diff --git a/src/dash-cli.cpp b/src/dash-cli.cpp
index bffd94d05..c148cd786 100644
--- a/src/dash-cli.cpp
+++ b/src/dash-cli.cpp
@@ -25,15 +25,13 @@
 
 #include <univalue.h>
 
-using namespace std;
-
 static const char DEFAULT_RPCCONNECT[] = "127.0.0.1";
 static const int DEFAULT_HTTP_CLIENT_TIMEOUT=900;
 static const int CONTINUE_EXECUTION=-1;
 
 std::string HelpMessageCli()
 {
-    string strUsage;
+    std::string strUsage;
     strUsage += HelpMessageGroup(_("Options:"));
     strUsage += HelpMessageOpt("-?", _("This help message"));
     strUsage += HelpMessageOpt("-conf=<file>", strprintf(_("Specify configuration file (default: %s)"), BITCOIN_CONF_FILENAME));
@@ -193,7 +191,7 @@ static void http_error_cb(enum evhttp_request_error err, void *ctx)
 }
 #endif
 
-UniValue CallRPC(const string& strMethod, const UniValue& params)
+UniValue CallRPC(const std::string& strMethod, const UniValue& params)
 {
     std::string host = GetArg("-rpcconnect", DEFAULT_RPCCONNECT);
     int port = GetArg("-rpcport", BaseParams().RPCPort());
@@ -201,18 +199,18 @@ UniValue CallRPC(const string& strMethod, const UniValue& params)
     // Create event base
     struct event_base *base = event_base_new(); // TODO RAII
     if (!base)
-        throw runtime_error("cannot create event_base");
+        throw std::runtime_error("cannot create event_base");
 
     // Synchronously look up hostname
     struct evhttp_connection *evcon = evhttp_connection_base_new(base, NULL, host.c_str(), port); // TODO RAII
     if (evcon == NULL)
-        throw runtime_error("create connection failed");
+        throw std::runtime_error("create connection failed");
     evhttp_connection_set_timeout(evcon, GetArg("-rpcclienttimeout", DEFAULT_HTTP_CLIENT_TIMEOUT));
 
     HTTPReply response;
     struct evhttp_request *req = evhttp_request_new(http_request_done, (void*)&response); // TODO RAII
     if (req == NULL)
-        throw runtime_error("create http request failed");
+        throw std::runtime_error("create http request failed");
 #if LIBEVENT_VERSION_NUMBER >= 0x02010300
     evhttp_request_set_error_cb(req, http_error_cb);
 #endif
@@ -222,7 +220,7 @@ UniValue CallRPC(const string& strMethod, const UniValue& params)
     if (mapArgs["-rpcpassword"] == "") {
         // Try fall back to cookie-based authentication if no password is provided
         if (!GetAuthCookie(&strRPCUserColonPass)) {
-            throw runtime_error(strprintf(
+            throw std::runtime_error(strprintf(
                 _("Could not locate RPC credentials. No authentication cookie could be found, and no rpcpassword is set in the configuration file (%s)"),
                     GetConfigFile(GetArg("-conf", BITCOIN_CONF_FILENAME)).string().c_str()));
 
@@ -257,26 +255,26 @@ UniValue CallRPC(const string& strMethod, const UniValue& params)
     if (response.status == 0)
         throw CConnectionFailed(strprintf("couldn't connect to server\n(make sure server is running and you are connecting to the correct RPC port: %d %s)", response.error, http_errorstring(response.error)));
     else if (response.status == HTTP_UNAUTHORIZED)
-        throw runtime_error("incorrect rpcuser or rpcpassword (authorization failed)");
+        throw std::runtime_error("incorrect rpcuser or rpcpassword (authorization failed)");
     else if (response.status >= 400 && response.status != HTTP_BAD_REQUEST && response.status != HTTP_NOT_FOUND && response.status != HTTP_INTERNAL_SERVER_ERROR)
-        throw runtime_error(strprintf("server returned HTTP error %d", response.status));
+        throw std::runtime_error(strprintf("server returned HTTP error %d", response.status));
     else if (response.body.empty())
-        throw runtime_error("no response from server");
+        throw std::runtime_error("no response from server");
 
     // Parse reply
     UniValue valReply(UniValue::VSTR);
     if (!valReply.read(response.body))
-        throw runtime_error("couldn't parse reply from server");
+        throw std::runtime_error("couldn't parse reply from server");
     const UniValue& reply = valReply.get_obj();
     if (reply.empty())
-        throw runtime_error("expected reply to have result, error and id properties");
+        throw std::runtime_error("expected reply to have result, error and id properties");
 
     return reply;
 }
 
 int CommandLineRPC(int argc, char *argv[])
 {
-    string strPrint;
+    std::string strPrint;
     int nRet = 0;
     try {
         // Skip switches
@@ -292,7 +290,7 @@ int CommandLineRPC(int argc, char *argv[])
                 args.push_back(line);
         }
         if (args.size() < 1)
-            throw runtime_error("too few parameters (need at least command)");
+            throw std::runtime_error("too few parameters (need at least command)");
         std::string strMethod = args[0];
         UniValue params = RPCConvertValues(strMethod, std::vector<std::string>(args.begin()+1, args.end()));
 
@@ -346,7 +344,7 @@ int CommandLineRPC(int argc, char *argv[])
         throw;
     }
     catch (const std::exception& e) {
-        strPrint = string("error: ") + e.what();
+        strPrint = std::string("error: ") + e.what();
         nRet = EXIT_FAILURE;
     }
     catch (...) {
diff --git a/src/dash-tx.cpp b/src/dash-tx.cpp
index 8fd5f86e1..a770f0e34 100644
--- a/src/dash-tx.cpp
+++ b/src/dash-tx.cpp
@@ -26,10 +26,8 @@
 #include <boost/algorithm/string.hpp>
 #include <boost/assign/list_of.hpp>
 
-using namespace std;
-
 static bool fCreateBlank;
-static map<string,UniValue> registers;
+static std::map<std::string,UniValue> registers;
 static const int CONTINUE_EXECUTION=-1;
 
 //
@@ -103,52 +101,52 @@ static int AppInitRawTx(int argc, char* argv[])
     return CONTINUE_EXECUTION;
 }
 
-static void RegisterSetJson(const string& key, const string& rawJson)
+static void RegisterSetJson(const std::string& key, const std::string& rawJson)
 {
     UniValue val;
     if (!val.read(rawJson)) {
-        string strErr = "Cannot parse JSON for key " + key;
-        throw runtime_error(strErr);
+        std::string strErr = "Cannot parse JSON for key " + key;
+        throw std::runtime_error(strErr);
     }
 
     registers[key] = val;
 }
 
-static void RegisterSet(const string& strInput)
+static void RegisterSet(const std::string& strInput)
 {
     // separate NAME:VALUE in string
     size_t pos = strInput.find(':');
-    if ((pos == string::npos) ||
+    if ((pos == std::string::npos) ||
         (pos == 0) ||
         (pos == (strInput.size() - 1)))
-        throw runtime_error("Register input requires NAME:VALUE");
+        throw std::runtime_error("Register input requires NAME:VALUE");
 
-    string key = strInput.substr(0, pos);
-    string valStr = strInput.substr(pos + 1, string::npos);
+    std::string key = strInput.substr(0, pos);
+    std::string valStr = strInput.substr(pos + 1, std::string::npos);
 
     RegisterSetJson(key, valStr);
 }
 
-static void RegisterLoad(const string& strInput)
+static void RegisterLoad(const std::string& strInput)
 {
     // separate NAME:FILENAME in string
     size_t pos = strInput.find(':');
-    if ((pos == string::npos) ||
+    if ((pos == std::string::npos) ||
         (pos == 0) ||
         (pos == (strInput.size() - 1)))
-        throw runtime_error("Register load requires NAME:FILENAME");
+        throw std::runtime_error("Register load requires NAME:FILENAME");
 
-    string key = strInput.substr(0, pos);
-    string filename = strInput.substr(pos + 1, string::npos);
+    std::string key = strInput.substr(0, pos);
+    std::string filename = strInput.substr(pos + 1, std::string::npos);
 
     FILE *f = fopen(filename.c_str(), "r");
     if (!f) {
-        string strErr = "Cannot open file " + filename;
-        throw runtime_error(strErr);
+        std::string strErr = "Cannot open file " + filename;
+        throw std::runtime_error(strErr);
     }
 
     // load file chunks into one big buffer
-    string valStr;
+    std::string valStr;
     while ((!feof(f)) && (!ferror(f))) {
         char buf[4096];
         int bread = fread(buf, 1, sizeof(buf), f);
@@ -162,55 +160,55 @@ static void RegisterLoad(const string& strInput)
     fclose(f);
 
     if (error) {
-        string strErr = "Error reading file " + filename;
-        throw runtime_error(strErr);
+        std::string strErr = "Error reading file " + filename;
+        throw std::runtime_error(strErr);
     }
 
     // evaluate as JSON buffer register
     RegisterSetJson(key, valStr);
 }
 
-static void MutateTxVersion(CMutableTransaction& tx, const string& cmdVal)
+static void MutateTxVersion(CMutableTransaction& tx, const std::string& cmdVal)
 {
     int64_t newVersion = atoi64(cmdVal);
     if (newVersion < 1 || newVersion > CTransaction::MAX_STANDARD_VERSION)
-        throw runtime_error("Invalid TX version requested");
+        throw std::runtime_error("Invalid TX version requested");
 
     tx.nVersion = (int) newVersion;
 }
 
-static void MutateTxLocktime(CMutableTransaction& tx, const string& cmdVal)
+static void MutateTxLocktime(CMutableTransaction& tx, const std::string& cmdVal)
 {
     int64_t newLocktime = atoi64(cmdVal);
     if (newLocktime < 0LL || newLocktime > 0xffffffffLL)
-        throw runtime_error("Invalid TX locktime requested");
+        throw std::runtime_error("Invalid TX locktime requested");
 
     tx.nLockTime = (unsigned int) newLocktime;
 }
 
-static void MutateTxAddInput(CMutableTransaction& tx, const string& strInput)
+static void MutateTxAddInput(CMutableTransaction& tx, const std::string& strInput)
 {
     std::vector<std::string> vStrInputParts;
     boost::split(vStrInputParts, strInput, boost::is_any_of(":"));
 
     // separate TXID:VOUT in string
     if (vStrInputParts.size()<2)
-        throw runtime_error("TX input missing separator");
+        throw std::runtime_error("TX input missing separator");
 
     // extract and validate TXID
-    string strTxid = vStrInputParts[0];
+    std::string strTxid = vStrInputParts[0];
     if ((strTxid.size() != 64) || !IsHex(strTxid))
-        throw runtime_error("invalid TX input txid");
+        throw std::runtime_error("invalid TX input txid");
     uint256 txid(uint256S(strTxid));
 
     static const unsigned int minTxOutSz = 9;
     static const unsigned int maxVout = MaxBlockSize(true) / minTxOutSz;
 
     // extract and validate vout
-    string strVout = vStrInputParts[1];
+    std::string strVout = vStrInputParts[1];
     int vout = atoi(strVout);
     if ((vout < 0) || (vout > (int)maxVout))
-        throw runtime_error("invalid TX input vout");
+        throw std::runtime_error("invalid TX input vout");
 
     // extract the optional sequence number
     uint32_t nSequenceIn=std::numeric_limits<unsigned int>::max();
@@ -222,26 +220,26 @@ static void MutateTxAddInput(CMutableTransaction& tx, const string& strInput)
     tx.vin.push_back(txin);
 }
 
-static void MutateTxAddOutAddr(CMutableTransaction& tx, const string& strInput)
+static void MutateTxAddOutAddr(CMutableTransaction& tx, const std::string& strInput)
 {
     // separate VALUE:ADDRESS in string
     size_t pos = strInput.find(':');
-    if ((pos == string::npos) ||
+    if ((pos == std::string::npos) ||
         (pos == 0) ||
         (pos == (strInput.size() - 1)))
-        throw runtime_error("TX output missing separator");
+        throw std::runtime_error("TX output missing separator");
 
     // extract and validate VALUE
-    string strValue = strInput.substr(0, pos);
+    std::string strValue = strInput.substr(0, pos);
     CAmount value;
     if (!ParseMoney(strValue, value))
-        throw runtime_error("invalid TX output value");
+        throw std::runtime_error("invalid TX output value");
 
     // extract and validate ADDRESS
-    string strAddr = strInput.substr(pos + 1, string::npos);
+    std::string strAddr = strInput.substr(pos + 1, std::string::npos);
     CBitcoinAddress addr(strAddr);
     if (!addr.IsValid())
-        throw runtime_error("invalid TX output address");
+        throw std::runtime_error("invalid TX output address");
 
     // build standard output script via GetScriptForDestination()
     CScript scriptPubKey = GetScriptForDestination(addr.Get());
@@ -251,7 +249,7 @@ static void MutateTxAddOutAddr(CMutableTransaction& tx, const string& strInput)
     tx.vout.push_back(txout);
 }
 
-static void MutateTxAddOutData(CMutableTransaction& tx, const string& strInput)
+static void MutateTxAddOutData(CMutableTransaction& tx, const std::string& strInput)
 {
     CAmount value = 0;
 
@@ -259,20 +257,20 @@ static void MutateTxAddOutData(CMutableTransaction& tx, const string& strInput)
     size_t pos = strInput.find(':');
 
     if (pos==0)
-        throw runtime_error("TX output value not specified");
+        throw std::runtime_error("TX output value not specified");
 
-    if (pos != string::npos) {
+    if (pos != std::string::npos) {
         // extract and validate VALUE
-        string strValue = strInput.substr(0, pos);
+        std::string strValue = strInput.substr(0, pos);
         if (!ParseMoney(strValue, value))
-            throw runtime_error("invalid TX output value");
+            throw std::runtime_error("invalid TX output value");
     }
 
     // extract and validate DATA
-    string strData = strInput.substr(pos + 1, string::npos);
+    std::string strData = strInput.substr(pos + 1, std::string::npos);
 
     if (!IsHex(strData))
-        throw runtime_error("invalid TX output data");
+        throw std::runtime_error("invalid TX output data");
 
     std::vector<unsigned char> data = ParseHex(strData);
 
@@ -280,22 +278,22 @@ static void MutateTxAddOutData(CMutableTransaction& tx, const string& strInput)
     tx.vout.push_back(txout);
 }
 
-static void MutateTxAddOutScript(CMutableTransaction& tx, const string& strInput)
+static void MutateTxAddOutScript(CMutableTransaction& tx, const std::string& strInput)
 {
     // separate VALUE:SCRIPT in string
     size_t pos = strInput.find(':');
-    if ((pos == string::npos) ||
+    if ((pos == std::string::npos) ||
         (pos == 0))
-        throw runtime_error("TX output missing separator");
+        throw std::runtime_error("TX output missing separator");
 
     // extract and validate VALUE
-    string strValue = strInput.substr(0, pos);
+    std::string strValue = strInput.substr(0, pos);
     CAmount value;
     if (!ParseMoney(strValue, value))
-        throw runtime_error("invalid TX output value");
+        throw std::runtime_error("invalid TX output value");
 
     // extract and validate script
-    string strScript = strInput.substr(pos + 1, string::npos);
+    std::string strScript = strInput.substr(pos + 1, std::string::npos);
     CScript scriptPubKey = ParseScript(strScript); // throws on err
 
     // construct TxOut, append to transaction output list
@@ -303,26 +301,26 @@ static void MutateTxAddOutScript(CMutableTransaction& tx, const string& strInput
     tx.vout.push_back(txout);
 }
 
-static void MutateTxDelInput(CMutableTransaction& tx, const string& strInIdx)
+static void MutateTxDelInput(CMutableTransaction& tx, const std::string& strInIdx)
 {
     // parse requested deletion index
     int inIdx = atoi(strInIdx);
     if (inIdx < 0 || inIdx >= (int)tx.vin.size()) {
-        string strErr = "Invalid TX input index '" + strInIdx + "'";
-        throw runtime_error(strErr.c_str());
+        std::string strErr = "Invalid TX input index '" + strInIdx + "'";
+        throw std::runtime_error(strErr.c_str());
     }
 
     // delete input from transaction
     tx.vin.erase(tx.vin.begin() + inIdx);
 }
 
-static void MutateTxDelOutput(CMutableTransaction& tx, const string& strOutIdx)
+static void MutateTxDelOutput(CMutableTransaction& tx, const std::string& strOutIdx)
 {
     // parse requested deletion index
     int outIdx = atoi(strOutIdx);
     if (outIdx < 0 || outIdx >= (int)tx.vout.size()) {
-        string strErr = "Invalid TX output index '" + strOutIdx + "'";
-        throw runtime_error(strErr.c_str());
+        std::string strErr = "Invalid TX output index '" + strOutIdx + "'";
+        throw std::runtime_error(strErr.c_str());
     }
 
     // delete output from transaction
@@ -342,7 +340,7 @@ static const struct {
     {"SINGLE|ANYONECANPAY", SIGHASH_SINGLE|SIGHASH_ANYONECANPAY},
 };
 
-static bool findSighashFlags(int& flags, const string& flagStr)
+static bool findSighashFlags(int& flags, const std::string& flagStr)
 {
     flags = 0;
 
@@ -356,31 +354,31 @@ static bool findSighashFlags(int& flags, const string& flagStr)
     return false;
 }
 
-uint256 ParseHashUO(map<string,UniValue>& o, string strKey)
+uint256 ParseHashUO(std::map<std::string,UniValue>& o, std::string strKey)
 {
     if (!o.count(strKey))
         return uint256();
     return ParseHashUV(o[strKey], strKey);
 }
 
-vector<unsigned char> ParseHexUO(map<string,UniValue>& o, string strKey)
+std::vector<unsigned char> ParseHexUO(std::map<std::string,UniValue>& o, std::string strKey)
 {
     if (!o.count(strKey)) {
-        vector<unsigned char> emptyVec;
+        std::vector<unsigned char> emptyVec;
         return emptyVec;
     }
     return ParseHexUV(o[strKey], strKey);
 }
 
-static void MutateTxSign(CMutableTransaction& tx, const string& flagStr)
+static void MutateTxSign(CMutableTransaction& tx, const std::string& flagStr)
 {
     int nHashType = SIGHASH_ALL;
 
     if (flagStr.size() > 0)
         if (!findSighashFlags(nHashType, flagStr))
-            throw runtime_error("unknown sighash flag/sign option");
+            throw std::runtime_error("unknown sighash flag/sign option");
 
-    vector<CTransaction> txVariants;
+    std::vector<CTransaction> txVariants;
     txVariants.push_back(tx);
 
