init.cpp

// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2012 The Bitcoin developers
// Copyright (c) 2011-2015 The Peercoin developers
// Copyright (c) 2014-2015 The Paycoin developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "db.h"
#include "walletdb.h"
#include "bitcoinrpc.h"
#include "net.h"
#include "init.h"
#include "util.h"
#include "ui_interface.h"
#include "checkpoints.h"
#include "version.h"
#include "scrapesdb.h"
#include "primenodes.h"
#include <boost/filesystem.hpp>
#include <boost/filesystem/fstream.hpp>
#include <boost/filesystem/convenience.hpp>
#include <boost/interprocess/sync/file_lock.hpp>
#include <boost/algorithm/string/predicate.hpp>
#include <ctime>
#include <openssl/crypto.h>

#ifndef WIN32
#include <signal.h>
#endif

using namespace std;
using namespace boost;

CWallet* pwalletMain;
CScrapesDB* scrapesDB;
int MIN_PROTO_VERSION = 70005;

//////////////////////////////////////////////////////////////////////////////
//
// Shutdown
//

void ExitTimeout(void* parg)
{
#ifdef WIN32
    Sleep(5000);
    ExitProcess(0);
#endif
}

void StartShutdown()
{
#ifdef QT_GUI
    // ensure we leave the Qt main loop for a clean GUI exit (Shutdown() is called in bitcoin.cpp afterwards)
    QueueShutdown();
#else
    // Without UI, Shutdown() can simply be started in a new thread
    NewThread(Shutdown, NULL);
#endif
}

void Shutdown(void* parg)
{
    static CCriticalSection cs_Shutdown;
    static bool fTaken;
    bool fFirstThread = false;
    {
        TRY_LOCK(cs_Shutdown, lockShutdown);
        if (lockShutdown)
        {
            fFirstThread = !fTaken;
            fTaken = true;
        }
    }
    static bool fExit;
    if (fFirstThread)
    {
        fShutdown = true;
        nTransactionsUpdated++;
        if (primeNodeDB)
            primeNodeDB->Close();
        if (scrapesDB)
            scrapesDB->Close();
        bitdb.Flush(false);
        StopNode();
        bitdb.Flush(true);
        boost::filesystem::remove(GetPidFile());
        UnregisterWallet(pwalletMain);
        delete pwalletMain;
        if (primeNodeDB)
            delete primeNodeDB;
        if (scrapesDB)
            delete scrapesDB;
        NewThread(ExitTimeout, NULL);
        Sleep(50);
        printf("Paycoin exited\n\n");
        fExit = true;
#ifndef QT_GUI
        // ensure non-UI client get's exited here, but let Bitcoin-Qt reach return 0; in bitcoin.cpp
        exit(0);
#endif
    }
    else
    {
        while (!fExit)
            Sleep(500);
        Sleep(100);
        ExitThread(0);
    }
}

void HandleSIGTERM(int)
{
    fRequestShutdown = true;
}

void HandleSIGHUP(int)
{
    fReopenDebugLog = true;
}

//////////////////////////////////////////////////////////////////////////////
//
// Start
//
#if !defined(QT_GUI)
int main(int argc, char* argv[])
{
    bool fRet = false;
    fRet = AppInit(argc, argv);

    if (fRet && fDaemon)
        return 0;

    return 1;
}

bool AppInit(int argc, char* argv[])
{
    bool fRet = false;
    try
    {
        //
        // Parameters
        //
        // If Qt is used, parameters/paycoin.conf are parsed in qt/bitcoin.cpp's main()
        ParseParameters(argc, argv);
        if (!boost::filesystem::is_directory(GetDataDir(false)))
        {
            fprintf(stderr, "Error: Specified directory does not exist\n");
            Shutdown(NULL);
        }
        ReadConfigFile(mapArgs, mapMultiArgs);

