GetBoolArg("-checkpoints", DEFAULT_CHECKPOINTS_ENABLED);
  
      hashAssumeValid = uint256S(gArgs.GetArg("-assumevalid", chainparams.GetConsensus().defaultAssumeValid.GetHex()));
      if (!hashAssumeValid.IsNull())
          LogPrintf("Assuming ancestors of block %s have valid signatures.\n", hashAssumeValid.GetHex());
      else
          LogPrintf("Validating signatures for all blocks.\n");
  
      if (gArgs.IsArgSet("-minimumchainwork")) {
          const std::string minChainWorkStr = gArgs.GetArg("-minimumchainwork", "");
          if (!IsHexNumber(minChainWorkStr)) {
              return InitError(strprintf("Invalid non-hex (%s) minimum chain work value specified", minChainWorkStr));
          }
          nMinimumChainWork = UintToArith256(uint256S(minChainWorkStr));
      } else {
          nMinimumChainWork = UintToArith256(chainparams.GetConsensus().nMinimumChainWork);
      }
      LogPrintf("Setting nMinimumChainWork=%s\n", nMinimumChainWork.GetHex());
      if (nMinimumChainWork < UintToArith256(chainparams.GetConsensus().nMinimumChainWork)) {
          LogPrintf("Warning: nMinimumChainWork set below default value of %s\n", chainparams.GetConsensus().nMinimumChainWork.GetHex());
      }
  
      // mempool limits
      int64_t nMempoolSizeMax = gArgs.GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000;
      int64_t nMempoolSizeMin = gArgs.GetArg("-limitdescendantsize", DEFAULT_DESCENDANT_SIZE_LIMIT) * 1000 * 40;
      if (nMempoolSizeMax < 0 || nMempoolSizeMax < nMempoolSizeMin)
          return InitError(strprintf(_("-maxmempool must be at least %d MB"), std::ceil(nMempoolSizeMin / 1000000.0)));
      // incremental relay fee sets the minimum feerate increase necessary for BIP 125 replacement in the mempool
      // and the amount the mempool min fee increases above the feerate of txs evicted due to mempool limiting.
      if (gArgs.IsArgSet("-incrementalrelayfee"))
      {
          CAmount n = 0;
          if (!ParseMoney(gArgs.GetArg("-incrementalrelayfee", ""), n))
              return InitError(AmountErrMsg("incrementalrelayfee", gArgs.GetArg("-incrementalrelayfee", "")));
          incrementalRelayFee = CFeeRate(n);
      }
  
      // -par=0 means autodetect, but nScriptCheckThreads==0 means no concurrency
      nScriptCheckThreads = gArgs.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;
  
      // block pruning; get the amount of disk space (in MiB) to allot for block & undo files
      int64_t nPruneArg = 0; // Blocknet does not support pruning at this time
      if (nPruneArg < 0) {
          return InitError(_("Prune cannot be configured with a negative value."));
      }
      nPruneTarget = (uint64_t) nPruneArg * 1024 * 1024;
      if (nPruneArg == 1) {  // manual pruning: -prune=1
          LogPrintf("Block pruning enabled.  Use RPC call pruneblockchain(height) to manually prune block and undo files.\n");
          nPruneTarget = std::numeric_limits<uint64_t>::max();
          fPruneMode = true;
      } else if (nPruneTarget) {
          if (nPruneTarget < MIN_DISK_SPACE_FOR_BLOCK_FILES) {
              return InitError(strprintf(_("Prune configured below the minimum of %d MiB.  Please use a higher number."), MIN_DISK_SPACE_FOR_BLOCK_FILES / 1024 / 1024));
          }
          LogPrintf("Prune configured to target %u MiB on disk for block and undo files.\n", nPruneTarget / 1024 / 1024);
          fPruneMode = true;
      }
  
      nConnectTimeout = gArgs.GetArg("-timeout", DEFAULT_CONNECT_TIMEOUT);
      if (nConnectTimeout <= 0) {
          nConnectTimeout = DEFAULT_CONNECT_TIMEOUT;
      }
  
      peer_connect_timeout = gArgs.GetArg("-peertimeout", DEFAULT_PEER_CONNECT_TIMEOUT);
      if (peer_connect_timeout <= 0) {
          return InitError("peertimeout cannot be configured with a negative value.");
      }
  
      if (gArgs.IsArgSet("-minrelaytxfee")) {
          CAmount n = 0;
          if (!ParseMoney(gArgs.GetArg("-minrelaytxfee", ""), n)) {
              return InitError(AmountErrMsg("minrelaytxfee", gArgs.GetArg("-minrelaytxfee", "")));
          }
          // High fee check is done afterward in WalletParameterInteraction()
          ::minRelayTxFee = CFeeRate(n);
      } else if (incrementalRelayFee > ::minRelayTxFee) {
          // Allow only setting incrementalRelayFee to control both
          ::minRelayTxFee = incrementalRelayFee;
          LogPrintf("Increasing minrelaytxfee to %s to match incrementalrelayfee\n",::minRelayTxFee.ToString());
      }
  
