src/init.cpp

   1 // Copyright (c) 2009-2010 Satoshi Nakamoto
   2 // Copyright (c) 2009-2014 The Bitcoin Core developers
   3 // Distributed under the MIT software license, see the accompanying
   4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   5
   6 #if defined(HAVE_CONFIG_H)
   7 #include "config/bitcoin-config.h"
   8 #endif
   9
  10 #include "init.h"
  11
  12 #include "addrman.h"
  13 #include "amount.h"
  14 #include "chain.h"
  15 #include "chainparams.h"
  16 #include "checkpoints.h"
  17 #include "compat/sanity.h"
  18 #include "consensus/validation.h"
  19 #include "key.h"
  20 #include "main.h"
  21 #include "miner.h"
  22 #include "net.h"
  23 #include "policy/policy.h"
  24 #include "rpcserver.h"
  25 #include "script/standard.h"
  26 #include "scheduler.h"
  27 #include "txdb.h"
  28 #include "txmempool.h"
  29 #include "ui_interface.h"
  30 #include "util.h"
  31 #include "utilmoneystr.h"
  32 #include "utilstrencodings.h"
  33 #include "validationinterface.h"
  34 #ifdef ENABLE_WALLET
  35 #include "wallet/db.h"
  36 #include "wallet/wallet.h"
  37 #include "wallet/walletdb.h"
  38 #endif
  39
  40 #include <stdint.h>
  41 #include <stdio.h>
  42
  43 #ifndef WIN32
  44 #include <signal.h>
  45 #endif
  46
  47 #include <boost/algorithm/string/predicate.hpp>
  48 #include <boost/algorithm/string/replace.hpp>
  49 #include <boost/bind.hpp>
  50 #include <boost/filesystem.hpp>
  51 #include <boost/function.hpp>
  52 #include <boost/interprocess/sync/file_lock.hpp>
  53 #include <boost/thread.hpp>
  54 #include <openssl/crypto.h>
  55
  56 using namespace std;
  57
  58 #ifdef ENABLE_WALLET
  59 CWallet* pwalletMain = NULL;
  60 #endif
  61 bool fFeeEstimatesInitialized = false;
  62
  63 #ifdef WIN32
  64 // Win32 LevelDB doesn't use filedescriptors, and the ones used for
  65 // accessing block files don't count towards the fd_set size limit
  66 // anyway.
  67 #define MIN_CORE_FILEDESCRIPTORS 0
  68 #else
  69 #define MIN_CORE_FILEDESCRIPTORS 150
  70 #endif
  71
  72 /** Used to pass flags to the Bind() function */
  73 enum BindFlags {
  74     BF_NONE         = 0,
  75     BF_EXPLICIT     = (1U << 0),
  76     BF_REPORT_ERROR = (1U << 1),
  77     BF_WHITELIST    = (1U << 2),
  78 };
  79
  80 static const char* FEE_ESTIMATES_FILENAME="fee_estimates.dat";
  81 CClientUIInterface uiInterface; // Declared but not defined in ui_interface.h
  82
  83 //////////////////////////////////////////////////////////////////////////////
  84 //
  85 // Shutdown
  86 //
  87
  88 //
  89 // Thread management and startup/shutdown:
  90 //
  91 // The network-processing threads are all part of a thread group
  92 // created by AppInit() or the Qt main() function.
  93 //
  94 // A clean exit happens when StartShutdown() or the SIGTERM
  95 // signal handler sets fRequestShutdown, which triggers
  96 // the DetectShutdownThread(), which interrupts the main thread group.
  97 // DetectShutdownThread() then exits, which causes AppInit() to
  98 // continue (it .joins the shutdown thread).
  99 // Shutdown() is then
 100 // called to clean up database connections, and stop other
 101 // threads that should only be stopped after the main network-processing
 102 // threads have exited.
 103 //
 104 // Note that if running -daemon the parent process returns from AppInit2
 105 // before adding any threads to the threadGroup, so .join_all() returns
 106 // immediately and the parent exits from main().
 107 //
 108 // Shutdown for Qt is very similar, only it uses a QTimer to detect
 109 // fRequestShutdown getting set, and then does the normal Qt
 110 // shutdown thing.
 111 //
 112
 113 volatile bool fRequestShutdown = false;
 114
 115 void StartShutdown()
 116 {
 117     fRequestShutdown = true;
 118 }
 119 bool ShutdownRequested()
 120 {
 121     return fRequestShutdown;
 122 }
 123
 124 class CCoinsViewErrorCatcher : public CCoinsViewBacked
 125 {
 126 public:
 127     CCoinsViewErrorCatcher(CCoinsView* view) : CCoinsViewBacked(view) {}
 128     bool GetCoins(const uint256 &txid, CCoins &coins) const {
 129         try {
 130             return CCoinsViewBacked::GetCoins(txid, coins);
 131         } catch(const std::runtime_error& e) {
 132             uiInterface.ThreadSafeMessageBox(_("Error reading from database, shutting down."), "", CClientUIInterface::MSG_ERROR);
 133             LogPrintf("Error reading from database: %s\n", e.what());
 134             // Starting the shutdown sequence and returning false to the caller would be
 135             // interpreted as 'entry not found' (as opposed to unable to read data), and
 136             // could lead to invalid interpretation. Just exit immediately, as we can't
 137             // continue anyway, and all writes should be atomic.
 138             abort();
 139         }
 140     }
 141     // Writes do not need similar protection, as failure to write is handled by the caller.
 142 };
 143
 144 static CCoinsViewDB *pcoinsdbview = NULL;
 145 static CCoinsViewErrorCatcher *pcoinscatcher = NULL;
 146
 147 void Shutdown()
 148 {
 149     LogPrintf("%s: In progress...\n", __func__);
 150     static CCriticalSection cs_Shutdown;
 151     TRY_LOCK(cs_Shutdown, lockShutdown);
 152     if (!lockShutdown)
 153         return;
 154
 155     /// Note: Shutdown() must be able to handle cases in which AppInit2() failed part of the way,
 156     /// for example if the data directory was found to be locked.
 157     /// Be sure that anything that writes files or flushes caches only does this if the respective
 158     /// module was initialized.
 159     RenameThread("bitcoin-shutoff");
 160     mempool.AddTransactionsUpdated(1);
 161     StopRPCThreads();
 162 #ifdef ENABLE_WALLET
 163     if (pwalletMain)
 164         pwalletMain->Flush(false);
 165 #endif
 166     GenerateBitcoins(false, 0, Params());
 167     StopNode();
 168     UnregisterNodeSignals(GetNodeSignals());
 169
 170     if (fFeeEstimatesInitialized)
 171     {
 172         boost::filesystem::path est_path = GetDataDir() / FEE_ESTIMATES_FILENAME;
 173         CAutoFile est_fileout(fopen(est_path.string().c_str(), "wb"), SER_DISK, CLIENT_VERSION);
 174         if (!est_fileout.IsNull())
 175             mempool.WriteFeeEstimates(est_fileout);
 176         else
 177             LogPrintf("%s: Failed to write fee estimates to %s\n", __func__, est_path.string());
 178         fFeeEstimatesInitialized = false;
 179     }
 180
 181     {
 182         LOCK(cs_main);
 183         if (pcoinsTip != NULL) {
 184             FlushStateToDisk();
 185         }
 186         delete pcoinsTip;
 187         pcoinsTip = NULL;
 188         delete pcoinscatcher;
 189         pcoinscatcher = NULL;
 190         delete pcoinsdbview;
 191         pcoinsdbview = NULL;
 192         delete pblocktree;
 193         pblocktree = NULL;
 194     }
 195 #ifdef ENABLE_WALLET
 196     if (pwalletMain)
 197         pwalletMain->Flush(true);
 198 #endif
 199 #ifndef WIN32
 200     try {
 201         boost::filesystem::remove(GetPidFile());
 202     } catch (const boost::filesystem::filesystem_error& e) {
 203         LogPrintf("%s: Unable to remove pidfile: %s\n", __func__, e.what());
 204     }
 205 #endif
 206     UnregisterAllValidationInterfaces();
 207 #ifdef ENABLE_WALLET
 208     delete pwalletMain;
 209     pwalletMain = NULL;
 210 #endif
 211     ECC_Stop();
 212     LogPrintf("%s: done\n", __func__);
 213 }
 214
 215 /**
 216  * Signal handlers are very limited in what they are allowed to do, so:
 217  */
 218 void HandleSIGTERM(int)
 219 {
 220     fRequestShutdown = true;
 221 }
 222
 223 void HandleSIGHUP(int)
 224 {
 225     fReopenDebugLog = true;
 226 }
 227
 228 bool static InitError(const std::string &str)
 229 {
 230     uiInterface.ThreadSafeMessageBox(str, "", CClientUIInterface::MSG_ERROR);
 231     return false;
 232 }
 233
 234 bool static InitWarning(const std::string &str)
 235 {
 236     uiInterface.ThreadSafeMessageBox(str, "", CClientUIInterface::MSG_WARNING);
 237     return true;
 238 }
 239
 240 bool static Bind(const CService &addr, unsigned int flags) {
 241     if (!(flags & BF_EXPLICIT) && IsLimited(addr))
 242         return false;
 243     std::string strError;
 244     if (!BindListenPort(addr, strError, (flags & BF_WHITELIST) != 0)) {
 245         if (flags & BF_REPORT_ERROR)
 246             return InitError(strError);
 247         return false;
 248     }
 249     return true;
 250 }
 251
 252 void OnRPCStopped()
 253 {
 254     cvBlockChange.notify_all();
 255     LogPrint("rpc", "RPC stopped.\n");
 256 }
 257
 258 void OnRPCPreCommand(const CRPCCommand& cmd)
 259 {
 260     // Observe safe mode
 261     string strWarning = GetWarnings("rpc");
 262     if (strWarning != "" && !GetBoolArg("-disablesafemode", false) &&
 263         !cmd.okSafeMode)
 264         throw JSONRPCError(RPC_FORBIDDEN_BY_SAFE_MODE, string("Safe mode: ") + strWarning);
 265 }
 266
 267 std::string HelpMessage(HelpMessageMode mode)
 268 {
 269     const bool showDebug = GetBoolArg("-help-debug", false);
 270
 271     // When adding new options to the categories, please keep and ensure alphabetical ordering.
 272     // Do not translate _(...) -help-debug options, Many technical terms, and only a very small audience, so is unnecessary stress to translators.
