76 files changed, 1491 insertions, 409 deletions
diff --git a/src/Makefile.test.include b/src/Makefile.test.include
index f9384a09a4..fc4e047c35 100644
--- a/src/Makefile.test.include
+++ b/src/Makefile.test.include
@@ -15,6 +15,8 @@ EXTRA_DIST += \
 	test/data/tx394b54bb.hex \
 	test/data/txcreate1.hex \
 	test/data/txcreate2.hex \
+	test/data/txcreatedata1.hex \
+	test/data/txcreatedata2.hex \
 	test/data/txcreatesign.hex
 
 JSON_TEST_FILES = \
@@ -50,6 +52,7 @@ BITCOIN_TESTS =\
   test/getarg_tests.cpp \
   test/hash_tests.cpp \
   test/key_tests.cpp \
+  test/limitedmap_tests.cpp \
   test/main_tests.cpp \
   test/mempool_tests.cpp \
   test/miner_tests.cpp \
diff --git a/src/bitcoin-tx.cpp b/src/bitcoin-tx.cpp
index e389d51a73..97a073174d 100644
--- a/src/bitcoin-tx.cpp
+++ b/src/bitcoin-tx.cpp
@@ -70,6 +70,7 @@ static bool AppInitRawTx(int argc, char* argv[])
         strUsage += HelpMessageOpt("locktime=N", _("Set TX lock time to N"));
         strUsage += HelpMessageOpt("nversion=N", _("Set TX version to N"));
         strUsage += HelpMessageOpt("outaddr=VALUE:ADDRESS", _("Add address-based output to TX"));
+        strUsage += HelpMessageOpt("outdata=[VALUE:]DATA", _("Add data-based output to TX"));
         strUsage += HelpMessageOpt("outscript=VALUE:SCRIPT", _("Add raw script output to TX"));
         strUsage += HelpMessageOpt("sign=SIGHASH-FLAGS", _("Add zero or more signatures to transaction") + ". " +
             _("This command requires JSON registers:") +
@@ -231,6 +232,35 @@ static void MutateTxAddOutAddr(CMutableTransaction& tx, const string& strInput)
     tx.vout.push_back(txout);
 }
 
+static void MutateTxAddOutData(CMutableTransaction& tx, const string& strInput)
+{
+    CAmount value = 0;
+
+    // separate [VALUE:]DATA in string
+    size_t pos = strInput.find(':');
+
+    if (pos==0)
+        throw runtime_error("TX output value not specified");
+
+    if (pos != string::npos) {
+        // extract and validate VALUE
+        string strValue = strInput.substr(0, pos);
+        if (!ParseMoney(strValue, value))
+            throw runtime_error("invalid TX output value");
+    }
+
+    // extract and validate DATA
+    string strData = strInput.substr(pos + 1, string::npos);
+
+    if (!IsHex(strData))
+        throw runtime_error("invalid TX output data");
+
+    std::vector<unsigned char> data = ParseHex(strData);
+
+    CTxOut txout(value, CScript() << OP_RETURN << data);
+    tx.vout.push_back(txout);
+}
+
 static void MutateTxAddOutScript(CMutableTransaction& tx, const string& strInput)
 {
     // separate VALUE:SCRIPT in string
@@ -470,6 +500,8 @@ static void MutateTx(CMutableTransaction& tx, const string& command,
         MutateTxDelOutput(tx, commandVal);
     else if (command == "outaddr")
         MutateTxAddOutAddr(tx, commandVal);
+    else if (command == "outdata")
+        MutateTxAddOutData(tx, commandVal);
     else if (command == "outscript")
         MutateTxAddOutScript(tx, commandVal);
 
diff --git a/src/coincontrol.h b/src/coincontrol.h
index 3e8de83c39..bc965f9e19 100644
--- a/src/coincontrol.h
+++ b/src/coincontrol.h
@@ -14,6 +14,8 @@ public:
     CTxDestination destChange;
     //! If false, allows unselected inputs, but requires all selected inputs be used
     bool fAllowOtherInputs;
+    //! Includes watch only addresses which match the ISMINE_WATCH_SOLVABLE criteria
+    bool fAllowWatchOnly;
 
     CCoinControl()
     {
@@ -24,6 +26,7 @@ public:
     {
         destChange = CNoDestination();
         fAllowOtherInputs = false;
+        fAllowWatchOnly = false;
         setSelected.clear();
     }
 
diff --git a/src/consensus/validation.h b/src/consensus/validation.h
index 719e090a42..d6051edc38 100644
--- a/src/consensus/validation.h
+++ b/src/consensus/validation.h
@@ -30,14 +30,17 @@ private:
     std::string strRejectReason;
     unsigned int chRejectCode;
     bool corruptionPossible;
+    std::string strDebugMessage;
 public:
     CValidationState() : mode(MODE_VALID), nDoS(0), chRejectCode(0), corruptionPossible(false) {}
     bool DoS(int level, bool ret = false,
-             unsigned int chRejectCodeIn=0, std::string strRejectReasonIn="",
-             bool corruptionIn=false) {
+             unsigned int chRejectCodeIn=0, const std::string &strRejectReasonIn="",
+             bool corruptionIn=false,
+             const std::string &strDebugMessageIn="") {
         chRejectCode = chRejectCodeIn;
         strRejectReason = strRejectReasonIn;
         corruptionPossible = corruptionIn;
+        strDebugMessage = strDebugMessageIn;
         if (mode == MODE_ERROR)
             return ret;
         nDoS += level;
@@ -45,8 +48,9 @@ public:
         return ret;
     }
     bool Invalid(bool ret = false,
-                 unsigned int _chRejectCode=0, std::string _strRejectReason="") {
-        return DoS(0, ret, _chRejectCode, _strRejectReason);
+                 unsigned int _chRejectCode=0, const std::string &_strRejectReason="",
+                 const std::string &_strDebugMessage="") {
+        return DoS(0, ret, _chRejectCode, _strRejectReason, false, _strDebugMessage);
     }
     bool Error(const std::string& strRejectReasonIn) {
         if (mode == MODE_VALID)
@@ -75,6 +79,7 @@ public:
     }
     unsigned int GetRejectCode() const { return chRejectCode; }
     std::string GetRejectReason() const { return strRejectReason; }
+    std::string GetDebugMessage() const { return strDebugMessage; }
 };
 
 #endif // BITCOIN_CONSENSUS_VALIDATION_H
diff --git a/src/init.cpp b/src/init.cpp
index ef1c39db25..085e04fdfd 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -373,7 +373,7 @@ std::string HelpMessage(HelpMessageMode mode)
         strUsage += HelpMessageOpt("-flushwallet", strprintf("Run a thread to flush wallet periodically (default: %u)", 1));
         strUsage += HelpMessageOpt("-stopafterblockimport", strprintf("Stop running after importing blocks from disk (default: %u)", 0));
     }
-    string debugCategories = "addrman, alert, bench, coindb, db, lock, rand, rpc, selectcoins, mempool, net, proxy, prune"; // Don't translate these and qt below
+    string debugCategories = "addrman, alert, bench, coindb, db, lock, rand, rpc, selectcoins, mempool, mempoolrej, net, proxy, prune"; // Don't translate these and qt below
     if (mode == HMM_BITCOIN_QT)
         debugCategories += ", qt";
     strUsage += HelpMessageOpt("-debug=<category>", strprintf(_("Output debugging information (default: %u, supplying <category> is optional)"), 0) + ". " +
diff --git a/src/keystore.cpp b/src/keystore.cpp
index 3bae24b7b9..cf49ba83ad 100644
--- a/src/keystore.cpp
+++ b/src/keystore.cpp
@@ -6,23 +6,30 @@
 #include "keystore.h"
 
 #include "key.h"
+#include "pubkey.h"
 #include "util.h"
 
 #include <boost/foreach.hpp>
 
-bool CKeyStore::GetPubKey(const CKeyID &address, CPubKey &vchPubKeyOut) const
+bool CKeyStore::AddKey(const CKey &key) {
+    return AddKeyPubKey(key, key.GetPubKey());
+}
+
+bool CBasicKeyStore::GetPubKey(const CKeyID &address, CPubKey &vchPubKeyOut) const
 {
     CKey key;
-    if (!GetKey(address, key))
+    if (!GetKey(address, key)) {
+        WatchKeyMap::const_iterator it = mapWatchKeys.find(address);
+        if (it != mapWatchKeys.end()) {
+            vchPubKeyOut = it->second;
+            return true;
+        }
         return false;
+    }
     vchPubKeyOut = key.GetPubKey();
     return true;
 }
 
-bool CKeyStore::AddKey(const CKey &key) {
-    return AddKeyPubKey(key, key.GetPubKey());
-}
-
 bool CBasicKeyStore::AddKeyPubKey(const CKey& key, const CPubKey &pubkey)
 {
     LOCK(cs_KeyStore);
@@ -58,10 +65,29 @@ bool CBasicKeyStore::GetCScript(const CScriptID &hash, CScript& redeemScriptOut)
     return false;
 }
 
+static bool ExtractPubKey(const CScript &dest, CPubKey& pubKeyOut)
+{
+    //TODO: Use Solver to extract this?
+    CScript::const_iterator pc = dest.begin();
+    opcodetype opcode;
+    std::vector<unsigned char> vch;
+    if (!dest.GetOp(pc, opcode, vch) || vch.size() < 33 || vch.size() > 65)
+        return false;
+    pubKeyOut = CPubKey(vch);
+    if (!pubKeyOut.IsFullyValid())
+        return false;
+    if (!dest.GetOp(pc, opcode, vch) || opcode != OP_CHECKSIG || dest.GetOp(pc, opcode, vch))
+        return false;
+    return true;
+}
+
 bool CBasicKeyStore::AddWatchOnly(const CScript &dest)
 {
     LOCK(cs_KeyStore);
     setWatchOnly.insert(dest);
+    CPubKey pubKey;
+    if (ExtractPubKey(dest, pubKey))
+        mapWatchKeys[pubKey.GetID()] = pubKey;
     return true;
 }
 
@@ -69,6 +95,9 @@ bool CBasicKeyStore::RemoveWatchOnly(const CScript &dest)
 {
     LOCK(cs_KeyStore);
     setWatchOnly.erase(dest);
+    CPubKey pubKey;
+    if (ExtractPubKey(dest, pubKey))
+        mapWatchKeys.erase(pubKey.GetID());
     return true;
 }
 
diff --git a/src/keystore.h b/src/keystore.h
index 4a4b6d20af..b917bf20b4 100644
--- a/src/keystore.h
+++ b/src/keystore.h
@@ -32,7 +32,7 @@ public:
     virtual bool HaveKey(const CKeyID &address) const =0;
     virtual bool GetKey(const CKeyID &address, CKey& keyOut) const =0;
     virtual void GetKeys(std::set<CKeyID> &setAddress) const =0;
-    virtual bool GetPubKey(const CKeyID &address, CPubKey& vchPubKeyOut) const;
+    virtual bool GetPubKey(const CKeyID &address, CPubKey& vchPubKeyOut) const =0;
 
     //! Support for BIP 0013 : see https://github.com/bitcoin/bips/blob/master/bip-0013.mediawiki
     virtual bool AddCScript(const CScript& redeemScript) =0;
@@ -47,6 +47,7 @@ public:
 };
 
 typedef std::map<CKeyID, CKey> KeyMap;
+typedef std::map<CKeyID, CPubKey> WatchKeyMap;
 typedef std::map<CScriptID, CScript > ScriptMap;
 typedef std::set<CScript> WatchOnlySet;
 
@@ -55,11 +56,13 @@ class CBasicKeyStore : public CKeyStore
 {
 protected:
     KeyMap mapKeys;
+    WatchKeyMap mapWatchKeys;
     ScriptMap mapScripts;
     WatchOnlySet setWatchOnly;
 
 public:
     bool AddKeyPubKey(const CKey& key, const CPubKey &pubkey);
+    bool GetPubKey(const CKeyID &address, CPubKey& vchPubKeyOut) const;
     bool HaveKey(const CKeyID &address) const
     {
         bool result;
diff --git a/src/leveldbwrapper.cpp b/src/leveldbwrapper.cpp
index c353dfa6d9..26cacf95ae 100644
--- a/src/leveldbwrapper.cpp
+++ b/src/leveldbwrapper.cpp
@@ -58,7 +58,8 @@ CLevelDBWrapper::CLevelDBWrapper(const boost::filesystem::path& path, size_t nCa
     } else {
         if (fWipe) {
             LogPrintf("Wiping LevelDB in %s\n", path.string());
-            leveldb::DestroyDB(path.string(), options);
+            leveldb::Status result = leveldb::DestroyDB(path.string(), options);
+            HandleError(result);
         }
         TryCreateDirectory(path);
         LogPrintf("Opening LevelDB in %s\n", path.string());
diff --git a/src/limitedmap.h b/src/limitedmap.h
index e8ea549653..5456dfc7c4 100644
--- a/src/limitedmap.h
+++ b/src/limitedmap.h
@@ -27,7 +27,11 @@ protected:
     size_type nMaxSize;
 
 public:
-    limitedmap(size_type nMaxSizeIn = 0) { nMaxSize = nMaxSizeIn; }
+    limitedmap(size_type nMaxSizeIn)
+    {
+        assert(nMaxSizeIn > 0);
+        nMaxSize = nMaxSizeIn;
+    }
     const_iterator begin() const { return map.begin(); }
     const_iterator end() const { return map.end(); }
     size_type size() const { return map.size(); }
@@ -38,13 +42,12 @@ public:
     {
         std::pair<iterator, bool> ret = map.insert(x);
         if (ret.second) {
-            if (nMaxSize && map.size() == nMaxSize) {
+            if (map.size() > nMaxSize) {
                 map.erase(rmap.begin()->second);
                 rmap.erase(rmap.begin());
             }
             rmap.insert(make_pair(x.second, ret.first));
         }
-        return;
     }
     void erase(const key_type& k)
     {
@@ -81,11 +84,11 @@ public:
     size_type max_size() const { return nMaxSize; }
     size_type max_size(size_type s)
     {
-        if (s)
-            while (map.size() > s) {
-                map.erase(rmap.begin()->second);
-                rmap.erase(rmap.begin());
-            }
+        assert(s > 0);
+        while (map.size() > s) {
+            map.erase(rmap.begin()->second);
+            rmap.erase(rmap.begin());
+        }
         nMaxSize = s;
         return nMaxSize;
     }
diff --git a/src/main.cpp b/src/main.cpp
index 34e163ff61..33b57a5285 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -696,30 +696,24 @@ bool CheckTransaction(const CTransaction& tx, CValidationState &state)
 {
     // Basic checks that don't depend on any context
     if (tx.vin.empty())
-        return state.DoS(10, error("CheckTransaction(): vin empty"),
-                         REJECT_INVALID, "bad-txns-vin-empty");
+        return state.DoS(10, false, REJECT_INVALID, "bad-txns-vin-empty");
     if (tx.vout.empty())
-        return state.DoS(10, error("CheckTransaction(): vout empty"),
-                         REJECT_INVALID, "bad-txns-vout-empty");
+        return state.DoS(10, false, REJECT_INVALID, "bad-txns-vout-empty");
     // Size limits
     if (::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION) > MAX_BLOCK_SIZE)
-        return state.DoS(100, error("CheckTransaction(): size limits failed"),
-                         REJECT_INVALID, "bad-txns-oversize");
+        return state.DoS(100, false, REJECT_INVALID, "bad-txns-oversize");
 
     // Check for negative or overflow output values
     CAmount nValueOut = 0;
     BOOST_FOREACH(const CTxOut& txout, tx.vout)
     {
         if (txout.nValue < 0)
-            return state.DoS(100, error("CheckTransaction(): txout.nValue negative"),
-                             REJECT_INVALID, "bad-txns-vout-negative");
+            return state.DoS(100, false, REJECT_INVALID, "bad-txns-vout-negative");
         if (txout.nValue > MAX_MONEY)
-            return state.DoS(100, error("CheckTransaction(): txout.nValue too high"),
-                             REJECT_INVALID, "bad-txns-vout-toolarge");
+            return state.DoS(100, false, REJECT_INVALID, "bad-txns-vout-toolarge");
         nValueOut += txout.nValue;
         if (!MoneyRange(nValueOut))
-            return state.DoS(100, error("CheckTransaction(): txout total out of range"),
-                             REJECT_INVALID, "bad-txns-txouttotal-toolarge");
+            return state.DoS(100, false, REJECT_INVALID, "bad-txns-txouttotal-toolarge");
     }
 