        if (mapArgs.count("-?") || mapArgs.count("--help"))
        {
            // First part of help message is specified in paycoind / RPC client
            std::string strUsage = _("Paycoin version") + " " + FormatFullVersion() + "\n\n" +
                _("Usage:") + "\n" +
                  "  paycoind [options]                     " + "\n" +
                  "  paycoind [options] <command> [params]  " + _("Send command to server or paycoind") + "\n" +
                  "  paycoind [options] help                " + _("List commands") + "\n" +
                  "  paycoind [options] help <command>      " + _("Get help for a command") + "\n";

            strUsage += "\n" + HelpMessage();

            fprintf(stderr, "%s", strUsage.c_str());
            return false;
        }

        // Do this early so that daemon commands are processed properly
        fTestNet = GetBoolArg("-testnet");

        // Command-line RPC
        for (int i = 1; i < argc; i++)
            if (!IsSwitchChar(argv[i][0]) && !boost::algorithm::istarts_with(argv[i], "paycoin:"))
                fCommandLine = true;

        if (fCommandLine)
        {
            int ret = CommandLineRPC(argc, argv);
            exit(ret);
        }

        fRet = AppInit2();
    }
    catch (std::exception& e) {
        PrintException(&e, "AppInit()");
    } catch (...) {
        PrintException(NULL, "AppInit()");
    }
    if (!fRet)
        Shutdown(NULL);
    return fRet;
}
#endif

bool static InitError(const std::string &str)
{
    ThreadSafeMessageBox(str, _("Paycoin"), wxOK | wxMODAL);
    return false;
}

bool static InitWarning(const std::string &str)
{
    ThreadSafeMessageBox(str, _("Paycoin"), wxOK | wxICON_EXCLAMATION | wxMODAL);
    return true;
}

bool static Bind(const CService &addr) {
    if (IsLimited(addr))
        return false;
    std::string strError;
    if (!BindListenPort(addr, strError))
        return InitError(strError);

