Prevent multiple calls to CWallet::AvailableCoins

src/wallet/wallet.cpp

@@ -1841,10 +1841,9 @@ bool CWallet::SelectCoinsMinConf(const CAmount& nTargetValue, int nConfMine, int
     return true;
 }
 
-bool CWallet::SelectCoins(const CAmount& nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, CAmount& nValueRet, const CCoinControl* coinControl) const
+bool CWallet::SelectCoins(const vector<COutput>& vAvailableCoins, const CAmount& nTargetValue, set<pair<const CWalletTx*,unsigned int> >& setCoinsRet, CAmount& nValueRet, const CCoinControl* coinControl) const
 {
-    vector<COutput> vCoins;
+    vector<COutput> vCoins(vAvailableCoins);
-    AvailableCoins(vCoins, true, coinControl);
 
     // coin control -> return all selected outputs (we want all selected to go into the transaction for sure)
     if (coinControl && coinControl->HasSelected() && !coinControl->fAllowOtherInputs)
@@ -2010,6 +2009,9 @@ bool CWallet::CreateTransaction(const vector<CRecipient>& vecSend, CWalletTx& wt
     {
         LOCK2(cs_main, cs_wallet);
         {
+            std::vector<COutput> vAvailableCoins;
+            AvailableCoins(vAvailableCoins, true, coinControl);
+
             nFeeRet = 0;
             // Start with no fee and loop until there is enough fee
             while (true)
@@ -2059,7 +2061,7 @@ bool CWallet::CreateTransaction(const vector<CRecipient>& vecSend, CWalletTx& wt
                 // Choose coins to use
                 set<pair<const CWalletTx*,unsigned int> > setCoins;
                 CAmount nValueIn = 0;
-                if (!SelectCoins(nValueToSelect, setCoins, nValueIn, coinControl))
+                if (!SelectCoins(vAvailableCoins, nValueToSelect, setCoins, nValueIn, coinControl))
                 {
                     strFailReason = _("Insufficient funds");
                     return false;

src/wallet/wallet.h

@@ -544,7 +544,7 @@ private:
      * all coins from coinControl are selected; Never select unconfirmed coins
      * if they are not ours
      */
-    bool SelectCoins(const CAmount& nTargetValue, std::set<std::pair<const CWalletTx*,unsigned int> >& setCoinsRet, CAmount& nValueRet, const CCoinControl *coinControl = NULL) const;
+    bool SelectCoins(const std::vector<COutput>& vAvailableCoins, const CAmount& nTargetValue, std::set<std::pair<const CWalletTx*,unsigned int> >& setCoinsRet, CAmount& nValueRet, const CCoinControl *coinControl = NULL) const;
 
     CWalletDB *pwalletdbEncryption;