diff --git a/.gitignore b/.gitignore
index 2ca8849..01a7ff2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,3 +15,5 @@ CMakeLists.txt.user
 *.BACKUP.*
 *.BASE.*
 *.LOCAL.*
+bin/
+etc/
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4ad8b92..0729664 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,10 +25,10 @@ set(Boost_USE_MULTITHREADED      ON)
 set(Boost_USE_STATIC_RUNTIME     OFF)
 set(Boost_ALL_DYN_LINK           ON)
 
-SET(Boost_ADDITIONAL_VERSIONS "1.54" "1.54.0")
+SET(Boost_ADDITIONAL_VERSIONS "1.49" "1.49.0")
 
 # Boost
-find_package(Boost 1.54 COMPONENTS thread chrono program_options date_time REQUIRED)
+find_package(Boost 1.49 COMPONENTS thread chrono program_options date_time system REQUIRED)
 message(status "** Boost Include: ${Boost_INCLUDE_DIR}")
 message(status "** Boost Libraries: ${Boost_LIBRARY_DIRS}")
 message(status "** Boost Libraries: ${Boost_LIBRARIES}")
diff --git a/src/server/poolserver/CMakeLists.txt b/src/server/poolserver/CMakeLists.txt
index c41bc49..9a56948 100644
--- a/src/server/poolserver/CMakeLists.txt
+++ b/src/server/poolserver/CMakeLists.txt
@@ -3,12 +3,16 @@
 file(GLOB_RECURSE sources_Server Server/*.cpp Server/*.h)
 file(GLOB_RECURSE sources_Database Database/*.cpp Database/*.h)
 file(GLOB_RECURSE sources_Stratum Stratum/*.cpp Stratum/*.h)
+file(GLOB_RECURSE sources_DataMgr DataMgr/*.cpp DataMgr/*.h)
+file(GLOB_RECURSE sources_NetworkMgr NetworkMgr/*.cpp NetworkMgr/*.h)
 file(GLOB sources_localdir *.cpp *.h)
 
 set(sources_Poolserver
   ${sources_Server}
   ${sources_Database}
   ${sources_Stratum}
+  ${sources_DataMgr}
+  ${sources_NetworkMgr}
   ${sources_localdir}
 )
 
@@ -16,6 +20,8 @@ include_directories(
   ${CMAKE_CURRENT_SOURCE_DIR}
   ${CMAKE_CURRENT_SOURCE_DIR}/Server
   ${CMAKE_CURRENT_SOURCE_DIR}/Database
+  ${CMAKE_CURRENT_SOURCE_DIR}/DataMgr
+  ${CMAKE_CURRENT_SOURCE_DIR}/NetworkMgr
   ${CMAKE_SOURCE_DIR}/src/server/shared
   ${CMAKE_SOURCE_DIR}/src/server/shared/Configuration
   ${CMAKE_SOURCE_DIR}/src/server/shared/MySQL
@@ -46,7 +52,7 @@ target_link_libraries(poolserver
 # Install
 if(UNIX)
   install(TARGETS poolserver DESTINATION bin)
-  install(FILES poolserver.cfg.dist DESTINATION bin)
+  install(FILES poolserver.cfg.dist DESTINATION etc)
 elseif(WIN32)
   install(TARGETS poolserver DESTINATION "${CMAKE_INSTALL_PREFIX}")
   install(FILES poolserver.cfg.dist DESTINATION "${CMAKE_INSTALL_PREFIX}")
diff --git a/src/server/poolserver/DataMgr/DataMgr.cpp b/src/server/poolserver/DataMgr/DataMgr.cpp
new file mode 100644
index 0000000..e1b7279
--- /dev/null
+++ b/src/server/poolserver/DataMgr/DataMgr.cpp
@@ -0,0 +1,36 @@
+#include "DataMgr.h"
+#include "ServerDatabaseEnv.h"
+#include "Util.h"
+#include "Log.h"
+
+template<>
+void DataMgr<Share>::Upload()
+{
+    sLog.Info(LOG_SERVER, "We have %u shares", Size());
+    
+    while (Size() > BULK_MIN)
+    {
+        sLog.Info(LOG_SERVER, "Uploading %u shares to database", Size());
+        
+        std::string query("INSERT INTO `shares` (`rem_host`, `username`, `our_result`, `upstream_result`, `reason`, `time`, `difficulty`) VALUES ");
+        for (int i = 0; i < BULK_COUNT; ++i)
+        {
+            sLog.Info(LOG_SERVER, "Query: %s", query.c_str());
+            
+            Share share = Pop();
+            
+            query += Util::FS("(INET_NTOA(%u), '%s', %u, 0, '%s', FROM_UNIXTIME(%u), %u)", share.host, share.username.c_str(), share.result, share.reason.c_str(), share.time, share.diff);
+            
+            if (!Size())
+                break;
+            
+            if (i != BULK_COUNT-1)
+                query += ',';
+        }
+        
+        
+        sDatabase.ExecuteAsync(query.c_str());
+    }
+}
+
+DataMgr<Share> sDataMgr;
diff --git a/src/server/poolserver/DataMgr/DataMgr.h b/src/server/poolserver/DataMgr/DataMgr.h
new file mode 100644
index 0000000..dbcc32d
--- /dev/null
+++ b/src/server/poolserver/DataMgr/DataMgr.h
@@ -0,0 +1,47 @@
+#ifndef DATAMGR_H_
+#define DATAMGR_H_
+
+#include <deque>
+#include <boost/thread.hpp>
+
+#include "Util.h"
+#include "Share.h"
+
+#define BULK_MIN 1
+#define BULK_COUNT 50
+
+template<class T>
+class DataMgr
+{
+public:
+    DataMgr() {}
+    
+    void Push(T data)
+    {
+        boost::unique_lock<boost::mutex> lock(_datamutex);
+        _datastore.push_back(data);
+    }
+    
+    T Pop()
+    {
+        boost::unique_lock<boost::mutex> lock(_datamutex);
+        Share share = _datastore.front();
+        _datastore.pop_front();
+        return share;
+    }
+    
+    size_t Size()
+    {
+        boost::unique_lock<boost::mutex> lock(_datamutex);
+        return _datastore.size();
+    }
+    
+    void Upload();
+private:
+    boost::mutex _datamutex;
+    std::deque<T> _datastore;
+};
+
+extern DataMgr<Share> sDataMgr;
+
+#endif
diff --git a/src/server/poolserver/DataMgr/Share.h b/src/server/poolserver/DataMgr/Share.h
new file mode 100644
index 0000000..9091fc6
--- /dev/null
+++ b/src/server/poolserver/DataMgr/Share.h
@@ -0,0 +1,22 @@
+#ifndef SHARE_H_
+#define SHARE_H_
+
+#include <string>
+
+#include "Common.h"
+
+class Share
+{
+public:
+    Share(uint32 ahost, std::string ausername, bool aresult, std::string areason, uint64 atime, uint64 adiff):
+    host(ahost), username(ausername), result(aresult), reason(areason), time(atime), diff(adiff) {}
+    
+    uint64 host;
+    std::string username;
+    bool result;
+    std::string reason;
+    uint64 time;
+    uint64 diff;
+};
+
+#endif
diff --git a/src/server/poolserver/Main.cpp b/src/server/poolserver/Main.cpp
index f8ebbb6..8f9b3c1 100644
--- a/src/server/poolserver/Main.cpp
+++ b/src/server/poolserver/Main.cpp
@@ -26,15 +26,16 @@ bool InitConfig(int argc, char *argv[])
     
     // Generic
     descGeneric.add_options()
-        ("version,v", "print version string")
-        ("help,h", "produce help message")
-        ("config,c", boost::program_options::value<std::string>()->default_value("poolserver.cfg"),"name of a file of a configuration.")
+        ("version,v", "Print version string")
+        ("help,h", "Produce help message")
+        ("config,c", boost::program_options::value<std::string>()->default_value("../etc/poolserver.cfg"),"Path to configuration file")
     ;
     
     // Server
     descServer.add_options()
         ("MinDiffTime", boost::program_options::value<uint32_t>()->default_value(100), "Minimum server diff time")
         ("MiningAddress", boost::program_options::value<std::string>()->default_value("n1w8gkPXdNGb6edm4vujBn71A72eQFCNCw"), "Address to send coins to")
+        ("BitcoinRPC", boost::program_options::value<std::vector<std::string> >()->multitoken(), "Bitcoin RPC login credentials")
     ;
     
