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transaction: clarify witness branches

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Daniel Cousens 2016-07-12 13:27:09 +10:00 committed by Daniel Cousens
parent 4831a16223
commit e37b16a75c
1 changed files with 5 additions and 3 deletions
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8
src/primitives/transaction.h
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@ -290,6 +290,8 @@ struct CMutableTransaction;
*/ */
template<typename Stream, typename Operation, typename TxType> template<typename Stream, typename Operation, typename TxType>
inline void SerializeTransaction(TxType& tx, Stream& s, Operation ser_action, int nType, int nVersion) { inline void SerializeTransaction(TxType& tx, Stream& s, Operation ser_action, int nType, int nVersion) {
const bool fAllowWitness = !(nVersion & SERIALIZE_TRANSACTION_NO_WITNESS);
READWRITE(*const_cast<int32_t*>(&tx.nVersion)); READWRITE(*const_cast<int32_t*>(&tx.nVersion));
unsigned char flags = 0; unsigned char flags = 0;
if (ser_action.ForRead()) { if (ser_action.ForRead()) {
@ -298,7 +300,7 @@ inline void SerializeTransaction(TxType& tx, Stream& s, Operation ser_action, in
const_cast<CTxWitness*>(&tx.wit)->SetNull(); const_cast<CTxWitness*>(&tx.wit)->SetNull();
/* Try to read the vin. In case the dummy is there, this will be read as an empty vector. */ /* Try to read the vin. In case the dummy is there, this will be read as an empty vector. */
READWRITE(*const_cast<std::vector<CTxIn>*>(&tx.vin)); READWRITE(*const_cast<std::vector<CTxIn>*>(&tx.vin));
if (tx.vin.size() == 0 && !(nVersion & SERIALIZE_TRANSACTION_NO_WITNESS)) { if (tx.vin.size() == 0 && fAllowWitness) {
/* We read a dummy or an empty vin. */ /* We read a dummy or an empty vin. */
READWRITE(flags); READWRITE(flags);
if (flags != 0) { if (flags != 0) {
@ -309,7 +311,7 @@ inline void SerializeTransaction(TxType& tx, Stream& s, Operation ser_action, in
/* We read a non-empty vin. Assume a normal vout follows. */ /* We read a non-empty vin. Assume a normal vout follows. */
READWRITE(*const_cast<std::vector<CTxOut>*>(&tx.vout)); READWRITE(*const_cast<std::vector<CTxOut>*>(&tx.vout));
} }
if ((flags & 1) && !(nVersion & SERIALIZE_TRANSACTION_NO_WITNESS)) { if ((flags & 1) && fAllowWitness) {
/* The witness flag is present, and we support witnesses. */ /* The witness flag is present, and we support witnesses. */
flags ^= 1; flags ^= 1;
const_cast<CTxWitness*>(&tx.wit)->vtxinwit.resize(tx.vin.size()); const_cast<CTxWitness*>(&tx.wit)->vtxinwit.resize(tx.vin.size());
@ -322,7 +324,7 @@ inline void SerializeTransaction(TxType& tx, Stream& s, Operation ser_action, in
} else { } else {
// Consistency check // Consistency check
assert(tx.wit.vtxinwit.size() <= tx.vin.size()); assert(tx.wit.vtxinwit.size() <= tx.vin.size());
if (!(nVersion & SERIALIZE_TRANSACTION_NO_WITNESS)) { if (fAllowWitness) {
/* Check whether witnesses need to be serialized. */ /* Check whether witnesses need to be serialized. */
if (!tx.wit.IsNull()) { if (!tx.wit.IsNull()) {
flags |= 1; flags |= 1;