      // Sanity check argument for min fee for including tx in block
      // TODO: Harmonize which arguments need sanity checking and where that happens
      if (gArgs.IsArgSet("-blockmintxfee"))
      {
          CAmount n = 0;
          if (!ParseMoney(gArgs.GetArg("-blockmintxfee", ""), n))
              return InitError(AmountErrMsg("blockmintxfee", gArgs.GetArg("-blockmintxfee", "")));
      }
  
      // Feerate used to define dust.  Shouldn't be changed lightly as old
      // implementations may inadvertently create non-standard transactions
      if (gArgs.IsArgSet("-dustrelayfee"))
      {
          CAmount n = 0;
          if (!ParseMoney(gArgs.GetArg("-dustrelayfee", ""), n))
              return InitError(AmountErrMsg("dustrelayfee", gArgs.GetArg("-dustrelayfee", "")));
          dustRelayFee = CFeeRate(n);
      }
  
      // This is required by both the wallet and node
      if (gArgs.IsArgSet("-maxtxfee"))
      {
          CAmount nMaxFee = 0;
          if (!ParseMoney(gArgs.GetArg("-maxtxfee", ""), nMaxFee))
              return InitError(AmountErrMsg("maxtxfee", gArgs.GetArg("-maxtxfee", "")));
          if (nMaxFee > HIGH_MAX_TX_FEE)
              InitWarning(_("-maxtxfee is set very high! Fees this large could be paid on a single transaction."));
          maxTxFee = nMaxFee;
          if (CFeeRate(maxTxFee, 1000) < ::minRelayTxFee)
          {
              return InitError(strprintf(_("Invalid amount for -maxtxfee=<amount>: '%s' (must be at least the minrelay fee of %s to prevent stuck transactions)"),
                                         gArgs.GetArg("-maxtxfee", ""), ::minRelayTxFee.ToString()));
          }
      }
  
      fRequireStandard = !gArgs.GetBoolArg("-acceptnonstdtxn", !chainparams.RequireStandard());
      if (chainparams.RequireStandard() && !fRequireStandard)
          return InitError(strprintf("acceptnonstdtxn is not currently supported for %s chain", chainparams.NetworkIDString()));
      nBytesPerSigOp = gArgs.GetArg("-bytespersigop", nBytesPerSigOp);
  
      if (!g_wallet_init_interface.ParameterInteraction()) return false;
  
      fIsBareMultisigStd = gArgs.GetBoolArg("-permitbaremultisig", DEFAULT_PERMIT_BAREMULTISIG);
      fAcceptDatacarrier = gArgs.GetBoolArg("-datacarrier", DEFAULT_ACCEPT_DATACARRIER);
      nMaxDatacarrierBytes = gArgs.GetArg("-datacarriersize", nMaxDatacarrierBytes);
  
      // Option to startup with mocktime set (used for regression testing):
      SetMockTime(gArgs.GetArg("-mocktime", 0)); // SetMockTime(0) is a no-op
  
      if (gArgs.GetBoolArg("-peerbloomfilters", DEFAULT_PEERBLOOMFILTERS))
          nLocalServices = ServiceFlags(nLocalServices | NODE_BLOOM);
  
      if (gArgs.GetArg("-rpcserialversion", DEFAULT_RPC_SERIALIZE_VERSION) < 0)
          return InitError("rpcserialversion must be non-negative.");
  
      if (gArgs.GetArg("-rpcserialversion", DEFAULT_RPC_SERIALIZE_VERSION) > 1)
          return InitError("unknown rpcserialversion requested.");
  
      nMaxTipAge = gArgs.GetArg("-maxtipage", DEFAULT_MAX_TIP_AGE);
  
      fEnableReplacement = gArgs.GetBoolArg("-mempoolreplacement", DEFAULT_ENABLE_REPLACEMENT);
      if ((!fEnableReplacement) && gArgs.IsArgSet("-mempoolreplacement")) {
          // Minimal effort at forwards compatibility
          std::string strReplacementModeList = gArgs.GetArg("-mempoolreplacement", "");  // default is impossible
          std::vector<std::string> vstrReplacementModes;
          boost::split(vstrReplacementModes, strReplacementModeList, boost::is_any_of(","));
          fEnableReplacement = (std::find(vstrReplacementModes.begin(), vstrReplacementModes.end(), "fee") != vstrReplacementModes.end());
      }
  
      return true;
  }
  
  static bool LockDataDirectory(bool probeOnly)
  {
      // Make sure only a single Bitcoin process is using the data directory.
      fs::path datadir = GetDataDir();
      if (!DirIsWritable(datadir)) {
          return InitError(strprintf(_("Cannot write to data directory '%s'; check permissions."), datadir.string()));
      }
      if (!LockDirectory(datadir, ".lock", probeOnly)) {
          return InitError(strprintf(_("Cannot obtain a lock on data directory %s. %s is probably already running."), datadir.string(), _(PACKAGE_NAME)));
      }
      return true;
  }
  
  bool AppInitSanityChecks()
  {
      // ********************************************************* Step 4: sanity checks
  
      // Initialize elliptic curve code
      std::string sha256_algo = SHA256AutoDetect();
      LogPrintf("Using the '%s' SHA256 implementation\n", sha256_algo);
      RandomInit();
      ECC_Start();
      globalVerifyHandle.reset(new ECCVerifyHandle());
  