    return true;
}

// Core-specific options shared between UI and daemon
std::string HelpMessage()
{
    string strUsage = _("Options:") + "\n" +
        "  -conf=<file>          "   + _("Specify configuration file (default: paycoin.conf)") + "\n" +
        "  -pid=<file>           "   + _("Specify pid file (default: paycoind.pid)") + "\n" +
        "  -gen                  "   + _("Generate coins") + "\n" +
        "  -gen=0                "   + _("Don't generate coins") + "\n" +
        "  -datadir=<dir>        "   + _("Specify data directory") + "\n" +
        "  -dbcache=<n>          "   + _("Set database cache size in megabytes (default: 25)") + "\n" +
        "  -dblogsize=<n>        "   + _("Set database disk log size in megabytes (default: 100)") + "\n" +
        "  -timeout=<n>          "   + _("Specify connection timeout (in milliseconds)") + "\n" +
        "  -proxy=<ip:port>      "   + _("Connect through socks proxy") + "\n" +
        "  -socks=<n>            "   + _("Select the version of socks proxy to use (4 or 5, 5 is default)") + "\n" +
        "  -noproxy=<net>        "   + _("Do not use proxy for connections to network <net> (IPv4 or IPv6)") + "\n" +
        "  -dns                  "   + _("Allow DNS lookups for -addnode, -seednode and -connect") + "\n" +
        "  -proxydns             "   + _("Pass DNS requests to (SOCKS5) proxy") + "\n" +
        "  -port=<port>          "   + _("Listen for connections on <port> (default: 8998 or testnet: 9000)") + "\n" +
        "  -maxconnections=<n>   "   + _("Maintain at most <n> connections to peers (default: 125)") + "\n" +
        "  -addnode=<ip>         "   + _("Add a node to connect to and attempt to keep the connection open") + "\n" +
        "  -connect=<ip>         "   + _("Connect only to the specified node") + "\n" +
        "  -seednode=<ip>        "   + _("Connect to a node to retrieve peer addresses, and disconnect") + "\n" +
        "  -externalip=<ip>      "   + _("Specify your own public address") + "\n" +
        "  -onlynet=<net>        "   + _("Only connect to nodes in network <net> (IPv4 or IPv6)") + "\n" +
        "  -discover             "   + _("Try to discover public IP address (default: 1)") + "\n" +
        "  -listen               "   + _("Accept connections from outside (default: 1)") + "\n" +
        "  -bind=<addr>          "   + _("Bind to given address. Use [host]:port notation for IPv6") + "\n" +
        "  -dnsseed              "   + _("Find peers using DNS lookup (default: 1)") + "\n" +
        "  -banscore=<n>         "   + _("Threshold for disconnecting misbehaving peers (default: 100)") + "\n" +
        "  -bantime=<n>          "   + _("Number of seconds to keep misbehaving peers from reconnecting (default: 86400)") + "\n" +
        "  -maxreceivebuffer=<n> "   + _("Maximum per-connection receive buffer, <n>*1000 bytes (default: 10000)") + "\n" +
        "  -maxsendbuffer=<n>    "   + _("Maximum per-connection send buffer, <n>*1000 bytes (default: 10000)") + "\n" +
#ifdef USE_UPNP
#if USE_UPNP
        "  -upnp                 "   + _("Use Universal Plug and Play to map the listening port (default: 1)") + "\n" +
#else
        "  -upnp                 "   + _("Use Universal Plug and Play to map the listening port (default: 0)") + "\n" +
#endif
#endif
        "  -detachdb             "   + _("Detach block databases. Increases shutdown time (default: 0)") + "\n" +
        "  -paytxfee=<amt>       "   + _("Fee per KB to add to transactions you send") + "\n" +
#ifdef QT_GUI
        "  -server               "   + _("Accept command line and JSON-RPC commands (enabled on daemon by default)") + "\n" +
#endif
#if !defined(WIN32) && !defined(QT_GUI)
        "  -daemon               "   + _("Run in the background as a daemon and accept commands") + "\n" +
#endif
        "  -testnet              "   + _("Use the test network") + "\n" +
        "  -debug                "   + _("Output extra debugging information. Implies all other -debug* options") + "\n" +
        "  -debugnet             "   + _("Output extra network debugging information") + "\n" +
        "  -logtimestamps        "   + _("Prepend debug output with timestamp") + "\n" +
        "  -printtoconsole       "   + _("Send trace/debug info to console instead of debug.log file") + "\n" +
#ifdef WIN32
        "  -printtodebugger      "   + _("Send trace/debug info to debugger") + "\n" +
#endif
        "  -rpcuser=<user>       "   + _("Username for JSON-RPC connections") + "\n" +
        "  -rpcpassword=<pw>     "   + _("Password for JSON-RPC connections") + "\n" +
        "  -rpcport=<port>       "   + _("Listen for JSON-RPC connections on <port> (default: 8999)") + "\n" +
        "  -rpcallowip=<ip>      "   + _("Allow JSON-RPC connections from specified IP address") + "\n" +
        "  -rpcconnect=<ip>      "   + _("Send commands to node running on <ip> (default: 127.0.0.1)") + "\n" +
        "  -blocknotify=<cmd>    "   + _("Execute command when the best block changes (%s in cmd is replaced by block hash)") + "\n" +
        "  -walletnotify=<cmd>   "   + _("Execute command when a wallet transaction changes (%s in cmd is replaced by TxID)") + "\n" +
        "  -upgradewallet        "   + _("Upgrade wallet to latest format") + "\n" +
        "  -keypool=<n>          "   + _("Set key pool size to <n> (default: 100)") + "\n" +
        "  -rescan               "   + _("Rescan the block chain for missing wallet transactions") + "\n" +
        "  -checkblocks=<n>      "   + _("How many blocks to check at startup (default: 2500, 0 = all)") + "\n" +
        "  -checklevel=<n>       "   + _("How thorough the block verification is (0-6, default: 1)") + "\n";