     // Check for duplicate inputs
@@ -727,23 +721,20 @@ bool CheckTransaction(const CTransaction& tx, CValidationState &state)
     BOOST_FOREACH(const CTxIn& txin, tx.vin)
     {
         if (vInOutPoints.count(txin.prevout))
-            return state.DoS(100, error("CheckTransaction(): duplicate inputs"),
-                             REJECT_INVALID, "bad-txns-inputs-duplicate");
+            return state.DoS(100, false, REJECT_INVALID, "bad-txns-inputs-duplicate");
         vInOutPoints.insert(txin.prevout);
     }
 
     if (tx.IsCoinBase())
     {
         if (tx.vin[0].scriptSig.size() < 2 || tx.vin[0].scriptSig.size() > 100)
-            return state.DoS(100, error("CheckTransaction(): coinbase script size"),
-                             REJECT_INVALID, "bad-cb-length");
+            return state.DoS(100, false, REJECT_INVALID, "bad-cb-length");
     }
     else
     {
         BOOST_FOREACH(const CTxIn& txin, tx.vin)
             if (txin.prevout.IsNull())
-                return state.DoS(10, error("CheckTransaction(): prevout is null"),
-                                 REJECT_INVALID, "bad-txns-prevout-null");
+                return state.DoS(10, false, REJECT_INVALID, "bad-txns-prevout-null");
     }
 
     return true;
@@ -778,6 +769,14 @@ CAmount GetMinRelayFee(const CTransaction& tx, unsigned int nBytes, bool fAllowF
     return nMinFee;
 }
 
+/** Convert CValidationState to a human-readable message for logging */
+static std::string FormatStateMessage(const CValidationState &state)
+{
+    return strprintf("%s%s (code %i)",
+        state.GetRejectReason(),
+        state.GetDebugMessage().empty() ? "" : ", "+state.GetDebugMessage(),
+        state.GetRejectCode());
+}
 
 bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransaction &tx, bool fLimitFree,
                         bool* pfMissingInputs, bool fRejectAbsurdFee)
@@ -787,31 +786,27 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
         *pfMissingInputs = false;
 
     if (!CheckTransaction(tx, state))
-        return error("AcceptToMemoryPool: CheckTransaction failed");
+        return false;
 
     // Coinbase is only valid in a block, not as a loose transaction
     if (tx.IsCoinBase())
-        return state.DoS(100, error("AcceptToMemoryPool: coinbase as individual tx"),
-                         REJECT_INVALID, "coinbase");
+        return state.DoS(100, false, REJECT_INVALID, "coinbase");
 
     // Rather not work on nonstandard transactions (unless -testnet/-regtest)
     string reason;
     if (fRequireStandard && !IsStandardTx(tx, reason))
-        return state.DoS(0,
-                         error("AcceptToMemoryPool: nonstandard transaction: %s", reason),
-                         REJECT_NONSTANDARD, reason);
+        return state.DoS(0, false, REJECT_NONSTANDARD, reason);
 
     // Only accept nLockTime-using transactions that can be mined in the next
     // block; we don't want our mempool filled up with transactions that can't
     // be mined yet.
     if (!CheckFinalTx(tx))
-        return state.DoS(0, error("AcceptToMemoryPool: non-final"),
-                         REJECT_NONSTANDARD, "non-final");
+        return state.DoS(0, false, REJECT_NONSTANDARD, "non-final");
 
     // is it already in the memory pool?
     uint256 hash = tx.GetHash();
     if (pool.exists(hash))
-        return false;
+        return state.Invalid(false, REJECT_ALREADY_KNOWN, "txn-already-in-mempool");
 
     // Check for conflicts with in-memory transactions
     {
@@ -822,7 +817,7 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
         if (pool.mapNextTx.count(outpoint))
         {
             // Disable replacement feature for now
-            return false;
+            return state.Invalid(false, REJECT_CONFLICT, "txn-mempool-conflict");
         }
     }
     }
@@ -839,7 +834,7 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
 
         // do we already have it?
         if (view.HaveCoins(hash))
-            return false;
+            return state.Invalid(false, REJECT_ALREADY_KNOWN, "txn-already-known");
 
         // do all inputs exist?
         // Note that this does not check for the presence of actual outputs (see the next check for that),
@@ -848,14 +843,13 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
             if (!view.HaveCoins(txin.prevout.hash)) {
                 if (pfMissingInputs)
                     *pfMissingInputs = true;
-                return false;
+                return false; // fMissingInputs and !state.IsInvalid() is used to detect this condition, don't set state.Invalid()
             }
         }
 
         // are the actual inputs available?
         if (!view.HaveInputs(tx))
-            return state.Invalid(error("AcceptToMemoryPool: inputs already spent"),
-                                 REJECT_DUPLICATE, "bad-txns-inputs-spent");
+            return state.Invalid(false, REJECT_DUPLICATE, "bad-txns-inputs-spent");
 
         // Bring the best block into scope
         view.GetBestBlock();
@@ -868,7 +862,7 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
 
         // Check for non-standard pay-to-script-hash in inputs
         if (fRequireStandard && !AreInputsStandard(tx, view))
-            return error("AcceptToMemoryPool: nonstandard transaction input");
+            return state.Invalid(false, REJECT_NONSTANDARD, "bad-txns-nonstandard-inputs");
 
         // Check that the transaction doesn't have an excessive number of
         // sigops, making it impossible to mine. Since the coinbase transaction
@@ -878,10 +872,8 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
         unsigned int nSigOps = GetLegacySigOpCount(tx);
         nSigOps += GetP2SHSigOpCount(tx, view);
         if (nSigOps > MAX_STANDARD_TX_SIGOPS)
-            return state.DoS(0,
-                             error("AcceptToMemoryPool: too many sigops %s, %d > %d",
-                                   hash.ToString(), nSigOps, MAX_STANDARD_TX_SIGOPS),
-                             REJECT_NONSTANDARD, "bad-txns-too-many-sigops");
+            return state.DoS(0, false, REJECT_NONSTANDARD, "bad-txns-too-many-sigops", false,
+                strprintf("%d > %d", nSigOps, MAX_STANDARD_TX_SIGOPS));
 
         CAmount nValueOut = tx.GetValueOut();
         CAmount nFees = nValueIn-nValueOut;
@@ -893,9 +885,8 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
         // Don't accept it if it can't get into a block
         CAmount txMinFee = GetMinRelayFee(tx, nSize, true);
         if (fLimitFree && nFees < txMinFee)
-            return state.DoS(0, error("AcceptToMemoryPool: not enough fees %s, %d < %d",
-                                      hash.ToString(), nFees, txMinFee),
-                             REJECT_INSUFFICIENTFEE, "insufficient fee");
+            return state.DoS(0, false, REJECT_INSUFFICIENTFEE, "insufficient fee", false,
+                strprintf("%d < %d", nFees, txMinFee));
 
         // Require that free transactions have sufficient priority to be mined in the next block.
         if (GetBoolArg("-relaypriority", true) && nFees < ::minRelayTxFee.GetFee(nSize) && !AllowFree(view.GetPriority(tx, chainActive.Height() + 1))) {
@@ -920,24 +911,20 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
             // -limitfreerelay unit is thousand-bytes-per-minute
             // At default rate it would take over a month to fill 1GB
             if (dFreeCount >= GetArg("-limitfreerelay", 15)*10*1000)
-                return state.DoS(0, error("AcceptToMemoryPool: free transaction rejected by rate limiter"),
-                                 REJECT_INSUFFICIENTFEE, "rate limited free transaction");
+                return state.DoS(0, false, REJECT_INSUFFICIENTFEE, "rate limited free transaction");
             LogPrint("mempool", "Rate limit dFreeCount: %g => %g\n", dFreeCount, dFreeCount+nSize);
             dFreeCount += nSize;
         }
 
         if (fRejectAbsurdFee && nFees > ::minRelayTxFee.GetFee(nSize) * 10000)
-            return state.Invalid(error("AcceptToMemoryPool: absurdly high fees %s, %d > %d",
-                                       hash.ToString(),
-                                       nFees, ::minRelayTxFee.GetFee(nSize) * 10000),
-                                 REJECT_HIGHFEE, "absurdly-high-fee");
+            return state.Invalid(false,
+                REJECT_HIGHFEE, "absurdly-high-fee",
+                strprintf("%d > %d", nFees, ::minRelayTxFee.GetFee(nSize) * 10000));
 
         // Check against previous transactions
         // This is done last to help prevent CPU exhaustion denial-of-service attacks.
         if (!CheckInputs(tx, state, view, true, STANDARD_SCRIPT_VERIFY_FLAGS, true))
-        {
-            return error("AcceptToMemoryPool: ConnectInputs failed %s", hash.ToString());
-        }
+            return false;
 
         // Check again against just the consensus-critical mandatory script
         // verification flags, in case of bugs in the standard flags that cause
@@ -950,7 +937,8 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
         // can be exploited as a DoS attack.
         if (!CheckInputs(tx, state, view, true, MANDATORY_SCRIPT_VERIFY_FLAGS, true))
         {
-            return error("AcceptToMemoryPool: BUG! PLEASE REPORT THIS! ConnectInputs failed against MANDATORY but not STANDARD flags %s", hash.ToString());
+            return error("%s: BUG! PLEASE REPORT THIS! ConnectInputs failed against MANDATORY but not STANDARD flags %s, %s",
+                __func__, hash.ToString(), FormatStateMessage(state));
         }
 
         // Store transaction in memory
@@ -1035,7 +1023,7 @@ bool GetTransaction(const uint256 &hash, CTransaction &txOut, uint256 &hashBlock
 // CBlock and CBlockIndex
 //
 
-bool WriteBlockToDisk(CBlock& block, CDiskBlockPos& pos, const CMessageHeader::MessageStartChars& messageStart)
+bool WriteBlockToDisk(const CBlock& block, CDiskBlockPos& pos, const CMessageHeader::MessageStartChars& messageStart)
 {
     // Open history file to append
     CAutoFile fileout(OpenBlockFile(pos), SER_DISK, CLIENT_VERSION);
@@ -1228,9 +1216,11 @@ void static InvalidChainFound(CBlockIndex* pindexNew)
       pindexNew->GetBlockHash().ToString(), pindexNew->nHeight,
       log(pindexNew->nChainWork.getdouble())/log(2.0), DateTimeStrFormat("%Y-%m-%d %H:%M:%S",
       pindexNew->GetBlockTime()));
+    CBlockIndex *tip = chainActive.Tip();
+    assert (tip);
     LogPrintf("%s:  current best=%s  height=%d  log2_work=%.8g  date=%s\n", __func__,
-      chainActive.Tip()->GetBlockHash().ToString(), chainActive.Height(), log(chainActive.Tip()->nChainWork.getdouble())/log(2.0),
-      DateTimeStrFormat("%Y-%m-%d %H:%M:%S", chainActive.Tip()->GetBlockTime()));
+      tip->GetBlockHash().ToString(), chainActive.Height(), log(tip->nChainWork.getdouble())/log(2.0),
+      DateTimeStrFormat("%Y-%m-%d %H:%M:%S", tip->GetBlockTime()));
     CheckForkWarningConditions();
 }
 
@@ -1239,7 +1229,7 @@ void static InvalidBlockFound(CBlockIndex *pindex, const CValidationState &state
     if (state.IsInvalid(nDoS)) {
         std::map<uint256, NodeId>::iterator it = mapBlockSource.find(pindex->GetBlockHash());
         if (it != mapBlockSource.end() && State(it->second)) {
-            assert(state.GetRejectCode() < 0x100);
+            assert (state.GetRejectCode() < REJECT_INTERNAL); // Blocks are never rejected with internal reject codes
             CBlockReject reject = {(unsigned char)state.GetRejectCode(), state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), pindex->GetBlockHash()};
             State(it->second)->rejects.push_back(reject);
             if (nDoS > 0)
@@ -1290,7 +1280,7 @@ void UpdateCoins(const CTransaction& tx, CValidationState &state, CCoinsViewCach
 bool CScriptCheck::operator()() {
     const CScript &scriptSig = ptxTo->vin[nIn].scriptSig;
     if (!VerifyScript(scriptSig, scriptPubKey, nFlags, CachingTransactionSignatureChecker(ptxTo, nIn, cacheStore), &error)) {
-        return ::error("CScriptCheck(): %s:%d VerifySignature failed: %s", ptxTo->GetHash().ToString(), nIn, ScriptErrorString(error));
+        return false;
     }
     return true;
 }
@@ -1308,7 +1298,7 @@ bool CheckTxInputs(const CTransaction& tx, CValidationState& state, const CCoins
         // This doesn't trigger the DoS code on purpose; if it did, it would make it easier
         // for an attacker to attempt to split the network.
         if (!inputs.HaveInputs(tx))
-            return state.Invalid(error("CheckInputs(): %s inputs unavailable", tx.GetHash().ToString()));
+            return state.Invalid(false, 0, "", "Inputs unavailable");
 
         CAmount nValueIn = 0;
         CAmount nFees = 0;
@@ -1321,33 +1311,29 @@ bool CheckTxInputs(const CTransaction& tx, CValidationState& state, const CCoins
             // If prev is coinbase, check that it's matured
             if (coins->IsCoinBase()) {
                 if (nSpendHeight - coins->nHeight < COINBASE_MATURITY)
-                    return state.Invalid(
-                        error("CheckInputs(): tried to spend coinbase at depth %d", nSpendHeight - coins->nHeight),
-                        REJECT_INVALID, "bad-txns-premature-spend-of-coinbase");
+                    return state.Invalid(false,
+                        REJECT_INVALID, "bad-txns-premature-spend-of-coinbase",
+                        strprintf("tried to spend coinbase at depth %d", nSpendHeight - coins->nHeight));
             }
 
             // Check for negative or overflow input values
             nValueIn += coins->vout[prevout.n].nValue;
             if (!MoneyRange(coins->vout[prevout.n].nValue) || !MoneyRange(nValueIn))
-                return state.DoS(100, error("CheckInputs(): txin values out of range"),
-                                 REJECT_INVALID, "bad-txns-inputvalues-outofrange");
+                return state.DoS(100, false, REJECT_INVALID, "bad-txns-inputvalues-outofrange");
 
         }
 
         if (nValueIn < tx.GetValueOut())
-            return state.DoS(100, error("CheckInputs(): %s value in (%s) < value out (%s)",
-                                        tx.GetHash().ToString(), FormatMoney(nValueIn), FormatMoney(tx.GetValueOut())),
-                             REJECT_INVALID, "bad-txns-in-belowout");
+            return state.DoS(100, false, REJECT_INVALID, "bad-txns-in-belowout", false,
+                strprintf("value in (%s) < value out (%s)", FormatMoney(nValueIn), FormatMoney(tx.GetValueOut())));
 
         // Tally transaction fees
         CAmount nTxFee = nValueIn - tx.GetValueOut();
         if (nTxFee < 0)
-            return state.DoS(100, error("CheckInputs(): %s nTxFee < 0", tx.GetHash().ToString()),
-                             REJECT_INVALID, "bad-txns-fee-negative");
+            return state.DoS(100, false, REJECT_INVALID, "bad-txns-fee-negative");
         nFees += nTxFee;
         if (!MoneyRange(nFees))
-            return state.DoS(100, error("CheckInputs(): nFees out of range"),
-                             REJECT_INVALID, "bad-txns-fee-outofrange");
+            return state.DoS(100, false, REJECT_INVALID, "bad-txns-fee-outofrange");
     return true;
 }
 }// namespace Consensus
@@ -1518,7 +1504,7 @@ static bool ApplyTxInUndo(const CTxInUndo& undo, CCoinsViewCache& view, const CO
     return fClean;
 }
 
-bool DisconnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex, CCoinsViewCache& view, bool* pfClean)
+bool DisconnectBlock(const CBlock& block, CValidationState& state, const CBlockIndex* pindex, CCoinsViewCache& view, bool* pfClean)
 {
     assert(pindex->GetBlockHash() == view.GetBestBlock());
 
@@ -1793,7 +1779,8 @@ bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pin
 
             std::vector<CScriptCheck> vChecks;
             if (!CheckInputs(tx, state, view, fScriptChecks, flags, false, nScriptCheckThreads ? &vChecks : NULL))
-                return false;
+                return error("ConnectBlock(): CheckInputs on %s failed with %s",
+                    tx.GetHash().ToString(), FormatStateMessage(state));
             control.Add(vChecks);
         }
 
@@ -2075,7 +2062,7 @@ static int64_t nTimePostConnect = 0;
  * Connect a new block to chainActive. pblock is either NULL or a pointer to a CBlock
  * corresponding to pindexNew, to bypass loading it again from disk.
  */
-bool static ConnectTip(CValidationState &state, CBlockIndex *pindexNew, CBlock *pblock) {
+bool static ConnectTip(CValidationState &state, CBlockIndex *pindexNew, const CBlock *pblock) {
     assert(pindexNew->pprev == chainActive.Tip());
     mempool.check(pcoinsTip);
     // Read block from disk.
@@ -2207,7 +2194,7 @@ static void PruneBlockIndexCandidates() {
  * Try to make some progress towards making pindexMostWork the active block.
  * pblock is either NULL or a pointer to a CBlock corresponding to pindexMostWork.
  */
-static bool ActivateBestChainStep(CValidationState &state, CBlockIndex *pindexMostWork, CBlock *pblock) {
+static bool ActivateBestChainStep(CValidationState &state, CBlockIndex *pindexMostWork, const CBlock *pblock) {
     AssertLockHeld(cs_main);
     bool fInvalidFound = false;
     const CBlockIndex *pindexOldTip = chainActive.Tip();
@@ -2276,7 +2263,7 @@ static bool ActivateBestChainStep(CValidationState &state, CBlockIndex *pindexMo
  * or an activated best chain. pblock is either NULL or a pointer to a block
  * that is already loaded (to avoid loading it again from disk).
  */
-bool ActivateBestChain(CValidationState &state, CBlock *pblock) {
+bool ActivateBestChain(CValidationState &state, const CBlock *pblock) {
     CBlockIndex *pindexNewTip = NULL;
     CBlockIndex *pindexMostWork = NULL;
     const CChainParams& chainParams = Params();
@@ -2620,7 +2607,9 @@ bool CheckBlock(const CBlock& block, CValidationState& state, bool fCheckPOW, bo
     // Check transactions
     BOOST_FOREACH(const CTransaction& tx, block.vtx)
         if (!CheckTransaction(tx, state))
-            return error("CheckBlock(): CheckTransaction failed");
+            return error("CheckBlock(): CheckTransaction of %s failed with %s",
+                tx.GetHash().ToString(),
+                FormatStateMessage(state));
 
     unsigned int nSigOps = 0;
     BOOST_FOREACH(const CTransaction& tx, block.vtx)
@@ -2747,7 +2736,7 @@ bool AcceptBlockHeader(const CBlockHeader& block, CValidationState& state, CBloc
     return true;
 }
 
-bool AcceptBlock(CBlock& block, CValidationState& state, CBlockIndex** ppindex, bool fRequested, CDiskBlockPos* dbp)
+bool AcceptBlock(const CBlock& block, CValidationState& state, CBlockIndex** ppindex, bool fRequested, CDiskBlockPos* dbp)
 {
     const CChainParams& chainparams = Params();
     AssertLockHeld(cs_main);
@@ -2824,7 +2813,7 @@ static bool IsSuperMajority(int minVersion, const CBlockIndex* pstart, unsigned
 }
 
 
-bool ProcessNewBlock(CValidationState &state, CNode* pfrom, CBlock* pblock, bool fForceProcessing, CDiskBlockPos *dbp)
+bool ProcessNewBlock(CValidationState &state, const CNode* pfrom, const CBlock* pblock, bool fForceProcessing, CDiskBlockPos *dbp)
 {
     // Preliminary checks
     bool checked = CheckBlock(*pblock, state);
@@ -4355,11 +4344,12 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
         int nDoS = 0;
         if (state.IsInvalid(nDoS))
         {
-            LogPrint("mempool", "%s from peer=%d %s was not accepted into the memory pool: %s\n", tx.GetHash().ToString(),
+            LogPrint("mempoolrej", "%s from peer=%d %s was not accepted into the memory pool: %s\n", tx.GetHash().ToString(),
                 pfrom->id, pfrom->cleanSubVer,
-                state.GetRejectReason());
-            pfrom->PushMessage("reject", strCommand, state.GetRejectCode(),
-                               state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), inv.hash);
+                FormatStateMessage(state));
+            if (state.GetRejectCode() < REJECT_INTERNAL) // Never send AcceptToMemoryPool's internal codes over P2P
+                pfrom->PushMessage("reject", strCommand, state.GetRejectCode(),
+                                   state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), inv.hash);
             if (nDoS > 0)
                 Misbehaving(pfrom->GetId(), nDoS);
         }
@@ -4439,6 +4429,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
         ProcessNewBlock(state, pfrom, &block, forceProcessing, NULL);
         int nDoS;
         if (state.IsInvalid(nDoS)) {
+            assert (state.GetRejectCode() < REJECT_INTERNAL); // Blocks are never rejected with internal reject codes
             pfrom->PushMessage("reject", strCommand, state.GetRejectCode(),
                                state.GetRejectReason().substr(0, MAX_REJECT_MESSAGE_LENGTH), inv.hash);
             if (nDoS > 0) {
diff --git a/src/main.h b/src/main.h
index eec7e6fa59..e3479b4b3b 100644
--- a/src/main.h
+++ b/src/main.h
@@ -142,7 +142,7 @@ void UnregisterNodeSignals(CNodeSignals& nodeSignals);
  * @param[out]  dbp     If pblock is stored to disk (or already there), this will be set to its location.
  * @return True if state.IsValid()
  */
-bool ProcessNewBlock(CValidationState &state, CNode* pfrom, CBlock* pblock, bool fForceProcessing, CDiskBlockPos *dbp);
+bool ProcessNewBlock(CValidationState &state, const CNode* pfrom, const CBlock* pblock, bool fForceProcessing, CDiskBlockPos *dbp);
 /** Check whether enough disk space is available for an incoming block */
 bool CheckDiskSpace(uint64_t nAdditionalBytes = 0);
 /** Open a block file (blk?????.dat) */
@@ -179,7 +179,7 @@ std::string GetWarnings(const std::string& strFor);
 /** Retrieve a transaction (from memory pool, or from disk, if possible) */
 bool GetTransaction(const uint256 &hash, CTransaction &tx, uint256 &hashBlock, bool fAllowSlow = false);
 /** Find the best known block, and make it the tip of the block chain */
-bool ActivateBestChain(CValidationState &state, CBlock *pblock = NULL);
+bool ActivateBestChain(CValidationState &state, const CBlock *pblock = NULL);
 CAmount GetBlockSubsidy(int nHeight, const Consensus::Params& consensusParams);
 
 /**
@@ -335,7 +335,7 @@ public:
 
 
 /** Functions for disk access for blocks */
-bool WriteBlockToDisk(CBlock& block, CDiskBlockPos& pos, const CMessageHeader::MessageStartChars& messageStart);
+bool WriteBlockToDisk(const CBlock& block, CDiskBlockPos& pos, const CMessageHeader::MessageStartChars& messageStart);
 bool ReadBlockFromDisk(CBlock& block, const CDiskBlockPos& pos);
 bool ReadBlockFromDisk(CBlock& block, const CBlockIndex* pindex);
 
@@ -346,7 +346,7 @@ bool ReadBlockFromDisk(CBlock& block, const CBlockIndex* pindex);
  *  In case pfClean is provided, operation will try to be tolerant about errors, and *pfClean
  *  will be true if no problems were found. Otherwise, the return value will be false in case
  *  of problems. Note that in any case, coins may be modified. */
-bool DisconnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex, CCoinsViewCache& coins, bool* pfClean = NULL);
+bool DisconnectBlock(const CBlock& block, CValidationState& state, const CBlockIndex* pindex, CCoinsViewCache& coins, bool* pfClean = NULL);
 
 /** Apply the effects of this block (with given index) on the UTXO set represented by coins */
 bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pindex, CCoinsViewCache& coins, bool fJustCheck = false);
@@ -363,7 +363,7 @@ bool ContextualCheckBlock(const CBlock& block, CValidationState& state, CBlockIn
 bool TestBlockValidity(CValidationState &state, const CBlock& block, CBlockIndex *pindexPrev, bool fCheckPOW = true, bool fCheckMerkleRoot = true);
 
 /** Store block on disk. If dbp is non-NULL, the file is known to already reside on disk */
-bool AcceptBlock(CBlock& block, CValidationState& state, CBlockIndex **pindex, bool fRequested, CDiskBlockPos* dbp);
+bool AcceptBlock(const CBlock& block, CValidationState& state, CBlockIndex **pindex, bool fRequested, CDiskBlockPos* dbp);
 bool AcceptBlockHeader(const CBlockHeader& block, CValidationState& state, CBlockIndex **ppindex= NULL);
 
 
@@ -455,7 +455,16 @@ extern CBlockTreeDB *pblocktree;
  */
 int GetSpendHeight(const CCoinsViewCache& inputs);
 
-/** local "reject" message codes for RPC which can not be triggered by p2p trasactions */
+/** Reject codes greater or equal to this can be returned by AcceptToMemPool
+ * for transactions, to signal internal conditions. They cannot and should not
+ * be sent over the P2P network.
+ */
+static const unsigned int REJECT_INTERNAL = 0x100;
+/** Too high fee. Can not be triggered by P2P transactions */
 static const unsigned int REJECT_HIGHFEE = 0x100;
+/** Transaction is already known (either in mempool or blockchain) */
+static const unsigned int REJECT_ALREADY_KNOWN = 0x101;
+/** Transaction conflicts with a transaction already known */
+static const unsigned int REJECT_CONFLICT = 0x102;
 
 #endif // BITCOIN_MAIN_H
diff --git a/src/miner.cpp b/src/miner.cpp
index 864e4bf31f..9dd1d459b5 100644
--- a/src/miner.cpp
+++ b/src/miner.cpp
@@ -352,7 +352,7 @@ CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn)
     return pblocktemplate.release();
 }
 
-void IncrementExtraNonce(CBlock* pblock, CBlockIndex* pindexPrev, unsigned int& nExtraNonce)
+void IncrementExtraNonce(CBlock* pblock, const CBlockIndex* pindexPrev, unsigned int& nExtraNonce)
 {
     // Update nExtraNonce
     static uint256 hashPrevBlock;
@@ -409,7 +409,7 @@ bool static ScanHash(const CBlockHeader *pblock, uint32_t& nNonce, uint256 *phas
     }
 }
 
-static bool ProcessBlockFound(CBlock* pblock, const CChainParams& chainparams)
+static bool ProcessBlockFound(const CBlock* pblock, const CChainParams& chainparams)
 {
     LogPrintf("%s\n", pblock->ToString());
     LogPrintf("generated %s\n", FormatMoney(pblock->vtx[0].vout[0].nValue));
@@ -444,8 +444,10 @@ void static BitcoinMiner(const CChainParams& chainparams)
     GetMainSignals().ScriptForMining(coinbaseScript);
 
     try {
-        //throw an error if no script was provided
-        if (!coinbaseScript->reserveScript.size())
+        // Throw an error if no script was provided.  This can happen
+        // due to some internal error but also if the keypool is empty.
+        // In the latter case, already the pointer is NULL.
+        if (!coinbaseScript || coinbaseScript->reserveScript.empty())
             throw std::runtime_error("No coinbase script available (mining requires a wallet)");
 
         while (true) {
diff --git a/src/miner.h b/src/miner.h
index d690e9447d..7e0e58d540 100644
--- a/src/miner.h
+++ b/src/miner.h
@@ -29,7 +29,7 @@ void GenerateBitcoins(bool fGenerate, int nThreads, const CChainParams& chainpar
 /** Generate a new block, without valid proof-of-work */
 CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn);
 /** Modify the extranonce in a block */
-void IncrementExtraNonce(CBlock* pblock, CBlockIndex* pindexPrev, unsigned int& nExtraNonce);
+void IncrementExtraNonce(CBlock* pblock, const CBlockIndex* pindexPrev, unsigned int& nExtraNonce);
 int64_t UpdateTime(CBlockHeader* pblock, const Consensus::Params& consensusParams, const CBlockIndex* pindexPrev);
 
 #endif // BITCOIN_MINER_H
diff --git a/src/qt/clientmodel.cpp b/src/qt/clientmodel.cpp
index 41dc2ea77e..97d6711560 100644
--- a/src/qt/clientmodel.cpp
+++ b/src/qt/clientmodel.cpp
@@ -181,6 +181,11 @@ QString ClientModel::formatFullVersion() const
     return QString::fromStdString(FormatFullVersion());
 }
 
+QString ClientModel::formatSubVersion() const
+{
+    return QString::fromStdString(strSubVersion);
+}
+
 QString ClientModel::formatBuildDate() const
 {
     return QString::fromStdString(CLIENT_DATE);
diff --git a/src/qt/clientmodel.h b/src/qt/clientmodel.h
index 68434f404c..ca2da3dde0 100644
--- a/src/qt/clientmodel.h
+++ b/src/qt/clientmodel.h
@@ -63,6 +63,7 @@ public:
     QString getStatusBarWarnings() const;
 
     QString formatFullVersion() const;
+    QString formatSubVersion() const;
     QString formatBuildDate() const;
     bool isReleaseVersion() const;
     QString clientName() const;
diff --git a/src/qt/forms/optionsdialog.ui b/src/qt/forms/optionsdialog.ui
index 55c4f5ac58..22c67b8040 100644
--- a/src/qt/forms/optionsdialog.ui
+++ b/src/qt/forms/optionsdialog.ui
@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>560</width>
-    <height>400</height>
+    <height>440</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -298,6 +298,193 @@
         </layout>
        </item>
        <item>
+        <layout class="QHBoxLayout" name="horizontalLayout_2_Network">
+         <item>
+          <widget class="QLabel" name="proxyActiveNets">
+           <property name="text">
+            <string>Used for reaching peers via:</string>
+           </property>
+           <property name="textFormat">
+            <enum>Qt::PlainText</enum>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QCheckBox" name="proxyReachIPv4">
+           <property name="enabled">
+            <bool>false</bool>
+           </property>
+           <property name="toolTip">
+            <string>Shows, if the supplied default SOCKS5 proxy is used to reach peers via this network type.</string>
+           </property>
+           <property name="text">
+            <string/>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLabel" name="proxyReachIPv4Label">
+           <property name="text">
+            <string>IPv4</string>
+           </property>
+           <property name="textFormat">
+            <enum>Qt::PlainText</enum>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QCheckBox" name="proxyReachIPv6">
+           <property name="enabled">
+            <bool>false</bool>
+           </property>
+           <property name="toolTip">
+            <string>Shows, if the supplied default SOCKS5 proxy is used to reach peers via this network type.</string>
+           </property>
+           <property name="text">
+            <string/>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLabel" name="proxyReachIPv6Label">
+           <property name="text">
+            <string>IPv6</string>
+           </property>
+           <property name="textFormat">
+            <enum>Qt::PlainText</enum>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QCheckBox" name="proxyReachTor">
+           <property name="enabled">
+            <bool>false</bool>
+           </property>
+           <property name="toolTip">
+            <string>Shows, if the supplied default SOCKS5 proxy is used to reach peers via this network type.</string>
+           </property>
+           <property name="text">
+            <string/>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLabel" name="proxyReachTorLabel">
+           <property name="text">
+            <string>Tor</string>
+           </property>
+           <property name="textFormat">
+            <enum>Qt::PlainText</enum>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <spacer name="horizontalSpacer_2_Network">
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>40</width>
+             <height>20</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+        </layout>
+       </item>
+       <item>
+        <widget class="QCheckBox" name="connectSocksTor">
+         <property name="toolTip">
+          <string>Connect to the Bitcoin network through a separate SOCKS5 proxy for Tor hidden services.</string>
+         </property>
+         <property name="text">
+          <string>Use separate SOCKS5 proxy to reach peers via Tor hidden services:</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <layout class="QHBoxLayout" name="horizontalLayout_3_Network">
+         <item>
+          <widget class="QLabel" name="proxyIpTorLabel">
+           <property name="text">
+            <string>Proxy &amp;IP:</string>
+           </property>
+           <property name="textFormat">
+            <enum>Qt::PlainText</enum>
+           </property>
+           <property name="buddy">
+            <cstring>proxyIpTor</cstring>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QValidatedLineEdit" name="proxyIpTor">
+           <property name="minimumSize">
+            <size>
+             <width>140</width>
+             <height>0</height>
+            </size>
+           </property>
+           <property name="maximumSize">
+            <size>
+             <width>140</width>
+             <height>16777215</height>
+            </size>
+           </property>
+           <property name="toolTip">
+            <string>IP address of the proxy (e.g. IPv4: 127.0.0.1 / IPv6: ::1)</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLabel" name="proxyPortTorLabel">
+           <property name="text">
+            <string>&amp;Port:</string>
+           </property>
+           <property name="textFormat">
+            <enum>Qt::PlainText</enum>
+           </property>
+           <property name="buddy">
+            <cstring>proxyPortTor</cstring>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLineEdit" name="proxyPortTor">
+           <property name="minimumSize">
+            <size>
+             <width>55</width>
+             <height>0</height>
+            </size>
+           </property>
+           <property name="maximumSize">
+            <size>
+             <width>55</width>
+             <height>16777215</height>
+            </size>
+           </property>
+           <property name="toolTip">
+            <string>Port of the proxy (e.g. 9050)</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <spacer name="horizontalSpacer_4_Network">
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>40</width>
+             <height>20</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+        </layout>
+       </item>
+       <item>
         <spacer name="verticalSpacer_Network">
          <property name="orientation">
           <enum>Qt::Vertical</enum>
diff --git a/src/qt/forms/rpcconsole.ui b/src/qt/forms/rpcconsole.ui
index 7ae8237476..e8d9a958ad 100644
--- a/src/qt/forms/rpcconsole.ui
+++ b/src/qt/forms/rpcconsole.ui
@@ -87,6 +87,32 @@
         </widget>
        </item>
        <item row="3" column="0">
+        <widget class="QLabel" name="labelClientUserAgent">
+         <property name="text">
+          <string>User Agent</string>
+         </property>
+         <property name="indent">
+          <number>10</number>
+         </property>
+        </widget>
+       </item>
+       <item row="3" column="1">
+        <widget class="QLabel" name="clientUserAgent">
+         <property name="cursor">
+          <cursorShape>IBeamCursor</cursorShape>
+         </property>
+         <property name="text">
+          <string>N/A</string>
+         </property>
+         <property name="textFormat">
+          <enum>Qt::PlainText</enum>
+         </property>
+         <property name="textInteractionFlags">
+          <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
+         </property>
+        </widget>
+       </item>
+       <item row="4" column="0">
         <widget class="QLabel" name="label_14">
          <property name="text">
           <string>Using OpenSSL version</string>
@@ -96,7 +122,7 @@
          </property>
         </widget>
        </item>
-       <item row="3" column="1">
+       <item row="4" column="1">
         <widget class="QLabel" name="openSSLVersion">
          <property name="cursor">
           <cursorShape>IBeamCursor</cursorShape>
@@ -112,7 +138,7 @@
          </property>
         </widget>
        </item>
-       <item row="4" column="0">
+       <item row="5" column="0">
         <widget class="QLabel" name="label_berkeleyDBVersion">
          <property name="text">
           <string>Using BerkeleyDB version</string>
@@ -122,7 +148,7 @@
          </property>
         </widget>
        </item>
-       <item row="4" column="1">
+       <item row="5" column="1">
         <widget class="QLabel" name="berkeleyDBVersion">
          <property name="cursor">
           <cursorShape>IBeamCursor</cursorShape>
@@ -138,14 +164,14 @@
          </property>
         </widget>
        </item>
-       <item row="5" column="0">
+       <item row="6" column="0">
         <widget class="QLabel" name="label_12">
          <property name="text">
           <string>Build date</string>
          </property>
         </widget>
        </item>
-       <item row="5" column="1">
+       <item row="6" column="1">
         <widget class="QLabel" name="buildDate">
          <property name="cursor">
           <cursorShape>IBeamCursor</cursorShape>
@@ -161,14 +187,14 @@
          </property>
         </widget>
        </item>
-       <item row="6" column="0">
+       <item row="7" column="0">
         <widget class="QLabel" name="label_13">
          <property name="text">
           <string>Startup time</string>
          </property>
         </widget>
        </item>
-       <item row="6" column="1">
+       <item row="7" column="1">
         <widget class="QLabel" name="startupTime">
          <property name="cursor">
           <cursorShape>IBeamCursor</cursorShape>
@@ -184,7 +210,7 @@
          </property>
         </widget>
        </item>
-       <item row="7" column="0">
+       <item row="8" column="0">
         <widget class="QLabel" name="label_11">
          <property name="font">
           <font>
@@ -197,14 +223,14 @@
          </property>
         </widget>
        </item>
-       <item row="8" column="0">
+       <item row="9" column="0">
         <widget class="QLabel" name="label_8">
          <property name="text">
           <string>Name</string>
          </property>
         </widget>
        </item>
-       <item row="8" column="1">
+       <item row="9" column="1">
         <widget class="QLabel" name="networkName">
          <property name="cursor">
           <cursorShape>IBeamCursor</cursorShape>
@@ -220,14 +246,14 @@
          </property>
         </widget>
        </item>
-       <item row="9" column="0">
+       <item row="10" column="0">
         <widget class="QLabel" name="label_7">
          <property name="text">
           <string>Number of connections</string>
          </property>
         </widget>
        </item>
-       <item row="9" column="1">
+       <item row="10" column="1">
         <widget class="QLabel" name="numberOfConnections">
          <property name="cursor">
           <cursorShape>IBeamCursor</cursorShape>
@@ -243,7 +269,7 @@
          </property>
         </widget>
        </item>
-       <item row="10" column="0">
+       <item row="11" column="0">
         <widget class="QLabel" name="label_10">
          <property name="font">
           <font>
@@ -256,14 +282,14 @@
          </property>
         </widget>
        </item>
-       <item row="11" column="0">
+       <item row="12" column="0">
         <widget class="QLabel" name="label_3">
          <property name="text">
           <string>Current number of blocks</string>
          </property>
         </widget>
        </item>
-       <item row="11" column="1">
+       <item row="12" column="1">
         <widget class="QLabel" name="numberOfBlocks">
          <property name="cursor">
           <cursorShape>IBeamCursor</cursorShape>
@@ -279,14 +305,14 @@
          </property>
         </widget>
        </item>
-       <item row="12" column="0">
+       <item row="13" column="0">
         <widget class="QLabel" name="label_2">
          <property name="text">
           <string>Last block time</string>
          </property>
         </widget>
        </item>
-       <item row="12" column="1">
+       <item row="13" column="1">
         <widget class="QLabel" name="lastBlockTime">
          <property name="cursor">
           <cursorShape>IBeamCursor</cursorShape>
@@ -302,7 +328,7 @@
          </property>
         </widget>
        </item>
-       <item row="13" column="0">
+       <item row="14" column="0">
         <spacer name="verticalSpacer_2">
          <property name="orientation">
           <enum>Qt::Vertical</enum>
@@ -315,7 +341,7 @@
          </property>
         </spacer>
        </item>
-       <item row="14" column="0">
+       <item row="15" column="0">
         <widget class="QLabel" name="labelDebugLogfile">
          <property name="font">
           <font>
@@ -328,7 +354,7 @@
          </property>
         </widget>
        </item>
-       <item row="15" column="0">
+       <item row="16" column="0">
         <widget class="QPushButton" name="openDebugLogfileButton">
          <property name="toolTip">
           <string>Open the Bitcoin Core debug log file from the current data directory. This can take a few seconds for large log files.</string>
@@ -341,7 +367,7 @@
          </property>
         </widget>
        </item>
-       <item row="16" column="0">
+       <item row="17" column="0">
         <spacer name="verticalSpacer">
          <property name="orientation">
           <enum>Qt::Vertical</enum>
diff --git a/src/qt/optionsdialog.cpp b/src/qt/optionsdialog.cpp
index 062c4540ee..f57c1203f6 100644
--- a/src/qt/optionsdialog.cpp
+++ b/src/qt/optionsdialog.cpp
@@ -35,7 +35,7 @@ OptionsDialog::OptionsDialog(QWidget *parent, bool enableWallet) :
     ui(new Ui::OptionsDialog),
     model(0),
     mapper(0),
-    fProxyIpValid(true)
+    fProxyIpsValid(true)
 {
     ui->setupUi(this);
 