      // Sanity check
      if (!InitSanityCheck())
          return InitError(strprintf(_("Initialization sanity check failed. %s is shutting down."), _(PACKAGE_NAME)));
  
      // Probe the data directory lock to give an early error message, if possible
      // We cannot hold the data directory lock here, as the forking for daemon() hasn't yet happened,
      // and a fork will cause weird behavior to it.
      return LockDataDirectory(true);
  }
  
  bool AppInitLockDataDirectory()
  {
      // After daemonization get the data directory lock again and hold on to it until exit
      // This creates a slight window for a race condition to happen, however this condition is harmless: it
      // will at most make us exit without printing a message to console.
      if (!LockDataDirectory(false)) {
          // Detailed error printed inside LockDataDirectory
          return false;
      }
      return true;
  }
  
  bool AppInitMain(InitInterfaces& interfaces)
  {
      const CChainParams& chainparams = Params();
      // ********************************************************* Step 4a: application initialization
      if (!CreatePidFile()) {
          // Detailed error printed inside CreatePidFile().
          return false;
      }
      if (LogInstance().m_print_to_file) {
          if (gArgs.GetBoolArg("-shrinkdebugfile", LogInstance().DefaultShrinkDebugFile())) {
              // Do this first since it both loads a bunch of debug.log into memory,
              // and because this needs to happen before any other debug.log printing
              LogInstance().ShrinkDebugFile();
          }
          if (!LogInstance().OpenDebugLog()) {
              return InitError(strprintf("Could not open debug log file %s",
                  LogInstance().m_file_path.string()));
          }
      }
  
      if (!LogInstance().m_log_timestamps)
          LogPrintf("Startup time: %s\n", FormatISO8601DateTime(GetTime()));
      LogPrintf("Default data directory %s\n", GetDefaultDataDir().string());
      LogPrintf("Using data directory %s\n", GetDataDir().string());
  
      // Blocknet create default conf
      auto p = GetConfigFile(BITCOIN_CONF_FILENAME);
      if (!fs::exists(p)) {
          fsbridge::ofstream configFile(p, std::ios_base::app);
          if (configFile.good())
              configFile.close();
          else
              LogPrintf("Unable to create default conf file: %s\n", p.string());
      }
  
      // Only log conf file usage message if conf file actually exists.
      fs::path config_file_path = GetConfigFile(gArgs.GetArg("-conf", BITCOIN_CONF_FILENAME));
      if (fs::exists(config_file_path)) {
          LogPrintf("Config file: %s\n", config_file_path.string());
      } else if (gArgs.IsArgSet("-conf")) {
          // Warn if no conf file exists at path provided by user
          InitWarning(strprintf(_("The specified config file %s does not exist\n"), config_file_path.string()));
      } else {
          // Not categorizing as "Warning" because it's the default behavior
          LogPrintf("Config file: %s (not found, skipping)\n", config_file_path.string());
      }
  
      LogPrintf("Using at most %i automatic connections (%i file descriptors available)\n", nMaxConnections, nFD);
  
      // Warn about relative -datadir path.
      if (gArgs.IsArgSet("-datadir") && !fs::path(gArgs.GetArg("-datadir", "")).is_absolute()) {
          LogPrintf("Warning: relative datadir option '%s' specified, which will be interpreted relative to the " /* Continued */
                    "current working directory '%s'. This is fragile, because if Scalaris is started in the future "
                    "from a different location, it will be unable to locate the current data files. There could "
                    "also be data loss if Scalaris is started while in a temporary directory.\n",
              gArgs.GetArg("-datadir", ""), fs::current_path().string());
      }
  
      InitSignatureCache();
      InitScriptExecutionCache();
  
      LogPrintf("Using %u threads for script verification\n", nScriptCheckThreads);
      if (nScriptCheckThreads) {
          for (int i=0; i<nScriptCheckThreads-1; i++)
              threadGroup.create_thread(&ThreadScriptCheck);
      }
  
      // Start the lightweight task scheduler thread
      CScheduler::Function serviceLoop = std::bind(&CScheduler::serviceQueue, &scheduler);
      threadGroup.create_thread(std::bind(&TraceThread<CScheduler::Function>, "scheduler", serviceLoop));
  
      GetMainSignals().RegisterBackgroundSignalScheduler(scheduler);
      GetMainSignals().RegisterWithMempoolSignals(mempool);
  
      // Create client interfaces for wallets that are supposed to be loaded
      // according to -wallet and -disablewallet options. This only constructs
      // the interfaces, it doesn't load wallet data. Wallets actually get loaded
      // when load() and start() interface methods are called below.
      g_wallet_init_interface.Construct(interfaces);
  
      /* Register RPC commands regardless of -server setting so they will be
       * available in the GUI RPC console even if external calls are disabled.
       */
      RegisterAllCoreRPCCommands(tableRPC);
      for (const auto& client : interfaces.chain_clients) {
          client->registerRpcs();
      }
      g_rpc_interfaces = &interfaces;
  #if ENABLE_ZMQ
      RegisterZMQRPCCommands(tableRPC);
  #endif
  
