Remove coinselection.h -> wallet.h circular dependency

Changes CInputCoin to coinselection and to use CTransactionRef in
order to avoid a circular dependency. Also moves other coin selection
specific variables out of wallet.h to coinselectoin.h

src/wallet/coinselection.h

@@ -8,7 +8,44 @@
 #include <amount.h>
 #include <primitives/transaction.h>
 #include <random.h>
-#include <wallet/wallet.h>
+
+//! target minimum change amount
+static const CAmount MIN_CHANGE = CENT;
+//! final minimum change amount after paying for fees
+static const CAmount MIN_FINAL_CHANGE = MIN_CHANGE/2;
+
+class CInputCoin {
+public:
+    CInputCoin(const CTransactionRef& tx, unsigned int i)
+    {
+        if (!tx)
+            throw std::invalid_argument("tx should not be null");
+        if (i >= tx->vout.size())
+            throw std::out_of_range("The output index is out of range");
+
+        outpoint = COutPoint(tx->GetHash(), i);
+        txout = tx->vout[i];
+        effective_value = txout.nValue;
+    }
+
+    COutPoint outpoint;
+    CTxOut txout;
+    CAmount effective_value;
+    CAmount fee = 0;
+    CAmount long_term_fee = 0;
+
+    bool operator<(const CInputCoin& rhs) const {
+        return outpoint < rhs.outpoint;
+    }
+
+    bool operator!=(const CInputCoin& rhs) const {
+        return outpoint != rhs.outpoint;
+    }
+
+    bool operator==(const CInputCoin& rhs) const {
+        return outpoint == rhs.outpoint;
+    }
+};
 
 bool SelectCoinsBnB(std::vector<CInputCoin>& utxo_pool, const CAmount& target_value, const CAmount& cost_of_change, std::set<CInputCoin>& out_set, CAmount& value_ret, CAmount not_input_fees);
 

src/wallet/wallet.cpp

@@ -2516,7 +2516,7 @@ bool CWallet::SelectCoinsMinConf(const CAmount& nTargetValue, const CoinEligibil
         if (!OutputEligibleForSpending(output, eligibilty_filter))
             continue;
 
-        CInputCoin coin = CInputCoin(output.tx, output.i);
+        CInputCoin coin = CInputCoin(output.tx->tx, output.i);
 
         if (coin.txout.nValue == nTargetValue)
         {
@@ -2606,7 +2606,7 @@ bool CWallet::SelectCoins(const std::vector<COutput>& vAvailableCoins, const CAm
             if (!out.fSpendable)
                  continue;
             nValueRet += out.tx->tx->vout[out.i].nValue;
-            setCoinsRet.insert(CInputCoin(out.tx, out.i));
+            setCoinsRet.insert(CInputCoin(out.tx->tx, out.i));
         }
         return (nValueRet >= nTargetValue);
     }
@@ -2628,7 +2628,7 @@ bool CWallet::SelectCoins(const std::vector<COutput>& vAvailableCoins, const CAm
             if (pcoin->tx->vout.size() <= outpoint.n)
                 return false;
             nValueFromPresetInputs += pcoin->tx->vout[outpoint.n].nValue;
-            setPresetCoins.insert(CInputCoin(pcoin, outpoint.n));
+            setPresetCoins.insert(CInputCoin(pcoin->tx, outpoint.n));
         } else
             return false; // TODO: Allow non-wallet inputs
     }
@@ -2636,7 +2636,7 @@ bool CWallet::SelectCoins(const std::vector<COutput>& vAvailableCoins, const CAm
     // remove preset inputs from vCoins
     for (std::vector<COutput>::iterator it = vCoins.begin(); it != vCoins.end() && coinControl && coinControl->HasSelected();)
     {
-        if (setPresetCoins.count(CInputCoin(it->tx, it->i)))
+        if (setPresetCoins.count(CInputCoin(it->tx->tx, it->i)))
             it = vCoins.erase(it);
         else
             ++it;

src/wallet/wallet.h

@@ -17,6 +17,7 @@
 #include <script/sign.h>
 #include <util.h>
 #include <wallet/crypter.h>
+#include <wallet/coinselection.h>
 #include <wallet/walletdb.h>
 #include <wallet/rpcwallet.h>
 
@@ -53,10 +54,6 @@ static const CAmount DEFAULT_DISCARD_FEE = 10000;
 static const CAmount DEFAULT_TRANSACTION_MINFEE = 1000;
 //! minimum recommended increment for BIP 125 replacement txs
 static const CAmount WALLET_INCREMENTAL_RELAY_FEE = 5000;
-//! target minimum change amount
-static const CAmount MIN_CHANGE = CENT;
-//! final minimum change amount after paying for fees
-static const CAmount MIN_FINAL_CHANGE = MIN_CHANGE/2;
 //! Default for -spendzeroconfchange
 static const bool DEFAULT_SPEND_ZEROCONF_CHANGE = true;
 //! Default for -walletrejectlongchains
@@ -497,40 +494,6 @@ public:
     std::set<uint256> GetConflicts() const;
 };
 
-
-class CInputCoin {
-public:
-    CInputCoin(const CWalletTx* walletTx, unsigned int i)
-    {
-        if (!walletTx)
-            throw std::invalid_argument("walletTx should not be null");
-        if (i >= walletTx->tx->vout.size())
-            throw std::out_of_range("The output index is out of range");
-
-        outpoint = COutPoint(walletTx->GetHash(), i);
-        txout = walletTx->tx->vout[i];
-        effective_value = txout.nValue;
-    }
-
-    COutPoint outpoint;
-    CTxOut txout;
-    CAmount effective_value;
-    CAmount fee = 0;
-    CAmount long_term_fee = 0;
-
-    bool operator<(const CInputCoin& rhs) const {
-        return outpoint < rhs.outpoint;
-    }
-
-    bool operator!=(const CInputCoin& rhs) const {
-        return outpoint != rhs.outpoint;
-    }
-
-    bool operator==(const CInputCoin& rhs) const {
-        return outpoint == rhs.outpoint;
-    }
-};
-
 class COutput
 {
 public: