highperfocused/bitcoin
1
0
Fork 0
mirror of https://github.com/bitcoin/bitcoin.git synced 2025-11-13 07:28:59 +01:00
Code Issues Packages Projects Releases Wiki Activity

Return SelectionResult from SelectCoinsBnB

Browse Source 
Removes coins_out and value_ret has SelectCoinsBnB return a
std::optional<SelectionResult>
This commit is contained in:
Andrew Chow
2020-11-16 14:31:45 -05:00
parent a339add471
commit 60d2ca72e3
5 changed files with 60 additions and 70 deletions
Download Patch File Download Diff File Expand all files Collapse all files

95
src/wallet/test/coinselector_tests.cpp
View File

@@ -14,6 +14,7 @@
#include <wallet/test/wallet_test_fixture.h>
#include <wallet/wallet.h>
#include <algorithm>
#include <boost/test/unit_test.hpp>
#include <random>
@@ -95,20 +96,22 @@ static void add_coin(std::vector<COutput>& coins, CWallet& wallet, const CAmount
coins.push_back(output);
}
static bool equivalent_sets(CoinSet a, CoinSet b)
/** Check if SelectionResult a is equivalent to SelectionResult b.
* Equivalent means same input values, but maybe different inputs (i.e. same value, different prevout) */
static bool EquivalentResult(const SelectionResult& a, const SelectionResult& b)
{
std::vector<CAmount> a_amts;
std::vector<CAmount> b_amts;
for (const auto& coin : a) {
for (const auto& coin : a.GetInputSet()) {
a_amts.push_back(coin.txout.nValue);
}
for (const auto& coin : b) {
for (const auto& coin : b.GetInputSet()) {
b_amts.push_back(coin.txout.nValue);
}
std::sort(a_amts.begin(), a_amts.end());
std::sort(b_amts.begin(), b_amts.end());
std::pair<std::vector<CAmount>::iterator, std::vector<CAmount>::iterator> ret = mismatch(a_amts.begin(), a_amts.end(), b_amts.begin());
std::pair<std::vector<CAmount>::iterator, std::vector<CAmount>::iterator> ret = std::mismatch(a_amts.begin(), a_amts.end(), b_amts.begin());
return ret.first == a_amts.end() && ret.second == b_amts.end();
}
@@ -168,17 +171,14 @@ BOOST_AUTO_TEST_CASE(bnb_search_test)
{
// Setup
std::vector<CInputCoin> utxo_pool;
CoinSet selection;
SelectionResult expected_result(CAmount(0));
CAmount value_ret = 0;
/////////////////////////
// Known Outcome tests //
/////////////////////////
// Empty utxo pool
BOOST_CHECK(!SelectCoinsBnB(GroupCoins(utxo_pool), 1 * CENT, 0.5 * CENT, selection, value_ret));
selection.clear();
BOOST_CHECK(!SelectCoinsBnB(GroupCoins(utxo_pool), 1 * CENT, 0.5 * CENT));
// Add utxos
add_coin(1 * CENT, 1, utxo_pool);
@@ -188,78 +188,77 @@ BOOST_AUTO_TEST_CASE(bnb_search_test)
// Select 1 Cent
add_coin(1 * CENT, 1, expected_result);
BOOST_CHECK(SelectCoinsBnB(GroupCoins(utxo_pool), 1 * CENT, 0.5 * CENT, selection, value_ret));
BOOST_CHECK(equivalent_sets(selection, expected_result.GetInputSet()));
BOOST_CHECK_EQUAL(value_ret, 1 * CENT);
const auto result1 = SelectCoinsBnB(GroupCoins(utxo_pool), 1 * CENT, 0.5 * CENT);
BOOST_CHECK(result1);
BOOST_CHECK(EquivalentResult(expected_result, *result1));
BOOST_CHECK_EQUAL(result1->GetSelectedValue(), 1 * CENT);
expected_result.Clear();
selection.clear();
// Select 2 Cent
add_coin(2 * CENT, 2, expected_result);
BOOST_CHECK(SelectCoinsBnB(GroupCoins(utxo_pool), 2 * CENT, 0.5 * CENT, selection, value_ret));
