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Merge #17290: Enable BnB coin selection for preset inputs and subtract fee from outputs

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b007efdf19 Allow BnB when subtract fee from outputs (Andrew Chow)
db15e71e79 Use BnB when preset inputs are selected (Andrew Chow)

Pull request description:

  Currently we explicitly disable BnB when there are preset inputs selected or when the subtract fee from outputs option is enabled. This PR enables BnB for both cases.

  Kind of an alternative to #17246 (implements the subtract fee from outputs part of it) and borrows a test from there too.

ACKs for top commit:
  instagibbs:
    reACK b007efdf19
  Sjors:
    re-ACK b007efdf19

Tree-SHA512: 933276b09b2fa2ab43db7f0b98762f06f6f5fa8606195f96aca9fa1cb71ae4ee7156028dd482b1cada82ddd0996a9daf12ea5c152589fdf192cd96cbc51e99df
This commit is contained in:
Samuel Dobson
2019-11-23 08:06:14 +13:00
parent bb862d7864 b007efdf19
commit cef87f7a48
3 changed files with 82 additions and 33 deletions
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52
src/wallet/test/coinselector_tests.cpp
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@@ -55,7 +55,7 @@ static void add_coin(const CAmount& nValue, int nInput, CoinSet& set)
set.emplace(MakeTransactionRef(tx), nInput);
}
static void add_coin(const CAmount& nValue, int nAge = 6*24, bool fIsFromMe = false, int nInput=0)
static void add_coin(CWallet& wallet, const CAmount& nValue, int nAge = 6*24, bool fIsFromMe = false, int nInput=0, bool spendable = false)
{
balance += nValue;
static int nextLockTime = 0;
@@ -63,21 +63,31 @@ static void add_coin(const CAmount& nValue, int nAge = 6*24, bool fIsFromMe = fa
tx.nLockTime = nextLockTime++; // so all transactions get different hashes
tx.vout.resize(nInput + 1);
tx.vout[nInput].nValue = nValue;
if (spendable) {
CTxDestination dest;
std::string error;
assert(wallet.GetNewDestination(OutputType::BECH32, "", dest, error));
tx.vout[nInput].scriptPubKey = GetScriptForDestination(dest);
}
if (fIsFromMe) {
// IsFromMe() returns (GetDebit() > 0), and GetDebit() is 0 if vin.empty(),
// so stop vin being empty, and cache a non-zero Debit to fake out IsFromMe()
tx.vin.resize(1);
}
std::unique_ptr<CWalletTx> wtx = MakeUnique<CWalletTx>(&testWallet, MakeTransactionRef(std::move(tx)));
std::unique_ptr<CWalletTx> wtx = MakeUnique<CWalletTx>(&wallet, MakeTransactionRef(std::move(tx)));
if (fIsFromMe)
{
wtx->m_amounts[CWalletTx::DEBIT].Set(ISMINE_SPENDABLE, 1);
}
COutput output(wtx.get(), nInput, nAge, true /* spendable */, true /* solvable */, true /* safe */);
vCoins.push_back(output);
testWallet.AddToWallet(*wtx.get());
wallet.AddToWallet(*wtx.get());
wtxn.emplace_back(std::move(wtx));
}
static void add_coin(const CAmount& nValue, int nAge = 6*24, bool fIsFromMe = false, int nInput=0, bool spendable = false)
{
add_coin(testWallet, nValue, nAge, fIsFromMe, nInput, spendable);
}
static void empty_wallet(void)
{
@@ -252,17 +262,33 @@ BOOST_AUTO_TEST_CASE(bnb_search_test)
vCoins.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(!testWallet.SelectCoinsMinConf( 1 * CENT, filter_standard, GroupCoins(vCoins), setCoinsRet, nValueRet, coin_selection_params_bnb, bnb_used));
// Make sure that we aren't using BnB when there are preset inputs
// Test fees subtracted from output:
empty_wallet();
add_coin(5 * CENT);
add_coin(3 * CENT);
add_coin(2 * CENT);
CCoinControl coin_control;
coin_control.fAllowOtherInputs = true;
coin_control.Select(COutPoint(vCoins.at(0).tx->GetHash(), vCoins.at(0).i));
BOOST_CHECK(testWallet.SelectCoins(vCoins, 10 * CENT, setCoinsRet, nValueRet, coin_control, coin_selection_params_bnb, bnb_used));
BOOST_CHECK(!bnb_used);
BOOST_CHECK(!coin_selection_params_bnb.use_bnb);
add_coin(1 * CENT);
vCoins.at(0).nInputBytes = 40;
BOOST_CHECK(!testWallet.SelectCoinsMinConf( 1 * CENT, filter_standard, GroupCoins(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, GroupCoins(vCoins), setCoinsRet, nValueRet, coin_selection_params_bnb, bnb_used));
BOOST_CHECK_EQUAL(nValueRet, 1 * CENT);
// Make sure that can use BnB when there are preset inputs
empty_wallet();
{
std::unique_ptr<CWallet> wallet = MakeUnique<CWallet>(m_chain.get(), WalletLocation(), WalletDatabase::CreateMock());
bool firstRun;
wallet->LoadWallet(firstRun);
LOCK(wallet->cs_wallet);
add_coin(*wallet, 5 * CENT, 6 * 24, false, 0, true);
add_coin(*wallet, 3 * CENT, 6 * 24, false, 0, true);
add_coin(*wallet, 2 * CENT, 6 * 24, false, 0, true);
CCoinControl coin_control;
coin_control.fAllowOtherInputs = true;
coin_control.Select(COutPoint(vCoins.at(0).tx->GetHash(), vCoins.at(0).i));
coin_selection_params_bnb.effective_fee = CFeeRate(0);
BOOST_CHECK(wallet->SelectCoins(vCoins, 10 * CENT, setCoinsRet, nValueRet, coin_control, coin_selection_params_bnb, bnb_used));
BOOST_CHECK(bnb_used);
BOOST_CHECK(coin_selection_params_bnb.use_bnb);
}
}
BOOST_AUTO_TEST_CASE(knapsack_solver_test)