@@ -54,10 +54,18 @@ OptionsDialog::OptionsDialog(QWidget *parent, bool enableWallet) :
     ui->proxyPort->setEnabled(false);
     ui->proxyPort->setValidator(new QIntValidator(1, 65535, this));
 
+    ui->proxyIpTor->setEnabled(false);
+    ui->proxyPortTor->setEnabled(false);
+    ui->proxyPortTor->setValidator(new QIntValidator(1, 65535, this));
+
     connect(ui->connectSocks, SIGNAL(toggled(bool)), ui->proxyIp, SLOT(setEnabled(bool)));
     connect(ui->connectSocks, SIGNAL(toggled(bool)), ui->proxyPort, SLOT(setEnabled(bool)));
 
+    connect(ui->connectSocksTor, SIGNAL(toggled(bool)), ui->proxyIpTor, SLOT(setEnabled(bool)));
+    connect(ui->connectSocksTor, SIGNAL(toggled(bool)), ui->proxyPortTor, SLOT(setEnabled(bool)));
+
     ui->proxyIp->installEventFilter(this);
+    ui->proxyIpTor->installEventFilter(this);
 
     /* Window elements init */
 #ifdef Q_OS_MAC
@@ -110,7 +118,7 @@ OptionsDialog::OptionsDialog(QWidget *parent, bool enableWallet) :
     mapper->setSubmitPolicy(QDataWidgetMapper::ManualSubmit);
     mapper->setOrientation(Qt::Vertical);
 
-    /* setup/change UI elements when proxy IP is invalid/valid */
+    /* setup/change UI elements when proxy IPs are invalid/valid */
     connect(this, SIGNAL(proxyIpChecks(QValidatedLineEdit *, int)), this, SLOT(doProxyIpChecks(QValidatedLineEdit *, int)));
 }
 
@@ -137,6 +145,8 @@ void OptionsDialog::setModel(OptionsModel *model)
         mapper->setModel(model);
         setMapper();
         mapper->toFirst();
+
+        updateDefaultProxyNets();
     }
 
     /* warn when one of the following settings changes by user action (placed here so init via mapper doesn't trigger them) */
@@ -149,6 +159,7 @@ void OptionsDialog::setModel(OptionsModel *model)
     /* Network */
     connect(ui->allowIncoming, SIGNAL(clicked(bool)), this, SLOT(showRestartWarning()));
     connect(ui->connectSocks, SIGNAL(clicked(bool)), this, SLOT(showRestartWarning()));
+    connect(ui->connectSocksTor, SIGNAL(clicked(bool)), this, SLOT(showRestartWarning()));
     /* Display */
     connect(ui->lang, SIGNAL(valueChanged()), this, SLOT(showRestartWarning()));
     connect(ui->thirdPartyTxUrls, SIGNAL(textChanged(const QString &)), this, SLOT(showRestartWarning()));
@@ -173,6 +184,10 @@ void OptionsDialog::setMapper()
     mapper->addMapping(ui->proxyIp, OptionsModel::ProxyIP);
     mapper->addMapping(ui->proxyPort, OptionsModel::ProxyPort);
 
+    mapper->addMapping(ui->connectSocksTor, OptionsModel::ProxyUseTor);
+    mapper->addMapping(ui->proxyIpTor, OptionsModel::ProxyIPTor);
+    mapper->addMapping(ui->proxyPortTor, OptionsModel::ProxyPortTor);
+
     /* Window */
 #ifndef Q_OS_MAC
     mapper->addMapping(ui->minimizeToTray, OptionsModel::MinimizeToTray);
@@ -188,7 +203,7 @@ void OptionsDialog::setMapper()
 void OptionsDialog::enableOkButton()
 {
     /* prevent enabling of the OK button when data modified, if there is an invalid proxy address present */
-    if(fProxyIpValid)
+    if(fProxyIpsValid)
         setOkButtonState(true);
 }
 
@@ -224,6 +239,7 @@ void OptionsDialog::on_okButton_clicked()
 {
     mapper->submit();
     accept();
+    updateDefaultProxyNets();
 }
 
 void OptionsDialog::on_cancelButton_clicked()
@@ -257,11 +273,10 @@ void OptionsDialog::doProxyIpChecks(QValidatedLineEdit *pUiProxyIp, int nProxyPo
 {
     Q_UNUSED(nProxyPort);
 
-    const std::string strAddrProxy = pUiProxyIp->text().toStdString();
     CService addrProxy;
 
     /* Check for a valid IPv4 / IPv6 address */
-    if (!(fProxyIpValid = LookupNumeric(strAddrProxy.c_str(), addrProxy)))
+    if (!(fProxyIpsValid = LookupNumeric(pUiProxyIp->text().toStdString().c_str(), addrProxy)))
     {
         disableOkButton();
         pUiProxyIp->setValid(false);
@@ -275,6 +290,28 @@ void OptionsDialog::doProxyIpChecks(QValidatedLineEdit *pUiProxyIp, int nProxyPo
     }
 }
 
+void OptionsDialog::updateDefaultProxyNets()
+{
+    proxyType proxy;
+    std::string strProxy;
+    QString strDefaultProxyGUI;
+
+    GetProxy(NET_IPV4, proxy);
+    strProxy = proxy.proxy.ToStringIP() + ":" + proxy.proxy.ToStringPort();
+    strDefaultProxyGUI = ui->proxyIp->text() + ":" + ui->proxyPort->text();
+    (strProxy == strDefaultProxyGUI.toStdString()) ? ui->proxyReachIPv4->setChecked(true) : ui->proxyReachIPv4->setChecked(false);
+
+    GetProxy(NET_IPV6, proxy);
+    strProxy = proxy.proxy.ToStringIP() + ":" + proxy.proxy.ToStringPort();
+    strDefaultProxyGUI = ui->proxyIp->text() + ":" + ui->proxyPort->text();
+    (strProxy == strDefaultProxyGUI.toStdString()) ? ui->proxyReachIPv6->setChecked(true) : ui->proxyReachIPv6->setChecked(false);
+
+    GetProxy(NET_TOR, proxy);
+    strProxy = proxy.proxy.ToStringIP() + ":" + proxy.proxy.ToStringPort();
+    strDefaultProxyGUI = ui->proxyIp->text() + ":" + ui->proxyPort->text();
+    (strProxy == strDefaultProxyGUI.toStdString()) ? ui->proxyReachTor->setChecked(true) : ui->proxyReachTor->setChecked(false);
+}
+
 bool OptionsDialog::eventFilter(QObject *object, QEvent *event)
 {
     if(event->type() == QEvent::FocusOut)
@@ -283,6 +320,10 @@ bool OptionsDialog::eventFilter(QObject *object, QEvent *event)
         {
             Q_EMIT proxyIpChecks(ui->proxyIp, ui->proxyPort->text().toInt());
         }
+        else if(object == ui->proxyIpTor)
+        {
+            Q_EMIT proxyIpChecks(ui->proxyIpTor, ui->proxyPortTor->text().toInt());
+        }
     }
     return QDialog::eventFilter(object, event);
 }
diff --git a/src/qt/optionsdialog.h b/src/qt/optionsdialog.h
index fa983e798c..348489c599 100644
--- a/src/qt/optionsdialog.h
+++ b/src/qt/optionsdialog.h
@@ -47,6 +47,8 @@ private Q_SLOTS:
     void showRestartWarning(bool fPersistent = false);
     void clearStatusLabel();
     void doProxyIpChecks(QValidatedLineEdit *pUiProxyIp, int nProxyPort);
+    /* query the networks, for which the default proxy is used */
+    void updateDefaultProxyNets();
 
 Q_SIGNALS:
     void proxyIpChecks(QValidatedLineEdit *pUiProxyIp, int nProxyPort);
@@ -55,7 +57,7 @@ private:
     Ui::OptionsDialog *ui;
     OptionsModel *model;
     QDataWidgetMapper *mapper;
-    bool fProxyIpValid;
+    bool fProxyIpsValid;
 };
 
 #endif // BITCOIN_QT_OPTIONSDIALOG_H
diff --git a/src/qt/optionsmodel.cpp b/src/qt/optionsmodel.cpp
index 6191edc44c..65e490570e 100644
--- a/src/qt/optionsmodel.cpp
+++ b/src/qt/optionsmodel.cpp
@@ -117,6 +117,16 @@ void OptionsModel::Init()
     else if(!settings.value("fUseProxy").toBool() && !GetArg("-proxy", "").empty())
         addOverriddenOption("-proxy");
 
+    if (!settings.contains("fUseSeparateProxyTor"))
+        settings.setValue("fUseSeparateProxyTor", false);
+    if (!settings.contains("addrSeparateProxyTor"))
+        settings.setValue("addrSeparateProxyTor", "127.0.0.1:9050");
+    // Only try to set -onion, if user has enabled fUseSeparateProxyTor
+    if (settings.value("fUseSeparateProxyTor").toBool() && !SoftSetArg("-onion", settings.value("addrSeparateProxyTor").toString().toStdString()))
+        addOverriddenOption("-onion");
+    else if(!settings.value("fUseSeparateProxyTor").toBool() && !GetArg("-onion", "").empty())
+        addOverriddenOption("-onion");
+
     // Display
     if (!settings.contains("language"))
         settings.setValue("language", "");
@@ -178,6 +188,20 @@ QVariant OptionsModel::data(const QModelIndex & index, int role) const
             return strlIpPort.at(1);
         }
 