    strUsage += string() +
        _("\nSSL options: (see the Paycoin Wiki for SSL setup instructions)") + "\n" +
        "  -rpcssl                                  " + _("Use OpenSSL (https) for JSON-RPC connections") + "\n" +
        "  -rpcsslcertificatechainfile=<file.cert>  " + _("Server certificate file (default: server.cert)") + "\n" +
        "  -rpcsslprivatekeyfile=<file.pem>         " + _("Server private key (default: server.pem)") + "\n" +
        "  -rpcsslciphers=<ciphers>                 " + _("Acceptable ciphers (default: TLSv1+HIGH:!SSLv2:!aNULL:!eNULL:!AH:!3DES:@STRENGTH)") + "\n";

    return strUsage;
}

bool AppInit2()
{
    // ********************************************************* Step 1: setup
#ifdef _MSC_VER
    // Turn off Microsoft heap dump noise
    _CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE);
    _CrtSetReportFile(_CRT_WARN, CreateFileA("NUL", GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, 0));
#endif
#if _MSC_VER >= 1400
    // Disable confusing "helpful" text message on abort, Ctrl+C
    _set_abort_behavior(0, _WRITE_ABORT_MSG | _CALL_REPORTFAULT);
#endif
#ifdef WIN32
    // Enable Data Execution Prevention (DEP)
    // Minimum supported OS versions: WinXP SP3, WinVista >= SP1, Win Server 2008
    // A failure is non-critical and needs no further attention!
#ifndef PROCESS_DEP_ENABLE
// We define this here, because GCCs winbase.h limits this to _WIN32_WINNT >= 0x0601 (Windows 7),
// which is not correct. Can be removed, when GCCs winbase.h is fixed!
#define PROCESS_DEP_ENABLE 0x00000001
#endif
    typedef BOOL (WINAPI *PSETPROCDEPPOL)(DWORD);
    PSETPROCDEPPOL setProcDEPPol = (PSETPROCDEPPOL)GetProcAddress(GetModuleHandleA("Kernel32.dll"), "SetProcessDEPPolicy");
    if (setProcDEPPol != NULL) setProcDEPPol(PROCESS_DEP_ENABLE);
#endif
#ifndef WIN32
    umask(077);

    // Clean shutdown on SIGTERM
    struct sigaction sa;
    sa.sa_handler = HandleSIGTERM;
    sigemptyset(&sa.sa_mask);
    sa.sa_flags = 0;
    sigaction(SIGTERM, &sa, NULL);
    sigaction(SIGINT, &sa, NULL);

    // Reopen debug.log on SIGHUP
    struct sigaction sa_hup;
    sa_hup.sa_handler = HandleSIGHUP;
    sigemptyset(&sa_hup.sa_mask);
    sa_hup.sa_flags = 0;
    sigaction(SIGHUP, &sa_hup, NULL);
#endif

    // ********************************************************* Step 2: parameter interactions

    if (mapArgs.count("-connect") && mapMultiArgs["-connect"].size() > 0) {
        SoftSetBoolArg("-dnsseed", false);
        SoftSetBoolArg("-listen", false);
    }

    // even in Tor mode, if -bind is specified, you really want -listen
    if (mapArgs.count("-bind"))
        SoftSetBoolArg("-listen", true);

    bool fTor = (fUseProxy && addrProxy.GetPort() == 9050);
    if (fTor)
    {
        // Use SoftSetBoolArg here so user can override any of these if they wish.
        // Note: the GetBoolArg() calls for all of these must happen later.
        SoftSetBoolArg("-listen", false);
        SoftSetBoolArg("-irc", false);
        SoftSetBoolArg("-proxydns", true);
        SoftSetBoolArg("-upnp", false);
        SoftSetBoolArg("-discover", false);
    }

    if (mapArgs.count("-reservebalance")) // paycoin: reserve balance amount
    {
        int64 nReserveBalance = 0;
        if (!ParseMoney(mapArgs["-reservebalance"], nReserveBalance))
            return InitError(_("Invalid amount for -reservebalance=<amount>"));
    }

    // Not used, semi-depricated; debating removal....
    if (mapArgs.count("-checkpointkey")) // paycoin: checkpoint master priv key
    {
        if (!Checkpoints::SetCheckpointPrivKey(GetArg("-checkpointkey", "")))
            return InitError(_("Unable to sign checkpoint, wrong checkpointkey?"));
    }

    // ********************************************************* Step 3: parameter-to-internal-flags

    fDebug = GetBoolArg("-debug");
    bitdb.SetDetach(GetBoolArg("-detachdb", false));

#if !defined(WIN32) && !defined(QT_GUI)
    fDaemon = GetBoolArg("-daemon");
#else
    fDaemon = false;
#endif

    if (fDaemon)
        fServer = true;
    else
        fServer = GetBoolArg("-server");

    /* force fServer when running without GUI */
#if !defined(QT_GUI)
    fServer = true;
#endif
    fPrintToConsole = GetBoolArg("-printtoconsole");
    fPrintToDebugger = GetBoolArg("-printtodebugger");
    fLogTimestamps = GetBoolArg("-logtimestamps");

    if (mapArgs.count("-timeout"))
    {
        int nNewTimeout = GetArg("-timeout", 5000);
        if (nNewTimeout > 0 && nNewTimeout < 600000)
            nConnectTimeout = nNewTimeout;
    }

    // Continue to put "/P2SH/" in the coinbase to monitor
    // BIP16 support.
    // This can be removed eventually...
    const char* pszP2SH = "/P2SH/";
    COINBASE_FLAGS << std::vector<unsigned char>(pszP2SH, pszP2SH+strlen(pszP2SH));

    if (mapArgs.count("-paytxfee"))
    {
        if (!ParseMoney(mapArgs["-paytxfee"], nTransactionFee) || nTransactionFee < MIN_TX_FEE)
            return InitError(strprintf(_("Invalid amount for -paytxfee=<amount>: '%s'"), mapArgs["-paytxfee"].c_str()));

        if (nTransactionFee > 0.25 * COIN)
            InitWarning(_("Warning: -paytxfee is set very high.  This is the transaction fee you will pay if you send a transaction."));
    }

    // ********************************************************* Step 4: application initialization: dir lock, daemonize, pidfile, debug log

    // Make sure only a single Paycoin process is using the data directory.
    boost::filesystem::path pathLockFile = GetDataDir() / ".lock";
    FILE* file = fopen(pathLockFile.string().c_str(), "a"); // empty lock file; created if it doesn't exist.
    if (file) fclose(file);
    static boost::interprocess::file_lock lock(pathLockFile.string().c_str());
    if (!lock.try_lock())
        return InitError(strprintf(_("Cannot obtain a lock on data directory %s.  Paycoin is probably already running."), GetDataDir().string().c_str()));

#if !defined(WIN32) && !defined(QT_GUI)
    if (fDaemon)
    {
        // Daemonize
        pid_t pid = fork();
        if (pid < 0)
        {
            fprintf(stderr, "Error: fork() returned %d errno %d\n", pid, errno);
            return false;
        }
        if (pid > 0)
        {
            CreatePidFile(GetPidFile(), pid);
            return true;
        }

        pid_t sid = setsid();
        if (sid < 0)
            fprintf(stderr, "Error: setsid() returned %d errno %d\n", sid, errno);
    }
#endif

    if (GetBoolArg("-shrinkdebugfile", !fDebug))
        ShrinkDebugFile();
    printf("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
    printf("Paycoin version %s (%s)\n", FormatFullVersion().c_str(), CLIENT_DATE.c_str());
    printf("Using OpenSSL version %s\n", SSLeay_version(SSLEAY_VERSION));
    printf("Startup time: %s\n", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
    printf("Default data directory %s\n", GetDefaultDataDir().string().c_str());
    printf("Used data directory %s\n", GetDataDir().string().c_str());

    // Check and update minium version protocol after a given time.
    if (time(NULL) >= MICROPRIMES_STAGGER_DOWN)
        MIN_PROTO_VERSION = 70006;

    std::ostringstream strErrors;
    //
    // Load data files
    //
    if (fDaemon)
        fprintf(stdout, "Paycoin server starting\n");
    int64 nStart;

    // ********************************************************* Step 5: network initialization

    if (mapArgs.count("-proxy"))
    {
        fUseProxy = true;
        addrProxy = CService(mapArgs["-proxy"], 9050);
        if (!addrProxy.IsValid())
            return InitError(strprintf(_("Invalid -proxy address: '%s'"), mapArgs["-proxy"].c_str()));
    }

    if (mapArgs.count("-noproxy"))
    {
        BOOST_FOREACH(std::string snet, mapMultiArgs["-noproxy"]) {
            enum Network net = ParseNetwork(snet);
            if (net == NET_UNROUTABLE)
                return InitError(strprintf(_("Unknown network specified in -noproxy: '%s'"), snet.c_str()));

            SetNoProxy(net);
        }
    }

    fNameLookup = GetBoolArg("-dns");
    fProxyNameLookup = GetBoolArg("-proxydns");
    if (fProxyNameLookup)
        fNameLookup = true;
    fNoListen = !GetBoolArg("-listen", true);
    nSocksVersion = GetArg("-socks", 5);
    if (nSocksVersion != 4 && nSocksVersion != 5)
        return InitError(strprintf(_("Unknown -socks proxy version requested: %i"), nSocksVersion));

    if (mapArgs.count("-onlynet")) {
        std::set<enum Network> nets;
        BOOST_FOREACH(std::string snet, mapMultiArgs["-onlynet"]) {
            enum Network net = ParseNetwork(snet);
            if (net == NET_UNROUTABLE) {
                ThreadSafeMessageBox(_("Unknown network specified in -onlynet"), _("Paycoin"), wxOK | wxMODAL);
                return false;
            }
            nets.insert(net);
        }
        for (int n = 0; n < NET_MAX; n++) {
            enum Network net = (enum Network)n;
            if (!nets.count(net))
                SetLimited(net);
        }
    }

    BOOST_FOREACH(string strDest, mapMultiArgs["-seednode"])
        AddOneShot(strDest);

    bool fBound = false;
    if (!fNoListen)
    {
        std::string strError;
        if (mapArgs.count("-bind")) {
            BOOST_FOREACH(std::string strBind, mapMultiArgs["-bind"]) {
                CService addrBind(strBind, GetListenPort(), false);
                if (!addrBind.IsValid())
                    return InitError(strprintf(_("Cannot resolve -bind address: '%s'"), strBind.c_str()));

                fBound |= Bind(addrBind);
            }
        } else {
            struct in_addr inaddr_any;
            inaddr_any.s_addr = INADDR_ANY;
            fBound |= Bind(CService(inaddr_any, GetListenPort()));
#ifdef USE_IPV6
            fBound |= Bind(CService(in6addr_any, GetListenPort()));
#endif
        }
        if (!fBound)
            return false;
    }

    if (mapArgs.count("-externalip"))
    {
        BOOST_FOREACH(string strAddr, mapMultiArgs["-externalip"]) {
            CService addrLocal(strAddr, GetListenPort(), fNameLookup);
            if (!addrLocal.IsValid())
                return InitError(strprintf(_("Cannot resolve -externalip address: '%s'"), strAddr.c_str()));

