Fix CRLF

1 files changed, 1423 insertions, 1423 deletions

diff --git a/main.h b/main.h
index d8f257b7df..8692579f63 100644
--- a/main.h
+++ b/main.h
@@ -1,1423 +1,1423 @@
-// Copyright (c) 2009-2010 Satoshi Nakamoto

-// Distributed under the MIT/X11 software license, see the accompanying

-// file license.txt or http://www.opensource.org/licenses/mit-license.php.

-

-class COutPoint;

-class CInPoint;

-class CDiskTxPos;

-class CCoinBase;

-class CTxIn;

-class CTxOut;

-class CTransaction;

-class CBlock;

-class CBlockIndex;

-class CWalletTx;

-class CKeyItem;

-

-static const unsigned int MAX_SIZE = 0x02000000;

-static const int64 COIN = 100000000;

-static const int64 CENT = 1000000;

-static const int COINBASE_MATURITY = 100;

-

-static const CBigNum bnProofOfWorkLimit(~uint256(0) >> 32);

-

-

-

-

-

-

-extern CCriticalSection cs_main;

-extern map<uint256, CBlockIndex*> mapBlockIndex;

-extern const uint256 hashGenesisBlock;

-extern CBlockIndex* pindexGenesisBlock;

-extern int nBestHeight;

-extern uint256 hashBestChain;

-extern CBlockIndex* pindexBest;

-extern unsigned int nTransactionsUpdated;

-extern map<uint256, int> mapRequestCount;

-extern CCriticalSection cs_mapRequestCount;

-extern map<string, string> mapAddressBook;

-extern CCriticalSection cs_mapAddressBook;

-extern vector<unsigned char> vchDefaultKey;

-

-// Settings

-extern int fGenerateBitcoins;

-extern int64 nTransactionFee;

-extern CAddress addrIncoming;

-extern int fLimitProcessors;

-extern int nLimitProcessors;

-extern int fMinimizeToTray;

-extern int fMinimizeOnClose;

-

-

-

-

-

-

-

-bool CheckDiskSpace(int64 nAdditionalBytes=0);

-FILE* OpenBlockFile(unsigned int nFile, unsigned int nBlockPos, const char* pszMode="rb");

-FILE* AppendBlockFile(unsigned int& nFileRet);

-bool AddKey(const CKey& key);

-vector<unsigned char> GenerateNewKey();

-bool AddToWallet(const CWalletTx& wtxIn);

-void WalletUpdateSpent(const COutPoint& prevout);

-void ReacceptWalletTransactions();

-bool LoadBlockIndex(bool fAllowNew=true);

-void PrintBlockTree();

-bool ProcessMessages(CNode* pfrom);

-bool ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv);

-bool SendMessages(CNode* pto, bool fSendTrickle);

-int64 GetBalance();

-bool CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CKey& keyRet, int64& nFeeRequiredRet);

-bool CommitTransaction(CWalletTx& wtxNew, const CKey& key);

-bool BroadcastTransaction(CWalletTx& wtxNew);

-string SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee=false);

-string SendMoneyToBitcoinAddress(string strAddress, int64 nValue, CWalletTx& wtxNew, bool fAskFee=false);

-void GenerateBitcoins(bool fGenerate);

-void ThreadBitcoinMiner(void* parg);

-void BitcoinMiner();

-

-

-

-

-

-

-

-

-

-

-

-

-class CDiskTxPos

-{

-public:

-    unsigned int nFile;

-    unsigned int nBlockPos;

-    unsigned int nTxPos;

-

-    CDiskTxPos()

-    {

-        SetNull();

-    }

-

-    CDiskTxPos(unsigned int nFileIn, unsigned int nBlockPosIn, unsigned int nTxPosIn)

-    {

-        nFile = nFileIn;

-        nBlockPos = nBlockPosIn;

-        nTxPos = nTxPosIn;

-    }

-

-    IMPLEMENT_SERIALIZE( READWRITE(FLATDATA(*this)); )

-    void SetNull() { nFile = -1; nBlockPos = 0; nTxPos = 0; }

-    bool IsNull() const { return (nFile == -1); }

-

-    friend bool operator==(const CDiskTxPos& a, const CDiskTxPos& b)

-    {

-        return (a.nFile     == b.nFile &&

-                a.nBlockPos == b.nBlockPos &&

-                a.nTxPos    == b.nTxPos);

-    }

-

-    friend bool operator!=(const CDiskTxPos& a, const CDiskTxPos& b)

-    {

-        return !(a == b);

-    }

-

-    string ToString() const

-    {

-        if (IsNull())

-            return strprintf("null");

-        else

-            return strprintf("(nFile=%d, nBlockPos=%d, nTxPos=%d)", nFile, nBlockPos, nTxPos);

-    }

-

-    void print() const

-    {

-        printf("%s", ToString().c_str());

-    }

-};

-

-

-

-

-class CInPoint

-{

-public:

-    CTransaction* ptx;

-    unsigned int n;

-

-    CInPoint() { SetNull(); }

-    CInPoint(CTransaction* ptxIn, unsigned int nIn) { ptx = ptxIn; n = nIn; }

-    void SetNull() { ptx = NULL; n = -1; }

-    bool IsNull() const { return (ptx == NULL && n == -1); }

-};

-

-

-

-

-class COutPoint

-{

-public:

-    uint256 hash;

-    unsigned int n;

-

-    COutPoint() { SetNull(); }

-    COutPoint(uint256 hashIn, unsigned int nIn) { hash = hashIn; n = nIn; }

-    IMPLEMENT_SERIALIZE( READWRITE(FLATDATA(*this)); )

-    void SetNull() { hash = 0; n = -1; }

-    bool IsNull() const { return (hash == 0 && n == -1); }

-

-    friend bool operator<(const COutPoint& a, const COutPoint& b)

-    {

-        return (a.hash < b.hash || (a.hash == b.hash && a.n < b.n));

-    }

-

-    friend bool operator==(const COutPoint& a, const COutPoint& b)

-    {

-        return (a.hash == b.hash && a.n == b.n);

-    }

-

-    friend bool operator!=(const COutPoint& a, const COutPoint& b)

-    {

-        return !(a == b);

-    }

-

-    string ToString() const

-    {

-        return strprintf("COutPoint(%s, %d)", hash.ToString().substr(0,6).c_str(), n);

-    }

-

-    void print() const

-    {

-        printf("%s\n", ToString().c_str());

-    }

-};

-

-

-

-

-//

-// An input of a transaction.  It contains the location of the previous

-// transaction's output that it claims and a signature that matches the

-// output's public key.

-//

-class CTxIn

-{

-public:

-    COutPoint prevout;

-    CScript scriptSig;

-    unsigned int nSequence;

-

-    CTxIn()

-    {

-        nSequence = UINT_MAX;

-    }

-

-    explicit CTxIn(COutPoint prevoutIn, CScript scriptSigIn=CScript(), unsigned int nSequenceIn=UINT_MAX)

-    {

-        prevout = prevoutIn;

-        scriptSig = scriptSigIn;

-        nSequence = nSequenceIn;

-    }

-

-    CTxIn(uint256 hashPrevTx, unsigned int nOut, CScript scriptSigIn=CScript(), unsigned int nSequenceIn=UINT_MAX)

-    {

-        prevout = COutPoint(hashPrevTx, nOut);

-        scriptSig = scriptSigIn;

-        nSequence = nSequenceIn;

-    }

-

-    IMPLEMENT_SERIALIZE

-    (

-        READWRITE(prevout);

-        READWRITE(scriptSig);

-        READWRITE(nSequence);

-    )

-

-    bool IsFinal() const

-    {

-        return (nSequence == UINT_MAX);

-    }

-

-    friend bool operator==(const CTxIn& a, const CTxIn& b)

-    {

-        return (a.prevout   == b.prevout &&

-                a.scriptSig == b.scriptSig &&

-                a.nSequence == b.nSequence);

-    }

-

-    friend bool operator!=(const CTxIn& a, const CTxIn& b)

-    {

-        return !(a == b);

-    }

-

-    string ToString() const

-    {

-        string str;

-        str += strprintf("CTxIn(");

-        str += prevout.ToString();

-        if (prevout.IsNull())

-            str += strprintf(", coinbase %s", HexStr(scriptSig.begin(), scriptSig.end(), false).c_str());

-        else

-            str += strprintf(", scriptSig=%s", scriptSig.ToString().substr(0,24).c_str());

-        if (nSequence != UINT_MAX)

-            str += strprintf(", nSequence=%u", nSequence);

-        str += ")";

-        return str;

-    }

-

-    void print() const

-    {

-        printf("%s\n", ToString().c_str());

-    }

-

-    bool IsMine() const;

-    int64 GetDebit() const;

-};

-

-

-

-

-//

-// An output of a transaction.  It contains the public key that the next input

-// must be able to sign with to claim it.

-//

-class CTxOut

-{

-public:

-    int64 nValue;

-    CScript scriptPubKey;

-

-public:

-    CTxOut()

-    {

-        SetNull();

-    }

-

-    CTxOut(int64 nValueIn, CScript scriptPubKeyIn)

-    {

-        nValue = nValueIn;

-        scriptPubKey = scriptPubKeyIn;

-    }

-

-    IMPLEMENT_SERIALIZE

-    (

-        READWRITE(nValue);

-        READWRITE(scriptPubKey);

-    )

-

-    void SetNull()

-    {

-        nValue = -1;

-        scriptPubKey.clear();

-    }

-

-    bool IsNull()

-    {

-        return (nValue == -1);

-    }

-

-    uint256 GetHash() const

-    {

-        return SerializeHash(*this);

-    }

-

-    bool IsMine() const

-    {

-        return ::IsMine(scriptPubKey);

-    }

-

-    int64 GetCredit() const

-    {

-        if (IsMine())

-            return nValue;

-        return 0;

-    }

-

-    friend bool operator==(const CTxOut& a, const CTxOut& b)

-    {

-        return (a.nValue       == b.nValue &&

-                a.scriptPubKey == b.scriptPubKey);

-    }

-

-    friend bool operator!=(const CTxOut& a, const CTxOut& b)

-    {

-        return !(a == b);

-    }

-

-    string ToString() const

-    {

-        if (scriptPubKey.size() < 6)

-            return "CTxOut(error)";

-        return strprintf("CTxOut(nValue=%"PRI64d".%08"PRI64d", scriptPubKey=%s)", nValue / COIN, nValue % COIN, scriptPubKey.ToString().substr(0,24).c_str());

-    }

-

-    void print() const

-    {

-        printf("%s\n", ToString().c_str());

-    }

-};

-

-

-

-

-//

-// The basic transaction that is broadcasted on the network and contained in

-// blocks.  A transaction can contain multiple inputs and outputs.

