Merge #12694: Actually disable BnB when there are preset inputs

081bf54 Test that BnB is not used when there are preset inputs (Andrew Chow)
6ef9982 Actually disable BnB when there are preset inputs (Andrew Chow)

Pull request description:

  We don't want to use BnB when there are preset inputs because there
  is some weirdness with making that work with using the KnapsackSolver
  as the fallback. Currently we say that we haven't used bnb when
  there are preset inputs, but we don't actually disable BnB. This fixes
  that.

  I thought this was done originally. I guess it got lost in a rebase somewhere.

Tree-SHA512: 9792c0cdd0736866bddbed20f10b8050104955dc589fba49a0bd61a582ba491c921af2cdcc2269678b7b69275dad5fcf89c71b75c28733c7bacbe52e55891b9c

3 files changed, 25 insertions, 11 deletions

diff --git a/src/wallet/test/coinselector_tests.cpp b/src/wallet/test/coinselector_tests.cpp
index f05c81cd4c..6c36e2e965 100644
--- a/src/wallet/test/coinselector_tests.cpp
+++ b/src/wallet/test/coinselector_tests.cpp
@@ -4,6 +4,7 @@
 
 #include "wallet/wallet.h"
 #include "wallet/coinselection.h"
+#include "wallet/coincontrol.h"
 #include "amount.h"
 #include "primitives/transaction.h"
 #include "random.h"
@@ -27,7 +28,7 @@ std::vector<std::unique_ptr<CWalletTx>> wtxn;
 typedef std::set<CInputCoin> CoinSet;
 
 static std::vector<COutput> vCoins;
-static const CWallet testWallet("dummy", CWalletDBWrapper::CreateDummy());
+static CWallet testWallet("dummy", CWalletDBWrapper::CreateDummy());
 static CAmount balance = 0;
 
 CoinEligibilityFilter filter_standard(1, 6, 0);
@@ -72,6 +73,7 @@ static void add_coin(const CAmount& nValue, int nAge = 6*24, bool fIsFromMe = fa
     }
     COutput output(wtx.get(), nInput, nAge, true /* spendable */, true /* solvable */, true /* safe */);
     vCoins.push_back(output);
+    testWallet.AddToWallet(*wtx.get());
     wtxn.emplace_back(std::move(wtx));
 }
 
@@ -222,6 +224,18 @@ BOOST_AUTO_TEST_CASE(bnb_search_test)
     add_coin(1);
     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, vCoins, setCoinsRet, nValueRet, coin_selection_params_bnb, bnb_used));
+
+    // Make sure that we aren't using BnB when there are preset inputs
+    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);
 }
 
 BOOST_AUTO_TEST_CASE(knapsack_solver_test)
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index d63c40d2ff..4a9a9fb930 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -2491,7 +2491,7 @@ bool CWallet::SelectCoinsMinConf(const CAmount& nTargetValue, const CoinEligibil
     }
 }
 
-bool CWallet::SelectCoins(const std::vector<COutput>& vAvailableCoins, const CAmount& nTargetValue, std::set<CInputCoin>& setCoinsRet, CAmount& nValueRet, const CCoinControl& coin_control, const CoinSelectionParams& coin_selection_params, bool& bnb_used) const
+bool CWallet::SelectCoins(const std::vector<COutput>& vAvailableCoins, const CAmount& nTargetValue, std::set<CInputCoin>& setCoinsRet, CAmount& nValueRet, const CCoinControl& coin_control, CoinSelectionParams& coin_selection_params, bool& bnb_used) const
 {
     std::vector<COutput> vCoins(vAvailableCoins);
 
@@ -2521,6 +2521,7 @@ bool CWallet::SelectCoins(const std::vector<COutput>& vAvailableCoins, const CAm
     {
         // For now, don't use BnB if preset inputs are selected. TODO: Enable this later
         bnb_used = false;
+        coin_selection_params.use_bnb = false;
 
         std::map<uint256, CWalletTx>::const_iterator it = mapWallet.find(outpoint.hash);
         if (it != mapWallet.end())
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
index 45d9762bde..0fa74bf0d1 100644
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -665,15 +665,6 @@ private:
     std::mutex mutexScanning;
     friend class WalletRescanReserver;
 
-
-    /**
-     * Select a set of coins such that nValueRet >= nTargetValue and at least
-     * all coins from coinControl are selected; Never select unconfirmed coins
-     * if they are not ours
-     */
-    bool SelectCoins(const std::vector<COutput>& vAvailableCoins, const CAmount& nTargetValue, std::set<CInputCoin>& setCoinsRet, CAmount& nValueRet,
-                    const CCoinControl& coin_control, const CoinSelectionParams& coin_selection_params, bool& bnb_used) const;
-
     CWalletDB *pwalletdbEncryption;
 
     //! the current wallet version: clients below this version are not able to load the wallet
@@ -766,6 +757,14 @@ public:
         return *dbw;
     }
 
+    /**
+     * Select a set of coins such that nValueRet >= nTargetValue and at least
+     * all coins from coinControl are selected; Never select unconfirmed coins
+     * if they are not ours
+     */
+    bool SelectCoins(const std::vector<COutput>& vAvailableCoins, const CAmount& nTargetValue, std::set<CInputCoin>& setCoinsRet, CAmount& nValueRet,
+                    const CCoinControl& coin_control, CoinSelectionParams& coin_selection_params, bool& bnb_used) const;
+
     /** Get a name for this wallet for logging/debugging purposes.
      */
     const std::string& GetName() const { return m_name; }