            AddLocal(CNetAddr(strAddr, fNameLookup), LOCAL_MANUAL);
        }
    }

    // ********************************************************* Step 6: load blockchain

    if (GetBoolArg("-loadblockindextest"))
    {
        CTxDB txdb("r");
        txdb.LoadBlockIndex();
        PrintBlockTree();
        return false;
    }

    InitMessage(_("Loading addresses..."));
    printf("Loading addresses...\n");
    nStart = GetTimeMillis();

    {
        CAddrDB adb;
        if (!adb.Read(addrman))
            printf("Invalid or missing peers.dat; recreating\n");
    }

    InitMessage(_("Loading block index..."));
    printf("Loading block index...\n");
    nStart = GetTimeMillis();
    if (!LoadBlockIndex())
        strErrors << _("Error loading blkindex.dat") << "\n";

    // as LoadBlockIndex can take several minutes, it's possible the user
    // requested to kill bitcoin-qt during the last operation. If so, exit.
    // As the program has not fully started yet, Shutdown() is possibly overkill.
    if (fRequestShutdown)
    {
        printf("Shutdown requested. Exiting.\n");
        return false;
    }
    printf(" block index %15"PRI64d"ms\n", GetTimeMillis() - nStart);

    if (GetBoolArg("-printblockindex") || GetBoolArg("-printblocktree"))
    {
        PrintBlockTree();
        return false;
    }

    if (mapArgs.count("-printblock"))
    {
        string strMatch = mapArgs["-printblock"];
        int nFound = 0;
        for (map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.begin(); mi != mapBlockIndex.end(); ++mi)
        {
            uint256 hash = (*mi).first;
            if (strncmp(hash.ToString().c_str(), strMatch.c_str(), strMatch.size()) == 0)
            {
                CBlockIndex* pindex = (*mi).second;
                CBlock block;
                block.ReadFromDisk(pindex);
                block.BuildMerkleTree();
                block.print();
                printf("\n");
                nFound++;
            }
        }
        if (nFound == 0)
            printf("No blocks matching %s were found\n", strMatch.c_str());
        return false;
    }

    // ********************************************************* Step 7: load wallet

    InitMessage(_("Loading wallet..."));
    printf("Loading wallet...\n");
    nStart = GetTimeMillis();
    bool fFirstRun;
    pwalletMain = new CWallet("wallet.dat");
    int nLoadWalletRet = pwalletMain->LoadWallet(fFirstRun);
    if (nLoadWalletRet != DB_LOAD_OK)
    {
        if (nLoadWalletRet == DB_CORRUPT)
            strErrors << _("Error loading wallet.dat: Wallet corrupted") << "\n";
        else if (nLoadWalletRet == DB_TOO_NEW)
            strErrors << _("Error loading wallet.dat: Wallet requires newer version of Paycoin") << "\n";
        else if (nLoadWalletRet == DB_NEED_REWRITE)
        {
            strErrors << _("Wallet needed to be rewritten: restart Paycoin to complete") << "\n";
            printf("%s", strErrors.str().c_str());
            return InitError(strErrors.str());
        }
        else
            strErrors << _("Error loading wallet.dat") << "\n";
    }

    if (GetBoolArg("-upgradewallet", fFirstRun))
    {
        int nMaxVersion = GetArg("-upgradewallet", 0);
        if (nMaxVersion == 0) // the -upgradewallet without argument case
        {
            printf("Performing wallet upgrade to %i\n", FEATURE_LATEST);
            nMaxVersion = CLIENT_VERSION;
            pwalletMain->SetMinVersion(FEATURE_LATEST); // permanently upgrade the wallet immediately
        }
        else
            printf("Allowing wallet upgrade up to %i\n", nMaxVersion);
        if (nMaxVersion < pwalletMain->GetVersion())
            strErrors << _("Cannot downgrade wallet") << "\n";
        pwalletMain->SetMaxVersion(nMaxVersion);
    }

    if (fFirstRun)
    {
        // Create new keyUser and set as default key
        RandAddSeedPerfmon();

