From 0bf6f302626497184a26b88c61fe6af1741e2a44 Mon Sep 17 00:00:00 2001
From: Pedro Branco <branco@uphold.com>
Date: Tue, 8 Mar 2016 10:37:18 +0000
Subject: [PATCH] Prevent multiple calls to ExtractDestination

---
 src/wallet/rpcwallet.cpp | 41 +++++++++++++++++++---------------------
 1 file changed, 19 insertions(+), 22 deletions(-)

diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index 623037e766..8da749f525 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -2341,13 +2341,14 @@ UniValue listunspent(const UniValue& params, bool fHelp)
             "\nResult\n"
             "[                   (array of json object)\n"
             "  {\n"
-            "    \"txid\" : \"txid\",        (string) the transaction id \n"
+            "    \"txid\" : \"txid\",          (string) the transaction id \n"
             "    \"vout\" : n,               (numeric) the vout value\n"
-            "    \"address\" : \"address\",  (string) the bitcoin address\n"
-            "    \"account\" : \"account\",  (string) DEPRECATED. The associated account, or \"\" for the default account\n"
-            "    \"scriptPubKey\" : \"key\", (string) the script key\n"
+            "    \"address\" : \"address\",    (string) the bitcoin address\n"
+            "    \"account\" : \"account\",    (string) DEPRECATED. The associated account, or \"\" for the default account\n"
+            "    \"scriptPubKey\" : \"key\",   (string) the script key\n"
             "    \"amount\" : x.xxx,         (numeric) the transaction amount in " + CURRENCY_UNIT + "\n"
             "    \"confirmations\" : n,      (numeric) The number of confirmations\n"
+            "    \"redeemScript\" : n        (string) The redeemScript if scriptPubKey is P2SH\n"
             "    \"spendable\" : xxx,        (bool) Whether we have the private keys to spend this output\n"
             "    \"solvable\" : xxx          (bool) Whether we know how to spend this output, ignoring the lack of keys\n"
             "  }\n"
@@ -2393,38 +2394,34 @@ UniValue listunspent(const UniValue& params, bool fHelp)
         if (out.nDepth < nMinDepth || out.nDepth > nMaxDepth)
             continue;
 
-        if (setAddress.size()) {
-            CTxDestination address;
-            if (!ExtractDestination(out.tx->vout[out.i].scriptPubKey, address))
-                continue;
+        CTxDestination address;
+        const CScript& scriptPubKey = out.tx->vout[out.i].scriptPubKey;
+        bool fValidAddress = ExtractDestination(scriptPubKey, address);
 
-            if (!setAddress.count(address))
-                continue;
-        }
+        if (setAddress.size() && (!fValidAddress || !setAddress.count(address)))
+            continue;
 
-        CAmount nValue = out.tx->vout[out.i].nValue;
-        const CScript& pk = out.tx->vout[out.i].scriptPubKey;
         UniValue entry(UniValue::VOBJ);
         entry.push_back(Pair("txid", out.tx->GetHash().GetHex()));
         entry.push_back(Pair("vout", out.i));
-        CTxDestination address;
-        if (ExtractDestination(out.tx->vout[out.i].scriptPubKey, address)) {
+
+        if (fValidAddress) {
             entry.push_back(Pair("address", CBitcoinAddress(address).ToString()));
+
             if (pwalletMain->mapAddressBook.count(address))
                 entry.push_back(Pair("account", pwalletMain->mapAddressBook[address].name));
-        }
-        entry.push_back(Pair("scriptPubKey", HexStr(pk.begin(), pk.end())));
-        if (pk.IsPayToScriptHash()) {
-            CTxDestination address;
-            if (ExtractDestination(pk, address)) {
+
+            if (scriptPubKey.IsPayToScriptHash()) {
                 const CScriptID& hash = boost::get<CScriptID>(address);
                 CScript redeemScript;
                 if (pwalletMain->GetCScript(hash, redeemScript))
                     entry.push_back(Pair("redeemScript", HexStr(redeemScript.begin(), redeemScript.end())));
             }
         }
-        entry.push_back(Pair("amount",ValueFromAmount(nValue)));
-        entry.push_back(Pair("confirmations",out.nDepth));
+
+        entry.push_back(Pair("scriptPubKey", HexStr(scriptPubKey.begin(), scriptPubKey.end())));
+        entry.push_back(Pair("amount", ValueFromAmount(out.tx->vout[out.i].nValue)));
+        entry.push_back(Pair("confirmations", out.nDepth));
         entry.push_back(Pair("spendable", out.fSpendable));
         entry.push_back(Pair("solvable", out.fSolvable));
         results.push_back(entry);