-//

-class CTransaction

-{

-public:

-    int nVersion;

-    vector<CTxIn> vin;

-    vector<CTxOut> vout;

-    unsigned int nLockTime;

-

-

-    CTransaction()

-    {

-        SetNull();

-    }

-

-    IMPLEMENT_SERIALIZE

-    (

-        READWRITE(this->nVersion);

-        nVersion = this->nVersion;

-        READWRITE(vin);

-        READWRITE(vout);

-        READWRITE(nLockTime);

-    )

-

-    void SetNull()

-    {

-        nVersion = 1;

-        vin.clear();

-        vout.clear();

-        nLockTime = 0;

-    }

-

-    bool IsNull() const

-    {

-        return (vin.empty() && vout.empty());

-    }

-

-    uint256 GetHash() const

-    {

-        return SerializeHash(*this);

-    }

-

-    bool IsFinal(int64 nBlockTime=0) const

-    {

-        // Time based nLockTime implemented in 0.1.6,

-        // do not use time based until most 0.1.5 nodes have upgraded.

-        if (nLockTime == 0)

-            return true;

-        if (nBlockTime == 0)

-            nBlockTime = GetAdjustedTime();

-        if (nLockTime < (nLockTime < 500000000 ? nBestHeight : nBlockTime))

-            return true;

-        foreach(const CTxIn& txin, vin)

-            if (!txin.IsFinal())

-                return false;

-        return true;

-    }

-

-    bool IsNewerThan(const CTransaction& old) const

-    {

-        if (vin.size() != old.vin.size())

-            return false;

-        for (int i = 0; i < vin.size(); i++)

-            if (vin[i].prevout != old.vin[i].prevout)

-                return false;

-

-        bool fNewer = false;

-        unsigned int nLowest = UINT_MAX;

-        for (int i = 0; i < vin.size(); i++)

-        {

-            if (vin[i].nSequence != old.vin[i].nSequence)

-            {

-                if (vin[i].nSequence <= nLowest)

-                {

-                    fNewer = false;

-                    nLowest = vin[i].nSequence;

-                }

-                if (old.vin[i].nSequence < nLowest)

-                {

-                    fNewer = true;

-                    nLowest = old.vin[i].nSequence;

-                }

-            }

-        }

-        return fNewer;

-    }

-

-    bool IsCoinBase() const

-    {

-        return (vin.size() == 1 && vin[0].prevout.IsNull());

-    }

-

-    bool CheckTransaction() const

-    {

-        // Basic checks that don't depend on any context

-        if (vin.empty() || vout.empty())

-            return error("CTransaction::CheckTransaction() : vin or vout empty");

-

-        // Check for negative values

-        foreach(const CTxOut& txout, vout)

-            if (txout.nValue < 0)

-                return error("CTransaction::CheckTransaction() : txout.nValue negative");

-

-        if (IsCoinBase())

-        {

-            if (vin[0].scriptSig.size() < 2 || vin[0].scriptSig.size() > 100)

-                return error("CTransaction::CheckTransaction() : coinbase script size");

-        }

-        else

-        {

-            foreach(const CTxIn& txin, vin)

-                if (txin.prevout.IsNull())

-                    return error("CTransaction::CheckTransaction() : prevout is null");

-        }

-

-        return true;

-    }

-

-    bool IsMine() const

-    {

-        foreach(const CTxOut& txout, vout)

-            if (txout.IsMine())

-                return true;

-        return false;

-    }

-

-    int64 GetDebit() const

-    {

-        int64 nDebit = 0;

-        foreach(const CTxIn& txin, vin)

-            nDebit += txin.GetDebit();

-        return nDebit;

-    }

-

-    int64 GetCredit() const

-    {

-        int64 nCredit = 0;

-        foreach(const CTxOut& txout, vout)

-            nCredit += txout.GetCredit();

-        return nCredit;

-    }

-

-    int64 GetValueOut() const

-    {

-        int64 nValueOut = 0;

-        foreach(const CTxOut& txout, vout)

-        {

-            if (txout.nValue < 0)

-                throw runtime_error("CTransaction::GetValueOut() : negative value");

-            nValueOut += txout.nValue;

-        }

-        return nValueOut;

-    }

-

-    int64 GetMinFee(unsigned int nBlockSize=1) const

-    {

-        // Base fee is 1 cent per kilobyte

-        unsigned int nBytes = ::GetSerializeSize(*this, SER_NETWORK);

-        int64 nMinFee = (1 + (int64)nBytes / 1000) * CENT;

-

-        // Transactions under 60K are free as long as block size is under 80K

-        // (about 27,000bc if made of 50bc inputs)

-        if (nBytes < 60000 && nBlockSize < 80000)

-            nMinFee = 0;

-

-        // Transactions under 3K are free as long as block size is under 200K

-        if (nBytes < 3000 && nBlockSize < 200000)

-            nMinFee = 0;

-

-        // To limit dust spam, require a 0.01 fee if any output is less than 0.01

-        if (nMinFee < CENT)

-            foreach(const CTxOut& txout, vout)

-                if (txout.nValue < CENT)

-                    nMinFee = CENT;

-

-        return nMinFee;

-    }

-

-

-

-    bool ReadFromDisk(CDiskTxPos pos, FILE** pfileRet=NULL)

-    {

-        CAutoFile filein = OpenBlockFile(pos.nFile, 0, pfileRet ? "rb+" : "rb");

-        if (!filein)

-            return error("CTransaction::ReadFromDisk() : OpenBlockFile failed");

-

-        // Read transaction

-        if (fseek(filein, pos.nTxPos, SEEK_SET) != 0)

-            return error("CTransaction::ReadFromDisk() : fseek failed");

-        filein >> *this;

-

-        // Return file pointer

-        if (pfileRet)

-        {

-            if (fseek(filein, pos.nTxPos, SEEK_SET) != 0)

-                return error("CTransaction::ReadFromDisk() : second fseek failed");

-            *pfileRet = filein.release();

-        }

-        return true;

-    }

-

-

-    friend bool operator==(const CTransaction& a, const CTransaction& b)

-    {

-        return (a.nVersion  == b.nVersion &&

-                a.vin       == b.vin &&

-                a.vout      == b.vout &&

-                a.nLockTime == b.nLockTime);

-    }

-

-    friend bool operator!=(const CTransaction& a, const CTransaction& b)

-    {

-        return !(a == b);

-    }

-

-

-    string ToString() const

-    {

-        string str;

-        str += strprintf("CTransaction(hash=%s, ver=%d, vin.size=%d, vout.size=%d, nLockTime=%d)\n",

-            GetHash().ToString().substr(0,6).c_str(),

-            nVersion,

-            vin.size(),

-            vout.size(),

-            nLockTime);

-        for (int i = 0; i < vin.size(); i++)

-            str += "    " + vin[i].ToString() + "\n";

-        for (int i = 0; i < vout.size(); i++)

-            str += "    " + vout[i].ToString() + "\n";

-        return str;

-    }

-

-    void print() const

-    {

-        printf("%s", ToString().c_str());

-    }

-

-

-

-    bool DisconnectInputs(CTxDB& txdb);

-    bool ConnectInputs(CTxDB& txdb, map<uint256, CTxIndex>& mapTestPool, CDiskTxPos posThisTx, int nHeight, int64& nFees, bool fBlock, bool fMiner, int64 nMinFee=0);

-    bool ClientConnectInputs();

-

-    bool AcceptTransaction(CTxDB& txdb, bool fCheckInputs=true, bool* pfMissingInputs=NULL);

-

-    bool AcceptTransaction(bool fCheckInputs=true, bool* pfMissingInputs=NULL)

-    {

-        CTxDB txdb("r");

-        return AcceptTransaction(txdb, fCheckInputs, pfMissingInputs);

-    }

-

-protected:

-    bool AddToMemoryPool();

-public:

-    bool RemoveFromMemoryPool();

-};

-

-

-

-

-

-//

-// A transaction with a merkle branch linking it to the block chain

-//

-class CMerkleTx : public CTransaction

-{

-public:

-    uint256 hashBlock;

-    vector<uint256> vMerkleBranch;

-    int nIndex;

-

-    // memory only

-    mutable bool fMerkleVerified;

-    mutable bool fGetCreditCached;

-    mutable int64 nGetCreditCached;

-

-

-    CMerkleTx()

-    {

-        Init();

-    }

-

-    CMerkleTx(const CTransaction& txIn) : CTransaction(txIn)

-    {

-        Init();

-    }

-

-    void Init()

-    {

-        hashBlock = 0;

-        nIndex = -1;

-        fMerkleVerified = false;

-        fGetCreditCached = false;

-        nGetCreditCached = 0;

-    }

-

-    IMPLEMENT_SERIALIZE

-    (

-        nSerSize += SerReadWrite(s, *(CTransaction*)this, nType, nVersion, ser_action);

-        nVersion = this->nVersion;

-        READWRITE(hashBlock);

-        READWRITE(vMerkleBranch);

-        READWRITE(nIndex);

-    )

-

-    int64 GetCredit(bool fUseCache=false) const

-    {

-        // Must wait until coinbase is safely deep enough in the chain before valuing it

-        if (IsCoinBase() && GetBlocksToMaturity() > 0)

-            return 0;

-

-        // GetBalance can assume transactions in mapWallet won't change

-        if (fUseCache && fGetCreditCached)

-            return nGetCreditCached;

-        nGetCreditCached = CTransaction::GetCredit();

-        fGetCreditCached = true;

-        return nGetCreditCached;

-    }

-

-

-    int SetMerkleBranch(const CBlock* pblock=NULL);

-    int GetDepthInMainChain(int& nHeightRet) const;

-    int GetDepthInMainChain() const { int nHeight; return GetDepthInMainChain(nHeight); }

-    bool IsInMainChain() const { return GetDepthInMainChain() > 0; }

-    int GetBlocksToMaturity() const;

-    bool AcceptTransaction(CTxDB& txdb, bool fCheckInputs=true);

-    bool AcceptTransaction() { CTxDB txdb("r"); return AcceptTransaction(txdb); }

-};

-

-

-

-

-//

-// A transaction with a bunch of additional info that only the owner cares

-// about.  It includes any unrecorded transactions needed to link it back

-// to the block chain.

