highperfocused/bitcoin
1
0
Fork 0
mirror of https://github.com/bitcoin/bitcoin.git synced 2025-11-11 14:38:29 +01:00
Code Issues Packages Projects Releases Wiki Activity

Merge bitcoin/bitcoin#24080: policy: Remove unused locktime flags

Browse Source 
fa8d4d9128 scripted-diff: Clarify CheckFinalTxAtTip name (MarcoFalke)
fa4e30b0f3 policy: Remove unused locktime flags (MarcoFalke)

Pull request description:

  The locktime flags have many issues:
  * They are passed in by a default argument, which is fragile. It has already lead to bugs like the one fixed in commit e30b6ea194.
  * They are negative (signed), which doesn't make sense for flags (unsigned in general). According to the review comments when the code was added: "The max on the flags is a fairly weird operation." (https://github.com/bitcoin/bitcoin/pull/6566#issuecomment-150310861)
  * No call site relies on the default argument and they all pass in a single compile-time constant, rendering most of the code dead and untested.
  * The dead code calls `GetAdjustedTime` (network adjusted time), which has its own issues. See https://github.com/bitcoin/bitcoin/issues/4521

  Fix all issues by removing them

ACKs for top commit:
  ajtowns:
    ACK  fa8d4d9128
  theStack:
    Code-review ACK fa8d4d9128
  glozow:
    ACK fa8d4d9128, agree the default arg `flags` is a massive footgun and just setting max flags is weird. Adding `AtTip` to the names makes sense to me, since they're both testing for *next* block and only ever used for {,re}addition to mempool.

Tree-SHA512: 79f4a52f34909eb598d88bbae7afe8abe5f85f45c128483d16aa83dacd0e5579e561b725d01b1e9a931d1821012a51ad2bc6fb2867f8d09ee541f9d234d696f8
This commit is contained in:
MarcoFalke
2022-03-14 16:32:17 +01:00
parent 25d045a9ec fa8d4d9128
commit 28bdaa3f76
3 changed files with 38 additions and 54 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
src/test/miner_tests.cpp
View File