 273     string strUsage = HelpMessageGroup(_("Options:"));
 274     strUsage += HelpMessageOpt("-?", _("This help message"));
 275     strUsage += HelpMessageOpt("-alerts", strprintf(_("Receive and display P2P network alerts (default: %u)"), DEFAULT_ALERTS));
 276     strUsage += HelpMessageOpt("-alertnotify=<cmd>", _("Execute command when a relevant alert is received or we see a really long fork (%s in cmd is replaced by message)"));
 277     strUsage += HelpMessageOpt("-blocknotify=<cmd>", _("Execute command when the best block changes (%s in cmd is replaced by block hash)"));
 278     strUsage += HelpMessageOpt("-checkblocks=<n>", strprintf(_("How many blocks to check at startup (default: %u, 0 = all)"), 288));
 279     strUsage += HelpMessageOpt("-checklevel=<n>", strprintf(_("How thorough the block verification of -checkblocks is (0-4, default: %u)"), 3));
 280     strUsage += HelpMessageOpt("-conf=<file>", strprintf(_("Specify configuration file (default: %s)"), "bitcoin.conf"));
 281     if (mode == HMM_BITCOIND)
 282     {
 283 #if !defined(WIN32)
 284         strUsage += HelpMessageOpt("-daemon", _("Run in the background as a daemon and accept commands"));
 285 #endif
 286     }
 287     strUsage += HelpMessageOpt("-datadir=<dir>", _("Specify data directory"));
 288     strUsage += HelpMessageOpt("-dbcache=<n>", strprintf(_("Set database cache size in megabytes (%d to %d, default: %d)"), nMinDbCache, nMaxDbCache, nDefaultDbCache));
 289     strUsage += HelpMessageOpt("-loadblock=<file>", _("Imports blocks from external blk000??.dat file") + " " + _("on startup"));
 290     strUsage += HelpMessageOpt("-maxorphantx=<n>", strprintf(_("Keep at most <n> unconnectable transactions in memory (default: %u)"), DEFAULT_MAX_ORPHAN_TRANSACTIONS));
 291     strUsage += HelpMessageOpt("-par=<n>", strprintf(_("Set the number of script verification threads (%u to %d, 0 = auto, <0 = leave that many cores free, default: %d)"),
 292         -GetNumCores(), MAX_SCRIPTCHECK_THREADS, DEFAULT_SCRIPTCHECK_THREADS));
 293 #ifndef WIN32
 294     strUsage += HelpMessageOpt("-pid=<file>", strprintf(_("Specify pid file (default: %s)"), "bitcoind.pid"));
 295 #endif
 296     strUsage += HelpMessageOpt("-prune=<n>", strprintf(_("Reduce storage requirements by pruning (deleting) old blocks. This mode disables wallet support and is incompatible with -txindex. "
 297             "Warning: Reverting this setting requires re-downloading the entire blockchain. "
 298             "(default: 0 = disable pruning blocks, >%u = target size in MiB to use for block files)"), MIN_DISK_SPACE_FOR_BLOCK_FILES / 1024 / 1024));
 299     strUsage += HelpMessageOpt("-reindex", _("Rebuild block chain index from current blk000??.dat files on startup"));
 300 #if !defined(WIN32)
 301     strUsage += HelpMessageOpt("-sysperms", _("Create new files with system default permissions, instead of umask 077 (only effective with disabled wallet functionality)"));
 302 #endif
 303     strUsage += HelpMessageOpt("-txindex", strprintf(_("Maintain a full transaction index, used by the getrawtransaction rpc call (default: %u)"), 0));
 304
 305     strUsage += HelpMessageGroup(_("Connection options:"));
 306     strUsage += HelpMessageOpt("-addnode=<ip>", _("Add a node to connect to and attempt to keep the connection open"));
 307     strUsage += HelpMessageOpt("-banscore=<n>", strprintf(_("Threshold for disconnecting misbehaving peers (default: %u)"), 100));
 308     strUsage += HelpMessageOpt("-bantime=<n>", strprintf(_("Number of seconds to keep misbehaving peers from reconnecting (default: %u)"), 86400));
 309     strUsage += HelpMessageOpt("-bind=<addr>", _("Bind to given address and always listen on it. Use [host]:port notation for IPv6"));
 310     strUsage += HelpMessageOpt("-connect=<ip>", _("Connect only to the specified node(s)"));
 311     strUsage += HelpMessageOpt("-discover", _("Discover own IP addresses (default: 1 when listening and no -externalip or -proxy)"));
 312     strUsage += HelpMessageOpt("-dns", _("Allow DNS lookups for -addnode, -seednode and -connect") + " " + _("(default: 1)"));
 313     strUsage += HelpMessageOpt("-dnsseed", _("Query for peer addresses via DNS lookup, if low on addresses (default: 1 unless -connect)"));
 314     strUsage += HelpMessageOpt("-externalip=<ip>", _("Specify your own public address"));
 315     strUsage += HelpMessageOpt("-forcednsseed", strprintf(_("Always query for peer addresses via DNS lookup (default: %u)"), 0));
 316     strUsage += HelpMessageOpt("-listen", _("Accept connections from outside (default: 1 if no -proxy or -connect)"));
 317     strUsage += HelpMessageOpt("-maxconnections=<n>", strprintf(_("Maintain at most <n> connections to peers (default: %u)"), DEFAULT_MAX_PEER_CONNECTIONS));
 318     strUsage += HelpMessageOpt("-maxreceivebuffer=<n>", strprintf(_("Maximum per-connection receive buffer, <n>*1000 bytes (default: %u)"), 5000));
 319     strUsage += HelpMessageOpt("-maxsendbuffer=<n>", strprintf(_("Maximum per-connection send buffer, <n>*1000 bytes (default: %u)"), 1000));
 320     strUsage += HelpMessageOpt("-onion=<ip:port>", strprintf(_("Use separate SOCKS5 proxy to reach peers via Tor hidden services (default: %s)"), "-proxy"));
 321     strUsage += HelpMessageOpt("-onlynet=<net>", _("Only connect to nodes in network <net> (ipv4, ipv6 or onion)"));
 322     strUsage += HelpMessageOpt("-permitbaremultisig", strprintf(_("Relay non-P2SH multisig (default: %u)"), 1));
 323     strUsage += HelpMessageOpt("-port=<port>", strprintf(_("Listen for connections on <port> (default: %u or testnet: %u)"), 8333, 18333));
 324     strUsage += HelpMessageOpt("-proxy=<ip:port>", _("Connect through SOCKS5 proxy"));
 325     strUsage += HelpMessageOpt("-proxyrandomize", strprintf(_("Randomize credentials for every proxy connection. This enables Tor stream isolation (default: %u)"), 1));
 326     strUsage += HelpMessageOpt("-seednode=<ip>", _("Connect to a node to retrieve peer addresses, and disconnect"));
 327     strUsage += HelpMessageOpt("-timeout=<n>", strprintf(_("Specify connection timeout in milliseconds (minimum: 1, default: %d)"), DEFAULT_CONNECT_TIMEOUT));
 328 #ifdef USE_UPNP
 329 #if USE_UPNP
 330     strUsage += HelpMessageOpt("-upnp", _("Use UPnP to map the listening port (default: 1 when listening and no -proxy)"));
 331 #else
 332     strUsage += HelpMessageOpt("-upnp", strprintf(_("Use UPnP to map the listening port (default: %u)"), 0));
 333 #endif
 334 #endif
 335     strUsage += HelpMessageOpt("-whitebind=<addr>", _("Bind to given address and whitelist peers connecting to it. Use [host]:port notation for IPv6"));
 336     strUsage += HelpMessageOpt("-whitelist=<netmask>", _("Whitelist peers connecting from the given netmask or IP address. Can be specified multiple times.") +
 337         " " + _("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"));
 338     strUsage += HelpMessageOpt("-whiteconnections=<n>", strprintf(_("Reserve this many inbound connections for whitelisted peers (default: %d)"), 0));
 339
 340 #ifdef ENABLE_WALLET
 341     strUsage += HelpMessageGroup(_("Wallet options:"));
 342     strUsage += HelpMessageOpt("-disablewallet", _("Do not load the wallet and disable wallet RPC calls"));
 343     strUsage += HelpMessageOpt("-keypool=<n>", strprintf(_("Set key pool size to <n> (default: %u)"), 100));
 344     if (showDebug)
 345         strUsage += HelpMessageOpt("-mintxfee=<amt>", strprintf("Fees (in %s/kB) smaller than this are considered zero fee for transaction creation (default: %s)",
 346             CURRENCY_UNIT, FormatMoney(CWallet::minTxFee.GetFeePerK())));
 347     strUsage += HelpMessageOpt("-paytxfee=<amt>", strprintf(_("Fee (in %s/kB) to add to transactions you send (default: %s)"),
 348         CURRENCY_UNIT, FormatMoney(payTxFee.GetFeePerK())));
 349     strUsage += HelpMessageOpt("-rescan", _("Rescan the block chain for missing wallet transactions") + " " + _("on startup"));
 350     strUsage += HelpMessageOpt("-salvagewallet", _("Attempt to recover private keys from a corrupt wallet.dat") + " " + _("on startup"));
 351     strUsage += HelpMessageOpt("-sendfreetransactions", strprintf(_("Send transactions as zero-fee transactions if possible (default: %u)"), 0));
 352     strUsage += HelpMessageOpt("-spendzeroconfchange", strprintf(_("Spend unconfirmed change when sending transactions (default: %u)"), 1));
 353     strUsage += HelpMessageOpt("-txconfirmtarget=<n>", strprintf(_("If paytxfee is not set, include enough fee so transactions begin confirmation on average within n blocks (default: %u)"), DEFAULT_TX_CONFIRM_TARGET));
 354     strUsage += HelpMessageOpt("-maxtxfee=<amt>", strprintf(_("Maximum total fees (in %s) to use in a single wallet transaction; setting this too low may abort large transactions (default: %s)"),
 355         CURRENCY_UNIT, FormatMoney(maxTxFee)));
 356     strUsage += HelpMessageOpt("-upgradewallet", _("Upgrade wallet to latest format") + " " + _("on startup"));
 357     strUsage += HelpMessageOpt("-wallet=<file>", _("Specify wallet file (within data directory)") + " " + strprintf(_("(default: %s)"), "wallet.dat"));
 358     strUsage += HelpMessageOpt("-walletbroadcast", _("Make the wallet broadcast transactions") + " " + strprintf(_("(default: %u)"), true));
 359     strUsage += HelpMessageOpt("-walletnotify=<cmd>", _("Execute command when a wallet transaction changes (%s in cmd is replaced by TxID)"));
 360     strUsage += HelpMessageOpt("-zapwallettxes=<mode>", _("Delete all wallet transactions and only recover those parts of the blockchain through -rescan on startup") +
 361         " " + _("(1 = keep tx meta data e.g. account owner and payment request information, 2 = drop tx meta data)"));
 362 #endif
 363
 364     strUsage += HelpMessageGroup(_("Debugging/Testing options:"));
 365     if (showDebug)
 366     {
 367         strUsage += HelpMessageOpt("-checkpoints", strprintf("Disable expensive verification for known chain history (default: %u)", 1));