+        // separate Tor proxy
+        case ProxyUseTor:
+            return settings.value("fUseSeparateProxyTor", false);
+        case ProxyIPTor: {
+            // contains IP at index 0 and port at index 1
+            QStringList strlIpPort = settings.value("addrSeparateProxyTor").toString().split(":", QString::SkipEmptyParts);
+            return strlIpPort.at(0);
+        }
+        case ProxyPortTor: {
+            // contains IP at index 0 and port at index 1
+            QStringList strlIpPort = settings.value("addrSeparateProxyTor").toString().split(":", QString::SkipEmptyParts);
+            return strlIpPort.at(1);
+        }
+
 #ifdef ENABLE_WALLET
         case SpendZeroConfChange:
             return settings.value("bSpendZeroConfChange");
@@ -259,6 +283,39 @@ bool OptionsModel::setData(const QModelIndex & index, const QVariant & value, in
             }
         }
         break;
+
+        // separate Tor proxy
+        case ProxyUseTor:
+            if (settings.value("fUseSeparateProxyTor") != value) {
+                settings.setValue("fUseSeparateProxyTor", value.toBool());
+                setRestartRequired(true);
+            }
+            break;
+        case ProxyIPTor: {
+            // contains current IP at index 0 and current port at index 1
+            QStringList strlIpPort = settings.value("addrSeparateProxyTor").toString().split(":", QString::SkipEmptyParts);
+            // if that key doesn't exist or has a changed IP
+            if (!settings.contains("addrSeparateProxyTor") || strlIpPort.at(0) != value.toString()) {
+                // construct new value from new IP and current port
+                QString strNewValue = value.toString() + ":" + strlIpPort.at(1);
+                settings.setValue("addrSeparateProxyTor", strNewValue);
+                setRestartRequired(true);
+            }
+        }
+        break;
+        case ProxyPortTor: {
+            // contains current IP at index 0 and current port at index 1
+            QStringList strlIpPort = settings.value("addrSeparateProxyTor").toString().split(":", QString::SkipEmptyParts);
+            // if that key doesn't exist or has a changed port
+            if (!settings.contains("addrSeparateProxyTor") || strlIpPort.at(1) != value.toString()) {
+                // construct new value from current IP and new port
+                QString strNewValue = strlIpPort.at(0) + ":" + value.toString();
+                settings.setValue("addrSeparateProxyTor", strNewValue);
+                setRestartRequired(true);
+            }
+        }
+        break;
+
 #ifdef ENABLE_WALLET
         case SpendZeroConfChange:
             if (settings.value("bSpendZeroConfChange") != value) {
diff --git a/src/qt/optionsmodel.h b/src/qt/optionsmodel.h
index fc26d65b04..8448cad8de 100644
--- a/src/qt/optionsmodel.h
+++ b/src/qt/optionsmodel.h
@@ -34,6 +34,9 @@ public:
         ProxyUse,               // bool
         ProxyIP,                // QString
         ProxyPort,              // int
+        ProxyUseTor,            // bool
+        ProxyIPTor,             // QString
+        ProxyPortTor,           // int
         DisplayUnit,            // BitcoinUnits::Unit
         ThirdPartyTxUrls,       // QString
         Language,               // QString
diff --git a/src/qt/res/icons/about_qt.png b/src/qt/res/icons/about_qt.png
index dd27a99d0a..c40abfd3a6 100644
--- a/src/qt/res/icons/about_qt.png
+++ b/src/qt/res/icons/about_qt.png
diff --git a/src/qt/res/icons/clock1.png b/src/qt/res/icons/clock1.png
index ceae5ed0d9..162204d1bb 100644
--- a/src/qt/res/icons/clock1.png
+++ b/src/qt/res/icons/clock1.png
diff --git a/src/qt/res/icons/clock2.png b/src/qt/res/icons/clock2.png
index 159f69a8fc..8f4263a31c 100644
--- a/src/qt/res/icons/clock2.png
+++ b/src/qt/res/icons/clock2.png
diff --git a/src/qt/res/icons/clock3.png b/src/qt/res/icons/clock3.png
index d668e35ffc..7f11a7566c 100644
--- a/src/qt/res/icons/clock3.png
+++ b/src/qt/res/icons/clock3.png
diff --git a/src/qt/res/icons/clock4.png b/src/qt/res/icons/clock4.png
index 5ebf8ed7ac..fdd1a0fce3 100644
--- a/src/qt/res/icons/clock4.png
+++ b/src/qt/res/icons/clock4.png
diff --git a/src/qt/res/icons/clock5.png b/src/qt/res/icons/clock5.png
index 96f15ef7d9..7d6556c6cf 100644
--- a/src/qt/res/icons/clock5.png
+++ b/src/qt/res/icons/clock5.png
diff --git a/src/qt/res/icons/connect0.png b/src/qt/res/icons/connect0.png
index 58e2c3e965..ef708d81fb 100644
--- a/src/qt/res/icons/connect0.png
+++ b/src/qt/res/icons/connect0.png
diff --git a/src/qt/res/icons/connect1.png b/src/qt/res/icons/connect1.png
index 949e7a922d..ed358e6f8e 100644
--- a/src/qt/res/icons/connect1.png
+++ b/src/qt/res/icons/connect1.png
diff --git a/src/qt/res/icons/connect2.png b/src/qt/res/icons/connect2.png
index 143b2054fb..3bbb0d395c 100644
--- a/src/qt/res/icons/connect2.png
+++ b/src/qt/res/icons/connect2.png
diff --git a/src/qt/res/icons/connect3.png b/src/qt/res/icons/connect3.png
index 143b2054fb..0db99ad8d3 100644
--- a/src/qt/res/icons/connect3.png
+++ b/src/qt/res/icons/connect3.png
diff --git a/src/qt/res/icons/connect4.png b/src/qt/res/icons/connect4.png
index f96e3455ce..9dd19fc2bd 100644
--- a/src/qt/res/icons/connect4.png
+++ b/src/qt/res/icons/connect4.png
diff --git a/src/qt/res/icons/transaction0.png b/src/qt/res/icons/transaction0.png
index 1091b86e68..72c44565ec 100644
--- a/src/qt/res/icons/transaction0.png
+++ b/src/qt/res/icons/transaction0.png
diff --git a/src/qt/res/icons/warning.png b/src/qt/res/icons/warning.png
index 723a30a658..6bc5ac7895 100644
--- a/src/qt/res/icons/warning.png
+++ b/src/qt/res/icons/warning.png
diff --git a/src/qt/res/src/clock_1.svg b/src/qt/res/src/clock_1.svg
index 4e49772d26..2a3d84c2d0 100644
--- a/src/qt/res/src/clock_1.svg
+++ b/src/qt/res/src/clock_1.svg
@@ -9,5 +9,7 @@
 		c-57.8,0-112.1,22.5-153,63.4c-40.9,40.9-63.4,95.2-63.4,153c0,57.8,22.5,112.1,63.4,153c40.9,40.9,95.2,63.4,153,63.4
 		c57.8,0,112.1-22.5,153-63.4c40.9-40.9,63.4-95.2,63.4-153c0-57.8-22.5-112.1-63.4-153C409.8,227.1,355.4,204.6,297.6,204.6z"/>
 </g>
-<polygon points="478.3,253.4 297.6,184.6 297.6,420.9 534,420.9 "/>
+<path
+	d="M 478.3,253.4 297.6,184.6 c 0,0 0,78.8 0,118.2 0,117.5 -0.4,118.1 118.2,118.1 39.4,0 118.2,0 118.2,0 z"
+	id="polygon7" />
 </svg>
diff --git a/src/qt/res/src/clock_2.svg b/src/qt/res/src/clock_2.svg
index 995446e46e..2de8d467b7 100644
--- a/src/qt/res/src/clock_2.svg
+++ b/src/qt/res/src/clock_2.svg
@@ -9,6 +9,5 @@
 		c-57.8,0-112.1,22.5-153,63.4c-40.9,40.9-63.4,95.2-63.4,153c0,57.8,22.5,112.1,63.4,153c40.9,40.9,95.2,63.4,153,63.4
 		c57.8,0,112.1-22.5,153-63.4c40.9-40.9,63.4-95.2,63.4-153c0-57.8-22.5-112.1-63.4-153C409.8,227.1,355.4,204.6,297.6,204.6z"/>
 </g>
-<polygon points="465.2,601.6 534,420.9 297.6,420.9 297.6,657.3 "/>
-<polygon points="478.3,253.4 297.6,184.6 297.6,420.9 534,420.9 "/>
+<polygon points="465.2,601.6 534,420.9 478.3,253.4 297.6,184.6 297.6,420.9 297.6,657.3 "/>
 </svg>
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diff --git a/src/qt/res/src/connect-1.svg b/src/qt/res/src/connect-1.svg
index d3d4e46a41..d17928c97d 100644
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diff --git a/src/qt/res/src/transaction0.svg b/src/qt/res/src/transaction0.svg
new file mode 100644
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+   viewBox="0 0 128 127.9"
+   height="36.12mm"
+   width="36.12mm">
+  <defs
+     id="defs4144" />
+  <metadata
+     id="metadata4147">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     id="layer1"
+     transform="translate(-284.4,-501.6)">
+    <path
+       id="path4792"
+       d="m 348.8,513.8 c -12.7,-0.7 -24.9,9.1 -27,21.7 -3.8,8.8 7.2,13.7 13.7,9.2 3.1,-7.5 9.4,-17.9 18.9,-11.6 9.7,6.1 2.1,17.6 -3,24.1 -6.1,7.8 -11.4,14.8 -8.9,23 5.4,17.7 10.8,3.7 12.8,-0.1 4.3,-8.2 6,-8.8 11.5,-16.1 6.4,-8.6 11.6,-19.9 7.7,-30.8 -2.8,-11.5 -13.9,-19.9 -25.7,-19.4 z m -0.7,84.7 c -11.4,2.4 -9.1,19.5 2.7,17.1 11.8,-2.4 8.7,-19.5 -2.7,-17.1 z"
+       style="fill:#000000" />
+  </g>
+</svg>
diff --git a/src/qt/rpcconsole.cpp b/src/qt/rpcconsole.cpp
index 4453ceb563..d9d4f1d0ed 100644
--- a/src/qt/rpcconsole.cpp
+++ b/src/qt/rpcconsole.cpp
@@ -330,10 +330,10 @@ void RPCConsole::setClientModel(ClientModel *model)
 
         // Provide initial values
         ui->clientVersion->setText(model->formatFullVersion());
+        ui->clientUserAgent->setText(model->formatSubVersion());
         ui->clientName->setText(model->clientName());
         ui->buildDate->setText(model->formatBuildDate());
         ui->startupTime->setText(model->formatClientStartupTime());
-
         ui->networkName->setText(QString::fromStdString(Params().NetworkIDString()));
     }
 }
diff --git a/src/qt/sendcoinsdialog.cpp b/src/qt/sendcoinsdialog.cpp
index 449a7bc5e8..60a3fc128e 100644
--- a/src/qt/sendcoinsdialog.cpp
+++ b/src/qt/sendcoinsdialog.cpp
@@ -754,10 +754,9 @@ void SendCoinsDialog::coinControlChangeEdited(const QString& text)
         }
         else // Valid address
         {
-            CPubKey pubkey;
             CKeyID keyid;
             addr.GetKeyID(keyid);
-            if (!model->getPubKey(keyid, pubkey)) // Unknown change address
+            if (!model->havePrivKey(keyid)) // Unknown change address
             {
                 ui->labelCoinControlChangeLabel->setText(tr("Warning: Unknown change address"));
             }
diff --git a/src/qt/transactiondesc.cpp b/src/qt/transactiondesc.cpp
index af78a51d0f..801c6c62d2 100644
--- a/src/qt/transactiondesc.cpp
+++ b/src/qt/transactiondesc.cpp
@@ -165,7 +165,7 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionReco
 
         if (fAllFromMe)
         {
-            if(fAllFromMe == ISMINE_WATCH_ONLY)
+            if(fAllFromMe & ISMINE_WATCH_ONLY)
                 strHTML += "<b>" + tr("From") + ":</b> " + tr("watch-only") + "<br>";
 
             //
@@ -190,7 +190,7 @@ QString TransactionDesc::toHTML(CWallet *wallet, CWalletTx &wtx, TransactionReco
                         strHTML += GUIUtil::HtmlEscape(CBitcoinAddress(address).ToString());
                         if(toSelf == ISMINE_SPENDABLE)
                             strHTML += " (own address)";
-                        else if(toSelf == ISMINE_WATCH_ONLY)
+                        else if(toSelf & ISMINE_WATCH_ONLY)
                             strHTML += " (watch-only)";
                         strHTML += "<br>";
                     }
diff --git a/src/qt/transactionrecord.cpp b/src/qt/transactionrecord.cpp
index 15d13e9fc9..d8623daf5d 100644
--- a/src/qt/transactionrecord.cpp
+++ b/src/qt/transactionrecord.cpp
@@ -56,7 +56,7 @@ QList<TransactionRecord> TransactionRecord::decomposeTransaction(const CWallet *
                 CTxDestination address;
                 sub.idx = parts.size(); // sequence number
                 sub.credit = txout.nValue;
-                sub.involvesWatchAddress = mine == ISMINE_WATCH_ONLY;
+                sub.involvesWatchAddress = mine & ISMINE_WATCH_ONLY;
                 if (ExtractDestination(txout.scriptPubKey, address) && IsMine(*wallet, address))
                 {
                     // Received by Bitcoin Address
@@ -86,7 +86,7 @@ QList<TransactionRecord> TransactionRecord::decomposeTransaction(const CWallet *
         BOOST_FOREACH(const CTxIn& txin, wtx.vin)
         {
             isminetype mine = wallet->IsMine(txin);
-            if(mine == ISMINE_WATCH_ONLY) involvesWatchAddress = true;
+            if(mine & ISMINE_WATCH_ONLY) involvesWatchAddress = true;
             if(fAllFromMe > mine) fAllFromMe = mine;
         }
 
@@ -94,7 +94,7 @@ QList<TransactionRecord> TransactionRecord::decomposeTransaction(const CWallet *
         BOOST_FOREACH(const CTxOut& txout, wtx.vout)
         {
             isminetype mine = wallet->IsMine(txout);
-            if(mine == ISMINE_WATCH_ONLY) involvesWatchAddress = true;
+            if(mine & ISMINE_WATCH_ONLY) involvesWatchAddress = true;
             if(fAllToMe > mine) fAllToMe = mine;
         }
 
diff --git a/src/qt/walletmodel.cpp b/src/qt/walletmodel.cpp
index f580853732..5c21db8bdf 100644
--- a/src/qt/walletmodel.cpp
+++ b/src/qt/walletmodel.cpp
@@ -556,6 +556,11 @@ bool WalletModel::getPubKey(const CKeyID &address, CPubKey& vchPubKeyOut) const
     return wallet->GetPubKey(address, vchPubKeyOut);
 }
 
+bool WalletModel::havePrivKey(const CKeyID &address) const
+{
+    return wallet->HaveKey(address);
+}
+
 // returns a list of COutputs from COutPoints
 void WalletModel::getOutputs(const std::vector<COutPoint>& vOutpoints, std::vector<COutput>& vOutputs)
 {
diff --git a/src/qt/walletmodel.h b/src/qt/walletmodel.h
index c29682e4f6..a5e877d81f 100644
--- a/src/qt/walletmodel.h
+++ b/src/qt/walletmodel.h
@@ -187,6 +187,7 @@ public:
     UnlockContext requestUnlock();
 
     bool getPubKey(const CKeyID &address, CPubKey& vchPubKeyOut) const;
+    bool havePrivKey(const CKeyID &address) const;
     void getOutputs(const std::vector<COutPoint>& vOutpoints, std::vector<COutput>& vOutputs);
     bool isSpent(const COutPoint& outpoint) const;
     void listCoins(std::map<QString, std::vector<COutput> >& mapCoins) const;
diff --git a/src/rest.cpp b/src/rest.cpp
index 0dd238b683..74d27e73bb 100644
--- a/src/rest.cpp
+++ b/src/rest.cpp
@@ -65,6 +65,8 @@ public:
 
 extern void TxToJSON(const CTransaction& tx, const uint256 hashBlock, UniValue& entry);
 extern UniValue blockToJSON(const CBlock& block, const CBlockIndex* blockindex, bool txDetails = false);
+extern UniValue mempoolInfoToJSON();
+extern UniValue mempoolToJSON(bool fVerbose = false);
 extern void ScriptPubKeyToJSON(const CScript& scriptPubKey, UniValue& out, bool fIncludeHex);
 extern UniValue blockheaderToJSON(const CBlockIndex* blockindex);
 
@@ -293,6 +295,58 @@ static bool rest_chaininfo(AcceptedConnection* conn,
     return true; // continue to process further HTTP reqs on this cxn
 }
 
+static bool rest_mempool_info(AcceptedConnection* conn,
+                              const std::string& strURIPart,
+                              const std::string& strRequest,
+                              const std::map<std::string, std::string>& mapHeaders,
+                              bool fRun)
+{
+    vector<string> params;
+    const RetFormat rf = ParseDataFormat(params, strURIPart);
+
+    switch (rf) {
+    case RF_JSON: {
+        UniValue mempoolInfoObject = mempoolInfoToJSON();
+
+        string strJSON = mempoolInfoObject.write() + "\n";
+        conn->stream() << HTTPReply(HTTP_OK, strJSON, fRun) << std::flush;
+        return true;
+    }
+    default: {
+        throw RESTERR(HTTP_NOT_FOUND, "output format not found (available: json)");
+    }
+    }
+
+    // not reached
+    return true; // continue to process further HTTP reqs on this cxn
+}
+
+static bool rest_mempool_contents(AcceptedConnection* conn,
+                                  const std::string& strURIPart,
+                                  const std::string& strRequest,
+                                  const std::map<std::string, std::string>& mapHeaders,
+                                  bool fRun)
+{
+    vector<string> params;
+    const RetFormat rf = ParseDataFormat(params, strURIPart);
+
+    switch (rf) {
+    case RF_JSON: {
+        UniValue mempoolObject = mempoolToJSON(true);
+
+        string strJSON = mempoolObject.write() + "\n";
+        conn->stream() << HTTPReply(HTTP_OK, strJSON, fRun) << std::flush;
+        return true;
+    }
+    default: {
+        throw RESTERR(HTTP_NOT_FOUND, "output format not found (available: json)");
+    }
+    }
+
+    // not reached
+    return true; // continue to process further HTTP reqs on this cxn
+}
+
 static bool rest_tx(AcceptedConnection* conn,
                     const std::string& strURIPart,
                     const std::string& strRequest,
@@ -553,6 +607,8 @@ static const struct {
       {"/rest/block/notxdetails/", rest_block_notxdetails},
       {"/rest/block/", rest_block_extended},
       {"/rest/chaininfo", rest_chaininfo},
+      {"/rest/mempool/info", rest_mempool_info},
+      {"/rest/mempool/contents", rest_mempool_contents},
       {"/rest/headers/", rest_headers},
       {"/rest/getutxos", rest_getutxos},
 };
diff --git a/src/rpcblockchain.cpp b/src/rpcblockchain.cpp
index 80d49490d2..e6751de96b 100644
--- a/src/rpcblockchain.cpp
+++ b/src/rpcblockchain.cpp
@@ -175,45 +175,8 @@ UniValue getdifficulty(const UniValue& params, bool fHelp)
     return GetDifficulty();
 }
 
-
-UniValue getrawmempool(const UniValue& params, bool fHelp)
+UniValue mempoolToJSON(bool fVerbose = false)
 {
-    if (fHelp || params.size() > 1)
-        throw runtime_error(
-            "getrawmempool ( verbose )\n"
-            "\nReturns all transaction ids in memory pool as a json array of string transaction ids.\n"
-            "\nArguments:\n"
-            "1. verbose           (boolean, optional, default=false) true for a json object, false for array of transaction ids\n"
-            "\nResult: (for verbose = false):\n"
-            "[                     (json array of string)\n"
-            "  \"transactionid\"     (string) The transaction id\n"
-            "  ,...\n"
-            "]\n"
-            "\nResult: (for verbose = true):\n"
-            "{                           (json object)\n"
-            "  \"transactionid\" : {       (json object)\n"
-            "    \"size\" : n,             (numeric) transaction size in bytes\n"
-            "    \"fee\" : n,              (numeric) transaction fee in " + CURRENCY_UNIT + "\n"
-            "    \"time\" : n,             (numeric) local time transaction entered pool in seconds since 1 Jan 1970 GMT\n"
-            "    \"height\" : n,           (numeric) block height when transaction entered pool\n"
-            "    \"startingpriority\" : n, (numeric) priority when transaction entered pool\n"
-            "    \"currentpriority\" : n,  (numeric) transaction priority now\n"
-            "    \"depends\" : [           (array) unconfirmed transactions used as inputs for this transaction\n"
-            "        \"transactionid\",    (string) parent transaction id\n"
-            "       ... ]\n"
-            "  }, ...\n"
-            "}\n"
-            "\nExamples\n"
-            + HelpExampleCli("getrawmempool", "true")
-            + HelpExampleRpc("getrawmempool", "true")
-        );
-
-    LOCK(cs_main);
-
-    bool fVerbose = false;
-    if (params.size() > 0)
-        fVerbose = params[0].get_bool();
-
     if (fVerbose)
     {
         LOCK(mempool.cs);
@@ -261,6 +224,47 @@ UniValue getrawmempool(const UniValue& params, bool fHelp)
     }
 }
 
+UniValue getrawmempool(const UniValue& params, bool fHelp)
+{
+    if (fHelp || params.size() > 1)
+        throw runtime_error(
+            "getrawmempool ( verbose )\n"
+            "\nReturns all transaction ids in memory pool as a json array of string transaction ids.\n"
+            "\nArguments:\n"
+            "1. verbose           (boolean, optional, default=false) true for a json object, false for array of transaction ids\n"
+            "\nResult: (for verbose = false):\n"
+            "[                     (json array of string)\n"
+            "  \"transactionid\"     (string) The transaction id\n"
+            "  ,...\n"
+            "]\n"
+            "\nResult: (for verbose = true):\n"
+            "{                           (json object)\n"
+            "  \"transactionid\" : {       (json object)\n"
+            "    \"size\" : n,             (numeric) transaction size in bytes\n"
+            "    \"fee\" : n,              (numeric) transaction fee in " + CURRENCY_UNIT + "\n"
+            "    \"time\" : n,             (numeric) local time transaction entered pool in seconds since 1 Jan 1970 GMT\n"
+            "    \"height\" : n,           (numeric) block height when transaction entered pool\n"
+            "    \"startingpriority\" : n, (numeric) priority when transaction entered pool\n"
+            "    \"currentpriority\" : n,  (numeric) transaction priority now\n"
+            "    \"depends\" : [           (array) unconfirmed transactions used as inputs for this transaction\n"
+            "        \"transactionid\",    (string) parent transaction id\n"
+            "       ... ]\n"
+            "  }, ...\n"
+            "}\n"
+            "\nExamples\n"
+            + HelpExampleCli("getrawmempool", "true")
+            + HelpExampleRpc("getrawmempool", "true")
+        );
+
+    LOCK(cs_main);
+
+    bool fVerbose = false;
+    if (params.size() > 0)
+        fVerbose = params[0].get_bool();
+
+    return mempoolToJSON(fVerbose);
+}
+
 UniValue getblockhash(const UniValue& params, bool fHelp)
 {
     if (fHelp || params.size() != 1)
@@ -757,6 +761,16 @@ UniValue getchaintips(const UniValue& params, bool fHelp)
     return res;
 }
 
+UniValue mempoolInfoToJSON()
+{
+    UniValue ret(UniValue::VOBJ);
+    ret.push_back(Pair("size", (int64_t) mempool.size()));
+    ret.push_back(Pair("bytes", (int64_t) mempool.GetTotalTxSize()));
+    ret.push_back(Pair("usage", (int64_t) mempool.DynamicMemoryUsage()));
+
+    return ret;
+}
+
 UniValue getmempoolinfo(const UniValue& params, bool fHelp)
 {
     if (fHelp || params.size() != 0)
@@ -774,12 +788,7 @@ UniValue getmempoolinfo(const UniValue& params, bool fHelp)
             + HelpExampleRpc("getmempoolinfo", "")
         );
 
-    UniValue ret(UniValue::VOBJ);
-    ret.push_back(Pair("size", (int64_t) mempool.size()));
-    ret.push_back(Pair("bytes", (int64_t) mempool.GetTotalTxSize()));
-    ret.push_back(Pair("usage", (int64_t) mempool.DynamicMemoryUsage()));
-
-    return ret;
+    return mempoolInfoToJSON();
 }
 
 UniValue invalidateblock(const UniValue& params, bool fHelp)
diff --git a/src/rpcclient.cpp b/src/rpcclient.cpp
index b41e960e8a..0c8e6d6d66 100644
--- a/src/rpcclient.cpp
+++ b/src/rpcclient.cpp
@@ -87,6 +87,8 @@ static const CRPCConvertParam vRPCConvertParams[] =
     { "lockunspent", 1 },
     { "importprivkey", 2 },
     { "importaddress", 2 },
+    { "importaddress", 3 },
+    { "importpubkey", 2 },
     { "verifychain", 0 },
     { "verifychain", 1 },
     { "keypoolrefill", 0 },
diff --git a/src/rpcmining.cpp b/src/rpcmining.cpp
index b7d4ff58fc..620a46be15 100644
--- a/src/rpcmining.cpp
+++ b/src/rpcmining.cpp
@@ -138,8 +138,12 @@ UniValue generate(const UniValue& params, bool fHelp)
     boost::shared_ptr<CReserveScript> coinbaseScript;
     GetMainSignals().ScriptForMining(coinbaseScript);
 
+    // If the keypool is exhausted, no script is returned at all.  Catch this.
+    if (!coinbaseScript)
+        throw JSONRPCError(RPC_WALLET_KEYPOOL_RAN_OUT, "Error: Keypool ran out, please call keypoolrefill first");
+
     //throw an error if no script was provided
-    if (!coinbaseScript->reserveScript.size())
+    if (coinbaseScript->reserveScript.empty())
         throw JSONRPCError(RPC_INTERNAL_ERROR, "No coinbase script available (mining requires a wallet)");
 
     {   // Don't keep cs_main locked
diff --git a/src/rpcrawtransaction.cpp b/src/rpcrawtransaction.cpp
index a3246b41fb..9eeca5b7d9 100644
--- a/src/rpcrawtransaction.cpp
+++ b/src/rpcrawtransaction.cpp
@@ -318,8 +318,9 @@ UniValue createrawtransaction(const UniValue& params, bool fHelp)
 {
     if (fHelp || params.size() != 2)
         throw runtime_error(
-            "createrawtransaction [{\"txid\":\"id\",\"vout\":n},...] {\"address\":amount,...}\n"
-            "\nCreate a transaction spending the given inputs and sending to the given addresses.\n"
+            "createrawtransaction [{\"txid\":\"id\",\"vout\":n},...] {\"address\":amount,\"data\":\"hex\",...}\n"
+            "\nCreate a transaction spending the given inputs and creating new outputs.\n"
+            "Outputs can be addresses or data.\n"
             "Returns hex-encoded raw transaction.\n"
             "Note that the transaction's inputs are not signed, and\n"
             "it is not stored in the wallet or transmitted to the network.\n"
@@ -328,23 +329,25 @@ UniValue createrawtransaction(const UniValue& params, bool fHelp)
             "1. \"transactions\"        (string, required) A json array of json objects\n"
             "     [\n"
             "       {\n"
-            "         \"txid\":\"id\",  (string, required) The transaction id\n"
+            "         \"txid\":\"id\",    (string, required) The transaction id\n"
             "         \"vout\":n        (numeric, required) The output number\n"
             "       }\n"
             "       ,...\n"
             "     ]\n"
-            "2. \"addresses\"           (string, required) a json object with addresses as keys and amounts as values\n"
+            "2. \"outputs\"             (string, required) a json object with outputs\n"
             "    {\n"
             "      \"address\": x.xxx   (numeric, required) The key is the bitcoin address, the value is the " + CURRENCY_UNIT + " amount\n"
-            "      ,...\n"
+            "      \"data\": \"hex\",     (string, required) The key is \"data\", the value is hex encoded data\n"
+            "      ...\n"
             "    }\n"
-
             "\nResult:\n"
             "\"transaction\"            (string) hex string of the transaction\n"
 
             "\nExamples\n"
             + HelpExampleCli("createrawtransaction", "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]\" \"{\\\"address\\\":0.01}\"")
+            + HelpExampleCli("createrawtransaction", "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]\" \"{\\\"data\\\":\\\"00010203\\\"}\"")
             + HelpExampleRpc("createrawtransaction", "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]\", \"{\\\"address\\\":0.01}\"")
+            + HelpExampleRpc("createrawtransaction", "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]\", \"{\\\"data\\\":\\\"00010203\\\"}\"")
         );
 
     LOCK(cs_main);
@@ -375,19 +378,27 @@ UniValue createrawtransaction(const UniValue& params, bool fHelp)
     set<CBitcoinAddress> setAddress;
     vector<string> addrList = sendTo.getKeys();
     BOOST_FOREACH(const string& name_, addrList) {
-        CBitcoinAddress address(name_);
-        if (!address.IsValid())
-            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, string("Invalid Bitcoin address: ")+name_);
 
-        if (setAddress.count(address))
-            throw JSONRPCError(RPC_INVALID_PARAMETER, string("Invalid parameter, duplicated address: ")+name_);
-        setAddress.insert(address);
+        if (name_ == "data") {
+            std::vector<unsigned char> data = ParseHexV(sendTo[name_].getValStr(),"Data");
+
+            CTxOut out(0, CScript() << OP_RETURN << data);
+            rawTx.vout.push_back(out);
+        } else {
+            CBitcoinAddress address(name_);
+            if (!address.IsValid())
+                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, string("Invalid Bitcoin address: ")+name_);
 
-        CScript scriptPubKey = GetScriptForDestination(address.Get());
-        CAmount nAmount = AmountFromValue(sendTo[name_]);
+            if (setAddress.count(address))
+                throw JSONRPCError(RPC_INVALID_PARAMETER, string("Invalid parameter, duplicated address: ")+name_);
+            setAddress.insert(address);
 
-        CTxOut out(nAmount, scriptPubKey);
-        rawTx.vout.push_back(out);
+            CScript scriptPubKey = GetScriptForDestination(address.Get());
+            CAmount nAmount = AmountFromValue(sendTo[name_]);
+
+            CTxOut out(nAmount, scriptPubKey);
+            rawTx.vout.push_back(out);
+        }
     }
 
     return EncodeHexTx(rawTx);
diff --git a/src/rpcserver.cpp b/src/rpcserver.cpp
index 56993f32f5..9362401b1e 100644
--- a/src/rpcserver.cpp
+++ b/src/rpcserver.cpp
@@ -363,6 +363,7 @@ static const CRPCCommand vRPCCommands[] =
     { "wallet",             "importprivkey",          &importprivkey,          true  },
     { "wallet",             "importwallet",           &importwallet,           true  },
     { "wallet",             "importaddress",          &importaddress,          true  },
+    { "wallet",             "importpubkey",           &importpubkey,           true  },
     { "wallet",             "keypoolrefill",          &keypoolrefill,          true  },
     { "wallet",             "listaccounts",           &listaccounts,           false },
     { "wallet",             "listaddressgroupings",   &listaddressgroupings,   false },
diff --git a/src/rpcserver.h b/src/rpcserver.h
index 89d3980223..3a71fd510f 100644
--- a/src/rpcserver.h
+++ b/src/rpcserver.h
@@ -161,6 +161,7 @@ extern UniValue clearbanned(const UniValue& params, bool fHelp);
 extern UniValue dumpprivkey(const UniValue& params, bool fHelp); // in rpcdump.cpp
 extern UniValue importprivkey(const UniValue& params, bool fHelp);
 extern UniValue importaddress(const UniValue& params, bool fHelp);
+extern UniValue importpubkey(const UniValue& params, bool fHelp);
 extern UniValue dumpwallet(const UniValue& params, bool fHelp);
 extern UniValue importwallet(const UniValue& params, bool fHelp);
 
diff --git a/src/scheduler.cpp b/src/scheduler.cpp
index d5bb588b71..06115f5619 100644
--- a/src/scheduler.cpp
+++ b/src/scheduler.cpp
@@ -6,6 +6,7 @@
 
 #include <assert.h>
 #include <boost/bind.hpp>
+#include <boost/thread/reverse_lock.hpp>
 #include <utility>
 
 CScheduler::CScheduler() : nThreadsServicingQueue(0), stopRequested(false), stopWhenEmpty(false)
@@ -65,11 +66,12 @@ void CScheduler::serviceQueue()
             Function f = taskQueue.begin()->second;
             taskQueue.erase(taskQueue.begin());
 
-            // Unlock before calling f, so it can reschedule itself or another task
-            // without deadlocking:
-            lock.unlock();
-            f();
-            lock.lock();
+            {
+                // Unlock before calling f, so it can reschedule itself or another task
+                // without deadlocking:
+                boost::reverse_lock<boost::unique_lock<boost::mutex> > rlock(lock);
+                f();
+            }
         } catch (...) {
             --nThreadsServicingQueue;
             throw;
diff --git a/src/script/standard.cpp b/src/script/standard.cpp
index 66657127ab..1d5aac7b34 100644
--- a/src/script/standard.cpp
+++ b/src/script/standard.cpp
@@ -286,6 +286,11 @@ CScript GetScriptForDestination(const CTxDestination& dest)
     return script;
 }
 
+CScript GetScriptForRawPubKey(const CPubKey& pubKey)
+{
+    return CScript() << std::vector<unsigned char>(pubKey.begin(), pubKey.end()) << OP_CHECKSIG;
+}
+
 CScript GetScriptForMultisig(int nRequired, const std::vector<CPubKey>& keys)
 {
     CScript script;
diff --git a/src/script/standard.h b/src/script/standard.h
index 46ae5f9f10..9e17dac700 100644
--- a/src/script/standard.h
+++ b/src/script/standard.h
@@ -73,6 +73,7 @@ bool ExtractDestination(const CScript& scriptPubKey, CTxDestination& addressRet)
 bool ExtractDestinations(const CScript& scriptPubKey, txnouttype& typeRet, std::vector<CTxDestination>& addressRet, int& nRequiredRet);
 
 CScript GetScriptForDestination(const CTxDestination& dest);
+CScript GetScriptForRawPubKey(const CPubKey& pubkey);
 CScript GetScriptForMultisig(int nRequired, const std::vector<CPubKey>& keys);
 
 #endif // BITCOIN_SCRIPT_STANDARD_H
diff --git a/src/sync.cpp b/src/sync.cpp
index a422939964..1837e8d53d 100644
--- a/src/sync.cpp
+++ b/src/sync.cpp
@@ -33,20 +33,22 @@ void PrintLockContention(const char* pszName, const char* pszFile, int nLine)
 //
 
 struct CLockLocation {
-    CLockLocation(const char* pszName, const char* pszFile, int nLine)
+    CLockLocation(const char* pszName, const char* pszFile, int nLine, bool fTryIn)
     {
         mutexName = pszName;
         sourceFile = pszFile;
         sourceLine = nLine;
+        fTry = fTryIn;
     }
 
     std::string ToString() const
     {
-        return mutexName + "  " + sourceFile + ":" + itostr(sourceLine);
+        return mutexName + "  " + sourceFile + ":" + itostr(sourceLine) + (fTry ? " (TRY)" : "");
     }
 
     std::string MutexName() const { return mutexName; }
 
+    bool fTry;
 private:
     std::string mutexName;
     std::string sourceFile;
@@ -62,23 +64,52 @@ static boost::thread_specific_ptr<LockStack> lockstack;
 
 static void potential_deadlock_detected(const std::pair<void*, void*>& mismatch, const LockStack& s1, const LockStack& s2)
 {
+    // We attempt to not assert on probably-not deadlocks by assuming that
+    // a try lock will immediately have otherwise bailed if it had
+    // failed to get the lock
+    // We do this by, for the locks which triggered the potential deadlock,
+    // in either lockorder, checking that the second of the two which is locked
+    // is only a TRY_LOCK, ignoring locks if they are reentrant.
+    bool firstLocked = false;
+    bool secondLocked = false;
+    bool onlyMaybeDeadlock = false;
+
     LogPrintf("POTENTIAL DEADLOCK DETECTED\n");
     LogPrintf("Previous lock order was:\n");
     BOOST_FOREACH (const PAIRTYPE(void*, CLockLocation) & i, s2) {
-        if (i.first == mismatch.first)
+        if (i.first == mismatch.first) {
             LogPrintf(" (1)");
-        if (i.first == mismatch.second)
+            if (!firstLocked && secondLocked && i.second.fTry)
+                onlyMaybeDeadlock = true;
+            firstLocked = true;
+        }
+        if (i.first == mismatch.second) {
             LogPrintf(" (2)");
+            if (!secondLocked && firstLocked && i.second.fTry)
+                onlyMaybeDeadlock = true;
+            secondLocked = true;
+        }
         LogPrintf(" %s\n", i.second.ToString());
     }
+    firstLocked = false;
+    secondLocked = false;
     LogPrintf("Current lock order is:\n");
     BOOST_FOREACH (const PAIRTYPE(void*, CLockLocation) & i, s1) {
-        if (i.first == mismatch.first)
+        if (i.first == mismatch.first) {
             LogPrintf(" (1)");
-        if (i.first == mismatch.second)
+            if (!firstLocked && secondLocked && i.second.fTry)
+                onlyMaybeDeadlock = true;
+            firstLocked = true;
+        }
+        if (i.first == mismatch.second) {
             LogPrintf(" (2)");
+            if (!secondLocked && firstLocked && i.second.fTry)
+                onlyMaybeDeadlock = true;
+            secondLocked = true;
+        }
         LogPrintf(" %s\n", i.second.ToString());
     }
+    assert(onlyMaybeDeadlock);
 }
 
 static void push_lock(void* c, const CLockLocation& locklocation, bool fTry)
@@ -101,10 +132,8 @@ static void push_lock(void* c, const CLockLocation& locklocation, bool fTry)
             lockorders[p1] = (*lockstack);
 
             std::pair<void*, void*> p2 = std::make_pair(c, i.first);
-            if (lockorders.count(p2)) {
+            if (lockorders.count(p2))
                 potential_deadlock_detected(p1, lockorders[p2], lockorders[p1]);
-                break;
-            }
         }
     }
     dd_mutex.unlock();
@@ -119,7 +148,7 @@ static void pop_lock()
 
 void EnterCritical(const char* pszName, const char* pszFile, int nLine, void* cs, bool fTry)
 {
-    push_lock(cs, CLockLocation(pszName, pszFile, nLine), fTry);
+    push_lock(cs, CLockLocation(pszName, pszFile, nLine, fTry), fTry);
 }
 
 void LeaveCritical()
diff --git a/src/test/alert_tests.cpp b/src/test/alert_tests.cpp
index b8d5606cc3..dd3c51d09b 100644
--- a/src/test/alert_tests.cpp
+++ b/src/test/alert_tests.cpp
@@ -162,8 +162,8 @@ BOOST_AUTO_TEST_CASE(AlertNotify)
     SetMockTime(11);
     const std::vector<unsigned char>& alertKey = Params(CBaseChainParams::MAIN).AlertKey();
 
-    boost::filesystem::path temp = GetTempPath() / "alertnotify.txt";
-    boost::filesystem::remove(temp);
+    boost::filesystem::path temp = GetTempPath() /
+        boost::filesystem::unique_path("alertnotify-%%%%.txt");
 
     mapArgs["-alertnotify"] = std::string("echo %s >> ") + temp.string();
 
diff --git a/src/test/data/bitcoin-util-test.json b/src/test/data/bitcoin-util-test.json
index afd35af503..3bf80ca434 100644
--- a/src/test/data/bitcoin-util-test.json
+++ b/src/test/data/bitcoin-util-test.json
@@ -56,5 +56,35 @@
      "sign=ALL",
      "outaddr=0.001:193P6LtvS4nCnkDvM9uXn1gsSRqh4aDAz7"],
     "output_cmp": "txcreatesign.hex"
+  },
+  { "exec": "./bitcoin-tx",
+    "args":
+    ["-create",
+     "in=5897de6bd6027a475eadd57019d4e6872c396d0716c4875a5f1a6fcfdf385c1f:0",
+     "outdata=4:badhexdata"],
+    "return_code": 1
+  },
+  { "exec": "./bitcoin-tx",
+    "args":
+    ["-create",
+     "in=5897de6bd6027a475eadd57019d4e6872c396d0716c4875a5f1a6fcfdf385c1f:0",
+     "outdata=badhexdata"],
+    "return_code": 1
+  },
+  { "exec": "./bitcoin-tx",
+    "args":
+    ["-create",
+     "in=5897de6bd6027a475eadd57019d4e6872c396d0716c4875a5f1a6fcfdf385c1f:0",
+     "outaddr=0.18:13tuJJDR2RgArmgfv6JScSdreahzgc4T6o",
+     "outdata=4:54686973204f505f52455455524e207472616e73616374696f6e206f7574707574207761732063726561746564206279206d6f646966696564206372656174657261777472616e73616374696f6e2e"],
+    "output_cmp": "txcreatedata1.hex"
+  },
+  { "exec": "./bitcoin-tx",
+    "args":
+    ["-create",
+     "in=5897de6bd6027a475eadd57019d4e6872c396d0716c4875a5f1a6fcfdf385c1f:0",
+     "outaddr=0.18:13tuJJDR2RgArmgfv6JScSdreahzgc4T6o",
+     "outdata=54686973204f505f52455455524e207472616e73616374696f6e206f7574707574207761732063726561746564206279206d6f646966696564206372656174657261777472616e73616374696f6e2e"],
+    "output_cmp": "txcreatedata2.hex"
   }
 ]
diff --git a/src/test/data/txcreatedata1.hex b/src/test/data/txcreatedata1.hex
new file mode 100644
index 0000000000..eccc7604e6
--- /dev/null
+++ b/src/test/data/txcreatedata1.hex
@@ -0,0 +1 @@
+01000000011f5c38dfcf6f1a5f5a87c416076d392c87e6d41970d5ad5e477a02d66bde97580000000000ffffffff0280a81201000000001976a9141fc11f39be1729bf973a7ab6a615ca4729d6457488ac0084d71700000000526a4c4f54686973204f505f52455455524e207472616e73616374696f6e206f7574707574207761732063726561746564206279206d6f646966696564206372656174657261777472616e73616374696f6e2e00000000
diff --git a/src/test/data/txcreatedata2.hex b/src/test/data/txcreatedata2.hex
new file mode 100644
index 0000000000..3c7644c297
--- /dev/null
+++ b/src/test/data/txcreatedata2.hex
@@ -0,0 +1 @@
+01000000011f5c38dfcf6f1a5f5a87c416076d392c87e6d41970d5ad5e477a02d66bde97580000000000ffffffff0280a81201000000001976a9141fc11f39be1729bf973a7ab6a615ca4729d6457488ac0000000000000000526a4c4f54686973204f505f52455455524e207472616e73616374696f6e206f7574707574207761732063726561746564206279206d6f646966696564206372656174657261777472616e73616374696f6e2e00000000
diff --git a/src/test/limitedmap_tests.cpp b/src/test/limitedmap_tests.cpp
new file mode 100644
index 0000000000..faaddffad8
--- /dev/null
+++ b/src/test/limitedmap_tests.cpp
@@ -0,0 +1,101 @@
+// Copyright (c) 2012-2015 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include "limitedmap.h"
+
+#include "test/test_bitcoin.h"
+
+#include <boost/test/unit_test.hpp>
+
+BOOST_FIXTURE_TEST_SUITE(limitedmap_tests, BasicTestingSetup)
+
+BOOST_AUTO_TEST_CASE(limitedmap_test)
+{
+    // create a limitedmap capped at 10 items
+    limitedmap<int, int> map(10);
+
+    // check that the max size is 10
+    BOOST_CHECK(map.max_size() == 10);
+
+    // check that it's empty
+    BOOST_CHECK(map.size() == 0);
+
+    // insert (-1, -1)
+    map.insert(std::pair<int, int>(-1, -1));
+
+    // make sure that the size is updated
+    BOOST_CHECK(map.size() == 1);
+
+    // make sure that the new items is in the map
+    BOOST_CHECK(map.count(-1) == 1);
+
+    // insert 10 new items
+    for (int i = 0; i < 10; i++) {
+        map.insert(std::pair<int, int>(i, i + 1));
+    }
+
+    // make sure that the map now contains 10 items...
+    BOOST_CHECK(map.size() == 10);
+
+    // ...and that the first item has been discarded
+    BOOST_CHECK(map.count(-1) == 0);
+
+    // iterate over the map, both with an index and an iterator
+    limitedmap<int, int>::const_iterator it = map.begin();
+    for (int i = 0; i < 10; i++) {
+        // make sure the item is present
+        BOOST_CHECK(map.count(i) == 1);
+
+        // use the iterator to check for the expected key adn value
+        BOOST_CHECK(it->first == i);
+        BOOST_CHECK(it->second == i + 1);
+        
+        // use find to check for the value
+        BOOST_CHECK(map.find(i)->second == i + 1);
+        
+        // update and recheck
+        map.update(it, i + 2);
+        BOOST_CHECK(map.find(i)->second == i + 2);
+
+        it++;
+    }
+
+    // check that we've exhausted the iterator
+    BOOST_CHECK(it == map.end());
+
+    // resize the map to 5 items
+    map.max_size(5);
+
+    // check that the max size and size are now 5
+    BOOST_CHECK(map.max_size() == 5);
+    BOOST_CHECK(map.size() == 5);
+
+    // check that items less than 5 have been discarded
+    // and items greater than 5 are retained
+    for (int i = 0; i < 10; i++) {
+        if (i < 5) {
+            BOOST_CHECK(map.count(i) == 0);
+        } else {
+            BOOST_CHECK(map.count(i) == 1);
+        }
+    }
+
+    // erase some items not in the map
+    for (int i = 100; i < 1000; i += 100) {
+        map.erase(i);
+    }
+
+    // check that the size is unaffected
+    BOOST_CHECK(map.size() == 5);
+
+    // erase the remaining elements
+    for (int i = 5; i < 10; i++) {
+        map.erase(i);
+    }
+
+    // check that the map is now empty
+    BOOST_CHECK(map.empty());
+}
+
+BOOST_AUTO_TEST_SUITE_END()
diff --git a/src/test/rpc_tests.cpp b/src/test/rpc_tests.cpp
index 7946b02855..a65572e6f6 100644
--- a/src/test/rpc_tests.cpp
+++ b/src/test/rpc_tests.cpp
@@ -110,6 +110,24 @@ BOOST_AUTO_TEST_CASE(rpc_rawsign)
     BOOST_CHECK(find_value(r.get_obj(), "complete").get_bool() == true);
 }
 
+BOOST_AUTO_TEST_CASE(rpc_createraw_op_return)
+{
+    BOOST_CHECK_NO_THROW(CallRPC("createrawtransaction [{\"txid\":\"a3b807410df0b60fcb9736768df5823938b2f838694939ba45f3c0a1bff150ed\",\"vout\":0}] {\"data\":\"68656c6c6f776f726c64\"}"));
+
+    // Allow more than one data transaction output
+    BOOST_CHECK_NO_THROW(CallRPC("createrawtransaction [{\"txid\":\"a3b807410df0b60fcb9736768df5823938b2f838694939ba45f3c0a1bff150ed\",\"vout\":0}] {\"data\":\"68656c6c6f776f726c64\",\"data\":\"68656c6c6f776f726c64\"}"));
+
+    // Key not "data" (bad address)
+    BOOST_CHECK_THROW(CallRPC("createrawtransaction [{\"txid\":\"a3b807410df0b60fcb9736768df5823938b2f838694939ba45f3c0a1bff150ed\",\"vout\":0}] {\"somedata\":\"68656c6c6f776f726c64\"}"), runtime_error);
+
+    // Bad hex encoding of data output
+    BOOST_CHECK_THROW(CallRPC("createrawtransaction [{\"txid\":\"a3b807410df0b60fcb9736768df5823938b2f838694939ba45f3c0a1bff150ed\",\"vout\":0}] {\"data\":\"12345\"}"), runtime_error);
+    BOOST_CHECK_THROW(CallRPC("createrawtransaction [{\"txid\":\"a3b807410df0b60fcb9736768df5823938b2f838694939ba45f3c0a1bff150ed\",\"vout\":0}] {\"data\":\"12345g\"}"), runtime_error);
+
+    // Data 81 bytes long
+    BOOST_CHECK_NO_THROW(CallRPC("createrawtransaction [{\"txid\":\"a3b807410df0b60fcb9736768df5823938b2f838694939ba45f3c0a1bff150ed\",\"vout\":0}] {\"data\":\"010203040506070809101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081\"}"));
+}
+
 BOOST_AUTO_TEST_CASE(rpc_format_monetary_values)
 {
     BOOST_CHECK(ValueFromAmount(0LL).write() == "0.00000000");
diff --git a/src/test/rpc_wallet_tests.cpp b/src/test/rpc_wallet_tests.cpp
index 9368963ff2..52f41be8ae 100644
--- a/src/test/rpc_wallet_tests.cpp
+++ b/src/test/rpc_wallet_tests.cpp
@@ -27,8 +27,6 @@ BOOST_FIXTURE_TEST_SUITE(rpc_wallet_tests, TestingSetup)
 
 BOOST_AUTO_TEST_CASE(rpc_addmultisig)
 {
-    LOCK(pwalletMain->cs_wallet);
-
     rpcfn_type addmultisig = tableRPC["addmultisigaddress"]->actor;
 
     // old, 65-byte-long:
@@ -68,25 +66,28 @@ BOOST_AUTO_TEST_CASE(rpc_wallet)
 {
     // Test RPC calls for various wallet statistics
     UniValue r;
-
-    LOCK2(cs_main, pwalletMain->cs_wallet);
-
-    CPubKey demoPubkey = pwalletMain->GenerateNewKey();
-    CBitcoinAddress demoAddress = CBitcoinAddress(CTxDestination(demoPubkey.GetID()));
+    CPubKey demoPubkey;
+    CBitcoinAddress demoAddress;
     UniValue retValue;
     string strAccount = "walletDemoAccount";
-    string strPurpose = "receive";
-    BOOST_CHECK_NO_THROW({ /*Initialize Wallet with an account */
-        CWalletDB walletdb(pwalletMain->strWalletFile);
-        CAccount account;
-        account.vchPubKey = demoPubkey;
-        pwalletMain->SetAddressBook(account.vchPubKey.GetID(), strAccount, strPurpose);
-        walletdb.WriteAccount(strAccount, account);
-    });
-
-    CPubKey setaccountDemoPubkey = pwalletMain->GenerateNewKey();
-    CBitcoinAddress setaccountDemoAddress = CBitcoinAddress(CTxDestination(setaccountDemoPubkey.GetID()));
-
+    CBitcoinAddress setaccountDemoAddress;
+    {
+        LOCK(pwalletMain->cs_wallet);
+
+        demoPubkey = pwalletMain->GenerateNewKey();
+        demoAddress = CBitcoinAddress(CTxDestination(demoPubkey.GetID()));
+        string strPurpose = "receive";
+        BOOST_CHECK_NO_THROW({ /*Initialize Wallet with an account */
+            CWalletDB walletdb(pwalletMain->strWalletFile);
+            CAccount account;
+            account.vchPubKey = demoPubkey;
+            pwalletMain->SetAddressBook(account.vchPubKey.GetID(), strAccount, strPurpose);
+            walletdb.WriteAccount(strAccount, account);
+        });
+
+        CPubKey setaccountDemoPubkey = pwalletMain->GenerateNewKey();
+        setaccountDemoAddress = CBitcoinAddress(CTxDestination(setaccountDemoPubkey.GetID()));
+    }
     /*********************************
      * 			setaccount
      *********************************/
diff --git a/src/wallet/crypter.cpp b/src/wallet/crypter.cpp
index 0b0fb562e0..c86ad9758e 100644
--- a/src/wallet/crypter.cpp
+++ b/src/wallet/crypter.cpp
@@ -255,7 +255,7 @@ bool CCryptoKeyStore::GetPubKey(const CKeyID &address, CPubKey& vchPubKeyOut) co
     {
         LOCK(cs_KeyStore);
         if (!IsCrypted())
-            return CKeyStore::GetPubKey(address, vchPubKeyOut);
+            return CBasicKeyStore::GetPubKey(address, vchPubKeyOut);
 
         CryptedKeyMap::const_iterator mi = mapCryptedKeys.find(address);
         if (mi != mapCryptedKeys.end())
@@ -263,6 +263,8 @@ bool CCryptoKeyStore::GetPubKey(const CKeyID &address, CPubKey& vchPubKeyOut) co
             vchPubKeyOut = (*mi).second.first;
             return true;
         }
+        // Check for watch-only pubkeys
+        return CBasicKeyStore::GetPubKey(address, vchPubKeyOut);
     }
     return false;
 }
diff --git a/src/wallet/rpcdump.cpp b/src/wallet/rpcdump.cpp
index dbe36a2be1..8d557979c0 100644
--- a/src/wallet/rpcdump.cpp
+++ b/src/wallet/rpcdump.cpp
@@ -149,46 +149,124 @@ UniValue importprivkey(const UniValue& params, bool fHelp)
     return NullUniValue;
 }
 
+void ImportAddress(const CBitcoinAddress& address, const string& strLabel);
+void ImportScript(const CScript& script, const string& strLabel, bool isRedeemScript)
+{
+    if (!isRedeemScript && ::IsMine(*pwalletMain, script) == ISMINE_SPENDABLE)
+        throw JSONRPCError(RPC_WALLET_ERROR, "The wallet already contains the private key for this address or script");
+
+    pwalletMain->MarkDirty();
+
+    if (!pwalletMain->HaveWatchOnly(script) && !pwalletMain->AddWatchOnly(script))
+        throw JSONRPCError(RPC_WALLET_ERROR, "Error adding address to wallet");
+
+    if (isRedeemScript) {
+        if (!pwalletMain->HaveCScript(script) && !pwalletMain->AddCScript(script))
+            throw JSONRPCError(RPC_WALLET_ERROR, "Error adding p2sh redeemScript to wallet");
+        ImportAddress(CBitcoinAddress(CScriptID(script)), strLabel);
+    }
+}
+
+void ImportAddress(const CBitcoinAddress& address, const string& strLabel)
+{
+    CScript script = GetScriptForDestination(address.Get());
+    ImportScript(script, strLabel, false);
+    // add to address book or update label
+    if (address.IsValid())
+        pwalletMain->SetAddressBook(address.Get(), strLabel, "receive");
+}
+
 UniValue importaddress(const UniValue& params, bool fHelp)
 {
     if (!EnsureWalletIsAvailable(fHelp))
         return NullUniValue;
     
-    if (fHelp || params.size() < 1 || params.size() > 3)
+    if (fHelp || params.size() < 1 || params.size() > 4)
         throw runtime_error(
-            "importaddress \"address\" ( \"label\" rescan )\n"
-            "\nAdds an address or script (in hex) that can be watched as if it were in your wallet but cannot be used to spend.\n"
+            "importaddress \"address\" ( \"label\" rescan p2sh )\n"
+            "\nAdds a script (in hex) or address that can be watched as if it were in your wallet but cannot be used to spend.\n"
             "\nArguments:\n"
-            "1. \"address\"          (string, required) The address\n"
+            "1. \"script\"           (string, required) The hex-encoded script (or address)\n"
             "2. \"label\"            (string, optional, default=\"\") An optional label\n"
             "3. rescan               (boolean, optional, default=true) Rescan the wallet for transactions\n"
+            "4. p2sh                 (boolean, optional, default=false) Add the P2SH version of the script as well\n"
             "\nNote: This call can take minutes to complete if rescan is true.\n"
+            "If you have the full public key, you should call importpublickey instead of this.\n"
             "\nExamples:\n"
-            "\nImport an address with rescan\n"
-            + HelpExampleCli("importaddress", "\"myaddress\"") +
+            "\nImport a script with rescan\n"
+            + HelpExampleCli("importaddress", "\"myscript\"") +
             "\nImport using a label without rescan\n"
-            + HelpExampleCli("importaddress", "\"myaddress\" \"testing\" false") +
+            + HelpExampleCli("importaddress", "\"myscript\" \"testing\" false") +
             "\nAs a JSON-RPC call\n"
-            + HelpExampleRpc("importaddress", "\"myaddress\", \"testing\", false")
+            + HelpExampleRpc("importaddress", "\"myscript\", \"testing\", false")
         );
 
     if (fPruneMode)
         throw JSONRPCError(RPC_WALLET_ERROR, "Importing addresses is disabled in pruned mode");
 
-    LOCK2(cs_main, pwalletMain->cs_wallet);
+    string strLabel = "";
+    if (params.size() > 1)
+        strLabel = params[1].get_str();
+
+    // Whether to perform rescan after import
+    bool fRescan = true;
+    if (params.size() > 2)
+        fRescan = params[2].get_bool();
 
-    CScript script;
+    // Whether to import a p2sh version, too
+    bool fP2SH = false;
+    if (params.size() > 3)
+        fP2SH = params[3].get_bool();
+
+    LOCK2(cs_main, pwalletMain->cs_wallet);
 
     CBitcoinAddress address(params[0].get_str());
     if (address.IsValid()) {
-        script = GetScriptForDestination(address.Get());
+        if (fP2SH)
+            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Cannot use the p2sh flag with an address - use a script instead");
+        ImportAddress(address, strLabel);
     } else if (IsHex(params[0].get_str())) {
         std::vector<unsigned char> data(ParseHex(params[0].get_str()));
-        script = CScript(data.begin(), data.end());
+        ImportScript(CScript(data.begin(), data.end()), strLabel, fP2SH);
     } else {
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Bitcoin address or script");
     }
 
+    if (fRescan)
+    {
+        pwalletMain->ScanForWalletTransactions(chainActive.Genesis(), true);
+        pwalletMain->ReacceptWalletTransactions();
+    }
+
+    return NullUniValue;
+}
+
+UniValue importpubkey(const UniValue& params, bool fHelp)
+{
+    if (!EnsureWalletIsAvailable(fHelp))
+        return NullUniValue;
+
+    if (fHelp || params.size() < 1 || params.size() > 4)
+        throw runtime_error(
+            "importpubkey \"pubkey\" ( \"label\" rescan )\n"
+            "\nAdds a public key (in hex) that can be watched as if it were in your wallet but cannot be used to spend.\n"
+            "\nArguments:\n"
+            "1. \"pubkey\"           (string, required) The hex-encoded public key\n"
+            "2. \"label\"            (string, optional, default=\"\") An optional label\n"
+            "3. rescan               (boolean, optional, default=true) Rescan the wallet for transactions\n"
+            "\nNote: This call can take minutes to complete if rescan is true.\n"
+            "\nExamples:\n"
+            "\nImport a public key with rescan\n"
+            + HelpExampleCli("importpubkey", "\"mypubkey\"") +
+            "\nImport using a label without rescan\n"
+            + HelpExampleCli("importpubkey", "\"mypubkey\" \"testing\" false") +
+            "\nAs a JSON-RPC call\n"
+            + HelpExampleRpc("importpubkey", "\"mypubkey\", \"testing\", false")
+        );
+
+    if (fPruneMode)
+        throw JSONRPCError(RPC_WALLET_ERROR, "Importing public keys is disabled in pruned mode");
+
     string strLabel = "";
     if (params.size() > 1)
         strLabel = params[1].get_str();
@@ -198,33 +276,28 @@ UniValue importaddress(const UniValue& params, bool fHelp)
     if (params.size() > 2)
         fRescan = params[2].get_bool();
 
-    {
-        if (::IsMine(*pwalletMain, script) == ISMINE_SPENDABLE)
-            throw JSONRPCError(RPC_WALLET_ERROR, "The wallet already contains the private key for this address or script");
-
-        // add to address book or update label
-        if (address.IsValid())
-            pwalletMain->SetAddressBook(address.Get(), strLabel, "receive");
-
-        // Don't throw error in case an address is already there
-        if (pwalletMain->HaveWatchOnly(script))
-            return NullUniValue;
+    if (!IsHex(params[0].get_str()))
+        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Pubkey must be a hex string");
+    std::vector<unsigned char> data(ParseHex(params[0].get_str()));
+    CPubKey pubKey(data.begin(), data.end());
+    if (!pubKey.IsFullyValid())
+        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Pubkey is not a valid public key");
 
-        pwalletMain->MarkDirty();
+    LOCK2(cs_main, pwalletMain->cs_wallet);
 
-        if (!pwalletMain->AddWatchOnly(script))
-            throw JSONRPCError(RPC_WALLET_ERROR, "Error adding address to wallet");
+    ImportAddress(CBitcoinAddress(pubKey.GetID()), strLabel);
+    ImportScript(GetScriptForRawPubKey(pubKey), strLabel, false);
 
-        if (fRescan)
-        {
-            pwalletMain->ScanForWalletTransactions(chainActive.Genesis(), true);
-            pwalletMain->ReacceptWalletTransactions();
-        }
+    if (fRescan)
+    {
+        pwalletMain->ScanForWalletTransactions(chainActive.Genesis(), true);
+        pwalletMain->ReacceptWalletTransactions();
     }
 
     return NullUniValue;
 }
 
+
 UniValue importwallet(const UniValue& params, bool fHelp)
 {
     if (!EnsureWalletIsAvailable(fHelp))
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index ce547f5753..5d182f3d42 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -2368,15 +2368,20 @@ UniValue fundrawtransaction(const UniValue& params, bool fHelp)
     if (!EnsureWalletIsAvailable(fHelp))
         return NullUniValue;
 
-    if (fHelp || params.size() != 1)
+    if (fHelp || params.size() < 1 || params.size() > 2)
         throw runtime_error(
-                            "fundrawtransaction \"hexstring\"\n"
+                            "fundrawtransaction \"hexstring\" includeWatching\n"
                             "\nAdd inputs to a transaction until it has enough in value to meet its out value.\n"
                             "This will not modify existing inputs, and will add one change output to the outputs.\n"
                             "Note that inputs which were signed may need to be resigned after completion since in/outputs have been added.\n"
                             "The inputs added will not be signed, use signrawtransaction for that.\n"
+                            "Note that all existing inputs must have their previous output transaction be in the wallet.\n"
+                            "Note that all inputs selected must be of standard form and P2SH scripts must be"
+                            "in the wallet using importaddress or addmultisigaddress (to calculate fees).\n"
+                            "Only pay-to-pubkey, multisig, and P2SH versions thereof are currently supported for watch-only\n"
                             "\nArguments:\n"
-                            "1. \"hexstring\"    (string, required) The hex string of the raw transaction\n"
+                            "1. \"hexstring\"     (string, required) The hex string of the raw transaction\n"
+                            "2. includeWatching (boolean, optional, default false) Also select inputs which are watch only\n"
                             "\nResult:\n"
                             "{\n"
                             "  \"hex\":       \"value\", (string)  The resulting raw transaction (hex-encoded string)\n"
@@ -2395,18 +2400,22 @@ UniValue fundrawtransaction(const UniValue& params, bool fHelp)
                             + HelpExampleCli("sendrawtransaction", "\"signedtransactionhex\"")
                             );
 
-    RPCTypeCheck(params, boost::assign::list_of(UniValue::VSTR));
+    RPCTypeCheck(params, boost::assign::list_of(UniValue::VSTR)(UniValue::VBOOL));
 
     // parse hex string from parameter
     CTransaction origTx;
     if (!DecodeHexTx(origTx, params[0].get_str()))
         throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");
 
+    bool includeWatching = false;
+    if (params.size() > 1)
+        includeWatching = true;
+
     CMutableTransaction tx(origTx);
     CAmount nFee;
     string strFailReason;
     int nChangePos = -1;
-    if(!pwalletMain->FundTransaction(tx, nFee, nChangePos, strFailReason))
+    if(!pwalletMain->FundTransaction(tx, nFee, nChangePos, strFailReason, includeWatching))
         throw JSONRPCError(RPC_INTERNAL_ERROR, strFailReason);
 
     UniValue result(UniValue::VOBJ);
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index dcc2983139..c3b1172201 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -114,6 +114,9 @@ bool CWallet::AddKeyPubKey(const CKey& secret, const CPubKey &pubkey)
     script = GetScriptForDestination(pubkey.GetID());
     if (HaveWatchOnly(script))
         RemoveWatchOnly(script);
+    script = GetScriptForRawPubKey(pubkey);
+    if (HaveWatchOnly(script))
+        RemoveWatchOnly(script);
 
     if (!fFileBacked)
         return true;
@@ -1527,7 +1530,9 @@ void CWallet::AvailableCoins(vector<COutput>& vCoins, bool fOnlyConfirmed, const
                 if (!(IsSpent(wtxid, i)) && mine != ISMINE_NO &&
                     !IsLockedCoin((*it).first, i) && (pcoin->vout[i].nValue > 0 || fIncludeZeroValue) &&
                     (!coinControl || !coinControl->HasSelected() || coinControl->fAllowOtherInputs || coinControl->IsSelected((*it).first, i)))
-                        vCoins.push_back(COutput(pcoin, i, nDepth, (mine & ISMINE_SPENDABLE) != ISMINE_NO));
+                        vCoins.push_back(COutput(pcoin, i, nDepth,
+                                                 ((mine & ISMINE_SPENDABLE) != ISMINE_NO) ||
+                                                  (coinControl && coinControl->fAllowWatchOnly && (mine & ISMINE_WATCH_SOLVABLE) != ISMINE_NO)));
             }
         }
     }
@@ -1743,7 +1748,7 @@ bool CWallet::SelectCoins(const CAmount& nTargetValue, set<pair<const CWalletTx*
     return res;
 }
 
-bool CWallet::FundTransaction(CMutableTransaction& tx, CAmount &nFeeRet, int& nChangePosRet, std::string& strFailReason)
+bool CWallet::FundTransaction(CMutableTransaction& tx, CAmount &nFeeRet, int& nChangePosRet, std::string& strFailReason, bool includeWatching)
 {
     vector<CRecipient> vecSend;
 
@@ -1756,6 +1761,7 @@ bool CWallet::FundTransaction(CMutableTransaction& tx, CAmount &nFeeRet, int& nC
 
     CCoinControl coinControl;
     coinControl.fAllowOtherInputs = true;
+    coinControl.fAllowWatchOnly = includeWatching;
     BOOST_FOREACH(const CTxIn& txin, tx.vin)
         coinControl.Select(txin.prevout);
 
diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
index ae007e4673..bd30b67b09 100644
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -627,7 +627,7 @@ public:
     CAmount GetWatchOnlyBalance() const;
     CAmount GetUnconfirmedWatchOnlyBalance() const;
     CAmount GetImmatureWatchOnlyBalance() const;
-    bool FundTransaction(CMutableTransaction& tx, CAmount& nFeeRet, int& nChangePosRet, std::string& strFailReason);
+    bool FundTransaction(CMutableTransaction& tx, CAmount& nFeeRet, int& nChangePosRet, std::string& strFailReason, bool includeWatching);
     bool CreateTransaction(const std::vector<CRecipient>& vecSend, CWalletTx& wtxNew, CReserveKey& reservekey, CAmount& nFeeRet, int& nChangePosRet,
                            std::string& strFailReason, const CCoinControl *coinControl = NULL, bool sign = true);
     bool CommitTransaction(CWalletTx& wtxNew, CReserveKey& reservekey);
diff --git a/src/wallet/wallet_ismine.cpp b/src/wallet/wallet_ismine.cpp
index 5482348e35..d27b1531e3 100644
--- a/src/wallet/wallet_ismine.cpp
+++ b/src/wallet/wallet_ismine.cpp
@@ -9,6 +9,7 @@
 #include "keystore.h"
 #include "script/script.h"
 #include "script/standard.h"
+#include "script/sign.h"
 
 #include <boost/foreach.hpp>
 
@@ -40,7 +41,7 @@ isminetype IsMine(const CKeyStore &keystore, const CScript& scriptPubKey)
     txnouttype whichType;
     if (!Solver(scriptPubKey, whichType, vSolutions)) {
         if (keystore.HaveWatchOnly(scriptPubKey))
-            return ISMINE_WATCH_ONLY;
+            return ISMINE_WATCH_UNSOLVABLE;
         return ISMINE_NO;
     }
 
@@ -85,7 +86,10 @@ isminetype IsMine(const CKeyStore &keystore, const CScript& scriptPubKey)
     }
     }
 
-    if (keystore.HaveWatchOnly(scriptPubKey))
-        return ISMINE_WATCH_ONLY;
+    if (keystore.HaveWatchOnly(scriptPubKey)) {
+        // TODO: This could be optimized some by doing some work after the above solver
+        CScript scriptSig;
+        return ProduceSignature(DummySignatureCreator(&keystore), scriptPubKey, scriptSig) ? ISMINE_WATCH_SOLVABLE : ISMINE_WATCH_UNSOLVABLE;
+    }
     return ISMINE_NO;
 }
diff --git a/src/wallet/wallet_ismine.h b/src/wallet/wallet_ismine.h
index 7846565f8d..9f45f76c6b 100644
--- a/src/wallet/wallet_ismine.h
+++ b/src/wallet/wallet_ismine.h
@@ -17,8 +17,12 @@ class CScript;
 enum isminetype
 {
     ISMINE_NO = 0,
-    ISMINE_WATCH_ONLY = 1,
-    ISMINE_SPENDABLE = 2,
+    //! Indicates that we dont know how to create a scriptSig that would solve this if we were given the appropriate private keys
+    ISMINE_WATCH_UNSOLVABLE = 1,
+    //! Indicates that we know how to create a scriptSig that would solve this if we were given the appropriate private keys
+    ISMINE_WATCH_SOLVABLE = 2,
+    ISMINE_WATCH_ONLY = ISMINE_WATCH_SOLVABLE | ISMINE_WATCH_UNSOLVABLE,
+    ISMINE_SPENDABLE = 4,
     ISMINE_ALL = ISMINE_WATCH_ONLY | ISMINE_SPENDABLE
 };
 /** used for bitflags of isminetype */