     // Stratum
@@ -42,13 +43,14 @@ bool InitConfig(int argc, char *argv[])
         ("StratumHost,sh", boost::program_options::value<std::string>()->default_value("0.0.0.0"), "Stratum server host")
         ("StratumPort,sp", boost::program_options::value<uint16_t>()->default_value(3333), "Stratum server port")
         ("StratumBlockCheckTime", boost::program_options::value<uint32>()->default_value(2000), "Time between block checks in ms")
+        ("StratumMinDifficulty", boost::program_options::value<uint32>()->default_value(1), "The difficulty on which a new miner starts")
     ;
     
     // Logging
     descLogging.add_options()
         ("LogConsoleLevel", boost::program_options::value<uint32_t>()->default_value(LOG_LEVEL_INFO), "Console log level (0-None, 1-Error, 2-Warn, 3-Info, 4-Debug)")
         ("LogConsoleDebugMask", boost::program_options::value<uint32_t>()->default_value(0), "Console log debug mask")
-        ("LogFilePath", boost::program_options::value<std::string>()->default_value("."), "File log path")
+        ("LogFilePath", boost::program_options::value<std::string>()->default_value("../etc"), "File log path")
         ("LogFileLevel", boost::program_options::value<uint32_t>()->default_value(LOG_LEVEL_WARN), "File log level (0-None, 1-Error, 2-Warn, 3-Info, 4-Debug)")
         ("LogFileDebugMask", boost::program_options::value<uint32_t>()->default_value(0), "File log debug mask")
     ;
@@ -88,6 +90,8 @@ bool InitConfig(int argc, char *argv[])
         return true;
     }
     
+    sLog.Info(LOG_GENERAL, "Using config file: %s", sConfig.Get<std::string>("config").c_str());
+    
     store(parse_config_file(ifs, fileOptions), sConfig.vm);
     notify(sConfig.vm);
     
@@ -102,7 +106,8 @@ int main(int argc, char *argv[])
     sLog.OpenLogFile(sConfig.Get<std::string>("LogFilePath"));
     sLog.Info(LOG_GENERAL, "LogFile Started: %s", sLog.logFileLoc.c_str());
     
-    Server* server = new Server();
+    boost::asio::io_service io;
+    Server* server = new Server(io);
     int exitcode = server->Run();
     delete server;
 
diff --git a/src/server/poolserver/NetworkMgr/NetworkMgr.cpp b/src/server/poolserver/NetworkMgr/NetworkMgr.cpp
new file mode 100644
index 0000000..9412f13
--- /dev/null
+++ b/src/server/poolserver/NetworkMgr/NetworkMgr.cpp
@@ -0,0 +1,188 @@
+#include "NetworkMgr.h"
+#include "Config.h"
+
+NetworkMgr* NetworkMgr::singleton = 0;
+
+NetworkMgr::NetworkMgr(asio::io_service& io_service) : _io_service(io_service), _blockNotifyTimer(io_service), _blockCheckTimer(io_service), _blockHeight(0)
+{
+    BlockCheckTimerStart();
+    BlockNotifyTimerStart();
+}
+
+NetworkMgr::~NetworkMgr()
+{
+    for (int i = 0; i < _cons.size(); ++i)
+        delete _cons[i];
+}
+
+// Bitcoin daemon connection
+void NetworkMgr::Connect(JSONRPCConnectionInfo coninfo)
+{
+    JSONRPC* bitcoinrpc = new JSONRPC();
+    bitcoinrpc->Connect(coninfo);
+    
+    JSON response = bitcoinrpc->Query("getinfo");
+    
+    if (response["error"].GetType() != JSON_NULL)
+        throw Exception(Util::FS("Failed to get response from bitcoin rpc: %s", response["error"].GetString().c_str()));
+    
+    sLog.Info(LOG_SERVER, "Connected to Bitcoin RPC at %s:%s", coninfo.Host.c_str(), coninfo.Port.c_str());
+    
+    _cons.push_back(bitcoinrpc);
+    
+    // Fetch block height on first connection
+    if (_cons.size() == 1)
+        BlockCheck();
+}
+
+// Get new block template
+void NetworkMgr::UpdateBlockTemplate()
+{
+    // Might be called by block notify timer and block check timer so we need a lock
+    boost::lock_guard<boost::mutex> guard(_mtxBlockTmpl);
+    
+    for (int i = 0; i < _cons.size(); ++i)
+    {
+        try {
+            JSON response = _cons[i]->Query("getblocktemplate");
+            
+            // New blocks may not appear on all daemons the same time
+            if (response["height"].GetInt() < _blockHeight)
+                continue;
+            
+            Bitcoin::BlockPtr block = Bitcoin::BlockPtr(new Bitcoin::Block());
+            
+            block->version = response["version"].GetInt();
+            block->prevBlockHash = Util::Reverse(Util::ASCIIToBin(response["previousblockhash"].GetString()));
+            block->time = response["curtime"].GetInt();
+            // Set bits
+            ByteBuffer bitbuf(Util::Reverse(Util::ASCIIToBin(response["bits"].GetString())));
+            bitbuf >> block->bits;
+            
+            // Add coinbase tx
+            BinaryData pubkey = Util::ASCIIToBin(sConfig.Get<std::string>("MiningAddress"));
+            block->tx.push_back(Bitcoin::CreateCoinbaseTX(_blockHeight, pubkey, response["coinbasevalue"].GetInt()));
+            
+            // Add other transactions
+            JSON trans = response["transactions"];
+            for (uint64 tidx = 0; tidx < trans.Size(); ++tidx) {
+                ByteBuffer txbuf(Util::ASCIIToBin(trans[tidx]["data"].GetString()));
+                Bitcoin::Transaction tx;
+                txbuf >> tx;
+                block->tx.push_back(tx);
+            }
+            
+            // Genrate merkle tree
+            block->BuildMerkleTree();
+            
+            // Set
+            _curBlockTmpl = block;
+            
+            sLog.Debug(LOG_SERVER, "Fetched block template from rpc #%u", i);
+            
+            // Break from loop
+            break;
+        } catch (std::exception& e) {
+            sLog.Error(LOG_SERVER, "Failed to fetch block template from daemon #%u: %s", i, e.what());
+        }
+    }
+}
+
+// Submit new block
+bool NetworkMgr::SubmitBlock(Bitcoin::Block block)
+{
+    // Serialize block
+    ByteBuffer blockbuf;
+    blockbuf << block;
+    
+    for (int i = 0; i < _cons.size(); ++i)
+    {
+        try {
+            JSON params;
+            params.Add(Util::BinToASCII(blockbuf.Binary()));
+            JSON response = _cons[i]->Query("submitblock", params);
+            
+            if (response["result"].GetType() == JSON_NULL) {
+                sLog.Info(LOG_SERVER, "Block accepted! YAY!");
+                BlockCheck();
+                return true;
+            } else {
+                sLog.Error(LOG_SERVER, "Block rejected: %s", response["error"].GetString().c_str());
+            }
+        } catch (std::exception& e) {
+            sLog.Error(LOG_SERVER, "Exception caught while submiting block: %s", e.what());
+        }
+    }
+    
+    return false;
+}
+
+// Check for new blocks
+void NetworkMgr::BlockCheck()
+{
+    // Might be called twice from timer and when block is found
+    boost::lock_guard<boost::mutex> guard(_mtxBlockCheck);
+    
+    for (int i = 0; i < _cons.size(); ++i)
+    {
+        try {
+            JSON response = _cons[i]->Query("getinfo");
+            uint32 curBlock = response["blocks"].GetInt();
+            
+            if (curBlock > _blockHeight) {
+                sLog.Debug(LOG_SERVER, "New block on network! Height: %u", curBlock);
+                _blockHeight = curBlock;
+                
+                // Update block template
+                UpdateBlockTemplate();
+                
+                // Send notifications (and reset work)
+                BlockNotifySend(true);
+            }
+        } catch (std::exception& e) {
+            sLog.Error(LOG_SERVER, "Failed to fetch block height from daemon #%u: %s", i, e.what());
+        }
+    }
+}
+
+void NetworkMgr::BlockCheckTimerStart()
+{
+    _blockCheckTimer.expires_from_now(boost::posix_time::seconds(3));
+    _blockCheckTimer.async_wait(boost::bind(&NetworkMgr::BlockCheckTimerExpired, this,  boost::asio::placeholders::error));
+}
+
+void NetworkMgr::BlockCheckTimerExpired(const boost::system::error_code& /*e*/)
+{
+    BlockCheck();
+    BlockCheckTimerStart();
+}
+
+// Bind for receiving block notifications
+void NetworkMgr::BlockNotifyBind(FBlockNotify f)
+{
+    _blockNotifyBinds.push_back(f);
+}
+
+// Block notify timer
+void NetworkMgr::BlockNotifyTimerStart()
+{
+    _blockNotifyTimer.expires_from_now(boost::posix_time::seconds(3));
+    _blockNotifyTimer.async_wait(boost::bind(&NetworkMgr::BlockNotifyTimerExpired, this,  boost::asio::placeholders::error));
+}
+
+void NetworkMgr::BlockNotifyTimerExpired(const boost::system::error_code& /*e*/)
+{
+    sLog.Debug(LOG_SERVER, "Sending block template update");
+    
+    UpdateBlockTemplate();
+    BlockNotifySend();
+    
+    BlockNotifyTimerStart();
+}
+
+// Send block notification to all subscribers
+void NetworkMgr::BlockNotifySend(bool newBlock)
+{
+    for (int i = 0; i < _blockNotifyBinds.size(); ++i)
+        _io_service.post(boost::bind(_blockNotifyBinds[i], _curBlockTmpl, newBlock));
+}
diff --git a/src/server/poolserver/NetworkMgr/NetworkMgr.h b/src/server/poolserver/NetworkMgr/NetworkMgr.h
new file mode 100644
index 0000000..dbbf89d
--- /dev/null
+++ b/src/server/poolserver/NetworkMgr/NetworkMgr.h
@@ -0,0 +1,84 @@
+#ifndef NETWORKMGR_H_
+#define NETWORKMGR_H_
+
+// Provides high level interaction with bitcoin daemon
+
+#include "JSONRPC.h"
+#include "Bitcoin.h"
+#include "Log.h"
+
+#include <vector>
+#include <boost/asio.hpp>
+#include <boost/function.hpp>
+#include <boost/thread/mutex.hpp>
+
+using namespace boost;
+
+typedef boost::function<void (Bitcoin::BlockPtr /*blockTmpl*/, bool /*newBlock*/)> FBlockNotify;
+
+class NetworkMgr
+{
+    // Singleton
+private:
+    static NetworkMgr* singleton;
+public:
+    
+    static NetworkMgr* Instance()
+    {
+        return singleton;
+    }
+    static void Initialize(asio::io_service& io_service)
+    {
+        singleton = new NetworkMgr(io_service);
+    }
+    
+public:
+    NetworkMgr(asio::io_service& io_service);
+    ~NetworkMgr();
+    
+    // Bitcoin daemon connection
+    void Connect(JSONRPCConnectionInfo coninfo);
+    
+    // Get new block template
+    void UpdateBlockTemplate();
+    
+    // Submit new block
+    bool SubmitBlock(Bitcoin::Block block);
+    
+    // Checking for blocks
+    void BlockCheck();
+    void BlockCheckTimerStart();
+    void BlockCheckTimerExpired(const boost::system::error_code& /*e*/);
+    
+    // Bind for receiving block notifications
+    void BlockNotifyBind(FBlockNotify f);
+    
+    // Block notify timer
+    void BlockNotifyTimerStart();
+    void BlockNotifyTimerExpired(const boost::system::error_code& /*e*/);
+    
+    // Send block notification to all subscribers
+    void BlockNotifySend(bool newBlock = false);
+    
+private:
+    // Holds subscriptions for block notifications
+    std::vector<FBlockNotify> _blockNotifyBinds;
+    boost::asio::deadline_timer _blockNotifyTimer;
+    
+    // Checking for new blocks
+    boost::asio::deadline_timer _blockCheckTimer;
+    boost::mutex _mtxBlockCheck;
+    uint32 _blockHeight;
+    
+    // Connections to bitcoin rpc
+    std::vector<JSONRPC*> _cons;
+    
+    // Current block template
+    Bitcoin::BlockPtr _curBlockTmpl;
+    boost::mutex _mtxBlockTmpl;
+    
+    // ASIO
+    asio::io_service& _io_service;
+};
+
+#endif
diff --git a/src/server/poolserver/Server/Server.cpp b/src/server/poolserver/Server/Server.cpp
index 3e57925..f20a44c 100644
--- a/src/server/poolserver/Server/Server.cpp
+++ b/src/server/poolserver/Server/Server.cpp
@@ -6,22 +6,16 @@
 #include "ServerDatabaseEnv.h"
 #include "Crypto.h"
 #include "Bitcoin.h"
+#include "DataMgr.h"
+#include "NetworkMgr.h"
+#include "Exception.h"
 
