LCOV - code coverage report
Current view: top level - src/test - txvalidation_tests.cpp (source / functions) Coverage Total Hit
Test: total_coverage.info Lines: 99.5 % 371 369
Test Date: 2025-01-19 05:08:01 Functions: 100.0 % 10 10
Branches: 48.9 % 2032 994

             Branch data     Line data    Source code
       1                 :             : // Copyright (c) 2017-2021 The Bitcoin Core developers
       2                 :             : // Distributed under the MIT software license, see the accompanying
       3                 :             : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
       4                 :             : 
       5                 :             : #include <consensus/validation.h>
       6                 :             : #include <key_io.h>
       7                 :             : #include <policy/packages.h>
       8                 :             : #include <policy/policy.h>
       9                 :             : #include <policy/ephemeral_policy.h>
      10                 :             : #include <policy/truc_policy.h>
      11                 :             : #include <primitives/transaction.h>
      12                 :             : #include <random.h>
      13                 :             : #include <script/script.h>
      14                 :             : #include <test/util/setup_common.h>
      15                 :             : #include <test/util/txmempool.h>
      16                 :             : #include <validation.h>
      17                 :             : 
      18                 :             : #include <boost/test/unit_test.hpp>
      19                 :             : 
      20                 :             : 
      21                 :             : BOOST_AUTO_TEST_SUITE(txvalidation_tests)
      22                 :             : 
      23                 :             : /**
      24                 :             :  * Ensure that the mempool won't accept coinbase transactions.
      25                 :             :  */
      26   [ +  -  +  -  :           7 : BOOST_FIXTURE_TEST_CASE(tx_mempool_reject_coinbase, TestChain100Setup)
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                      - ]
      27                 :             : {
      28   [ +  -  +  -  :           1 :     CScript scriptPubKey = CScript() << ToByteVector(coinbaseKey.GetPubKey()) << OP_CHECKSIG;
                   +  - ]
      29         [ +  - ]:           1 :     CMutableTransaction coinbaseTx;
      30                 :             : 
      31                 :           1 :     coinbaseTx.version = 1;
      32         [ +  - ]:           1 :     coinbaseTx.vin.resize(1);
      33         [ +  - ]:           1 :     coinbaseTx.vout.resize(1);
      34   [ +  -  +  - ]:           1 :     coinbaseTx.vin[0].scriptSig = CScript() << OP_11 << OP_EQUAL;
      35                 :           1 :     coinbaseTx.vout[0].nValue = 1 * CENT;
      36                 :           1 :     coinbaseTx.vout[0].scriptPubKey = scriptPubKey;
      37                 :             : 
      38   [ +  -  +  -  :           3 :     BOOST_CHECK(CTransaction(coinbaseTx).IsCoinBase());
             +  -  +  - ]
      39                 :             : 
      40         [ +  - ]:           1 :     LOCK(cs_main);
      41                 :             : 
      42         [ +  - ]:           1 :     unsigned int initialPoolSize = m_node.mempool->size();
      43   [ +  -  +  - ]:           2 :     const MempoolAcceptResult result = m_node.chainman->ProcessTransaction(MakeTransactionRef(coinbaseTx));
      44                 :             : 
      45   [ +  -  +  -  :           2 :     BOOST_CHECK(result.m_result_type == MempoolAcceptResult::ResultType::INVALID);
                   +  - ]
      46                 :             : 
      47                 :             :     // Check that the transaction hasn't been added to mempool.
      48   [ +  -  +  -  :           1 :     BOOST_CHECK_EQUAL(m_node.mempool->size(), initialPoolSize);
                   +  - ]
      49                 :             : 
      50                 :             :     // Check that the validation state reflects the unsuccessful attempt.
      51   [ +  -  +  -  :           2 :     BOOST_CHECK(result.m_state.IsInvalid());
                   +  - ]
      52   [ +  -  +  -  :           1 :     BOOST_CHECK_EQUAL(result.m_state.GetRejectReason(), "coinbase");
                   +  - ]
      53   [ +  -  +  - ]:           2 :     BOOST_CHECK(result.m_state.GetResult() == TxValidationResult::TX_CONSENSUS);
      54         [ +  - ]:           3 : }
      55                 :             : 
      56                 :             : // Generate a number of random, nonexistent outpoints.
      57                 :          10 : static inline std::vector<COutPoint> random_outpoints(size_t num_outpoints) {
      58                 :          10 :     std::vector<COutPoint> outpoints;
      59         [ +  + ]:         129 :     for (size_t i{0}; i < num_outpoints; ++i) {
      60         [ +  - ]:         119 :         outpoints.emplace_back(Txid::FromUint256(GetRandHash()), 0);
      61                 :             :     }
      62                 :          10 :     return outpoints;
      63                 :           0 : }
      64                 :             : 
      65                 :           1 : static inline std::vector<CPubKey> random_keys(size_t num_keys) {
      66                 :           1 :     std::vector<CPubKey> keys;
      67         [ +  - ]:           1 :     keys.reserve(num_keys);
      68         [ +  + ]:           3 :     for (size_t i{0}; i < num_keys; ++i) {
      69                 :           2 :         CKey key;
      70         [ +  - ]:           2 :         key.MakeNewKey(true);
      71   [ +  -  +  - ]:           2 :         keys.emplace_back(key.GetPubKey());
      72                 :           2 :     }
      73                 :           1 :     return keys;
      74                 :           0 : }
      75                 :             : 
      76                 :             : // Creates a placeholder tx (not valid) with 25 outputs. Specify the version and the inputs.