@@ -30,10 +30,10 @@ using node::CBlockTemplate;
namespace miner_tests {
struct MinerTestingSetup : public TestingSetup {
void TestPackageSelection(const CChainParams& chainparams, const CScript& scriptPubKey, const std::vector<CTransactionRef>& txFirst) EXCLUSIVE_LOCKS_REQUIRED(::cs_main, m_node.mempool->cs);
bool TestSequenceLocks(const CTransaction& tx, int flags) EXCLUSIVE_LOCKS_REQUIRED(::cs_main, m_node.mempool->cs)
bool TestSequenceLocks(const CTransaction& tx) EXCLUSIVE_LOCKS_REQUIRED(::cs_main, m_node.mempool->cs)
{
CCoinsViewMemPool view_mempool(&m_node.chainman->ActiveChainstate().CoinsTip(), *m_node.mempool);
return CheckSequenceLocks(m_node.chainman->ActiveChain().Tip(), view_mempool, tx, flags);
return CheckSequenceLocksAtTip(m_node.chainman->ActiveChain().Tip(), view_mempool, tx);
}
BlockAssembler AssemblerForTest(const CChainParams& params);
};
@@ -410,7 +410,7 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
// non-final txs in mempool
SetMockTime(m_node.chainman->ActiveChain().Tip()->GetMedianTimePast()+1);
int flags = LOCKTIME_VERIFY_SEQUENCE|LOCKTIME_MEDIAN_TIME_PAST;
const int flags{LOCKTIME_VERIFY_SEQUENCE | LOCKTIME_MEDIAN_TIME_PAST};
// height map
std::vector<int> prevheights;
@@ -429,8 +429,8 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
tx.nLockTime = 0;
hash = tx.GetHash();
m_node.mempool->addUnchecked(entry.Fee(HIGHFEE).Time(GetTime()).SpendsCoinbase(true).FromTx(tx));
BOOST_CHECK(CheckFinalTx(m_node.chainman->ActiveChain().Tip(), CTransaction(tx), flags)); // Locktime passes
BOOST_CHECK(!TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks fail
BOOST_CHECK(CheckFinalTxAtTip(m_node.chainman->ActiveChain().Tip(), CTransaction{tx})); // Locktime passes
BOOST_CHECK(!TestSequenceLocks(CTransaction{tx})); // Sequence locks fail
{
CBlockIndex* active_chain_tip = m_node.chainman->ActiveChain().Tip();
@@ -443,8 +443,8 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
prevheights[0] = baseheight + 2;
hash = tx.GetHash();
m_node.mempool->addUnchecked(entry.Time(GetTime()).FromTx(tx));
BOOST_CHECK(CheckFinalTx(m_node.chainman->ActiveChain().Tip(), CTransaction(tx), flags)); // Locktime passes
BOOST_CHECK(!TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks fail
BOOST_CHECK(CheckFinalTxAtTip(m_node.chainman->ActiveChain().Tip(), CTransaction{tx})); // Locktime passes
BOOST_CHECK(!TestSequenceLocks(CTransaction{tx})); // Sequence locks fail
for (int i = 0; i < CBlockIndex::nMedianTimeSpan; i++)
m_node.chainman->ActiveChain().Tip()->GetAncestor(m_node.chainman->ActiveChain().Tip()->nHeight - i)->nTime += 512; //Trick the MedianTimePast
@@ -464,8 +464,8 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
tx.nLockTime = m_node.chainman->ActiveChain().Tip()->nHeight + 1;
hash = tx.GetHash();
m_node.mempool->addUnchecked(entry.Time(GetTime()).FromTx(tx));
BOOST_CHECK(!CheckFinalTx(m_node.chainman->ActiveChain().Tip(), CTransaction(tx), flags)); // Locktime fails
BOOST_CHECK(TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks pass
BOOST_CHECK(!CheckFinalTxAtTip(m_node.chainman->ActiveChain().Tip(), CTransaction{tx})); // Locktime fails
BOOST_CHECK(TestSequenceLocks(CTransaction{tx})); // Sequence locks pass
BOOST_CHECK(IsFinalTx(CTransaction(tx), m_node.chainman->ActiveChain().Tip()->nHeight + 2, m_node.chainman->ActiveChain().Tip()->GetMedianTimePast())); // Locktime passes on 2nd block
// absolute time locked
@@ -475,8 +475,8 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
prevheights[0] = baseheight + 4;
hash = tx.GetHash();
m_node.mempool->addUnchecked(entry.Time(GetTime()).FromTx(tx));
BOOST_CHECK(!CheckFinalTx(m_node.chainman->ActiveChain().Tip(), CTransaction(tx), flags)); // Locktime fails
BOOST_CHECK(TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks pass
BOOST_CHECK(!CheckFinalTxAtTip(m_node.chainman->ActiveChain().Tip(), CTransaction{tx})); // Locktime fails
BOOST_CHECK(TestSequenceLocks(CTransaction{tx})); // Sequence locks pass
BOOST_CHECK(IsFinalTx(CTransaction(tx), m_node.chainman->ActiveChain().Tip()->nHeight + 2, m_node.chainman->ActiveChain().Tip()->GetMedianTimePast() + 1)); // Locktime passes 1 second later
// mempool-dependent transactions (not added)
@@ -484,14 +484,14 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
prevheights[0] = m_node.chainman->ActiveChain().Tip()->nHeight + 1;
tx.nLockTime = 0;
tx.vin[0].nSequence = 0;
BOOST_CHECK(CheckFinalTx(m_node.chainman->ActiveChain().Tip(), CTransaction(tx), flags)); // Locktime passes
BOOST_CHECK(TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks pass
BOOST_CHECK(CheckFinalTxAtTip(m_node.chainman->ActiveChain().Tip(), CTransaction{tx})); // Locktime passes
BOOST_CHECK(TestSequenceLocks(CTransaction{tx})); // Sequence locks pass
tx.vin[0].nSequence = 1;
BOOST_CHECK(!TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks fail
BOOST_CHECK(!TestSequenceLocks(CTransaction{tx})); // Sequence locks fail
tx.vin[0].nSequence = CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG;
BOOST_CHECK(TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks pass
BOOST_CHECK(TestSequenceLocks(CTransaction{tx})); // Sequence locks pass
tx.vin[0].nSequence = CTxIn::SEQUENCE_LOCKTIME_TYPE_FLAG | 1;
BOOST_CHECK(!TestSequenceLocks(CTransaction(tx), flags)); // Sequence locks fail
BOOST_CHECK(!TestSequenceLocks(CTransaction{tx})); // Sequence locks fail
BOOST_CHECK(pblocktemplate = AssemblerForTest(chainparams).CreateNewBlock(scriptPubKey));