 368         strUsage += HelpMessageOpt("-dblogsize=<n>", strprintf("Flush database activity from memory pool to disk log every <n> megabytes (default: %u)", 100));
 369         strUsage += HelpMessageOpt("-disablesafemode", strprintf("Disable safemode, override a real safe mode event (default: %u)", 0));
 370         strUsage += HelpMessageOpt("-testsafemode", strprintf("Force safe mode (default: %u)", 0));
 371         strUsage += HelpMessageOpt("-dropmessagestest=<n>", "Randomly drop 1 of every <n> network messages");
 372         strUsage += HelpMessageOpt("-fuzzmessagestest=<n>", "Randomly fuzz 1 of every <n> network messages");
 373         strUsage += HelpMessageOpt("-flushwallet", strprintf("Run a thread to flush wallet periodically (default: %u)", 1));
 374         strUsage += HelpMessageOpt("-stopafterblockimport", strprintf("Stop running after importing blocks from disk (default: %u)", 0));
 375     }
 376     string debugCategories = "addrman, alert, bench, coindb, db, lock, rand, rpc, selectcoins, mempool, mempoolrej, net, proxy, prune"; // Don't translate these and qt below
 377     if (mode == HMM_BITCOIN_QT)
 378         debugCategories += ", qt";
 379     strUsage += HelpMessageOpt("-debug=<category>", strprintf(_("Output debugging information (default: %u, supplying <category> is optional)"), 0) + ". " +
 380         _("If <category> is not supplied or if <category> = 1, output all debugging information.") + _("<category> can be:") + " " + debugCategories + ".");
 381     strUsage += HelpMessageOpt("-gen", strprintf(_("Generate coins (default: %u)"), 0));
 382     strUsage += HelpMessageOpt("-genproclimit=<n>", strprintf(_("Set the number of threads for coin generation if enabled (-1 = all cores, default: %d)"), 1));
 383     strUsage += HelpMessageOpt("-help-debug", _("Show all debugging options (usage: --help -help-debug)"));
 384     strUsage += HelpMessageOpt("-logips", strprintf(_("Include IP addresses in debug output (default: %u)"), 0));
 385     strUsage += HelpMessageOpt("-logtimestamps", strprintf(_("Prepend debug output with timestamp (default: %u)"), 1));
 386     if (showDebug)
 387     {
 388         strUsage += HelpMessageOpt("-limitfreerelay=<n>", strprintf("Continuously rate-limit free transactions to <n>*1000 bytes per minute (default: %u)", 15));
 389         strUsage += HelpMessageOpt("-relaypriority", strprintf("Require high priority for relaying free or low-fee transactions (default: %u)", 1));
 390         strUsage += HelpMessageOpt("-maxsigcachesize=<n>", strprintf("Limit size of signature cache to <n> entries (default: %u)", 50000));
 391     }
 392     strUsage += HelpMessageOpt("-minrelaytxfee=<amt>", strprintf(_("Fees (in %s/kB) smaller than this are considered zero fee for relaying (default: %s)"),
 393         CURRENCY_UNIT, FormatMoney(::minRelayTxFee.GetFeePerK())));
 394     strUsage += HelpMessageOpt("-printtoconsole", _("Send trace/debug info to console instead of debug.log file"));
 395     if (showDebug)
 396     {
 397         strUsage += HelpMessageOpt("-printpriority", strprintf("Log transaction priority and fee per kB when mining blocks (default: %u)", 0));
 398         strUsage += HelpMessageOpt("-privdb", strprintf("Sets the DB_PRIVATE flag in the wallet db environment (default: %u)", 1));
 399         strUsage += HelpMessageOpt("-regtest", "Enter regression test mode, which uses a special chain in which blocks can be solved instantly. "
 400             "This is intended for regression testing tools and app development.");
 401     }
 402     strUsage += HelpMessageOpt("-shrinkdebugfile", _("Shrink debug.log file on client startup (default: 1 when no -debug)"));
 403     strUsage += HelpMessageOpt("-testnet", _("Use the test network"));
 404
 405     strUsage += HelpMessageGroup(_("Node relay options:"));
 406     if (showDebug)
 407         strUsage += HelpMessageOpt("-acceptnonstdtxn", strprintf("Relay and mine \"non-standard\" transactions (%sdefault: %u)", "testnet/regtest only; ", !Params(CBaseChainParams::TESTNET).RequireStandard()));
 408     strUsage += HelpMessageOpt("-datacarrier", strprintf(_("Relay and mine data carrier transactions (default: %u)"), 1));
 409     strUsage += HelpMessageOpt("-datacarriersize", strprintf(_("Maximum size of data in data carrier transactions we relay and mine (default: %u)"), MAX_OP_RETURN_RELAY));
 410
 411     strUsage += HelpMessageGroup(_("Block creation options:"));
 412     strUsage += HelpMessageOpt("-blockminsize=<n>", strprintf(_("Set minimum block size in bytes (default: %u)"), 0));
 413     strUsage += HelpMessageOpt("-blockmaxsize=<n>", strprintf(_("Set maximum block size in bytes (default: %d)"), DEFAULT_BLOCK_MAX_SIZE));
 414     strUsage += HelpMessageOpt("-blockprioritysize=<n>", strprintf(_("Set maximum size of high-priority/low-fee transactions in bytes (default: %d)"), DEFAULT_BLOCK_PRIORITY_SIZE));
 415     if (showDebug)
 416         strUsage += HelpMessageOpt("-blockversion=<n>", strprintf("Override block version to test forking scenarios (default: %d)", (int)CBlock::CURRENT_VERSION));
 417
 418     strUsage += HelpMessageGroup(_("RPC server options:"));
 419     strUsage += HelpMessageOpt("-server", _("Accept command line and JSON-RPC commands"));
 420     strUsage += HelpMessageOpt("-rest", strprintf(_("Accept public REST requests (default: %u)"), 0));
 421     strUsage += HelpMessageOpt("-rpcbind=<addr>", _("Bind to given address to listen for JSON-RPC connections. Use [host]:port notation for IPv6. This option can be specified multiple times (default: bind to all interfaces)"));
 422     strUsage += HelpMessageOpt("-rpcuser=<user>", _("Username for JSON-RPC connections"));
 423     strUsage += HelpMessageOpt("-rpcpassword=<pw>", _("Password for JSON-RPC connections"));
 424     strUsage += HelpMessageOpt("-rpcport=<port>", strprintf(_("Listen for JSON-RPC connections on <port> (default: %u or testnet: %u)"), 8332, 18332));
 425     strUsage += HelpMessageOpt("-rpcallowip=<ip>", _("Allow JSON-RPC connections from specified source. Valid for <ip> are a single IP (e.g. 1.2.3.4), a network/netmask (e.g. 1.2.3.4/255.255.255.0) or a network/CIDR (e.g. 1.2.3.4/24). This option can be specified multiple times"));
 426     strUsage += HelpMessageOpt("-rpcthreads=<n>", strprintf(_("Set the number of threads to service RPC calls (default: %d)"), 4));
 427     strUsage += HelpMessageOpt("-rpckeepalive", strprintf(_("RPC support for HTTP persistent connections (default: %d)"), 1));
 428
 429     strUsage += HelpMessageGroup(_("RPC SSL options: (see the Bitcoin Wiki for SSL setup instructions)"));
 430     strUsage += HelpMessageOpt("-rpcssl", _("Use OpenSSL (https) for JSON-RPC connections"));
 431     strUsage += HelpMessageOpt("-rpcsslcertificatechainfile=<file.cert>", strprintf(_("Server certificate file (default: %s)"), "server.cert"));
 432     strUsage += HelpMessageOpt("-rpcsslprivatekeyfile=<file.pem>", strprintf(_("Server private key (default: %s)"), "server.pem"));
 433     strUsage += HelpMessageOpt("-rpcsslciphers=<ciphers>", strprintf(_("Acceptable ciphers (default: %s)"), "TLSv1.2+HIGH:TLSv1+HIGH:!SSLv2:!aNULL:!eNULL:!3DES:@STRENGTH"));
 434
 435     if (mode == HMM_BITCOIN_QT)
 436     {
 437         strUsage += HelpMessageGroup(_("UI Options:"));
 438         if (showDebug) {
 439             strUsage += HelpMessageOpt("-allowselfsignedrootcertificates", "Allow self signed root certificates (default: 0)");
 440         }
 441         strUsage += HelpMessageOpt("-choosedatadir", _("Choose data directory on startup (default: 0)"));
 442         strUsage += HelpMessageOpt("-lang=<lang>", _("Set language, for example \"de_DE\" (default: system locale)"));
 443         strUsage += HelpMessageOpt("-min", _("Start minimized"));
 444         strUsage += HelpMessageOpt("-rootcertificates=<file>", _("Set SSL root certificates for payment request (default: -system-)"));
 445         strUsage += HelpMessageOpt("-splash", _("Show splash screen on startup (default: 1)"));
 446         if (showDebug) {
 447             strUsage += HelpMessageOpt("-uiplatform", "Select platform to customize UI for (one of windows, macosx, other; default: platform compiled on)");
 448         }
 449     }
 450
 451     return strUsage;
 452 }
 453
 454 std::string LicenseInfo()
 455 {
 456     return FormatParagraph(strprintf(_("Copyright (C) 2009-%i The Bitcoin Core Developers"), COPYRIGHT_YEAR)) + "\n" +
 457            "\n" +
 458            FormatParagraph(_("This is experimental software.")) + "\n" +
 459            "\n" +
 460            FormatParagraph(_("Distributed under the MIT software license, see the accompanying file COPYING or <http://www.opensource.org/licenses/mit-license.php>.")) + "\n" +
 461            "\n" +
 462            FormatParagraph(_("This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit <https://www.openssl.org/> and cryptographic software written by Eric Young and UPnP software written by Thomas Bernard.")) +
 463            "\n";
 464 }
 465
 466 static void BlockNotifyCallback(const uint256& hashNewTip)
 467 {
 468     std::string strCmd = GetArg("-blocknotify", "");
 469
 470     boost::replace_all(strCmd, "%s", hashNewTip.GetHex());
 471     boost::thread t(runCommand, strCmd); // thread runs free
 472 }
 473
 474 struct CImportingNow
 475 {
 476     CImportingNow() {
 477         assert(fImporting == false);
 478         fImporting = true;
 479     }
 480
 481     ~CImportingNow() {
 482         assert(fImporting == true);
 483         fImporting = false;
 484     }
 485 };
 486
 487
 488 // If we're using -prune with -reindex, then delete block files that will be ignored by the
 489 // reindex.  Since reindexing works by starting at block file 0 and looping until a blockfile
 490 // is missing, do the same here to delete any later block files after a gap.  Also delete all
 491 // rev files since they'll be rewritten by the reindex anyway.  This ensures that vinfoBlockFile
 492 // is in sync with what's actually on disk by the time we start downloading, so that pruning
 493 // works correctly.