      77                 :          28 : static inline CTransactionRef make_tx(const std::vector<COutPoint>& inputs, int32_t version)
      78                 :             : {
      79                 :          28 :     CMutableTransaction mtx = CMutableTransaction{};
      80                 :          28 :     mtx.version = version;
      81         [ +  - ]:          28 :     mtx.vin.resize(inputs.size());
      82         [ +  - ]:          28 :     mtx.vout.resize(25);
      83         [ +  + ]:         168 :     for (size_t i{0}; i < inputs.size(); ++i) {
      84                 :         140 :         mtx.vin[i].prevout = inputs[i];
      85                 :             :     }
      86         [ +  + ]:         728 :     for (auto i{0}; i < 25; ++i) {
      87         [ +  - ]:         700 :         mtx.vout[i].scriptPubKey = CScript() << OP_TRUE;
      88                 :         700 :         mtx.vout[i].nValue = 10000;
      89                 :             :     }
      90         [ +  - ]:          56 :     return MakeTransactionRef(mtx);
      91                 :          28 : }
      92                 :             : 
      93                 :             : static constexpr auto NUM_EPHEMERAL_TX_OUTPUTS = 3;
      94                 :             : static constexpr auto EPHEMERAL_DUST_INDEX = NUM_EPHEMERAL_TX_OUTPUTS - 1;
      95                 :             : 
      96                 :             : // Same as make_tx but adds 2 normal outputs and 0-value dust to end of vout
      97                 :           4 : static inline CTransactionRef make_ephemeral_tx(const std::vector<COutPoint>& inputs, int32_t version)
      98                 :             : {
      99                 :           4 :     CMutableTransaction mtx = CMutableTransaction{};
     100                 :           4 :     mtx.version = version;
     101         [ +  - ]:           4 :     mtx.vin.resize(inputs.size());
     102         [ +  + ]:           9 :     for (size_t i{0}; i < inputs.size(); ++i) {
     103                 :           5 :         mtx.vin[i].prevout = inputs[i];
     104                 :             :     }
     105         [ +  - ]:           4 :     mtx.vout.resize(NUM_EPHEMERAL_TX_OUTPUTS);
     106         [ +  + ]:          16 :     for (auto i{0}; i < NUM_EPHEMERAL_TX_OUTPUTS; ++i) {
     107         [ +  - ]:          12 :         mtx.vout[i].scriptPubKey = CScript() << OP_TRUE;
     108         [ +  + ]:          20 :         mtx.vout[i].nValue = (i == EPHEMERAL_DUST_INDEX) ? 0 : 10000;
     109                 :             :     }
     110         [ +  - ]:           8 :     return MakeTransactionRef(mtx);
     111                 :           4 : }
     112                 :             : 
     113   [ +  -  +  -  :           7 : BOOST_FIXTURE_TEST_CASE(ephemeral_tests, RegTestingSetup)
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                      - ]
     114                 :             : {
     115                 :           1 :     CTxMemPool& pool = *Assert(m_node.mempool);
     116         [ +  - ]:           1 :     LOCK2(cs_main, pool.cs);
     117                 :           1 :     TestMemPoolEntryHelper entry;
     118         [ +  - ]:           1 :     CTxMemPool::setEntries empty_ancestors;
     119                 :             : 
     120         [ +  - ]:           1 :     TxValidationState child_state;
     121         [ +  - ]:           1 :     Txid child_txid;
     122                 :             : 
     123                 :             :     // Arbitrary non-0 feerate for these tests
     124         [ +  - ]:           1 :     CFeeRate dustrelay(DUST_RELAY_TX_FEE);
     125                 :             : 
     126                 :             :     // Basic transaction with dust
     127   [ +  -  +  - ]:           1 :     auto grandparent_tx_1 = make_ephemeral_tx(random_outpoints(1), /*version=*/2);
     128         [ +  - ]:           1 :     const auto dust_txid = grandparent_tx_1->GetHash();
     129                 :             : 
     130                 :             :     // Child transaction spending dust
     131   [ +  -  +  -  :           2 :     auto dust_spend = make_tx({COutPoint{dust_txid, EPHEMERAL_DUST_INDEX}}, /*version=*/2);
                   +  - ]
     132                 :             : 
     133                 :             :     // We first start with nothing "in the mempool", using package checks
     134                 :             : 
     135                 :             :     // Trivial single transaction with no dust
     136   [ +  -  +  -  :           4 :     BOOST_CHECK(CheckEphemeralSpends({dust_spend}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     137   [ +  -  +  -  :           2 :     BOOST_CHECK(child_state.IsValid());
                   +  - ]
     138   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, Txid());
     139                 :             : 
     140                 :             :     // Now with dust, ok because the tx has no dusty parents
     141   [ +  -  +  -  :           4 :     BOOST_CHECK(CheckEphemeralSpends({grandparent_tx_1}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     142   [ +  -  +  -  :           2 :     BOOST_CHECK(child_state.IsValid());
                   +  - ]
     143   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, Txid());
     144                 :             : 
     145                 :             :     // Dust checks pass
     146   [ +  -  +  -  :           5 :     BOOST_CHECK(CheckEphemeralSpends({grandparent_tx_1, dust_spend}, CFeeRate(0), pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     147   [ +  -  +  -  :           2 :     BOOST_CHECK(child_state.IsValid());
                   +  - ]
     148   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, Txid());
     149   [ +  -  +  -  :           5 :     BOOST_CHECK(CheckEphemeralSpends({grandparent_tx_1, dust_spend}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     150   [ +  -  +  -  :           2 :     BOOST_CHECK(child_state.IsValid());
                   +  - ]
     151   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, Txid());
     152                 :             : 
     153   [ +  -  +  -  :           2 :     auto dust_non_spend = make_tx({COutPoint{dust_txid, EPHEMERAL_DUST_INDEX - 1}}, /*version=*/2);
                   +  - ]
     154                 :             : 
     155                 :             :     // Child spending non-dust only from parent should be disallowed even if dust otherwise spent
     156         [ +  - ]:           1 :     const auto dust_non_spend_txid{dust_non_spend->GetHash()};
     157   [ +  -  +  -  :           6 :     BOOST_CHECK(!CheckEphemeralSpends({grandparent_tx_1, dust_non_spend, dust_spend}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     158   [ +  -  +  -  :           2 :     BOOST_CHECK(!child_state.IsValid());
                   +  - ]
     159   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, dust_non_spend_txid);
     160                 :           1 :     child_state = TxValidationState();
     161         [ +  - ]:           1 :     child_txid = Txid();
     162                 :             : 
     163   [ +  -  +  -  :           6 :     BOOST_CHECK(!CheckEphemeralSpends({grandparent_tx_1, dust_spend, dust_non_spend}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     164   [ +  -  +  -  :           2 :     BOOST_CHECK(!child_state.IsValid());
                   +  - ]
     165   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, dust_non_spend_txid);
     166                 :           1 :     child_state = TxValidationState();
     167         [ +  - ]:           1 :     child_txid = Txid();
     168                 :             : 
     169   [ +  -  +  -  :           5 :     BOOST_CHECK(!CheckEphemeralSpends({grandparent_tx_1, dust_non_spend}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     170   [ +  -  +  -  :           2 :     BOOST_CHECK(!child_state.IsValid());
                   +  - ]
     171   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, dust_non_spend_txid);
     172                 :           1 :     child_state = TxValidationState();
     173         [ +  - ]:           1 :     child_txid = Txid();
     174                 :             : 
     175   [ +  -  +  - ]:           1 :     auto grandparent_tx_2 = make_ephemeral_tx(random_outpoints(1), /*version=*/2);
     176         [ +  - ]:           1 :     const auto dust_txid_2 = grandparent_tx_2->GetHash();
     177                 :             : 
     178                 :             :     // Spend dust from one but not another is ok, as long as second grandparent has no child
     179   [ +  -  +  -  :           6 :     BOOST_CHECK(CheckEphemeralSpends({grandparent_tx_1, grandparent_tx_2, dust_spend}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     180   [ +  -  +  -  :           2 :     BOOST_CHECK(child_state.IsValid());
                   +  - ]
     181   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, Txid());
     182                 :             : 
     183   [ +  -  +  -  :           2 :     auto dust_non_spend_both_parents = make_tx({COutPoint{dust_txid, EPHEMERAL_DUST_INDEX}, COutPoint{dust_txid_2, EPHEMERAL_DUST_INDEX - 1}}, /*version=*/2);
                   +  - ]
     184                 :             :     // But if we spend from the parent, it must spend dust
     185   [ +  -  +  -  :           6 :     BOOST_CHECK(!CheckEphemeralSpends({grandparent_tx_1, grandparent_tx_2, dust_non_spend_both_parents}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     186   [ +  -  +  -  :           2 :     BOOST_CHECK(!child_state.IsValid());
                   +  - ]
     187   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, dust_non_spend_both_parents->GetHash());
     188                 :           1 :     child_state = TxValidationState();