-//

-class CWalletTx : public CMerkleTx

-{

-public:

-    vector<CMerkleTx> vtxPrev;

-    map<string, string> mapValue;

-    vector<pair<string, string> > vOrderForm;

-    unsigned int fTimeReceivedIsTxTime;

-    unsigned int nTimeReceived;  // time received by this node

-    char fFromMe;

-    char fSpent;

-    //// probably need to sign the order info so know it came from payer

-

-    // memory only UI hints

-    mutable unsigned int nTimeDisplayed;

-    mutable int nLinesDisplayed;

-

-

-    CWalletTx()

-    {

-        Init();

-    }

-

-    CWalletTx(const CMerkleTx& txIn) : CMerkleTx(txIn)

-    {

-        Init();

-    }

-

-    CWalletTx(const CTransaction& txIn) : CMerkleTx(txIn)

-    {

-        Init();

-    }

-

-    void Init()

-    {

-        fTimeReceivedIsTxTime = false;

-        nTimeReceived = 0;

-        fFromMe = false;

-        fSpent = false;

-        nTimeDisplayed = 0;

-        nLinesDisplayed = 0;

-    }

-

-    IMPLEMENT_SERIALIZE

-    (

-        nSerSize += SerReadWrite(s, *(CMerkleTx*)this, nType, nVersion, ser_action);

-        nVersion = this->nVersion;

-        READWRITE(vtxPrev);

-        READWRITE(mapValue);

-        READWRITE(vOrderForm);

-        READWRITE(fTimeReceivedIsTxTime);

-        READWRITE(nTimeReceived);

-        READWRITE(fFromMe);

-        READWRITE(fSpent);

-    )

-

-    bool WriteToDisk()

-    {

-        return CWalletDB().WriteTx(GetHash(), *this);

-    }

-

-

-    int64 GetTxTime() const;

-    int GetRequestCount() const;

-

-    void AddSupportingTransactions(CTxDB& txdb);

-

-    bool AcceptWalletTransaction(CTxDB& txdb, bool fCheckInputs=true);

-    bool AcceptWalletTransaction() { CTxDB txdb("r"); return AcceptWalletTransaction(txdb); }

-

-    void RelayWalletTransaction(CTxDB& txdb);

-    void RelayWalletTransaction() { CTxDB txdb("r"); RelayWalletTransaction(txdb); }

-};

-

-

-

-

-//

-// A txdb record that contains the disk location of a transaction and the

-// locations of transactions that spend its outputs.  vSpent is really only

-// used as a flag, but having the location is very helpful for debugging.

-//

-class CTxIndex

-{

-public:

-    CDiskTxPos pos;

-    vector<CDiskTxPos> vSpent;

-

-    CTxIndex()

-    {

-        SetNull();

-    }

-

-    CTxIndex(const CDiskTxPos& posIn, unsigned int nOutputs)

-    {

-        pos = posIn;

-        vSpent.resize(nOutputs);

-    }

-

-    IMPLEMENT_SERIALIZE

-    (

-        if (!(nType & SER_GETHASH))

-            READWRITE(nVersion);

-        READWRITE(pos);

-        READWRITE(vSpent);

-    )

-

-    void SetNull()

-    {

-        pos.SetNull();

-        vSpent.clear();

-    }

-

-    bool IsNull()

-    {

-        return pos.IsNull();

-    }

-

-    friend bool operator==(const CTxIndex& a, const CTxIndex& b)

-    {

-        if (a.pos != b.pos || a.vSpent.size() != b.vSpent.size())

-            return false;

-        for (int i = 0; i < a.vSpent.size(); i++)

-            if (a.vSpent[i] != b.vSpent[i])

-                return false;

-        return true;

-    }

-

-    friend bool operator!=(const CTxIndex& a, const CTxIndex& b)

-    {

-        return !(a == b);

-    }

-};

-

-

-

-

-

-//

-// Nodes collect new transactions into a block, hash them into a hash tree,

-// and scan through nonce values to make the block's hash satisfy proof-of-work

-// requirements.  When they solve the proof-of-work, they broadcast the block

-// to everyone and the block is added to the block chain.  The first transaction

-// in the block is a special one that creates a new coin owned by the creator

-// of the block.

-//

-// Blocks are appended to blk0001.dat files on disk.  Their location on disk

-// is indexed by CBlockIndex objects in memory.

-//

-class CBlock

-{

-public:

-    // header

-    int nVersion;

-    uint256 hashPrevBlock;

-    uint256 hashMerkleRoot;

-    unsigned int nTime;

-    unsigned int nBits;

-    unsigned int nNonce;

-

-    // network and disk

-    vector<CTransaction> vtx;

-

-    // memory only

-    mutable vector<uint256> vMerkleTree;

-

-

-    CBlock()

-    {

-        SetNull();

-    }

-

-    IMPLEMENT_SERIALIZE

-    (

-        READWRITE(this->nVersion);

-        nVersion = this->nVersion;

-        READWRITE(hashPrevBlock);

-        READWRITE(hashMerkleRoot);

-        READWRITE(nTime);

-        READWRITE(nBits);

-        READWRITE(nNonce);

-

-        // ConnectBlock depends on vtx being last so it can calculate offset

-        if (!(nType & (SER_GETHASH|SER_BLOCKHEADERONLY)))

-            READWRITE(vtx);

-        else if (fRead)

-            const_cast<CBlock*>(this)->vtx.clear();

-    )

-

-    void SetNull()

-    {

-        nVersion = 1;

-        hashPrevBlock = 0;

-        hashMerkleRoot = 0;

-        nTime = 0;

-        nBits = 0;

-        nNonce = 0;

-        vtx.clear();

-        vMerkleTree.clear();

-    }

-

-    bool IsNull() const

-    {

-        return (nBits == 0);

-    }

-

-    uint256 GetHash() const

-    {

-        return Hash(BEGIN(nVersion), END(nNonce));

-    }

-

-

-    uint256 BuildMerkleTree() const

-    {

-        vMerkleTree.clear();

-        foreach(const CTransaction& tx, vtx)

-            vMerkleTree.push_back(tx.GetHash());

-        int j = 0;

-        for (int nSize = vtx.size(); nSize > 1; nSize = (nSize + 1) / 2)

-        {

-            for (int i = 0; i < nSize; i += 2)

-            {

-                int i2 = min(i+1, nSize-1);

-                vMerkleTree.push_back(Hash(BEGIN(vMerkleTree[j+i]),  END(vMerkleTree[j+i]),

-                                           BEGIN(vMerkleTree[j+i2]), END(vMerkleTree[j+i2])));

-            }

-            j += nSize;

-        }

-        return (vMerkleTree.empty() ? 0 : vMerkleTree.back());

-    }

-

-    vector<uint256> GetMerkleBranch(int nIndex) const

-    {

-        if (vMerkleTree.empty())

-            BuildMerkleTree();

-        vector<uint256> vMerkleBranch;

-        int j = 0;

-        for (int nSize = vtx.size(); nSize > 1; nSize = (nSize + 1) / 2)

-        {

-            int i = min(nIndex^1, nSize-1);

-            vMerkleBranch.push_back(vMerkleTree[j+i]);

-            nIndex >>= 1;

-            j += nSize;

-        }

-        return vMerkleBranch;

-    }

-

-    static uint256 CheckMerkleBranch(uint256 hash, const vector<uint256>& vMerkleBranch, int nIndex)

-    {

-        if (nIndex == -1)

-            return 0;

-        foreach(const uint256& otherside, vMerkleBranch)

-        {

-            if (nIndex & 1)

-                hash = Hash(BEGIN(otherside), END(otherside), BEGIN(hash), END(hash));

-            else

-                hash = Hash(BEGIN(hash), END(hash), BEGIN(otherside), END(otherside));

-            nIndex >>= 1;

-        }

-        return hash;

-    }

-

-

-    bool WriteToDisk(bool fWriteTransactions, unsigned int& nFileRet, unsigned int& nBlockPosRet)

-    {

-        // Open history file to append

-        CAutoFile fileout = AppendBlockFile(nFileRet);

-        if (!fileout)

-            return error("CBlock::WriteToDisk() : AppendBlockFile failed");

-        if (!fWriteTransactions)

-            fileout.nType |= SER_BLOCKHEADERONLY;

-

-        // Write index header

-        unsigned int nSize = fileout.GetSerializeSize(*this);

-        fileout << FLATDATA(pchMessageStart) << nSize;

-

-        // Write block

-        nBlockPosRet = ftell(fileout);

-        if (nBlockPosRet == -1)

-            return error("CBlock::WriteToDisk() : ftell failed");

-        fileout << *this;

-

-        // Flush stdio buffers and commit to disk before returning

-        fflush(fileout);

-#ifdef __WXMSW__

-        _commit(_fileno(fileout));

-#else

-        fsync(fileno(fileout));

-#endif

-

-        return true;

-    }

-

-    bool ReadFromDisk(unsigned int nFile, unsigned int nBlockPos, bool fReadTransactions=true)

-    {

-        SetNull();

-

-        // Open history file to read

-        CAutoFile filein = OpenBlockFile(nFile, nBlockPos, "rb");

-        if (!filein)

-            return error("CBlock::ReadFromDisk() : OpenBlockFile failed");

-        if (!fReadTransactions)

-            filein.nType |= SER_BLOCKHEADERONLY;

-

-        // Read block

-        filein >> *this;

-

-        // Check the header

-        if (CBigNum().SetCompact(nBits) > bnProofOfWorkLimit)

-            return error("CBlock::ReadFromDisk() : nBits errors in block header");

-        if (GetHash() > CBigNum().SetCompact(nBits).getuint256())

-            return error("CBlock::ReadFromDisk() : GetHash() errors in block header");

-

-        return true;

-    }

-

-

-

-    void print() const

-    {

-        printf("CBlock(hash=%s, ver=%d, hashPrevBlock=%s, hashMerkleRoot=%s, nTime=%u, nBits=%08x, nNonce=%u, vtx=%d)\n",

-            GetHash().ToString().substr(0,16).c_str(),

-            nVersion,

-            hashPrevBlock.ToString().substr(0,16).c_str(),

-            hashMerkleRoot.ToString().substr(0,6).c_str(),

-            nTime, nBits, nNonce,

-            vtx.size());

-        for (int i = 0; i < vtx.size(); i++)

-        {

-            printf("  ");

-            vtx[i].print();

-        }

-        printf("  vMerkleTree: ");

-        for (int i = 0; i < vMerkleTree.size(); i++)

-            printf("%s ", vMerkleTree[i].ToString().substr(0,6).c_str());

-        printf("\n");

-    }

-

-

-    int64 GetBlockValue(int64 nFees) const;

-    bool DisconnectBlock(CTxDB& txdb, CBlockIndex* pindex);

-    bool ConnectBlock(CTxDB& txdb, CBlockIndex* pindex);

-    bool ReadFromDisk(const CBlockIndex* blockindex, bool fReadTransactions=true);

-    bool AddToBlockIndex(unsigned int nFile, unsigned int nBlockPos);

-    bool CheckBlock() const;

-    bool AcceptBlock();

-};

-

-

-

-

-

-

-//

-// The block chain is a tree shaped structure starting with the

-// genesis block at the root, with each block potentially having multiple

-// candidates to be the next block.  pprev and pnext link a path through the

-// main/longest chain.  A blockindex may have multiple pprev pointing back

-// to it, but pnext will only point forward to the longest branch, or will

-// be null if the block is not part of the longest chain.

-//

-class CBlockIndex

-{

-public:

-    const uint256* phashBlock;

-    CBlockIndex* pprev;

-    CBlockIndex* pnext;

-    unsigned int nFile;

-    unsigned int nBlockPos;

-    int nHeight;

-

-    // block header

-    int nVersion;

-    uint256 hashMerkleRoot;

-    unsigned int nTime;

-    unsigned int nBits;

-    unsigned int nNonce;

-

-

-    CBlockIndex()

-    {

-        phashBlock = NULL;

-        pprev = NULL;

-        pnext = NULL;

-        nFile = 0;

-        nBlockPos = 0;

-        nHeight = 0;

-

-        nVersion       = 0;

-        hashMerkleRoot = 0;

-        nTime          = 0;

-        nBits          = 0;

-        nNonce         = 0;

-    }

-

-    CBlockIndex(unsigned int nFileIn, unsigned int nBlockPosIn, CBlock& block)

-    {

-        phashBlock = NULL;

-        pprev = NULL;

-        pnext = NULL;

-        nFile = nFileIn;

-        nBlockPos = nBlockPosIn;

-        nHeight = 0;

-

-        nVersion       = block.nVersion;

-        hashMerkleRoot = block.hashMerkleRoot;

-        nTime          = block.nTime;

-        nBits          = block.nBits;

-        nNonce         = block.nNonce;

-    }

-

-    uint256 GetBlockHash() const

-    {

-        return *phashBlock;

-    }

-

-    bool IsInMainChain() const

-    {

-        return (pnext || this == pindexBest);

-    }

-

-    bool EraseBlockFromDisk()

-    {

-        // Open history file

-        CAutoFile fileout = OpenBlockFile(nFile, nBlockPos, "rb+");

-        if (!fileout)

-            return false;

-

-        // Overwrite with empty null block

-        CBlock block;

-        block.SetNull();

-        fileout << block;

-

-        return true;

-    }

-

-    enum { nMedianTimeSpan=11 };

-

-    int64 GetMedianTimePast() const

-    {

-        unsigned int pmedian[nMedianTimeSpan];

-        unsigned int* pbegin = &pmedian[nMedianTimeSpan];

-        unsigned int* pend = &pmedian[nMedianTimeSpan];

-

-        const CBlockIndex* pindex = this;

-        for (int i = 0; i < nMedianTimeSpan && pindex; i++, pindex = pindex->pprev)

-            *(--pbegin) = pindex->nTime;

-

-        sort(pbegin, pend);

-        return pbegin[(pend - pbegin)/2];

-    }

-

-    int64 GetMedianTime() const

-    {

-        const CBlockIndex* pindex = this;

-        for (int i = 0; i < nMedianTimeSpan/2; i++)

-        {

-            if (!pindex->pnext)

-                return nTime;

-            pindex = pindex->pnext;

-        }

-        return pindex->GetMedianTimePast();

-    }

-

-

-

-    string ToString() const

-    {

-        return strprintf("CBlockIndex(nprev=%08x, pnext=%08x, nFile=%d, nBlockPos=%-6d nHeight=%d, merkle=%s, hashBlock=%s)",

-            pprev, pnext, nFile, nBlockPos, nHeight,

-            hashMerkleRoot.ToString().substr(0,6).c_str(),

-            GetBlockHash().ToString().substr(0,16).c_str());

-    }

-

-    void print() const

-    {

-        printf("%s\n", ToString().c_str());

-    }

-};

-

-

-

-//

-// Used to marshal pointers into hashes for db storage.

-//

-class CDiskBlockIndex : public CBlockIndex

-{

-public:

-    uint256 hashPrev;

-    uint256 hashNext;

-

-    CDiskBlockIndex()

-    {

-        hashPrev = 0;

-        hashNext = 0;

-    }

-

-    explicit CDiskBlockIndex(CBlockIndex* pindex) : CBlockIndex(*pindex)

-    {

-        hashPrev = (pprev ? pprev->GetBlockHash() : 0);

-        hashNext = (pnext ? pnext->GetBlockHash() : 0);

-    }

-

-    IMPLEMENT_SERIALIZE

-    (

-        if (!(nType & SER_GETHASH))

-            READWRITE(nVersion);

-

-        READWRITE(hashNext);

-        READWRITE(nFile);

-        READWRITE(nBlockPos);

-        READWRITE(nHeight);

-

-        // block header

-        READWRITE(this->nVersion);

-        READWRITE(hashPrev);

-        READWRITE(hashMerkleRoot);

-        READWRITE(nTime);

-        READWRITE(nBits);

-        READWRITE(nNonce);

-    )

-

-    uint256 GetBlockHash() const

-    {

-        CBlock block;

-        block.nVersion        = nVersion;

-        block.hashPrevBlock   = hashPrev;

-        block.hashMerkleRoot  = hashMerkleRoot;

-        block.nTime           = nTime;

-        block.nBits           = nBits;

-        block.nNonce          = nNonce;

-        return block.GetHash();

-    }

-

-

-    string ToString() const

-    {

-        string str = "CDiskBlockIndex(";

-        str += CBlockIndex::ToString();

-        str += strprintf("\n                hashBlock=%s, hashPrev=%s, hashNext=%s)",

-            GetBlockHash().ToString().c_str(),

-            hashPrev.ToString().substr(0,16).c_str(),

-            hashNext.ToString().substr(0,16).c_str());

-        return str;

-    }

-

-    void print() const

-    {

-        printf("%s\n", ToString().c_str());

-    }

-};

-

-

-

-

-

-

-

-

-//

-// Describes a place in the block chain to another node such that if the

-// other node doesn't have the same branch, it can find a recent common trunk.

-// The further back it is, the further before the fork it may be.

-//

-class CBlockLocator

-{

-protected:

-    vector<uint256> vHave;

-public:

-

-    CBlockLocator()

-    {

-    }

-

-    explicit CBlockLocator(const CBlockIndex* pindex)

-    {

-        Set(pindex);

-    }

-

-    explicit CBlockLocator(uint256 hashBlock)

-    {

-        map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);

-        if (mi != mapBlockIndex.end())

-            Set((*mi).second);

-    }

-

-    IMPLEMENT_SERIALIZE

-    (

-        if (!(nType & SER_GETHASH))

-            READWRITE(nVersion);

-        READWRITE(vHave);

-    )

-

-    void Set(const CBlockIndex* pindex)

-    {

-        vHave.clear();

-        int nStep = 1;

-        while (pindex)

-        {

-            vHave.push_back(pindex->GetBlockHash());

-

-            // Exponentially larger steps back

-            for (int i = 0; pindex && i < nStep; i++)

-                pindex = pindex->pprev;

-            if (vHave.size() > 10)

-                nStep *= 2;

-        }

-        vHave.push_back(hashGenesisBlock);

-    }

-

-    int GetDistanceBack()

-    {

-        // Retrace how far back it was in the sender's branch

-        int nDistance = 0;

-        int nStep = 1;

-        foreach(const uint256& hash, vHave)

-        {

-            map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);

-            if (mi != mapBlockIndex.end())

-            {

-                CBlockIndex* pindex = (*mi).second;

-                if (pindex->IsInMainChain())

-                    return nDistance;

-            }

-            nDistance += nStep;

-            if (nDistance > 10)

-                nStep *= 2;

-        }

-        return nDistance;

-    }

-

-    CBlockIndex* GetBlockIndex()

-    {

-        // Find the first block the caller has in the main chain

-        foreach(const uint256& hash, vHave)

-        {

-            map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);

-            if (mi != mapBlockIndex.end())

-            {

-                CBlockIndex* pindex = (*mi).second;

-                if (pindex->IsInMainChain())

-                    return pindex;

-            }

-        }

-        return pindexGenesisBlock;

-    }

-

-    uint256 GetBlockHash()

-    {

-        // Find the first block the caller has in the main chain

-        foreach(const uint256& hash, vHave)

-        {

-            map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);

-            if (mi != mapBlockIndex.end())

-            {

-                CBlockIndex* pindex = (*mi).second;

-                if (pindex->IsInMainChain())

-                    return hash;

-            }

-        }

-        return hashGenesisBlock;

-    }

-

-    int GetHeight()

-    {

-        CBlockIndex* pindex = GetBlockIndex();

-        if (!pindex)

-            return 0;

-        return pindex->nHeight;

-    }

-};

-

-

-

-

-

-

-//

-// Private key that includes an expiration date in case it never gets used.