      /* 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 (gArgs.GetBoolArg("-server", false))
      {
          uiInterface.InitMessage_connect(SetRPCWarmupStatus);
          if (!AppInitServers())
              return InitError(_("Unable to start HTTP server. See debug log for details."));
      }
  
      // ********************************************************* Step 5: verify wallet database integrity
      for (const auto& client : interfaces.chain_clients) {
          if (!client->verify()) {
              return false;
          }
      }
  
      // ********************************************************* Step 6: network initialization
      // Note that we absolutely cannot open any actual connections
      // until the very end ("start node") as the UTXO/block state
      // is not yet setup and may end up being set up twice if we
      // need to reindex later.
  
      assert(!g_banman);
      g_banman = MakeUnique<BanMan>(GetDataDir() / "banlist.dat", &uiInterface, gArgs.GetArg("-bantime", DEFAULT_MISBEHAVING_BANTIME));
      assert(!g_connman);
      g_connman = std::unique_ptr<CConnman>(new CConnman(GetRand(std::numeric_limits<uint64_t>::max()), GetRand(std::numeric_limits<uint64_t>::max())));
  
      peerLogic.reset(new PeerLogicValidation(g_connman.get(), g_banman.get(), scheduler, gArgs.GetBoolArg("-enablebip61", DEFAULT_ENABLE_BIP61)));
      RegisterValidationInterface(peerLogic.get());
  
      // sanitize comments per BIP-0014, format user agent and check total size
      std::vector<std::string> uacomments;
      for (const std::string& cmt : gArgs.GetArgs("-uacomment")) {
          if (cmt != SanitizeString(cmt, SAFE_CHARS_UA_COMMENT))
              return InitError(strprintf(_("User Agent comment (%s) contains unsafe characters."), cmt));
          uacomments.push_back(cmt);
      }
      strSubVersion = FormatSubVersion(CLIENT_NAME, CLIENT_VERSION, uacomments);
      if (strSubVersion.size() > MAX_SUBVERSION_LENGTH) {
          return InitError(strprintf(_("Total length of network version string (%i) exceeds maximum length (%i). Reduce the number or size of uacomments."),
              strSubVersion.size(), MAX_SUBVERSION_LENGTH));
      }
  
      if (gArgs.IsArgSet("-onlynet")) {
          std::set<enum Network> nets;
          for (const std::string& snet : gArgs.GetArgs("-onlynet")) {
              enum Network net = ParseNetwork(snet);
              if (net == NET_UNROUTABLE)
                  return InitError(strprintf(_("Unknown network specified in -onlynet: '%s'"), snet));
              nets.insert(net);
          }
          for (int n = 0; n < NET_MAX; n++) {
              enum Network net = (enum Network)n;
              if (!nets.count(net))
                  SetReachable(net, false);
          }
      }
  
      // Check for host lookup allowed before parsing any network related parameters
      fNameLookup = gArgs.GetBoolArg("-dns", DEFAULT_NAME_LOOKUP);
  
      bool proxyRandomize = gArgs.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 = gArgs.GetArg("-proxy", "");
      SetReachable(NET_ONION, false);
      if (proxyArg != "" && proxyArg != "0") {
          CService proxyAddr;
          if (!Lookup(proxyArg.c_str(), proxyAddr, 9050, fNameLookup)) {
              return InitError(strprintf(_("Invalid -proxy address or hostname: '%s'"), proxyArg));
          }
  
          proxyType addrProxy = proxyType(proxyAddr, proxyRandomize);
          if (!addrProxy.IsValid())
              return InitError(strprintf(_("Invalid -proxy address or hostname: '%s'"), proxyArg));
  
          SetProxy(NET_IPV4, addrProxy);
          SetProxy(NET_IPV6, addrProxy);
          SetProxy(NET_ONION, addrProxy);
          SetNameProxy(addrProxy);
          SetReachable(NET_ONION, true); // 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 = gArgs.GetArg("-onion", "");
      if (onionArg != "") {
          if (onionArg == "0") { // Handle -noonion/-onion=0
              SetReachable(NET_ONION, false);
          } else {
              CService onionProxy;
              if (!Lookup(onionArg.c_str(), onionProxy, 9050, fNameLookup)) {
                  return InitError(strprintf(_("Invalid -onion address or hostname: '%s'"), onionArg));
              }
              proxyType addrOnion = proxyType(onionProxy, proxyRandomize);
              if (!addrOnion.IsValid())
                  return InitError(strprintf(_("Invalid -onion address or hostname: '%s'"), onionArg));
              SetProxy(NET_ONION, addrOnion);
              SetReachable(NET_ONION, true);
          }
      }
  
      // see Step 2: parameter interactions for more information about these
      fListen = gArgs.GetBoolArg("-listen", DEFAULT_LISTEN);
      fDiscover = gArgs.GetBoolArg("-discover", true);
      fRelayTxes = !gArgs.GetBoolArg("-blocksonly", DEFAULT_BLOCKSONLY);
  
      for (const std::string& strAddr : gArgs.GetArgs("-externalip")) {
          CService addrLocal;
          if (Lookup(strAddr.c_str(), addrLocal, GetListenPort(), fNameLookup) && addrLocal.IsValid())
              AddLocal(addrLocal, LOCAL_MANUAL);
          else
              return InitError(ResolveErrMsg("externalip", strAddr));
      }
  
