diff --git a/CMakeLists.txt b/CMakeLists.txt
index 682ba5a14..0cd7a80c4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -181,7 +181,6 @@ if (NOT HEADLESS)
 	
 	add_subdirectory(libnatspec)
 	add_subdirectory(libjsqrc)
-	add_subdirectory(libqwebthree)
 	add_subdirectory(alethzero)
 	add_subdirectory(third)
 	add_subdirectory(mix)
diff --git a/alethzero/CMakeLists.txt b/alethzero/CMakeLists.txt
index c18a76c36..9e41260fe 100644
--- a/alethzero/CMakeLists.txt
+++ b/alethzero/CMakeLists.txt
@@ -15,6 +15,8 @@ include_directories(BEFORE ${JSONCPP_INCLUDE_DIRS})
 include_directories(${JSON_RPC_CPP_INCLUDE_DIRS})
 
 qt5_wrap_ui(ui_Main.h Main.ui)
+qt5_wrap_ui(ui_Debugger.h Debugger.ui)
+qt5_wrap_ui(ui_Transact.h Transact.ui)
 
 file(GLOB HEADERS "*.h")
 
@@ -27,15 +29,17 @@ endif ()
 # eth_add_executable is defined in cmake/EthExecutableHelper.cmake
 eth_add_executable(${EXECUTABLE} 
 	ICON alethzero 
-	UI_RESOURCES alethzero.icns Main.ui
+	UI_RESOURCES alethzero.icns Main.ui Debugger.ui Transact.ui
 	WIN_RESOURCES alethzero.rc
 )
 
 add_dependencies(${EXECUTABLE} BuildInfo.h)
 
