diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index 24ced1a819179..f38b8f88aab7d 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -28,7 +28,6 @@
 
 #include <mutex>
 #include <condition_variable>
-using namespace std;
 
 struct CUpdatedBlock
 {
@@ -154,7 +153,7 @@ UniValue blockToJSON(const CBlock& block, const CBlockIndex* blockindex, bool tx
 UniValue getblockcount(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 0)
-        throw runtime_error(
+        throw std::runtime_error(
             "getblockcount\n"
             "\nReturns the number of blocks in the longest blockchain.\n"
             "\nResult:\n"
@@ -171,7 +170,7 @@ UniValue getblockcount(const JSONRPCRequest& request)
 UniValue getbestblockhash(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 0)
-        throw runtime_error(
+        throw std::runtime_error(
             "getbestblockhash\n"
             "\nReturns the hash of the best (tip) block in the longest blockchain.\n"
             "\nResult:\n"
@@ -198,7 +197,7 @@ void RPCNotifyBlockChange(bool ibd, const CBlockIndex * pindex)
 UniValue waitfornewblock(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() > 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "waitfornewblock (timeout)\n"
             "\nWaits for a specific new block and returns useful info about it.\n"
             "\nReturns the current block on timeout or exit.\n"
@@ -236,7 +235,7 @@ UniValue waitfornewblock(const JSONRPCRequest& request)
 UniValue waitforblock(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() < 1 || request.params.size() > 2)
-        throw runtime_error(
+        throw std::runtime_error(
             "waitforblock <blockhash> (timeout)\n"
             "\nWaits for a specific new block and returns useful info about it.\n"
             "\nReturns the current block on timeout or exit.\n"
@@ -278,7 +277,7 @@ UniValue waitforblock(const JSONRPCRequest& request)
 UniValue waitforblockheight(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() < 1 || request.params.size() > 2)
-        throw runtime_error(
+        throw std::runtime_error(
             "waitforblockheight <height> (timeout)\n"
             "\nWaits for (at least) block height and returns the height and hash\n"
             "of the current tip.\n"
@@ -320,7 +319,7 @@ UniValue waitforblockheight(const JSONRPCRequest& request)
 UniValue getdifficulty(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 0)
-        throw runtime_error(
+        throw std::runtime_error(
             "getdifficulty\n"
             "\nReturns the proof-of-work difficulty as a multiple of the minimum difficulty.\n"
             "\nResult:\n"
@@ -368,7 +367,7 @@ void entryToJSON(UniValue &info, const CTxMemPoolEntry &e)
     info.push_back(Pair("ancestorsize", e.GetSizeWithAncestors()));
     info.push_back(Pair("ancestorfees", e.GetModFeesWithAncestors()));
     const CTransaction& tx = e.GetTx();
-    set<string> setDepends;
+    std::set<std::string> setDepends;
     BOOST_FOREACH(const CTxIn& txin, tx.vin)
     {
         if (mempool.exists(txin.prevout.hash))
@@ -376,7 +375,7 @@ void entryToJSON(UniValue &info, const CTxMemPoolEntry &e)
     }
 
     UniValue depends(UniValue::VARR);
-    BOOST_FOREACH(const string& dep, setDepends)
+    BOOST_FOREACH(const std::string& dep, setDepends)
     {
         depends.push_back(dep);
     }
@@ -401,7 +400,7 @@ UniValue mempoolToJSON(bool fVerbose = false)
     }
     else
     {
-        vector<uint256> vtxid;
+        std::vector<uint256> vtxid;
         mempool.queryHashes(vtxid);
 
         UniValue a(UniValue::VARR);
@@ -415,7 +414,7 @@ UniValue mempoolToJSON(bool fVerbose = false)
 UniValue getrawmempool(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() > 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "getrawmempool ( verbose )\n"
             "\nReturns all transaction ids in memory pool as a json array of string transaction ids.\n"
             "\nArguments:\n"
@@ -446,7 +445,7 @@ UniValue getrawmempool(const JSONRPCRequest& request)
 UniValue getmempoolancestors(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() < 1 || request.params.size() > 2) {
-        throw runtime_error(
+        throw std::runtime_error(
             "getmempoolancestors txid (verbose)\n"
             "\nIf txid is in the mempool, returns all in-mempool ancestors.\n"
             "\nArguments:\n"
@@ -510,7 +509,7 @@ UniValue getmempoolancestors(const JSONRPCRequest& request)
 UniValue getmempooldescendants(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() < 1 || request.params.size() > 2) {
-        throw runtime_error(
+        throw std::runtime_error(
             "getmempooldescendants txid (verbose)\n"
             "\nIf txid is in the mempool, returns all in-mempool descendants.\n"
             "\nArguments:\n"
@@ -574,7 +573,7 @@ UniValue getmempooldescendants(const JSONRPCRequest& request)
 UniValue getmempoolentry(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 1) {
-        throw runtime_error(
+        throw std::runtime_error(
             "getmempoolentry txid\n"
             "\nReturns mempool data for given transaction\n"
             "\nArguments:\n"
@@ -607,7 +606,7 @@ UniValue getmempoolentry(const JSONRPCRequest& request)
 UniValue getblockhash(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "getblockhash height\n"
             "\nReturns hash of block in best-block-chain at height provided.\n"
             "\nArguments:\n"
@@ -632,7 +631,7 @@ UniValue getblockhash(const JSONRPCRequest& request)
 UniValue getblockheader(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() < 1 || request.params.size() > 2)
-        throw runtime_error(
+        throw std::runtime_error(
             "getblockheader \"hash\" ( verbose )\n"
             "\nIf verbose is false, returns a string that is serialized, hex-encoded data for blockheader 'hash'.\n"
             "If verbose is true, returns an Object with information about blockheader <hash>.\n"
@@ -691,7 +690,7 @@ UniValue getblockheader(const JSONRPCRequest& request)
 UniValue getblock(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() < 1 || request.params.size() > 2)
-        throw runtime_error(
+        throw std::runtime_error(
             "getblock \"blockhash\" ( verbose )\n"
             "\nIf verbose is false, returns a string that is serialized, hex-encoded data for block 'hash'.\n"
             "If verbose is true, returns an Object with information about block <hash>.\n"
@@ -818,7 +817,7 @@ static bool GetUTXOStats(CCoinsView *view, CCoinsStats &stats)
 UniValue pruneblockchain(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "pruneblockchain\n"
             "\nArguments:\n"
             "1. \"height\"       (numeric, required) The block height to prune up to. May be set to a discrete height, or a unix timestamp\n"
@@ -867,7 +866,7 @@ UniValue pruneblockchain(const JSONRPCRequest& request)
 UniValue gettxoutsetinfo(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 0)
-        throw runtime_error(
+        throw std::runtime_error(
             "gettxoutsetinfo\n"
             "\nReturns statistics about the unspent transaction output set.\n"
             "Note this call may take some time.\n"
@@ -907,7 +906,7 @@ UniValue gettxoutsetinfo(const JSONRPCRequest& request)
 UniValue gettxout(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() < 2 || request.params.size() > 3)
-        throw runtime_error(
+        throw std::runtime_error(
             "gettxout \"txid\" n ( include_mempool )\n"
             "\nReturns details about an unspent transaction output.\n"
             "\nArguments:\n"
@@ -989,7 +988,7 @@ UniValue verifychain(const JSONRPCRequest& request)
     int nCheckLevel = GetArg("-checklevel", DEFAULT_CHECKLEVEL);
     int nCheckDepth = GetArg("-checkblocks", DEFAULT_CHECKBLOCKS);
     if (request.fHelp || request.params.size() > 2)
-        throw runtime_error(
+        throw std::runtime_error(
             "verifychain ( checklevel nblocks )\n"
             "\nVerifies blockchain database.\n"
             "\nArguments:\n"
@@ -1075,7 +1074,7 @@ void BIP9SoftForkDescPushBack(UniValue& bip9_softforks, const std::string &name,
 UniValue getblockchaininfo(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 0)
-        throw runtime_error(
+        throw std::runtime_error(
             "getblockchaininfo\n"
             "Returns an object containing various state info regarding blockchain processing.\n"
             "\nResult:\n"
@@ -1168,7 +1167,7 @@ struct CompareBlocksByHeight
 UniValue getchaintips(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 0)
-        throw runtime_error(
+        throw std::runtime_error(
             "getchaintips\n"
             "Return information about all known tips in the block tree,"
             " including the main chain as well as orphaned branches.\n"
@@ -1201,7 +1200,7 @@ UniValue getchaintips(const JSONRPCRequest& request)
     LOCK(cs_main);
 
