Tx BlockDataViewer::getPrevTx(TxIn & txin) const
{
if (txin.isCoinbase())
return Tx();
OutPoint op = txin.getOutPoint();
return getTxByHash(op.getTxHash());
}
TxOut BlockDataViewer::getPrevTxOut(TxIn & txin) const
{
if (txin.isCoinbase())
return TxOut();
OutPoint op = txin.getOutPoint();
Tx theTx = getTxByHash(op.getTxHash());
if (!theTx.isInitialized())
throw runtime_error("couldn't find prev tx");
uint32_t idx = op.getTxOutIndex();
return theTx.getTxOutCopy(idx);
}
map<BinaryData, map<BinaryData, TxIOPair> >
ZeroConfContainer::ZCisMineBulkFilter(const Tx & tx,
const BinaryData & ZCkey, uint32_t txtime,
function<bool(const BinaryData&)> filter,
bool withSecondOrderMultisig)
{
// Since 99.999%+ of all transactions are not ours, let's do the
// fastest bulk filter possible, even though it will add
// redundant computation to the tx that are ours. In fact,
// we will skip the TxIn/TxOut convenience methods and follow the
// pointers directly to the data we want
/***filter is a pointer to a function that takes in a scrAddr (21 bytes,
including the prefix) and returns a bool. For supernode, it should return
true all the time.
***/
map<BinaryData, map<BinaryData, TxIOPair> > processedTxIO;
BinaryData txHash = tx.getThisHash();
TxRef txref = db_->getTxRef(txHash);
if (txref.isInitialized())
{
//Found this tx in the db. It is already part of a block thus
//is invalid as a ZC
return processedTxIO;
}
uint8_t const * txStartPtr = tx.getPtr();
for (uint32_t iin = 0; iin<tx.getNumTxIn(); iin++)
{
// We have the txin, now check if it contains one of our TxOuts
OutPoint op;
op.unserialize(txStartPtr + tx.getTxInOffset(iin), 36);
//check ZC txhash first, always cheaper than grabing a stxo from DB,
//and will always be checked if the tx doesn't hit in DB outpoints.
{
BinaryData opZcKey;
if (getKeyForTxHash(op.getTxHash(), opZcKey))
{
TxRef outPointRef(opZcKey);
uint16_t outPointId = op.getTxOutIndex();
TxIOPair txio(outPointRef, outPointId,
TxRef(ZCkey), iin);
Tx chainedZC = getTxByHash(op.getTxHash());
const TxOut& chainedTxOut = chainedZC.getTxOutCopy(outPointId);
txio.setTxHashOfOutput(op.getTxHash());
txio.setTxHashOfInput(txHash);
txio.setValue(chainedTxOut.getValue());
txio.setTxTime(txtime);
BinaryData spentSA = chainedTxOut.getScrAddressStr();
auto& key_txioPair = processedTxIO[spentSA];
key_txioPair[txio.getDBKeyOfOutput()] = txio;
auto& wltIdVec = keyToSpentScrAddr_[ZCkey];
wltIdVec.push_back(spentSA);
txOutsSpentByZC_.insert(txio.getDBKeyOfOutput());
continue;
}
}
//fetch the TxOut from DB
BinaryData opKey = op.getDBkey(db_);
if (opKey.getSize() == 8)
{
//found outPoint DBKey, grab the StoredTxOut
StoredTxOut stxOut;
if (db_->getStoredTxOut(stxOut, opKey))
{
BinaryData sa = stxOut.getScrAddress();
if (filter(sa))
{
TxIOPair txio(TxRef(opKey.getSliceRef(0, 6)), op.getTxOutIndex(),
TxRef(ZCkey), iin);
txio.setTxHashOfOutput(op.getTxHash());
txio.setTxHashOfInput(txHash);
txio.setValue(stxOut.getValue());
txio.setTxTime(txtime);
auto& key_txioPair = processedTxIO[sa];
key_txioPair[opKey] = txio;
auto& wltIdVec = keyToSpentScrAddr_[ZCkey];
wltIdVec.push_back(sa);
txOutsSpentByZC_.insert(opKey);
}
}
}
}
// Simply convert the TxOut scripts to scrAddrs and check if registered
for (uint32_t iout = 0; iout<tx.getNumTxOut(); iout++)
{
TxOut txout = tx.getTxOutCopy(iout);
BinaryData scrAddr = txout.getScrAddressStr();
if (filter(scrAddr))
{
TxIOPair txio(TxRef(ZCkey), iout);
txio.setValue(txout.getValue());
txio.setTxHashOfOutput(txHash);
txio.setTxTime(txtime);
txio.setUTXO(true);
auto& key_txioPair = processedTxIO[scrAddr];
key_txioPair[txio.getDBKeyOfOutput()] = txio;
continue;
}
// It's still possible this is a multisig addr involving one of our
// existing scrAddrs, even if we aren't explicitly looking for this multisig
if (withSecondOrderMultisig && txout.getScriptType() ==
TXOUT_SCRIPT_MULTISIG)
{
BinaryRefReader brrmsig(scrAddr);
uint8_t PREFIX = brrmsig.get_uint8_t();
(void)PREFIX;
uint8_t M = brrmsig.get_uint8_t();
(void)M;
uint8_t N = brrmsig.get_uint8_t();
for (uint8_t a = 0; a<N; a++)
if (filter(HASH160PREFIX + brrmsig.get_BinaryDataRef(20)))
{
TxIOPair txio(TxRef(ZCkey), iout);
txio.setTxHashOfOutput(txHash);
txio.setValue(txout.getValue());
txio.setTxTime(txtime);
txio.setUTXO(true);
txio.setMultisig(true);
auto& key_txioPair = processedTxIO[scrAddr];
key_txioPair[txio.getDBKeyOfOutput()] = txio;
}
}
}
// If we got here, it's either non std or not ours
return processedTxIO;
}