 494 void CleanupBlockRevFiles()
 495 {
 496     using namespace boost::filesystem;
 497     map<string, path> mapBlockFiles;
 498
 499     // Glob all blk?????.dat and rev?????.dat files from the blocks directory.
 500     // Remove the rev files immediately and insert the blk file paths into an
 501     // ordered map keyed by block file index.
 502     LogPrintf("Removing unusable blk?????.dat and rev?????.dat files for -reindex with -prune\n");
 503     path blocksdir = GetDataDir() / "blocks";
 504     for (directory_iterator it(blocksdir); it != directory_iterator(); it++) {
 505         if (is_regular_file(*it) &&
 506             it->path().filename().string().length() == 12 &&
 507             it->path().filename().string().substr(8,4) == ".dat")
 508         {
 509             if (it->path().filename().string().substr(0,3) == "blk")
 510                 mapBlockFiles[it->path().filename().string().substr(3,5)] = it->path();
 511             else if (it->path().filename().string().substr(0,3) == "rev")
 512                 remove(it->path());
 513         }
 514     }
 515
 516     // Remove all block files that aren't part of a contiguous set starting at
 517     // zero by walking the ordered map (keys are block file indices) by
 518     // keeping a separate counter.  Once we hit a gap (or if 0 doesn't exist)
 519     // start removing block files.
 520     int nContigCounter = 0;
 521     BOOST_FOREACH(const PAIRTYPE(string, path)& item, mapBlockFiles) {
 522         if (atoi(item.first) == nContigCounter) {
 523             nContigCounter++;
 524             continue;
 525         }
 526         remove(item.second);
 527     }
 528 }
 529
 530 void ThreadImport(std::vector<boost::filesystem::path> vImportFiles)
 531 {
 532     RenameThread("bitcoin-loadblk");
 533     // -reindex
 534     if (fReindex) {
 535         CImportingNow imp;
 536         int nFile = 0;
 537         while (true) {
 538             CDiskBlockPos pos(nFile, 0);
 539             if (!boost::filesystem::exists(GetBlockPosFilename(pos, "blk")))
 540                 break; // No block files left to reindex
 541             FILE *file = OpenBlockFile(pos, true);
 542             if (!file)
 543                 break; // This error is logged in OpenBlockFile
 544             LogPrintf("Reindexing block file blk%05u.dat...\n", (unsigned int)nFile);
 545             LoadExternalBlockFile(file, &pos);
 546             nFile++;
 547         }
 548         pblocktree->WriteReindexing(false);
 549         fReindex = false;
 550         LogPrintf("Reindexing finished\n");
 551         // To avoid ending up in a situation without genesis block, re-try initializing (no-op if reindexing worked):
 552         InitBlockIndex();
 553     }
 554
 555     // hardcoded $DATADIR/bootstrap.dat
 556     boost::filesystem::path pathBootstrap = GetDataDir() / "bootstrap.dat";
 557     if (boost::filesystem::exists(pathBootstrap)) {
 558         FILE *file = fopen(pathBootstrap.string().c_str(), "rb");
 559         if (file) {
 560             CImportingNow imp;
 561             boost::filesystem::path pathBootstrapOld = GetDataDir() / "bootstrap.dat.old";
 562             LogPrintf("Importing bootstrap.dat...\n");
 563             LoadExternalBlockFile(file);
 564             RenameOver(pathBootstrap, pathBootstrapOld);
 565         } else {
 566             LogPrintf("Warning: Could not open bootstrap file %s\n", pathBootstrap.string());
 567         }
 568     }
 569
 570     // -loadblock=
 571     BOOST_FOREACH(const boost::filesystem::path& path, vImportFiles) {
 572         FILE *file = fopen(path.string().c_str(), "rb");
 573         if (file) {
 574             CImportingNow imp;
 575             LogPrintf("Importing blocks file %s...\n", path.string());
 576             LoadExternalBlockFile(file);
 577         } else {
 578             LogPrintf("Warning: Could not open blocks file %s\n", path.string());
 579         }
 580     }
 581
 582     if (GetBoolArg("-stopafterblockimport", false)) {
 583         LogPrintf("Stopping after block import\n");
 584         StartShutdown();
 585     }
 586 }
 587
 588 /** Sanity checks
 589  *  Ensure that Bitcoin is running in a usable environment with all
 590  *  necessary library support.
 591  */
 592 bool InitSanityCheck(void)
 593 {
 594     if(!ECC_InitSanityCheck()) {
 595         InitError("OpenSSL appears to lack support for elliptic curve cryptography. For more "
 596                   "information, visit https://en.bitcoin.it/wiki/OpenSSL_and_EC_Libraries");
 597         return false;
 598     }
 599     if (!glibc_sanity_test() || !glibcxx_sanity_test())
 600         return false;
 601
 602     return true;
 603 }
 604
 605 /** Initialize bitcoin.
 606  *  @pre Parameters should be parsed and config file should be read.
 607  */
 608 bool AppInit2(boost::thread_group& threadGroup, CScheduler& scheduler)
 609 {
 610     // ********************************************************* Step 1: setup
 611 #ifdef _MSC_VER
 612     // Turn off Microsoft heap dump noise
 613     _CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE);
 614     _CrtSetReportFile(_CRT_WARN, CreateFileA("NUL", GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, 0));
 615 #endif
 616 #if _MSC_VER >= 1400
 617     // Disable confusing "helpful" text message on abort, Ctrl-C
 618     _set_abort_behavior(0, _WRITE_ABORT_MSG | _CALL_REPORTFAULT);
 619 #endif
 620 #ifdef WIN32
 621     // Enable Data Execution Prevention (DEP)
 622     // Minimum supported OS versions: WinXP SP3, WinVista >= SP1, Win Server 2008
 623     // A failure is non-critical and needs no further attention!
 624 #ifndef PROCESS_DEP_ENABLE
 625     // We define this here, because GCCs winbase.h limits this to _WIN32_WINNT >= 0x0601 (Windows 7),
 626     // which is not correct. Can be removed, when GCCs winbase.h is fixed!
 627 #define PROCESS_DEP_ENABLE 0x00000001
 628 #endif
 629     typedef BOOL (WINAPI *PSETPROCDEPPOL)(DWORD);
 630     PSETPROCDEPPOL setProcDEPPol = (PSETPROCDEPPOL)GetProcAddress(GetModuleHandleA("Kernel32.dll"), "SetProcessDEPPolicy");
 631     if (setProcDEPPol != NULL) setProcDEPPol(PROCESS_DEP_ENABLE);
 632
 633     // Initialize Windows Sockets
 634     WSADATA wsadata;
 635     int ret = WSAStartup(MAKEWORD(2,2), &wsadata);
 636     if (ret != NO_ERROR || LOBYTE(wsadata.wVersion ) != 2 || HIBYTE(wsadata.wVersion) != 2)
 637     {
 638         return InitError(strprintf("Error: Winsock library failed to start (WSAStartup returned error %d)", ret));
 639     }
 640 #endif
 641 #ifndef WIN32
 642
 643     if (GetBoolArg("-sysperms", false)) {
 644 #ifdef ENABLE_WALLET
 645         if (!GetBoolArg("-disablewallet", false))
 646             return InitError("Error: -sysperms is not allowed in combination with enabled wallet functionality");
 647 #endif
 648     } else {
 649         umask(077);
 650     }
 651
 652     // Clean shutdown on SIGTERM
 653     struct sigaction sa;
 654     sa.sa_handler = HandleSIGTERM;
 655     sigemptyset(&sa.sa_mask);
 656     sa.sa_flags = 0;
 657     sigaction(SIGTERM, &sa, NULL);
 658     sigaction(SIGINT, &sa, NULL);
 659
 660     // Reopen debug.log on SIGHUP
 661     struct sigaction sa_hup;
 662     sa_hup.sa_handler = HandleSIGHUP;
 663     sigemptyset(&sa_hup.sa_mask);
 664     sa_hup.sa_flags = 0;
 665     sigaction(SIGHUP, &sa_hup, NULL);
 666
 667 #if defined (__SVR4) && defined (__sun)
 668     // ignore SIGPIPE on Solaris
 669     signal(SIGPIPE, SIG_IGN);
 670 #endif
 671 #endif
 672
 673     // ********************************************************* Step 2: parameter interactions
 674     const CChainParams& chainparams = Params();
 675
 676     // Set this early so that parameter interactions go to console
 677     fPrintToConsole = GetBoolArg("-printtoconsole", false);
 678     fLogTimestamps = GetBoolArg("-logtimestamps", true);
 679     fLogIPs = GetBoolArg("-logips", false);
 680
 681     LogPrintf("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
 682     LogPrintf("Bitcoin version %s (%s)\n", FormatFullVersion(), CLIENT_DATE);
 683
 684     // when specifying an explicit binding address, you want to listen on it
 685     // even when -connect or -proxy is specified
 686     if (mapArgs.count("-bind")) {
 687         if (SoftSetBoolArg("-listen", true))
 688             LogPrintf("%s: parameter interaction: -bind set -> setting -listen=1\n", __func__);
 689     }
 690     if (mapArgs.count("-whitebind")) {
 691         if (SoftSetBoolArg("-listen", true))
 692             LogPrintf("%s: parameter interaction: -whitebind set -> setting -listen=1\n", __func__);
 693     }
 694
 695     if (mapArgs.count("-connect") && mapMultiArgs["-connect"].size() > 0) {
 696         // when only connecting to trusted nodes, do not seed via DNS, or listen by default
 697         if (SoftSetBoolArg("-dnsseed", false))
 698             LogPrintf("%s: parameter interaction: -connect set -> setting -dnsseed=0\n", __func__);
 699         if (SoftSetBoolArg("-listen", false))
 700             LogPrintf("%s: parameter interaction: -connect set -> setting -listen=0\n", __func__);
 701     }
 702
 703     if (mapArgs.count("-proxy")) {
 704         // to protect privacy, do not listen by default if a default proxy server is specified
 705         if (SoftSetBoolArg("-listen", false))
 706             LogPrintf("%s: parameter interaction: -proxy set -> setting -listen=0\n", __func__);
 707         // to protect privacy, do not use UPNP when a proxy is set. The user may still specify -listen=1
 708         // to listen locally, so don't rely on this happening through -listen below.
