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mempool: Calculate descendant maximum thoroughly

This commit is contained in:
Karl-Johan Alm 2018-05-23 09:13:43 +09:00
parent 6d3568371e
commit a08d76bcfe
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GPG Key ID: 57AF762DB3353322
1 changed files with 18 additions and 7 deletions
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25
src/txmempool.cpp
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@ -1056,14 +1056,25 @@ void CTxMemPool::TrimToSize(size_t sizelimit, std::vector<COutPoint>* pvNoSpends
}
uint64_t CTxMemPool::CalculateDescendantMaximum(txiter entry) const {
// find top parent
txiter top = entry;
for (;;) {
const setEntries& parents = GetMemPoolParents(top);
if (parents.size() == 0) break;
top = *parents.begin();
// find parent with highest descendant count
std::vector<txiter> candidates;
setEntries counted;
candidates.push_back(entry);
uint64_t maximum = 0;
while (candidates.size()) {
txiter candidate = candidates.back();
candidates.pop_back();
if (!counted.insert(candidate).second) continue;
const setEntries& parents = GetMemPoolParents(candidate);
if (parents.size() == 0) {
maximum = std::max(maximum, candidate->GetCountWithDescendants());
} else {
for (txiter i : parents) {
candidates.push_back(i);
}
}
}
return top->GetCountWithDescendants();
return maximum;
}
void CTxMemPool::GetTransactionAncestry(const uint256& txid, size_t& ancestors, size_t& descendants) const {