 #include <boost/thread.hpp>
 #include <boost/algorithm/string.hpp>
 #include <iostream>
 #include <algorithm>
-struct Share
-{
-    Share(uint64 _id, uint32 _diff, uint32 _workerid, uint32 _timestamp) :
-    id(_id), diff(_diff), workerid(_workerid), timestamp(_timestamp) {}
-    uint64 id;
-    uint32 diff;
-    uint32 workerid;
-    uint32 timestamp;
-};
-
-Server::Server() : serverLoops(0)
+
+Server::Server(asio::io_service& io) : serverLoops(0), io_service(io), uploadtimer(io)
 {
 }
 
@@ -34,13 +28,22 @@ void AsyncQueryCallback(MySQL::QueryResult result)
 {
 }
 
+
+
+void Server::UploadShares(const boost::system::error_code& /*e*/)
+{
+    sDataMgr.Upload();
+    uploadtimer.expires_from_now(boost::posix_time::seconds(3)); //repeat rate here
+    uploadtimer.async_wait(boost::bind(&Server::UploadShares, this, boost::asio::placeholders::error));
+}
+
 int Server::Run()
 {
     sLog.Info(LOG_SERVER, "Server is starting...");
     
     InitDatabase();
     
-    std::vector<Share> shares;
+    /*std::vector<Share> shares;
 
     sLog.Info(LOG_SERVER, "Loading shares...");
     
@@ -51,7 +54,7 @@ int Server::Run()
     sLog.Info(LOG_SERVER, "Min: %u Max: %u", min, max);
     
     MySQL::PreparedStatement* stmt = sDatabase.GetPreparedStatement(STMT_QUERY_SHARES);
-    for (uint32 i = min; i < max; i += 500000)
+    for (uint32 i = min; i <= max; i += 500000)
     {
         stmt->SetUInt32(0, i);
         MySQL::QueryResult result2 = sDatabase.Query(stmt);
@@ -61,11 +64,7 @@ int Server::Run()
         sLog.Info(LOG_SERVER, "Shares: %u", shares.size());
     }
     
-    sLog.Info(LOG_SERVER, "Loaded %u shares", shares.size());
-    
-    JSON node = JSON::FromString("{\"test\":{\"omg\":\"smth\"},\"other\":[\"smth2\", \"smth3\"] }");
-    sLog.Info(LOG_SERVER, "Something2: %s", node["other"][0].GetString().c_str());
-    sLog.Info(LOG_SERVER, "Something: %s", node.ToString().c_str());
+    sLog.Info(LOG_SERVER, "Loaded %u shares", shares.size());*/
     
     /*std::vector<byte> test = Util::ASCIIToBin("4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b");
     sLog.Info(LOG_SERVER, "Hash: %s", Util::BinToASCII(Crypto::SHA256D(test)).c_str());
@@ -103,31 +102,34 @@ int Server::Run()
     
     
     
-    // Main io service
-    asio::io_service io_service;
+    NetworkMgr::Initialize(io_service);
     
-    Stratum::Server srv(io_service);
+    std::vector<std::string> btcrpc = sConfig.Get<std::vector<std::string> >("BitcoinRPC");
+    for (int i = 0; i < btcrpc.size(); ++i) {
+        std::vector<std::string> params = Util::Explode(btcrpc[i], ";");
+        
+        if (params.size() != 4)
+            throw Exception("Invalid Bitcoin RPC parameters");
+        
+        JSONRPCConnectionInfo coninfo;
+        coninfo.Host = params[0];
+        coninfo.Port = params[1];
+        coninfo.User = params[2];
+        coninfo.Pass = params[3];
+        
+        NetworkMgr::Instance()->Connect(coninfo);
+    }
     