        CPubKey newDefaultKey;
        if (!pwalletMain->GetKeyFromPool(newDefaultKey, false))
            strErrors << _("Cannot initialize keypool") << "\n";
        pwalletMain->SetDefaultKey(newDefaultKey);
        if (!pwalletMain->SetAddressBookName(pwalletMain->vchDefaultKey.GetID(), ""))
            strErrors << _("Cannot write default address") << "\n";
    }

    printf("%s", strErrors.str().c_str());
    printf(" wallet      %15"PRI64d"ms\n", GetTimeMillis() - nStart);

    RegisterWallet(pwalletMain);

    CBlockIndex *pindexRescan = pindexBest;
    if (GetBoolArg("-rescan"))
        pindexRescan = pindexGenesisBlock;
    else
    {
        CWalletDB walletdb("wallet.dat");
        CBlockLocator locator;
        if (walletdb.ReadBestBlock(locator))
            pindexRescan = locator.GetBlockIndex();
    }
    if (pindexBest != pindexRescan && pindexBest && pindexRescan && pindexBest->nHeight > pindexRescan->nHeight)
    {
        InitMessage(_("Rescanning..."));
        printf("Rescanning last %i blocks (from block %i)...\n", pindexBest->nHeight - pindexRescan->nHeight, pindexRescan->nHeight);
        nStart = GetTimeMillis();
        pwalletMain->ScanForWalletTransactions(pindexRescan, true);
        printf(" rescan      %15"PRI64d"ms\n", GetTimeMillis() - nStart);
    }

    // ********************************************************* Step 8: load peers

    printf("Loaded %i addresses from peers.dat %"PRI64d"ms\n",
           addrman.size(), GetTimeMillis() - nStart);

    // ********************************************************* Step 9: load primenode and scrape databases

    InitMessage(_("Loading prime nodes..."));
    printf("Loading prime nodes...");
    nStart = GetTimeMillis();
    /* Handle primenode keys on start to confirm their validity.
     * If it fails for any reason prompt with a QT friendly message. */
    string ret;
    if (!initPrimeNodes(ret)) {
        strErrors << ret << "\n";
    } else if (!ret.empty()) {
        InitMessage(ret);
        printf("%s\n", ret.c_str());
    }
    printf(" prime nodes %15"PRI64d"ms\n", GetTimeMillis() - nStart);

    InitMessage(_("Loading scrapes..."));
    printf("Loading scrapes...\n");
    nStart = GetTimeMillis();
    scrapesDB = new CScrapesDB("cw");
    printf(" scrapes     %15"PRI64d"ms\n", GetTimeMillis() - nStart);

    // ********************************************************* Step 10: start node

    if (!CheckDiskSpace())
        return false;

    RandAddSeedPerfmon();

    //// debug print
    printf("mapBlockIndex.size() = %d\n",   mapBlockIndex.size());
    printf("nBestHeight = %d\n",            nBestHeight);
    printf("setKeyPool.size() = %d\n",      pwalletMain->setKeyPool.size());
    printf("mapWallet.size() = %d\n",       pwalletMain->mapWallet.size());
    printf("mapAddressBook.size() = %d\n",  pwalletMain->mapAddressBook.size());

    if (!strErrors.str().empty())
        return InitError(strErrors.str());

    if (!NewThread(StartNode, NULL))
        InitError(_("Error: could not start node"));

    if (fServer)
        NewThread(ThreadRPCServer, NULL);

    // ********************************************************* Step 11: finished

    InitMessage(_("Done loading"));
    printf("Done loading\n");

    // Add wallet transactions that aren't already in a block to mapTransactions
    pwalletMain->ReacceptWalletTransactions();

#if !defined(QT_GUI)
    // Loop until process is exit()ed from shutdown() function,
    // called from ThreadRPCServer thread when a "stop command is received."
    while (1)
        Sleep(5000);
#endif

    return true;
}