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Do both BnB and Knapsack coin selection in SelectCoinsMinConf

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Instead of switching which algorithm to use based on use_bnb, just run
both in SelectCoinsMinConf. If BnB fails, do Knapsack.
This commit is contained in:
Andrew Chow
2019-10-30 16:08:55 -04:00
parent 01dc8ebda5
commit de26eb0e1f
2 changed files with 21 additions and 22 deletions
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22
src/wallet/test/coinselector_tests.cpp
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@@ -287,9 +287,9 @@ BOOST_AUTO_TEST_CASE(bnb_search_test)
empty_wallet();
add_coin(1 * CENT);
vCoins.at(0).nInputBytes = 40;
BOOST_CHECK(!testWallet.SelectCoinsMinConf( 1 * CENT, filter_standard, vCoins, setCoinsRet, nValueRet, coin_selection_params_bnb, bnb_used));
coin_selection_params_bnb.m_subtract_fee_outputs = true;
BOOST_CHECK(testWallet.SelectCoinsMinConf( 1 * CENT, filter_standard, vCoins, setCoinsRet, nValueRet, coin_selection_params_bnb, bnb_used));
BOOST_CHECK(bnb_used);
BOOST_CHECK_EQUAL(nValueRet, 1 * CENT);
// Make sure that can use BnB when there are preset inputs
@@ -549,17 +549,19 @@ BOOST_AUTO_TEST_CASE(knapsack_solver_test)
for (int i = 0; i < RUN_TESTS; i++) {
// picking 50 from 100 coins doesn't depend on the shuffle,
// but does depend on randomness in the stochastic approximation code
BOOST_CHECK(testWallet.SelectCoinsMinConf(50 * COIN, filter_standard, vCoins, setCoinsRet , nValueRet, coin_selection_params, bnb_used));
BOOST_CHECK(testWallet.SelectCoinsMinConf(50 * COIN, filter_standard, vCoins, setCoinsRet2, nValueRet, coin_selection_params, bnb_used));
BOOST_CHECK(KnapsackSolver(50 * COIN, GroupCoins(vCoins), setCoinsRet, nValueRet));
BOOST_CHECK(KnapsackSolver(50 * COIN, GroupCoins(vCoins), setCoinsRet2, nValueRet));
BOOST_CHECK(!equal_sets(setCoinsRet, setCoinsRet2));
int fails = 0;
for (int j = 0; j < RANDOM_REPEATS; j++)
{
// selecting 1 from 100 identical coins depends on the shuffle; this test will fail 1% of the time
// run the test RANDOM_REPEATS times and only complain if all of them fail
BOOST_CHECK(testWallet.SelectCoinsMinConf(COIN, filter_standard, vCoins, setCoinsRet , nValueRet, coin_selection_params, bnb_used));
BOOST_CHECK(testWallet.SelectCoinsMinConf(COIN, filter_standard, vCoins, setCoinsRet2, nValueRet, coin_selection_params, bnb_used));
// Test that the KnapsackSolver selects randomly from equivalent coins (same value and same input size).
// When choosing 1 from 100 identical coins, 1% of the time, this test will choose the same coin twice
// which will cause it to fail.
// To avoid that issue, run the test RANDOM_REPEATS times and only complain if all of them fail
BOOST_CHECK(KnapsackSolver(COIN, GroupCoins(vCoins), setCoinsRet, nValueRet));
BOOST_CHECK(KnapsackSolver(COIN, GroupCoins(vCoins), setCoinsRet2, nValueRet));
if (equal_sets(setCoinsRet, setCoinsRet2))
fails++;
}
@@ -579,10 +581,8 @@ BOOST_AUTO_TEST_CASE(knapsack_solver_test)
int fails = 0;
for (int j = 0; j < RANDOM_REPEATS; j++)
{
// selecting 1 from 100 identical coins depends on the shuffle; this test will fail 1% of the time
// run the test RANDOM_REPEATS times and only complain if all of them fail
BOOST_CHECK(testWallet.SelectCoinsMinConf(90*CENT, filter_standard, vCoins, setCoinsRet , nValueRet, coin_selection_params, bnb_used));
BOOST_CHECK(testWallet.SelectCoinsMinConf(90*CENT, filter_standard, vCoins, setCoinsRet2, nValueRet, coin_selection_params, bnb_used));
BOOST_CHECK(KnapsackSolver(90*CENT, GroupCoins(vCoins), setCoinsRet, nValueRet));
BOOST_CHECK(KnapsackSolver(90*CENT, GroupCoins(vCoins), setCoinsRet2, nValueRet));
if (equal_sets(setCoinsRet, setCoinsRet2))
fails++;
}