 target_link_libraries(${EXECUTABLE} Qt5::Core)
+target_link_libraries(${EXECUTABLE} Qt5::Widgets)
+target_link_libraries(${EXECUTABLE} Qt5::WebKit)
+target_link_libraries(${EXECUTABLE} Qt5::WebKitWidgets)
 target_link_libraries(${EXECUTABLE} webthree)
-target_link_libraries(${EXECUTABLE} qwebthree)
 target_link_libraries(${EXECUTABLE} ethereum)
 target_link_libraries(${EXECUTABLE} evm)
 target_link_libraries(${EXECUTABLE} ethcore)
diff --git a/alethzero/Context.cpp b/alethzero/Context.cpp
new file mode 100644
index 000000000..d187e6d47
--- /dev/null
+++ b/alethzero/Context.cpp
@@ -0,0 +1,59 @@
+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	cpp-ethereum is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file Debugger.h
+ * @author Gav Wood <i@gavwood.com>
+ * @date 2015
+ */
+
+#include "Context.h"
+#include <QComboBox>
+#include <libethcore/CommonEth.h>
+using namespace std;
+using namespace dev;
+using namespace dev::eth;
+
+NatSpecFace::~NatSpecFace()
+{
+}
+
+Context::~Context()
+{
+}
+
+void initUnits(QComboBox* _b)
+{
+	for (auto n = (unsigned)units().size(); n-- != 0; )
+		_b->addItem(QString::fromStdString(units()[n].second), n);
+}
+
+vector<KeyPair> keysAsVector(QList<KeyPair> const& keys)
+{
+	auto list = keys.toStdList();
+	return {begin(list), end(list)};
+}
+
+bool sourceIsSolidity(string const& _source)
+{
+	// TODO: Improve this heuristic
+	return (_source.substr(0, 8) == "contract" || _source.substr(0, 5) == "//sol");
+}
+
+bool sourceIsSerpent(string const& _source)
+{
+	// TODO: Improve this heuristic
+	return (_source.substr(0, 5) == "//ser");
+}
diff --git a/alethzero/Context.h b/alethzero/Context.h
new file mode 100644
index 000000000..a2fb1a130
--- /dev/null
+++ b/alethzero/Context.h
@@ -0,0 +1,68 @@
+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	cpp-ethereum is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file Debugger.h
+ * @author Gav Wood <i@gavwood.com>
+ * @date 2015
+ */
+
+#pragma once
+
+#include <string>
+#include <vector>
+#include <QString>
+#include <QList>
+#include <libethcore/CommonEth.h>
+
+class QComboBox;
+
+namespace dev { namespace eth { class StateDiff; } }
+
+#define Small "font-size: small; "
+#define Mono "font-family: Ubuntu Mono, Monospace, Lucida Console, Courier New; font-weight: bold; "
+#define Div(S) "<div style=\"" S "\">"
+#define Span(S) "<span style=\"" S "\">"
+
+void initUnits(QComboBox* _b);
+
+std::vector<dev::KeyPair> keysAsVector(QList<dev::KeyPair> const& _keys);
+
+bool sourceIsSolidity(std::string const& _source);
+bool sourceIsSerpent(std::string const& _source);
+
+class NatSpecFace
+{
+public:
+	virtual ~NatSpecFace();
+
+	virtual void add(dev::h256 const& _contractHash, std::string const& _doc) = 0;
+	virtual std::string retrieve(dev::h256 const& _contractHash) const = 0;
+	virtual std::string getUserNotice(std::string const& json, const dev::bytes& _transactionData) = 0;
+	virtual std::string getUserNotice(dev::h256 const& _contractHash, dev::bytes const& _transactionDacta) = 0;
+};
+
+class Context
+{
+public:
+	virtual ~Context();
+
+	virtual QString pretty(dev::Address _a) const = 0;
+	virtual QString prettyU256(dev::u256 _n) const = 0;
+	virtual QString render(dev::Address _a) const = 0;
+	virtual dev::Address fromString(QString const& _a) const = 0;
+	virtual std::string renderDiff(dev::eth::StateDiff const& _d) const = 0;
+};
+
diff --git a/alethzero/Debugger.cpp b/alethzero/Debugger.cpp
new file mode 100644
index 000000000..93d6b1f6a
--- /dev/null
+++ b/alethzero/Debugger.cpp
@@ -0,0 +1,380 @@
+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	cpp-ethereum is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file Debugger.cpp
+ * @author Gav Wood <i@gavwood.com>
+ * @date 2015
+ */
+
+#include "Debugger.h"
+
+#include <fstream>
+#include <QFileDialog>
+#include <libevm/VM.h>
+#include <libethereum/ExtVM.h>
+#include <libethereum/Executive.h>
+#include "ui_Debugger.h"
+using namespace std;
+using namespace dev;
+using namespace dev::eth;
+
+Debugger::Debugger(Context* _c, QWidget* _parent):
+	QDialog(_parent),
+	ui(new Ui::Debugger),
+	m_context(_c)
+{
+	ui->setupUi(this);
+}
+
+Debugger::~Debugger()
+{
+	delete ui;
+}
+
+void Debugger::init()
+{
+	if (m_session.history.size())
+	{
+		alterDebugStateGroup(true);
+		ui->debugCode->setEnabled(false);
+		ui->debugTimeline->setMinimum(0);
+		ui->debugTimeline->setMaximum(m_session.history.size());
+		ui->debugTimeline->setValue(0);
+	}
+}
+
+void Debugger::populate(dev::eth::Executive& _executive, dev::eth::Transaction const& _transaction)
+{
+	finished();
+	if (m_session.populate(_executive, _transaction))
+		init();
+	update();
+}
+
+bool DebugSession::populate(dev::eth::Executive& _executive, dev::eth::Transaction const& _transaction)
+{
+	try {
+		if (_executive.setup(_transaction))
+			return false;
+	}
+	catch (...)
+	{
+		// Invalid transaction
+		return false;
+	}
+
+	vector<WorldState const*> levels;
+	bytes lastExtCode;
+	bytesConstRef lastData;
+	h256 lastHash;
+	h256 lastDataHash;
+	auto onOp = [&](uint64_t steps, Instruction inst, dev::bigint newMemSize, dev::bigint gasCost, VM* voidVM, ExtVMFace const* voidExt)
+	{
+		VM& vm = *voidVM;
+		ExtVM const& ext = *static_cast<ExtVM const*>(voidExt);
+		if (ext.code != lastExtCode)
+		{
+			lastExtCode = ext.code;
+			lastHash = sha3(lastExtCode);
+			if (!codes.count(lastHash))
+				codes[lastHash] = ext.code;
+		}
+		if (ext.data != lastData)
+		{
+			lastData = ext.data;
+			lastDataHash = sha3(lastData);
+			if (!codes.count(lastDataHash))
+				codes[lastDataHash] = ext.data.toBytes();
+		}
+		if (levels.size() < ext.depth)
+			levels.push_back(&history.back());
+		else
+			levels.resize(ext.depth);
+		history.append(WorldState({steps, ext.myAddress, vm.curPC(), inst, newMemSize, vm.gas(), lastHash, lastDataHash, vm.stack(), vm.memory(), gasCost, ext.state().storage(ext.myAddress), levels}));
+	};
+	_executive.go(onOp);
+	_executive.finalize();
+	return true;
+}
+
+void Debugger::finished()
+{
+	m_session = DebugSession();
+	ui->callStack->clear();
+	ui->debugCode->clear();
+	ui->debugStack->clear();
+	ui->debugMemory->setHtml("");
+	ui->debugStorage->setHtml("");
+	ui->debugStateInfo->setText("");
+	alterDebugStateGroup(false);
+}
+
+void Debugger::update()
+{
+	if (m_session.history.size())
+	{
+		WorldState const& nws = m_session.history[min((int)m_session.history.size() - 1, ui->debugTimeline->value())];
+		WorldState const& ws = ui->callStack->currentRow() > 0 ? *nws.levels[nws.levels.size() - ui->callStack->currentRow()] : nws;
+
+		if (ui->debugTimeline->value() >= m_session.history.size())
+		{
+			if (ws.gasCost > ws.gas)
+				ui->debugMemory->setHtml("<h3>OUT-OF-GAS</h3>");
+			else if (ws.inst == Instruction::RETURN && ws.stack.size() >= 2)
+			{
+				unsigned from = (unsigned)ws.stack.back();
+				unsigned size = (unsigned)ws.stack[ws.stack.size() - 2];
+				unsigned o = 0;
+				bytes out(size, 0);
+				for (; o < size && from + o < ws.memory.size(); ++o)
+					out[o] = ws.memory[from + o];
+				ui->debugMemory->setHtml("<h3>RETURN</h3>" + QString::fromStdString(dev::memDump(out, 16, true)));
+			}
+			else if (ws.inst == Instruction::STOP)
+				ui->debugMemory->setHtml("<h3>STOP</h3>");
+			else if (ws.inst == Instruction::SUICIDE && ws.stack.size() >= 1)
+				ui->debugMemory->setHtml("<h3>SUICIDE</h3>0x" + QString::fromStdString(toString(right160(ws.stack.back()))));
+			else
+				ui->debugMemory->setHtml("<h3>EXCEPTION</h3>");
+
+			ostringstream ss;
+			ss << dec << "EXIT  |  GAS: " << dec << max<dev::bigint>(0, (dev::bigint)ws.gas - ws.gasCost);
+			ui->debugStateInfo->setText(QString::fromStdString(ss.str()));
+			ui->debugStorage->setHtml("");
+			ui->debugCallData->setHtml("");
+			m_session.currentData = h256();
+			ui->callStack->clear();
+			m_session.currentLevels.clear();
+			ui->debugCode->clear();
+			m_session.currentCode = h256();
+			ui->debugStack->setHtml("");
+		}
+		else
+		{
+			if (m_session.currentLevels != nws.levels || !ui->callStack->count())
+			{
+				m_session.currentLevels = nws.levels;
+				ui->callStack->clear();
+				for (unsigned i = 0; i <= nws.levels.size(); ++i)
+				{
+					WorldState const& s = i ? *nws.levels[nws.levels.size() - i] : nws;
+					ostringstream out;
+					out << s.cur.abridged();
+					if (i)
+						out << " " << instructionInfo(s.inst).name << " @0x" << hex << s.curPC;
+					ui->callStack->addItem(QString::fromStdString(out.str()));
+				}
+			}
+
+			if (ws.code != m_session.currentCode)
+			{
+				m_session.currentCode = ws.code;
+				bytes const& code = m_session.codes[ws.code];
+				QListWidget* dc = ui->debugCode;
+				dc->clear();
+				m_session.pcWarp.clear();
+				for (unsigned i = 0; i <= code.size(); ++i)
+				{
+					byte b = i < code.size() ? code[i] : 0;
+					try
+					{
+						QString s = QString::fromStdString(instructionInfo((Instruction)b).name);
+						ostringstream out;
+						out << hex << setw(4) << setfill('0') << i;
+						m_session.pcWarp[i] = dc->count();
+						if (b >= (byte)Instruction::PUSH1 && b <= (byte)Instruction::PUSH32)
+						{
+							unsigned bc = b - (byte)Instruction::PUSH1 + 1;
+							s = "PUSH 0x" + QString::fromStdString(toHex(bytesConstRef(&code[i + 1], bc)));
+							i += bc;
+						}
+						dc->addItem(QString::fromStdString(out.str()) + "  "  + s);
+					}
+					catch (...)
+					{
+						cerr << "Unhandled exception!" << endl << boost::current_exception_diagnostic_information();
+						break;	// probably hit data segment
+					}
+				}
+			}
+
+			if (ws.callData != m_session.currentData)
+			{
+				m_session.currentData = ws.callData;
+				if (ws.callData)
+				{
+					assert(m_session.codes.count(ws.callData));
+					ui->debugCallData->setHtml(QString::fromStdString(dev::memDump(m_session.codes[ws.callData], 16, true)));
+				}