     189         [ +  - ]:           1 :     child_txid = Txid();
     190                 :             : 
     191   [ +  -  +  -  :           2 :     auto dust_spend_both_parents = make_tx({COutPoint{dust_txid, EPHEMERAL_DUST_INDEX}, COutPoint{dust_txid_2, EPHEMERAL_DUST_INDEX}}, /*version=*/2);
                   +  - ]
     192   [ +  -  +  -  :           6 :     BOOST_CHECK(CheckEphemeralSpends({grandparent_tx_1, grandparent_tx_2, dust_spend_both_parents}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     193   [ +  -  +  -  :           2 :     BOOST_CHECK(child_state.IsValid());
                   +  - ]
     194   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, Txid());
     195                 :             : 
     196                 :             :     // Spending other outputs is also correct, as long as the dusty one is spent
     197         [ +  - ]:           1 :     const std::vector<COutPoint> all_outpoints{COutPoint(dust_txid, 0), COutPoint(dust_txid, 1), COutPoint(dust_txid, 2),
     198         [ +  - ]:           1 :         COutPoint(dust_txid_2, 0), COutPoint(dust_txid_2, 1), COutPoint(dust_txid_2, 2)};
     199         [ +  - ]:           1 :     auto dust_spend_all_outpoints = make_tx(all_outpoints, /*version=*/2);
     200   [ +  -  +  -  :           6 :     BOOST_CHECK(CheckEphemeralSpends({grandparent_tx_1, grandparent_tx_2, dust_spend_all_outpoints}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     201   [ +  -  +  -  :           2 :     BOOST_CHECK(child_state.IsValid());
                   +  - ]
     202   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, Txid());
     203                 :             : 
     204                 :             :     // 2 grandparents with dust <- 1 dust-spending parent with dust <- child with no dust
     205   [ +  -  +  -  :           2 :     auto parent_with_dust = make_ephemeral_tx({COutPoint{dust_txid, EPHEMERAL_DUST_INDEX}, COutPoint{dust_txid_2, EPHEMERAL_DUST_INDEX}}, /*version=*/2);
                   +  - ]
     206                 :             :     // Ok for parent to have dust
     207   [ +  -  +  -  :           6 :     BOOST_CHECK(CheckEphemeralSpends({grandparent_tx_1, grandparent_tx_2, parent_with_dust}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     208   [ +  -  +  -  :           2 :     BOOST_CHECK(child_state.IsValid());
                   +  - ]
     209   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, Txid());
     210   [ +  -  +  -  :           2 :     auto child_no_dust = make_tx({COutPoint{parent_with_dust->GetHash(), EPHEMERAL_DUST_INDEX}}, /*version=*/2);
                   +  - ]
     211   [ +  -  +  -  :           7 :     BOOST_CHECK(CheckEphemeralSpends({grandparent_tx_1, grandparent_tx_2, parent_with_dust, child_no_dust}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     212   [ +  -  +  -  :           2 :     BOOST_CHECK(child_state.IsValid());
                   +  - ]
     213   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, Txid());
     214                 :             : 
     215                 :             :     // 2 grandparents with dust <- 1 dust-spending parent with dust <- child with dust
     216   [ +  -  +  -  :           2 :     auto child_with_dust = make_ephemeral_tx({COutPoint{parent_with_dust->GetHash(), EPHEMERAL_DUST_INDEX}}, /*version=*/2);
                   +  - ]
     217   [ +  -  +  -  :           7 :     BOOST_CHECK(CheckEphemeralSpends({grandparent_tx_1, grandparent_tx_2, parent_with_dust, child_with_dust}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     218   [ +  -  +  -  :           2 :     BOOST_CHECK(child_state.IsValid());
                   +  - ]
     219   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, Txid());
     220                 :             : 
     221                 :             :     // Tests with parents in mempool
     222                 :             : 
     223                 :             :     // Nothing in mempool, this should pass for any transaction
     224   [ +  -  +  -  :           4 :     BOOST_CHECK(CheckEphemeralSpends({grandparent_tx_1}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     225   [ +  -  +  -  :           2 :     BOOST_CHECK(child_state.IsValid());
                   +  - ]
     226   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, Txid());
     227                 :             : 
     228                 :             :     // Add first grandparent to mempool and fetch entry
     229   [ +  -  +  - ]:           1 :     AddToMempool(pool, entry.FromTx(grandparent_tx_1));
     230                 :             : 
     231                 :             :     // Ignores ancestors that aren't direct parents
     232   [ +  -  +  -  :           4 :     BOOST_CHECK(CheckEphemeralSpends({child_no_dust}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     233   [ +  -  +  -  :           2 :     BOOST_CHECK(child_state.IsValid());
                   +  - ]
     234   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, Txid());
     235                 :             : 
     236                 :             :     // Valid spend of dust with grandparent in mempool
     237   [ +  -  +  -  :           4 :     BOOST_CHECK(CheckEphemeralSpends({parent_with_dust}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     238   [ +  -  +  -  :           2 :     BOOST_CHECK(child_state.IsValid());
                   +  - ]
     239   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, Txid());
     240                 :             : 
     241                 :             :     // Second grandparent in same package
     242   [ +  -  +  -  :           5 :     BOOST_CHECK(CheckEphemeralSpends({parent_with_dust, grandparent_tx_2}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     243   [ +  -  +  -  :           2 :     BOOST_CHECK(child_state.IsValid());
                   +  - ]
     244   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, Txid());
     245                 :             : 
     246                 :             :     // Order in package doesn't matter
     247   [ +  -  +  -  :           5 :     BOOST_CHECK(CheckEphemeralSpends({grandparent_tx_2, parent_with_dust}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     248   [ +  -  +  -  :           2 :     BOOST_CHECK(child_state.IsValid());
                   +  - ]
     249   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, Txid());
     250                 :             : 
     251                 :             :     // Add second grandparent to mempool
     252   [ +  -  +  - ]:           1 :     AddToMempool(pool, entry.FromTx(grandparent_tx_2));
     253                 :             : 
     254                 :             :     // Only spends single dust out of two direct parents
     255   [ +  -  +  -  :           4 :     BOOST_CHECK(!CheckEphemeralSpends({dust_non_spend_both_parents}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     256   [ +  -  +  -  :           2 :     BOOST_CHECK(!child_state.IsValid());
                   +  - ]
     257   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, dust_non_spend_both_parents->GetHash());
     258                 :           1 :     child_state = TxValidationState();
     259         [ +  - ]:           1 :     child_txid = Txid();
     260                 :             : 
     261                 :             :     // Spends both parents' dust
     262   [ +  -  +  -  :           4 :     BOOST_CHECK(CheckEphemeralSpends({parent_with_dust}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     263   [ +  -  +  -  :           2 :     BOOST_CHECK(child_state.IsValid());
                   +  - ]
     264   [ +  -  +  - ]:           1 :     BOOST_CHECK_EQUAL(child_txid, Txid());
     265                 :             : 
     266                 :             :     // Now add dusty parent to mempool
     267   [ +  -  +  - ]:           1 :     AddToMempool(pool, entry.FromTx(parent_with_dust));
     268                 :             : 
     269                 :             :     // Passes dust checks even with non-parent ancestors
     270   [ +  -  +  -  :           4 :     BOOST_CHECK(CheckEphemeralSpends({child_no_dust}, dustrelay, pool, child_state, child_txid));
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     271   [ +  -  +  -  :           2 :     BOOST_CHECK(child_state.IsValid());
                   +  - ]
     272   [ +  -  +  -  :           1 :     BOOST_CHECK_EQUAL(child_txid, Txid());
                   +  - ]
     273   [ +  -  +  -  :          82 : }
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     274                 :             : 
     275   [ +  -  +  -  :           7 : BOOST_FIXTURE_TEST_CASE(version3_tests, RegTestingSetup)
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     276                 :             : {
     277                 :             :     // Test TRUC policy helper functions
     278                 :           1 :     CTxMemPool& pool = *Assert(m_node.mempool);
     279         [ +  - ]:           1 :     LOCK2(cs_main, pool.cs);
     280                 :           1 :     TestMemPoolEntryHelper entry;
     281         [ +  - ]:           1 :     std::set<Txid> empty_conflicts_set;
     282                 :           1 :     CTxMemPool::setEntries empty_ancestors;
     283                 :             : 
     284   [ +  -  +  - ]:           1 :     auto mempool_tx_v3 = make_tx(random_outpoints(1), /*version=*/3);
     285   [ +  -  +  - ]:           1 :     AddToMempool(pool, entry.FromTx(mempool_tx_v3));
     286   [ +  -  +  - ]:           1 :     auto mempool_tx_v2 = make_tx(random_outpoints(1), /*version=*/2);
     287   [ +  -  +  - ]:           1 :     AddToMempool(pool, entry.FromTx(mempool_tx_v2));
     288                 :             :     // Default values.
