Jeff Garzik
12 years ago
30 changed files with 1103 additions and 1023 deletions
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// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2013 The Bitcoin developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "core.h" |
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@ -0,0 +1,736 @@ |
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// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2013 The Bitcoin developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_CORE_H |
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#define BITCOIN_CORE_H |
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#include "uint256.h" |
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#include "serialize.h" |
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#include "util.h" |
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#include "script.h" |
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#include <stdio.h> |
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class CTransaction; |
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/** An outpoint - a combination of a transaction hash and an index n into its vout */ |
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class COutPoint |
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{ |
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public: |
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uint256 hash; |
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unsigned int n; |
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COutPoint() { SetNull(); } |
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COutPoint(uint256 hashIn, unsigned int nIn) { hash = hashIn; n = nIn; } |
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IMPLEMENT_SERIALIZE( READWRITE(FLATDATA(*this)); ) |
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void SetNull() { hash = 0; n = (unsigned int) -1; } |
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bool IsNull() const { return (hash == 0 && n == (unsigned int) -1); } |
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friend bool operator<(const COutPoint& a, const COutPoint& b) |
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{ |
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return (a.hash < b.hash || (a.hash == b.hash && a.n < b.n)); |
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} |
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friend bool operator==(const COutPoint& a, const COutPoint& b) |
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{ |
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return (a.hash == b.hash && a.n == b.n); |
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} |
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friend bool operator!=(const COutPoint& a, const COutPoint& b) |
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{ |
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return !(a == b); |
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} |
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std::string ToString() const |
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{ |
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return strprintf("COutPoint(%s, %u)", hash.ToString().substr(0,10).c_str(), n); |
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} |
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void print() const |
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{ |
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printf("%s\n", ToString().c_str()); |
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} |
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}; |
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/** An inpoint - a combination of a transaction and an index n into its vin */ |
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class CInPoint |
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{ |
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public: |
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CTransaction* ptx; |
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unsigned int n; |
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CInPoint() { SetNull(); } |
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CInPoint(CTransaction* ptxIn, unsigned int nIn) { ptx = ptxIn; n = nIn; } |
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void SetNull() { ptx = NULL; n = (unsigned int) -1; } |
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bool IsNull() const { return (ptx == NULL && n == (unsigned int) -1); } |
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}; |
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/** An input of a transaction. It contains the location of the previous
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* transaction's output that it claims and a signature that matches the |
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* output's public key. |
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*/ |
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class CTxIn |
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{ |
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public: |
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COutPoint prevout; |
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CScript scriptSig; |
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unsigned int nSequence; |
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CTxIn() |
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{ |
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nSequence = std::numeric_limits<unsigned int>::max(); |
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} |
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explicit CTxIn(COutPoint prevoutIn, CScript scriptSigIn=CScript(), unsigned int nSequenceIn=std::numeric_limits<unsigned int>::max()) |