BOOST_CHECK(equivalent_sets(selection, expected_result.GetInputSet()));
BOOST_CHECK_EQUAL(value_ret, 2 * CENT);
const auto result2 = SelectCoinsBnB(GroupCoins(utxo_pool), 2 * CENT, 0.5 * CENT);
BOOST_CHECK(result2);
BOOST_CHECK(EquivalentResult(expected_result, *result2));
BOOST_CHECK_EQUAL(result2->GetSelectedValue(), 2 * CENT);
expected_result.Clear();
selection.clear();
// Select 5 Cent
add_coin(4 * CENT, 4, expected_result);
add_coin(1 * CENT, 1, expected_result);
BOOST_CHECK(SelectCoinsBnB(GroupCoins(utxo_pool), 5 * CENT, 0.5 * CENT, selection, value_ret));
BOOST_CHECK(equivalent_sets(selection, expected_result.GetInputSet()));
BOOST_CHECK_EQUAL(value_ret, 5 * CENT);
const auto result3 = SelectCoinsBnB(GroupCoins(utxo_pool), 5 * CENT, 0.5 * CENT);
BOOST_CHECK(result3);
BOOST_CHECK(EquivalentResult(expected_result, *result3));
BOOST_CHECK_EQUAL(result3->GetSelectedValue(), 5 * CENT);
expected_result.Clear();
selection.clear();
// Select 11 Cent, not possible
BOOST_CHECK(!SelectCoinsBnB(GroupCoins(utxo_pool), 11 * CENT, 0.5 * CENT, selection, value_ret));
BOOST_CHECK(!SelectCoinsBnB(GroupCoins(utxo_pool), 11 * CENT, 0.5 * CENT));
expected_result.Clear();
selection.clear();
// Cost of change is greater than the difference between target value and utxo sum
add_coin(1 * CENT, 1, expected_result);
BOOST_CHECK(SelectCoinsBnB(GroupCoins(utxo_pool), 0.9 * CENT, 0.5 * CENT, selection, value_ret));
BOOST_CHECK_EQUAL(value_ret, 1 * CENT);
BOOST_CHECK(equivalent_sets(selection, expected_result.GetInputSet()));
const auto result4 = SelectCoinsBnB(GroupCoins(utxo_pool), 0.9 * CENT, 0.5 * CENT);
BOOST_CHECK(result4);
BOOST_CHECK_EQUAL(result4->GetSelectedValue(), 1 * CENT);
BOOST_CHECK(EquivalentResult(expected_result, *result4));
expected_result.Clear();
selection.clear();
// Cost of change is less than the difference between target value and utxo sum
BOOST_CHECK(!SelectCoinsBnB(GroupCoins(utxo_pool), 0.9 * CENT, 0, selection, value_ret));
BOOST_CHECK(!SelectCoinsBnB(GroupCoins(utxo_pool), 0.9 * CENT, 0));
expected_result.Clear();
selection.clear();
// Select 10 Cent
add_coin(5 * CENT, 5, utxo_pool);
add_coin(5 * CENT, 5, expected_result);
add_coin(4 * CENT, 4, expected_result);
add_coin(1 * CENT, 1, expected_result);
BOOST_CHECK(SelectCoinsBnB(GroupCoins(utxo_pool), 10 * CENT, 0.5 * CENT, selection, value_ret));
BOOST_CHECK(equivalent_sets(selection, expected_result.GetInputSet()));
BOOST_CHECK_EQUAL(value_ret, 10 * CENT);
const auto result5 = SelectCoinsBnB(GroupCoins(utxo_pool), 10 * CENT, 0.5 * CENT);
BOOST_CHECK(result5);
BOOST_CHECK(EquivalentResult(expected_result, *result5));
BOOST_CHECK_EQUAL(result5->GetSelectedValue(), 10 * CENT);
expected_result.Clear();
selection.clear();
// Negative effective value
// Select 10 Cent but have 1 Cent not be possible because too small
add_coin(5 * CENT, 5, expected_result);
add_coin(3 * CENT, 3, expected_result);
add_coin(2 * CENT, 2, expected_result);
BOOST_CHECK(SelectCoinsBnB(GroupCoins(utxo_pool), 10 * CENT, 5000, selection, value_ret));
BOOST_CHECK_EQUAL(value_ret, 10 * CENT);
const auto result6 = SelectCoinsBnB(GroupCoins(utxo_pool), 10 * CENT, 5000);
BOOST_CHECK(result6);
BOOST_CHECK_EQUAL(result6->GetSelectedValue(), 10 * CENT);