  #if ENABLE_ZMQ
      g_zmq_notification_interface = CZMQNotificationInterface::Create();
  
      if (g_zmq_notification_interface) {
          RegisterValidationInterface(g_zmq_notification_interface);
      }
  #endif
      uint64_t nMaxOutboundLimit = 0; //unlimited unless -maxuploadtarget is set
      uint64_t nMaxOutboundTimeframe = MAX_UPLOAD_TIMEFRAME;
  
      if (gArgs.IsArgSet("-maxuploadtarget")) {
          nMaxOutboundLimit = gArgs.GetArg("-maxuploadtarget", DEFAULT_MAX_UPLOAD_TARGET)*1024*1024;
      }
  
      // ********************************************************* Step 7: load block chain
  
      // Load coin validator
      CoinValidator::instance().LoadStatic();
  
      fReindex = gArgs.GetBoolArg("-reindex", false);
      bool fReindexChainState = gArgs.GetBoolArg("-reindex-chainstate", false);
  
      // cache size calculations
      int64_t nTotalCache = (gArgs.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 = std::min(nTotalCache / 6, nMaxBlockDBCache << 20);
      nTotalCache -= nBlockTreeDBCache;
      int64_t nTxIndexCache = std::min(nTotalCache / 2, nMaxTxIndexCache << 20); // Blocknet PoS requires txindex
      nTotalCache -= nTxIndexCache;
      int64_t nCoinDBCache = std::min(nTotalCache / 2, (nTotalCache / 4) + (1 << 23)); // use 25%-50% of the remainder for disk cache
      nCoinDBCache = std::min(nCoinDBCache, nMaxCoinsDBCache << 20); // cap total coins db cache
      nTotalCache -= nCoinDBCache;
      int64_t nGovDBCache = std::min(nTotalCache / 6, nMaxGovDBCache << 20); // cap total gov db cache
      nTotalCache -= nGovDBCache;
      nCoinCacheUsage = nTotalCache; // the rest goes to in-memory cache
      int64_t nMempoolSizeMax = gArgs.GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000;
      LogPrintf("Cache configuration:\n");
      LogPrintf("* Using %.1f MiB for block index database\n", nBlockTreeDBCache * (1.0 / 1024 / 1024));
      // Blocknet PoS requires txindex
          LogPrintf("* Using %.1f MiB for transaction index database\n", nTxIndexCache * (1.0 / 1024 / 1024));
      LogPrintf("* Using %.1f MiB for chain state database\n", nCoinDBCache * (1.0 / 1024 / 1024));
      LogPrintf("* Using %.1f MiB for in-memory UTXO set (plus up to %.1f MiB of unused mempool space)\n", nCoinCacheUsage * (1.0 / 1024 / 1024), nMempoolSizeMax * (1.0 / 1024 / 1024));
      LogPrintf("* Using %.1f MiB for governance database\n", nGovDBCache * (1.0 / 1024 / 1024));
  
      // Governance setup
      RegisterValidationInterface(&gov::Governance::instance(nGovDBCache));
  
      // Blocknet PoS requires txindex
      g_txindex = MakeUnique<TxIndex>(nTxIndexCache, false, fReindex);
  
      bool fLoaded = false;
      while (!fLoaded && !ShutdownRequested()) {
          bool fReset = fReindex;
          std::string strLoadError;
  
          uiInterface.InitMessage(_("Loading block index..."));
  
          do {
              const int64_t load_block_index_start_time = GetTimeMillis();
              bool is_coinsview_empty;
              try {
                  LOCK(cs_main);
                  UnloadBlockIndex();
                  pcoinsTip.reset();
                  pcoinsdbview.reset();
                  pcoinscatcher.reset();
                  // new CBlockTreeDB tries to delete the existing file, which
                  // fails if it's still open from the previous loop. Close it first:
                  pblocktree.reset();
                  pblocktree.reset(new CBlockTreeDB(nBlockTreeDBCache, false, fReset));
  
                  if (fReset) {
                      pblocktree->WriteReindexing(true);
                      //If we're reindexing in prune mode, wipe away unusable block files and all undo data files
                      if (fPruneMode)
                          CleanupBlockRevFiles();
                  }
  
                  if (ShutdownRequested()) break;
  
                  // LoadBlockIndex will load fHavePruned if we've ever removed a
                  // block file from disk.
                  // Note that it also sets fReindex based on the disk flag!
                  // From here on out fReindex and fReset mean something different!
                  if (!LoadBlockIndex(chainparams)) {
                      strLoadError = _("Error loading block database");
                      break;
                  }
  
                  // If the loaded chain has a wrong genesis, bail out immediately
                  // (we're likely using a testnet datadir, or the other way around).
                  if (!mapBlockIndex.empty() && !LookupBlockIndex(chainparams.GetConsensus().hashGenesisBlock)) {
                      return InitError(_("Incorrect or no genesis block found. Wrong datadir for network?"));
                  }
  
                  // Check for changed -prune state.  What we are concerned about is a user who has pruned blocks
                  // in the past, but is now trying to run unpruned.
                  if (fHavePruned && !fPruneMode) {
                      strLoadError = _("You need to rebuild the database using -reindex to go back to unpruned mode.  This will redownload the entire blockchain");
                      break;
                  }
  
