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refactor: mempool: use CTxMempool::Limits

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Simplifies function signatures by removing repetition of all the
ancestor/descendant limits,  and increases readability by being
more verbose by naming the limits, while still reducing the LoC.
This commit is contained in:
stickies-v
2022-09-15 18:11:32 +01:00
parent b85af25f87
commit 3a86f24a4c
7 changed files with 59 additions and 85 deletions
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43
src/validation.cpp
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@@ -424,11 +424,13 @@ namespace {
class MemPoolAccept
{
public:
explicit MemPoolAccept(CTxMemPool& mempool, Chainstate& active_chainstate) : m_pool(mempool), m_view(&m_dummy), m_viewmempool(&active_chainstate.CoinsTip(), m_pool), m_active_chainstate(active_chainstate),
m_limit_ancestors(m_pool.m_limits.ancestor_count),
m_limit_ancestor_size(m_pool.m_limits.ancestor_size_vbytes),
m_limit_descendants(m_pool.m_limits.descendant_count),
m_limit_descendant_size(m_pool.m_limits.descendant_size_vbytes) {
explicit MemPoolAccept(CTxMemPool& mempool, Chainstate& active_chainstate) :
m_pool(mempool),
m_view(&m_dummy),
m_viewmempool(&active_chainstate.CoinsTip(), m_pool),
m_active_chainstate(active_chainstate),
m_limits{m_pool.m_limits}
{
}
// We put the arguments we're handed into a struct, so we can pass them
@@ -660,13 +662,7 @@ private:
Chainstate& m_active_chainstate;
// The package limits in effect at the time of invocation.
const size_t m_limit_ancestors;
const size_t m_limit_ancestor_size;
// These may be modified while evaluating a transaction (eg to account for
// in-mempool conflicts; see below).
size_t m_limit_descendants;
size_t m_limit_descendant_size;
CTxMemPool::Limits m_limits;
/** Whether the transaction(s) would replace any mempool transactions. If so, RBF rules apply. */
bool m_rbf{false};
@@ -879,12 +875,12 @@ bool MemPoolAccept::PreChecks(ATMPArgs& args, Workspace& ws)
assert(ws.m_iters_conflicting.size() == 1);
CTxMemPool::txiter conflict = *ws.m_iters_conflicting.begin();
m_limit_descendants += 1;
m_limit_descendant_size += conflict->GetSizeWithDescendants();
m_limits.descendant_count += 1;
m_limits.descendant_size_vbytes += conflict->GetSizeWithDescendants();
}
std::string errString;
if (!m_pool.CalculateMemPoolAncestors(*entry, ws.m_ancestors, m_limit_ancestors, m_limit_ancestor_size, m_limit_descendants, m_limit_descendant_size, errString)) {
if (!m_pool.CalculateMemPoolAncestors(*entry, ws.m_ancestors, m_limits, errString)) {
ws.m_ancestors.clear();
// If CalculateMemPoolAncestors fails second time, we want the original error string.
std::string dummy_err_string;
@@ -899,8 +895,16 @@ bool MemPoolAccept::PreChecks(ATMPArgs& args, Workspace& ws)
// to be secure by simply only having two immediately-spendable
// outputs - one for each counterparty. For more info on the uses for
// this, see https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2018-November/016518.html
CTxMemPool::Limits cpfp_carve_out_limits{
.ancestor_count = 2,
.ancestor_size_vbytes = m_limits.ancestor_size_vbytes,
.descendant_count = m_limits.descendant_count + 1,
.descendant_size_vbytes = m_limits.descendant_size_vbytes + EXTRA_DESCENDANT_TX_SIZE_LIMIT,
};
if (ws.m_vsize > EXTRA_DESCENDANT_TX_SIZE_LIMIT ||
!m_pool.CalculateMemPoolAncestors(*entry, ws.m_ancestors, 2, m_limit_ancestor_size, m_limit_descendants + 1, m_limit_descendant_size + EXTRA_DESCENDANT_TX_SIZE_LIMIT, dummy_err_string)) {
!m_pool.CalculateMemPoolAncestors(*entry, ws.m_ancestors,
cpfp_carve_out_limits,
dummy_err_string)) {
return state.Invalid(TxValidationResult::TX_MEMPOOL_POLICY, "too-long-mempool-chain", errString);
}
}
@@ -976,8 +980,7 @@ bool MemPoolAccept::PackageMempoolChecks(const std::vector<CTransactionRef>& txn
{ return !m_pool.exists(GenTxid::Txid(tx->GetHash()));}));
std::string err_string;
if (!m_pool.CheckPackageLimits(txns, m_limit_ancestors, m_limit_ancestor_size, m_limit_descendants,
m_limit_descendant_size, err_string)) {
if (!m_pool.CheckPackageLimits(txns, m_limits, err_string)) {
// This is a package-wide error, separate from an individual transaction error.
return package_state.Invalid(PackageValidationResult::PCKG_POLICY, "package-mempool-limits", err_string);
}
@@ -1121,9 +1124,7 @@ bool MemPoolAccept::SubmitPackage(const ATMPArgs& args, std::vector<Workspace>&
// Re-calculate mempool ancestors to call addUnchecked(). They may have changed since the
// last calculation done in PreChecks, since package ancestors have already been submitted.
std::string unused_err_string;
if(!m_pool.CalculateMemPoolAncestors(*ws.m_entry, ws.m_ancestors, m_limit_ancestors,
m_limit_ancestor_size, m_limit_descendants,
m_limit_descendant_size, unused_err_string)) {
if(!m_pool.CalculateMemPoolAncestors(*ws.m_entry, ws.m_ancestors, m_limits, unused_err_string)) {
results.emplace(ws.m_ptx->GetWitnessHash(), MempoolAcceptResult::Failure(ws.m_state));
// Since PreChecks() and PackageMempoolChecks() both enforce limits, this should never fail.
Assume(false);