 709         if (SoftSetBoolArg("-upnp", false))
 710             LogPrintf("%s: parameter interaction: -proxy set -> setting -upnp=0\n", __func__);
 711         // to protect privacy, do not discover addresses by default
 712         if (SoftSetBoolArg("-discover", false))
 713             LogPrintf("%s: parameter interaction: -proxy set -> setting -discover=0\n", __func__);
 714     }
 715
 716     if (!GetBoolArg("-listen", DEFAULT_LISTEN)) {
 717         // do not map ports or try to retrieve public IP when not listening (pointless)
 718         if (SoftSetBoolArg("-upnp", false))
 719             LogPrintf("%s: parameter interaction: -listen=0 -> setting -upnp=0\n", __func__);
 720         if (SoftSetBoolArg("-discover", false))
 721             LogPrintf("%s: parameter interaction: -listen=0 -> setting -discover=0\n", __func__);
 722     }
 723
 724     if (mapArgs.count("-externalip")) {
 725         // if an explicit public IP is specified, do not try to find others
 726         if (SoftSetBoolArg("-discover", false))
 727             LogPrintf("%s: parameter interaction: -externalip set -> setting -discover=0\n", __func__);
 728     }
 729
 730     if (GetBoolArg("-salvagewallet", false)) {
 731         // Rewrite just private keys: rescan to find transactions
 732         if (SoftSetBoolArg("-rescan", true))
 733             LogPrintf("%s: parameter interaction: -salvagewallet=1 -> setting -rescan=1\n", __func__);
 734     }
 735
 736     // -zapwallettx implies a rescan
 737     if (GetBoolArg("-zapwallettxes", false)) {
 738         if (SoftSetBoolArg("-rescan", true))
 739             LogPrintf("%s: parameter interaction: -zapwallettxes=<mode> -> setting -rescan=1\n", __func__);
 740     }
 741
 742     // if using block pruning, then disable txindex
 743     if (GetArg("-prune", 0)) {
 744         if (GetBoolArg("-txindex", false))
 745             return InitError(_("Prune mode is incompatible with -txindex."));
 746 #ifdef ENABLE_WALLET
 747         if (GetBoolArg("-rescan", false)) {
 748             return InitError(_("Rescans are not possible in pruned mode. You will need to use -reindex which will download the whole blockchain again."));
 749         }
 750 #endif
 751     }
 752
 753     // Make sure enough file descriptors are available
 754     int nBind = std::max((int)mapArgs.count("-bind") + (int)mapArgs.count("-whitebind"), 1);
 755     int nUserMaxConnections = GetArg("-maxconnections", DEFAULT_MAX_PEER_CONNECTIONS);
 756     nMaxConnections = std::max(nUserMaxConnections, 0);
 757     int nUserWhiteConnections = GetArg("-whiteconnections", 0);
 758     nWhiteConnections = std::max(nUserWhiteConnections, 0);
 759
 760     if ((mapArgs.count("-whitelist")) || (mapArgs.count("-whitebind"))) {
 761         if (!(mapArgs.count("-maxconnections"))) {
 762             // User is using whitelist feature,
 763             // but did not specify -maxconnections parameter.
 764             // Silently increase the default to compensate,
 765             // so that the whitelist connection reservation feature
 766             // does not inadvertently reduce the default
 767             // inbound connection capacity of the network.
 768             nMaxConnections += nWhiteConnections;
 769         }
 770     } else {
 771         // User not using whitelist feature.
 772         // Silently disable connection reservation,
 773         // for the same reason as above.
 774         nWhiteConnections = 0;
 775     }
 776
 777     // Trim requested connection counts, to fit into system limitations
 778     nMaxConnections = std::max(std::min(nMaxConnections, (int)(FD_SETSIZE - nBind - MIN_CORE_FILEDESCRIPTORS)), 0);
 779     int nFD = RaiseFileDescriptorLimit(nMaxConnections + MIN_CORE_FILEDESCRIPTORS);
 780     if (nFD < MIN_CORE_FILEDESCRIPTORS)
 781         return InitError(_("Not enough file descriptors available."));
 782     nMaxConnections = std::min(nFD - MIN_CORE_FILEDESCRIPTORS, nMaxConnections);
 783
 784     if (nMaxConnections < nUserMaxConnections)
 785         InitWarning(strprintf(_("Reducing -maxconnections from %d to %d, because of system limitations."), nUserMaxConnections, nMaxConnections));
 786
 787     // Connection capacity is prioritized in this order:
 788     // outbound connections (hardcoded to 8),
 789     // then whitelisted connections,
 790     // then non-whitelisted connections get whatever's left (if any).
 791     if ((nWhiteConnections > 0) && (nWhiteConnections >= (nMaxConnections - 8)))
 792         InitWarning(strprintf(_("All non-whitelisted incoming connections will be dropped, because -whiteconnections is %d and -maxconnections is only %d."), nWhiteConnections, nMaxConnections));
 793
 794     // ********************************************************* Step 3: parameter-to-internal-flags
 795
 796     fDebug = !mapMultiArgs["-debug"].empty();
 797     // Special-case: if -debug=0/-nodebug is set, turn off debugging messages
 798     const vector<string>& categories = mapMultiArgs["-debug"];
 799     if (GetBoolArg("-nodebug", false) || find(categories.begin(), categories.end(), string("0")) != categories.end())
 800         fDebug = false;
 801
 802     // Check for -debugnet
 803     if (GetBoolArg("-debugnet", false))
 804         InitWarning(_("Warning: Unsupported argument -debugnet ignored, use -debug=net."));
 805     // Check for -socks - as this is a privacy risk to continue, exit here
 806     if (mapArgs.count("-socks"))
 807         return InitError(_("Error: Unsupported argument -socks found. Setting SOCKS version isn't possible anymore, only SOCKS5 proxies are supported."));
 808     // Check for -tor - as this is a privacy risk to continue, exit here
 809     if (GetBoolArg("-tor", false))
 810         return InitError(_("Error: Unsupported argument -tor found, use -onion."));
 811
 812     if (GetBoolArg("-benchmark", false))
 813         InitWarning(_("Warning: Unsupported argument -benchmark ignored, use -debug=bench."));
 814
 815     // Checkmempool and checkblockindex default to true in regtest mode
 816     mempool.setSanityCheck(GetBoolArg("-checkmempool", chainparams.DefaultConsistencyChecks()));
 817     fCheckBlockIndex = GetBoolArg("-checkblockindex", chainparams.DefaultConsistencyChecks());
 818     fCheckpointsEnabled = GetBoolArg("-checkpoints", true);
 819
 820     // -par=0 means autodetect, but nScriptCheckThreads==0 means no concurrency
 821     nScriptCheckThreads = GetArg("-par", DEFAULT_SCRIPTCHECK_THREADS);
 822     if (nScriptCheckThreads <= 0)
 823         nScriptCheckThreads += GetNumCores();
 824     if (nScriptCheckThreads <= 1)
 825         nScriptCheckThreads = 0;
 826     else if (nScriptCheckThreads > MAX_SCRIPTCHECK_THREADS)
 827         nScriptCheckThreads = MAX_SCRIPTCHECK_THREADS;
 828
 829     fServer = GetBoolArg("-server", false);
 830
 831     // block pruning; get the amount of disk space (in MB) to allot for block & undo files
 832     int64_t nSignedPruneTarget = GetArg("-prune", 0) * 1024 * 1024;
 833     if (nSignedPruneTarget < 0) {
 834         return InitError(_("Prune cannot be configured with a negative value."));
 835     }
 836     nPruneTarget = (uint64_t) nSignedPruneTarget;
 837     if (nPruneTarget) {
 838         if (nPruneTarget < MIN_DISK_SPACE_FOR_BLOCK_FILES) {
 839             return InitError(strprintf(_("Prune configured below the minimum of %d MB.  Please use a higher number."), MIN_DISK_SPACE_FOR_BLOCK_FILES / 1024 / 1024));
 840         }
 841         LogPrintf("Prune configured to target %uMiB on disk for block and undo files.\n", nPruneTarget / 1024 / 1024);
 842         fPruneMode = true;
 843     }
 844
 845 #ifdef ENABLE_WALLET
 846     bool fDisableWallet = GetBoolArg("-disablewallet", false);
 847 #endif
 848
 849     nConnectTimeout = GetArg("-timeout", DEFAULT_CONNECT_TIMEOUT);
 850     if (nConnectTimeout <= 0)
 851         nConnectTimeout = DEFAULT_CONNECT_TIMEOUT;
 852
 853     // Fee-per-kilobyte amount considered the same as "free"
 854     // If you are mining, be careful setting this:
 855     // if you set it to zero then
 856     // a transaction spammer can cheaply fill blocks using
 857     // 1-satoshi-fee transactions. It should be set above the real
 858     // cost to you of processing a transaction.
 859     if (mapArgs.count("-minrelaytxfee"))
 860     {
 861         CAmount n = 0;
 862         if (ParseMoney(mapArgs["-minrelaytxfee"], n) && n > 0)
 863             ::minRelayTxFee = CFeeRate(n);
 864         else
 865             return InitError(strprintf(_("Invalid amount for -minrelaytxfee=<amount>: '%s'"), mapArgs["-minrelaytxfee"]));
 866     }
 867
 868     fRequireStandard = !GetBoolArg("-acceptnonstdtxn", !Params().RequireStandard());
 869     if (Params().RequireStandard() && !fRequireStandard)
 870         return InitError(strprintf("acceptnonstdtxn is not currently supported for %s chain", chainparams.NetworkIDString()));
 871
 872 #ifdef ENABLE_WALLET
 873     if (mapArgs.count("-mintxfee"))
 874     {
 875         CAmount n = 0;
 876         if (ParseMoney(mapArgs["-mintxfee"], n) && n > 0)
 877             CWallet::minTxFee = CFeeRate(n);
 878         else
 879             return InitError(strprintf(_("Invalid amount for -mintxfee=<amount>: '%s'"), mapArgs["-mintxfee"]));
 880     }
 881     if (mapArgs.count("-paytxfee"))
 882     {
 883         CAmount nFeePerK = 0;
 884         if (!ParseMoney(mapArgs["-paytxfee"], nFeePerK))
 885             return InitError(strprintf(_("Invalid amount for -paytxfee=<amount>: '%s'"), mapArgs["-paytxfee"]));
 886         if (nFeePerK > nHighTransactionFeeWarning)
 887             InitWarning(_("Warning: -paytxfee is set very high! This is the transaction fee you will pay if you send a transaction."));
 888         payTxFee = CFeeRate(nFeePerK, 1000);
 889         if (payTxFee < ::minRelayTxFee)
 890         {
 891             return InitError(strprintf(_("Invalid amount for -paytxfee=<amount>: '%s' (must be at least %s)"),
 892                                        mapArgs["-paytxfee"], ::minRelayTxFee.ToString()));
 893         }
 894     }
 895     if (mapArgs.count("-maxtxfee"))
 896     {
 897         CAmount nMaxFee = 0;
 898         if (!ParseMoney(mapArgs["-maxtxfee"], nMaxFee))
 899             return InitError(strprintf(_("Invalid amount for -maxtxfee=<amount>: '%s'"), mapArgs["-maptxfee"]));
 900         if (nMaxFee > nHighTransactionMaxFeeWarning)
 901             InitWarning(_("Warning: -maxtxfee is set very high! Fees this large could be paid on a single transaction."));
 902         maxTxFee = nMaxFee;
 903         if (CFeeRate(maxTxFee, 1000) < ::minRelayTxFee)
 904         {
 905             return InitError(strprintf(_("Invalid amount for -maxtxfee=<amount>: '%s' (must be at least the minrelay fee of %s to prevent stuck transactions)"),
 906                                        mapArgs["-maxtxfee"], ::minRelayTxFee.ToString()));
 907         }
 908     }
 909     nTxConfirmTarget = GetArg("-txconfirmtarget", DEFAULT_TX_CONFIRM_TARGET);
 910     bSpendZeroConfChange = GetBoolArg("-spendzeroconfchange", true);
 911     fSendFreeTransactions = GetBoolArg("-sendfreetransactions", false);
 912
 913     std::string strWalletFile = GetArg("-wallet", "wallet.dat");
 914 #endif // ENABLE_WALLET
 915
 916     fIsBareMultisigStd = GetBoolArg("-permitbaremultisig", true);
 917     nMaxDatacarrierBytes = GetArg("-datacarriersize", nMaxDatacarrierBytes);
 918
 919     fAlerts = GetBoolArg("-alerts", DEFAULT_ALERTS);
 920
 921     // Option to startup with mocktime set (used for regression testing):
 922     SetMockTime(GetArg("-mocktime", 0)); // SetMockTime(0) is a no-op
 923
 924     // ********************************************************* Step 4: application initialization: dir lock, daemonize, pidfile, debug log
 925
 926     // Initialize elliptic curve code
 927     ECC_Start();
 928
 929     // Sanity check
 930     if (!InitSanityCheck())
 931         return InitError(_("Initialization sanity check failed. Bitcoin Core is shutting down."));
 932
 933     std::string strDataDir = GetDataDir().string();
 934 #ifdef ENABLE_WALLET
 935     // Wallet file must be a plain filename without a directory
 936     if (strWalletFile != boost::filesystem::basename(strWalletFile) + boost::filesystem::extension(strWalletFile))
 937         return InitError(strprintf(_("Wallet %s resides outside data directory %s"), strWalletFile, strDataDir));
 938 #endif
 939     // Make sure only a single Bitcoin process is using the data directory.