+				else
+					ui->debugCallData->setHtml("");
+			}
+
+			QString stack;
+			for (auto i: ws.stack)
+				stack.prepend("<div>" + m_context->prettyU256(i) + "</div>");
+			ui->debugStack->setHtml(stack);
+			ui->debugMemory->setHtml(QString::fromStdString(dev::memDump(ws.memory, 16, true)));
+			assert(m_session.codes.count(ws.code));
+
+			if (m_session.codes[ws.code].size() >= (unsigned)ws.curPC)
+			{
+				int l = m_session.pcWarp[(unsigned)ws.curPC];
+				ui->debugCode->setCurrentRow(max(0, l - 5));
+				ui->debugCode->setCurrentRow(min(ui->debugCode->count() - 1, l + 5));
+				ui->debugCode->setCurrentRow(l);
+			}
+			else
+				cwarn << "PC (" << (unsigned)ws.curPC << ") is after code range (" << m_session.codes[ws.code].size() << ")";
+
+			ostringstream ss;
+			ss << dec << "STEP: " << ws.steps << "  |  PC: 0x" << hex << ws.curPC << "  :  " << instructionInfo(ws.inst).name << "  |  ADDMEM: " << dec << ws.newMemSize << " words  |  COST: " << dec << ws.gasCost <<  "  |  GAS: " << dec << ws.gas;
+			ui->debugStateInfo->setText(QString::fromStdString(ss.str()));
+			stringstream s;
+			for (auto const& i: ws.storage)
+				s << "@" << m_context->prettyU256(i.first).toStdString() << "&nbsp;&nbsp;&nbsp;&nbsp;" << m_context->prettyU256(i.second).toStdString() << "<br/>";
+			ui->debugStorage->setHtml(QString::fromStdString(s.str()));
+		}
+	}
+}
+
+void Debugger::on_callStack_currentItemChanged()
+{
+	update();
+}
+
+void Debugger::alterDebugStateGroup(bool _enable) const
+{
+	ui->stepOver->setEnabled(_enable);
+	ui->stepInto->setEnabled(_enable);
+	ui->stepOut->setEnabled(_enable);
+	ui->backOver->setEnabled(_enable);
+	ui->backInto->setEnabled(_enable);
+	ui->backOut->setEnabled(_enable);
+	ui->dump->setEnabled(_enable);
+	ui->dumpStorage->setEnabled(_enable);
+	ui->dumpPretty->setEnabled(_enable);
+}
+
+void Debugger::on_debugTimeline_valueChanged()
+{
+	update();
+}
+
+void Debugger::on_stepOver_clicked()
+{
+	if (ui->debugTimeline->value() < m_session.history.size()) {
+		auto l = m_session.history[ui->debugTimeline->value()].levels.size();
+		if ((ui->debugTimeline->value() + 1) < m_session.history.size() && m_session.history[ui->debugTimeline->value() + 1].levels.size() > l)
+		{
+			on_stepInto_clicked();
+			if (m_session.history[ui->debugTimeline->value()].levels.size() > l)
+				on_stepOut_clicked();
+		}
+		else
+			on_stepInto_clicked();
+	}
+}
+
+void Debugger::on_stepInto_clicked()
+{
+	ui->debugTimeline->setValue(ui->debugTimeline->value() + 1);
+	ui->callStack->setCurrentRow(0);
+}
+
+void Debugger::on_stepOut_clicked()
+{
+	if (ui->debugTimeline->value() < m_session.history.size())
+	{
+		auto ls = m_session.history[ui->debugTimeline->value()].levels.size();
+		auto l = ui->debugTimeline->value();
+		for (; l < m_session.history.size() && m_session.history[l].levels.size() >= ls; ++l) {}
+		ui->debugTimeline->setValue(l);
+		ui->callStack->setCurrentRow(0);
+	}
+}
+
+void Debugger::on_backInto_clicked()
+{
+	ui->debugTimeline->setValue(ui->debugTimeline->value() - 1);
+	ui->callStack->setCurrentRow(0);
+}
+
+void Debugger::on_backOver_clicked()
+{
+	auto l = m_session.history[ui->debugTimeline->value()].levels.size();
+	if (ui->debugTimeline->value() > 0 && m_session.history[ui->debugTimeline->value() - 1].levels.size() > l)
+	{
+		on_backInto_clicked();
+		if (m_session.history[ui->debugTimeline->value()].levels.size() > l)
+			on_backOut_clicked();
+	}
+	else
+		on_backInto_clicked();
+}
+
+void Debugger::on_backOut_clicked()
+{
+	if (ui->debugTimeline->value() > 0 && m_session.history.size() > 0)
+	{
+		auto ls = m_session.history[min(ui->debugTimeline->value(), m_session.history.size() - 1)].levels.size();
+		int l = ui->debugTimeline->value();
+		for (; l > 0 && m_session.history[l].levels.size() >= ls; --l) {}
+		ui->debugTimeline->setValue(l);
+		ui->callStack->setCurrentRow(0);
+	}
+}
+
+void Debugger::on_dump_clicked()
+{
+	QString fn = QFileDialog::getSaveFileName(this, "Select file to output EVM trace");
+	ofstream f(fn.toStdString());
+	if (f.is_open())
+		for (WorldState const& ws: m_session.history)
+			f << ws.cur << " " << hex << toHex(dev::toCompactBigEndian(ws.curPC, 1)) << " " << hex << toHex(dev::toCompactBigEndian((int)(byte)ws.inst, 1)) << " " << hex << toHex(dev::toCompactBigEndian((uint64_t)ws.gas, 1)) << endl;
+}
+
+void Debugger::on_dumpPretty_clicked()
+{
+	QString fn = QFileDialog::getSaveFileName(this, "Select file to output EVM trace");
+	ofstream f(fn.toStdString());
+	if (f.is_open())
+		for (WorldState const& ws: m_session.history)
+		{
+			f << endl << "    STACK" << endl;
+			for (auto i: ws.stack)
+				f << (h256)i << endl;
+			f << "    MEMORY" << endl << dev::memDump(ws.memory);
+			f << "    STORAGE" << endl;
+			for (auto const& i: ws.storage)
+				f << showbase << hex << i.first << ": " << i.second << endl;
+			f << dec << ws.levels.size() << " | " << ws.cur << " | #" << ws.steps << " | " << hex << setw(4) << setfill('0') << ws.curPC << " : " << instructionInfo(ws.inst).name << " | " << dec << ws.gas << " | -" << dec << ws.gasCost << " | " << ws.newMemSize << "x32";
+		}
+}
+
+void Debugger::on_dumpStorage_clicked()
+{
+	QString fn = QFileDialog::getSaveFileName(this, "Select file to output EVM trace");
+	ofstream f(fn.toStdString());
+	if (f.is_open())
+		for (WorldState const& ws: m_session.history)
+		{
+			if (ws.inst == Instruction::STOP || ws.inst == Instruction::RETURN || ws.inst == Instruction::SUICIDE)
+				for (auto i: ws.storage)
+					f << toHex(dev::toCompactBigEndian(i.first, 1)) << " " << toHex(dev::toCompactBigEndian(i.second, 1)) << endl;
+			f << ws.cur << " " << hex << toHex(dev::toCompactBigEndian(ws.curPC, 1)) << " " << hex << toHex(dev::toCompactBigEndian((int)(byte)ws.inst, 1)) << " " << hex << toHex(dev::toCompactBigEndian((uint64_t)ws.gas, 1)) << endl;
+		}
+}
diff --git a/alethzero/Debugger.h b/alethzero/Debugger.h
new file mode 100644
index 000000000..370ad6e30
--- /dev/null
+++ b/alethzero/Debugger.h
@@ -0,0 +1,103 @@
+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	cpp-ethereum is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file Debugger.h
+ * @author Gav Wood <i@gavwood.com>
+ * @date 2015
+ */
+
+#pragma once
+
+#include <libdevcore/RLP.h>
+#include <libethcore/CommonEth.h>
+#include <libethereum/State.h>
+#include <libethereum/Executive.h>
+#include <QDialog>
+#include <QMap>
+#include <QList>
+#include "Context.h"
+
+namespace Ui { class Debugger; }
+
+struct WorldState
+{
+	uint64_t steps;
+	dev::Address cur;
+	dev::u256 curPC;
+	dev::eth::Instruction inst;
+	dev::bigint newMemSize;
+	dev::u256 gas;
+	dev::h256 code;
+	dev::h256 callData;
+	dev::u256s stack;
+	dev::bytes memory;
+	dev::bigint gasCost;
+	std::map<dev::u256, dev::u256> storage;
+	std::vector<WorldState const*> levels;
+};
+
+struct DebugSession
+{
+	DebugSession() {}
+
+	bool populate(dev::eth::Executive& _executive, dev::eth::Transaction const& _transaction);
+
+	dev::h256 currentCode;
+	dev::h256 currentData;
+	std::vector<WorldState const*> currentLevels;
+
+	QMap<unsigned, unsigned> pcWarp;
+	QList<WorldState> history;
+
+	std::map<dev::u256, dev::bytes> codes;
+};
+
+class Debugger: public QDialog
+{
+	Q_OBJECT
+
+public:
+	explicit Debugger(Context* _context, QWidget* _parent = 0);
+	~Debugger();
+
+	void populate(dev::eth::Executive& _executive, dev::eth::Transaction const& _transaction);
+
+protected slots:
+	void on_callStack_currentItemChanged();
+	void on_debugTimeline_valueChanged();
+	void on_stepOver_clicked();
+	void on_stepInto_clicked();
+	void on_stepOut_clicked();
+	void on_backOver_clicked();
+	void on_backInto_clicked();
+	void on_backOut_clicked();
+	void on_dump_clicked();
+	void on_dumpPretty_clicked();
+	void on_dumpStorage_clicked();
+	void on_close_clicked() { close(); }
+
+private:
+	void init();
+	void update();
+	void finished();
+
+	void alterDebugStateGroup(bool _enable) const;
+
+	Ui::Debugger* ui;
+
+	DebugSession m_session;
+	Context* m_context;
+};
diff --git a/alethzero/Debugger.ui b/alethzero/Debugger.ui
new file mode 100644
index 000000000..6751655ae
--- /dev/null
+++ b/alethzero/Debugger.ui
@@ -0,0 +1,300 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Debugger</class>
+ <widget class="QDialog" name="Debugger">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>989</width>
+    <height>690</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Dialog</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QFrame" name="frame">
+     <property name="frameShape">
+      <enum>QFrame::NoFrame</enum>
+     </property>
+     <property name="frameShadow">
+      <enum>QFrame::Raised</enum>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout">
+      <property name="leftMargin">
+       <number>0</number>
+      </property>
+      <property name="topMargin">
+       <number>0</number>
+      </property>
+      <property name="rightMargin">
+       <number>0</number>
+      </property>
+      <property name="bottomMargin">
+       <number>0</number>
+      </property>
+      <item>
+       <widget class="QToolButton" name="stepOver">
+        <property name="text">
+         <string>Step Over</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QToolButton" name="stepInto">
+        <property name="text">
+         <string>Step Into</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QToolButton" name="stepOut">
+        <property name="text">
+         <string>Step Out</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QToolButton" name="backOver">
+        <property name="text">
+         <string>Back Over</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QToolButton" name="backInto">
+        <property name="text">
+         <string>Back Into</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QToolButton" name="backOut">
