diff options
Diffstat (limited to 'src/wallet/test')
-rw-r--r-- | src/wallet/test/coinselector_tests.cpp | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/src/wallet/test/coinselector_tests.cpp b/src/wallet/test/coinselector_tests.cpp index 3964e9adde..0f344b7c15 100644 --- a/src/wallet/test/coinselector_tests.cpp +++ b/src/wallet/test/coinselector_tests.cpp @@ -954,6 +954,53 @@ BOOST_AUTO_TEST_CASE(waste_test) } } + +BOOST_AUTO_TEST_CASE(bump_fee_test) +{ + const CAmount fee{100}; + const CAmount min_viable_change{200}; + const CAmount change_cost{125}; + const CAmount change_fee{35}; + const CAmount fee_diff{40}; + const CAmount target{2 * COIN}; + + { + SelectionResult selection{target, SelectionAlgorithm::MANUAL}; + add_coin(1 * COIN, 1, selection, /*fee=*/fee, /*long_term_fee=*/fee + fee_diff); + add_coin(2 * COIN, 2, selection, fee, fee + fee_diff); + const std::vector<std::shared_ptr<COutput>> inputs = selection.GetShuffledInputVector(); + + for (size_t i = 0; i < inputs.size(); ++i) { + inputs[i]->ApplyBumpFee(20*(i+1)); + } + + selection.ComputeAndSetWaste(min_viable_change, change_cost, change_fee); + CAmount expected_waste = fee_diff * -2 + change_cost + /*bump_fees=*/60; + BOOST_CHECK_EQUAL(expected_waste, selection.GetWaste()); + } + + { + // Test with changeless transaction + // + // Bump fees and excess both contribute fully to the waste score, + // therefore, a bump fee group discount will not change the waste + // score as long as we do not create change in both instances. + CAmount changeless_target = 3 * COIN - 2 * fee - 100; + SelectionResult selection{changeless_target, SelectionAlgorithm::MANUAL}; + add_coin(1 * COIN, 1, selection, /*fee=*/fee, /*long_term_fee=*/fee + fee_diff); + add_coin(2 * COIN, 2, selection, fee, fee + fee_diff); + const std::vector<std::shared_ptr<COutput>> inputs = selection.GetShuffledInputVector(); + + for (size_t i = 0; i < inputs.size(); ++i) { + inputs[i]->ApplyBumpFee(20*(i+1)); + } + + selection.ComputeAndSetWaste(min_viable_change, change_cost, change_fee); + CAmount expected_waste = fee_diff * -2 + /*bump_fees=*/60 + /*excess = 100 - bump_fees*/40; + BOOST_CHECK_EQUAL(expected_waste, selection.GetWaste()); + } +} + BOOST_AUTO_TEST_CASE(effective_value_test) { const int input_bytes = 148; |