-//

-class CWalletKey

-{

-public:

-    CPrivKey vchPrivKey;

-    int64 nTimeCreated;

-    int64 nTimeExpires;

-    string strComment;

-    //// todo: add something to note what created it (user, getnewaddress, change)

-    ////   maybe should have a map<string, string> property map

-

-    CWalletKey(int64 nTimeExpiresIn=0)

-    {

-        nTimeCreated = (nTimeExpiresIn ? GetTime() : 0);

-        nTimeExpires = nTimeExpiresIn;

-    }

-

-    IMPLEMENT_SERIALIZE

-    (

-        if (!(nType & SER_GETHASH))

-            READWRITE(nVersion);

-        READWRITE(vchPrivKey);

-        READWRITE(nTimeCreated);

-        READWRITE(nTimeExpires);

-        READWRITE(strComment);

-    )

-};

-

-

-

-

-

-

-extern map<uint256, CTransaction> mapTransactions;

-extern map<uint256, CWalletTx> mapWallet;

-extern vector<uint256> vWalletUpdated;

-extern CCriticalSection cs_mapWallet;

-extern map<vector<unsigned char>, CPrivKey> mapKeys;

-extern map<uint160, vector<unsigned char> > mapPubKeys;

-extern CCriticalSection cs_mapKeys;

-extern CKey keyUser;