+        <property name="text">
+         <string>Back Out</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <spacer name="horizontalSpacer">
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
+        </property>
+        <property name="sizeHint" stdset="0">
+         <size>
+          <width>40</width>
+          <height>20</height>
+         </size>
+        </property>
+       </spacer>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QSplitter" name="splitter_6">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <widget class="QSplitter" name="splitter_42">
+      <property name="sizePolicy">
+       <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
+        <horstretch>1</horstretch>
+        <verstretch>0</verstretch>
+       </sizepolicy>
+      </property>
+      <property name="orientation">
+       <enum>Qt::Vertical</enum>
+      </property>
+      <widget class="QListWidget" name="debugCode">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="frameShape">
+        <enum>QFrame::NoFrame</enum>
+       </property>
+       <property name="lineWidth">
+        <number>0</number>
+       </property>
+      </widget>
+      <widget class="QListWidget" name="callStack">
+       <property name="font">
+        <font>
+         <family>Ubuntu Mono</family>
+        </font>
+       </property>
+       <property name="frameShape">
+        <enum>QFrame::NoFrame</enum>
+       </property>
+       <property name="lineWidth">
+        <number>0</number>
+       </property>
+      </widget>
+     </widget>
+     <widget class="QSplitter" name="splitter_4">
+      <property name="sizePolicy">
+       <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
+        <horstretch>1</horstretch>
+        <verstretch>0</verstretch>
+       </sizepolicy>
+      </property>
+      <property name="orientation">
+       <enum>Qt::Vertical</enum>
+      </property>
+      <widget class="QTextEdit" name="debugStack">
+       <property name="frameShape">
+        <enum>QFrame::NoFrame</enum>
+       </property>
+       <property name="lineWidth">
+        <number>0</number>
+       </property>
+       <property name="readOnly">
+        <bool>true</bool>
+       </property>
+       <property name="textInteractionFlags">
+        <set>Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
+       </property>
+      </widget>
+      <widget class="QTextEdit" name="debugMemory">
+       <property name="frameShape">
+        <enum>QFrame::NoFrame</enum>
+       </property>
+       <property name="lineWidth">
+        <number>0</number>
+       </property>
+       <property name="readOnly">
+        <bool>true</bool>
+       </property>
+       <property name="textInteractionFlags">
+        <set>Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
+       </property>
+      </widget>
+      <widget class="QTextEdit" name="debugStorage">
+       <property name="frameShape">
+        <enum>QFrame::NoFrame</enum>
+       </property>
+       <property name="lineWidth">
+        <number>0</number>
+       </property>
+       <property name="readOnly">
+        <bool>true</bool>
+       </property>
+       <property name="textInteractionFlags">
+        <set>Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
+       </property>
+      </widget>
+      <widget class="QTextEdit" name="debugCallData">
+       <property name="frameShape">
+        <enum>QFrame::NoFrame</enum>
+       </property>
+       <property name="readOnly">
+        <bool>true</bool>
+       </property>
+      </widget>
+     </widget>
+    </widget>
+   </item>
+   <item>
+    <widget class="QLabel" name="debugStateInfo">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Preferred" vsizetype="Maximum">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <property name="text">
+      <string/>
+     </property>
+     <property name="alignment">
+      <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QSlider" name="debugTimeline">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QFrame" name="frame_2">
+     <property name="frameShape">
+      <enum>QFrame::NoFrame</enum>
+     </property>
+     <property name="frameShadow">
+      <enum>QFrame::Raised</enum>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout_2">
+      <property name="leftMargin">
+       <number>0</number>
+      </property>
+      <property name="topMargin">
+       <number>0</number>
+      </property>
+      <property name="rightMargin">
+       <number>0</number>
+      </property>
+      <property name="bottomMargin">
+       <number>0</number>
+      </property>
+      <item>
+       <widget class="QToolButton" name="dump">
+        <property name="text">
+         <string>Dump</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QToolButton" name="dumpStorage">
+        <property name="text">
+         <string>Dump Storage</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QToolButton" name="dumpPretty">
+        <property name="text">
+         <string>Dump Pretty</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <spacer name="horizontalSpacer_2">
+        <property name="orientation">
+         <enum>Qt::Horizontal</enum>
+        </property>
+        <property name="sizeHint" stdset="0">
+         <size>
+          <width>577</width>
+          <height>20</height>
+         </size>
+        </property>
+       </spacer>
+      </item>
+      <item>
+       <widget class="QToolButton" name="close">
+        <property name="text">
+         <string>Close</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/alethzero/Main.ui b/alethzero/Main.ui
index 328b4acba..b7c4f6c96 100644
--- a/alethzero/Main.ui
+++ b/alethzero/Main.ui
@@ -117,7 +117,7 @@
      <x>0</x>
      <y>0</y>
      <width>1617</width>
-     <height>25</height>
+     <height>24</height>
     </rect>
    </property>
    <widget class="QMenu" name="menu_File">
@@ -140,11 +140,12 @@
    </widget>
    <widget class="QMenu" name="menu_Tools">
     <property name="title">
-     <string>T&amp;ools</string>
+     <string>&amp;Tools</string>
     </property>
     <addaction name="mine"/>
     <addaction name="separator"/>
-    <addaction name="create"/>
+    <addaction name="newTransaction"/>
+    <addaction name="newAccount"/>
     <addaction name="importKey"/>
     <addaction name="importKeyFile"/>
     <addaction name="exportKey"/>
@@ -160,18 +161,14 @@
    </widget>
    <widget class="QMenu" name="menu_Debug">
     <property name="title">
-     <string>Deb&amp;ug</string>
+     <string>&amp;Special</string>
     </property>
-    <addaction name="debugDumpState"/>
-    <addaction name="debugDumpStatePre"/>
-    <addaction name="separator"/>
     <addaction name="paranoia"/>
     <addaction name="clearPending"/>
     <addaction name="killBlockchain"/>
     <addaction name="inject"/>
     <addaction name="forceMining"/>
     <addaction name="turboMining"/>
-    <addaction name="enableOptimizer"/>
     <addaction name="separator"/>
     <addaction name="usePrivate"/>
     <addaction name="jitvm"/>
@@ -185,42 +182,28 @@
     <addaction name="separator"/>
     <addaction name="preview"/>
    </widget>
-   <widget class="QMenu" name="menuDebugger">
-    <property name="title">
-     <string>D&amp;ebugger</string>
-    </property>
-    <widget class="QMenu" name="menu_Dump_Trace">
-     <property name="title">
-      <string>&amp;Dump Trace</string>
-     </property>
-     <addaction name="dumpTrace"/>
-     <addaction name="dumpTraceStorage"/>
-     <addaction name="dumpTracePretty"/>
-    </widget>
-    <addaction name="debugCurrent"/>
-    <addaction name="menu_Dump_Trace"/>
-    <addaction name="separator"/>
-    <addaction name="debugStep"/>
-    <addaction name="debugStepInto"/>
-    <addaction name="debugStepOut"/>
-    <addaction name="debugStepBack"/>
-    <addaction name="debugStepBackInto"/>
-    <addaction name="debugStepBackOut"/>
-   </widget>
    <widget class="QMenu" name="menuWhispe">
     <property name="title">
      <string>&amp;Whisper</string>
     </property>
     <addaction name="newIdentity"/>
    </widget>
+   <widget class="QMenu" name="menuDebug">
+    <property name="title">
+     <string>&amp;Debug</string>
+    </property>
+    <addaction name="debugCurrent"/>
+    <addaction name="debugDumpState"/>
+    <addaction name="debugDumpStatePre"/>
+   </widget>
    <addaction name="menu_File"/>
    <addaction name="menu_View"/>
    <addaction name="menu_Network"/>
    <addaction name="menu_Tools"/>
-   <addaction name="menuDebugger"/>
    <addaction name="menuWhispe"/>
-   <addaction name="menu_Debug"/>
+   <addaction name="menuDebug"/>
    <addaction name="menu_Help"/>
+   <addaction name="menu_Debug"/>
   </widget>
   <widget class="QStatusBar" name="statusbar"/>
   <widget class="QDockWidget" name="dockWidget_2">
@@ -533,237 +516,11 @@
     <bool>false</bool>
    </attribute>
    <addaction name="go"/>
+   <addaction name="newTransaction"/>
    <addaction name="preview"/>
    <addaction name="mine"/>
    <addaction name="refresh"/>
   </widget>
-  <widget class="QDockWidget" name="dockWidget_5">
-   <property name="sizePolicy">
-    <sizepolicy hsizetype="Preferred" vsizetype="MinimumExpanding">
-     <horstretch>0</horstretch>
-     <verstretch>0</verstretch>
-    </sizepolicy>
-   </property>
-   <property name="minimumSize">
-    <size>
-     <width>510</width>
-     <height>386</height>
-    </size>
-   </property>
-   <property name="features">
-    <set>QDockWidget::DockWidgetFeatureMask</set>
-   </property>
-   <property name="windowTitle">
-    <string>Transact</string>
-   </property>
-   <attribute name="dockWidgetArea">
-    <number>1</number>
-   </attribute>
-   <widget class="QWidget" name="dockWidgetContents_5">
-    <layout class="QGridLayout" name="gridLayout">
-     <item row="4" column="0">
-      <widget class="QLabel" name="label_2">