 940     boost::filesystem::path pathLockFile = GetDataDir() / ".lock";
 941     FILE* file = fopen(pathLockFile.string().c_str(), "a"); // empty lock file; created if it doesn't exist.
 942     if (file) fclose(file);
 943
 944     try {
 945         static boost::interprocess::file_lock lock(pathLockFile.string().c_str());
 946         if (!lock.try_lock())
 947             return InitError(strprintf(_("Cannot obtain a lock on data directory %s. Bitcoin Core is probably already running."), strDataDir));
 948     } catch(const boost::interprocess::interprocess_exception& e) {
 949         return InitError(strprintf(_("Cannot obtain a lock on data directory %s. Bitcoin Core is probably already running.") + " %s.", strDataDir, e.what()));
 950     }
 951
 952 #ifndef WIN32
 953     CreatePidFile(GetPidFile(), getpid());
 954 #endif
 955     if (GetBoolArg("-shrinkdebugfile", !fDebug))
 956         ShrinkDebugFile();
 957
 958     if (fPrintToDebugLog)
 959         OpenDebugLog();
 960
 961     LogPrintf("Using OpenSSL version %s\n", SSLeay_version(SSLEAY_VERSION));
 962 #ifdef ENABLE_WALLET
 963     LogPrintf("Using BerkeleyDB version %s\n", DbEnv::version(0, 0, 0));
 964 #endif
 965     if (!fLogTimestamps)
 966         LogPrintf("Startup time: %s\n", DateTimeStrFormat("%Y-%m-%d %H:%M:%S", GetTime()));
 967     LogPrintf("Default data directory %s\n", GetDefaultDataDir().string());
 968     LogPrintf("Using data directory %s\n", strDataDir);
 969     LogPrintf("Using config file %s\n", GetConfigFile().string());
 970     LogPrintf("Using at most %i connections (%i file descriptors available)\n", nMaxConnections, nFD);
 971     if (nWhiteConnections > 0)
 972         LogPrintf("Reserving %i of these connections for whitelisted inbound peers\n", nWhiteConnections);
 973     std::ostringstream strErrors;
 974
 975     LogPrintf("Using %u threads for script verification\n", nScriptCheckThreads);
 976     if (nScriptCheckThreads) {
 977         for (int i=0; i<nScriptCheckThreads-1; i++)
 978             threadGroup.create_thread(&ThreadScriptCheck);
 979     }
 980
 981     // Start the lightweight task scheduler thread
 982     CScheduler::Function serviceLoop = boost::bind(&CScheduler::serviceQueue, &scheduler);
 983     threadGroup.create_thread(boost::bind(&TraceThread<CScheduler::Function>, "scheduler", serviceLoop));
 984
 985     /* Start the RPC server already.  It will be started in "warmup" mode
 986      * and not really process calls already (but it will signify connections
 987      * that the server is there and will be ready later).  Warmup mode will
 988      * be disabled when initialisation is finished.
 989      */
 990     if (fServer)
 991     {
 992         uiInterface.InitMessage.connect(SetRPCWarmupStatus);
 993         RPCServer::OnStopped(&OnRPCStopped);
 994         RPCServer::OnPreCommand(&OnRPCPreCommand);
 995         StartRPCThreads();
 996     }
 997
 998     int64_t nStart;
 999
1000     // ********************************************************* Step 5: verify wallet database integrity
1001 #ifdef ENABLE_WALLET
1002     if (!fDisableWallet) {
1003         LogPrintf("Using wallet %s\n", strWalletFile);
1004         uiInterface.InitMessage(_("Verifying wallet..."));
1005
1006         std::string warningString;
1007         std::string errorString;
1008
1009         if (!CWallet::Verify(strWalletFile, warningString, errorString))
1010             return false;
1011
1012         if (!warningString.empty())
1013             InitWarning(warningString);
1014         if (!errorString.empty())
1015             return InitError(warningString);
1016
1017     } // (!fDisableWallet)
1018 #endif // ENABLE_WALLET
1019     // ********************************************************* Step 6: network initialization
1020
1021     RegisterNodeSignals(GetNodeSignals());
1022
1023     // format user agent, check total size
1024     strSubVersion = FormatSubVersion(CLIENT_NAME, CLIENT_VERSION, mapMultiArgs.count("-uacomment") ? mapMultiArgs["-uacomment"] : std::vector<string>());
1025     if (strSubVersion.size() > MAX_SUBVERSION_LENGTH) {
1026         return InitError(strprintf("Total length of network version string %i exceeds maximum of %i characters. Reduce the number and/or size of uacomments.",
1027             strSubVersion.size(), MAX_SUBVERSION_LENGTH));
1028     }
1029
1030     if (mapArgs.count("-onlynet")) {
1031         std::set<enum Network> nets;
1032         BOOST_FOREACH(const std::string& snet, mapMultiArgs["-onlynet"]) {
1033             enum Network net = ParseNetwork(snet);
1034             if (net == NET_UNROUTABLE)
1035                 return InitError(strprintf(_("Unknown network specified in -onlynet: '%s'"), snet));
1036             nets.insert(net);
1037         }
1038         for (int n = 0; n < NET_MAX; n++) {
1039             enum Network net = (enum Network)n;
1040             if (!nets.count(net))
1041                 SetLimited(net);
1042         }
1043     }
1044
1045     if (mapArgs.count("-whitelist")) {
1046         BOOST_FOREACH(const std::string& net, mapMultiArgs["-whitelist"]) {
1047             CSubNet subnet(net);
1048             if (!subnet.IsValid())
1049                 return InitError(strprintf(_("Invalid netmask specified in -whitelist: '%s'"), net));
1050             CNode::AddWhitelistedRange(subnet);
1051         }
1052     }
1053
1054     bool proxyRandomize = GetBoolArg("-proxyrandomize", true);
1055     // -proxy sets a proxy for all outgoing network traffic
1056     // -noproxy (or -proxy=0) as well as the empty string can be used to not set a proxy, this is the default
1057     std::string proxyArg = GetArg("-proxy", "");
1058     if (proxyArg != "" && proxyArg != "0") {
1059         proxyType addrProxy = proxyType(CService(proxyArg, 9050), proxyRandomize);
1060         if (!addrProxy.IsValid())
1061             return InitError(strprintf(_("Invalid -proxy address: '%s'"), proxyArg));
1062
1063         SetProxy(NET_IPV4, addrProxy);
1064         SetProxy(NET_IPV6, addrProxy);
1065         SetProxy(NET_TOR, addrProxy);
1066         SetNameProxy(addrProxy);
1067         SetReachable(NET_TOR); // by default, -proxy sets onion as reachable, unless -noonion later
1068     }
1069
1070     // -onion can be used to set only a proxy for .onion, or override normal proxy for .onion addresses
1071     // -noonion (or -onion=0) disables connecting to .onion entirely
1072     // An empty string is used to not override the onion proxy (in which case it defaults to -proxy set above, or none)
1073     std::string onionArg = GetArg("-onion", "");
1074     if (onionArg != "") {
1075         if (onionArg == "0") { // Handle -noonion/-onion=0
1076             SetReachable(NET_TOR, false); // set onions as unreachable
1077         } else {
1078             proxyType addrOnion = proxyType(CService(onionArg, 9050), proxyRandomize);
1079             if (!addrOnion.IsValid())
1080                 return InitError(strprintf(_("Invalid -onion address: '%s'"), onionArg));
1081             SetProxy(NET_TOR, addrOnion);
1082             SetReachable(NET_TOR);
1083         }
1084     }
1085
1086     // see Step 2: parameter interactions for more information about these
1087     fListen = GetBoolArg("-listen", DEFAULT_LISTEN);
1088     fDiscover = GetBoolArg("-discover", true);
1089     fNameLookup = GetBoolArg("-dns", true);
1090
1091     bool fBound = false;
1092     if (fListen) {
1093         if (mapArgs.count("-bind") || mapArgs.count("-whitebind")) {
1094             BOOST_FOREACH(const std::string& strBind, mapMultiArgs["-bind"]) {
1095                 CService addrBind;
1096                 if (!Lookup(strBind.c_str(), addrBind, GetListenPort(), false))
1097                     return InitError(strprintf(_("Cannot resolve -bind address: '%s'"), strBind));
1098                 fBound |= Bind(addrBind, (BF_EXPLICIT | BF_REPORT_ERROR));
1099             }
1100             BOOST_FOREACH(const std::string& strBind, mapMultiArgs["-whitebind"]) {
1101                 CService addrBind;
1102                 if (!Lookup(strBind.c_str(), addrBind, 0, false))
1103                     return InitError(strprintf(_("Cannot resolve -whitebind address: '%s'"), strBind));
1104                 if (addrBind.GetPort() == 0)
1105                     return InitError(strprintf(_("Need to specify a port with -whitebind: '%s'"), strBind));
1106                 fBound |= Bind(addrBind, (BF_EXPLICIT | BF_REPORT_ERROR | BF_WHITELIST));
1107             }
1108         }
1109         else {
1110             struct in_addr inaddr_any;
1111             inaddr_any.s_addr = INADDR_ANY;
1112             fBound |= Bind(CService(in6addr_any, GetListenPort()), BF_NONE);
1113             fBound |= Bind(CService(inaddr_any, GetListenPort()), !fBound ? BF_REPORT_ERROR : BF_NONE);
1114         }
1115         if (!fBound)
1116             return InitError(_("Failed to listen on any port. Use -listen=0 if you want this."));
1117     }
1118
1119     if (mapArgs.count("-externalip")) {
1120         BOOST_FOREACH(const std::string& strAddr, mapMultiArgs["-externalip"]) {
1121             CService addrLocal(strAddr, GetListenPort(), fNameLookup);
1122             if (!addrLocal.IsValid())
1123                 return InitError(strprintf(_("Cannot resolve -externalip address: '%s'"), strAddr));
1124             AddLocal(CService(strAddr, GetListenPort(), fNameLookup), LOCAL_MANUAL);
1125         }
1126     }
1127
1128     BOOST_FOREACH(const std::string& strDest, mapMultiArgs["-seednode"])
1129         AddOneShot(strDest);
1130
1131     // ********************************************************* Step 7: load block chain
1132
1133     fReindex = GetBoolArg("-reindex", false);
1134
1135     // Upgrading to 0.8; hard-link the old blknnnn.dat files into /blocks/
1136     boost::filesystem::path blocksDir = GetDataDir() / "blocks";
1137     if (!boost::filesystem::exists(blocksDir))
1138     {
1139         boost::filesystem::create_directories(blocksDir);
1140         bool linked = false;
1141         for (unsigned int i = 1; i < 10000; i++) {
1142             boost::filesystem::path source = GetDataDir() / strprintf("blk%04u.dat", i);
1143             if (!boost::filesystem::exists(source)) break;
1144             boost::filesystem::path dest = blocksDir / strprintf("blk%05u.dat", i-1);
1145             try {
1146                 boost::filesystem::create_hard_link(source, dest);
1147                 LogPrintf("Hardlinked %s -> %s\n", source.string(), dest.string());
1148                 linked = true;
1149             } catch (const boost::filesystem::filesystem_error& e) {
1150                 // Note: hardlink creation failing is not a disaster, it just means
1151                 // blocks will get re-downloaded from peers.
