highperfocused/bitcoin
1
0
Fork 0
mirror of https://github.com/bitcoin/bitcoin.git synced 2026-04-19 19:29:45 +02:00
Code Issues Packages Projects Releases Wiki Activity

MOVEONLY: check that fees > direct conflicts to policy/rbf

Browse Source
This commit is contained in:
glozow
2021-08-11 15:51:27 +01:00
parent 3f033f01a6
commit 9c2f9f8984
3 changed files with 43 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
src/policy/rbf.cpp
View File

@@ -129,3 +129,35 @@ std::optional<std::string> EntriesAndTxidsDisjoint(const CTxMemPool::setEntries&
}
return std::nullopt;
}
std::optional<std::string> PaysMoreThanConflicts(const CTxMemPool::setEntries& setIterConflicting,
CFeeRate newFeeRate,
const uint256& hash)
{
for (const auto& mi : setIterConflicting) {
// Don't allow the replacement to reduce the feerate of the
// mempool.
//
// We usually don't want to accept replacements with lower
// feerates than what they replaced as that would lower the
// feerate of the next block. Requiring that the feerate always
// be increased is also an easy-to-reason about way to prevent
// DoS attacks via replacements.
//
// We only consider the feerates of transactions being directly
// replaced, not their indirect descendants. While that does
// mean high feerate children are ignored when deciding whether
// or not to replace, we do require the replacement to pay more
// overall fees too, mitigating most cases.
CFeeRate oldFeeRate(mi->GetModifiedFee(), mi->GetTxSize());
if (newFeeRate <= oldFeeRate)
{
return strprintf("rejecting replacement %s; new feerate %s <= old feerate %s",
hash.ToString(),
newFeeRate.ToString(),
oldFeeRate.ToString());
}
}
return std::nullopt;
}