     /*
-     * Idea:  the set of chain tips is chainActive.tip, plus orphan blocks which do not have another orphan building off of them. 
+     * Idea:  the set of chain tips is chainActive.tip, plus orphan blocks which do not have another orphan building off of them.
      * Algorithm:
      *  - Make one pass through mapBlockIndex, picking out the orphan blocks, and also storing a set of the orphan block's pprev pointers.
      *  - Iterate through the orphan blocks. If the block isn't pointed to by another orphan, it is a chain tip.
@@ -1240,7 +1239,7 @@ UniValue getchaintips(const JSONRPCRequest& request)
         const int branchLen = block->nHeight - chainActive.FindFork(block)->nHeight;
         obj.push_back(Pair("branchlen", branchLen));
 
-        string status;
+        std::string status;
         if (chainActive.Contains(block)) {
             // This block is part of the currently active chain.
             status = "active";
@@ -1284,7 +1283,7 @@ UniValue mempoolInfoToJSON()
 UniValue getmempoolinfo(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 0)
-        throw runtime_error(
+        throw std::runtime_error(
             "getmempoolinfo\n"
             "\nReturns details on the active state of the TX memory pool.\n"
             "\nResult:\n"
@@ -1306,7 +1305,7 @@ UniValue getmempoolinfo(const JSONRPCRequest& request)
 UniValue preciousblock(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "preciousblock \"blockhash\"\n"
             "\nTreats a block as if it were received before others with the same work.\n"
             "\nA later preciousblock call can override the effect of an earlier one.\n"
@@ -1344,7 +1343,7 @@ UniValue preciousblock(const JSONRPCRequest& request)
 UniValue invalidateblock(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "invalidateblock \"blockhash\"\n"
             "\nPermanently marks a block as invalid, as if it violated a consensus rule.\n"
             "\nArguments:\n"
@@ -1382,7 +1381,7 @@ UniValue invalidateblock(const JSONRPCRequest& request)
 UniValue reconsiderblock(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "reconsiderblock \"blockhash\"\n"
             "\nRemoves invalidity status of a block and its descendants, reconsider them for activation.\n"
             "This can be used to undo the effects of invalidateblock.\n"
diff --git a/src/rpc/client.cpp b/src/rpc/client.cpp
index a8c5c21ef1714..2cb250a198074 100644
--- a/src/rpc/client.cpp
+++ b/src/rpc/client.cpp
@@ -13,8 +13,6 @@
 #include <boost/algorithm/string/case_conv.hpp> // for to_lower()
 #include <univalue.h>
 
-using namespace std;
-
 class CRPCConvertParam
 {
 public:
@@ -168,7 +166,7 @@ UniValue ParseNonRFCJSONValue(const std::string& strVal)
     UniValue jVal;
     if (!jVal.read(std::string("[")+strVal+std::string("]")) ||
         !jVal.isArray() || jVal.size()!=1)
-        throw runtime_error(string("Error parsing JSON:")+strVal);
+        throw std::runtime_error(std::string("Error parsing JSON:")+strVal);
     return jVal[0];
 }
 
diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp
index 4ff8f39edcf8e..abdfa651abc5b 100644
--- a/src/rpc/mining.cpp
+++ b/src/rpc/mining.cpp
@@ -30,8 +30,6 @@
 
 #include <univalue.h>
 
-using namespace std;
-
 /**
  * Return average network hashes per second based on the last 'lookup' blocks,
  * or from the last difficulty change if 'lookup' is nonpositive.
@@ -77,7 +75,7 @@ UniValue GetNetworkHashPS(int lookup, int height) {
 UniValue getnetworkhashps(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() > 2)
-        throw runtime_error(
+        throw std::runtime_error(
             "getnetworkhashps ( nblocks height )\n"
             "\nReturns the estimated network hashes per second based on the last n blocks.\n"
             "Pass in [blocks] to override # of blocks, -1 specifies since last difficulty change.\n"
@@ -149,7 +147,7 @@ UniValue generateBlocks(boost::shared_ptr<CReserveScript> coinbaseScript, int nG
 UniValue generate(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() < 1 || request.params.size() > 2)
-        throw runtime_error(
+        throw std::runtime_error(
             "generate nblocks ( maxtries )\n"
             "\nMine up to nblocks blocks immediately (before the RPC call returns)\n"
             "\nArguments:\n"
@@ -185,7 +183,7 @@ UniValue generate(const JSONRPCRequest& request)
 UniValue generatetoaddress(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() < 2 || request.params.size() > 3)
-        throw runtime_error(
+        throw std::runtime_error(
             "generatetoaddress nblocks address (maxtries)\n"
             "\nMine blocks immediately to a specified address (before the RPC call returns)\n"
             "\nArguments:\n"
@@ -208,7 +206,7 @@ UniValue generatetoaddress(const JSONRPCRequest& request)
     CBitcoinAddress address(request.params[1].get_str());
     if (!address.IsValid())
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Error: Invalid address");
-    
+
     boost::shared_ptr<CReserveScript> coinbaseScript(new CReserveScript());
     coinbaseScript->reserveScript = GetScriptForDestination(address.Get());
 
@@ -218,7 +216,7 @@ UniValue generatetoaddress(const JSONRPCRequest& request)
 UniValue getmininginfo(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 0)
-        throw runtime_error(
+        throw std::runtime_error(
             "getmininginfo\n"
             "\nReturns a json object containing mining-related information."
             "\nResult:\n"
@@ -259,7 +257,7 @@ UniValue getmininginfo(const JSONRPCRequest& request)
 UniValue prioritisetransaction(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 2)
-        throw runtime_error(
+        throw std::runtime_error(
             "prioritisetransaction <txid> <fee delta>\n"
             "Accepts the transaction into mined blocks at a higher (or lower) priority\n"
             "\nArguments:\n"
@@ -315,7 +313,7 @@ std::string gbt_vb_name(const Consensus::DeploymentPos pos) {
 UniValue getblocktemplate(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() > 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "getblocktemplate ( TemplateRequest )\n"
             "\nIf the request parameters include a 'mode' key, that is used to explicitly select between the default 'template' request or a 'proposal'.\n"
             "It returns data needed to construct a block to work on.\n"
@@ -553,7 +551,7 @@ UniValue getblocktemplate(const JSONRPCRequest& request)
     UniValue aCaps(UniValue::VARR); aCaps.push_back("proposal");
 
     UniValue transactions(UniValue::VARR);
-    map<uint256, int64_t> setTxIndex;
+    std::map<uint256, int64_t> setTxIndex;
     int i = 0;
     for (const auto& it : pblock->vtx) {
         const CTransaction& tx = *it;
@@ -712,7 +710,7 @@ class submitblock_StateCatcher : public CValidationInterface
 UniValue submitblock(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() < 1 || request.params.size() > 2)
-        throw runtime_error(
+        throw std::runtime_error(
             "submitblock \"hexdata\" ( \"jsonparametersobject\" )\n"
             "\nAttempts to submit new block to network.\n"
             "The 'jsonparametersobject' parameter is currently ignored.\n"
@@ -777,7 +775,7 @@ UniValue submitblock(const JSONRPCRequest& request)
 UniValue estimatefee(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "estimatefee nblocks\n"
             "\nEstimates the approximate fee per kilobyte needed for a transaction to begin\n"
             "confirmation within nblocks blocks. Uses virtual transaction size of transaction\n"
@@ -811,7 +809,7 @@ UniValue estimatefee(const JSONRPCRequest& request)
 UniValue estimatesmartfee(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "estimatesmartfee nblocks\n"
             "\nWARNING: This interface is unstable and may disappear or change!\n"
             "\nEstimates the approximate fee per kilobyte needed for a transaction to begin\n"
diff --git a/src/rpc/misc.cpp b/src/rpc/misc.cpp
index 5d86e94846e82..2a8f95b6157c5 100644
--- a/src/rpc/misc.cpp
+++ b/src/rpc/misc.cpp
@@ -25,8 +25,6 @@
 
 #include <univalue.h>
 
-using namespace std;
-
 /**
  * @note Do not add or change anything in the information returned by this
  * method. `getinfo` exists for backwards-compatibility only. It combines
@@ -43,7 +41,7 @@ using namespace std;
 UniValue getinfo(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 0)
-        throw runtime_error(
+        throw std::runtime_error(
             "getinfo\n"
             "\nDEPRECATED. Returns an object containing various state info.\n"
             "\nResult:\n"
@@ -94,7 +92,7 @@ UniValue getinfo(const JSONRPCRequest& request)
     obj.push_back(Pair("timeoffset",    GetTimeOffset()));
     if(g_connman)
         obj.push_back(Pair("connections",   (int)g_connman->GetNodeCount(CConnman::CONNECTIONS_ALL)));
-    obj.push_back(Pair("proxy",         (proxy.IsValid() ? proxy.proxy.ToStringIPPort() : string())));
+    obj.push_back(Pair("proxy",         (proxy.IsValid() ? proxy.proxy.ToStringIPPort() : std::string())));
     obj.push_back(Pair("difficulty",    (double)GetDifficulty()));
     obj.push_back(Pair("testnet",       Params().NetworkIDString() == CBaseChainParams::TESTNET));
 #ifdef ENABLE_WALLET
@@ -159,7 +157,7 @@ class DescribeAddressVisitor : public boost::static_visitor<UniValue>
 UniValue validateaddress(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "validateaddress \"address\"\n"
             "\nReturn information about the given bitcoin address.\n"
             "\nArguments:\n"
@@ -200,7 +198,7 @@ UniValue validateaddress(const JSONRPCRequest& request)
     if (isValid)
     {
         CTxDestination dest = address.Get();
-        string currentAddress = address.ToString();
+        std::string currentAddress = address.ToString();
         ret.push_back(Pair("address", currentAddress));
 
         CScript scriptPubKey = GetScriptForDestination(dest);
@@ -248,13 +246,13 @@ CScript _createmultisig_redeemScript(CWallet * const pwallet, const UniValue& pa
 
     // Gather public keys
     if (nRequired < 1)
-        throw runtime_error("a multisignature address must require at least one key to redeem");
+        throw std::runtime_error("a multisignature address must require at least one key to redeem");
     if ((int)keys.size() < nRequired)
-        throw runtime_error(
+        throw std::runtime_error(
             strprintf("not enough keys supplied "
                       "(got %u keys, but need at least %d to redeem)", keys.size(), nRequired));
     if (keys.size() > 16)
-        throw runtime_error("Number of addresses involved in the multisignature address creation > 16\nReduce the number");
+        throw std::runtime_error("Number of addresses involved in the multisignature address creation > 16\nReduce the number");
     std::vector<CPubKey> pubkeys;
     pubkeys.resize(keys.size());
     for (unsigned int i = 0; i < keys.size(); i++)
@@ -266,15 +264,15 @@ CScript _createmultisig_redeemScript(CWallet * const pwallet, const UniValue& pa
         if (pwallet && address.IsValid()) {
             CKeyID keyID;
             if (!address.GetKeyID(keyID))
-                throw runtime_error(
+                throw std::runtime_error(
                     strprintf("%s does not refer to a key",ks));
             CPubKey vchPubKey;
             if (!pwallet->GetPubKey(keyID, vchPubKey)) {
-                throw runtime_error(
+                throw std::runtime_error(
                     strprintf("no full public key for address %s",ks));
             }
             if (!vchPubKey.IsFullyValid())
-                throw runtime_error(" Invalid public key: "+ks);
+                throw std::runtime_error(" Invalid public key: "+ks);
             pubkeys[i] = vchPubKey;
         }
 
@@ -285,18 +283,18 @@ CScript _createmultisig_redeemScript(CWallet * const pwallet, const UniValue& pa
         {
             CPubKey vchPubKey(ParseHex(ks));
             if (!vchPubKey.IsFullyValid())
-                throw runtime_error(" Invalid public key: "+ks);
+                throw std::runtime_error(" Invalid public key: "+ks);
             pubkeys[i] = vchPubKey;
         }
         else
         {
-            throw runtime_error(" Invalid public key: "+ks);
+            throw std::runtime_error(" Invalid public key: "+ks);
         }
     }
     CScript result = GetScriptForMultisig(nRequired, pubkeys);
 
     if (result.size() > MAX_SCRIPT_ELEMENT_SIZE)
-        throw runtime_error(
+        throw std::runtime_error(
                 strprintf("redeemScript exceeds size limit: %d > %d", result.size(), MAX_SCRIPT_ELEMENT_SIZE));
 
     return result;
@@ -312,7 +310,7 @@ UniValue createmultisig(const JSONRPCRequest& request)
 
     if (request.fHelp || request.params.size() < 2 || request.params.size() > 2)
     {
-        string msg = "createmultisig nrequired [\"key\",...]\n"
+        std::string msg = "createmultisig nrequired [\"key\",...]\n"
             "\nCreates a multi-signature address with n signature of m keys required.\n"
             "It returns a json object with the address and redeemScript.\n"
 
@@ -336,7 +334,7 @@ UniValue createmultisig(const JSONRPCRequest& request)
             "\nAs a json rpc call\n"
             + HelpExampleRpc("createmultisig", "2, \"[\\\"16sSauSf5pF2UkUwvKGq4qjNRzBZYqgEL5\\\",\\\"171sgjn4YtPu27adkKGrdDwzRTxnRkBfKV\\\"]\"")
         ;
-        throw runtime_error(msg);
+        throw std::runtime_error(msg);
     }
 
     // Construct using pay-to-script-hash:
@@ -354,7 +352,7 @@ UniValue createmultisig(const JSONRPCRequest& request)
 UniValue verifymessage(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 3)
-        throw runtime_error(
+        throw std::runtime_error(
             "verifymessage \"address\" \"signature\" \"message\"\n"
             "\nVerify a signed message\n"
             "\nArguments:\n"
@@ -376,9 +374,9 @@ UniValue verifymessage(const JSONRPCRequest& request)
 
     LOCK(cs_main);
 
-    string strAddress  = request.params[0].get_str();
-    string strSign     = request.params[1].get_str();
-    string strMessage  = request.params[2].get_str();
+    std::string strAddress  = request.params[0].get_str();
+    std::string strSign     = request.params[1].get_str();
+    std::string strMessage  = request.params[2].get_str();
 
     CBitcoinAddress addr(strAddress);
     if (!addr.IsValid())
@@ -389,7 +387,7 @@ UniValue verifymessage(const JSONRPCRequest& request)
         throw JSONRPCError(RPC_TYPE_ERROR, "Address does not refer to key");
 
     bool fInvalid = false;
-    vector<unsigned char> vchSig = DecodeBase64(strSign.c_str(), &fInvalid);
+    std::vector<unsigned char> vchSig = DecodeBase64(strSign.c_str(), &fInvalid);
 
     if (fInvalid)
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Malformed base64 encoding");
@@ -408,7 +406,7 @@ UniValue verifymessage(const JSONRPCRequest& request)
 UniValue signmessagewithprivkey(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 2)
-        throw runtime_error(
+        throw std::runtime_error(
             "signmessagewithprivkey \"privkey\" \"message\"\n"
             "\nSign a message with the private key of an address\n"
             "\nArguments:\n"
@@ -425,8 +423,8 @@ UniValue signmessagewithprivkey(const JSONRPCRequest& request)
             + HelpExampleRpc("signmessagewithprivkey", "\"privkey\", \"my message\"")
         );
 
-    string strPrivkey = request.params[0].get_str();
-    string strMessage = request.params[1].get_str();
+    std::string strPrivkey = request.params[0].get_str();
+    std::string strMessage = request.params[1].get_str();
 
     CBitcoinSecret vchSecret;
     bool fGood = vchSecret.SetString(strPrivkey);
@@ -440,7 +438,7 @@ UniValue signmessagewithprivkey(const JSONRPCRequest& request)
     ss << strMessageMagic;
     ss << strMessage;
 
-    vector<unsigned char> vchSig;
+    std::vector<unsigned char> vchSig;
     if (!key.SignCompact(ss.GetHash(), vchSig))
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Sign failed");
 
@@ -450,7 +448,7 @@ UniValue signmessagewithprivkey(const JSONRPCRequest& request)
 UniValue setmocktime(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "setmocktime timestamp\n"
             "\nSet the local time to given timestamp (-regtest only)\n"
             "\nArguments:\n"
@@ -459,7 +457,7 @@ UniValue setmocktime(const JSONRPCRequest& request)
         );
 
     if (!Params().MineBlocksOnDemand())
-        throw runtime_error("setmocktime for regression testing (-regtest mode) only");
+        throw std::runtime_error("setmocktime for regression testing (-regtest mode) only");
 
     // For now, don't change mocktime if we're in the middle of validation, as
     // this could have an effect on mempool time-based eviction, as well as
@@ -493,7 +491,7 @@ UniValue getmemoryinfo(const JSONRPCRequest& request)
      * as users will undoubtedly confuse it with the other "memory pool"
      */
     if (request.fHelp || request.params.size() != 0)
-        throw runtime_error(
+        throw std::runtime_error(
             "getmemoryinfo\n"
             "Returns an object containing information about memory usage.\n"
             "\nResult:\n"
@@ -519,7 +517,7 @@ UniValue getmemoryinfo(const JSONRPCRequest& request)
 UniValue echo(const JSONRPCRequest& request)
 {
     if (request.fHelp)
-        throw runtime_error(
+        throw std::runtime_error(
             "echo|echojson \"message\" ...\n"
             "\nSimply echo back the input arguments. This command is for testing.\n"
             "\nThe difference between echo and echojson is that echojson has argument conversion enabled in the client-side table in"
diff --git a/src/rpc/net.cpp b/src/rpc/net.cpp
index a7169749c3297..b946a64ec6fd7 100644
--- a/src/rpc/net.cpp
+++ b/src/rpc/net.cpp
@@ -23,12 +23,10 @@
 
 #include <univalue.h>
 
-using namespace std;
-
 UniValue getconnectioncount(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 0)
-        throw runtime_error(
+        throw std::runtime_error(
             "getconnectioncount\n"
             "\nReturns the number of connections to other nodes.\n"
             "\nResult:\n"
@@ -47,7 +45,7 @@ UniValue getconnectioncount(const JSONRPCRequest& request)
 UniValue ping(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 0)
-        throw runtime_error(
+        throw std::runtime_error(
             "ping\n"
             "\nRequests that a ping be sent to all other nodes, to measure ping time.\n"
             "Results provided in getpeerinfo, pingtime and pingwait fields are decimal seconds.\n"
@@ -70,7 +68,7 @@ UniValue ping(const JSONRPCRequest& request)
 UniValue getpeerinfo(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 0)
-        throw runtime_error(
+        throw std::runtime_error(
             "getpeerinfo\n"
             "\nReturns data about each connected network node as a json array of objects.\n"
             "\nResult:\n"
@@ -102,7 +100,7 @@ UniValue getpeerinfo(const JSONRPCRequest& request)
             "       n,                        (numeric) The heights of blocks we're currently asking from this peer\n"
             "       ...\n"
             "    ],\n"
-            "    \"whitelisted\": true|false, (boolean) Whether the peer is whitelisted\n"					
+            "    \"whitelisted\": true|false, (boolean) Whether the peer is whitelisted\n"
             "    \"bytessent_per_msg\": {\n"
             "       \"addr\": n,              (numeric) The total bytes sent aggregated by message type\n"
             "       ...\n"
@@ -122,7 +120,7 @@ UniValue getpeerinfo(const JSONRPCRequest& request)
     if(!g_connman)
         throw JSONRPCError(RPC_CLIENT_P2P_DISABLED, "Error: Peer-to-peer functionality missing or disabled");
 
-    vector<CNodeStats> vstats;
+    std::vector<CNodeStats> vstats;
     g_connman->GetNodeStats(vstats);
 
     UniValue ret(UniValue::VARR);
@@ -191,12 +189,12 @@ UniValue getpeerinfo(const JSONRPCRequest& request)
 
 UniValue addnode(const JSONRPCRequest& request)
 {
-    string strCommand;
+    std::string strCommand;
     if (request.params.size() == 2)
         strCommand = request.params[1].get_str();
     if (request.fHelp || request.params.size() != 2 ||
         (strCommand != "onetry" && strCommand != "add" && strCommand != "remove"))
-        throw runtime_error(
+        throw std::runtime_error(
             "addnode \"node\" \"add|remove|onetry\"\n"
             "\nAttempts add or remove a node from the addnode list.\n"
             "Or try a connection to a node once.\n"
@@ -211,7 +209,7 @@ UniValue addnode(const JSONRPCRequest& request)
     if(!g_connman)
         throw JSONRPCError(RPC_CLIENT_P2P_DISABLED, "Error: Peer-to-peer functionality missing or disabled");
 
-    string strNode = request.params[0].get_str();
+    std::string strNode = request.params[0].get_str();
 
     if (strCommand == "onetry")
     {
@@ -237,7 +235,7 @@ UniValue addnode(const JSONRPCRequest& request)
 UniValue disconnectnode(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "disconnectnode \"node\" \n"
             "\nImmediately disconnects from the specified node.\n"
             "\nArguments:\n"
@@ -260,7 +258,7 @@ UniValue disconnectnode(const JSONRPCRequest& request)
 UniValue getaddednodeinfo(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() > 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "getaddednodeinfo ( \"node\" )\n"
             "\nReturns information about the given added node, or all added nodes\n"
             "(note that onetry addnodes are not listed here)\n"
@@ -328,7 +326,7 @@ UniValue getaddednodeinfo(const JSONRPCRequest& request)
 UniValue getnettotals(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() > 0)
-        throw runtime_error(
+        throw std::runtime_error(
             "getnettotals\n"
             "\nReturns information about network traffic, including bytes in, bytes out,\n"
             "and current time.\n"
@@ -384,7 +382,7 @@ static UniValue GetNetworksInfo()
         obj.push_back(Pair("name", GetNetworkName(network)));
         obj.push_back(Pair("limited", IsLimited(network)));
         obj.push_back(Pair("reachable", IsReachable(network)));
-        obj.push_back(Pair("proxy", proxy.IsValid() ? proxy.proxy.ToStringIPPort() : string()));
+        obj.push_back(Pair("proxy", proxy.IsValid() ? proxy.proxy.ToStringIPPort() : std::string()));
         obj.push_back(Pair("proxy_randomize_credentials", proxy.randomize_credentials));
         networks.push_back(obj);
     }
@@ -394,7 +392,7 @@ static UniValue GetNetworksInfo()
 UniValue getnetworkinfo(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 0)
-        throw runtime_error(
+        throw std::runtime_error(
             "getnetworkinfo\n"
             "Returns an object containing various state info regarding P2P networking.\n"
             "\nResult:\n"
@@ -469,12 +467,12 @@ UniValue getnetworkinfo(const JSONRPCRequest& request)
 
 UniValue setban(const JSONRPCRequest& request)
 {
-    string strCommand;
+    std::string strCommand;
     if (request.params.size() >= 2)
         strCommand = request.params[1].get_str();
     if (request.fHelp || request.params.size() < 2 ||
         (strCommand != "add" && strCommand != "remove"))
-        throw runtime_error(
+        throw std::runtime_error(
                             "setban \"subnet\" \"add|remove\" (bantime) (absolute)\n"
                             "\nAttempts add or remove a IP/Subnet from the banned list.\n"
                             "\nArguments:\n"
@@ -494,7 +492,7 @@ UniValue setban(const JSONRPCRequest& request)
     CNetAddr netAddr;
     bool isSubnet = false;
 
-    if (request.params[0].get_str().find("/") != string::npos)
+    if (request.params[0].get_str().find("/") != std::string::npos)
         isSubnet = true;
 
     if (!isSubnet) {
@@ -534,7 +532,7 @@ UniValue setban(const JSONRPCRequest& request)
 UniValue listbanned(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 0)
-        throw runtime_error(
+        throw std::runtime_error(
                             "listbanned\n"
                             "\nList all banned IPs/Subnets.\n"
                             "\nExamples:\n"
@@ -567,7 +565,7 @@ UniValue listbanned(const JSONRPCRequest& request)
 UniValue clearbanned(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 0)
-        throw runtime_error(
+        throw std::runtime_error(
                             "clearbanned\n"
                             "\nClear all banned IPs.\n"
                             "\nExamples:\n"
@@ -585,7 +583,7 @@ UniValue clearbanned(const JSONRPCRequest& request)
 UniValue setnetworkactive(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 1) {
-        throw runtime_error(
+        throw std::runtime_error(
             "setnetworkactive true|false\n"
             "\nDisable/enable all p2p network activity.\n"
             "\nArguments:\n"
diff --git a/src/rpc/protocol.cpp b/src/rpc/protocol.cpp
index dc710d939f566..2be1edb5a6f50 100644
--- a/src/rpc/protocol.cpp
+++ b/src/rpc/protocol.cpp
@@ -15,8 +15,6 @@
 #include <stdint.h>
 #include <fstream>
 
-using namespace std;
-
 /**
  * JSON-RPC protocol.  Bitcoin speaks version 1.0 for maximum compatibility,
  * but uses JSON-RPC 1.1/2.0 standards for parts of the 1.0 standard that were
@@ -26,7 +24,7 @@ using namespace std;
  * 1.2 spec: http://jsonrpc.org/historical/json-rpc-over-http.html
  */
 
-UniValue JSONRPCRequestObj(const string& strMethod, const UniValue& params, const UniValue& id)
+UniValue JSONRPCRequestObj(const std::string& strMethod, const UniValue& params, const UniValue& id)
 {
     UniValue request(UniValue::VOBJ);
     request.push_back(Pair("method", strMethod));
@@ -47,13 +45,13 @@ UniValue JSONRPCReplyObj(const UniValue& result, const UniValue& error, const Un
     return reply;
 }
 
-string JSONRPCReply(const UniValue& result, const UniValue& error, const UniValue& id)
+std::string JSONRPCReply(const UniValue& result, const UniValue& error, const UniValue& id)
 {
     UniValue reply = JSONRPCReplyObj(result, error, id);
     return reply.write() + "\n";
 }
 
-UniValue JSONRPCError(int code, const string& message)
+UniValue JSONRPCError(int code, const std::string& message)
 {
     UniValue error(UniValue::VOBJ);
     error.push_back(Pair("code", code));
diff --git a/src/rpc/rawtransaction.cpp b/src/rpc/rawtransaction.cpp
index e6fe67de92165..c438d90a479d3 100644
--- a/src/rpc/rawtransaction.cpp
+++ b/src/rpc/rawtransaction.cpp
@@ -34,12 +34,10 @@
 
 #include <univalue.h>
 
-using namespace std;
-
 void ScriptPubKeyToJSON(const CScript& scriptPubKey, UniValue& out, bool fIncludeHex)
 {
     txnouttype type;
-    vector<CTxDestination> addresses;
+    std::vector<CTxDestination> addresses;
     int nRequired;
 
     out.push_back(Pair("asm", ScriptToAsmStr(scriptPubKey)));
@@ -127,7 +125,7 @@ void TxToJSON(const CTransaction& tx, const uint256 hashBlock, UniValue& entry)
 UniValue getrawtransaction(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() < 1 || request.params.size() > 2)
-        throw runtime_error(
+        throw std::runtime_error(
             "getrawtransaction \"txid\" ( verbose )\n"
 
             "\nNOTE: By default this function only works for mempool transactions. If the -txindex option is\n"
@@ -215,7 +213,7 @@ UniValue getrawtransaction(const JSONRPCRequest& request)
         }
         else {
             throw JSONRPCError(RPC_TYPE_ERROR, "Invalid type provided. Verbose parameter must be a boolean.");
-        } 
+        }
     }
 
     CTransactionRef tx;
@@ -225,7 +223,7 @@ UniValue getrawtransaction(const JSONRPCRequest& request)
             : "No such mempool transaction. Use -txindex to enable blockchain transaction queries") +
             ". Use gettransaction for wallet transactions.");
 
-    string strHex = EncodeHexTx(*tx, RPCSerializationFlags());
+    std::string strHex = EncodeHexTx(*tx, RPCSerializationFlags());
 
     if (!fVerbose)
         return strHex;
@@ -239,7 +237,7 @@ UniValue getrawtransaction(const JSONRPCRequest& request)
 UniValue gettxoutproof(const JSONRPCRequest& request)
 {
     if (request.fHelp || (request.params.size() != 1 && request.params.size() != 2))
-        throw runtime_error(
+        throw std::runtime_error(
             "gettxoutproof [\"txid\",...] ( blockhash )\n"
             "\nReturns a hex-encoded proof that \"txid\" was included in a block.\n"
             "\nNOTE: By default this function only works sometimes. This is when there is an\n"
@@ -257,16 +255,16 @@ UniValue gettxoutproof(const JSONRPCRequest& request)
             "\"data\"           (string) A string that is a serialized, hex-encoded data for the proof.\n"
         );
 
-    set<uint256> setTxids;
+    std::set<uint256> setTxids;
     uint256 oneTxid;
     UniValue txids = request.params[0].get_array();
     for (unsigned int idx = 0; idx < txids.size(); idx++) {
         const UniValue& txid = txids[idx];
         if (txid.get_str().length() != 64 || !IsHex(txid.get_str()))
-            throw JSONRPCError(RPC_INVALID_PARAMETER, string("Invalid txid ")+txid.get_str());
+            throw JSONRPCError(RPC_INVALID_PARAMETER, std::string("Invalid txid ")+txid.get_str());
         uint256 hash(uint256S(txid.get_str()));
         if (setTxids.count(hash))
-            throw JSONRPCError(RPC_INVALID_PARAMETER, string("Invalid parameter, duplicated txid: ")+txid.get_str());
+            throw JSONRPCError(RPC_INVALID_PARAMETER, std::string("Invalid parameter, duplicated txid: ")+txid.get_str());
        setTxids.insert(hash);
        oneTxid = hash;
     }
@@ -319,7 +317,7 @@ UniValue gettxoutproof(const JSONRPCRequest& request)
 UniValue verifytxoutproof(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "verifytxoutproof \"proof\"\n"
             "\nVerifies that a proof points to a transaction in a block, returning the transaction it commits to\n"
             "and throwing an RPC error if the block is not in our best chain\n"
@@ -335,8 +333,8 @@ UniValue verifytxoutproof(const JSONRPCRequest& request)
 
     UniValue res(UniValue::VARR);
 
-    vector<uint256> vMatch;
-    vector<unsigned int> vIndex;
+    std::vector<uint256> vMatch;
+    std::vector<unsigned int> vIndex;
     if (merkleBlock.txn.ExtractMatches(vMatch, vIndex) != merkleBlock.header.hashMerkleRoot)
         return res;
 
@@ -353,7 +351,7 @@ UniValue verifytxoutproof(const JSONRPCRequest& request)
 UniValue createrawtransaction(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() < 2 || request.params.size() > 3)
-        throw runtime_error(
+        throw std::runtime_error(
             "createrawtransaction [{\"txid\":\"id\",\"vout\":n},...] {\"address\":amount,\"data\":\"hex\",...} ( locktime )\n"
             "\nCreate a transaction spending the given inputs and creating new outputs.\n"
             "Outputs can be addresses or data.\n"
@@ -434,9 +432,9 @@ UniValue createrawtransaction(const JSONRPCRequest& request)
         rawTx.vin.push_back(in);
     }
 
-    set<CBitcoinAddress> setAddress;
-    vector<string> addrList = sendTo.getKeys();
-    BOOST_FOREACH(const string& name_, addrList) {
+    std::set<CBitcoinAddress> setAddress;
+    std::vector<std::string> addrList = sendTo.getKeys();
+    BOOST_FOREACH(const std::string& name_, addrList) {
 
         if (name_ == "data") {
             std::vector<unsigned char> data = ParseHexV(sendTo[name_].getValStr(),"Data");
@@ -446,10 +444,10 @@ UniValue createrawtransaction(const JSONRPCRequest& request)
         } else {
             CBitcoinAddress address(name_);
             if (!address.IsValid())
-                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, string("Invalid Bitcoin address: ")+name_);
+                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, std::string("Invalid Bitcoin address: ")+name_);
 
             if (setAddress.count(address))
-                throw JSONRPCError(RPC_INVALID_PARAMETER, string("Invalid parameter, duplicated address: ")+name_);
+                throw JSONRPCError(RPC_INVALID_PARAMETER, std::string("Invalid parameter, duplicated address: ")+name_);
             setAddress.insert(address);
 
             CScript scriptPubKey = GetScriptForDestination(address.Get());
@@ -466,7 +464,7 @@ UniValue createrawtransaction(const JSONRPCRequest& request)
 UniValue decoderawtransaction(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "decoderawtransaction \"hexstring\"\n"
             "\nReturn a JSON object representing the serialized, hex-encoded transaction.\n"
 
@@ -535,7 +533,7 @@ UniValue decoderawtransaction(const JSONRPCRequest& request)
 UniValue decodescript(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() != 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "decodescript \"hexstring\"\n"
             "\nDecode a hex-encoded script.\n"
             "\nArguments:\n"
@@ -562,7 +560,7 @@ UniValue decodescript(const JSONRPCRequest& request)
     UniValue r(UniValue::VOBJ);
     CScript script;
     if (request.params[0].get_str().size() > 0){
-        vector<unsigned char> scriptData(ParseHexV(request.params[0], "argument"));
+        std::vector<unsigned char> scriptData(ParseHexV(request.params[0], "argument"));
         script = CScript(scriptData.begin(), scriptData.end());
     } else {
         // Empty scripts are valid
@@ -600,7 +598,7 @@ UniValue signrawtransaction(const JSONRPCRequest& request)
 #endif
 
     if (request.fHelp || request.params.size() < 1 || request.params.size() > 4)
-        throw runtime_error(
+        throw std::runtime_error(
             "signrawtransaction \"hexstring\" ( [{\"txid\":\"id\",\"vout\":n,\"scriptPubKey\":\"hex\",\"redeemScript\":\"hex\"},...] [\"privatekey1\",...] sighashtype )\n"
             "\nSign inputs for raw transaction (serialized, hex-encoded).\n"
             "The second optional argument (may be null) is an array of previous transaction outputs that\n"
@@ -665,9 +663,9 @@ UniValue signrawtransaction(const JSONRPCRequest& request)
 #endif
     RPCTypeCheck(request.params, boost::assign::list_of(UniValue::VSTR)(UniValue::VARR)(UniValue::VARR)(UniValue::VSTR), true);
 
-    vector<unsigned char> txData(ParseHexV(request.params[0], "argument 1"));
+    std::vector<unsigned char> txData(ParseHexV(request.params[0], "argument 1"));
     CDataStream ssData(txData, SER_NETWORK, PROTOCOL_VERSION);
-    vector<CMutableTransaction> txVariants;
+    std::vector<CMutableTransaction> txVariants;
     while (!ssData.empty()) {
         try {
             CMutableTransaction tx;
@@ -750,13 +748,13 @@ UniValue signrawtransaction(const JSONRPCRequest& request)
             if (nOut < 0)
                 throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "vout must be positive");
 
-            vector<unsigned char> pkData(ParseHexO(prevOut, "scriptPubKey"));
+            std::vector<unsigned char> pkData(ParseHexO(prevOut, "scriptPubKey"));
             CScript scriptPubKey(pkData.begin(), pkData.end());
 
             {
                 CCoinsModifier coins = view.ModifyCoins(txid);
                 if (coins->IsAvailable(nOut) && coins->vout[nOut].scriptPubKey != scriptPubKey) {
-                    string err("Previous output scriptPubKey mismatch:\n");
+                    std::string err("Previous output scriptPubKey mismatch:\n");
                     err = err + ScriptToAsmStr(coins->vout[nOut].scriptPubKey) + "\nvs:\n"+
                         ScriptToAsmStr(scriptPubKey);
                     throw JSONRPCError(RPC_DESERIALIZATION_ERROR, err);
@@ -782,7 +780,7 @@ UniValue signrawtransaction(const JSONRPCRequest& request)
                     });
                 UniValue v = find_value(prevOut, "redeemScript");
                 if (!v.isNull()) {
-                    vector<unsigned char> rsData(ParseHexV(v, "redeemScript"));
+                    std::vector<unsigned char> rsData(ParseHexV(v, "redeemScript"));
                     CScript redeemScript(rsData.begin(), rsData.end());
                     tempKeystore.AddCScript(redeemScript);
                 }
@@ -798,16 +796,16 @@ UniValue signrawtransaction(const JSONRPCRequest& request)
 
     int nHashType = SIGHASH_ALL;
     if (request.params.size() > 3 && !request.params[3].isNull()) {
-        static map<string, int> mapSigHashValues =
+        static std::map<std::string, int> mapSigHashValues =
             boost::assign::map_list_of
-            (string("ALL"), int(SIGHASH_ALL))
-            (string("ALL|ANYONECANPAY"), int(SIGHASH_ALL|SIGHASH_ANYONECANPAY))
-            (string("NONE"), int(SIGHASH_NONE))
-            (string("NONE|ANYONECANPAY"), int(SIGHASH_NONE|SIGHASH_ANYONECANPAY))
-            (string("SINGLE"), int(SIGHASH_SINGLE))
-            (string("SINGLE|ANYONECANPAY"), int(SIGHASH_SINGLE|SIGHASH_ANYONECANPAY))
+            (std::string("ALL"), int(SIGHASH_ALL))
+            (std::string("ALL|ANYONECANPAY"), int(SIGHASH_ALL|SIGHASH_ANYONECANPAY))
+            (std::string("NONE"), int(SIGHASH_NONE))
+            (std::string("NONE|ANYONECANPAY"), int(SIGHASH_NONE|SIGHASH_ANYONECANPAY))
+            (std::string("SINGLE"), int(SIGHASH_SINGLE))
+            (std::string("SINGLE|ANYONECANPAY"), int(SIGHASH_SINGLE|SIGHASH_ANYONECANPAY))
             ;
-        string strHashType = request.params[3].get_str();
+        std::string strHashType = request.params[3].get_str();
         if (mapSigHashValues.count(strHashType))
             nHashType = mapSigHashValues[strHashType];
         else
@@ -867,7 +865,7 @@ UniValue signrawtransaction(const JSONRPCRequest& request)
 UniValue sendrawtransaction(const JSONRPCRequest& request)
 {
     if (request.fHelp || request.params.size() < 1 || request.params.size() > 2)
-        throw runtime_error(
+        throw std::runtime_error(
             "sendrawtransaction \"hexstring\" ( allowhighfees )\n"
             "\nSubmits raw transaction (serialized, hex-encoded) to local node and network.\n"
             "\nAlso see createrawtransaction and signrawtransaction calls.\n"
diff --git a/src/rpc/server.cpp b/src/rpc/server.cpp
index f418d71e71fdc..f689b4a28eb7b 100644
--- a/src/rpc/server.cpp
+++ b/src/rpc/server.cpp
@@ -26,9 +26,6 @@
 #include <memory> // for unique_ptr
 #include <unordered_map>
 
-using namespace RPCServer;
-using namespace std;
-
 static bool fRPCRunning = false;
 static bool fRPCInWarmup = true;
 static std::string rpcWarmupStatus("RPC server started");
@@ -67,7 +64,7 @@ void RPCServer::OnPostCommand(boost::function<void (const CRPCCommand&)> slot)
 }
 
 void RPCTypeCheck(const UniValue& params,
-                  const list<UniValue::VType>& typesExpected,
+                  const std::list<UniValue::VType>& typesExpected,
                   bool fAllowNull)
 {
     unsigned int i = 0;
@@ -92,7 +89,7 @@ void RPCTypeCheckArgument(const UniValue& value, UniValue::VType typeExpected)
 }
 
 void RPCTypeCheckObj(const UniValue& o,
-    const map<string, UniValueType>& typesExpected,
+    const std::map<std::string, UniValueType>& typesExpected,
     bool fAllowNull,
     bool fStrict)
 {
@@ -102,7 +99,7 @@ void RPCTypeCheckObj(const UniValue& o,
             throw JSONRPCError(RPC_TYPE_ERROR, strprintf("Missing %s", t.first));
 
