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[validation] Cache merkle root and witness commitment checks

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Slight performance improvement by avoiding duplicate work.

Github-Pull: #29412
Rebased-From: 1ec6bbeb8d
This commit is contained in:
dergoegge 2024-02-06 10:07:18 +00:00 • committed by Ava Chow
parent de97ecf14f
commit 0667441a7b
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GPG key ID: 17565732E08E5E41
2 changed files with 12 additions and 2 deletions
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8
src/primitives/block.h
View file

@ -71,8 +71,10 @@ public:
// network and disk
std::vector<CTransactionRef> vtx;
// memory only
mutable bool fChecked;
// Memory-only flags for caching expensive checks
mutable bool fChecked; // CheckBlock()
mutable bool m_checked_witness_commitment{false}; // CheckWitnessCommitment()
mutable bool m_checked_merkle_root{false}; // CheckMerkleRoot()
CBlock()
{
@ -96,6 +98,8 @@ public:
CBlockHeader::SetNull();
vtx.clear();
fChecked = false;
m_checked_witness_commitment = false;
m_checked_merkle_root = false;
}
CBlockHeader GetBlockHeader() const

6
src/validation.cpp
View file

@ -3488,6 +3488,8 @@ static bool CheckBlockHeader(const CBlockHeader& block, BlockValidationState& st
static bool CheckMerkleRoot(const CBlock& block, BlockValidationState& state)
{
if (block.m_checked_merkle_root) return true;
bool mutated;
uint256 hashMerkleRoot2 = BlockMerkleRoot(block, &mutated);
if (block.hashMerkleRoot != hashMerkleRoot2)
@ -3499,12 +3501,15 @@ static bool CheckMerkleRoot(const CBlock& block, BlockValidationState& state)
if (mutated)
return state.Invalid(BlockValidationResult::BLOCK_MUTATED, "bad-txns-duplicate", "duplicate transaction");
block.m_checked_merkle_root = true;
return true;
}
static bool CheckWitnessMalleation(const CBlock& block, bool expect_witness_commitment, BlockValidationState& state)
{
if (expect_witness_commitment) {
if (block.m_checked_witness_commitment) return true;
int commitpos = GetWitnessCommitmentIndex(block);
if (commitpos != NO_WITNESS_COMMITMENT) {
bool malleated = false;
@ -3520,6 +3525,7 @@ static bool CheckWitnessMalleation(const CBlock& block, bool expect_witness_comm
return state.Invalid(BlockValidationResult::BLOCK_MUTATED, "bad-witness-merkle-match", strprintf("%s : witness merkle commitment mismatch", __func__));
}
block.m_checked_witness_commitment = true;
return true;
}
}