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{ |
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prevout = prevoutIn; |
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scriptSig = scriptSigIn; |
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nSequence = nSequenceIn; |
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} |
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CTxIn(uint256 hashPrevTx, unsigned int nOut, CScript scriptSigIn=CScript(), unsigned int nSequenceIn=std::numeric_limits<unsigned int>::max()) |
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{ |
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prevout = COutPoint(hashPrevTx, nOut); |
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scriptSig = scriptSigIn; |
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nSequence = nSequenceIn; |
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} |
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IMPLEMENT_SERIALIZE |
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( |
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READWRITE(prevout); |
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READWRITE(scriptSig); |
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READWRITE(nSequence); |
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) |
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bool IsFinal() const |
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{ |
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return (nSequence == std::numeric_limits<unsigned int>::max()); |
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} |
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friend bool operator==(const CTxIn& a, const CTxIn& b) |
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{ |
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return (a.prevout == b.prevout && |
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a.scriptSig == b.scriptSig && |
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a.nSequence == b.nSequence); |
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} |
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friend bool operator!=(const CTxIn& a, const CTxIn& b) |
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{ |
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return !(a == b); |
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} |
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std::string ToString() const |
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{ |
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std::string str; |
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str += "CTxIn("; |
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str += prevout.ToString(); |
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if (prevout.IsNull()) |
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str += strprintf(", coinbase %s", HexStr(scriptSig).c_str()); |
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else |
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str += strprintf(", scriptSig=%s", scriptSig.ToString().substr(0,24).c_str()); |
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if (nSequence != std::numeric_limits<unsigned int>::max()) |
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str += strprintf(", nSequence=%u", nSequence); |
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str += ")"; |
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return str; |
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} |
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void print() const |
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{ |
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printf("%s\n", ToString().c_str()); |
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} |
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}; |
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/** An output of a transaction. It contains the public key that the next input
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* must be able to sign with to claim it. |
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*/ |
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class CTxOut |
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{ |
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public: |
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int64 nValue; |
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CScript scriptPubKey; |
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CTxOut() |
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{ |
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SetNull(); |
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} |
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CTxOut(int64 nValueIn, CScript scriptPubKeyIn) |
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{ |
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nValue = nValueIn; |
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scriptPubKey = scriptPubKeyIn; |
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} |
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IMPLEMENT_SERIALIZE |
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( |
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READWRITE(nValue); |
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READWRITE(scriptPubKey); |
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) |
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void SetNull() |
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{ |
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nValue = -1; |
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scriptPubKey.clear(); |
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} |
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bool IsNull() const |
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{ |