+// Copyright (c) 2009-2010 Satoshi Nakamoto
+// Distributed under the MIT/X11 software license, see the accompanying
+// file license.txt or http://www.opensource.org/licenses/mit-license.php.
+
+class COutPoint;
+class CInPoint;
+class CDiskTxPos;
+class CCoinBase;
+class CTxIn;
+class CTxOut;
+class CTransaction;
+class CBlock;
+class CBlockIndex;
+class CWalletTx;
+class CKeyItem;
+
+static const unsigned int MAX_SIZE = 0x02000000;
+static const int64 COIN = 100000000;
+static const int64 CENT = 1000000;
+static const int COINBASE_MATURITY = 100;
+
+static const CBigNum bnProofOfWorkLimit(~uint256(0) >> 32);
+
+
+
+
+
+
+extern CCriticalSection cs_main;
+extern map<uint256, CBlockIndex*> mapBlockIndex;
+extern const uint256 hashGenesisBlock;
+extern CBlockIndex* pindexGenesisBlock;
+extern int nBestHeight;
+extern uint256 hashBestChain;
+extern CBlockIndex* pindexBest;
+extern unsigned int nTransactionsUpdated;
+extern map<uint256, int> mapRequestCount;
+extern CCriticalSection cs_mapRequestCount;
+extern map<string, string> mapAddressBook;
+extern CCriticalSection cs_mapAddressBook;
+extern vector<unsigned char> vchDefaultKey;
+
+// Settings
+extern int fGenerateBitcoins;
+extern int64 nTransactionFee;
+extern CAddress addrIncoming;
+extern int fLimitProcessors;
+extern int nLimitProcessors;
+extern int fMinimizeToTray;
+extern int fMinimizeOnClose;
+
+
+
+
+
+
+
+bool CheckDiskSpace(int64 nAdditionalBytes=0);
+FILE* OpenBlockFile(unsigned int nFile, unsigned int nBlockPos, const char* pszMode="rb");
+FILE* AppendBlockFile(unsigned int& nFileRet);
+bool AddKey(const CKey& key);
+vector<unsigned char> GenerateNewKey();
+bool AddToWallet(const CWalletTx& wtxIn);
+void WalletUpdateSpent(const COutPoint& prevout);
+void ReacceptWalletTransactions();
+bool LoadBlockIndex(bool fAllowNew=true);
+void PrintBlockTree();
+bool ProcessMessages(CNode* pfrom);
+bool ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv);
+bool SendMessages(CNode* pto, bool fSendTrickle);
+int64 GetBalance();
+bool CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CKey& keyRet, int64& nFeeRequiredRet);
+bool CommitTransaction(CWalletTx& wtxNew, const CKey& key);
+bool BroadcastTransaction(CWalletTx& wtxNew);
+string SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee=false);
+string SendMoneyToBitcoinAddress(string strAddress, int64 nValue, CWalletTx& wtxNew, bool fAskFee=false);
+void GenerateBitcoins(bool fGenerate);
+void ThreadBitcoinMiner(void* parg);
+void BitcoinMiner();
+
+
+
+
+
+
+
+
+
+
+
+
+class CDiskTxPos
+{
+public:
+    unsigned int nFile;
+    unsigned int nBlockPos;
+    unsigned int nTxPos;
+
+    CDiskTxPos()
+    {
+        SetNull();
+    }
+
+    CDiskTxPos(unsigned int nFileIn, unsigned int nBlockPosIn, unsigned int nTxPosIn)
+    {
+        nFile = nFileIn;
+        nBlockPos = nBlockPosIn;
+        nTxPos = nTxPosIn;
+    }
+
+    IMPLEMENT_SERIALIZE( READWRITE(FLATDATA(*this)); )
+    void SetNull() { nFile = -1; nBlockPos = 0; nTxPos = 0; }
+    bool IsNull() const { return (nFile == -1); }
+
+    friend bool operator==(const CDiskTxPos& a, const CDiskTxPos& b)
+    {
+        return (a.nFile     == b.nFile &&
+                a.nBlockPos == b.nBlockPos &&
+                a.nTxPos    == b.nTxPos);
+    }
+
+    friend bool operator!=(const CDiskTxPos& a, const CDiskTxPos& b)
+    {
+        return !(a == b);
+    }
+
+    string ToString() const
+    {
+        if (IsNull())
+            return strprintf("null");
+        else
+            return strprintf("(nFile=%d, nBlockPos=%d, nTxPos=%d)", nFile, nBlockPos, nTxPos);
+    }
+
+    void print() const
+    {
+        printf("%s", ToString().c_str());
+    }
+};
+
+
+
+
+class CInPoint
+{
+public:
+    CTransaction* ptx;
+    unsigned int n;
+
+    CInPoint() { SetNull(); }
+    CInPoint(CTransaction* ptxIn, unsigned int nIn) { ptx = ptxIn; n = nIn; }
+    void SetNull() { ptx = NULL; n = -1; }
+    bool IsNull() const { return (ptx == NULL && n == -1); }
+};
+
+
+
+
+class COutPoint
+{
+public:
+    uint256 hash;
+    unsigned int n;
+
+    COutPoint() { SetNull(); }
+    COutPoint(uint256 hashIn, unsigned int nIn) { hash = hashIn; n = nIn; }
+    IMPLEMENT_SERIALIZE( READWRITE(FLATDATA(*this)); )
+    void SetNull() { hash = 0; n = -1; }
+    bool IsNull() const { return (hash == 0 && n == -1); }
+
+    friend bool operator<(const COutPoint& a, const COutPoint& b)
+    {
+        return (a.hash < b.hash || (a.hash == b.hash && a.n < b.n));
+    }
+
+    friend bool operator==(const COutPoint& a, const COutPoint& b)
+    {
+        return (a.hash == b.hash && a.n == b.n);
+    }
+
+    friend bool operator!=(const COutPoint& a, const COutPoint& b)
+    {
+        return !(a == b);
+    }
+
+    string ToString() const
+    {
+        return strprintf("COutPoint(%s, %d)", hash.ToString().substr(0,6).c_str(), n);
+    }
+
+    void print() const
+    {
+        printf("%s\n", ToString().c_str());
+    }
+};
+
+
+
+
+//
+// An input of a transaction.  It contains the location of the previous
+// transaction's output that it claims and a signature that matches the
+// output's public key.
+//
+class CTxIn
+{
+public:
+    COutPoint prevout;
+    CScript scriptSig;
+    unsigned int nSequence;
+
+    CTxIn()
+    {
+        nSequence = UINT_MAX;
+    }
+
+    explicit CTxIn(COutPoint prevoutIn, CScript scriptSigIn=CScript(), unsigned int nSequenceIn=UINT_MAX)
+    {
+        prevout = prevoutIn;
+        scriptSig = scriptSigIn;
+        nSequence = nSequenceIn;
+    }
+
+    CTxIn(uint256 hashPrevTx, unsigned int nOut, CScript scriptSigIn=CScript(), unsigned int nSequenceIn=UINT_MAX)
+    {
+        prevout = COutPoint(hashPrevTx, nOut);
+        scriptSig = scriptSigIn;
+        nSequence = nSequenceIn;
+    }
+
+    IMPLEMENT_SERIALIZE
+    (
+        READWRITE(prevout);
+        READWRITE(scriptSig);
+        READWRITE(nSequence);
+    )
+
+    bool IsFinal() const
+    {
+        return (nSequence == UINT_MAX);
+    }
+
+    friend bool operator==(const CTxIn& a, const CTxIn& b)
+    {
+        return (a.prevout   == b.prevout &&
+                a.scriptSig == b.scriptSig &&
+                a.nSequence == b.nSequence);
+    }
+
+    friend bool operator!=(const CTxIn& a, const CTxIn& b)
+    {
+        return !(a == b);
+    }
+
+    string ToString() const
+    {
+        string str;
+        str += strprintf("CTxIn(");
+        str += prevout.ToString();
+        if (prevout.IsNull())
+            str += strprintf(", coinbase %s", HexStr(scriptSig.begin(), scriptSig.end(), false).c_str());
+        else
+            str += strprintf(", scriptSig=%s", scriptSig.ToString().substr(0,24).c_str());
+        if (nSequence != UINT_MAX)
+            str += strprintf(", nSequence=%u", nSequence);
+        str += ")";
+        return str;
+    }
+
+    void print() const
+    {
+        printf("%s\n", ToString().c_str());
+    }
+
+    bool IsMine() const;
+    int64 GetDebit() const;
+};
+
+
+
+
+//
+// An output of a transaction.  It contains the public key that the next input
+// must be able to sign with to claim it.
+//
+class CTxOut
+{
+public:
+    int64 nValue;
+    CScript scriptPubKey;
+
+public:
+    CTxOut()
+    {
+        SetNull();
+    }
+
+    CTxOut(int64 nValueIn, CScript scriptPubKeyIn)
+    {
+        nValue = nValueIn;
+        scriptPubKey = scriptPubKeyIn;
+    }
+
+    IMPLEMENT_SERIALIZE
+    (
+        READWRITE(nValue);
+        READWRITE(scriptPubKey);
+    )
+
+    void SetNull()
+    {
+        nValue = -1;
+        scriptPubKey.clear();
+    }
+
+    bool IsNull()
+    {
+        return (nValue == -1);
+    }
+
+    uint256 GetHash() const
+    {
+        return SerializeHash(*this);
+    }
+
+    bool IsMine() const
+    {
+        return ::IsMine(scriptPubKey);
+    }
+
+    int64 GetCredit() const
+    {
+        if (IsMine())
+            return nValue;
+        return 0;
+    }
+
+    friend bool operator==(const CTxOut& a, const CTxOut& b)
+    {
+        return (a.nValue       == b.nValue &&
+                a.scriptPubKey == b.scriptPubKey);
+    }
+
+    friend bool operator!=(const CTxOut& a, const CTxOut& b)
+    {
+        return !(a == b);
+    }
+
+    string ToString() const
+    {
+        if (scriptPubKey.size() < 6)
+            return "CTxOut(error)";
+        return strprintf("CTxOut(nValue=%"PRI64d".%08"PRI64d", scriptPubKey=%s)", nValue / COIN, nValue % COIN, scriptPubKey.ToString().substr(0,24).c_str());
+    }
+
+    void print() const
+    {
+        printf("%s\n", ToString().c_str());
+    }
+};
+
+
+
+
+//
+// The basic transaction that is broadcasted on the network and contained in
+// blocks.  A transaction can contain multiple inputs and outputs.
+//
+class CTransaction
+{
+public:
+    int nVersion;
+    vector<CTxIn> vin;
+    vector<CTxOut> vout;
+    unsigned int nLockTime;
+
+
+    CTransaction()
+    {
+        SetNull();
+    }
+
+    IMPLEMENT_SERIALIZE
+    (
+        READWRITE(this->nVersion);
+        nVersion = this->nVersion;
+        READWRITE(vin);
+        READWRITE(vout);
+        READWRITE(nLockTime);
+    )
+
+    void SetNull()
+    {
+        nVersion = 1;
+        vin.clear();
+        vout.clear();
+        nLockTime = 0;
+    }
+
+    bool IsNull() const
+    {
+        return (vin.empty() && vout.empty());
+    }
+
+    uint256 GetHash() const
+    {
+        return SerializeHash(*this);
+    }
+
+    bool IsFinal(int64 nBlockTime=0) const
+    {
+        // Time based nLockTime implemented in 0.1.6,
+        // do not use time based until most 0.1.5 nodes have upgraded.
+        if (nLockTime == 0)
+            return true;
+        if (nBlockTime == 0)
+            nBlockTime = GetAdjustedTime();
+        if (nLockTime < (nLockTime < 500000000 ? nBestHeight : nBlockTime))
+            return true;
+        foreach(const CTxIn& txin, vin)
+            if (!txin.IsFinal())
+                return false;
+        return true;
+    }
+
+    bool IsNewerThan(const CTransaction& old) const
+    {
+        if (vin.size() != old.vin.size())
+            return false;
+        for (int i = 0; i < vin.size(); i++)
+            if (vin[i].prevout != old.vin[i].prevout)
+                return false;
+
+        bool fNewer = false;
+        unsigned int nLowest = UINT_MAX;
+        for (int i = 0; i < vin.size(); i++)
+        {
+            if (vin[i].nSequence != old.vin[i].nSequence)
+            {
+                if (vin[i].nSequence <= nLowest)
+                {
+                    fNewer = false;
+                    nLowest = vin[i].nSequence;
+                }
+                if (old.vin[i].nSequence < nLowest)
+                {
+                    fNewer = true;
+                    nLowest = old.vin[i].nSequence;
+                }
+            }
+        }
+        return fNewer;
+    }
+
+    bool IsCoinBase() const
+    {
+        return (vin.size() == 1 && vin[0].prevout.IsNull());
+    }
+
+    bool CheckTransaction() const
+    {
+        // Basic checks that don't depend on any context
+        if (vin.empty() || vout.empty())
+            return error("CTransaction::CheckTransaction() : vin or vout empty");
+
+        // Check for negative values
+        foreach(const CTxOut& txout, vout)
+            if (txout.nValue < 0)
+                return error("CTransaction::CheckTransaction() : txout.nValue negative");
+
+        if (IsCoinBase())
+        {
+            if (vin[0].scriptSig.size() < 2 || vin[0].scriptSig.size() > 100)
+                return error("CTransaction::CheckTransaction() : coinbase script size");
+        }
+        else
+        {
+            foreach(const CTxIn& txin, vin)
+                if (txin.prevout.IsNull())
+                    return error("CTransaction::CheckTransaction() : prevout is null");
+        }
+
+        return true;
+    }
+
+    bool IsMine() const
+    {
+        foreach(const CTxOut& txout, vout)
+            if (txout.IsMine())
+                return true;
+        return false;
+    }
+
+    int64 GetDebit() const
+    {
+        int64 nDebit = 0;
+        foreach(const CTxIn& txin, vin)
+            nDebit += txin.GetDebit();
+        return nDebit;
+    }
+
+    int64 GetCredit() const
+    {
+        int64 nCredit = 0;
+        foreach(const CTxOut& txout, vout)
