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Break validation <-> txmempool circular dependency

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No behavior change.

Parameterize removeForReorg using a CChain and callable that
encapsulates validation logic.  The mempool shouldn't need to know a
bunch of details about coinbase maturity and lock finality. Instead,
just pass in a callable function that says true/false. Breaks circular
dependency by removing txmempool's dependency on validation.
This commit is contained in:
glozow
2021-09-29 20:52:04 +01:00
parent 64e4963c63
commit a64078e385
4 changed files with 37 additions and 38 deletions
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33
src/validation.cpp
View File

@@ -350,8 +350,39 @@ void CChainState::MaybeUpdateMempoolForReorg(
// the disconnectpool that were added back and cleans up the mempool state.
m_mempool->UpdateTransactionsFromBlock(vHashUpdate);
const auto check_final_and_mature = [this, flags=STANDARD_LOCKTIME_VERIFY_FLAGS](CTxMemPool::txiter it)
EXCLUSIVE_LOCKS_REQUIRED(m_mempool->cs, ::cs_main) {
bool should_remove = false;
AssertLockHeld(m_mempool->cs);
AssertLockHeld(::cs_main);
const CTransaction& tx = it->GetTx();
LockPoints lp = it->GetLockPoints();
bool validLP = TestLockPointValidity(m_chain, &lp);
CCoinsViewMemPool view_mempool(&CoinsTip(), *m_mempool);
if (!CheckFinalTx(m_chain.Tip(), tx, flags)
|| !CheckSequenceLocks(m_chain.Tip(), view_mempool, tx, flags, &lp, validLP)) {
// Note if CheckSequenceLocks fails the LockPoints may still be invalid
// So it's critical that we remove the tx and not depend on the LockPoints.
should_remove = true;
} else if (it->GetSpendsCoinbase()) {
for (const CTxIn& txin : tx.vin) {
auto it2 = m_mempool->mapTx.find(txin.prevout.hash);
if (it2 != m_mempool->mapTx.end())
continue;
const Coin &coin = CoinsTip().AccessCoin(txin.prevout);
assert(!coin.IsSpent());
unsigned int nMemPoolHeight = m_chain.Tip()->nHeight + 1;
if (coin.IsSpent() || (coin.IsCoinBase() && ((signed long)nMemPoolHeight) - coin.nHeight < COINBASE_MATURITY)) {
should_remove = true;
break;
}
}
}
return should_remove;
};
// We also need to remove any now-immature transactions
m_mempool->removeForReorg(*this, STANDARD_LOCKTIME_VERIFY_FLAGS);
m_mempool->removeForReorg(m_chain, check_final_and_mature);
// Re-limit mempool size, in case we added any transactions
LimitMempoolSize(
*m_mempool,