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return (nValue == -1); |
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} |
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uint256 GetHash() const |
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{ |
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return SerializeHash(*this); |
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} |
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bool IsDust(int64 nMinRelayTxFee) const |
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{ |
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// "Dust" is defined in terms of CTransaction::nMinRelayTxFee,
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// which has units satoshis-per-kilobyte.
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// If you'd pay more than 1/3 in fees
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// to spend something, then we consider it dust.
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// A typical txout is 33 bytes big, and will
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// need a CTxIn of at least 148 bytes to spend,
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// so dust is a txout less than 54 uBTC
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// (5430 satoshis) with default nMinRelayTxFee
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return ((nValue*1000)/(3*((int)GetSerializeSize(SER_DISK,0)+148)) < nMinRelayTxFee); |
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} |
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friend bool operator==(const CTxOut& a, const CTxOut& b) |
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{ |
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return (a.nValue == b.nValue && |
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a.scriptPubKey == b.scriptPubKey); |
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} |
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friend bool operator!=(const CTxOut& a, const CTxOut& b) |
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{ |
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return !(a == b); |
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} |
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std::string ToString() const |
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{ |
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if (scriptPubKey.size() < 6) |
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return "CTxOut(error)"; |
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return strprintf("CTxOut(nValue=%"PRI64d".%08"PRI64d", scriptPubKey=%s)", nValue / COIN, nValue % COIN, scriptPubKey.ToString().substr(0,30).c_str()); |
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} |
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void print() const |
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{ |
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printf("%s\n", ToString().c_str()); |
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} |
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}; |
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/** The basic transaction that is broadcasted on the network and contained in
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* blocks. A transaction can contain multiple inputs and outputs. |
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*/ |
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class CTransaction |
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{ |
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public: |
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static int64 nMinTxFee; |
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static int64 nMinRelayTxFee; |
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static const int CURRENT_VERSION=1; |
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int nVersion; |
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std::vector<CTxIn> vin; |
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std::vector<CTxOut> vout; |
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unsigned int nLockTime; |
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CTransaction() |
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{ |
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SetNull(); |
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} |
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IMPLEMENT_SERIALIZE |
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( |
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READWRITE(this->nVersion); |
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nVersion = this->nVersion; |
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READWRITE(vin); |
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READWRITE(vout); |
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READWRITE(nLockTime); |
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) |
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void SetNull() |
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{ |
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nVersion = CTransaction::CURRENT_VERSION; |
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vin.clear(); |
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vout.clear(); |
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nLockTime = 0; |
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} |
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bool IsNull() const |
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{ |
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return (vin.empty() && vout.empty()); |
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} |
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uint256 GetHash() const |
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{ |
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return SerializeHash(*this); |
