Function BOOST_FIXTURE_TEST_CASE

src/test/rbf_tests.cpp:58–162

}

BOOST_FIXTURE_TEST_CASE(rbf_helper_functions, TestChain100Setup)
{
    CTxMemPool& pool = *Assert(m_node.mempool);
    LOCK2(::cs_main, pool.cs);
    TestMemPoolEntryHelper entry;

    const CAmount low_fee{CENT/100};
    const CAmount normal_fee{CENT/10};
    const CAmount high_fee{CENT};

    // Create a parent tx1 and child tx2 with normal fees:
    const auto tx1 = make_tx(/*inputs=*/ {m_coinbase_txns[0]}, /*output_values=*/ {10 * COIN});
    TryAddToMempool(pool, entry.Fee(normal_fee).FromTx(tx1));
    const auto tx2 = make_tx(/*inputs=*/ {tx1}, /*output_values=*/ {995 * CENT});
    TryAddToMempool(pool, entry.Fee(normal_fee).FromTx(tx2));

    // Create a low-feerate parent tx3 and high-feerate child tx4 (cpfp)
    const auto tx3 = make_tx(/*inputs=*/ {m_coinbase_txns[1]}, /*output_values=*/ {1099 * CENT});
    TryAddToMempool(pool, entry.Fee(low_fee).FromTx(tx3));
    const auto tx4 = make_tx(/*inputs=*/ {tx3}, /*output_values=*/ {999 * CENT});
    TryAddToMempool(pool, entry.Fee(high_fee).FromTx(tx4));

    // Create a parent tx5 and child tx6 where both have very low fees
    const auto tx5 = make_tx(/*inputs=*/ {m_coinbase_txns[2]}, /*output_values=*/ {1099 * CENT});
    TryAddToMempool(pool, entry.Fee(low_fee).FromTx(tx5));
    const auto tx6 = make_tx(/*inputs=*/ {tx5}, /*output_values=*/ {1098 * CENT});
    TryAddToMempool(pool, entry.Fee(low_fee).FromTx(tx6));
    // Make tx6's modified fee much higher than its base fee. This should cause it to pass
    // the fee-related checks despite being low-feerate.
    pool.PrioritiseTransaction(tx6->GetHash(), 1 * COIN);

    // Two independent high-feerate transactions, tx7 and tx8
    const auto tx7 = make_tx(/*inputs=*/ {m_coinbase_txns[3]}, /*output_values=*/ {999 * CENT});
    TryAddToMempool(pool, entry.Fee(high_fee).FromTx(tx7));
    const auto tx8 = make_tx(/*inputs=*/ {m_coinbase_txns[4]}, /*output_values=*/ {999 * CENT});
    TryAddToMempool(pool, entry.Fee(high_fee).FromTx(tx8));

    // Will make these two parents of single child
    const auto tx11 = make_tx(/*inputs=*/ {m_coinbase_txns[7]}, /*output_values=*/ {995 * CENT});
    TryAddToMempool(pool, entry.Fee(normal_fee).FromTx(tx11));
    const auto tx12 = make_tx(/*inputs=*/ {m_coinbase_txns[8]}, /*output_values=*/ {995 * CENT});
    TryAddToMempool(pool, entry.Fee(normal_fee).FromTx(tx12));

    // Will make two children of this single parent
    const auto tx13 = make_tx(/*inputs=*/ {m_coinbase_txns[9]}, /*output_values=*/ {995 * CENT, 995 * CENT});
    TryAddToMempool(pool, entry.Fee(normal_fee).FromTx(tx13));

    const auto entry1_normal = pool.GetIter(tx1->GetHash()).value();
    const auto entry2_normal = pool.GetIter(tx2->GetHash()).value();
    const auto entry3_low = pool.GetIter(tx3->GetHash()).value();
    const auto entry4_high = pool.GetIter(tx4->GetHash()).value();
    const auto entry5_low = pool.GetIter(tx5->GetHash()).value();
    const auto entry6_low_prioritised = pool.GetIter(tx6->GetHash()).value();
    const auto entry7_high = pool.GetIter(tx7->GetHash()).value();
    const auto entry8_high = pool.GetIter(tx8->GetHash()).value();

    BOOST_CHECK_EQUAL(entry1_normal->GetFee(), normal_fee);
    BOOST_CHECK_EQUAL(entry2_normal->GetFee(), normal_fee);