mirror of
https://github.com/bitcoin/bitcoin.git
synced 2025-11-12 06:58:57 +01:00
Move CCoins-related logic to coins.{cpp.h}
This commit is contained in:
Pieter Wuille
228
src/core.h
228
src/core.h
@@ -12,8 +12,6 @@
|
||||
|
||||
#include <stdint.h>
|
||||
|
||||
#include <boost/foreach.hpp>
|
||||
|
||||
class CTransaction;
|
||||
|
||||
/** An outpoint - a combination of a transaction hash and an index n into its vout */
|
||||
@@ -324,232 +322,6 @@ 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 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) {
|
||||
ClearUnspendable();
|
||||
}
|
||||
|
||||
// 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 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);
|
||||
std::swap(to.nVersion, nVersion);
|
||||
}
|
||||
|
||||
// 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.nVersion == b.nVersion &&
|
||||
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;
|
||||
}
|
||||
|
||||
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);
|
||||
|
||||
// mark a vout spent
|
||||
bool Spend(int 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;
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
/** 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
|
||||
|
||||
Reference in New Issue
Block a user