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} |
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bool IsNewerThan(const CTransaction& old) const |
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{ |
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if (vin.size() != old.vin.size()) |
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return false; |
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for (unsigned int i = 0; i < vin.size(); i++) |
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if (vin[i].prevout != old.vin[i].prevout) |
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return false; |
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bool fNewer = false; |
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unsigned int nLowest = std::numeric_limits<unsigned int>::max(); |
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for (unsigned int i = 0; i < vin.size(); i++) |
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{ |
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if (vin[i].nSequence != old.vin[i].nSequence) |
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{ |
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if (vin[i].nSequence <= nLowest) |
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{ |
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fNewer = false; |
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nLowest = vin[i].nSequence; |
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} |
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if (old.vin[i].nSequence < nLowest) |
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{ |
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fNewer = true; |
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nLowest = old.vin[i].nSequence; |
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} |
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} |
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} |
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return fNewer; |
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} |
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bool IsCoinBase() const |
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{ |
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return (vin.size() == 1 && vin[0].prevout.IsNull()); |
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} |
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friend bool operator==(const CTransaction& a, const CTransaction& b) |
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{ |
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return (a.nVersion == b.nVersion && |
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a.vin == b.vin && |
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a.vout == b.vout && |
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a.nLockTime == b.nLockTime); |
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} |
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friend bool operator!=(const CTransaction& a, const CTransaction& b) |
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{ |
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return !(a == b); |
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} |
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std::string ToString() const |
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{ |
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std::string str; |
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str += strprintf("CTransaction(hash=%s, ver=%d, vin.size=%"PRIszu", vout.size=%"PRIszu", nLockTime=%u)\n", |
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GetHash().ToString().substr(0,10).c_str(), |
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nVersion, |
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vin.size(), |
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vout.size(), |
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nLockTime); |
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for (unsigned int i = 0; i < vin.size(); i++) |
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str += " " + vin[i].ToString() + "\n"; |
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for (unsigned int i = 0; i < vout.size(); i++) |
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str += " " + vout[i].ToString() + "\n"; |
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return str; |
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} |
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void print() const |
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{ |
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printf("%s", ToString().c_str()); |
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} |
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}; |
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/** wrapper for CTxOut that provides a more compact serialization */ |
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class CTxOutCompressor |
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{ |
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private: |
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CTxOut &txout; |
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public: |
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static uint64 CompressAmount(uint64 nAmount); |
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static uint64 DecompressAmount(uint64 nAmount); |
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CTxOutCompressor(CTxOut &txoutIn) : txout(txoutIn) { } |
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IMPLEMENT_SERIALIZE(({ |
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if (!fRead) { |
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uint64 nVal = CompressAmount(txout.nValue); |
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READWRITE(VARINT(nVal)); |
