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Spent per txout

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Change some internal data structures to keep track of spentness of each wallet transaction output separately, to support partially-spent transactions:
* an update to the data structures (vfSpent in CWalletTx instead of fSpent)
* a backward-compatible update to the wallet disk format. Old clients reading back an updated wallet will ignore partially spent transactions when creating new ones, and may report a wrong balance, though.
* some helper functions (CWalletTx: IsSpent, MarkSpent, MarkDirty to reset cached values, GetAvailableCredit which only counts unredeemed outputs)
This commit is contained in:
Pieter Wuille 2011-03-17 22:51:59 +01:00
parent b7ebc662eb
commit 335e878be8
2 changed files with 147 additions and 43 deletions
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42
main.cpp
View file

@ -136,11 +136,7 @@ bool AddToWallet(const CWalletTx& wtxIn)
wtx.fFromMe = wtxIn.fFromMe;
fUpdated = true;
}
if (wtxIn.fSpent && wtxIn.fSpent != wtx.fSpent)
{
wtx.fSpent = wtxIn.fSpent;
fUpdated = true;
}
fUpdated |= wtx.UpdateSpent(wtxIn.vfSpent);
}
//// debug print
@ -221,10 +217,10 @@ void WalletUpdateSpent(const COutPoint& prevout)
if (mi != mapWallet.end())
{
CWalletTx& wtx = (*mi).second;
if (!wtx.fSpent && wtx.vout[prevout.n].IsMine())
if (!wtx.IsSpent(prevout.n) && wtx.vout[prevout.n].IsMine())
{
printf("WalletUpdateSpent found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
wtx.fSpent = true;
wtx.MarkSpent(prevout.n);
wtx.WriteToDisk();
vWalletUpdated.push_back(prevout.hash);
}
@ -939,15 +935,14 @@ void ReacceptWalletTransactions()
foreach(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
{
CWalletTx& wtx = item.second;
if (wtx.fSpent && wtx.IsCoinBase())
if (wtx.IsCoinBase() && wtx.IsSpent(0))
continue;
CTxIndex txindex;
bool fUpdated = false;
if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
{
// Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
if (!wtx.fSpent)
{
if (txindex.vSpent.size() != wtx.vout.size())
{
printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
@ -957,17 +952,18 @@ void ReacceptWalletTransactions()
{
if (!txindex.vSpent[i].IsNull() && wtx.vout[i].IsMine())
{
wtx.fSpent = true;
wtx.MarkSpent(i);
fUpdated = true;
vMissingTx.push_back(txindex.vSpent[i]);
}
}
if (wtx.fSpent)
if (fUpdated)
{
printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
wtx.MarkDirty();
wtx.WriteToDisk();
}
}
}
else
{
// Reaccept any txes of ours that aren't already in a block
@ -3732,9 +3728,9 @@ int64 GetBalance()
for (map<uint256, CWalletTx>::iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
{
CWalletTx* pcoin = &(*it).second;
if (!pcoin->IsFinal() || pcoin->fSpent || !pcoin->IsConfirmed())
if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
continue;
nTotal += pcoin->GetCredit();
nTotal += pcoin->GetAvailableCredit();
}
}
@ -3763,14 +3759,17 @@ bool SelectCoinsMinConf(int64 nTargetValue, int nConfMine, int nConfTheirs, set<
foreach(CWalletTx* pcoin, vCoins)
{
if (!pcoin->IsFinal() || pcoin->fSpent || !pcoin->IsConfirmed())
if (!pcoin->IsFinal() || !pcoin->IsConfirmed())
continue;
if (pcoin->IsCoinBase() && pcoin->GetBlocksToMaturity() > 0)
continue;
int nDepth = pcoin->GetDepthInMainChain();
if (nDepth < (pcoin->IsFromMe() ? nConfMine : nConfTheirs))
continue;
int64 n = pcoin->GetCredit();
int64 n = pcoin->GetAvailableCredit();
if (n <= 0)
continue;
if (n == nTargetValue)
@ -4017,12 +4016,11 @@ bool CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey)
// Mark old coins as spent
set<CWalletTx*> setCoins;
foreach(const CTxIn& txin, wtxNew.vin)
setCoins.insert(&mapWallet[txin.prevout.hash]);
foreach(CWalletTx* pcoin, setCoins)
{
pcoin->fSpent = true;
pcoin->WriteToDisk();
vWalletUpdated.push_back(pcoin->GetHash());
CWalletTx &pcoin = mapWallet[txin.prevout.hash];
pcoin.MarkSpent(txin.prevout.n);
pcoin.WriteToDisk();
vWalletUpdated.push_back(pcoin.GetHash());
}
}

122
main.h
View file

@ -738,6 +738,7 @@ public:
fMerkleVerified = false;
}
IMPLEMENT_SERIALIZE
(
nSerSize += SerReadWrite(s, *(CTransaction*)this, nType, nVersion, ser_action);
@ -774,15 +775,17 @@ public:
unsigned int fTimeReceivedIsTxTime;
unsigned int nTimeReceived; // time received by this node
char fFromMe;
char fSpent;
string strFromAccount;
vector<char> vfSpent;
// memory only
mutable char fDebitCached;
mutable char fCreditCached;
mutable char fAvailableCreditCached;
mutable char fChangeCached;
mutable int64 nDebitCached;
mutable int64 nCreditCached;
mutable int64 nAvailableCreditCached;
mutable int64 nChangeCached;
// memory only UI hints
@ -814,13 +817,15 @@ public:
fTimeReceivedIsTxTime = false;
nTimeReceived = 0;
fFromMe = false;
fSpent = false;
strFromAccount.clear();
vfSpent.clear();
fDebitCached = false;
fCreditCached = false;
fAvailableCreditCached = false;
fChangeCached = false;
nDebitCached = 0;
nCreditCached = 0;
nAvailableCreditCached = 0;
nChangeCached = 0;
nTimeDisplayed = 0;
nLinesDisplayed = 0;
@ -832,22 +837,96 @@ public:
CWalletTx* pthis = const_cast<CWalletTx*>(this);
if (fRead)
pthis->Init();
char fSpent = false;
if (!fRead)
{
pthis->mapValue["fromaccount"] = pthis->strFromAccount;
string str;
foreach(char f, vfSpent)
{
str += (f ? '1' : '0');
if (f)
fSpent = true;
}
pthis->mapValue["spent"] = str;
}
nSerSize += SerReadWrite(s, *(CMerkleTx*)this, nType, nVersion,ser_action);
READWRITE(vtxPrev);
pthis->mapValue["fromaccount"] = pthis->strFromAccount;
READWRITE(mapValue);
pthis->strFromAccount = pthis->mapValue["fromaccount"];
pthis->mapValue.erase("fromaccount");
pthis->mapValue.erase("version");
READWRITE(vOrderForm);
READWRITE(fTimeReceivedIsTxTime);
READWRITE(nTimeReceived);
READWRITE(fFromMe);
READWRITE(fSpent);
if (fRead)
{
pthis->strFromAccount = pthis->mapValue["fromaccount"];
if (mapValue.count("spent"))
foreach(char c, pthis->mapValue["spent"])
pthis->vfSpent.push_back(c != '0');
else
pthis->vfSpent.assign(vout.size(), fSpent);
}
pthis->mapValue.erase("fromaccount");
pthis->mapValue.erase("version");
pthis->mapValue.erase("spent");
)
// marks certain txout's as spent
// returns true if any update took place
bool UpdateSpent(const vector<char>& vfNewSpent)
{
bool fReturn = false;
for (int i=0; i < vfNewSpent.size(); i++)
{
if (i == vfSpent.size())
break;
if (vfNewSpent[i] && !vfSpent[i])
{
vfSpent[i] = true;
fReturn = true;
fAvailableCreditCached = false;
}
}
return fReturn;
}
void MarkDirty()
{
fCreditCached = false;
fAvailableCreditCached = false;
fDebitCached = false;
fChangeCached = false;
}
void MarkSpent(unsigned int nOut)
{
if (nOut >= vout.size())
throw runtime_error("CWalletTx::MarkSpent() : nOut out of range");
vfSpent.resize(vout.size());
if (!vfSpent[nOut])
{
vfSpent[nOut] = true;
fAvailableCreditCached = false;
}
}
bool IsSpent(unsigned int nOut) const
{
if (nOut >= vout.size())
throw runtime_error("CWalletTx::IsSpent() : nOut out of range");
if (nOut >= vfSpent.size())
return false;
return (!!vfSpent[nOut]);
}
int64 GetDebit() const
{
if (vin.empty())
@ -873,6 +952,33 @@ public:
return nCreditCached;
}
int64 GetAvailableCredit(bool fUseCache=true) const
{
// Must wait until coinbase is safely deep enough in the chain before valuing it
if (IsCoinBase() && GetBlocksToMaturity() > 0)
return 0;
if (fUseCache && fAvailableCreditCached)
return nAvailableCreditCached;
int64 nCredit = 0;
for (int i = 0; i < vout.size(); i++)
{
if (!IsSpent(i))
{
const CTxOut &txout = vout[i];
nCredit += txout.GetCredit();
if (!MoneyRange(nCredit))
throw runtime_error("CWalletTx::GetAvailableCredit() : value out of range");
}
}
nAvailableCreditCached = nCredit;
fAvailableCreditCached = true;
return nCredit;
}
int64 GetChange() const
{
if (fChangeCached)