     289                 :           1 :     CTxMemPool::Limits m_limits{};
     290                 :             : 
     291                 :             :     // Cannot spend from an unconfirmed TRUC transaction unless this tx is also TRUC.
     292                 :           1 :     {
     293                 :             :         // mempool_tx_v3
     294                 :             :         //      ^
     295                 :             :         // tx_v2_from_v3
     296   [ +  -  +  -  :           2 :         auto tx_v2_from_v3 = make_tx({COutPoint{mempool_tx_v3->GetHash(), 0}}, /*version=*/2);
                   +  - ]
     297   [ +  -  +  - ]:           1 :         auto ancestors_v2_from_v3{pool.CalculateMemPoolAncestors(entry.FromTx(tx_v2_from_v3), m_limits)};
     298         [ +  - ]:           1 :         const auto expected_error_str{strprintf("non-version=3 tx %s (wtxid=%s) cannot spend from version=3 tx %s (wtxid=%s)",
     299   [ +  -  +  - ]:           2 :             tx_v2_from_v3->GetHash().ToString(), tx_v2_from_v3->GetWitnessHash().ToString(),
     300   [ +  -  +  -  :           3 :             mempool_tx_v3->GetHash().ToString(), mempool_tx_v3->GetWitnessHash().ToString())};
             +  -  +  - ]
     301   [ +  -  +  - ]:           1 :         auto result_v2_from_v3{SingleTRUCChecks(tx_v2_from_v3, *ancestors_v2_from_v3, empty_conflicts_set, GetVirtualTransactionSize(*tx_v2_from_v3))};
     302   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result_v2_from_v3->first, expected_error_str);
     303   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result_v2_from_v3->second, nullptr);
     304                 :             : 
     305   [ +  +  +  -  :           3 :         Package package_v3_v2{mempool_tx_v3, tx_v2_from_v3};
             -  -  -  - ]
     306   [ +  -  +  -  :           1 :         BOOST_CHECK_EQUAL(*PackageTRUCChecks(tx_v2_from_v3, GetVirtualTransactionSize(*tx_v2_from_v3), package_v3_v2, empty_ancestors), expected_error_str);
             +  -  +  - ]
     307   [ +  -  +  - ]:           2 :         CTxMemPool::setEntries entries_mempool_v3{pool.GetIter(mempool_tx_v3->GetHash().ToUint256()).value()};
     308   [ +  -  +  -  :           3 :         BOOST_CHECK_EQUAL(*PackageTRUCChecks(tx_v2_from_v3, GetVirtualTransactionSize(*tx_v2_from_v3), {tx_v2_from_v3}, entries_mempool_v3), expected_error_str);
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     309                 :             : 
     310                 :             :         // mempool_tx_v3  mempool_tx_v2
     311                 :             :         //            ^    ^
     312                 :             :         //    tx_v2_from_v2_and_v3
     313   [ +  -  +  -  :           2 :         auto tx_v2_from_v2_and_v3 = make_tx({COutPoint{mempool_tx_v3->GetHash(), 0}, COutPoint{mempool_tx_v2->GetHash(), 0}}, /*version=*/2);
                   +  - ]
     314   [ +  -  +  - ]:           1 :         auto ancestors_v2_from_both{pool.CalculateMemPoolAncestors(entry.FromTx(tx_v2_from_v2_and_v3), m_limits)};
     315         [ +  - ]:           1 :         const auto expected_error_str_2{strprintf("non-version=3 tx %s (wtxid=%s) cannot spend from version=3 tx %s (wtxid=%s)",
     316   [ +  -  +  - ]:           2 :             tx_v2_from_v2_and_v3->GetHash().ToString(), tx_v2_from_v2_and_v3->GetWitnessHash().ToString(),
     317   [ +  -  +  -  :           3 :             mempool_tx_v3->GetHash().ToString(), mempool_tx_v3->GetWitnessHash().ToString())};
             +  -  +  - ]
     318   [ +  -  +  - ]:           1 :         auto result_v2_from_both{SingleTRUCChecks(tx_v2_from_v2_and_v3, *ancestors_v2_from_both, empty_conflicts_set, GetVirtualTransactionSize(*tx_v2_from_v2_and_v3))};
     319   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result_v2_from_both->first, expected_error_str_2);
     320   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result_v2_from_both->second, nullptr);
     321                 :             : 
     322   [ +  +  +  -  :           4 :         Package package_v3_v2_v2{mempool_tx_v3, mempool_tx_v2, tx_v2_from_v2_and_v3};
             -  -  -  - ]
     323   [ +  -  +  -  :           1 :         BOOST_CHECK_EQUAL(*PackageTRUCChecks(tx_v2_from_v2_and_v3, GetVirtualTransactionSize(*tx_v2_from_v2_and_v3), package_v3_v2_v2, empty_ancestors), expected_error_str_2);
             +  -  +  - ]
     324   [ +  -  +  - ]:           2 :     }
     325                 :             : 
     326                 :             :     // TRUC cannot spend from an unconfirmed non-TRUC transaction.