-    // Init Bitcoin RPC
-    /*JSONRPCConnectionInfo coninfo;
-    coninfo.Host = "84.240.15.208";
-    coninfo.Port = "8332";
-    coninfo.User = "user";
-    coninfo.Pass = "DYAL6bC4RUHksL6ikdx7";*/
-    JSONRPCConnectionInfo coninfo;
-    coninfo.Host = "127.0.0.1";
-    coninfo.Port = "19001";
-    coninfo.User = "test";
-    coninfo.Pass = "123";
-    
-    JSONRPC* bitcoinrpc = new JSONRPC();
-    bitcoinrpc->Connect(coninfo);
-    srv.SetBitcoinRPC(bitcoinrpc);
+    Stratum::Server srv(io_service);
     
     // Start stratum server
     tcp::endpoint endpoint(tcp::v4(), sConfig.Get<uint16>("StratumPort"));
     srv.Start(endpoint);
     
+    // Start timer
+    uploadtimer.expires_from_now(boost::posix_time::seconds(3)); //repeat rate here
+    uploadtimer.async_wait(boost::bind(&Server::UploadShares, this,  boost::asio::placeholders::error));
+    
     io_service.run();
     
     
@@ -182,7 +184,7 @@ int Server::Run()
         // Mercy for CPU
         if (diff < minDiffTime+sleepDuration) {
             sleepDuration = minDiffTime - diff + sleepDuration;
-            boost::this_thread::sleep_for(boost::chrono::milliseconds(sleepDuration));
+            boost::this_thread::sleep(boost::posix_time::milliseconds(sleepDuration));
         } else
             sleepDuration = 0;
 
diff --git a/src/server/poolserver/Server/Server.h b/src/server/poolserver/Server/Server.h
index 941803a..bf270ac 100644
--- a/src/server/poolserver/Server/Server.h
+++ b/src/server/poolserver/Server/Server.h
@@ -12,11 +12,12 @@
 class Server
 {
 public:
-    Server();
+    Server(asio::io_service& io);
     ~Server();
 
     Stratum::Server* stratumServer;
 
+    void UploadShares(const boost::system::error_code& e);
     boost::chrono::steady_clock::time_point diffStart;
     bool running;
     uint64_t serverLoops;
@@ -25,6 +26,9 @@ public:
     void Update(uint32_t);
     
     bool InitDatabase();
+    
+    boost::asio::deadline_timer uploadtimer;
+    asio::io_service& io_service;
 };
 
 #endif
diff --git a/src/server/poolserver/Stratum/Client.cpp b/src/server/poolserver/Stratum/Client.cpp
index 8159adc..3473517 100644
--- a/src/server/poolserver/Stratum/Client.cpp
+++ b/src/server/poolserver/Stratum/Client.cpp
@@ -1,6 +1,9 @@
 #include "Server.h"
 #include "Client.h"
 #include "BigNum.h"
+#include "DataMgr.h"
+#include "ShareLimiter.h"
+#include "Exception.h"
 #include <iostream>
 
 namespace Stratum
@@ -55,11 +58,23 @@ namespace Stratum
     {
         JSON params = msg["params"];
         
-        std::string username = params[0].GetString();
+        // Share limiter
+        if (!_shareLimiter.Submit()) {
+            JSON response;
+            response["id"] = msg["id"];
+            response["result"];
+            response["error"].Add(int64(20));
+            response["error"].Add("Blocked by share limiter");
+            response["error"].Add(JSON());
+            SendMessage(response);
+            return;
+        }
+        
         uint32 jobid;
         ByteBuffer jobbuf(Util::ASCIIToBin(params[1].GetString()));
         jobbuf >> jobid;
         
+        // Check if such job exists
         if (!_jobs.count(jobid)) {
             JSON response;
             response["id"] = msg["id"];
@@ -72,25 +87,47 @@ namespace Stratum
         }
         
         // check username
+        std::string username = params[0].GetString();
         
         BinaryData extranonce2 = Util::ASCIIToBin(params[2].GetString());
         if (extranonce2.size() != 4) {
             sLog.Error(LOG_SERVER, "Wrong extranonce size");
+            JSON response;
+            response["id"] = msg["id"];
+            response["result"];
+            response["error"].Add(int64(20));
+            response["error"].Add("Wrong extranonce size");
+            response["error"].Add(JSON());
+            SendMessage(response);
             return;
         }
         
         ByteBuffer timebuf(Util::Reverse(Util::ASCIIToBin(params[3].GetString())));
         if (timebuf.Size() != 4) {
             sLog.Error(LOG_SERVER, "Wrong ntime size");
+            JSON response;
+            response["id"] = msg["id"];
+            response["result"];
+            response["error"].Add(int64(20));
+            response["error"].Add("Wrong ntime size");
+            response["error"].Add(JSON());
+            SendMessage(response);
             return;
         }
         
         ByteBuffer noncebuf(Util::Reverse(Util::ASCIIToBin(params[4].GetString())));
         if (noncebuf.Size() != 4) {
             sLog.Error(LOG_SERVER, "Wrong nonce size");
+            JSON response;
+            response["id"] = msg["id"];
+            response["result"];
+            response["error"].Add(int64(20));
+            response["error"].Add("Wrong nonce size");
+            response["error"].Add(JSON());
+            SendMessage(response);
             return;
         }
-        
+    
         // Get job
         Job& job = _jobs[jobid];
         
@@ -98,6 +135,13 @@ namespace Stratum
         share << extranonce2 << timebuf << noncebuf;
         if (!job.SubmitShare(share.Binary())) {
             sLog.Error(LOG_SERVER, "Duplicate share");
+            JSON response;
+            response["id"] = msg["id"];
+            response["result"];
+            response["error"].Add(int64(22));
+            response["error"].Add("Duplicate share");
+            response["error"].Add(JSON());
+            SendMessage(response);
             return;
         }
         
@@ -140,12 +184,34 @@ namespace Stratum
         std::cout << "Criteria: " << criteria << std::endl;
         std::cout << "Diff: " << diff << std::endl;
         
+        // Check if difficulty meets job diff
+        if (target > Bitcoin::DiffToTarget(job.diff)) {
+            sLog.Error(LOG_SERVER, "Share above target");
+            JSON response;
+            response["id"] = msg["id"];
+            response["result"];
+            response["error"].Add(int64(23));
+            response["error"].Add("Share above target");
+            response["error"].Add(JSON());
+            SendMessage(response);
+            return;
+        }
+        
         // Check if block meets criteria
         if (target <= criteria) {
             sLog.Info(LOG_SERVER, "We have found a block candidate!");
             
             _server->SubmitBlock(block);
-        } 
+        } else {
+            sDataMgr.Push(Share(_ip, username, true, "", Util::Date(), job.diff));
+            
+            JSON response;
+            response["id"] = msg["id"];
+            response["result"] = true;
+            response["error"];
+            SendMessage(response);
+            return;
+        }
     }
     
     void Client::OnMiningSubscribe(JSON msg)
@@ -192,6 +258,7 @@ namespace Stratum
     {
         Job job;
         job.block = _server->GetWork();
+        job.diff = 1;
         
         // Serialize transaction
         ByteBuffer coinbasebuf;
@@ -219,6 +286,11 @@ namespace Stratum
             iss << is.rdbuf();
             sLog.Debug(LOG_SERVER, "Received: %s", iss.str().c_str());
             OnMessage(JSON::FromString(iss.str()));
+            /*try {
+                OnMessage(JSON::FromString(iss.str()));
+            } catch (uint64 e) {
+                sLog.Error(LOG_SERVER, "Exception caught while parsing json: %s", e.what());
+            }*/
             
             StartRead();
         } else {
diff --git a/src/server/poolserver/Stratum/Client.h b/src/server/poolserver/Stratum/Client.h
index f6b8027..5136396 100644
--- a/src/server/poolserver/Stratum/Client.h
+++ b/src/server/poolserver/Stratum/Client.h
@@ -2,10 +2,12 @@
 #define STRATUM_CLIENT_H_
 
 #include "Common.h"
+#include "Config.h"
 #include "Log.h"
 #include "JSON.h"
 #include "Server.h"
 #include "Job.h"
+#include "ShareLimiter.h"
 