                  // At this point blocktree args are consistent with what's on disk.
                  // If we're not mid-reindex (based on disk + args), add a genesis block on disk
                  // (otherwise we use the one already on disk).
                  // This is called again in ThreadImport after the reindex completes.
                  if (!fReindex && !LoadGenesisBlock(chainparams)) {
                      strLoadError = _("Error initializing block database");
                      break;
                  }
  
                  // At this point we're either in reindex or we've loaded a useful
                  // block tree into mapBlockIndex!
  
                  pcoinsdbview.reset(new CCoinsViewDB(nCoinDBCache, false, fReset || fReindexChainState));
                  pcoinscatcher.reset(new CCoinsViewErrorCatcher(pcoinsdbview.get()));
  
                  // If necessary, upgrade from older database format.
                  // This is a no-op if we cleared the coinsviewdb with -reindex or -reindex-chainstate
                  if (!pcoinsdbview->Upgrade()) {
                      strLoadError = _("Error upgrading chainstate database");
                      break;
                  }
  
                  // ReplayBlocks is a no-op if we cleared the coinsviewdb with -reindex or -reindex-chainstate
                  if (!ReplayBlocks(chainparams, pcoinsdbview.get())) {
                      strLoadError = _("Unable to replay blocks. You will need to rebuild the database using -reindex-chainstate.");
                      break;
                  }
  
                  // The on-disk coinsdb is now in a good state, create the cache
                  pcoinsTip.reset(new CCoinsViewCache(pcoinscatcher.get()));
  
                  is_coinsview_empty = fReset || fReindexChainState || pcoinsTip->GetBestBlock().IsNull();
                  if (!is_coinsview_empty) {
                      // LoadChainTip sets chainActive based on pcoinsTip's best block
                      if (!LoadChainTip(chainparams)) {
                          strLoadError = _("Error initializing block database");
                          break;
                      }
                      assert(chainActive.Tip() != nullptr);
                  }
              } catch (const std::exception& e) {
                  LogPrintf("%s\n", e.what());
                  strLoadError = _("Error opening block database");
                  break;
              }
  
              // Blocknet PoS load indexer
              g_txindex->Start();
  
              if (!fReset) {
                  // Note that RewindBlockIndex MUST run even if we're about to -reindex-chainstate.
                  // It both disconnects blocks based on chainActive, and drops block data in
                  // mapBlockIndex based on lack of available witness data.
                  uiInterface.InitMessage(_("Rewinding blocks..."));
                  if (!RewindBlockIndex(chainparams)) {
                      strLoadError = _("Unable to rewind the database to a pre-fork state. You will need to redownload the blockchain");
                      break;
                  }
              }
  
              try {
                  LOCK(cs_main);
                  if (!is_coinsview_empty) {
                      uiInterface.InitMessage(_("Verifying blocks..."));
                      if (fHavePruned && gArgs.GetArg("-checkblocks", DEFAULT_CHECKBLOCKS) > MIN_BLOCKS_TO_KEEP) {
                          LogPrintf("Prune: pruned datadir may not have more than %d blocks; only checking available blocks\n",
                              MIN_BLOCKS_TO_KEEP);
                      }
  
                      CBlockIndex* tip = chainActive.Tip();
                      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;
                      }
  
                      if (!CVerifyDB().VerifyDB(chainparams, pcoinsdbview.get(), gArgs.GetArg("-checklevel", DEFAULT_CHECKLEVEL),
                                    gArgs.GetArg("-checkblocks", DEFAULT_CHECKBLOCKS))) {
                          strLoadError = _("Corrupted block database detected");
                          break;
                      }
                  }
              } catch (const std::exception& e) {
                  LogPrintf("%s\n", e.what());
                  strLoadError = _("Error opening block database");
                  break;
              }
  
              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.ThreadSafeQuestion(
                      strLoadError + ".\n\n" + _("Do you want to rebuild the block database now?"),
                      strLoadError + ".\nPlease restart with -reindex or -reindex-chainstate to recover.",
                      "", CClientUIInterface::MSG_ERROR | CClientUIInterface::BTN_ABORT);
                  if (fRet) {
                      fReindex = true;
                      AbortShutdown();
                  } else {
                      LogPrintf("Aborted block database rebuild. Exiting.\n");
                      return false;
                  }
              } else {
                  return InitError(strLoadError);
              }
          }
      }
  
      // As LoadBlockIndex can take several minutes, it's possible the user
      // requested to kill the GUI during the last operation. If so, exit.
      // As the program has not fully started yet, Shutdown() is possibly overkill.
      if (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())
          ::feeEstimator.Read(est_filein);
      fFeeEstimatesInitialized = true;
  
      // ********************************************************* Step 8: start indexers
      // Blocknet PoS requires indexer to be started before chain load
  
      // ********************************************************* Step 9: load wallet
      for (const auto& client : interfaces.chain_clients) {
          if (!client->load()) {
              return false;
          }
      }
  
      // ********************************************************* Step 10: data directory maintenance
  