     327                 :           1 :     {
     328                 :             :         // mempool_tx_v2
     329                 :             :         //      ^
     330                 :             :         // tx_v3_from_v2
     331   [ +  -  +  -  :           2 :         auto tx_v3_from_v2 = make_tx({COutPoint{mempool_tx_v2->GetHash(), 0}}, /*version=*/3);
                   +  - ]
     332   [ +  -  +  - ]:           1 :         auto ancestors_v3_from_v2{pool.CalculateMemPoolAncestors(entry.FromTx(tx_v3_from_v2), m_limits)};
     333         [ +  - ]:           1 :         const auto expected_error_str{strprintf("version=3 tx %s (wtxid=%s) cannot spend from non-version=3 tx %s (wtxid=%s)",
     334   [ +  -  +  - ]:           2 :             tx_v3_from_v2->GetHash().ToString(), tx_v3_from_v2->GetWitnessHash().ToString(),
     335   [ +  -  +  -  :           3 :             mempool_tx_v2->GetHash().ToString(), mempool_tx_v2->GetWitnessHash().ToString())};
             +  -  +  - ]
     336   [ +  -  +  - ]:           1 :         auto result_v3_from_v2{SingleTRUCChecks(tx_v3_from_v2, *ancestors_v3_from_v2,  empty_conflicts_set, GetVirtualTransactionSize(*tx_v3_from_v2))};
     337   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result_v3_from_v2->first, expected_error_str);
     338   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result_v3_from_v2->second, nullptr);
     339                 :             : 
     340   [ +  +  +  -  :           3 :         Package package_v2_v3{mempool_tx_v2, tx_v3_from_v2};
             -  -  -  - ]
     341   [ +  -  +  -  :           1 :         BOOST_CHECK_EQUAL(*PackageTRUCChecks(tx_v3_from_v2, GetVirtualTransactionSize(*tx_v3_from_v2), package_v2_v3, empty_ancestors), expected_error_str);
             +  -  +  - ]
     342   [ +  -  +  - ]:           2 :         CTxMemPool::setEntries entries_mempool_v2{pool.GetIter(mempool_tx_v2->GetHash().ToUint256()).value()};
     343   [ +  -  +  -  :           3 :         BOOST_CHECK_EQUAL(*PackageTRUCChecks(tx_v3_from_v2, GetVirtualTransactionSize(*tx_v3_from_v2), {tx_v3_from_v2}, entries_mempool_v2), expected_error_str);
          +  -  +  -  +  
          +  +  -  -  -  
                   -  - ]
     344                 :             : 
     345                 :             :         // mempool_tx_v3  mempool_tx_v2
     346                 :             :         //            ^    ^
     347                 :             :         //    tx_v3_from_v2_and_v3
     348   [ +  -  +  -  :           2 :         auto tx_v3_from_v2_and_v3 = make_tx({COutPoint{mempool_tx_v3->GetHash(), 0}, COutPoint{mempool_tx_v2->GetHash(), 0}}, /*version=*/3);
                   +  - ]
     349   [ +  -  +  - ]:           1 :         auto ancestors_v3_from_both{pool.CalculateMemPoolAncestors(entry.FromTx(tx_v3_from_v2_and_v3), m_limits)};
     350         [ +  - ]:           1 :         const auto expected_error_str_2{strprintf("version=3 tx %s (wtxid=%s) cannot spend from non-version=3 tx %s (wtxid=%s)",
     351   [ +  -  +  - ]:           2 :             tx_v3_from_v2_and_v3->GetHash().ToString(), tx_v3_from_v2_and_v3->GetWitnessHash().ToString(),
     352   [ +  -  +  -  :           3 :             mempool_tx_v2->GetHash().ToString(), mempool_tx_v2->GetWitnessHash().ToString())};
             +  -  +  - ]
     353   [ +  -  +  - ]:           1 :         auto result_v3_from_both{SingleTRUCChecks(tx_v3_from_v2_and_v3, *ancestors_v3_from_both, empty_conflicts_set, GetVirtualTransactionSize(*tx_v3_from_v2_and_v3))};
     354   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result_v3_from_both->first, expected_error_str_2);
     355   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result_v3_from_both->second, nullptr);
     356                 :             : 
     357                 :             :         // tx_v3_from_v2_and_v3 also violates TRUC_ANCESTOR_LIMIT.
     358         [ +  - ]:           1 :         const auto expected_error_str_3{strprintf("tx %s (wtxid=%s) would have too many ancestors",
     359   [ +  -  +  -  :           2 :             tx_v3_from_v2_and_v3->GetHash().ToString(), tx_v3_from_v2_and_v3->GetWitnessHash().ToString())};
                   +  - ]
     360   [ +  +  +  -  :           4 :         Package package_v3_v2_v3{mempool_tx_v3, mempool_tx_v2, tx_v3_from_v2_and_v3};
             -  -  -  - ]
     361   [ +  -  +  -  :           1 :         BOOST_CHECK_EQUAL(*PackageTRUCChecks(tx_v3_from_v2_and_v3, GetVirtualTransactionSize(*tx_v3_from_v2_and_v3), package_v3_v2_v3, empty_ancestors), expected_error_str_3);
             +  -  +  - ]
     362   [ +  -  +  - ]:           2 :     }
     363                 :             :     // V3 from V3 is ok, and non-V3 from non-V3 is ok.
     364                 :           1 :     {
     365                 :             :         // mempool_tx_v3
     366                 :             :         //      ^
     367                 :             :         // tx_v3_from_v3
     368   [ +  -  +  -  :           2 :         auto tx_v3_from_v3 = make_tx({COutPoint{mempool_tx_v3->GetHash(), 0}}, /*version=*/3);
                   +  - ]
     369   [ +  -  +  - ]:           1 :         auto ancestors_v3{pool.CalculateMemPoolAncestors(entry.FromTx(tx_v3_from_v3), m_limits)};
     370   [ +  -  +  -  :           2 :         BOOST_CHECK(SingleTRUCChecks(tx_v3_from_v3, *ancestors_v3, empty_conflicts_set, GetVirtualTransactionSize(*tx_v3_from_v3))
          +  -  +  -  +  
                      - ]
     371                 :             :                     == std::nullopt);
     372                 :             : 
     373   [ +  +  +  -  :           3 :         Package package_v3_v3{mempool_tx_v3, tx_v3_from_v3};
             -  -  -  - ]
     374   [ +  -  +  -  :           2 :         BOOST_CHECK(PackageTRUCChecks(tx_v3_from_v3, GetVirtualTransactionSize(*tx_v3_from_v3), package_v3_v3, empty_ancestors) == std::nullopt);
          +  -  +  -  +  
                      - ]
     375                 :             : 
     376                 :             :         // mempool_tx_v2
     377                 :             :         //      ^
     378                 :             :         // tx_v2_from_v2
     379   [ +  -  +  -  :           2 :         auto tx_v2_from_v2 = make_tx({COutPoint{mempool_tx_v2->GetHash(), 0}}, /*version=*/2);
                   +  - ]
     380   [ +  -  +  - ]:           1 :         auto ancestors_v2{pool.CalculateMemPoolAncestors(entry.FromTx(tx_v2_from_v2), m_limits)};
     381   [ +  -  +  -  :           2 :         BOOST_CHECK(SingleTRUCChecks(tx_v2_from_v2, *ancestors_v2, empty_conflicts_set, GetVirtualTransactionSize(*tx_v2_from_v2))
          +  -  +  -  +  
                      - ]
     382                 :             :                     == std::nullopt);
     383                 :             : 
     384   [ +  +  +  -  :           3 :         Package package_v2_v2{mempool_tx_v2, tx_v2_from_v2};
             -  -  -  - ]
     385   [ +  -  +  -  :           2 :         BOOST_CHECK(PackageTRUCChecks(tx_v2_from_v2, GetVirtualTransactionSize(*tx_v2_from_v2), package_v2_v2, empty_ancestors) == std::nullopt);
             +  -  +  - ]
     386   [ +  -  +  - ]:           2 :     }
     387                 :             : 
     388                 :             :     // Tx spending TRUC cannot have too many mempool ancestors
     389                 :             :     // Configuration where the tx has multiple direct parents.