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} else { |
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uint64 nVal = 0; |
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READWRITE(VARINT(nVal)); |
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txout.nValue = DecompressAmount(nVal); |
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} |
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CScriptCompressor cscript(REF(txout.scriptPubKey)); |
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READWRITE(cscript); |
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});) |
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}; |
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/** Undo information for a CTxIn
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* |
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* Contains the prevout's CTxOut being spent, and if this was the |
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* last output of the affected transaction, its metadata as well |
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* (coinbase or not, height, transaction version) |
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*/ |
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class CTxInUndo |
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{ |
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public: |
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CTxOut txout; // the txout data before being spent
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bool fCoinBase; // if the outpoint was the last unspent: whether it belonged to a coinbase
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unsigned int nHeight; // if the outpoint was the last unspent: its height
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int nVersion; // if the outpoint was the last unspent: its version
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CTxInUndo() : txout(), fCoinBase(false), nHeight(0), nVersion(0) {} |
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CTxInUndo(const CTxOut &txoutIn, bool fCoinBaseIn = false, unsigned int nHeightIn = 0, int nVersionIn = 0) : txout(txoutIn), fCoinBase(fCoinBaseIn), nHeight(nHeightIn), nVersion(nVersionIn) { } |
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unsigned int GetSerializeSize(int nType, int nVersion) const { |
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return ::GetSerializeSize(VARINT(nHeight*2+(fCoinBase ? 1 : 0)), nType, nVersion) + |
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(nHeight > 0 ? ::GetSerializeSize(VARINT(this->nVersion), nType, nVersion) : 0) + |
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::GetSerializeSize(CTxOutCompressor(REF(txout)), nType, nVersion); |
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} |
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template<typename Stream> |
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void Serialize(Stream &s, int nType, int nVersion) const { |
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::Serialize(s, VARINT(nHeight*2+(fCoinBase ? 1 : 0)), nType, nVersion); |
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if (nHeight > 0) |
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::Serialize(s, VARINT(this->nVersion), nType, nVersion); |
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::Serialize(s, CTxOutCompressor(REF(txout)), nType, nVersion); |
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} |
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template<typename Stream> |
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void Unserialize(Stream &s, int nType, int nVersion) { |
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unsigned int nCode = 0; |
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::Unserialize(s, VARINT(nCode), nType, nVersion); |
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nHeight = nCode / 2; |
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fCoinBase = nCode & 1; |
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if (nHeight > 0) |
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::Unserialize(s, VARINT(this->nVersion), nType, nVersion); |
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::Unserialize(s, REF(CTxOutCompressor(REF(txout))), nType, nVersion); |
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} |
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}; |
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/** Undo information for a CTransaction */ |
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class CTxUndo |
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{ |
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public: |
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// undo information for all txins
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std::vector<CTxInUndo> vprevout; |
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IMPLEMENT_SERIALIZE( |
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READWRITE(vprevout); |
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) |
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}; |
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/** pruned version of CTransaction: only retains metadata and unspent transaction outputs
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* |
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* Serialized format: |
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* - VARINT(nVersion) |
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* - VARINT(nCode) |
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* - unspentness bitvector, for vout[2] and further; least significant byte first |
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* - the non-spent CTxOuts (via CTxOutCompressor) |
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* - VARINT(nHeight) |