// FIXME: this test is redundant with the above, because 1 Cent is selected, not "too small"
// BOOST_CHECK(equivalent_sets(selection, expected_result.GetInputSet()));
// BOOST_CHECK(EquivalentResult(expected_result, *result));
// Select 0.25 Cent, not possible
BOOST_CHECK(!SelectCoinsBnB(GroupCoins(utxo_pool), 0.25 * CENT, 0.5 * CENT, selection, value_ret));
BOOST_CHECK(!SelectCoinsBnB(GroupCoins(utxo_pool), 0.25 * CENT, 0.5 * CENT));
expected_result.Clear();
selection.clear();
// Iteration exhaustion test
CAmount target = make_hard_case(17, utxo_pool);
BOOST_CHECK(!SelectCoinsBnB(GroupCoins(utxo_pool), target, 0, selection, value_ret)); // Should exhaust
BOOST_CHECK(!SelectCoinsBnB(GroupCoins(utxo_pool), target, 0)); // Should exhaust
target = make_hard_case(14, utxo_pool);
BOOST_CHECK(SelectCoinsBnB(GroupCoins(utxo_pool), target, 0, selection, value_ret)); // Should not exhaust
const auto result7 = SelectCoinsBnB(GroupCoins(utxo_pool), target, 0); // Should not exhaust
BOOST_CHECK(result7);
// Test same value early bailout optimization
utxo_pool.clear();
@@ -276,9 +275,10 @@ BOOST_AUTO_TEST_CASE(bnb_search_test)
for (int i = 0; i < 50000; ++i) {
add_coin(5 * CENT, 7, utxo_pool);
}
BOOST_CHECK(SelectCoinsBnB(GroupCoins(utxo_pool), 30 * CENT, 5000, selection, value_ret));
BOOST_CHECK_EQUAL(value_ret, 30 * CENT);
BOOST_CHECK(equivalent_sets(selection, expected_result.GetInputSet()));
const auto result8 = SelectCoinsBnB(GroupCoins(utxo_pool), 30 * CENT, 5000);
BOOST_CHECK(result8);
BOOST_CHECK_EQUAL(result8->GetSelectedValue(), 30 * CENT);
BOOST_CHECK(EquivalentResult(expected_result, *result8));
////////////////////
// Behavior tests //
@@ -290,7 +290,7 @@ BOOST_AUTO_TEST_CASE(bnb_search_test)
}
// Run 100 times, to make sure it is never finding a solution
for (int i = 0; i < 100; ++i) {
BOOST_CHECK(!SelectCoinsBnB(GroupCoins(utxo_pool), 1 * CENT, 2 * CENT, selection, value_ret));
BOOST_CHECK(!SelectCoinsBnB(GroupCoins(utxo_pool), 1 * CENT, 2 * CENT));
}
// Make sure that effective value is working in AttemptSelection when BnB is used
@@ -306,20 +306,19 @@ BOOST_AUTO_TEST_CASE(bnb_search_test)
wallet->SetupDescriptorScriptPubKeyMans();
std::vector<COutput> coins;
CoinSet setCoinsRet;
CAmount nValueRet;
add_coin(coins, *wallet, 1);
coins.at(0).nInputBytes = 40; // Make sure that it has a negative effective value. The next check should assert if this somehow got through. Otherwise it will fail
BOOST_CHECK(!SelectCoinsBnB(GroupCoins(coins), 1 * CENT, coin_selection_params_bnb.m_cost_of_change, setCoinsRet, nValueRet));
BOOST_CHECK(!SelectCoinsBnB(GroupCoins(coins), 1 * CENT, coin_selection_params_bnb.m_cost_of_change));
// Test fees subtracted from output:
coins.clear();
add_coin(coins, *wallet, 1 * CENT);
coins.at(0).nInputBytes = 40;
coin_selection_params_bnb.m_subtract_fee_outputs = true;
BOOST_CHECK(SelectCoinsBnB(GroupCoins(coins), 1 * CENT, coin_selection_params_bnb.m_cost_of_change, setCoinsRet, nValueRet));
BOOST_CHECK_EQUAL(nValueRet, 1 * CENT);
const auto result9 = SelectCoinsBnB(GroupCoins(coins), 1 * CENT, coin_selection_params_bnb.m_cost_of_change);
BOOST_CHECK(result9);
BOOST_CHECK_EQUAL(result9->GetSelectedValue(), 1 * CENT);
}
{