      // if pruning, unset the service bit and perform the initial blockstore prune
      // after any wallet rescanning has taken place.
      if (fPruneMode) {
          LogPrintf("Unsetting NODE_NETWORK on prune mode\n");
          nLocalServices = ServiceFlags(nLocalServices & ~NODE_NETWORK);
          if (!fReindex) {
              uiInterface.InitMessage(_("Pruning blockstore..."));
              PruneAndFlush();
          }
      }
  
      if (chainparams.GetConsensus().vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout != 0) {
          // Only advertise witness capabilities if they have a reasonable start time.
          // This allows us to have the code merged without a defined softfork, by setting its
          // end time to 0.
          // Note that setting NODE_WITNESS is never required: the only downside from not
          // doing so is that after activation, no upgraded nodes will fetch from you.
          nLocalServices = ServiceFlags(nLocalServices | NODE_WITNESS);
      }
  
      // ********************************************************* Step 11: import blocks
  
      if (!CheckDiskSpace(/* additional_bytes */ 0, /* blocks_dir */ false)) {
          InitError(strprintf(_("Error: Disk space is low for %s"), GetDataDir()));
          return false;
      }
      if (!CheckDiskSpace(/* additional_bytes */ 0, /* blocks_dir */ true)) {
          InitError(strprintf(_("Error: Disk space is low for %s"), GetBlocksDir()));
          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 (gArgs.IsArgSet("-blocknotify"))
          uiInterface.NotifyBlockTip_connect(BlockNotifyCallback);
  
      std::vector<fs::path> vImportFiles;
      for (const std::string& strFile : gArgs.GetArgs("-loadblock")) {
          vImportFiles.push_back(strFile);
      }
  
      threadGroup.create_thread(std::bind(&ThreadImport, vImportFiles));
  
      // Wait for txindex
      {
          WAIT_LOCK(g_wait_index_mutex, lock);
          while (!fTxIndexReady && !ShutdownRequested()) {
              g_wait_index_cv.wait_for(lock, std::chrono::milliseconds(500));
          }
      }
  
      // Wait for genesis block to be processed
      {
          WAIT_LOCK(g_genesis_wait_mutex, lock);
          // We previously could hang here if StartShutdown() is called prior to
          // ThreadImport getting started, so instead we just wait on a timer to
          // check ShutdownRequested() regularly.
          while (!fHaveGenesis && !ShutdownRequested()) {
              g_genesis_wait_cv.wait_for(lock, std::chrono::milliseconds(500));
          }
          uiInterface.NotifyBlockTip_disconnect(BlockNotifyGenesisWait);
      }
  
      if (ShutdownRequested()) {
          return false;
      }
  
      // ********************************************************* Step 12: start node
  
      // Load governance data from chain data
      uiInterface.InitMessage(_("Loading Governance data..."));
      std::string failReason;
      if (!gov::Governance::instance().loadGovernanceData(chainActive, cs_main, Params().GetConsensus(), failReason)) {
          LogPrintf("ERROR: Failed to load Governance data: %s\n", failReason);
          uiInterface.InitMessage(_("Failed to load Governance data. If the problem continues please perform a chain reindex. See debug.log for more details"));
          return false;
      }
  
      // Signal service node list support
      nLocalServices = ServiceFlags(nLocalServices | NODE_SNODE_LIST);
  
      int chain_active_height;
  
      //// debug print
      {
          LOCK(cs_main);
          LogPrintf("mapBlockIndex.size() = %u\n", mapBlockIndex.size());
          chain_active_height = chainActive.Height();
      }
      LogPrintf("nBestHeight = %d\n", chain_active_height);
  
      if (gArgs.GetBoolArg("-listenonion", DEFAULT_LISTEN_ONION))
          StartTorControl();
  
      Discover();
  
      // Map ports with UPnP
      if (gArgs.GetBoolArg("-upnp", DEFAULT_UPNP)) {
          StartMapPort();
      }
  
      CConnman::Options connOptions;
      connOptions.nLocalServices = nLocalServices;
      connOptions.nMaxConnections = nMaxConnections;
      connOptions.nMaxOutbound = std::min(MAX_OUTBOUND_CONNECTIONS, connOptions.nMaxConnections);
      connOptions.nMaxAddnode = MAX_ADDNODE_CONNECTIONS;
      connOptions.nMaxFeeler = 1;
      connOptions.nBestHeight = chain_active_height;
      connOptions.uiInterface = &uiInterface;
      connOptions.m_banman = g_banman.get();
      connOptions.m_msgproc = peerLogic.get();
      connOptions.nSendBufferMaxSize = 1000*gArgs.GetArg("-maxsendbuffer", DEFAULT_MAXSENDBUFFER);
      connOptions.nReceiveFloodSize = 1000*gArgs.GetArg("-maxreceivebuffer", DEFAULT_MAXRECEIVEBUFFER);
      connOptions.m_added_nodes = gArgs.GetArgs("-addnode");
  
      connOptions.nMaxOutboundTimeframe = nMaxOutboundTimeframe;
      connOptions.nMaxOutboundLimit = nMaxOutboundLimit;
      connOptions.m_peer_connect_timeout = peer_connect_timeout;
  
