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test: Check external coin effective value is used in CoinSelection

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Aurèle Oulès 2022-09-29 16:13:18 +02:00
parent 76b79c1a17
commit d0d9cf7aea
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src/wallet/test/coinselector_tests.cpp
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@ -922,5 +922,52 @@ BOOST_AUTO_TEST_CASE(effective_value_test)
BOOST_CHECK_EQUAL(output5.GetEffectiveValue(), nValue); // The effective value should be equal to the absolute value if input_bytes is -1
}
BOOST_AUTO_TEST_CASE(SelectCoins_effective_value_test)
{
// Test that the effective value is used to check whether preset inputs provide sufficient funds when subtract_fee_outputs is not used.
// This test creates a coin whose value is higher than the target but whose effective value is lower than the target.
// The coin is selected using coin control, with m_allow_other_inputs = false. SelectCoins should fail due to insufficient funds.
std::unique_ptr<CWallet> wallet = std::make_unique<CWallet>(m_node.chain.get(), "", m_args, CreateMockWalletDatabase());
wallet->LoadWallet();
LOCK(wallet->cs_wallet);
wallet->SetWalletFlag(WALLET_FLAG_DESCRIPTORS);
wallet->SetupDescriptorScriptPubKeyMans();
CoinsResult available_coins;
{
std::unique_ptr<CWallet> dummyWallet = std::make_unique<CWallet>(m_node.chain.get(), "dummy", m_args, CreateMockWalletDatabase());
dummyWallet->LoadWallet();
LOCK(dummyWallet->cs_wallet);
dummyWallet->SetWalletFlag(WALLET_FLAG_DESCRIPTORS);
dummyWallet->SetupDescriptorScriptPubKeyMans();
add_coin(available_coins, *dummyWallet, 100000); // 0.001 BTC
}
CAmount target{99900}; // 0.000999 BTC
FastRandomContext rand;
CoinSelectionParams cs_params{
rand,
/*change_output_size=*/34,
/*change_spend_size=*/148,
/*min_change_target=*/1000,
/*effective_feerate=*/CFeeRate(3000),
/*long_term_feerate=*/CFeeRate(1000),
/*discard_feerate=*/CFeeRate(1000),
/*tx_noinputs_size=*/0,
/*avoid_partial=*/false,
};
CCoinControl cc;
cc.m_allow_other_inputs = false;
COutput output = available_coins.All().at(0);
cc.SetInputWeight(output.outpoint, 148);
cc.SelectExternal(output.outpoint, output.txout);
const auto result = SelectCoins(*wallet, available_coins, target, cc, cs_params);
BOOST_CHECK(!result);
}
BOOST_AUTO_TEST_SUITE_END()
} // namespace wallet