1152                 LogPrintf("Error hardlinking blk%04u.dat: %s\n", i, e.what());
1153                 break;
1154             }
1155         }
1156         if (linked)
1157         {
1158             fReindex = true;
1159         }
1160     }
1161
1162     // cache size calculations
1163     int64_t nTotalCache = (GetArg("-dbcache", nDefaultDbCache) << 20);
1164     nTotalCache = std::max(nTotalCache, nMinDbCache << 20); // total cache cannot be less than nMinDbCache
1165     nTotalCache = std::min(nTotalCache, nMaxDbCache << 20); // total cache cannot be greated than nMaxDbcache
1166     int64_t nBlockTreeDBCache = nTotalCache / 8;
1167     if (nBlockTreeDBCache > (1 << 21) && !GetBoolArg("-txindex", false))
1168         nBlockTreeDBCache = (1 << 21); // block tree db cache shouldn't be larger than 2 MiB
1169     nTotalCache -= nBlockTreeDBCache;
1170     int64_t nCoinDBCache = std::min(nTotalCache / 2, (nTotalCache / 4) + (1 << 23)); // use 25%-50% of the remainder for disk cache
1171     nTotalCache -= nCoinDBCache;
1172     nCoinCacheUsage = nTotalCache; // the rest goes to in-memory cache
1173     LogPrintf("Cache configuration:\n");
1174     LogPrintf("* Using %.1fMiB for block index database\n", nBlockTreeDBCache * (1.0 / 1024 / 1024));
1175     LogPrintf("* Using %.1fMiB for chain state database\n", nCoinDBCache * (1.0 / 1024 / 1024));
1176     LogPrintf("* Using %.1fMiB for in-memory UTXO set\n", nCoinCacheUsage * (1.0 / 1024 / 1024));
1177
1178     bool fLoaded = false;
1179     while (!fLoaded) {
1180         bool fReset = fReindex;
1181         std::string strLoadError;
1182
1183         uiInterface.InitMessage(_("Loading block index..."));
1184
1185         nStart = GetTimeMillis();
1186         do {
1187             try {
1188                 UnloadBlockIndex();
1189                 delete pcoinsTip;
1190                 delete pcoinsdbview;
1191                 delete pcoinscatcher;
1192                 delete pblocktree;
1193
1194                 pblocktree = new CBlockTreeDB(nBlockTreeDBCache, false, fReindex);
1195                 pcoinsdbview = new CCoinsViewDB(nCoinDBCache, false, fReindex);
1196                 pcoinscatcher = new CCoinsViewErrorCatcher(pcoinsdbview);
1197                 pcoinsTip = new CCoinsViewCache(pcoinscatcher);
1198
1199                 if (fReindex) {
1200                     pblocktree->WriteReindexing(true);
1201                     //If we're reindexing in prune mode, wipe away unusable block files and all undo data files
1202                     if (fPruneMode)
1203                         CleanupBlockRevFiles();
1204                 }
1205
1206                 if (!LoadBlockIndex()) {
1207                     strLoadError = _("Error loading block database");
1208                     break;
1209                 }
1210
1211                 // If the loaded chain has a wrong genesis, bail out immediately
1212                 // (we're likely using a testnet datadir, or the other way around).
1213                 if (!mapBlockIndex.empty() && mapBlockIndex.count(chainparams.GetConsensus().hashGenesisBlock) == 0)
1214                     return InitError(_("Incorrect or no genesis block found. Wrong datadir for network?"));
1215
1216                 // Initialize the block index (no-op if non-empty database was already loaded)
1217                 if (!InitBlockIndex()) {
1218                     strLoadError = _("Error initializing block database");
1219                     break;
1220                 }
1221
1222                 // Check for changed -txindex state
1223                 if (fTxIndex != GetBoolArg("-txindex", false)) {
1224                     strLoadError = _("You need to rebuild the database using -reindex to change -txindex");
1225                     break;
1226                 }
1227
1228                 // Check for changed -prune state.  What we are concerned about is a user who has pruned blocks
1229                 // in the past, but is now trying to run unpruned.
1230                 if (fHavePruned && !fPruneMode) {
1231                     strLoadError = _("You need to rebuild the database using -reindex to go back to unpruned mode.  This will redownload the entire blockchain");
1232                     break;
1233                 }
1234
1235                 uiInterface.InitMessage(_("Verifying blocks..."));
1236                 if (fHavePruned && GetArg("-checkblocks", 288) > MIN_BLOCKS_TO_KEEP) {
1237                     LogPrintf("Prune: pruned datadir may not have more than %d blocks; -checkblocks=%d may fail\n",
1238                         MIN_BLOCKS_TO_KEEP, GetArg("-checkblocks", 288));
1239                 }
1240
1241                 {
1242                     LOCK(cs_main);
1243                     CBlockIndex* tip = chainActive.Tip();
1244                     if (tip && tip->nTime > GetAdjustedTime() + 2 * 60 * 60) {
1245                         strLoadError = _("The block database contains a block which appears to be from the future. "
1246                                 "This may be due to your computer's date and time being set incorrectly. "
1247                                 "Only rebuild the block database if you are sure that your computer's date and time are correct");
1248                         break;
1249                     }
1250                 }
1251
1252                 if (!CVerifyDB().VerifyDB(pcoinsdbview, GetArg("-checklevel", 3),
1253                               GetArg("-checkblocks", 288))) {
1254                     strLoadError = _("Corrupted block database detected");
1255                     break;
1256                 }
1257             } catch (const std::exception& e) {
1258                 if (fDebug) LogPrintf("%s\n", e.what());
1259                 strLoadError = _("Error opening block database");
1260                 break;
1261             }
1262
1263             fLoaded = true;
1264         } while(false);
1265
1266         if (!fLoaded) {
1267             // first suggest a reindex
1268             if (!fReset) {
1269                 bool fRet = uiInterface.ThreadSafeMessageBox(
1270                     strLoadError + ".\n\n" + _("Do you want to rebuild the block database now?"),
1271                     "", CClientUIInterface::MSG_ERROR | CClientUIInterface::BTN_ABORT);
1272                 if (fRet) {
1273                     fReindex = true;
1274                     fRequestShutdown = false;
1275                 } else {
1276                     LogPrintf("Aborted block database rebuild. Exiting.\n");
1277                     return false;
1278                 }
1279             } else {
1280                 return InitError(strLoadError);
1281             }
1282         }
1283     }
1284
1285     // As LoadBlockIndex can take several minutes, it's possible the user
1286     // requested to kill the GUI during the last operation. If so, exit.
1287     // As the program has not fully started yet, Shutdown() is possibly overkill.
1288     if (fRequestShutdown)
1289     {
1290         LogPrintf("Shutdown requested. Exiting.\n");
1291         return false;
1292     }
1293     LogPrintf(" block index %15dms\n", GetTimeMillis() - nStart);
1294
1295     boost::filesystem::path est_path = GetDataDir() / FEE_ESTIMATES_FILENAME;
1296     CAutoFile est_filein(fopen(est_path.string().c_str(), "rb"), SER_DISK, CLIENT_VERSION);
1297     // Allowed to fail as this file IS missing on first startup.
