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Cache witness hash in CTransaction

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This commit is contained in:
MarcoFalke 2018-04-09 19:16:24 -04:00
parent faab55fbb1
commit fac1223a56
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GPG key ID: CE2B75697E69A548
2 changed files with 9 additions and 11 deletions
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10
src/primitives/transaction.cpp
View file

@ -67,18 +67,18 @@ uint256 CTransaction::ComputeHash() const
return SerializeHash(*this, SER_GETHASH, SERIALIZE_TRANSACTION_NO_WITNESS);
}
uint256 CTransaction::GetWitnessHash() const
uint256 CTransaction::ComputeWitnessHash() const
{
if (!HasWitness()) {
return GetHash();
return hash;
}
return SerializeHash(*this, SER_GETHASH, 0);
}
/* For backward compatibility, the hash is initialized to 0. TODO: remove the need for this default constructor entirely. */
CTransaction::CTransaction() : vin(), vout(), nVersion(CTransaction::CURRENT_VERSION), nLockTime(0), hash() {}
CTransaction::CTransaction(const CMutableTransaction &tx) : vin(tx.vin), vout(tx.vout), nVersion(tx.nVersion), nLockTime(tx.nLockTime), hash(ComputeHash()) {}
CTransaction::CTransaction(CMutableTransaction &&tx) : vin(std::move(tx.vin)), vout(std::move(tx.vout)), nVersion(tx.nVersion), nLockTime(tx.nLockTime), hash(ComputeHash()) {}
CTransaction::CTransaction() : vin(), vout(), nVersion(CTransaction::CURRENT_VERSION), nLockTime(0), hash{}, m_witness_hash{} {}
CTransaction::CTransaction(const CMutableTransaction& tx) : vin(tx.vin), vout(tx.vout), nVersion(tx.nVersion), nLockTime(tx.nLockTime), hash{ComputeHash()}, m_witness_hash{ComputeWitnessHash()} {}
CTransaction::CTransaction(CMutableTransaction&& tx) : vin(std::move(tx.vin)), vout(std::move(tx.vout)), nVersion(tx.nVersion), nLockTime(tx.nLockTime), hash{ComputeHash()}, m_witness_hash{ComputeWitnessHash()} {}
CAmount CTransaction::GetValueOut() const
{

10
src/primitives/transaction.h
View file

@ -286,8 +286,10 @@ public:
private:
/** Memory only. */
const uint256 hash;
const uint256 m_witness_hash;
uint256 ComputeHash() const;
uint256 ComputeWitnessHash() const;
public:
/** Construct a CTransaction that qualifies as IsNull() */
@ -311,12 +313,8 @@ public:
return vin.empty() && vout.empty();
}
const uint256& GetHash() const {
return hash;
}
// Compute a hash that includes both transaction and witness data
uint256 GetWitnessHash() const;
const uint256& GetHash() const { return hash; }
const uint256& GetWitnessHash() const { return m_witness_hash; };
// Return sum of txouts.
CAmount GetValueOut() const;