     // mergedTx will end up with all the signatures; it
@@ -391,17 +389,17 @@ static void MutateTxSign(CMutableTransaction& tx, const string& flagStr)
     CCoinsViewCache view(&viewDummy);
 
     if (!registers.count("privatekeys"))
-        throw runtime_error("privatekeys register variable must be set.");
+        throw std::runtime_error("privatekeys register variable must be set.");
     CBasicKeyStore tempKeystore;
     UniValue keysObj = registers["privatekeys"];
 
     for (unsigned int kidx = 0; kidx < keysObj.size(); kidx++) {
         if (!keysObj[kidx].isStr())
-            throw runtime_error("privatekey not a string");
+            throw std::runtime_error("privatekey not a std::string");
         CBitcoinSecret vchSecret;
         bool fGood = vchSecret.SetString(keysObj[kidx].getValStr());
         if (!fGood)
-            throw runtime_error("privatekey not valid");
+            throw std::runtime_error("privatekey not valid");
 
         CKey key = vchSecret.GetKey();
         tempKeystore.AddKey(key);
@@ -409,35 +407,35 @@ static void MutateTxSign(CMutableTransaction& tx, const string& flagStr)
 
     // Add previous txouts given in the RPC call:
     if (!registers.count("prevtxs"))
-        throw runtime_error("prevtxs register variable must be set.");
+        throw std::runtime_error("prevtxs register variable must be set.");
     UniValue prevtxsObj = registers["prevtxs"];
     {
         for (unsigned int previdx = 0; previdx < prevtxsObj.size(); previdx++) {
             UniValue prevOut = prevtxsObj[previdx];
             if (!prevOut.isObject())
-                throw runtime_error("expected prevtxs internal object");
+                throw std::runtime_error("expected prevtxs internal object");
 
-            map<string,UniValue::VType> types = boost::assign::map_list_of("txid", UniValue::VSTR)("vout",UniValue::VNUM)("scriptPubKey",UniValue::VSTR);
+            std::map<std::string,UniValue::VType> types = boost::assign::map_list_of("txid", UniValue::VSTR)("vout",UniValue::VNUM)("scriptPubKey",UniValue::VSTR);
             if (!prevOut.checkObject(types))
-                throw runtime_error("prevtxs internal object typecheck fail");
+                throw std::runtime_error("prevtxs internal object typecheck fail");
 
             uint256 txid = ParseHashUV(prevOut["txid"], "txid");
 
             int nOut = atoi(prevOut["vout"].getValStr());
             if (nOut < 0)
-                throw runtime_error("vout must be positive");
+                throw std::runtime_error("vout must be positive");
 
             COutPoint out(txid, nOut);
-            vector<unsigned char> pkData(ParseHexUV(prevOut["scriptPubKey"], "scriptPubKey"));
+            std::vector<unsigned char> pkData(ParseHexUV(prevOut["scriptPubKey"], "scriptPubKey"));
             CScript scriptPubKey(pkData.begin(), pkData.end());
 
             {
                 const Coin& coin = view.AccessCoin(out);
                 if (!coin.IsSpent() && coin.out.scriptPubKey != scriptPubKey) {
-                    string err("Previous output scriptPubKey mismatch:\n");
+                    std::string err("Previous output scriptPubKey mismatch:\n");
                     err = err + ScriptToAsmStr(coin.out.scriptPubKey) + "\nvs:\n"+
                         ScriptToAsmStr(scriptPubKey);
-                    throw runtime_error(err);
+                    throw std::runtime_error(err);
                 }
                 Coin newcoin;
                 newcoin.out.scriptPubKey = scriptPubKey;
@@ -451,7 +449,7 @@ static void MutateTxSign(CMutableTransaction& tx, const string& flagStr)
             if (scriptPubKey.IsPayToScriptHash() &&
                 prevOut.exists("redeemScript")) {
                 UniValue v = prevOut["redeemScript"];
-                vector<unsigned char> rsData(ParseHexUV(v, "redeemScript"));
+                std::vector<unsigned char> rsData(ParseHexUV(v, "redeemScript"));
                 CScript redeemScript(rsData.begin(), rsData.end());
                 tempKeystore.AddCScript(redeemScript);
             }
@@ -506,8 +504,8 @@ public:
     }
 };
 