 #include <boost/asio.hpp>
 #include <boost/bind.hpp>
@@ -24,8 +26,10 @@ namespace Stratum
     class Client : public boost::enable_shared_from_this<Client>
     {
     public:
-        Client(Server* server, asio::io_service& io_service) : _server(server), _socket(io_service), _subscribed(false), _jobid(0)
+        Client(Server* server, asio::io_service& io_service, uint64 id) : _server(server), _socket(io_service), _id(id), _subscribed(false), _jobid(0), _shareLimiter(this)
         {
+            _diff = sConfig.Get<uint32>("StratumMinDifficulty");
+            _minDiff = _diff;
         }
         
         tcp::socket& GetSocket()
@@ -35,6 +39,11 @@ namespace Stratum
         
         void Start()
         {
+            // Get IP
+            tcp::endpoint remote_ep = _socket.remote_endpoint();
+            address remote_ad = remote_ep.address();
+            _ip = remote_ad.to_v4().to_ulong();
+            
             // Start reading socket
             StartRead();
         }
@@ -84,6 +93,36 @@ namespace Stratum
         // Gets new job from the server
         Job GetJob();
         
+        // Worker difficulty
+        uint64 GetDifficulty()
+        {
+            return _diff;
+        }
+        void SetDifficulty(uint64 diff, bool resendJob = false)
+        {
+            _diff = diff;
+            
+            // Send difficulty update
+            JSON params;
+            params.Add(int64(_diff));
+            
+            JSON msg;
+            msg["id"];
+            msg["params"] = params;
+            msg["method"] = "mining.set_difficulty";
+            
+            SendMessage(msg);
+            
+            if (resendJob)
+                SendJob(false);
+        }
+        
+        // Client ID
+        uint64 GetID()
+        {
+            return _id;
+        }
+        
         void Disconnect()
         {
             _socket.close();
@@ -96,6 +135,8 @@ namespace Stratum
         // Networking
         asio::streambuf _recvBuffer;
         tcp::socket _socket;
+        uint32 _ip;
+        uint64 _id;
         
         // Pointer to server
         Stratum::Server* _server;
@@ -108,6 +149,11 @@ namespace Stratum
         uint32 _extranonce;
         std::map<uint64, Job> _jobs;
         uint32 _jobid;
+        
+        // Share limiting
+        uint64 _diff;
+        uint64 _minDiff;
+        ShareLimiter _shareLimiter;
     };
     
     typedef boost::shared_ptr<Client> ClientPtr;
diff --git a/src/server/poolserver/Stratum/Job.h b/src/server/poolserver/Stratum/Job.h
index 6aaff78..2585b45 100644
--- a/src/server/poolserver/Stratum/Job.h
+++ b/src/server/poolserver/Stratum/Job.h
@@ -11,6 +11,7 @@ namespace Stratum
     class Job
     {
     public:
+        uint64 diff;
         Bitcoin::BlockPtr block;
         BinaryData coinbase1;
         BinaryData coinbase2;
diff --git a/src/server/poolserver/Stratum/Server.cpp b/src/server/poolserver/Stratum/Server.cpp
index f5f2f87..1a70e88 100644
--- a/src/server/poolserver/Stratum/Server.cpp
+++ b/src/server/poolserver/Stratum/Server.cpp
@@ -4,9 +4,6 @@ namespace Stratum
 {
     void Server::Start(tcp::endpoint endpoint)
     {
-        // Start block checking timer
-        _CheckBlocksTimer();
-        
         _acceptor.open(endpoint.protocol());
         _acceptor.set_option(tcp::acceptor::reuse_address(true));
         _acceptor.bind(endpoint);
@@ -24,33 +21,15 @@ namespace Stratum
             _io_service.post(boost::bind(&Client::SendMessage, (*it), msg));
     }
     
-    void Server::ResetWork()
+    void Server::SendBlockTmpl(bool resetWork)
     {
         std::set<ClientPtr>::iterator it;
         for (it = _clients.begin(); it != _clients.end(); ++it)
-            _io_service.post(boost::bind(&Client::SendJob, (*it), true));
+            _io_service.post(boost::bind(&Client::SendJob, (*it), resetWork));
     }
     
     bool Server::SubmitBlock(Bitcoin::Block block)
     {
-        // Serialize block
-        ByteBuffer blockbuf;
-        blockbuf << block;
-        
-        try {
-            JSON params;
-            params.Add(Util::BinToASCII(blockbuf.Binary()));
-            JSON response = _bitcoinrpc->Query("submitblock", params);
-            
-            if (response["result"].GetType() == JSON_NULL) {
-                sLog.Info(LOG_STRATUM, "Block accepted! YAY!");
-                _io_service.post(boost::bind(&Server::_CheckBlocks, this));
-                return true;
-            } else {
-                sLog.Info(LOG_STRATUM, "Block rejected! Booooo");
-            }
-        } catch (...) {
-            return false;
-        }
+        return NetworkMgr::Instance()->SubmitBlock(block);
     }
 }
diff --git a/src/server/poolserver/Stratum/Server.h b/src/server/poolserver/Stratum/Server.h
index 32a93fe..c47d3e1 100644
--- a/src/server/poolserver/Stratum/Server.h
+++ b/src/server/poolserver/Stratum/Server.h
@@ -10,6 +10,7 @@
 #include "Bitcoin.h"
 #include "Util.h"
 #include "ByteBuffer.h"
+#include "NetworkMgr.h"
 
 #include <boost/asio.hpp>
 #include <boost/bind.hpp>
@@ -27,12 +28,22 @@ namespace Stratum
         uint16 Port;
     };
     
+    // Used for sorting std::set
+    struct ClientPtrCMP
+    {
+        bool operator() (const ClientPtr& a, const ClientPtr& b)
+        {
+            return a->GetID() < b->GetID();
+        }
+    };
+    
     class Server
     {
     public:
-        Server(asio::io_service& io_service) : _io_service(io_service), _acceptor(io_service), _blockCheckTimer(io_service), _blockHeight(0), _extranonce(0)
+        Server(asio::io_service& io_service) : _io_service(io_service), _acceptor(io_service), _extranonce(0), _clientId(0)
         {
-            _pubkey = Util::ASCIIToBin(sConfig.Get<std::string>("MiningAddress"));
+            // Subscribe for block updates
+            NetworkMgr::Instance()->BlockNotifyBind(boost::bind(&Server::BlockNotify, this, _1, _2));
         }
         
         ~Server()
@@ -45,11 +56,6 @@ namespace Stratum
         // Starts accepting connections
         void Start(tcp::endpoint endpoint);
         
-        void SetBitcoinRPC(JSONRPC* bitcoinrpc)
-        {
-            _bitcoinrpc = bitcoinrpc;
-        }
-        
         // Sends message to all clients
         void SendToAll(JSON msg);
         
@@ -62,12 +68,22 @@ namespace Stratum
         // Returns current work
         Bitcoin::BlockPtr GetWork()
         {
-            boost::lock_guard<boost::mutex> guard(_mtx_workupdate);
+            boost::lock_guard<boost::mutex> guard(_mtxCurrentWork);
             return _currentWork;
         }
         
+        // Block template update event
+        void BlockNotify(Bitcoin::BlockPtr block, bool newBlock)
+        {
+            sLog.Debug(LOG_SERVER, "Received block template update");
+            _mtxCurrentWork.lock();
+            _currentWork = block;
+            _mtxCurrentWork.unlock();
+            SendBlockTmpl(newBlock);
+        }
+        
         // Resets work for all clients
-        void ResetWork();
+        void SendBlockTmpl(bool resetWork);
         
         // Submits block to bitcoind
         bool SubmitBlock(Bitcoin::Block block);
@@ -82,7 +98,7 @@ namespace Stratum
     private:
         void _StartAccept()
         {
-            ClientPtr client = ClientPtr(new Client(this, _io_service));
+            ClientPtr client = ClientPtr(new Client(this, _io_service, _clientId++));
             
             _acceptor.async_accept(client->GetSocket(), boost::bind(&Server::_OnAccept, this, client, asio::placeholders::error));
         }
@@ -90,7 +106,7 @@ namespace Stratum
         void _OnAccept(ClientPtr client, const boost::system::error_code& error)
         {
             if (!error) {
-                sLog.Debug(LOG_STRATUM, "New stratum client accepted");
+                sLog.Debug(LOG_STRATUM, "New stratum client accepted. Total clients: %u", _clients.size());
                 client->Start();
                 _clients.insert(client);
             } else {
@@ -99,117 +115,19 @@ namespace Stratum
             
