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zcashd
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Preliminary undo file creation 

Create files (one per block) with undo information for the transactions
in it.
This commit is contained in:
Pieter Wuille 2012-06-23 14:17:13 +02:00
parent 630fd8dcb6
commit 8adf48dc9b
2 changed files with 32 additions and 0 deletions
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17
src/main.cpp
View File

@ -1432,6 +1432,8 @@ bool CBlock::ConnectBlock(CTxDB& txdb, CBlockIndex* pindex, bool fJustCheck)
else
nTxPos = ::GetSerializeSize(CBlock(), SER_DISK, CLIENT_VERSION) - 1 + GetSizeOfCompactSize(vtx.size());
CBlockUndo blockundo;
map<uint256, CTxIndex> mapQueuedChanges;
int64 nFees = 0;
unsigned int nSigOps = 0;
@ -1461,6 +1463,8 @@ bool CBlock::ConnectBlock(CTxDB& txdb, CBlockIndex* pindex, bool fJustCheck)
MapPrevTx mapInputs;
if (!tx.IsCoinBase())
{
CTxUndo undo;
bool fInvalid;
if (!tx.FetchInputs(txdb, mapQueuedChanges, true, false, mapInputs, fInvalid))
return false;
@ -1477,8 +1481,14 @@ bool CBlock::ConnectBlock(CTxDB& txdb, CBlockIndex* pindex, bool fJustCheck)
nFees += tx.GetValueIn(mapInputs)-tx.GetValueOut();
BOOST_FOREACH(const CTxIn &in, tx.vin) {
undo.vprevout.push_back(CTxInUndo(mapInputs[in.prevout.hash].second.vout[in.prevout.n], pindex->nHeight));
}
if (!tx.ConnectInputs(mapInputs, mapQueuedChanges, posThisTx, pindex, true, false, fStrictPayToScriptHash))
return false;
blockundo.vtxundo.push_back(undo);
}
mapQueuedChanges[hashTx] = CTxIndex(posThisTx, tx.vout.size());
@ -1507,6 +1517,13 @@ bool CBlock::ConnectBlock(CTxDB& txdb, CBlockIndex* pindex, bool fJustCheck)
return error("ConnectBlock() : WriteBlockIndex failed");
}
// Write undo information to disk
if (pindex->nHeight > Checkpoints::GetTotalBlocksEstimate())
{
CAutoFile fileUndo(fopen(pindex->GetBlockPos().GetUndoFile(GetDataDir()).string().c_str(), "wb"), SER_DISK, CLIENT_VERSION);
fileUndo << blockundo;
}
// Watch for transactions paying to me
BOOST_FOREACH(CTransaction& tx, vtx)
SyncWithWallets(tx, this, true);

15
src/main.h
View File

@ -155,6 +155,10 @@ public:
return GetDirectory(base) / strprintf("%08u%s.blk", nHeight, GetAlternative().c_str());
}
boost::filesystem::path GetUndoFile(const boost::filesystem::path &base) const {
return GetDirectory(base) / strprintf("%08u%s.und", nHeight, GetAlternative().c_str());
}
// TODO: make thread-safe (lockfile, atomic file creation, ...?)
void MakeUnique(const boost::filesystem::path &base) {
while (boost::filesystem::exists(GetFileName(base)))
@ -810,6 +814,17 @@ public:
)
};
/** Undo information for a CBlock */
class CBlockUndo
{
public:
std::vector<CTxUndo> vtxundo;
IMPLEMENT_SERIALIZE(
READWRITE(vtxundo);
)
};
/** pruned version of CTransaction: only retains metadata and unspent transaction outputs
*
* Serialized format: