From f2d0944eb372838e05c666ce9b3df119d7da5594 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jo=C3=A3o=20Barbosa?= <joao@uphold.com>
Date: Wed, 6 Apr 2016 15:56:14 +0100
Subject: [PATCH] Add lockUnspents option to fundrawtransaction

---
 src/wallet/rpcwallet.cpp |  9 +++++++--
 src/wallet/wallet.cpp    | 10 +++++++++-
 src/wallet/wallet.h      |  6 +++---
 3 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index 5cd57fc38..3078cebd4 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -2453,6 +2453,7 @@ UniValue fundrawtransaction(const UniValue& params, bool fHelp)
                             "     \"changeAddress\"     (string, optional, default pool address) The bitcoin address to receive the change\n"
                             "     \"changePosition\"    (numeric, optional, default random) The index of the change output\n"
                             "     \"includeWatching\"   (boolean, optional, default false) Also select inputs which are watch only\n"
+                            "     \"lockUnspents\"      (boolean, optional, default false) Lock selected unspent outputs\n"
                             "   }\n"
                             "                         for backward compatibility: passing in a true instzead of an object will result in {\"includeWatching\":true}\n"
                             "\nResult:\n"
@@ -2478,6 +2479,7 @@ UniValue fundrawtransaction(const UniValue& params, bool fHelp)
     CTxDestination changeAddress = CNoDestination();
     int changePosition = -1;
     bool includeWatching = false;
+    bool lockUnspents = false;
 
     if (params.size() > 1) {
       if (params[1].type() == UniValue::VBOOL) {
@@ -2489,7 +2491,7 @@ UniValue fundrawtransaction(const UniValue& params, bool fHelp)
 
         UniValue options = params[1];
 
-        RPCTypeCheckObj(options, boost::assign::map_list_of("changeAddress", UniValue::VSTR)("changePosition", UniValue::VNUM)("includeWatching", UniValue::VBOOL), true, true);
+        RPCTypeCheckObj(options, boost::assign::map_list_of("changeAddress", UniValue::VSTR)("changePosition", UniValue::VNUM)("includeWatching", UniValue::VBOOL)("lockUnspents", UniValue::VBOOL), true, true);
 
         if (options.exists("changeAddress")) {
             CBitcoinAddress address(options["changeAddress"].get_str());
@@ -2505,6 +2507,9 @@ UniValue fundrawtransaction(const UniValue& params, bool fHelp)
 
         if (options.exists("includeWatching"))
             includeWatching = options["includeWatching"].get_bool();
+
+        if (options.exists("lockUnspents"))
+            lockUnspents = options["lockUnspents"].get_bool();
       }
     }
 
@@ -2523,7 +2528,7 @@ UniValue fundrawtransaction(const UniValue& params, bool fHelp)
     CAmount nFee;
     string strFailReason;
 
-    if(!pwalletMain->FundTransaction(tx, nFee, changePosition, strFailReason, includeWatching, changeAddress))
+    if(!pwalletMain->FundTransaction(tx, nFee, changePosition, strFailReason, includeWatching, lockUnspents, changeAddress))
         throw JSONRPCError(RPC_INTERNAL_ERROR, strFailReason);
 
     UniValue result(UniValue::VOBJ);
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index ee9255216..8161c659a 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -1932,7 +1932,7 @@ bool CWallet::SelectCoins(const vector<COutput>& vAvailableCoins, const CAmount&
     return res;
 }
 
-bool CWallet::FundTransaction(CMutableTransaction& tx, CAmount& nFeeRet, int& nChangePosInOut, std::string& strFailReason, bool includeWatching, const CTxDestination& destChange)
+bool CWallet::FundTransaction(CMutableTransaction& tx, CAmount& nFeeRet, int& nChangePosInOut, std::string& strFailReason, bool includeWatching, bool lockUnspents, const CTxDestination& destChange)
 {
     vector<CRecipient> vecSend;
 
@@ -1962,7 +1962,15 @@ bool CWallet::FundTransaction(CMutableTransaction& tx, CAmount& nFeeRet, int& nC
     BOOST_FOREACH(const CTxIn& txin, wtx.vin)
     {
         if (!coinControl.IsSelected(txin.prevout))
+        {
             tx.vin.push_back(txin);
+
+            if (lockUnspents)
+            {
+              LOCK2(cs_main, cs_wallet);
+              LockCoin(txin.prevout);
+            }
+        }
     }
 
     return true;
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
index b0781e917..aab4b217c 100644
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -667,8 +667,8 @@ public:
     bool IsSpent(const uint256& hash, unsigned int n) const;
 
     bool IsLockedCoin(uint256 hash, unsigned int n) const;
-    void LockCoin(COutPoint& output);
-    void UnlockCoin(COutPoint& output);
+    void LockCoin(const COutPoint& output);
+    void UnlockCoin(const COutPoint& output);
     void UnlockAllCoins();
     void ListLockedCoins(std::vector<COutPoint>& vOutpts);
 
@@ -739,7 +739,7 @@ public:
      * Insert additional inputs into the transaction by
      * calling CreateTransaction();
      */
-    bool FundTransaction(CMutableTransaction& tx, CAmount& nFeeRet, int& nChangePosInOut, std::string& strFailReason, bool includeWatching, const CTxDestination& destChange = CNoDestination());
+    bool FundTransaction(CMutableTransaction& tx, CAmount& nFeeRet, int& nChangePosInOut, std::string& strFailReason, bool includeWatching, bool lockUnspents, const CTxDestination& destChange = CNoDestination());
 
     /**
      * Create a new transaction paying the recipients with a set of coins