             _StartAccept();
         }
-        
-        void _UpdateWork(bool reset)
-        {
-            JSON response = _bitcoinrpc->Query("getblocktemplate");
-            
-            Bitcoin::BlockPtr block = Bitcoin::BlockPtr(new Bitcoin::Block());
-            
-            block->version = response["version"].GetInt();
-            block->prevBlockHash = Util::Reverse(Util::ASCIIToBin(response["previousblockhash"].GetString()));
-            block->time = response["curtime"].GetInt();
-            // Set bits
-            ByteBuffer bitbuf(Util::Reverse(Util::ASCIIToBin(response["bits"].GetString())));
-            bitbuf >> block->bits;
-            
-            // Add coinbase tx
-            block->tx.push_back(CreateCoinbaseTX(_blockHeight, _pubkey, response["coinbasevalue"].GetInt()));
-            
-            // Add other transactions
-            JSON trans = response["transactions"];
-            for (uint64 i = 0; i < trans.Size(); ++i) {
-                ByteBuffer txbuf(Util::ASCIIToBin(trans[i]["data"].GetString()));
-                Bitcoin::Transaction tx;
-                txbuf >> tx;
-                block->tx.push_back(tx);
-            }
-            
-            // Genrate merkle tree
-            block->BuildMerkleTree();
-            
-            // Set current work
-            _mtx_workupdate.lock();
-            _currentWork = block;
-            _mtx_workupdate.unlock();
-            
-            // Requests all clients to reset work
-            if (reset)
-                ResetWork();
-        }
-        
-        void _CheckBlocksTimer()
-        {
-            _CheckBlocks();
-            _blockCheckTimer.expires_from_now(boost::posix_time::milliseconds(sConfig.Get<uint32>("StratumBlockCheckTime")));
-            _blockCheckTimer.async_wait(boost::bind(&Server::_CheckBlocksTimer, this));
-        }
-        
-        void _CheckBlocks()
-        {
-            // Might be called twice from timer and when block is found
-            boost::lock_guard<boost::mutex> guard(_mtx_checkblock);
-            
-            sLog.Debug(LOG_STRATUM, "Clients: %u", _clients.size());
-            
-            JSON response = _bitcoinrpc->Query("getinfo");
-            uint32 curBlock = response["blocks"].GetInt();
-            
-            if (curBlock > _blockHeight) {
-                sLog.Debug(LOG_STRATUM, "New block on network! Height: %u", curBlock);
-                _blockHeight = curBlock;
-                _UpdateWork(true);
-            }
-        }
-        
-        Bitcoin::Transaction CreateCoinbaseTX(uint32 blockHeight, BinaryData pubkey, int64 value)
-        {
-            // Extranonce placeholder
-            BinaryData extranonce_ph(8, 0);
-            ByteBuffer scriptsig;
-            scriptsig << _blockHeight << extranonce_ph;
-            
-            Bitcoin::OutPoint outpoint;
-            outpoint.hash.resize(32, 0);
-            outpoint.n = 0xFFFFFFFF;
-            
-            Bitcoin::TxIn txin;
-            txin.prevout = outpoint;
-            txin.script = scriptsig.Binary();
-            txin.n = 0;
-            
-            Bitcoin::TxOut txout;
-            txout.value = value;
-            txout.scriptPubKey = Bitcoin::Script(pubkey) + Bitcoin::OP_CHECKSIG;
-            
-            Bitcoin::Transaction tx;
-            tx.version = 1;
-            tx.in.push_back(txin);
-            tx.out.push_back(txout);
-            tx.lockTime = 0;
-            
-            return tx;
-        }
+
     private:
         // Network
-        std::set<ClientPtr> _clients;
         asio::io_service& _io_service;
         tcp::acceptor _acceptor;
         
-        // Mutexes
-        boost::mutex _mtx_checkblock;
-        boost::mutex _mtx_workupdate;
-        
-        // RPC
-        JSONRPC* _bitcoinrpc;
-        
-        // Bitcoin info
-        BinaryData _pubkey;
-        asio::deadline_timer _blockCheckTimer;
-        uint32 _blockHeight;
+        // Clients
+        std::set<ClientPtr, ClientPtrCMP> _clients;
+        uint64 _clientId;
         
         // Work
         Bitcoin::BlockPtr _currentWork;
+        boost::mutex _mtxCurrentWork;
         uint32 _extranonce;
     };
 }
diff --git a/src/server/poolserver/Stratum/ShareLimiter.cpp b/src/server/poolserver/Stratum/ShareLimiter.cpp
new file mode 100644
index 0000000..567e0c5
--- /dev/null
+++ b/src/server/poolserver/Stratum/ShareLimiter.cpp
@@ -0,0 +1,39 @@
+#include "ShareLimiter.h"
+#include "Server.h"
+#include "Client.h"
+
+namespace Stratum
+{
+    // Returning false will stop any further share verifications (DoS prevention, etc)
+    bool ShareLimiter::Submit()
+    {
+        uint64 curTime = Util::Date();
+        uint64 sinceLast = curTime - _lastRetarget;
+        
+        _shares.push_back(curTime);
+        
+        if (sinceLast < RETARGET_INTERVAL)
+            return true;
+        
+        while (_shares.size() && (_shares.front() < curTime - RETARGET_TIME_BUFFER))
+            _shares.pop_front();
+        
+        uint32 interval = std::min(curTime - _startTime, uint64(RETARGET_TIME_BUFFER));
+        
+        // Calculate shares/min
+        double speed = (_shares.size()*60) / interval;
+        
+        // Calculate difference from pool target in %
+        double variance = (speed - RETARGET_SHARES_PER_MIN) / RETARGET_SHARES_PER_MIN;
+        
+        // Check if we need to retarget
+        if (std::abs(variance)*100 < RETARGET_VARIANCE)
+            return true;
+        
+        uint64 newDiff = double(_client->GetDifficulty()) * variance;
+        
+        _client->SetDifficulty(newDiff, true);
+        
+        return true;
+    }
+}
diff --git a/src/server/poolserver/Stratum/ShareLimiter.h b/src/server/poolserver/Stratum/ShareLimiter.h
new file mode 100644
index 0000000..6e56da5
--- /dev/null
+++ b/src/server/poolserver/Stratum/ShareLimiter.h
@@ -0,0 +1,44 @@
+#ifndef SHARELIMITER_H_
+#define SHARELIMITER_H_
+
+#include "Common.h"
+#include "Util.h"
+
+#include <deque>
+
+#define RETARGET_INTERVAL 60
+#define RETARGET_TIME_BUFFER 60*5
+#define RETARGET_SHARES_PER_MIN 15
+#define RETARGET_VARIANCE 40
+
+namespace Stratum
+{
+    class Client;
+    
+    class ShareLimiterRecord
+    {
+    public:
+        ShareLimiterRecord(uint64 atime, uint64 adiff) : time(atime), diff(adiff) {}
+        uint64 time;
+        uint64 diff;
+    };
+    
+    class ShareLimiter
+    {
+    public:
+        ShareLimiter(Client* client) : _client(client), _lastRetarget(0)
+        {
+            _startTime = Util::Date();
+        }
+        
+        bool Submit();
+        
+    private:
+        std::deque<uint64> _shares;
+        Client* _client;
+        uint64 _lastRetarget;
+        uint64 _startTime;
+    };
+}
+
+#endif
diff --git a/src/server/poolserver/poolserver.cfg.dist b/src/server/poolserver/poolserver.cfg.dist
index 613f56d..3d75dee 100644
--- a/src/server/poolserver/poolserver.cfg.dist
+++ b/src/server/poolserver/poolserver.cfg.dist
@@ -72,9 +72,9 @@ StratumPort=3333
 #        Description: Location to save logfile to
 #        Important:   Do not add trailing slash
 #        Example:     "/var/log"
-#        Default:     "." - (Save log file next to executable)
+#        Default:     "../etc" - (Save log file next to executable)
 
-LogFilePath="."
+LogFilePath="../etc"
 
