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Add PSBT::ComputeLockTime()

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Function to compute the lock time for the transaction
This commit is contained in:
Andrew Chow 2021-01-11 16:15:04 -05:00
parent 3c647b7a54
commit 10bf24726b
2 changed files with 36 additions and 0 deletions
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35
src/psbt.cpp
View file

@ -45,6 +45,41 @@ bool PartiallySignedTransaction::Merge(const PartiallySignedTransaction& psbt)
return true;
}
bool PartiallySignedTransaction::ComputeTimeLock(uint32_t& locktime) const
{
Optional<uint32_t> time_lock{0};
Optional<uint32_t> height_lock{0};
for (const PSBTInput& input : inputs) {
if (input.time_locktime != nullopt && input.height_locktime == nullopt) {
height_lock.reset(); // Transaction can no longer have a height locktime
if (time_lock == nullopt) {
return false;
}
} else if (input.time_locktime == nullopt && input.height_locktime != nullopt) {
time_lock.reset(); // Transaction can no longer have a time locktime
if (height_lock == nullopt) {
return false;
}
}
if (input.time_locktime && time_lock != nullopt) {
time_lock = std::max(time_lock, input.time_locktime);
}
if (input.height_locktime && height_lock != nullopt) {
height_lock = std::max(height_lock, input.height_locktime);
}
}
if (height_lock != nullopt && *height_lock > 0) {
locktime = *height_lock;
return true;
}
if (time_lock != nullopt && *time_lock > 0) {
locktime = *time_lock;
return true;
}
locktime = fallback_locktime.value_or(0);
return true;
}
bool PartiallySignedTransaction::AddInput(const CTxIn& txin, PSBTInput& psbtin)
{
if (std::find(tx->vin.begin(), tx->vin.end(), txin) != tx->vin.end()) {

1
src/psbt.h
View file

@ -741,6 +741,7 @@ struct PartiallySignedTransaction
bool AddOutput(const CTxOut& txout, const PSBTOutput& psbtout);
void SetupFromTx(const CMutableTransaction& tx);
void CacheUnsignedTxPieces();
bool ComputeTimeLock(uint32_t& locktime) const;
PartiallySignedTransaction() {}
explicit PartiallySignedTransaction(const CMutableTransaction& tx);