     390                 :           1 :     {
     391                 :           1 :         Package package_multi_parents;
     392                 :           1 :         std::vector<COutPoint> mempool_outpoints;
     393         [ +  - ]:           1 :         mempool_outpoints.emplace_back(mempool_tx_v3->GetHash(), 0);
     394         [ +  - ]:           1 :         package_multi_parents.emplace_back(mempool_tx_v3);
     395         [ +  + ]:           3 :         for (size_t i{0}; i < 2; ++i) {
     396   [ +  -  +  - ]:           2 :             auto mempool_tx = make_tx(random_outpoints(i + 1), /*version=*/3);
     397   [ +  -  +  - ]:           2 :             AddToMempool(pool, entry.FromTx(mempool_tx));
     398         [ +  - ]:           2 :             mempool_outpoints.emplace_back(mempool_tx->GetHash(), 0);
     399         [ +  - ]:           2 :             package_multi_parents.emplace_back(mempool_tx);
     400                 :           2 :         }
     401         [ +  - ]:           1 :         auto tx_v3_multi_parent = make_tx(mempool_outpoints, /*version=*/3);
     402         [ +  - ]:           1 :         package_multi_parents.emplace_back(tx_v3_multi_parent);
     403   [ +  -  +  - ]:           1 :         auto ancestors{pool.CalculateMemPoolAncestors(entry.FromTx(tx_v3_multi_parent), m_limits)};
     404   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(ancestors->size(), 3);
     405         [ +  - ]:           1 :         const auto expected_error_str{strprintf("tx %s (wtxid=%s) would have too many ancestors",
     406   [ +  -  +  -  :           2 :             tx_v3_multi_parent->GetHash().ToString(), tx_v3_multi_parent->GetWitnessHash().ToString())};
                   +  - ]
     407   [ +  -  +  - ]:           1 :         auto result{SingleTRUCChecks(tx_v3_multi_parent, *ancestors, empty_conflicts_set, GetVirtualTransactionSize(*tx_v3_multi_parent))};
     408   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result->first, expected_error_str);
     409   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result->second, nullptr);
     410                 :             : 
     411   [ +  -  +  -  :           1 :         BOOST_CHECK_EQUAL(*PackageTRUCChecks(tx_v3_multi_parent, GetVirtualTransactionSize(*tx_v3_multi_parent), package_multi_parents, empty_ancestors),
             +  -  +  - ]
     412                 :             :                           expected_error_str);
     413         [ +  - ]:           2 :     }
     414                 :             : 
     415                 :             :     // Configuration where the tx is in a multi-generation chain.
     416                 :           1 :     {
     417                 :           1 :         Package package_multi_gen;
     418                 :           1 :         CTransactionRef middle_tx;
     419         [ +  - ]:           1 :         auto last_outpoint{random_outpoints(1)[0]};
     420         [ +  + ]:           3 :         for (size_t i{0}; i < 2; ++i) {
     421   [ +  -  +  -  :           4 :             auto mempool_tx = make_tx({last_outpoint}, /*version=*/3);
                   +  - ]
     422   [ +  -  +  - ]:           2 :             AddToMempool(pool, entry.FromTx(mempool_tx));
     423         [ +  - ]:           2 :             last_outpoint = COutPoint{mempool_tx->GetHash(), 0};
     424         [ +  - ]:           2 :             package_multi_gen.emplace_back(mempool_tx);
     425         [ +  + ]:           2 :             if (i == 1) middle_tx = mempool_tx;
     426                 :           2 :         }
     427   [ +  -  +  -  :           2 :         auto tx_v3_multi_gen = make_tx({last_outpoint}, /*version=*/3);
                   +  - ]
     428         [ +  - ]:           1 :         package_multi_gen.emplace_back(tx_v3_multi_gen);
     429   [ +  -  +  - ]:           1 :         auto ancestors{pool.CalculateMemPoolAncestors(entry.FromTx(tx_v3_multi_gen), m_limits)};
     430         [ +  - ]:           1 :         const auto expected_error_str{strprintf("tx %s (wtxid=%s) would have too many ancestors",
     431   [ +  -  +  -  :           2 :             tx_v3_multi_gen->GetHash().ToString(), tx_v3_multi_gen->GetWitnessHash().ToString())};
                   +  - ]
     432   [ +  -  +  - ]:           1 :         auto result{SingleTRUCChecks(tx_v3_multi_gen, *ancestors, empty_conflicts_set, GetVirtualTransactionSize(*tx_v3_multi_gen))};
     433   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result->first, expected_error_str);
     434   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result->second, nullptr);
     435                 :             : 
     436                 :             :         // Middle tx is what triggers a failure for the grandchild:
     437   [ +  -  +  -  :           1 :         BOOST_CHECK_EQUAL(*PackageTRUCChecks(middle_tx, GetVirtualTransactionSize(*middle_tx), package_multi_gen, empty_ancestors), expected_error_str);
             +  -  +  - ]
     438   [ +  -  +  -  :           2 :         BOOST_CHECK(PackageTRUCChecks(tx_v3_multi_gen, GetVirtualTransactionSize(*tx_v3_multi_gen), package_multi_gen, empty_ancestors) == std::nullopt);
             +  -  +  - ]
     439   [ +  -  +  - ]:           3 :     }
     440                 :             : 
     441                 :             :     // Tx spending TRUC cannot be too large in virtual size.