+            nCredit += txout.GetCredit();
+        return nCredit;
+    }
+
+    int64 GetValueOut() const
+    {
+        int64 nValueOut = 0;
+        foreach(const CTxOut& txout, vout)
+        {
+            if (txout.nValue < 0)
+                throw runtime_error("CTransaction::GetValueOut() : negative value");
+            nValueOut += txout.nValue;
+        }
+        return nValueOut;
+    }
+
+    int64 GetMinFee(unsigned int nBlockSize=1) const
+    {
+        // Base fee is 1 cent per kilobyte
+        unsigned int nBytes = ::GetSerializeSize(*this, SER_NETWORK);
+        int64 nMinFee = (1 + (int64)nBytes / 1000) * CENT;
+
+        // Transactions under 60K are free as long as block size is under 80K
+        // (about 27,000bc if made of 50bc inputs)
+        if (nBytes < 60000 && nBlockSize < 80000)
+            nMinFee = 0;
+
+        // Transactions under 3K are free as long as block size is under 200K
+        if (nBytes < 3000 && nBlockSize < 200000)
+            nMinFee = 0;
+
+        // To limit dust spam, require a 0.01 fee if any output is less than 0.01
+        if (nMinFee < CENT)
+            foreach(const CTxOut& txout, vout)
+                if (txout.nValue < CENT)
+                    nMinFee = CENT;
+
+        return nMinFee;
+    }
+
+
+
+    bool ReadFromDisk(CDiskTxPos pos, FILE** pfileRet=NULL)
+    {
+        CAutoFile filein = OpenBlockFile(pos.nFile, 0, pfileRet ? "rb+" : "rb");
+        if (!filein)
+            return error("CTransaction::ReadFromDisk() : OpenBlockFile failed");
+
+        // Read transaction
+        if (fseek(filein, pos.nTxPos, SEEK_SET) != 0)
+            return error("CTransaction::ReadFromDisk() : fseek failed");
+        filein >> *this;
+
+        // Return file pointer
+        if (pfileRet)
+        {
+            if (fseek(filein, pos.nTxPos, SEEK_SET) != 0)
+                return error("CTransaction::ReadFromDisk() : second fseek failed");
+            *pfileRet = filein.release();
+        }
+        return true;
+    }
+
+
+    friend bool operator==(const CTransaction& a, const CTransaction& b)
+    {
+        return (a.nVersion  == b.nVersion &&
+                a.vin       == b.vin &&
+                a.vout      == b.vout &&
+                a.nLockTime == b.nLockTime);
+    }
+
+    friend bool operator!=(const CTransaction& a, const CTransaction& b)
+    {
+        return !(a == b);
+    }
+
+
+    string ToString() const
+    {
+        string str;
+        str += strprintf("CTransaction(hash=%s, ver=%d, vin.size=%d, vout.size=%d, nLockTime=%d)\n",
+            GetHash().ToString().substr(0,6).c_str(),
+            nVersion,
+            vin.size(),
+            vout.size(),
+            nLockTime);
+        for (int i = 0; i < vin.size(); i++)
+            str += "    " + vin[i].ToString() + "\n";
+        for (int i = 0; i < vout.size(); i++)
+            str += "    " + vout[i].ToString() + "\n";
+        return str;
+    }
+
+    void print() const
+    {
+        printf("%s", ToString().c_str());
+    }
+
+
+
+    bool DisconnectInputs(CTxDB& txdb);
+    bool ConnectInputs(CTxDB& txdb, map<uint256, CTxIndex>& mapTestPool, CDiskTxPos posThisTx, int nHeight, int64& nFees, bool fBlock, bool fMiner, int64 nMinFee=0);
+    bool ClientConnectInputs();
+
+    bool AcceptTransaction(CTxDB& txdb, bool fCheckInputs=true, bool* pfMissingInputs=NULL);
+
+    bool AcceptTransaction(bool fCheckInputs=true, bool* pfMissingInputs=NULL)
+    {
+        CTxDB txdb("r");
+        return AcceptTransaction(txdb, fCheckInputs, pfMissingInputs);
+    }
+
+protected:
+    bool AddToMemoryPool();
+public:
+    bool RemoveFromMemoryPool();
+};
+
+
+
+
+
+//
+// A transaction with a merkle branch linking it to the block chain
+//
+class CMerkleTx : public CTransaction
+{
+public:
+    uint256 hashBlock;
+    vector<uint256> vMerkleBranch;
+    int nIndex;
+
+    // memory only
+    mutable bool fMerkleVerified;
+    mutable bool fGetCreditCached;
+    mutable int64 nGetCreditCached;
+
+
+    CMerkleTx()
+    {
+        Init();
+    }
+
+    CMerkleTx(const CTransaction& txIn) : CTransaction(txIn)
+    {
+        Init();
+    }
+
+    void Init()
+    {
+        hashBlock = 0;
+        nIndex = -1;
+        fMerkleVerified = false;
+        fGetCreditCached = false;
+        nGetCreditCached = 0;
+    }
+
+    IMPLEMENT_SERIALIZE
+    (
+        nSerSize += SerReadWrite(s, *(CTransaction*)this, nType, nVersion, ser_action);
+        nVersion = this->nVersion;
+        READWRITE(hashBlock);
+        READWRITE(vMerkleBranch);
+        READWRITE(nIndex);
+    )
+
+    int64 GetCredit(bool fUseCache=false) const
+    {
+        // Must wait until coinbase is safely deep enough in the chain before valuing it
+        if (IsCoinBase() && GetBlocksToMaturity() > 0)
+            return 0;
+
+        // GetBalance can assume transactions in mapWallet won't change
+        if (fUseCache && fGetCreditCached)
+            return nGetCreditCached;
+        nGetCreditCached = CTransaction::GetCredit();
+        fGetCreditCached = true;
+        return nGetCreditCached;
+    }
+
+
+    int SetMerkleBranch(const CBlock* pblock=NULL);
+    int GetDepthInMainChain(int& nHeightRet) const;
+    int GetDepthInMainChain() const { int nHeight; return GetDepthInMainChain(nHeight); }
+    bool IsInMainChain() const { return GetDepthInMainChain() > 0; }
+    int GetBlocksToMaturity() const;
+    bool AcceptTransaction(CTxDB& txdb, bool fCheckInputs=true);
+    bool AcceptTransaction() { CTxDB txdb("r"); return AcceptTransaction(txdb); }
+};
+
+
+
+
+//
+// A transaction with a bunch of additional info that only the owner cares
+// about.  It includes any unrecorded transactions needed to link it back
+// to the block chain.
+//
+class CWalletTx : public CMerkleTx
+{
+public:
+    vector<CMerkleTx> vtxPrev;
+    map<string, string> mapValue;
+    vector<pair<string, string> > vOrderForm;
+    unsigned int fTimeReceivedIsTxTime;
+    unsigned int nTimeReceived;  // time received by this node
+    char fFromMe;
+    char fSpent;
+    //// probably need to sign the order info so know it came from payer
+
+    // memory only UI hints
+    mutable unsigned int nTimeDisplayed;
+    mutable int nLinesDisplayed;
+
+
+    CWalletTx()
+    {
+        Init();
+    }
+
+    CWalletTx(const CMerkleTx& txIn) : CMerkleTx(txIn)
+    {
+        Init();
+    }
+
+    CWalletTx(const CTransaction& txIn) : CMerkleTx(txIn)
+    {
+        Init();
+    }
+
+    void Init()
+    {
+        fTimeReceivedIsTxTime = false;
+        nTimeReceived = 0;
+        fFromMe = false;
+        fSpent = false;
+        nTimeDisplayed = 0;
+        nLinesDisplayed = 0;
+    }
+
+    IMPLEMENT_SERIALIZE
+    (
+        nSerSize += SerReadWrite(s, *(CMerkleTx*)this, nType, nVersion, ser_action);
+        nVersion = this->nVersion;
+        READWRITE(vtxPrev);
+        READWRITE(mapValue);
+        READWRITE(vOrderForm);
+        READWRITE(fTimeReceivedIsTxTime);
+        READWRITE(nTimeReceived);
+        READWRITE(fFromMe);
+        READWRITE(fSpent);
+    )
+
+    bool WriteToDisk()
+    {
+        return CWalletDB().WriteTx(GetHash(), *this);
+    }
+
+
+    int64 GetTxTime() const;
+    int GetRequestCount() const;
+
+    void AddSupportingTransactions(CTxDB& txdb);
+
+    bool AcceptWalletTransaction(CTxDB& txdb, bool fCheckInputs=true);
+    bool AcceptWalletTransaction() { CTxDB txdb("r"); return AcceptWalletTransaction(txdb); }
+
+    void RelayWalletTransaction(CTxDB& txdb);
+    void RelayWalletTransaction() { CTxDB txdb("r"); RelayWalletTransaction(txdb); }
+};
+
+
+
+
+//
+// A txdb record that contains the disk location of a transaction and the
+// locations of transactions that spend its outputs.  vSpent is really only
+// used as a flag, but having the location is very helpful for debugging.
+//
+class CTxIndex
+{
+public:
+    CDiskTxPos pos;
+    vector<CDiskTxPos> vSpent;
+
+    CTxIndex()
+    {
+        SetNull();
+    }
+
+    CTxIndex(const CDiskTxPos& posIn, unsigned int nOutputs)
+    {
+        pos = posIn;
+        vSpent.resize(nOutputs);
+    }
+
+    IMPLEMENT_SERIALIZE
+    (
+        if (!(nType & SER_GETHASH))
+            READWRITE(nVersion);
+        READWRITE(pos);
+        READWRITE(vSpent);
+    )
+
+    void SetNull()
+    {
+        pos.SetNull();
+        vSpent.clear();
+    }
+
+    bool IsNull()
+    {
+        return pos.IsNull();
+    }
+
+    friend bool operator==(const CTxIndex& a, const CTxIndex& b)
+    {
+        if (a.pos != b.pos || a.vSpent.size() != b.vSpent.size())
+            return false;
+        for (int i = 0; i < a.vSpent.size(); i++)
+            if (a.vSpent[i] != b.vSpent[i])
+                return false;
+        return true;
+    }
+
+    friend bool operator!=(const CTxIndex& a, const CTxIndex& b)
+    {
+        return !(a == b);
+    }
+};
+
+
+
+
+
+//
+// Nodes collect new transactions into a block, hash them into a hash tree,
+// and scan through nonce values to make the block's hash satisfy proof-of-work
+// requirements.  When they solve the proof-of-work, they broadcast the block
+// to everyone and the block is added to the block chain.  The first transaction
+// in the block is a special one that creates a new coin owned by the creator
+// of the block.
+//
+// Blocks are appended to blk0001.dat files on disk.  Their location on disk
+// is indexed by CBlockIndex objects in memory.
+//
+class CBlock
+{
+public:
+    // header
+    int nVersion;
+    uint256 hashPrevBlock;
+    uint256 hashMerkleRoot;
+    unsigned int nTime;
+    unsigned int nBits;
+    unsigned int nNonce;
+
+    // network and disk
+    vector<CTransaction> vtx;
+
+    // memory only
+    mutable vector<uint256> vMerkleTree;
+
+
+    CBlock()
+    {
+        SetNull();
+    }
+
+    IMPLEMENT_SERIALIZE
+    (
+        READWRITE(this->nVersion);
+        nVersion = this->nVersion;
+        READWRITE(hashPrevBlock);
+        READWRITE(hashMerkleRoot);
+        READWRITE(nTime);
+        READWRITE(nBits);
+        READWRITE(nNonce);
+
+        // ConnectBlock depends on vtx being last so it can calculate offset
+        if (!(nType & (SER_GETHASH|SER_BLOCKHEADERONLY)))
+            READWRITE(vtx);
+        else if (fRead)
+            const_cast<CBlock*>(this)->vtx.clear();
+    )
+
+    void SetNull()
+    {
+        nVersion = 1;
+        hashPrevBlock = 0;
+        hashMerkleRoot = 0;
+        nTime = 0;
+        nBits = 0;
+        nNonce = 0;
+        vtx.clear();
+        vMerkleTree.clear();
+    }
+
+    bool IsNull() const
+    {
+        return (nBits == 0);
+    }
+
+    uint256 GetHash() const
+    {
+        return Hash(BEGIN(nVersion), END(nNonce));
+    }
+
+
+    uint256 BuildMerkleTree() const
+    {
+        vMerkleTree.clear();
+        foreach(const CTransaction& tx, vtx)
+            vMerkleTree.push_back(tx.GetHash());
+        int j = 0;
+        for (int nSize = vtx.size(); nSize > 1; nSize = (nSize + 1) / 2)
+        {
+            for (int i = 0; i < nSize; i += 2)
+            {
+                int i2 = min(i+1, nSize-1);
+                vMerkleTree.push_back(Hash(BEGIN(vMerkleTree[j+i]),  END(vMerkleTree[j+i]),
+                                           BEGIN(vMerkleTree[j+i2]), END(vMerkleTree[j+i2])));
+            }
+            j += nSize;
+        }
+        return (vMerkleTree.empty() ? 0 : vMerkleTree.back());
+    }
+
+    vector<uint256> GetMerkleBranch(int nIndex) const
+    {
+        if (vMerkleTree.empty())
+            BuildMerkleTree();
+        vector<uint256> vMerkleBranch;
+        int j = 0;
+        for (int nSize = vtx.size(); nSize > 1; nSize = (nSize + 1) / 2)
+        {
+            int i = min(nIndex^1, nSize-1);
+            vMerkleBranch.push_back(vMerkleTree[j+i]);
+            nIndex >>= 1;
+            j += nSize;
+        }
+        return vMerkleBranch;
+    }
+
+    static uint256 CheckMerkleBranch(uint256 hash, const vector<uint256>& vMerkleBranch, int nIndex)
+    {
+        if (nIndex == -1)
+            return 0;
+        foreach(const uint256& otherside, vMerkleBranch)
+        {
+            if (nIndex & 1)
+                hash = Hash(BEGIN(otherside), END(otherside), BEGIN(hash), END(hash));
+            else