      for (const std::string& strBind : gArgs.GetArgs("-bind")) {
          CService addrBind;
          if (!Lookup(strBind.c_str(), addrBind, GetListenPort(), false)) {
              return InitError(ResolveErrMsg("bind", strBind));
          }
          connOptions.vBinds.push_back(addrBind);
      }
      for (const std::string& strBind : gArgs.GetArgs("-whitebind")) {
          CService addrBind;
          if (!Lookup(strBind.c_str(), addrBind, 0, false)) {
              return InitError(ResolveErrMsg("whitebind", strBind));
          }
          if (addrBind.GetPort() == 0) {
              return InitError(strprintf(_("Need to specify a port with -whitebind: '%s'"), strBind));
          }
          connOptions.vWhiteBinds.push_back(addrBind);
      }
  
      for (const auto& net : gArgs.GetArgs("-whitelist")) {
          CSubNet subnet;
          LookupSubNet(net.c_str(), subnet);
          if (!subnet.IsValid())
              return InitError(strprintf(_("Invalid netmask specified in -whitelist: '%s'"), net));
          connOptions.vWhitelistedRange.push_back(subnet);
      }
  
      connOptions.vSeedNodes = gArgs.GetArgs("-seednode");
  
      // Initiate outbound connections unless connect=0
      connOptions.m_use_addrman_outgoing = !gArgs.IsArgSet("-connect");
      if (!connOptions.m_use_addrman_outgoing) {
          const auto connect = gArgs.GetArgs("-connect");
          if (connect.size() != 1 || connect[0] != "0") {
              connOptions.m_specified_outgoing = connect;
          }
      }
      if (!g_connman->Start(scheduler, connOptions)) {
          return false;
      }
  
  #ifdef ENABLE_WALLET
      // Start the staker
      if (gArgs.GetBoolArg("-staking", true))
          threadGroup.create_thread(&ThreadStakeMinter);
  #endif
  
      // ********************************************************* Step 13: finished
  
      SetRPCWarmupFinished();
  
      // ********************************************************* Start XBridge and XRouter
  #ifdef ENABLE_WALLET
      if (!ShutdownRequested()) {
          sn::ServiceNodeMgr & smgr = sn::ServiceNodeMgr::instance();
          std::set<sn::ServiceNodeConfigEntry> entries;
          if (!smgr.loadSnConfig(entries))
              LogPrint(BCLog::SNODE, "Failed to load service node entries from servicenode.conf\n");
  
          uiInterface.InitMessage(_("Starting xbridge service"));
          xbridge::App & xapp = xbridge::App::instance();
          xbridge::App::createConf(); // create config if it doesn't exist
          xapp.init(); // init xbridge
          xapp.start(); // start xbridge
  
          xrouter::App & xrapp = xrouter::App::instance();
          xrouter::App::createConf(GetDataDir(false)); // create config if it doesn't exist
          if (xrouter::App::isEnabled()) {
              uiInterface.InitMessage(_("Starting xrouter service"));
              if (!xrapp.init(GetDataDir(false))) // start xrouter
                  LogPrintf("XRouter failed to start, please check your configs\n");
              xrapp.start();
          }
  
          // If there's snode entries, proceed to register them
          if (!entries.empty()) {
              auto wallets = GetWallets();
              std::string failReason;
              for (const auto & snode : entries) {
                  bool haveAddr{false};
                  for (auto & w : wallets) {
                      if (w->HaveKey(boost::get<CKeyID>(snode.address))) {
                          haveAddr = true;
                          break;
                      }
                  }
                  if (haveAddr) {
                      if (!smgr.registerSn(snode, g_connman.get(), wallets, &failReason))
                          LogPrintf("Failed to register service node %s: %s\n", snode.alias, failReason);
                  } else if (!smgr.hasActiveSn())
                      LogPrintf("Failed to register service node %s because the collateral could not be found in the wallet.\n", snode.alias);
              }
              // If we are a servicenode that's active try and register with the network from cache
              if (smgr.hasActiveSn()) {
                  const auto & activesn = smgr.getActiveSn();
                  auto snode = smgr.getSn(activesn.key.GetPubKey());
                  // Try and load snode registration from disk only if snode wasn't recently registered above
                  // to avoid overwriting state.
                  if (snode.isNull() && !smgr.loadSnRegistrationFromDisk(snode))
                      LogPrintf("Service node auto-registration failed for %s\n", activesn.alias);
                  // Send service ping if snode is registered
                  if (!snode.isNull() && !smgr.sendPing(XROUTER_PROTOCOL_VERSION, xapp.myServicesJSON(), g_connman.get()))
                      LogPrintf("Service node ping failed after registration for %s\n", activesn.alias);
              }
          }
  
          // Servicenode validation interface
          RegisterValidationInterface(&smgr);
      }
  #endif
  
      // Clear v3 header index if chaintip is ahead of that protocol
      if (IsProtocolV05(chainActive.Tip()->GetBlockTime())) {
          LOCK(cs_main);
          mapHeaderIndex.clear();
      }
  
      uiInterface.InitMessage(_("Done loading"));
  
      for (const auto& client : interfaces.chain_clients) {
          client->start(scheduler);
      }
  
      scheduler.scheduleEvery([]{
          g_banman->DumpBanlist();
      }, DUMP_BANS_INTERVAL * 1000);
  
      return true;
  }
  