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[policy] disallow transactions under min relay fee, even in packages

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Avoid adding transactions below min relay feerate because, even if they
were bumped through CPFP when entering the mempool, we do not have a
DoS-resistant way of ensuring they always remain bumped.  In the future,
this rule can be relaxed (e.g. to allow packages to bump 0-fee
transactions) if we find a way to do so.
This commit is contained in:
glozow
2023-01-17 11:01:13 +00:00
parent c4554fe894
commit 563a2ee4f5
3 changed files with 49 additions and 19 deletions
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20
src/test/txpackage_tests.cpp
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@@ -671,10 +671,13 @@ BOOST_FIXTURE_TEST_CASE(package_cpfp_tests, TestChain100Setup)
BOOST_CHECK_EQUAL(m_node.mempool->size(), expected_pool_size);
const auto submit_cpfp_deprio = ProcessNewPackage(m_node.chainman->ActiveChainstate(), *m_node.mempool,
package_cpfp, /*test_accept=*/ false);
BOOST_CHECK_EQUAL(submit_cpfp_deprio.m_state.GetResult(), PackageValidationResult::PCKG_POLICY);
BOOST_CHECK_MESSAGE(submit_cpfp_deprio.m_state.IsInvalid(),
"Package validation unexpectedly succeeded: " << submit_cpfp_deprio.m_state.GetRejectReason());
BOOST_CHECK(submit_cpfp_deprio.m_tx_results.empty());
BOOST_CHECK_EQUAL(submit_cpfp_deprio.m_state.GetResult(), PackageValidationResult::PCKG_TX);
BOOST_CHECK(submit_cpfp_deprio.m_state.IsInvalid());
BOOST_CHECK_EQUAL(submit_cpfp_deprio.m_tx_results.find(tx_parent->GetWitnessHash())->second.m_state.GetResult(),
TxValidationResult::TX_MEMPOOL_POLICY);
BOOST_CHECK_EQUAL(submit_cpfp_deprio.m_tx_results.find(tx_child->GetWitnessHash())->second.m_state.GetResult(),
TxValidationResult::TX_MISSING_INPUTS);
BOOST_CHECK(submit_cpfp_deprio.m_tx_results.find(tx_parent->GetWitnessHash())->second.m_state.GetRejectReason() == "min relay fee not met");
BOOST_CHECK_EQUAL(m_node.mempool->size(), expected_pool_size);
const CFeeRate expected_feerate(0, GetVirtualTransactionSize(*tx_parent) + GetVirtualTransactionSize(*tx_child));
}
@@ -808,8 +811,8 @@ BOOST_FIXTURE_TEST_CASE(package_cpfp_tests, TestChain100Setup)
BOOST_CHECK_MESSAGE(submit_rich_parent.m_state.IsInvalid(), "Package validation unexpectedly succeeded");
// The child would have been validated on its own and failed, then submitted as a "package" of 1.
BOOST_CHECK_EQUAL(submit_rich_parent.m_state.GetResult(), PackageValidationResult::PCKG_POLICY);
BOOST_CHECK_EQUAL(submit_rich_parent.m_state.GetRejectReason(), "package-fee-too-low");
BOOST_CHECK_EQUAL(submit_rich_parent.m_state.GetResult(), PackageValidationResult::PCKG_TX);
BOOST_CHECK_EQUAL(submit_rich_parent.m_state.GetRejectReason(), "transaction failed");
auto it_parent = submit_rich_parent.m_tx_results.find(tx_parent_rich->GetWitnessHash());
BOOST_CHECK(it_parent != submit_rich_parent.m_tx_results.end());
@@ -818,6 +821,11 @@ BOOST_FIXTURE_TEST_CASE(package_cpfp_tests, TestChain100Setup)
BOOST_CHECK_MESSAGE(it_parent->second.m_base_fees.value() == high_parent_fee,
strprintf("rich parent: expected fee %s, got %s", high_parent_fee, it_parent->second.m_base_fees.value()));
BOOST_CHECK(it_parent->second.m_effective_feerate == CFeeRate(high_parent_fee, GetVirtualTransactionSize(*tx_parent_rich)));
auto it_child = submit_rich_parent.m_tx_results.find(tx_child_poor->GetWitnessHash());
BOOST_CHECK(it_child != submit_rich_parent.m_tx_results.end());
BOOST_CHECK_EQUAL(it_child->second.m_result_type, MempoolAcceptResult::ResultType::INVALID);
BOOST_CHECK_EQUAL(it_child->second.m_state.GetResult(), TxValidationResult::TX_MEMPOOL_POLICY);
BOOST_CHECK(it_child->second.m_state.GetRejectReason() == "min relay fee not met");
BOOST_CHECK_EQUAL(m_node.mempool->size(), expected_pool_size);
BOOST_CHECK(m_node.mempool->exists(GenTxid::Txid(tx_parent_rich->GetHash())));