+                hash = Hash(BEGIN(hash), END(hash), BEGIN(otherside), END(otherside));
+            nIndex >>= 1;
+        }
+        return hash;
+    }
+
+
+    bool WriteToDisk(bool fWriteTransactions, unsigned int& nFileRet, unsigned int& nBlockPosRet)
+    {
+        // Open history file to append
+        CAutoFile fileout = AppendBlockFile(nFileRet);
+        if (!fileout)
+            return error("CBlock::WriteToDisk() : AppendBlockFile failed");
+        if (!fWriteTransactions)
+            fileout.nType |= SER_BLOCKHEADERONLY;
+
+        // Write index header
+        unsigned int nSize = fileout.GetSerializeSize(*this);
+        fileout << FLATDATA(pchMessageStart) << nSize;
+
+        // Write block
+        nBlockPosRet = ftell(fileout);
+        if (nBlockPosRet == -1)
+            return error("CBlock::WriteToDisk() : ftell failed");
+        fileout << *this;
+
+        // Flush stdio buffers and commit to disk before returning
+        fflush(fileout);
+#ifdef __WXMSW__
+        _commit(_fileno(fileout));
+#else
+        fsync(fileno(fileout));
+#endif
+
+        return true;
+    }
+
+    bool ReadFromDisk(unsigned int nFile, unsigned int nBlockPos, bool fReadTransactions=true)
+    {
+        SetNull();
+
+        // Open history file to read
+        CAutoFile filein = OpenBlockFile(nFile, nBlockPos, "rb");
+        if (!filein)
+            return error("CBlock::ReadFromDisk() : OpenBlockFile failed");
+        if (!fReadTransactions)
+            filein.nType |= SER_BLOCKHEADERONLY;
+
+        // Read block
+        filein >> *this;
+
+        // Check the header
+        if (CBigNum().SetCompact(nBits) > bnProofOfWorkLimit)
+            return error("CBlock::ReadFromDisk() : nBits errors in block header");
+        if (GetHash() > CBigNum().SetCompact(nBits).getuint256())
+            return error("CBlock::ReadFromDisk() : GetHash() errors in block header");
+
+        return true;
+    }
+
+
+
+    void print() const
+    {
+        printf("CBlock(hash=%s, ver=%d, hashPrevBlock=%s, hashMerkleRoot=%s, nTime=%u, nBits=%08x, nNonce=%u, vtx=%d)\n",
+            GetHash().ToString().substr(0,16).c_str(),
+            nVersion,
+            hashPrevBlock.ToString().substr(0,16).c_str(),
+            hashMerkleRoot.ToString().substr(0,6).c_str(),
+            nTime, nBits, nNonce,
+            vtx.size());
+        for (int i = 0; i < vtx.size(); i++)
+        {
+            printf("  ");
+            vtx[i].print();
+        }
+        printf("  vMerkleTree: ");
+        for (int i = 0; i < vMerkleTree.size(); i++)
+            printf("%s ", vMerkleTree[i].ToString().substr(0,6).c_str());
+        printf("\n");
+    }
+
+
+    int64 GetBlockValue(int64 nFees) const;
+    bool DisconnectBlock(CTxDB& txdb, CBlockIndex* pindex);
+    bool ConnectBlock(CTxDB& txdb, CBlockIndex* pindex);
+    bool ReadFromDisk(const CBlockIndex* blockindex, bool fReadTransactions=true);
+    bool AddToBlockIndex(unsigned int nFile, unsigned int nBlockPos);
+    bool CheckBlock() const;
+    bool AcceptBlock();
+};
+
+
+
+
+
+
+//
+// The block chain is a tree shaped structure starting with the
+// genesis block at the root, with each block potentially having multiple
+// candidates to be the next block.  pprev and pnext link a path through the
+// main/longest chain.  A blockindex may have multiple pprev pointing back
+// to it, but pnext will only point forward to the longest branch, or will
+// be null if the block is not part of the longest chain.
+//
+class CBlockIndex
+{
+public:
+    const uint256* phashBlock;
+    CBlockIndex* pprev;
+    CBlockIndex* pnext;
+    unsigned int nFile;
+    unsigned int nBlockPos;
+    int nHeight;
+
+    // block header
+    int nVersion;
+    uint256 hashMerkleRoot;
+    unsigned int nTime;
+    unsigned int nBits;
+    unsigned int nNonce;
+
+
+    CBlockIndex()
+    {
+        phashBlock = NULL;
+        pprev = NULL;
+        pnext = NULL;
+        nFile = 0;
+        nBlockPos = 0;
+        nHeight = 0;
+
+        nVersion       = 0;
+        hashMerkleRoot = 0;
+        nTime          = 0;
+        nBits          = 0;
+        nNonce         = 0;
+    }
+
+    CBlockIndex(unsigned int nFileIn, unsigned int nBlockPosIn, CBlock& block)
+    {
+        phashBlock = NULL;
+        pprev = NULL;
+        pnext = NULL;
+        nFile = nFileIn;
+        nBlockPos = nBlockPosIn;
+        nHeight = 0;
+
+        nVersion       = block.nVersion;
+        hashMerkleRoot = block.hashMerkleRoot;
+        nTime          = block.nTime;
+        nBits          = block.nBits;
+        nNonce         = block.nNonce;
+    }
+
+    uint256 GetBlockHash() const
+    {
+        return *phashBlock;
+    }
+
+    bool IsInMainChain() const
+    {
+        return (pnext || this == pindexBest);
+    }
+
+    bool EraseBlockFromDisk()
+    {
+        // Open history file
+        CAutoFile fileout = OpenBlockFile(nFile, nBlockPos, "rb+");
+        if (!fileout)
+            return false;
+
+        // Overwrite with empty null block
+        CBlock block;
+        block.SetNull();
+        fileout << block;
+
+        return true;
+    }
+
+    enum { nMedianTimeSpan=11 };
+
+    int64 GetMedianTimePast() const
+    {
+        unsigned int pmedian[nMedianTimeSpan];
+        unsigned int* pbegin = &pmedian[nMedianTimeSpan];
+        unsigned int* pend = &pmedian[nMedianTimeSpan];
+
+        const CBlockIndex* pindex = this;
+        for (int i = 0; i < nMedianTimeSpan && pindex; i++, pindex = pindex->pprev)
+            *(--pbegin) = pindex->nTime;
+
+        sort(pbegin, pend);
+        return pbegin[(pend - pbegin)/2];
+    }
+
+    int64 GetMedianTime() const
+    {
+        const CBlockIndex* pindex = this;
+        for (int i = 0; i < nMedianTimeSpan/2; i++)
+        {
+            if (!pindex->pnext)
+                return nTime;
+            pindex = pindex->pnext;
+        }
+        return pindex->GetMedianTimePast();
+    }
+
+
+
+    string ToString() const
+    {
+        return strprintf("CBlockIndex(nprev=%08x, pnext=%08x, nFile=%d, nBlockPos=%-6d nHeight=%d, merkle=%s, hashBlock=%s)",
+            pprev, pnext, nFile, nBlockPos, nHeight,
+            hashMerkleRoot.ToString().substr(0,6).c_str(),
+            GetBlockHash().ToString().substr(0,16).c_str());
+    }
+
+    void print() const
+    {
+        printf("%s\n", ToString().c_str());
+    }
+};
+
+
+
+//
+// Used to marshal pointers into hashes for db storage.
+//
+class CDiskBlockIndex : public CBlockIndex
+{
+public:
+    uint256 hashPrev;
+    uint256 hashNext;
+
+    CDiskBlockIndex()
+    {
+        hashPrev = 0;
+        hashNext = 0;
+    }
+
+    explicit CDiskBlockIndex(CBlockIndex* pindex) : CBlockIndex(*pindex)
+    {
+        hashPrev = (pprev ? pprev->GetBlockHash() : 0);
+        hashNext = (pnext ? pnext->GetBlockHash() : 0);
+    }
+
+    IMPLEMENT_SERIALIZE
+    (
+        if (!(nType & SER_GETHASH))
+            READWRITE(nVersion);
+
+        READWRITE(hashNext);
+        READWRITE(nFile);
+        READWRITE(nBlockPos);
+        READWRITE(nHeight);
+
+        // block header
+        READWRITE(this->nVersion);
+        READWRITE(hashPrev);
+        READWRITE(hashMerkleRoot);
+        READWRITE(nTime);
+        READWRITE(nBits);
+        READWRITE(nNonce);
+    )
+
+    uint256 GetBlockHash() const
+    {
+        CBlock block;
+        block.nVersion        = nVersion;
+        block.hashPrevBlock   = hashPrev;
+        block.hashMerkleRoot  = hashMerkleRoot;
+        block.nTime           = nTime;
+        block.nBits           = nBits;
+        block.nNonce          = nNonce;
+        return block.GetHash();
+    }
+
+
+    string ToString() const
+    {
+        string str = "CDiskBlockIndex(";
+        str += CBlockIndex::ToString();
+        str += strprintf("\n                hashBlock=%s, hashPrev=%s, hashNext=%s)",
+            GetBlockHash().ToString().c_str(),
+            hashPrev.ToString().substr(0,16).c_str(),
+            hashNext.ToString().substr(0,16).c_str());
+        return str;
+    }
+
+    void print() const
+    {
+        printf("%s\n", ToString().c_str());
+    }
+};
+
+
+
+
+
+
+
+
+//
+// Describes a place in the block chain to another node such that if the
+// other node doesn't have the same branch, it can find a recent common trunk.
+// The further back it is, the further before the fork it may be.
+//
+class CBlockLocator
+{
+protected:
+    vector<uint256> vHave;
+public:
+
+    CBlockLocator()
+    {
+    }
+
+    explicit CBlockLocator(const CBlockIndex* pindex)
+    {
+        Set(pindex);
+    }
+
+    explicit CBlockLocator(uint256 hashBlock)
+    {
+        map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
+        if (mi != mapBlockIndex.end())
+            Set((*mi).second);
+    }
+
+    IMPLEMENT_SERIALIZE
+    (
+        if (!(nType & SER_GETHASH))
+            READWRITE(nVersion);
+        READWRITE(vHave);
+    )
+
+    void Set(const CBlockIndex* pindex)
+    {
+        vHave.clear();
+        int nStep = 1;
+        while (pindex)
+        {
+            vHave.push_back(pindex->GetBlockHash());
+
+            // Exponentially larger steps back
+            for (int i = 0; pindex && i < nStep; i++)
+                pindex = pindex->pprev;
+            if (vHave.size() > 10)
+                nStep *= 2;
+        }
+        vHave.push_back(hashGenesisBlock);
+    }
+
+    int GetDistanceBack()
+    {
+        // Retrace how far back it was in the sender's branch
+        int nDistance = 0;
+        int nStep = 1;
+        foreach(const uint256& hash, vHave)
+        {
+            map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);
+            if (mi != mapBlockIndex.end())
+            {
+                CBlockIndex* pindex = (*mi).second;
+                if (pindex->IsInMainChain())
+                    return nDistance;
+            }
+            nDistance += nStep;
+            if (nDistance > 10)
+                nStep *= 2;
+        }
+        return nDistance;
+    }
+
+    CBlockIndex* GetBlockIndex()
+    {
+        // Find the first block the caller has in the main chain
+        foreach(const uint256& hash, vHave)
+        {
+            map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);
+            if (mi != mapBlockIndex.end())
+            {
+                CBlockIndex* pindex = (*mi).second;
+                if (pindex->IsInMainChain())
+                    return pindex;
+            }
+        }
+        return pindexGenesisBlock;
+    }
+
+    uint256 GetBlockHash()
+    {
+        // Find the first block the caller has in the main chain
+        foreach(const uint256& hash, vHave)
+        {
+            map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);
+            if (mi != mapBlockIndex.end())
+            {
+                CBlockIndex* pindex = (*mi).second;
+                if (pindex->IsInMainChain())
+                    return hash;
+            }
+        }
+        return hashGenesisBlock;
+    }
+
+    int GetHeight()
+    {
+        CBlockIndex* pindex = GetBlockIndex();
+        if (!pindex)
+            return 0;
+        return pindex->nHeight;
+    }
+};
+
+
+
+
+
+
+//
+// Private key that includes an expiration date in case it never gets used.
+//
+class CWalletKey
+{
+public:
+    CPrivKey vchPrivKey;
+    int64 nTimeCreated;
+    int64 nTimeExpires;
+    string strComment;
+    //// todo: add something to note what created it (user, getnewaddress, change)
+    ////   maybe should have a map<string, string> property map
+
+    CWalletKey(int64 nTimeExpiresIn=0)
+    {
+        nTimeCreated = (nTimeExpiresIn ? GetTime() : 0);
+        nTimeExpires = nTimeExpiresIn;
+    }
+
+    IMPLEMENT_SERIALIZE
+    (
+        if (!(nType & SER_GETHASH))
+            READWRITE(nVersion);
+        READWRITE(vchPrivKey);
+        READWRITE(nTimeCreated);
+        READWRITE(nTimeExpires);
+        READWRITE(strComment);
+    )
+};
+
+
+
+
+
+
+extern map<uint256, CTransaction> mapTransactions;
+extern map<uint256, CWalletTx> mapWallet;
+extern vector<uint256> vWalletUpdated;
+extern CCriticalSection cs_mapWallet;
+extern map<vector<unsigned char>, CPrivKey> mapKeys;
+extern map<uint160, vector<unsigned char> > mapPubKeys;
+extern CCriticalSection cs_mapKeys;
+extern CKey keyUser;