     442         [ +  - ]:           1 :     auto many_inputs{random_outpoints(100)};
     443         [ +  - ]:           1 :     many_inputs.emplace_back(mempool_tx_v3->GetHash(), 0);
     444                 :           1 :     {
     445         [ +  - ]:           1 :         auto tx_v3_child_big = make_tx(many_inputs, /*version=*/3);
     446         [ +  - ]:           1 :         const auto vsize{GetVirtualTransactionSize(*tx_v3_child_big)};
     447   [ +  -  +  - ]:           1 :         auto ancestors{pool.CalculateMemPoolAncestors(entry.FromTx(tx_v3_child_big), m_limits)};
     448         [ +  - ]:           1 :         const auto expected_error_str{strprintf("version=3 child tx %s (wtxid=%s) is too big: %u > %u virtual bytes",
     449   [ +  -  +  -  :           2 :             tx_v3_child_big->GetHash().ToString(), tx_v3_child_big->GetWitnessHash().ToString(), vsize, TRUC_CHILD_MAX_VSIZE)};
                   +  - ]
     450   [ +  -  +  - ]:           1 :         auto result{SingleTRUCChecks(tx_v3_child_big, *ancestors, empty_conflicts_set, GetVirtualTransactionSize(*tx_v3_child_big))};
     451   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result->first, expected_error_str);
     452   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result->second, nullptr);
     453                 :             : 
     454   [ +  +  +  -  :           3 :         Package package_child_big{mempool_tx_v3, tx_v3_child_big};
             -  -  -  - ]
     455   [ +  -  +  -  :           1 :         BOOST_CHECK_EQUAL(*PackageTRUCChecks(tx_v3_child_big, GetVirtualTransactionSize(*tx_v3_child_big), package_child_big, empty_ancestors),
             +  -  +  - ]
     456                 :             :                           expected_error_str);
     457         [ +  - ]:           1 :     }
     458                 :             : 
     459                 :             :     // Tx spending TRUC cannot have too many sigops.
     460                 :             :     // This child has 10 P2WSH multisig inputs.
     461         [ +  - ]:           1 :     auto multisig_outpoints{random_outpoints(10)};
     462         [ +  - ]:           1 :     multisig_outpoints.emplace_back(mempool_tx_v3->GetHash(), 0);
     463         [ +  - ]:           1 :     auto keys{random_keys(2)};
     464                 :           1 :     CScript script_multisig;
     465         [ +  - ]:           1 :     script_multisig << OP_1;
     466         [ +  + ]:           3 :     for (const auto& key : keys) {
     467         [ +  - ]:           2 :         script_multisig << ToByteVector(key);
     468                 :             :     }
     469   [ +  -  +  - ]:           1 :     script_multisig << OP_2 << OP_CHECKMULTISIG;
     470                 :           1 :     {
     471         [ +  - ]:           1 :         CMutableTransaction mtx_many_sigops = CMutableTransaction{};
     472                 :           1 :         mtx_many_sigops.version = TRUC_VERSION;
     473         [ +  + ]:          12 :         for (const auto& outpoint : multisig_outpoints) {
     474         [ +  - ]:          11 :             mtx_many_sigops.vin.emplace_back(outpoint);
     475   [ +  -  +  - ]:          22 :             mtx_many_sigops.vin.back().scriptWitness.stack.emplace_back(script_multisig.begin(), script_multisig.end());
     476                 :             :         }
     477         [ +  - ]:           1 :         mtx_many_sigops.vout.resize(1);
     478         [ +  - ]:           1 :         mtx_many_sigops.vout.back().scriptPubKey = CScript() << OP_TRUE;
     479                 :           1 :         mtx_many_sigops.vout.back().nValue = 10000;
     480         [ +  - ]:           1 :         auto tx_many_sigops{MakeTransactionRef(mtx_many_sigops)};
     481                 :             : 
     482   [ +  -  +  - ]:           1 :         auto ancestors{pool.CalculateMemPoolAncestors(entry.FromTx(tx_many_sigops), m_limits)};
     483                 :             :         // legacy uses fAccurate = false, and the maximum number of multisig keys is used
     484         [ +  - ]:           1 :         const int64_t total_sigops{static_cast<int64_t>(tx_many_sigops->vin.size()) * static_cast<int64_t>(script_multisig.GetSigOpCount(/*fAccurate=*/false))};
     485   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(total_sigops, tx_many_sigops->vin.size() * MAX_PUBKEYS_PER_MULTISIG);
     486         [ +  - ]:           1 :         const int64_t bip141_vsize{GetVirtualTransactionSize(*tx_many_sigops)};
     487                 :             :         // Weight limit is not reached...
     488   [ +  -  +  -  :           2 :         BOOST_CHECK(SingleTRUCChecks(tx_many_sigops, *ancestors, empty_conflicts_set, bip141_vsize) == std::nullopt);
             +  -  +  - ]
     489                 :             :         // ...but sigop limit is.
     490                 :           1 :         const auto expected_error_str{strprintf("version=3 child tx %s (wtxid=%s) is too big: %u > %u virtual bytes",
     491   [ +  -  +  - ]:           2 :             tx_many_sigops->GetHash().ToString(), tx_many_sigops->GetWitnessHash().ToString(),
     492   [ +  -  +  - ]:           2 :             total_sigops * DEFAULT_BYTES_PER_SIGOP / WITNESS_SCALE_FACTOR, TRUC_CHILD_MAX_VSIZE)};
     493                 :           2 :         auto result{SingleTRUCChecks(tx_many_sigops, *ancestors, empty_conflicts_set,
     494   [ +  -  +  - ]:           1 :                                         GetVirtualTransactionSize(*tx_many_sigops, /*nSigOpCost=*/total_sigops, /*bytes_per_sigop=*/ DEFAULT_BYTES_PER_SIGOP))};
     495   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result->first, expected_error_str);
     496   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result->second, nullptr);
     497                 :             : 
     498   [ +  +  +  -  :           3 :         Package package_child_sigops{mempool_tx_v3, tx_many_sigops};
             -  -  -  - ]
     499   [ +  -  +  -  :           1 :         BOOST_CHECK_EQUAL(*PackageTRUCChecks(tx_many_sigops, total_sigops * DEFAULT_BYTES_PER_SIGOP / WITNESS_SCALE_FACTOR, package_child_sigops, empty_ancestors),
                   +  - ]
     500                 :             :                           expected_error_str);
     501         [ +  - ]:           2 :     }
     502                 :             : 
     503                 :             :     // Parent + child with TRUC in the mempool. Child is allowed as long as it is under TRUC_CHILD_MAX_VSIZE.
     504   [ +  -  +  -  :           2 :     auto tx_mempool_v3_child = make_tx({COutPoint{mempool_tx_v3->GetHash(), 0}}, /*version=*/3);
                   +  - ]
     505                 :           1 :     {
     506   [ +  -  +  -  :           2 :         BOOST_CHECK(GetTransactionWeight(*tx_mempool_v3_child) <= TRUC_CHILD_MAX_VSIZE * WITNESS_SCALE_FACTOR);
                   +  - ]
     507   [ +  -  +  - ]:           1 :         auto ancestors{pool.CalculateMemPoolAncestors(entry.FromTx(tx_mempool_v3_child), m_limits)};
     508   [ +  -  +  -  :           2 :         BOOST_CHECK(SingleTRUCChecks(tx_mempool_v3_child, *ancestors, empty_conflicts_set, GetVirtualTransactionSize(*tx_mempool_v3_child)) == std::nullopt);
          +  -  +  -  +  
                      - ]
     509   [ +  -  +  - ]:           1 :         AddToMempool(pool, entry.FromTx(tx_mempool_v3_child));
     510                 :             : 
     511   [ +  +  +  -  :           3 :         Package package_v3_1p1c{mempool_tx_v3, tx_mempool_v3_child};
             -  -  -  - ]
     512   [ +  -  +  -  :           2 :         BOOST_CHECK(PackageTRUCChecks(tx_mempool_v3_child, GetVirtualTransactionSize(*tx_mempool_v3_child), package_v3_1p1c, empty_ancestors) == std::nullopt);
             +  -  +  - ]
     513                 :           1 :     }
     514                 :             : 
     515                 :             :     // A TRUC transaction cannot have more than 1 descendant. Sibling is returned when exactly 1 exists.