 #
 #    LogConsoleLevel
@@ -144,7 +144,7 @@ MySQLPort=3306
 #        Description: MySQL Server Username
 #        Default:     "" - (No Username)
 
-MySQLUser=""
+MySQLUser="root"
 
 #
 #    MySQLPass
diff --git a/src/server/shared/Bitcoin/Bitcoin.h b/src/server/shared/Bitcoin/Bitcoin.h
index 3909ee8..eadf469 100644
--- a/src/server/shared/Bitcoin/Bitcoin.h
+++ b/src/server/shared/Bitcoin/Bitcoin.h
@@ -30,6 +30,35 @@ namespace Bitcoin
         mpz_ui_pow_ui(power, 2, 8 * (nbytes - 3));
         return BigInt(bits & 0xFFFFFF) * BigInt(power);
     }
+    
+    inline Transaction CreateCoinbaseTX(uint32 blockHeight, BinaryData pubkey, int64 value)
+    {
+        // Extranonce placeholder
+        BinaryData extranonce_ph(8, 0);
+        ByteBuffer scriptsig;
+        scriptsig << blockHeight << extranonce_ph;
+        
+        Bitcoin::OutPoint outpoint;
+        outpoint.hash.resize(32, 0);
+        outpoint.n = 0xFFFFFFFF;
+        
+        TxIn txin;
+        txin.prevout = outpoint;
+        txin.script = scriptsig.Binary();
+        txin.n = 0;
+        
+        TxOut txout;
+        txout.value = value;
+        txout.scriptPubKey = Bitcoin::Script(pubkey) + Bitcoin::OP_CHECKSIG;
+        
+        Transaction tx;
+        tx.version = 1;
+        tx.in.push_back(txin);
+        tx.out.push_back(txout);
+        tx.lockTime = 0;
+        
+        return tx;
+    }
 }
 
 #endif
diff --git a/src/server/shared/ByteBuffer.h b/src/server/shared/ByteBuffer.h
index fb067c5..0895517 100644
--- a/src/server/shared/ByteBuffer.h
+++ b/src/server/shared/ByteBuffer.h
@@ -69,7 +69,7 @@ public:
         size_t size = sizeof(T);
         
         if (vec.size() < pointer+size)
-            return NULL;
+            return 0;
         
         T data = 0;
         for (uint64 i = 0; i < size; ++i)
diff --git a/src/server/shared/Common.h b/src/server/shared/Common.h
index 8fdbd30..e08f634 100644
--- a/src/server/shared/Common.h
+++ b/src/server/shared/Common.h
@@ -3,6 +3,11 @@
 
 #include <boost/cstdint.hpp>
 #include <vector>
+#include <string>
+#include <cstdio>
+#include <cstdarg>
+
+#define MAX_FORMAT_LEN 32*1024
 
 typedef uint8_t uint8;
 typedef uint16_t uint16;
diff --git a/src/server/shared/Exception.h b/src/server/shared/Exception.h
new file mode 100644
index 0000000..3770aca
--- /dev/null
+++ b/src/server/shared/Exception.h
@@ -0,0 +1,27 @@
+#ifndef EXCEPTION_H_
+#define EXCEPTION_H_
+
+class Exception: public std::exception
+{
+public:
+    Exception(const char *text)
+    {
+        _msg.assign(text);
+    }
+    
+    Exception(std::string text)
+    {
+        _msg.assign(text);
+    }
+    
+    virtual ~Exception() throw () {}
+    
+    virtual const char* what() const throw () {
+       return _msg.c_str();
+    }
+
+protected:
+    std::string _msg;
+};
+
+#endif
diff --git a/src/server/shared/JSON/JSON.h b/src/server/shared/JSON/JSON.h
index cb1db6b..cee5e23 100644
--- a/src/server/shared/JSON/JSON.h
+++ b/src/server/shared/JSON/JSON.h
@@ -2,6 +2,9 @@
 #define JSON_H_
 
 #include "Common.h"
+#include "Log.h"
+#include "Util.h"
+#include "Exception.h"
 #include <boost/property_tree/ptree.hpp>
 #include <boost/property_tree/json_parser.hpp>
 #include <boost/variant.hpp>
@@ -10,7 +13,6 @@
 #include <sstream>
 #include <vector>
 #include <map>
-#include <Log.h>
 
 enum JSONValueType
 {
@@ -25,6 +27,13 @@ enum JSONValueType
 
 typedef boost::variant<bool, int64, double, std::string> JSONValue;
 
+class JSONException: public Exception
+{
+public:
+    JSONException(const char *text): Exception(text) {}
+    JSONException(std::string text): Exception(text) {}
+};
+
 class JSON
 {
 public:
@@ -41,6 +50,9 @@ public:
     // Arrays
     JSON& operator[] (uint32 index)
     {
+        if (index >= _vec.size())
+            throw JSONException(Util::FS("Index %u out of range. Vector size: %u", index, _vec.size()));
+        
         return _vec[index];
     }
     
@@ -49,7 +61,7 @@ public:
     {
         if (_type != JSON_ARRAY) {
             if (_type != JSON_NULL)
-                throw "Bad type";
+                throw JSONException("Node is not an array type");
             else
                 _type = JSON_ARRAY;
         }
@@ -63,7 +75,7 @@ public:
     {
         if (_type != JSON_ARRAY) {
             if (_type != JSON_NULL)
-                throw "Bad type";
+                throw JSONException("Node is not an array type");
             else
                 _type = JSON_ARRAY;
         }
@@ -77,7 +89,7 @@ public:
     {
         if (_type != JSON_OBJECT) {
             if (_type != JSON_NULL)
-                throw "Bad type";
+                throw JSONException("Node is not an object type");
             else
                 _type = JSON_OBJECT;
         }
@@ -95,7 +107,7 @@ public:
     {
         if (_type != JSON_OBJECT) {
             if (_type != JSON_NULL)
-                throw "Bad type";
+                throw JSONException("Node is not an object type");
             else
                 _type = JSON_OBJECT;
         }
@@ -112,7 +124,7 @@ public:
     bool GetBool()
     {
         if (_type != JSON_BOOL)
-            throw "Bad type";
+            throw JSONException("Node is not a bool type");
         
         return boost::get<bool>(_val);
     }
@@ -126,7 +138,7 @@ public:
     int64 GetInt()
     {
         if (_type != JSON_INTEGER)
-            throw "Bad type";
+            throw JSONException("Node is not an int type");
         
         return boost::get<int64>(_val);
     }
@@ -140,7 +152,7 @@ public:
     double GetDouble()
     {
         if (_type != JSON_DOUBLE)
-            throw "Bad type";
+            throw JSONException("Node is not a double type");
         
         return boost::get<double>(_val);
     }
@@ -154,7 +166,7 @@ public:
     std::string GetString()
     {
         if (_type != JSON_STRING)
-            throw "Bad type";
+            throw JSONException("Node is not a string type");
         
         return boost::get<std::string>(_val);
     }
@@ -188,7 +200,7 @@ public:
         else if (_type == JSON_OBJECT)
             return _map.size();
         else
-            throw "Type has no size";
+            return 0;
     }
     
     JSONValueType GetType()
@@ -227,7 +239,7 @@ inline void JSON::Add(JSON& node)
 {
     if (_type != JSON_ARRAY) {
         if (_type != JSON_NULL)
-            throw "Bad type";
+            throw JSONException("Node is not an array type");
         else
             _type = JSON_ARRAY;
     }
diff --git a/src/server/shared/JSON/JSONReader.h b/src/server/shared/JSON/JSONReader.h
index 6b3938e..1af48a0 100644
--- a/src/server/shared/JSON/JSONReader.h
+++ b/src/server/shared/JSON/JSONReader.h
@@ -176,7 +176,8 @@ namespace JSONReader
         std::string::const_iterator begin = str.begin();
         std::string::const_iterator end = str.end();
         
-        qi::phrase_parse(begin, end, g, ascii::space);
+        if (!qi::phrase_parse(begin, end, g, ascii::space))
+            throw JSONException("Failed to parse JSON");
     }
 }
 
diff --git a/src/server/shared/JSONRPC/JSONRPC.cpp b/src/server/shared/JSONRPC/JSONRPC.cpp
index 32a9e95..21d65b2 100644
--- a/src/server/shared/JSONRPC/JSONRPC.cpp
+++ b/src/server/shared/JSONRPC/JSONRPC.cpp
@@ -30,10 +30,9 @@ bool JSONRPC::Connect(JSONRPCConnectionInfo connInfo)
         _sock.connect(_ep, error);
     }
     