-static void MutateTx(CMutableTransaction& tx, const string& command,
-                     const string& commandVal)
+static void MutateTx(CMutableTransaction& tx, const std::string& command,
+                     const std::string& commandVal)
 {
     std::unique_ptr<Secp256k1Init> ecc;
 
@@ -542,7 +540,7 @@ static void MutateTx(CMutableTransaction& tx, const string& command,
         RegisterSet(commandVal);
 
     else
-        throw runtime_error("unknown command");
+        throw std::runtime_error("unknown command");
 }
 
 static void OutputTxJSON(const CTransaction& tx)
@@ -550,20 +548,20 @@ static void OutputTxJSON(const CTransaction& tx)
     UniValue entry(UniValue::VOBJ);
     TxToUniv(tx, uint256(), entry);
 
-    string jsonOutput = entry.write(4);
+    std::string jsonOutput = entry.write(4);
     fprintf(stdout, "%s\n", jsonOutput.c_str());
 }
 
 static void OutputTxHash(const CTransaction& tx)
 {
-    string strHexHash = tx.GetHash().GetHex(); // the hex-encoded transaction hash (aka the transaction id)
+    std::string strHexHash = tx.GetHash().GetHex(); // the hex-encoded transaction hash (aka the transaction id)
 
     fprintf(stdout, "%s\n", strHexHash.c_str());
 }
 
 static void OutputTxHex(const CTransaction& tx)
 {
-    string strHex = EncodeHexTx(tx);
+    std::string strHex = EncodeHexTx(tx);
 
     fprintf(stdout, "%s\n", strHex.c_str());
 }
@@ -578,10 +576,10 @@ static void OutputTx(const CTransaction& tx)
         OutputTxHex(tx);
 }
 
-static string readStdin()
+static std::string readStdin()
 {
     char buf[4096];
-    string ret;
+    std::string ret;
 
     while (!feof(stdin)) {
         size_t bread = fread(buf, 1, sizeof(buf), stdin);
@@ -591,7 +589,7 @@ static string readStdin()
     }
 
     if (ferror(stdin))
-        throw runtime_error("error reading stdin");
+        throw std::runtime_error("error reading stdin");
 
     boost::algorithm::trim_right(ret);
 
@@ -600,7 +598,7 @@ static string readStdin()
 
 static int CommandLineRawTx(int argc, char* argv[])
 {
-    string strPrint;
+    std::string strPrint;
     int nRet = 0;
     try {
         // Skip switches; Permit common stdin convention "-"
@@ -616,15 +614,15 @@ static int CommandLineRawTx(int argc, char* argv[])
         if (!fCreateBlank) {
             // require at least one param
             if (argc < 2)
-                throw runtime_error("too few parameters");
+                throw std::runtime_error("too few parameters");
 
             // param: hex-encoded dash transaction
-            string strHexTx(argv[1]);
+            std::string strHexTx(argv[1]);
             if (strHexTx == "-")                 // "-" implies standard input
                 strHexTx = readStdin();
 
             if (!DecodeHexTx(txDecodeTmp, strHexTx))
-                throw runtime_error("invalid transaction encoding");
+                throw std::runtime_error("invalid transaction encoding");
 
             startArg = 2;
         } else
@@ -633,10 +631,10 @@ static int CommandLineRawTx(int argc, char* argv[])
         CMutableTransaction tx(txDecodeTmp);
 
         for (int i = startArg; i < argc; i++) {
-            string arg = argv[i];
-            string key, value;
+            std::string arg = argv[i];
+            std::string key, value;
             size_t eqpos = arg.find('=');
-            if (eqpos == string::npos)
+            if (eqpos == std::string::npos)
                 key = arg;
             else {
                 key = arg.substr(0, eqpos);
@@ -653,7 +651,7 @@ static int CommandLineRawTx(int argc, char* argv[])
         throw;
     }
     catch (const std::exception& e) {
-        strPrint = string("error: ") + e.what();
+        strPrint = std::string("error: ") + e.what();
         nRet = EXIT_FAILURE;
     }
     catch (...) {