     516                 :           1 :     {
     517   [ +  -  +  -  :           2 :         auto tx_v3_child2 = make_tx({COutPoint{mempool_tx_v3->GetHash(), 1}}, /*version=*/3);
                   +  - ]
     518                 :             : 
     519                 :             :         // Configuration where parent already has 1 other child in mempool
     520   [ +  -  +  - ]:           1 :         auto ancestors_1sibling{pool.CalculateMemPoolAncestors(entry.FromTx(tx_v3_child2), m_limits)};
     521         [ +  - ]:           1 :         const auto expected_error_str{strprintf("tx %s (wtxid=%s) would exceed descendant count limit",
     522   [ +  -  +  -  :           2 :             mempool_tx_v3->GetHash().ToString(), mempool_tx_v3->GetWitnessHash().ToString())};
                   +  - ]
     523   [ +  -  +  - ]:           1 :         auto result_with_sibling_eviction{SingleTRUCChecks(tx_v3_child2, *ancestors_1sibling, empty_conflicts_set, GetVirtualTransactionSize(*tx_v3_child2))};
     524   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result_with_sibling_eviction->first, expected_error_str);
     525                 :             :         // The other mempool child is returned to allow for sibling eviction.
     526   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result_with_sibling_eviction->second, tx_mempool_v3_child);
     527                 :             : 
     528                 :             :         // If directly replacing the child, make sure there is no double-counting.
     529   [ +  -  +  -  :           3 :         BOOST_CHECK(SingleTRUCChecks(tx_v3_child2, *ancestors_1sibling, {tx_mempool_v3_child->GetHash()}, GetVirtualTransactionSize(*tx_v3_child2))
          +  -  +  -  +  
                -  +  - ]
     530                 :             :                     == std::nullopt);
     531                 :             : 
     532   [ +  +  +  -  :           4 :         Package package_v3_1p2c{mempool_tx_v3, tx_mempool_v3_child, tx_v3_child2};
             -  -  -  - ]
     533   [ +  -  +  -  :           1 :         BOOST_CHECK_EQUAL(*PackageTRUCChecks(tx_v3_child2, GetVirtualTransactionSize(*tx_v3_child2), package_v3_1p2c, empty_ancestors),
             +  -  +  - ]
     534                 :             :                           expected_error_str);
     535                 :             : 
     536                 :             :         // Configuration where parent already has 2 other children in mempool (no sibling eviction allowed). This may happen as the result of a reorg.
     537   [ +  -  +  - ]:           1 :         AddToMempool(pool, entry.FromTx(tx_v3_child2));
     538   [ +  -  +  -  :           2 :         auto tx_v3_child3 = make_tx({COutPoint{mempool_tx_v3->GetHash(), 24}}, /*version=*/3);
                   +  - ]
     539         [ +  - ]:           1 :         auto entry_mempool_parent = pool.GetIter(mempool_tx_v3->GetHash().ToUint256()).value();
     540   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(entry_mempool_parent->GetCountWithDescendants(), 3);
     541   [ +  -  +  - ]:           1 :         auto ancestors_2siblings{pool.CalculateMemPoolAncestors(entry.FromTx(tx_v3_child3), m_limits)};
     542                 :             : 
     543   [ +  -  +  - ]:           1 :         auto result_2children{SingleTRUCChecks(tx_v3_child3, *ancestors_2siblings, empty_conflicts_set, GetVirtualTransactionSize(*tx_v3_child3))};
     544   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result_2children->first, expected_error_str);
     545                 :             :         // The other mempool child is not returned because sibling eviction is not allowed.
     546   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result_2children->second, nullptr);
     547   [ +  -  +  - ]:           2 :     }
     548                 :             : 
     549                 :             :     // Sibling eviction: parent already has 1 other child, which also has its own child (no sibling eviction allowed). This may happen as the result of a reorg.
     550                 :           1 :     {
     551   [ +  -  +  - ]:           1 :         auto tx_mempool_grandparent = make_tx(random_outpoints(1), /*version=*/3);
     552   [ +  -  +  -  :           2 :         auto tx_mempool_sibling = make_tx({COutPoint{tx_mempool_grandparent->GetHash(), 0}}, /*version=*/3);
                   +  - ]
     553   [ +  -  +  -  :           2 :         auto tx_mempool_nibling = make_tx({COutPoint{tx_mempool_sibling->GetHash(), 0}}, /*version=*/3);
                   +  - ]
     554   [ +  -  +  -  :           2 :         auto tx_to_submit = make_tx({COutPoint{tx_mempool_grandparent->GetHash(), 1}}, /*version=*/3);
                   +  - ]
     555                 :             : 
     556   [ +  -  +  - ]:           1 :         AddToMempool(pool, entry.FromTx(tx_mempool_grandparent));
     557   [ +  -  +  - ]:           1 :         AddToMempool(pool, entry.FromTx(tx_mempool_sibling));
     558   [ +  -  +  - ]:           1 :         AddToMempool(pool, entry.FromTx(tx_mempool_nibling));
     559                 :             : 
     560   [ +  -  +  - ]:           1 :         auto ancestors_3gen{pool.CalculateMemPoolAncestors(entry.FromTx(tx_to_submit), m_limits)};
     561         [ +  - ]:           1 :         const auto expected_error_str{strprintf("tx %s (wtxid=%s) would exceed descendant count limit",
     562   [ +  -  +  -  :           2 :             tx_mempool_grandparent->GetHash().ToString(), tx_mempool_grandparent->GetWitnessHash().ToString())};
                   +  - ]
     563   [ +  -  +  - ]:           1 :         auto result_3gen{SingleTRUCChecks(tx_to_submit, *ancestors_3gen, empty_conflicts_set, GetVirtualTransactionSize(*tx_to_submit))};
     564   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result_3gen->first, expected_error_str);
     565                 :             :         // The other mempool child is not returned because sibling eviction is not allowed.
     566   [ +  -  +  - ]:           1 :         BOOST_CHECK_EQUAL(result_3gen->second, nullptr);
     567   [ +  -  +  -  :           5 :     }
          +  -  +  -  +  
                      - ]
     568                 :             : 
     569                 :             :     // Configuration where tx has multiple generations of descendants is not tested because that is
     570                 :             :     // equivalent to the tx with multiple generations of ancestors.
     571   [ +  -  +  -  :          42 : }
          -  +  +  -  +  
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          +  -  +  -  +  
                -  +  - ]
     572                 :             : 
     573                 :             : BOOST_AUTO_TEST_SUITE_END()
        

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