-    if (error)
-    {
-        sLog.Error(LOG_JSONRPC, "JSONRPC::Connect(): Error connecting to '%s': %s", _connInfo.Host.c_str(), boost::system::system_error(error).what());
-        return false;
+    if (error) {
+        _sock.close();
+        throw JSONRPCException(Util::FS("JSONRPC::Connect(): Error connecting to '%s': %s", _connInfo.Host.c_str(), boost::system::system_error(error).what()));
     }
     
     _sock.close();
@@ -58,10 +57,9 @@ JSON JSONRPC::Query(std::string method, JSON params)
     _sock.close();
     _sock.connect(_ep, error);
     
-    if (error)
-    {
-        sLog.Error(LOG_JSONRPC, "JSONRPC::Query(): Error connecting to '%s': %s", _connInfo.Host.c_str(), boost::system::system_error(error).what());
-        throw "fail";
+    if (error) {
+        _sock.close();
+        throw JSONRPCException(Util::FS("JSONRPC::Connect(): Error connecting to '%s': %s", _connInfo.Host.c_str(), boost::system::system_error(error).what()));
     }
 
     boost::asio::streambuf request_buf;
@@ -88,16 +86,14 @@ JSON JSONRPC::Query(std::string method, JSON params)
     std::getline(response_stream, status_message);
 
     
-    if (!response_stream || http_version.substr(0, 5) != "HTTP/")
-    {
-        sLog.Error(LOG_JSONRPC, "JSONRPC::Query(): Malformed HTTP Response");
-        throw "fail";
+    if (!response_stream || http_version.substr(0, 5) != "HTTP/") {
+        _sock.close();
+        throw JSONRPCException("JSONRPC::Query(): Malformed HTTP Response");
     }
     
-    if (status_code != 200)
-    {
-        sLog.Error(LOG_JSONRPC, "JSONRPC::Query(): Returned status code: %u", status_code);
-        throw "fail";
+    if (status_code != 200) {
+        _sock.close();
+        throw JSONRPCException(Util::FS("JSONRPC::Query(): Returned status code: %u", status_code));
     }
     
     std::vector<std::string> headers;
@@ -116,13 +112,6 @@ JSON JSONRPC::Query(std::string method, JSON params)
         jsonresponse += oss.str();
     }
     
-    // Read until EOF, writing data to output as we go.
-    /*while (_sock.available() && boost::asio::read(_sock, response, error)){
-        std::ostringstream oss;
-        oss << &response;
-        jsonresponse += oss.str();
-    }*/
-    
     _sock.close();
     
     sLog.Debug(LOG_JSONRPC, "JSONRPC::Query(): JSON Response: %s", jsonresponse.c_str());
diff --git a/src/server/shared/JSONRPC/JSONRPC.h b/src/server/shared/JSONRPC/JSONRPC.h
index c9043de..7c7661a 100644
--- a/src/server/shared/JSONRPC/JSONRPC.h
+++ b/src/server/shared/JSONRPC/JSONRPC.h
@@ -6,7 +6,9 @@
 #include <boost/cstdint.hpp>
 #include <boost/asio.hpp>
 #include <string>
+
 #include "JSON.h"
+#include "Exception.h"
 
 struct JSONRPCConnectionInfo
 {
@@ -17,6 +19,13 @@ struct JSONRPCConnectionInfo
     std::string B64Auth;
 };
 
+class JSONRPCException: public Exception
+{
+public:
+    JSONRPCException(const char *text): Exception(text) {}
+    JSONRPCException(std::string text): Exception(text) {}
+};
+
 class JSONRPC
 {
 public:
diff --git a/src/server/shared/MySQL/DatabaseConnection.cpp b/src/server/shared/MySQL/DatabaseConnection.cpp
index 49678b1..adc6dbc 100644
--- a/src/server/shared/MySQL/DatabaseConnection.cpp
+++ b/src/server/shared/MySQL/DatabaseConnection.cpp
@@ -1,5 +1,6 @@
 #include "DatabaseConnection.h"
 #include "Log.h"
+#include "Util.h"
 
 namespace MySQL
 {
@@ -28,10 +29,7 @@ namespace MySQL
         MYSQL* mysqlInit;
         mysqlInit = mysql_init(NULL);
         if (!mysqlInit)
-        {
-            sLog.Error(LOG_DATABASE, "Could not initialize Mysql connection to database `%s`", _connectionInfo.DB.c_str());
-            return false;
-        }
+            throw ConnectionException(Util::FS("Could not initialize Mysql connection to database `%s`", _connectionInfo.DB.c_str()));
 
         mysql_options(mysqlInit, MYSQL_SET_CHARSET_NAME, "utf8");
 
@@ -51,9 +49,9 @@ namespace MySQL
         }
         else
         {
-            sLog.Error(LOG_DATABASE, "Could not connect to MySQL database at %s: %s\n", _connectionInfo.Host.c_str(), mysql_error(mysqlInit));
+            const char* error = mysql_error(mysqlInit);
             mysql_close(mysqlInit);
-            return false;
+            throw ConnectionException(Util::FS("Could not connect to MySQL database at %s: %s", _connectionInfo.Host.c_str(), mysql_error(mysqlInit)));
         }
     }
 
diff --git a/src/server/shared/MySQL/DatabaseConnection.h b/src/server/shared/MySQL/DatabaseConnection.h
index 3bec214..f6541ce 100644
--- a/src/server/shared/MySQL/DatabaseConnection.h
+++ b/src/server/shared/MySQL/DatabaseConnection.h
@@ -1,14 +1,16 @@
 #ifndef DATABASE_CONNECTION_MYSQL_H_
 #define DATABASE_CONNECTION_MYSQL_H_
 
+#include <boost/thread.hpp>
+#include <mysql.h>
+#include <string>
+
 #include "DatabaseOperation.h"
 #include "DatabaseWorker.h"
 #include "QueryResult.h"
 #include "PreparedStatement.h"
 #include "Log.h"
-
-#include <boost/thread.hpp>
-#include <mysql.h>
+#include "Exception.h"
 
 namespace MySQL
 {
@@ -27,6 +29,13 @@ namespace MySQL
         std::string Pass;
         std::string DB;
     };
+    
+    class ConnectionException: public Exception
+    {
+    public:
+        ConnectionException(const char *text): Exception(text) {}
+        ConnectionException(std::string text): Exception(text) {}
+    };
 
     class DatabaseConnection
     {
diff --git a/src/server/shared/Util.cpp b/src/server/shared/Util.cpp
index 9fed2ac..bd7b251 100644
--- a/src/server/shared/Util.cpp
+++ b/src/server/shared/Util.cpp
@@ -31,6 +31,26 @@ uint32 Util::Date(bool utc)
     return diff.total_seconds();
 }
 
+std::string Util::FS(const char *str, ...)
+{
+    va_list ap;
+    va_start(ap, str);
+
+    char text[MAX_FORMAT_LEN];
+    vsnprintf(text, MAX_FORMAT_LEN, str, ap);
+
+    va_end(ap);
+    
+    return std::string(text);
+}
+
+std::vector<std::string> Util::Explode(std::string input, std::string delim)
+{
+    std::vector<std::string> strs;
+    boost::split(strs, input, boost::is_any_of(delim));
+    return strs;
+}
+
 std::string Util::ToBase64(std::string input, bool linebreaks)
 {
     uint32_t writePaddChars = (3 - input.length() % 3) % 3;
diff --git a/src/server/shared/Util.h b/src/server/shared/Util.h
index 06e58be..9dfbee1 100644
--- a/src/server/shared/Util.h
+++ b/src/server/shared/Util.h
@@ -14,11 +14,14 @@
 #include <boost/archive/iterators/transform_width.hpp>
 #include <boost/archive/iterators/insert_linebreaks.hpp>
 #include <boost/archive/iterators/remove_whitespace.hpp>
+#include <boost/algorithm/string.hpp>
 
 namespace Util
 {
     std::string Date(const char* format, bool utc = false);
     uint32 Date(bool utc = true);
+    std::string FS(const char *str, ...);
+    std::vector<std::string> Explode(std::string input, std::string delim);
     
     template <typename T>
     class SynchronisedQueue