-       <property name="sizePolicy">
-        <sizepolicy hsizetype="Preferred" vsizetype="Maximum">
-         <horstretch>0</horstretch>
-         <verstretch>0</verstretch>
-        </sizepolicy>
-       </property>
-       <property name="text">
-        <string>&amp;Data</string>
-       </property>
-       <property name="alignment">
-        <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignVCenter</set>
-       </property>
-       <property name="buddy">
-        <cstring>data</cstring>
-       </property>
-      </widget>
-     </item>
-     <item row="5" column="0" colspan="4">
-      <widget class="QSplitter" name="splitter_5">
-       <property name="orientation">
-        <enum>Qt::Vertical</enum>
-       </property>
-       <widget class="QPlainTextEdit" name="data">
-        <property name="frameShape">
-         <enum>QFrame::NoFrame</enum>
-        </property>
-        <property name="lineWidth">
-         <number>0</number>
-        </property>
-       </widget>
-       <widget class="QTextEdit" name="code">
-        <property name="focusPolicy">
-         <enum>Qt::ClickFocus</enum>
-        </property>
-        <property name="frameShape">
-         <enum>QFrame::NoFrame</enum>
-        </property>
-        <property name="lineWidth">
-         <number>0</number>
-        </property>
-        <property name="readOnly">
-         <bool>true</bool>
-        </property>
-       </widget>
-      </widget>
-     </item>
-     <item row="3" column="0">
-      <widget class="QLabel" name="label_6">
-       <property name="text">
-        <string>&amp;Gas</string>
-       </property>
-       <property name="buddy">
-        <cstring>gas</cstring>
-       </property>
-      </widget>
-     </item>
-     <item row="0" column="0">
-      <widget class="QLabel" name="label5">
-       <property name="sizePolicy">
-        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
-         <horstretch>0</horstretch>
-         <verstretch>0</verstretch>
-        </sizepolicy>
-       </property>
-       <property name="text">
-        <string>&amp;To</string>
-       </property>
-       <property name="buddy">
-        <cstring>destination</cstring>
-       </property>
-      </widget>
-     </item>
-     <item row="3" column="1">
-      <widget class="QSpinBox" name="gas">
-       <property name="suffix">
-        <string> gas</string>
-       </property>
-       <property name="minimum">
-        <number>1</number>
-       </property>
-       <property name="maximum">
-        <number>430000000</number>
-       </property>
-       <property name="value">
-        <number>10000</number>
-       </property>
-      </widget>
-     </item>
-     <item row="2" column="3">
-      <widget class="QComboBox" name="valueUnits"/>
-     </item>
-     <item row="3" column="3">
-      <widget class="QComboBox" name="gasPriceUnits"/>
-     </item>
-     <item row="3" column="2">
-      <widget class="QSpinBox" name="gasPrice">
-       <property name="prefix">
-        <string>@ </string>
-       </property>
-       <property name="minimum">
-        <number>1</number>
-       </property>
-       <property name="maximum">
-        <number>430000000</number>
-       </property>
-      </widget>
-     </item>
-     <item row="1" column="1" colspan="3">
-      <widget class="QLineEdit" name="calculatedName">
-       <property name="enabled">
-        <bool>false</bool>
-       </property>
-       <property name="readOnly">
-        <bool>true</bool>
-       </property>
-       <property name="placeholderText">
-        <string/>
-       </property>
-      </widget>
-     </item>
-     <item row="2" column="1" colspan="2">
-      <widget class="QSpinBox" name="value">
-       <property name="suffix">
-        <string/>
-       </property>
-       <property name="maximum">
-        <number>430000000</number>
-       </property>
-       <property name="value">
-        <number>0</number>
-       </property>
-      </widget>
-     </item>
-     <item row="2" column="0">
-      <widget class="QLabel" name="label5_2">
-       <property name="text">
-        <string>&amp;Amount</string>
-       </property>
-       <property name="buddy">
-        <cstring>value</cstring>
-       </property>
-      </widget>
-     </item>
-     <item row="4" column="1" colspan="3">
-      <widget class="QLabel" name="fee">
-       <property name="sizePolicy">
-        <sizepolicy hsizetype="MinimumExpanding" vsizetype="Preferred">
-         <horstretch>0</horstretch>
-         <verstretch>0</verstretch>
-        </sizepolicy>
-       </property>
-       <property name="text">
-        <string/>
-       </property>
-       <property name="alignment">
-        <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
-       </property>
-      </widget>
-     </item>
-     <item row="0" column="1" colspan="3">
-      <widget class="QComboBox" name="destination">
-       <property name="editable">
-        <bool>true</bool>
-       </property>
-       <item>
-        <property name="text">
-         <string>(Create Contract)</string>
-        </property>
-       </item>
-      </widget>
-     </item>
-     <item row="6" column="3">
-      <widget class="QPushButton" name="send">
-       <property name="text">
-        <string>&amp;Execute</string>
-       </property>
-      </widget>
-     </item>
-     <item row="6" column="0" colspan="2">
-      <widget class="QLabel" name="total">
-       <property name="sizePolicy">
-        <sizepolicy hsizetype="MinimumExpanding" vsizetype="Preferred">
-         <horstretch>0</horstretch>
-         <verstretch>0</verstretch>
-        </sizepolicy>
-       </property>
-       <property name="text">
-        <string/>
-       </property>
-      </widget>
-     </item>
-     <item row="6" column="2">
-      <widget class="QPushButton" name="debug">
-       <property name="text">
-        <string>De&amp;bug</string>
-       </property>
-      </widget>
-     </item>
-    </layout>
-   </widget>
-  </widget>
   <widget class="QDockWidget" name="dockWidget_7">
    <property name="features">
     <set>QDockWidget::DockWidgetFeatureMask</set>
@@ -987,171 +744,6 @@
     </layout>
    </widget>
   </widget>
-  <widget class="QDockWidget" name="dockWidget_9">
-   <property name="floating">
-    <bool>false</bool>
-   </property>
-   <property name="features">
-    <set>QDockWidget::DockWidgetFeatureMask</set>
-   </property>
-   <property name="windowTitle">
-    <string>Debugger</string>
-   </property>
-   <attribute name="dockWidgetArea">
-    <number>1</number>
-   </attribute>
-   <widget class="QWidget" name="debugPanel">
-    <property name="enabled">
-     <bool>false</bool>
-    </property>
-    <layout class="QVBoxLayout" name="verticalLayout_4">
-     <property name="spacing">
-      <number>6</number>
-     </property>
-     <property name="leftMargin">
-      <number>0</number>
-     </property>
-     <property name="topMargin">
-      <number>0</number>
-     </property>
-     <property name="rightMargin">
-      <number>0</number>
-     </property>
-     <property name="bottomMargin">
-      <number>0</number>
-     </property>
-     <item>
-      <widget class="QSplitter" name="splitter_6">
-       <property name="orientation">
-        <enum>Qt::Horizontal</enum>
-       </property>
-       <widget class="QSplitter" name="splitter_42">
-        <property name="sizePolicy">
-         <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
-          <horstretch>1</horstretch>
-          <verstretch>0</verstretch>
-         </sizepolicy>
-        </property>
-        <property name="orientation">
-         <enum>Qt::Vertical</enum>
-        </property>
-        <widget class="QListWidget" name="debugCode">
-         <property name="sizePolicy">
-          <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
-           <horstretch>0</horstretch>
-           <verstretch>0</verstretch>
-          </sizepolicy>
-         </property>
-         <property name="frameShape">
-          <enum>QFrame::NoFrame</enum>
-         </property>
-         <property name="lineWidth">
-          <number>0</number>
-         </property>
-        </widget>
-        <widget class="QListWidget" name="callStack">
-         <property name="font">
-          <font>
-           <family>Ubuntu Mono</family>
-          </font>
-         </property>
-         <property name="frameShape">
-          <enum>QFrame::NoFrame</enum>
-         </property>
-         <property name="lineWidth">
-          <number>0</number>
-         </property>
-        </widget>
-       </widget>
-       <widget class="QSplitter" name="splitter_4">
-        <property name="sizePolicy">
-         <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
-          <horstretch>1</horstretch>
-          <verstretch>0</verstretch>
-         </sizepolicy>
-        </property>
-        <property name="orientation">
-         <enum>Qt::Vertical</enum>
-        </property>
-        <widget class="QTextEdit" name="debugStack">
-         <property name="frameShape">
-          <enum>QFrame::NoFrame</enum>
-         </property>
-         <property name="lineWidth">
-          <number>0</number>
-         </property>
-         <property name="readOnly">
-          <bool>true</bool>
-         </property>
-         <property name="textInteractionFlags">
-          <set>Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
-         </property>
-        </widget>
-        <widget class="QTextEdit" name="debugMemory">
-         <property name="frameShape">
-          <enum>QFrame::NoFrame</enum>
-         </property>
-         <property name="lineWidth">
-          <number>0</number>
-         </property>
-         <property name="readOnly">
-          <bool>true</bool>
-         </property>
-         <property name="textInteractionFlags">
-          <set>Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
-         </property>
-        </widget>
-        <widget class="QTextEdit" name="debugStorage">
-         <property name="frameShape">
-          <enum>QFrame::NoFrame</enum>
-         </property>
-         <property name="lineWidth">
-          <number>0</number>
-         </property>
-         <property name="readOnly">
-          <bool>true</bool>
-         </property>
-         <property name="textInteractionFlags">
-          <set>Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
-         </property>
-        </widget>
-        <widget class="QTextEdit" name="debugCallData">
-         <property name="frameShape">
-          <enum>QFrame::NoFrame</enum>
-         </property>
-         <property name="readOnly">
-          <bool>true</bool>
-         </property>
-        </widget>
-       </widget>
-      </widget>
-     </item>
-     <item>
-      <widget class="QLabel" name="debugStateInfo">
-       <property name="sizePolicy">
-        <sizepolicy hsizetype="Preferred" vsizetype="Maximum">
-         <horstretch>0</horstretch>
-         <verstretch>0</verstretch>
-        </sizepolicy>
-       </property>
-       <property name="text">
-        <string/>
-       </property>
-       <property name="alignment">
-        <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
-       </property>
-      </widget>
-     </item>
-     <item>
-      <widget class="QSlider" name="debugTimeline">
-       <property name="orientation">
-        <enum>Qt::Horizontal</enum>
-       </property>
-      </widget>
-     </item>
-    </layout>
-   </widget>
-  </widget>
   <widget class="QDockWidget" name="dockWidget_10">
    <property name="features">
     <set>QDockWidget::DockWidgetFeatureMask</set>
@@ -1566,9 +1158,6 @@ font-size: 14pt</string>
        <property name="alignment">
         <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignVCenter</set>
        </property>
-       <property name="buddy">
-        <cstring>data</cstring>
-       </property>
       </widget>
      </item>
      <item row="3" column="1" colspan="4">
@@ -1621,9 +1210,6 @@ font-size: 14pt</string>
        <property name="text">
         <string>TTL</string>
        </property>
-       <property name="buddy">
-        <cstring>destination</cstring>
-       </property>
       </widget>
      </item>
      <item row="1" column="0">
@@ -1637,9 +1223,6 @@ font-size: 14pt</string>
        <property name="text">
         <string>From</string>
        </property>
-       <property name="buddy">
-        <cstring>destination</cstring>
-       </property>
       </widget>
      </item>
      <item row="0" column="0">
@@ -1653,9 +1236,6 @@ font-size: 14pt</string>
        <property name="text">
         <string>To</string>
        </property>
-       <property name="buddy">
-        <cstring>destination</cstring>
-       </property>
       </widget>
      </item>
      <item row="1" column="1" colspan="4">
@@ -1686,9 +1266,6 @@ font-size: 14pt</string>
        <property name="alignment">
         <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignVCenter</set>
        </property>
-       <property name="buddy">
-        <cstring>data</cstring>
-       </property>
       </widget>
      </item>
      <item row="2" column="1">
@@ -1715,9 +1292,6 @@ font-size: 14pt</string>
        <property name="text">
         <string>Work to Prove</string>
        </property>
-       <property name="buddy">
-        <cstring>destination</cstring>
-       </property>
       </widget>
      </item>
     </layout>
@@ -1776,7 +1350,7 @@ font-size: 14pt</string>
     <bool>true</bool>
    </property>
    <property name="text">
-    <string>Use &amp;UPnP</string>
+    <string>&amp;Use UPnP</string>
    </property>
   </action>
   <action name="connect">
@@ -1800,9 +1374,9 @@ font-size: 14pt</string>
     <string>&amp;Mine</string>
    </property>
   </action>
-  <action name="create">
+  <action name="newAccount">
    <property name="text">
-    <string>&amp;New Address</string>
+    <string>&amp;New Address...</string>
    </property>
   </action>
   <action name="about">
@@ -1834,7 +1408,7 @@ font-size: 14pt</string>
     <bool>true</bool>
    </property>
    <property name="text">
-    <string>Mining &amp;Paranoia</string>
+    <string>&amp;Mining Paranoia</string>
    </property>
   </action>
   <action name="killBlockchain">
@@ -1862,7 +1436,7 @@ font-size: 14pt</string>
     <bool>true</bool>
    </property>
    <property name="text">
-    <string>Show Ancient &amp;Blocks</string>
+    <string>&amp;Show Ancient Blocks</string>
    </property>
   </action>
   <action name="showAllAccounts">
@@ -1870,7 +1444,7 @@ font-size: 14pt</string>
     <bool>true</bool>
    </property>
    <property name="text">
-    <string>Show Anonymous &amp;Accounts</string>
+    <string>Show &amp;Anonymous Accounts</string>
    </property>
   </action>
   <action name="usePast">
@@ -1970,7 +1544,7 @@ font-size: 14pt</string>
     <bool>false</bool>
    </property>
    <property name="text">
-    <string>Debu&amp;g Current Transaction</string>
+    <string>&amp;Debug Current Transaction</string>
    </property>
   </action>
   <action name="debugDumpState">
@@ -1978,7 +1552,7 @@ font-size: 14pt</string>
     <bool>false</bool>
    </property>
    <property name="text">
-    <string>D&amp;ump Current Transaction State (post)</string>
+    <string>Dump &amp;Current Transaction State (post)</string>
    </property>
   </action>
   <action name="debugDumpStatePre">
@@ -1986,7 +1560,7 @@ font-size: 14pt</string>
     <bool>false</bool>
    </property>
    <property name="text">
-    <string>D&amp;ump Current Transaction State (pre)</string>
+    <string>Dump Current &amp;Transaction State (pre)</string>
    </property>
   </action>
   <action name="dumpTracePretty">
@@ -2007,7 +1581,7 @@ font-size: 14pt</string>
     <bool>true</bool>
    </property>
    <property name="text">
-    <string>&amp;Use Private Chain...</string>
+    <string>Use &amp;Private Chain...</string>
    </property>
   </action>
   <action name="enableOptimizer">
@@ -2015,7 +1589,7 @@ font-size: 14pt</string>
     <bool>true</bool>
    </property>
    <property name="text">
-    <string>&amp;Enable LLL &amp;Optimizer</string>
+    <string>&amp;Enable LLL Optimizer</string>
    </property>
   </action>
   <action name="turboMining">
@@ -2023,7 +1597,7 @@ font-size: 14pt</string>
     <bool>true</bool>
    </property>
    <property name="text">
-    <string>Reserved Debug 1</string>
+    <string>&amp;Reserved Debug 1</string>
    </property>
   </action>
   <action name="localNetworking">
@@ -2031,7 +1605,7 @@ font-size: 14pt</string>
     <bool>true</bool>
    </property>
    <property name="text">
-    <string>Enable Local Addresses</string>
+    <string>&amp;Enable Local Addresses</string>
    </property>
   </action>
   <action name="importKeyFile">
@@ -2044,7 +1618,7 @@ font-size: 14pt</string>
   </action>
   <action name="go">
    <property name="text">
-    <string>Go!</string>
+    <string>&amp;Go!</string>
    </property>
   </action>
   <action name="newIdentity">
@@ -2054,7 +1628,7 @@ font-size: 14pt</string>
   </action>
   <action name="clearPending">
    <property name="text">
-    <string>Clear Pe&amp;nd&amp;ing</string>
+    <string>&amp;Clear Pending</string>
    </property>
   </action>
   <action name="jitvm">
@@ -2073,6 +1647,11 @@ font-size: 14pt</string>
     <string>&amp;Kill Account</string>
    </property>
   </action>
+  <action name="newTransaction">
+   <property name="text">
+    <string>New &amp;Transaction...</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <customwidgets>
@@ -2095,27 +1674,30 @@ font-size: 14pt</string>
   </customwidget>
  </customwidgets>
  <tabstops>
-  <tabstop>destination</tabstop>
-  <tabstop>calculatedName</tabstop>
-  <tabstop>value</tabstop>
-  <tabstop>valueUnits</tabstop>
-  <tabstop>gas</tabstop>
-  <tabstop>gasPrice</tabstop>
-  <tabstop>gasPriceUnits</tabstop>
-  <tabstop>data</tabstop>
-  <tabstop>send</tabstop>
-  <tabstop>idealPeers</tabstop>
-  <tabstop>port</tabstop>
-  <tabstop>clientName</tabstop>
+  <tabstop>shhTo</tabstop>
+  <tabstop>shhFrom</tabstop>
+  <tabstop>shhTtl</tabstop>
+  <tabstop>shhTopic</tabstop>
+  <tabstop>shhWork</tabstop>
+  <tabstop>shhData</tabstop>
+  <tabstop>log</tabstop>
+  <tabstop>post</tabstop>
   <tabstop>verbosity</tabstop>
+  <tabstop>jsConsole</tabstop>
   <tabstop>tabWidget</tabstop>
   <tabstop>urlEdit</tabstop>
   <tabstop>webView</tabstop>
+  <tabstop>idealPeers</tabstop>
+  <tabstop>forceAddress</tabstop>
+  <tabstop>port</tabstop>
+  <tabstop>clientName</tabstop>
+  <tabstop>transactionQueue</tabstop>
+  <tabstop>pendingInfo</tabstop>
+  <tabstop>blockChainFilter</tabstop>
   <tabstop>nameReg</tabstop>
-  <tabstop>debugCode</tabstop>
-  <tabstop>debugStack</tabstop>
-  <tabstop>debugMemory</tabstop>
-  <tabstop>debugStorage</tabstop>
+  <tabstop>nodes</tabstop>
+  <tabstop>whispers</tabstop>
+  <tabstop>jsInput</tabstop>
  </tabstops>
  <resources/>
  <connections/>
diff --git a/alethzero/MainWin.cpp b/alethzero/MainWin.cpp
index 397b2330c..00fb29e2d 100644
--- a/alethzero/MainWin.cpp
+++ b/alethzero/MainWin.cpp
@@ -50,11 +50,14 @@
 #include <libethereum/EthereumHost.h>
 #include <libethereum/DownloadMan.h>
 #include <libweb3jsonrpc/WebThreeStubServer.h>
+#include <jsonrpccpp/server/connectors/httpserver.h>
 #include "MainWin.h"
 #include "DownloadView.h"
 #include "MiningView.h"
 #include "BuildInfo.h"
 #include "OurWebThreeStubServer.h"
+#include "Transact.h"
+#include "Debugger.h"
 #include "ui_Main.h"
 using namespace std;
 using namespace dev;
@@ -62,17 +65,6 @@ using namespace dev::p2p;
 using namespace dev::eth;
 namespace js = json_spirit;
 
-#define Small "font-size: small; "
-#define Mono "font-family: Ubuntu Mono, Monospace, Lucida Console, Courier New; font-weight: bold; "
-#define Div(S) "<div style=\"" S "\">"
-#define Span(S) "<span style=\"" S "\">"
-
-static void initUnits(QComboBox* _b)
-{
-	for (auto n = (unsigned)units().size(); n-- != 0; )
-		_b->addItem(QString::fromStdString(units()[n].second), n);
-}
-
 QString Main::fromRaw(h256 _n, unsigned* _inc)
 {
 	if (_n)
@@ -98,12 +90,6 @@ QString Main::fromRaw(h256 _n, unsigned* _inc)
 	return QString();
 }
 
-static vector<KeyPair> keysAsVector(QList<KeyPair> const& keys)
-{
-	auto list = keys.toStdList();
-	return {begin(list), end(list)};
-}
-
 QString contentsOfQResource(string const& res)
 {
 	QFile file(QString::fromStdString(res));
@@ -119,7 +105,8 @@ Address c_newConfig = Address("c6d9d2cd449a754c494264e1809c50e34d64562b");
 
 Main::Main(QWidget *parent) :
 	QMainWindow(parent),
-	ui(new Ui::Main)
+	ui(new Ui::Main),
+	m_transact(this, this)
 {
 	setWindowFlags(Qt::Window);
 	ui->setupUi(this);
@@ -148,12 +135,6 @@ Main::Main(QWidget *parent) :
 