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* |
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* The nCode value consists of: |
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* - bit 1: IsCoinBase() |
||||||
|
* - bit 2: vout[0] is not spent |
||||||
|
* - bit 4: vout[1] is not spent |
||||||
|
* - The higher bits encode N, the number of non-zero bytes in the following bitvector. |
||||||
|
* - In case both bit 2 and bit 4 are unset, they encode N-1, as there must be at |
||||||
|
* least one non-spent output). |
||||||
|
* |
||||||
|
* Example: 0104835800816115944e077fe7c803cfa57f29b36bf87c1d358bb85e |
||||||
|
* <><><--------------------------------------------><----> |
||||||
|
* | \ | / |
||||||
|
* version code vout[1] height |
||||||
|
* |
||||||
|
* - version = 1 |
||||||
|
* - code = 4 (vout[1] is not spent, and 0 non-zero bytes of bitvector follow) |
||||||
|
* - unspentness bitvector: as 0 non-zero bytes follow, it has length 0 |
||||||
|
* - vout[1]: 835800816115944e077fe7c803cfa57f29b36bf87c1d35 |
||||||
|
* * 8358: compact amount representation for 60000000000 (600 BTC) |
||||||
|
* * 00: special txout type pay-to-pubkey-hash |
||||||
|
* * 816115944e077fe7c803cfa57f29b36bf87c1d35: address uint160 |
||||||
|
* - height = 203998 |
||||||
|
* |
||||||
|
* |
||||||
|
* Example: 0109044086ef97d5790061b01caab50f1b8e9c50a5057eb43c2d9563a4eebbd123008c988f1a4a4de2161e0f50aac7f17e7f9555caa486af3b |
||||||
|
* <><><--><--------------------------------------------------><----------------------------------------------><----> |
||||||
|
* / \ \ | | / |
||||||
|
* version code unspentness vout[4] vout[16] height |
||||||
|
* |
||||||
|
* - version = 1 |
||||||
|
* - code = 9 (coinbase, neither vout[0] or vout[1] are unspent, |
||||||
|
* 2 (1, +1 because both bit 2 and bit 4 are unset) non-zero bitvector bytes follow) |
||||||
|
* - unspentness bitvector: bits 2 (0x04) and 14 (0x4000) are set, so vout[2+2] and vout[14+2] are unspent |
||||||
|
* - vout[4]: 86ef97d5790061b01caab50f1b8e9c50a5057eb43c2d9563a4ee |
||||||
|
* * 86ef97d579: compact amount representation for 234925952 (2.35 BTC) |
||||||
|
* * 00: special txout type pay-to-pubkey-hash |
||||||
|
* * 61b01caab50f1b8e9c50a5057eb43c2d9563a4ee: address uint160 |
||||||
|
* - vout[16]: bbd123008c988f1a4a4de2161e0f50aac7f17e7f9555caa4 |
||||||
|
* * bbd123: compact amount representation for 110397 (0.001 BTC) |
||||||
|
* * 00: special txout type pay-to-pubkey-hash |
||||||
|
* * 8c988f1a4a4de2161e0f50aac7f17e7f9555caa4: address uint160 |
||||||
|
* - height = 120891 |
||||||
|
*/ |
||||||
|
class CCoins |
||||||
|
{ |
||||||
|
public: |
||||||
|
// whether transaction is a coinbase
|
||||||
|
bool fCoinBase; |
||||||
|
|
||||||
|
// unspent transaction outputs; spent outputs are .IsNull(); spent outputs at the end of the array are dropped
|
||||||
|
std::vector<CTxOut> vout; |
||||||
|
|
||||||
|
// at which height this transaction was included in the active block chain
|
||||||
|
int nHeight; |
||||||
|
|
||||||
|
// version of the CTransaction; accesses to this value should probably check for nHeight as well,
|
||||||
|
// as new tx version will probably only be introduced at certain heights
|
||||||
|
int nVersion; |
||||||
|
|
||||||
|
// construct a CCoins from a CTransaction, at a given height
|
||||||
|
CCoins(const CTransaction &tx, int nHeightIn) : fCoinBase(tx.IsCoinBase()), vout(tx.vout), nHeight(nHeightIn), nVersion(tx.nVersion) { } |
||||||
|
|
||||||
|
// empty constructor
|
||||||
|
CCoins() : fCoinBase(false), vout(0), nHeight(0), nVersion(0) { } |
||||||
|
|
||||||
|
// remove spent outputs at the end of vout
|
||||||
|
void Cleanup() { |
||||||
|
while (vout.size() > 0 && vout.back().IsNull()) |
||||||
|
vout.pop_back(); |
||||||
|
if (vout.empty()) |
||||||
|
std::vector<CTxOut>().swap(vout); |
||||||
|
} |
||||||
|
|
||||||
|
void swap(CCoins &to) { |
||||||
|
std::swap(to.fCoinBase, fCoinBase); |
||||||
|
to.vout.swap(vout); |
||||||
|
std::swap(to.nHeight, nHeight); |
||||||
|
std::swap(to.nVersion, nVersion); |
||||||
|
} |
||||||
|
|
||||||
|
// equality test
|
||||||
|
friend bool operator==(const CCoins &a, const CCoins &b) { |
||||||
|
return a.fCoinBase == b.fCoinBase && |
||||||
|
a.nHeight == b.nHeight && |
||||||
|
a.nVersion == b.nVersion && |
||||||
|
a.vout == b.vout; |
||||||
|
} |
||||||
|
friend bool operator!=(const CCoins &a, const CCoins &b) { |
||||||
|
return !(a == b); |
||||||
|
} |
||||||
|
|
||||||
|
// calculate number of bytes for the bitmask, and its number of non-zero bytes
|
||||||
|
// each bit in the bitmask represents the availability of one output, but the
|
||||||
|
// availabilities of the first two outputs are encoded separately
|
||||||
|
void CalcMaskSize(unsigned int &nBytes, unsigned int &nNonzeroBytes) const { |
||||||
|
unsigned int nLastUsedByte = 0; |
||||||
|
for (unsigned int b = 0; 2+b*8 < vout.size(); b++) { |
||||||
|
bool fZero = true; |
||||||
|
for (unsigned int i = 0; i < 8 && 2+b*8+i < vout.size(); i++) { |
||||||
|
if (!vout[2+b*8+i].IsNull()) { |
||||||
|
fZero = false; |
||||||
|
continue; |
||||||
|
} |
||||||
|
} |
||||||
|
if (!fZero) { |
||||||
|
nLastUsedByte = b + 1; |
||||||
|
nNonzeroBytes++; |
||||||
|
} |
||||||
|
} |
||||||
|
nBytes += nLastUsedByte; |
||||||
|
} |
||||||
|
|
||||||
|
bool IsCoinBase() const { |
||||||
|
return fCoinBase; |
||||||
|
} |
||||||
|
|
||||||
|
unsigned int GetSerializeSize(int nType, int nVersion) const { |
||||||
|
unsigned int nSize = 0; |
||||||
|
unsigned int nMaskSize = 0, nMaskCode = 0; |
||||||
|
CalcMaskSize(nMaskSize, nMaskCode); |
||||||
|
bool fFirst = vout.size() > 0 && !vout[0].IsNull(); |
||||||
|
bool fSecond = vout.size() > 1 && !vout[1].IsNull(); |
||||||
|
assert(fFirst || fSecond || nMaskCode); |
||||||
|
unsigned int nCode = 8*(nMaskCode - (fFirst || fSecond ? 0 : 1)) + (fCoinBase ? 1 : 0) + (fFirst ? 2 : 0) + (fSecond ? 4 : 0); |
||||||
|
// version
|
||||||
|