         if (!(t.second.typeAny || v.type() == t.second.type || (fAllowNull && v.isNull()))) {
-            string err = strprintf("Expected type %s for %s, got %s",
+            std::string err = strprintf("Expected type %s for %s, got %s",
                 uvTypeName(t.second.type), t.first, uvTypeName(v.type()));
             throw JSONRPCError(RPC_TYPE_ERROR, err);
         }
@@ -110,11 +107,11 @@ void RPCTypeCheckObj(const UniValue& o,
 
     if (fStrict)
     {
-        BOOST_FOREACH(const string& k, o.getKeys())
+        BOOST_FOREACH(const std::string& k, o.getKeys())
         {
             if (typesExpected.count(k) == 0)
             {
-                string err = strprintf("Unexpected key %s", k);
+                std::string err = strprintf("Unexpected key %s", k);
                 throw JSONRPCError(RPC_TYPE_ERROR, err);
             }
         }
@@ -143,9 +140,9 @@ UniValue ValueFromAmount(const CAmount& amount)
             strprintf("%s%d.%08d", sign ? "-" : "", quotient, remainder));
 }
 
-uint256 ParseHashV(const UniValue& v, string strName)
+uint256 ParseHashV(const UniValue& v, std::string strName)
 {
-    string strHex;
+    std::string strHex;
     if (v.isStr())
         strHex = v.get_str();
     if (!IsHex(strHex)) // Note: IsHex("") is false
@@ -156,20 +153,20 @@ uint256 ParseHashV(const UniValue& v, string strName)
     result.SetHex(strHex);
     return result;
 }
-uint256 ParseHashO(const UniValue& o, string strKey)
+uint256 ParseHashO(const UniValue& o, std::string strKey)
 {
     return ParseHashV(find_value(o, strKey), strKey);
 }
-vector<unsigned char> ParseHexV(const UniValue& v, string strName)
+std::vector<unsigned char> ParseHexV(const UniValue& v, std::string strName)
 {
-    string strHex;
+    std::string strHex;
     if (v.isStr())
         strHex = v.get_str();
     if (!IsHex(strHex))
         throw JSONRPCError(RPC_INVALID_PARAMETER, strName+" must be hexadecimal string (not '"+strHex+"')");
     return ParseHex(strHex);
 }
-vector<unsigned char> ParseHexO(const UniValue& o, string strKey)
+std::vector<unsigned char> ParseHexO(const UniValue& o, std::string strKey)
 {
     return ParseHexV(find_value(o, strKey), strKey);
 }
@@ -180,12 +177,12 @@ vector<unsigned char> ParseHexO(const UniValue& o, string strKey)
 
 std::string CRPCTable::help(const std::string& strCommand, const JSONRPCRequest& helpreq) const
 {
-    string strRet;
-    string category;
-    set<rpcfn_type> setDone;
-    vector<pair<string, const CRPCCommand*> > vCommands;
+    std::string strRet;
+    std::string category;
+    std::set<rpcfn_type> setDone;
+    std::vector<std::pair<std::string, const CRPCCommand*> > vCommands;
 
-    for (map<string, const CRPCCommand*>::const_iterator mi = mapCommands.begin(); mi != mapCommands.end(); ++mi)
+    for (std::map<std::string, const CRPCCommand*>::const_iterator mi = mapCommands.begin(); mi != mapCommands.end(); ++mi)
         vCommands.push_back(make_pair(mi->second->category + mi->first, mi->second));
     sort(vCommands.begin(), vCommands.end());
 
@@ -193,10 +190,10 @@ std::string CRPCTable::help(const std::string& strCommand, const JSONRPCRequest&
     jreq.fHelp = true;
     jreq.params = UniValue();
 
-    BOOST_FOREACH(const PAIRTYPE(string, const CRPCCommand*)& command, vCommands)
+    BOOST_FOREACH(const PAIRTYPE(std::string, const CRPCCommand*)& command, vCommands)
     {
         const CRPCCommand *pcmd = command.second;
-        string strMethod = pcmd->name;
+        std::string strMethod = pcmd->name;
         if ((strCommand != "" || pcmd->category == "hidden") && strMethod != strCommand)
             continue;
         jreq.strMethod = strMethod;
@@ -209,10 +206,10 @@ std::string CRPCTable::help(const std::string& strCommand, const JSONRPCRequest&
         catch (const std::exception& e)
         {
             // Help text is returned in an exception
-            string strHelp = string(e.what());
+            std::string strHelp = std::string(e.what());
             if (strCommand == "")
             {
-                if (strHelp.find('\n') != string::npos)
+                if (strHelp.find('\n') != std::string::npos)
                     strHelp = strHelp.substr(0, strHelp.find('\n'));
 
                 if (category != pcmd->category)
@@ -220,7 +217,7 @@ std::string CRPCTable::help(const std::string& strCommand, const JSONRPCRequest&
                     if (!category.empty())
                         strRet += "\n";
                     category = pcmd->category;
-                    string firstLetter = category.substr(0,1);
+                    std::string firstLetter = category.substr(0,1);
                     boost::to_upper(firstLetter);
                     strRet += "== " + firstLetter + category.substr(1) + " ==\n";
                 }
@@ -237,7 +234,7 @@ std::string CRPCTable::help(const std::string& strCommand, const JSONRPCRequest&
 UniValue help(const JSONRPCRequest& jsonRequest)
 {
     if (jsonRequest.fHelp || jsonRequest.params.size() > 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "help ( \"command\" )\n"
             "\nList all commands, or get help for a specified command.\n"
             "\nArguments:\n"
@@ -246,7 +243,7 @@ UniValue help(const JSONRPCRequest& jsonRequest)
             "\"text\"     (string) The help text\n"
         );
 
-    string strCommand;
+    std::string strCommand;
     if (jsonRequest.params.size() > 0)
         strCommand = jsonRequest.params[0].get_str();
 
@@ -258,7 +255,7 @@ UniValue stop(const JSONRPCRequest& jsonRequest)
 {
     // Accept the deprecated and ignored 'detach' boolean argument
     if (jsonRequest.fHelp || jsonRequest.params.size() > 1)
-        throw runtime_error(
+        throw std::runtime_error(
             "stop\n"
             "\nStop Bitcoin server.");
     // Event loop will exit after current HTTP requests have been handled, so
@@ -292,7 +289,7 @@ CRPCTable::CRPCTable()
 
 const CRPCCommand *CRPCTable::operator[](const std::string &name) const
 {
-    map<string, const CRPCCommand*>::const_iterator it = mapCommands.find(name);
+    std::map<std::string, const CRPCCommand*>::const_iterator it = mapCommands.find(name);
     if (it == mapCommands.end())
         return NULL;
     return (*it).second;
@@ -304,7 +301,7 @@ bool CRPCTable::appendCommand(const std::string& name, const CRPCCommand* pcmd)
         return false;
 
     // don't allow overwriting for now
-    map<string, const CRPCCommand*>::const_iterator it = mapCommands.find(name);
+    std::map<std::string, const CRPCCommand*>::const_iterator it = mapCommands.find(name);
     if (it != mapCommands.end())
         return false;