1298     if (!est_filein.IsNull())
1299         mempool.ReadFeeEstimates(est_filein);
1300     fFeeEstimatesInitialized = true;
1301
1302     // ********************************************************* Step 8: load wallet
1303 #ifdef ENABLE_WALLET
1304     if (fDisableWallet) {
1305         pwalletMain = NULL;
1306         LogPrintf("Wallet disabled!\n");
1307     } else {
1308
1309         // needed to restore wallet transaction meta data after -zapwallettxes
1310         std::vector<CWalletTx> vWtx;
1311
1312         if (GetBoolArg("-zapwallettxes", false)) {
1313             uiInterface.InitMessage(_("Zapping all transactions from wallet..."));
1314
1315             pwalletMain = new CWallet(strWalletFile);
1316             DBErrors nZapWalletRet = pwalletMain->ZapWalletTx(vWtx);
1317             if (nZapWalletRet != DB_LOAD_OK) {
1318                 uiInterface.InitMessage(_("Error loading wallet.dat: Wallet corrupted"));
1319                 return false;
1320             }
1321
1322             delete pwalletMain;
1323             pwalletMain = NULL;
1324         }
1325
1326         uiInterface.InitMessage(_("Loading wallet..."));
1327
1328         nStart = GetTimeMillis();
1329         bool fFirstRun = true;
1330         pwalletMain = new CWallet(strWalletFile);
1331         DBErrors nLoadWalletRet = pwalletMain->LoadWallet(fFirstRun);
1332         if (nLoadWalletRet != DB_LOAD_OK)
1333         {
1334             if (nLoadWalletRet == DB_CORRUPT)
1335                 strErrors << _("Error loading wallet.dat: Wallet corrupted") << "\n";
1336             else if (nLoadWalletRet == DB_NONCRITICAL_ERROR)
1337             {
1338                 string msg(_("Warning: error reading wallet.dat! All keys read correctly, but transaction data"
1339                              " or address book entries might be missing or incorrect."));
1340                 InitWarning(msg);
1341             }
1342             else if (nLoadWalletRet == DB_TOO_NEW)
1343                 strErrors << _("Error loading wallet.dat: Wallet requires newer version of Bitcoin Core") << "\n";
1344             else if (nLoadWalletRet == DB_NEED_REWRITE)
1345             {
1346                 strErrors << _("Wallet needed to be rewritten: restart Bitcoin Core to complete") << "\n";
1347                 LogPrintf("%s", strErrors.str());
1348                 return InitError(strErrors.str());
1349             }
1350             else
1351                 strErrors << _("Error loading wallet.dat") << "\n";
1352         }
1353
1354         if (GetBoolArg("-upgradewallet", fFirstRun))
1355         {
1356             int nMaxVersion = GetArg("-upgradewallet", 0);
1357             if (nMaxVersion == 0) // the -upgradewallet without argument case
1358             {
1359                 LogPrintf("Performing wallet upgrade to %i\n", FEATURE_LATEST);
1360                 nMaxVersion = CLIENT_VERSION;
1361                 pwalletMain->SetMinVersion(FEATURE_LATEST); // permanently upgrade the wallet immediately
1362             }
1363             else
1364                 LogPrintf("Allowing wallet upgrade up to %i\n", nMaxVersion);
1365             if (nMaxVersion < pwalletMain->GetVersion())
1366                 strErrors << _("Cannot downgrade wallet") << "\n";
1367             pwalletMain->SetMaxVersion(nMaxVersion);
1368         }
1369
1370         if (fFirstRun)
1371         {
1372             // Create new keyUser and set as default key
1373             RandAddSeedPerfmon();
1374
1375             CPubKey newDefaultKey;
1376             if (pwalletMain->GetKeyFromPool(newDefaultKey)) {
1377                 pwalletMain->SetDefaultKey(newDefaultKey);
1378                 if (!pwalletMain->SetAddressBook(pwalletMain->vchDefaultKey.GetID(), "", "receive"))
1379                     strErrors << _("Cannot write default address") << "\n";
1380             }
1381
1382             pwalletMain->SetBestChain(chainActive.GetLocator());
1383         }
1384
1385         LogPrintf("%s", strErrors.str());
1386         LogPrintf(" wallet      %15dms\n", GetTimeMillis() - nStart);
1387
1388         RegisterValidationInterface(pwalletMain);
1389
1390         CBlockIndex *pindexRescan = chainActive.Tip();
1391         if (GetBoolArg("-rescan", false))
1392             pindexRescan = chainActive.Genesis();
1393         else
1394         {
1395             CWalletDB walletdb(strWalletFile);
1396             CBlockLocator locator;
1397             if (walletdb.ReadBestBlock(locator))
1398                 pindexRescan = FindForkInGlobalIndex(chainActive, locator);
1399             else
1400                 pindexRescan = chainActive.Genesis();
1401         }
1402         if (chainActive.Tip() && chainActive.Tip() != pindexRescan)
1403         {
1404             //We can't rescan beyond non-pruned blocks, stop and throw an error
1405             //this might happen if a user uses a old wallet within a pruned node
1406             // or if he ran -disablewallet for a longer time, then decided to re-enable
1407             if (fPruneMode)
1408             {
1409                 CBlockIndex *block = chainActive.Tip();
1410                 while (block && block->pprev && (block->pprev->nStatus & BLOCK_HAVE_DATA) && block->pprev->nTx > 0 && pindexRescan != block)
1411                     block = block->pprev;
1412
1413                 if (pindexRescan != block)
1414                     return InitError(_("Prune: last wallet synchronisation goes beyond pruned data. You need to -reindex (download the whole blockchain again in case of pruned node)"));
1415             }
1416
1417             uiInterface.InitMessage(_("Rescanning..."));
1418             LogPrintf("Rescanning last %i blocks (from block %i)...\n", chainActive.Height() - pindexRescan->nHeight, pindexRescan->nHeight);
1419             nStart = GetTimeMillis();
1420             pwalletMain->ScanForWalletTransactions(pindexRescan, true);
1421             LogPrintf(" rescan      %15dms\n", GetTimeMillis() - nStart);
1422             pwalletMain->SetBestChain(chainActive.GetLocator());
1423             nWalletDBUpdated++;
1424
1425             // Restore wallet transaction metadata after -zapwallettxes=1
1426             if (GetBoolArg("-zapwallettxes", false) && GetArg("-zapwallettxes", "1") != "2")
1427             {
1428                 CWalletDB walletdb(strWalletFile);
1429
1430                 BOOST_FOREACH(const CWalletTx& wtxOld, vWtx)
1431                 {
1432                     uint256 hash = wtxOld.GetHash();
1433                     std::map<uint256, CWalletTx>::iterator mi = pwalletMain->mapWallet.find(hash);
1434                     if (mi != pwalletMain->mapWallet.end())
1435                     {
1436                         const CWalletTx* copyFrom = &wtxOld;
1437                         CWalletTx* copyTo = &mi->second;
1438                         copyTo->mapValue = copyFrom->mapValue;
1439                         copyTo->vOrderForm = copyFrom->vOrderForm;
1440                         copyTo->nTimeReceived = copyFrom->nTimeReceived;
1441                         copyTo->nTimeSmart = copyFrom->nTimeSmart;
1442                         copyTo->fFromMe = copyFrom->fFromMe;
1443                         copyTo->strFromAccount = copyFrom->strFromAccount;
1444                         copyTo->nOrderPos = copyFrom->nOrderPos;
1445                         copyTo->WriteToDisk(&walletdb);
1446                     }
1447                 }
1448             }
1449         }
1450         pwalletMain->SetBroadcastTransactions(GetBoolArg("-walletbroadcast", true));
1451     } // (!fDisableWallet)
1452 #else // ENABLE_WALLET
1453     LogPrintf("No wallet support compiled in!\n");
1454 #endif // !ENABLE_WALLET
1455
1456     // ********************************************************* Step 9: data directory maintenance
1457
1458     // if pruning, unset the service bit and perform the initial blockstore prune
1459     // after any wallet rescanning has taken place.
1460     if (fPruneMode) {
1461         uiInterface.InitMessage(_("Pruning blockstore..."));
1462         LogPrintf("Unsetting NODE_NETWORK on prune mode\n");
1463         nLocalServices &= ~NODE_NETWORK;
1464         if (!fReindex) {
1465             PruneAndFlush();
1466         }
1467     }
1468
1469     // ********************************************************* Step 10: import blocks
1470
1471     if (mapArgs.count("-blocknotify"))
1472         uiInterface.NotifyBlockTip.connect(BlockNotifyCallback);
1473
1474     uiInterface.InitMessage(_("Activating best chain..."));
1475     // scan for better chains in the block chain database, that are not yet connected in the active best chain
1476     CValidationState state;
1477     if (!ActivateBestChain(state))
1478         strErrors << "Failed to connect best block";
1479
1480     std::vector<boost::filesystem::path> vImportFiles;
1481     if (mapArgs.count("-loadblock"))
1482     {
1483         BOOST_FOREACH(const std::string& strFile, mapMultiArgs["-loadblock"])
1484             vImportFiles.push_back(strFile);
1485     }
1486     threadGroup.create_thread(boost::bind(&ThreadImport, vImportFiles));
1487     if (chainActive.Tip() == NULL) {
1488         LogPrintf("Waiting for genesis block to be imported...\n");
1489         while (!fRequestShutdown && chainActive.Tip() == NULL)
1490             MilliSleep(10);
1491     }
1492
1493     // ********************************************************* Step 11: start node
1494
1495     if (!CheckDiskSpace())
1496         return false;
1497
1498     if (!strErrors.str().empty())
1499         return InitError(strErrors.str());
1500
1501     RandAddSeedPerfmon();
1502
1503     //// debug print
1504     LogPrintf("mapBlockIndex.size() = %u\n",   mapBlockIndex.size());
1505     LogPrintf("nBestHeight = %d\n",                   chainActive.Height());
1506 #ifdef ENABLE_WALLET
1507     LogPrintf("setKeyPool.size() = %u\n",      pwalletMain ? pwalletMain->setKeyPool.size() : 0);
1508     LogPrintf("mapWallet.size() = %u\n",       pwalletMain ? pwalletMain->mapWallet.size() : 0);
1509     LogPrintf("mapAddressBook.size() = %u\n",  pwalletMain ? pwalletMain->mapAddressBook.size() : 0);
1510 #endif
1511
1512     StartNode(threadGroup, scheduler);
1513
1514     // Monitor the chain, and alert if we get blocks much quicker or slower than expected
1515     int64_t nPowTargetSpacing = Params().GetConsensus().nPowTargetSpacing;
1516     CScheduler::Function f = boost::bind(&PartitionCheck, &IsInitialBlockDownload,
1517                                          boost::ref(cs_main), boost::cref(pindexBestHeader), nPowTargetSpacing);
1518     scheduler.scheduleEvery(f, nPowTargetSpacing);
1519
1520     // Generate coins in the background
1521     GenerateBitcoins(GetBoolArg("-gen", false), GetArg("-genproclimit", 1), Params());
1522
1523     // ********************************************************* Step 11: finished
1524
1525     SetRPCWarmupFinished();
1526     uiInterface.InitMessage(_("Done loading"));
1527
1528 #ifdef ENABLE_WALLET
1529     if (pwalletMain) {
1530         // Add wallet transactions that aren't already in a block to mapTransactions
1531         pwalletMain->ReacceptWalletTransactions();
1532
1533         // Run a thread to flush wallet periodically
1534         threadGroup.create_thread(boost::bind(&ThreadFlushWalletDB, boost::ref(pwalletMain->strWalletFile)));
1535     }
1536 #endif
1537
1538     return !fRequestShutdown;
1539 }