nSize += ::GetSerializeSize(VARINT(this->nVersion), nType, nVersion); |
||||||
|
// size of header code
|
||||||
|
nSize += ::GetSerializeSize(VARINT(nCode), nType, nVersion); |
||||||
|
// spentness bitmask
|
||||||
|
nSize += nMaskSize; |
||||||
|
// txouts themself
|
||||||
|
for (unsigned int i = 0; i < vout.size(); i++) |
||||||
|
if (!vout[i].IsNull()) |
||||||
|
nSize += ::GetSerializeSize(CTxOutCompressor(REF(vout[i])), nType, nVersion); |
||||||
|
// height
|
||||||
|
nSize += ::GetSerializeSize(VARINT(nHeight), nType, nVersion); |
||||||
|
return nSize; |
||||||
|
} |
||||||
|
|
||||||
|
template<typename Stream> |
||||||
|
void Serialize(Stream &s, int nType, int nVersion) const { |
||||||
|
unsigned int nMaskSize = 0, nMaskCode = 0; |
||||||
|
CalcMaskSize(nMaskSize, nMaskCode); |
||||||
|
bool fFirst = vout.size() > 0 && !vout[0].IsNull(); |
||||||
|
bool fSecond = vout.size() > 1 && !vout[1].IsNull(); |
||||||
|
assert(fFirst || fSecond || nMaskCode); |
||||||
|
unsigned int nCode = 8*(nMaskCode - (fFirst || fSecond ? 0 : 1)) + (fCoinBase ? 1 : 0) + (fFirst ? 2 : 0) + (fSecond ? 4 : 0); |
||||||
|
// version
|
||||||
|
::Serialize(s, VARINT(this->nVersion), nType, nVersion); |
||||||
|
// header code
|
||||||
|
::Serialize(s, VARINT(nCode), nType, nVersion); |
||||||
|
// spentness bitmask
|
||||||
|
for (unsigned int b = 0; b<nMaskSize; b++) { |
||||||
|
unsigned char chAvail = 0; |
||||||
|
for (unsigned int i = 0; i < 8 && 2+b*8+i < vout.size(); i++) |
||||||
|
if (!vout[2+b*8+i].IsNull()) |
||||||
|
chAvail |= (1 << i); |
||||||
|
::Serialize(s, chAvail, nType, nVersion); |
||||||
|
} |
||||||
|
// txouts themself
|
||||||
|
for (unsigned int i = 0; i < vout.size(); i++) { |
||||||
|
if (!vout[i].IsNull()) |
||||||
|
::Serialize(s, CTxOutCompressor(REF(vout[i])), nType, nVersion); |
||||||
|
} |
||||||
|
// coinbase height
|
||||||
|
::Serialize(s, VARINT(nHeight), nType, nVersion); |
||||||
|
} |
||||||
|
|
||||||
|
template<typename Stream> |
||||||
|
void Unserialize(Stream &s, int nType, int nVersion) { |
||||||
|
unsigned int nCode = 0; |
||||||
|
// version
|
||||||
|
::Unserialize(s, VARINT(this->nVersion), nType, nVersion); |
||||||
|
// header code
|
||||||
|
::Unserialize(s, VARINT(nCode), nType, nVersion); |
||||||
|
fCoinBase = nCode & 1; |
||||||
|
std::vector<bool> vAvail(2, false); |
||||||
|
vAvail[0] = nCode & 2; |
||||||
|
vAvail[1] = nCode & 4; |
||||||
|
unsigned int nMaskCode = (nCode / 8) + ((nCode & 6) != 0 ? 0 : 1); |
||||||
|
// spentness bitmask
|
||||||
|
while (nMaskCode > 0) { |
||||||
|
unsigned char chAvail = 0; |
||||||
|
::Unserialize(s, chAvail, nType, nVersion); |
||||||
|
for (unsigned int p = 0; p < 8; p++) { |
||||||
|
bool f = (chAvail & (1 << p)) != 0; |
||||||
|
vAvail.push_back(f); |
||||||
|
} |
||||||
|
if (chAvail != 0) |
||||||
|
nMaskCode--; |
||||||
|
} |
||||||
|
// txouts themself
|
||||||
|
vout.assign(vAvail.size(), CTxOut()); |
||||||
|
for (unsigned int i = 0; i < vAvail.size(); i++) { |
||||||
|
if (vAvail[i]) |
||||||
|
::Unserialize(s, REF(CTxOutCompressor(vout[i])), nType, nVersion); |
||||||
|
} |
||||||
|
// coinbase height
|
||||||
|
::Unserialize(s, VARINT(nHeight), nType, nVersion); |
||||||
|
Cleanup(); |
||||||
|
} |
||||||
|
|
||||||
|
// mark an outpoint spent, and construct undo information
|
||||||
|
bool Spend(const COutPoint &out, CTxInUndo &undo) { |
||||||
|
if (out.n >= vout.size()) |
||||||
|
return false; |
||||||
|
if (vout[out.n].IsNull()) |
||||||
|
return false; |
||||||
|
undo = CTxInUndo(vout[out.n]); |
||||||
|
vout[out.n].SetNull(); |
||||||
|
Cleanup(); |
||||||
|
if (vout.size() == 0) { |
||||||
|
undo.nHeight = nHeight; |
||||||
|
undo.fCoinBase = fCoinBase; |
||||||
|
undo.nVersion = this->nVersion; |
||||||
|
} |
||||||
|
return true; |
||||||
|
} |
||||||
|
|
||||||
|
// mark a vout spent
|
||||||
|
bool Spend(int nPos) { |
||||||
|
CTxInUndo undo; |
||||||
|
COutPoint out(0, nPos); |
||||||
|
return Spend(out, undo); |
||||||
|
} |
||||||
|
|
||||||
|
// check whether a particular output is still available
|
||||||
|
bool IsAvailable(unsigned int nPos) const { |
||||||
|
return (nPos < vout.size() && !vout[nPos].IsNull()); |
||||||
|
} |
||||||
|
|
||||||
|
// check whether the entire CCoins is spent
|
||||||
|
// note that only !IsPruned() CCoins can be serialized
|
||||||
|
bool IsPruned() const { |
||||||
|
BOOST_FOREACH(const CTxOut &out, vout) |
||||||
|
if (!out.IsNull()) |
||||||
|
return false; |
||||||
|
return true; |
||||||
|
} |
||||||
|
}; |
||||||
|
|
||||||
|
|
||||||
|
/** 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. |
||||||
|
*/ |
||||||
|
class CBlockHeader |
||||||
|
{ |
||||||
|
public: |
||||||
|
// header
|
||||||
|
static const int CURRENT_VERSION=2; |
||||||
|
int nVersion; |
||||||
|
uint256 hashPrevBlock; |
||||||
|
uint256 hashMerkleRoot; |
||||||
|
unsigned int nTime; |
||||||
|
unsigned int nBits; |
||||||
|
unsigned int nNonce; |
||||||
|
|
||||||
|
CBlockHeader() |
||||||
|
{ |
||||||
|
SetNull(); |
||||||
|
} |
||||||
|
|
||||||
|
IMPLEMENT_SERIALIZE |
||||||
|
( |
||||||
|
READWRITE(this->nVersion); |
||||||
|
nVersion = this->nVersion; |
||||||
|
READWRITE(hashPrevBlock); |
||||||
|
READWRITE(hashMerkleRoot); |
||||||
|
READWRITE(nTime); |
||||||
|
READWRITE(nBits); |
||||||
|
READWRITE(nNonce); |
||||||
|
) |
||||||
|
|
||||||
|
void SetNull() |
||||||
|
{ |
||||||
|
nVersion = CBlockHeader::CURRENT_VERSION; |
||||||
|
hashPrevBlock = 0; |
||||||
|
hashMerkleRoot = 0; |
||||||
|
nTime = 0; |
||||||
|
nBits = 0; |
||||||
|
nNonce = 0; |
||||||
|
} |
||||||
|
|
||||||
|
bool IsNull() const |
||||||
|
{ |
||||||
|
return (nBits == 0); |
||||||
|
} |
||||||
|
|
||||||
|
uint256 GetHash() const |
||||||
|
{ |
||||||
|
return Hash(BEGIN(nVersion), END(nNonce)); |
||||||
|
} |
||||||
|
|
||||||
|
int64 GetBlockTime() const |
||||||
|
{ |
||||||
|
return (int64)nTime; |
||||||
|
} |
||||||
|
}; |
||||||
|
|
||||||
|
#endif |
||||||
Loading…
Reference in new issue