diff options
Diffstat (limited to 'src/coins.h')
| -rw-r--r-- | src/coins.h | 167 |
1 files changed, 0 insertions, 167 deletions
diff --git a/src/coins.h b/src/coins.h index ae85a199ca..bd2f2caf27 100644 --- a/src/coins.h +++ b/src/coins.h @@ -82,58 +82,6 @@ public: } }; -/** - * Pruned version of CTransaction: only retains metadata and unspent transaction outputs - * - * Serialized format: - * - VARINT(nVersion) - * - VARINT(nCode) - * - unspentness bitvector, for vout[2] and further; least significant byte first - * - the non-spent CTxOuts (via CTxOutCompressor) - * - VARINT(nHeight) - * - * The nCode value consists of: - * - bit 0: IsCoinBase() - * - bit 1: vout[0] is not spent - * - bit 2: vout[1] is not spent - * - The higher bits encode N, the number of non-zero bytes in the following bitvector. - * - In case both bit 1 and bit 2 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 1 and bit 2 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: @@ -146,98 +94,9 @@ public: //! at which height this transaction was included in the active block chain int nHeight; - void FromTx(const CTransaction &tx, int nHeightIn) { - fCoinBase = tx.IsCoinBase(); - vout = tx.vout; - nHeight = nHeightIn; - ClearUnspendable(); - } - - //! construct a CCoins from a CTransaction, at a given height - CCoins(const CTransaction &tx, int nHeightIn) { - FromTx(tx, nHeightIn); - } - - void Clear() { - fCoinBase = false; - std::vector<CTxOut>().swap(vout); - nHeight = 0; - } - //! empty constructor CCoins() : fCoinBase(false), vout(0), nHeight(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 ClearUnspendable() { - BOOST_FOREACH(CTxOut &txout, vout) { - if (txout.scriptPubKey.IsUnspendable()) - txout.SetNull(); - } - Cleanup(); - } - - void swap(CCoins &to) { - std::swap(to.fCoinBase, fCoinBase); - to.vout.swap(vout); - std::swap(to.nHeight, nHeight); - } - - //! equality test - friend bool operator==(const CCoins &a, const CCoins &b) { - // Empty CCoins objects are always equal. - if (a.IsPruned() && b.IsPruned()) - return true; - return a.fCoinBase == b.fCoinBase && - a.nHeight == b.nHeight && - a.vout == b.vout; - } - friend bool operator!=(const CCoins &a, const CCoins &b) { - return !(a == b); - } - - void CalcMaskSize(unsigned int &nBytes, unsigned int &nNonzeroBytes) const; - - bool IsCoinBase() const { - return fCoinBase; - } - - template<typename Stream> - void Serialize(Stream &s) 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 - int nVersionDummy = 0; - ::Serialize(s, VARINT(nVersionDummy)); - // header code - ::Serialize(s, VARINT(nCode)); - // 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); - } - // txouts themself - for (unsigned int i = 0; i < vout.size(); i++) { - if (!vout[i].IsNull()) - ::Serialize(s, CTxOutCompressor(REF(vout[i]))); - } - // coinbase height - ::Serialize(s, VARINT(nHeight)); - } - template<typename Stream> void Unserialize(Stream &s) { unsigned int nCode = 0; @@ -270,32 +129,6 @@ public: } // coinbase height ::Unserialize(s, VARINT(nHeight)); - Cleanup(); - } - - //! mark a vout spent - bool Spend(uint32_t nPos); - - //! 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; - } - - size_t DynamicMemoryUsage() const { - size_t ret = memusage::DynamicUsage(vout); - BOOST_FOREACH(const CTxOut &out, vout) { - ret += RecursiveDynamicUsage(out.scriptPubKey); - } - return ret; } }; |