 	ui->configDock->close();
 	on_verbosity_valueChanged();
-	initUnits(ui->gasPriceUnits);
-	initUnits(ui->valueUnits);
-	ui->valueUnits->setCurrentIndex(6);
-	ui->gasPriceUnits->setCurrentIndex(4);
-	ui->gasPrice->setValue(10);
-	on_destination_currentTextChanged();
 
 	statusBar()->addPermanentWidget(ui->balance);
 	statusBar()->addPermanentWidget(ui->peerCount);
@@ -167,25 +148,26 @@ Main::Main(QWidget *parent) :
 	bytesConstRef network((byte*)m_networkConfig.data(), m_networkConfig.size());
 	m_webThree.reset(new WebThreeDirect(string("AlethZero/v") + dev::Version + "/" DEV_QUOTED(ETH_BUILD_TYPE) "/" DEV_QUOTED(ETH_BUILD_PLATFORM), getDataDir() + "/AlethZero", false, {"eth", "shh"}, p2p::NetworkPreferences(), network));
 
-	m_qwebConnector.reset(new QWebThreeConnector());
-	m_server.reset(new OurWebThreeStubServer(*m_qwebConnector, *web3(), keysAsVector(m_myKeys), this));
+	m_httpConnector.reset(new jsonrpc::HttpServer(8080));
+	m_server.reset(new OurWebThreeStubServer(*m_httpConnector, *web3(), keysAsVector(m_myKeys), this));
 	connect(&*m_server, SIGNAL(onNewId(QString)), SLOT(addNewId(QString)));
 	m_server->setIdentities(keysAsVector(owned()));
 	m_server->StartListening();
 
 	connect(ui->webView, &QWebView::loadStarted, [this]()
 	{
-		// NOTE: no need to delete as QETH_INSTALL_JS_NAMESPACE adopts it.
-		m_qweb = new QWebThree(this);
-		auto qweb = m_qweb;
-		m_qwebConnector->setQWeb(qweb);
-
 		QWebSettings::globalSettings()->setAttribute(QWebSettings::DeveloperExtrasEnabled, true);
 		QWebFrame* f = ui->webView->page()->mainFrame();
 		f->disconnect(SIGNAL(javaScriptWindowObjectCleared()));
 		
-		connect(f, &QWebFrame::javaScriptWindowObjectCleared, QETH_INSTALL_JS_NAMESPACE(f, this, qweb));
-		connect(m_qweb, SIGNAL(onNewId(QString)), this, SLOT(addNewId(QString)));
+		connect(f, &QWebFrame::javaScriptWindowObjectCleared, [f, this]()
+		{
+			f->disconnect();
+			f->addToJavaScriptWindowObject("env", this, QWebFrame::QtOwnership);
+			f->evaluateJavaScript(contentsOfQResource(":/js/bignumber.min.js"));
+			f->evaluateJavaScript(contentsOfQResource(":/js/webthree.js"));
+			f->evaluateJavaScript(contentsOfQResource(":/js/setup.js"));
+		});
 	});
 
 	connect(ui->webView, &QWebView::loadFinished, [=]()
@@ -216,7 +198,6 @@ Main::~Main()
 	writeSettings();
 	// Must do this here since otherwise m_ethereum'll be deleted (and therefore clearWatches() called by the destructor)
 	// *after* the client is dead.
-	m_qweb->clientDieing();
 	g_logPost = simpleDebugOut;
 }
 
@@ -372,12 +353,6 @@ void Main::on_forceMining_triggered()
 	ethereum()->setForceMining(ui->forceMining->isChecked());
 }
 
-void Main::on_enableOptimizer_triggered()
-{
-	m_enableOptimizer = ui->enableOptimizer->isChecked();
-	on_data_textChanged();
-}
-
 QString Main::contents(QString _s)
 {
 	return QString::fromStdString(dev::asString(dev::contents(_s.toStdString())));
@@ -411,6 +386,12 @@ void Main::load(QString _s)
 	}*/
 }
 
+void Main::on_newTransaction_triggered()
+{
+	m_transact.setEnvironment(m_myKeys, ethereum(), &m_natSpecDB);
+	m_transact.exec();
+}
+
 void Main::on_loadJS_triggered()
 {
 	QString f = QFileDialog::getOpenFileName(this, "Load Javascript", QString(), "Javascript (*.js);;All files (*)");
@@ -672,7 +653,6 @@ void Main::writeSettings()
 	s.setValue("paranoia", ui->paranoia->isChecked());
 	s.setValue("showAll", ui->showAll->isChecked());
 	s.setValue("showAllAccounts", ui->showAllAccounts->isChecked());
-	s.setValue("enableOptimizer", m_enableOptimizer);
 	s.setValue("clientName", ui->clientName->text());
 	s.setValue("idealPeers", ui->idealPeers->value());
 	s.setValue("port", ui->port->value());
@@ -742,8 +722,6 @@ void Main::readSettings(bool _skipGeometry)
 	ui->paranoia->setChecked(s.value("paranoia", false).toBool());
 	ui->showAll->setChecked(s.value("showAll", false).toBool());
 	ui->showAllAccounts->setChecked(s.value("showAllAccounts", false).toBool());
-	m_enableOptimizer = s.value("enableOptimizer", true).toBool();
-	ui->enableOptimizer->setChecked(m_enableOptimizer);
 	ui->clientName->setText(s.value("clientName", "").toString());
 	if (ui->clientName->text().isEmpty())
 		ui->clientName->setText(QInputDialog::getText(nullptr, "Enter identity", "Enter a name that will identify you on the peer network"));
@@ -990,7 +968,6 @@ void Main::refreshNetwork()
 
 void Main::refreshAll()
 {
-	refreshDestination();
 	refreshBlockChain();
 	refreshBlockCount();
 	refreshPending();
@@ -1041,20 +1018,6 @@ void Main::refreshAccounts()
 		}
 }
 
-void Main::refreshDestination()
-{
-	cwatch << "refreshDestination()";
-	QString s;
-	for (auto i: ethereum()->addresses())
-		if ((s = pretty(i)).size())
-			// A namereg address
-			if (ui->destination->findText(s, Qt::MatchExactly | Qt::MatchCaseSensitive) == -1)
-				ui->destination->addItem(s);
-	for (int i = 0; i < ui->destination->count(); ++i)
-		if (ui->destination->itemText(i) != "(Create Contract)" && !fromString(ui->destination->itemText(i)))
-			ui->destination->removeItem(i--);
-}
-
 void Main::refreshBlockCount()
 {
 	cwatch << "refreshBlockCount()";
@@ -1477,13 +1440,12 @@ void Main::on_debugCurrent_triggered()
 		if (!item->data(Qt::UserRole + 1).isNull())
 		{
 			unsigned txi = item->data(Qt::UserRole + 1).toInt();
-			m_executiveState = ethereum()->state(txi + 1, h);
-			m_currentExecution = unique_ptr<Executive>(new Executive(m_executiveState, ethereum()->blockChain(), 0));
-			Transaction t = m_executiveState.pending()[txi];
-			m_executiveState = m_executiveState.fromPending(txi);
-			auto r = t.rlp();
-			populateDebugger(&r);
-			m_currentExecution.reset();
+			bytes t = ethereum()->blockChain().transaction(h, txi);
+			State s(ethereum()->state(txi, h));
+			Executive e(s, ethereum()->blockChain(), 0);
+			Debugger dw(this, this);
+			dw.populate(e, Transaction(t, CheckSignature::Sender));
+			dw.exec();
 		}
 	}
 }
@@ -1514,49 +1476,6 @@ void Main::on_debugDumpStatePre_triggered()
 	on_debugDumpState_triggered(0);
 }
 
-void Main::populateDebugger(dev::bytesConstRef _r)
-{
-	bool done = m_currentExecution->setup(_r);
-	if (!done)
-	{
-		debugFinished();
-		vector<WorldState const*> levels;
-		m_codes.clear();
-		bytes lastExtCode;
-		bytesConstRef lastData;
-		h256 lastHash;
-		h256 lastDataHash;
-		auto onOp = [&](uint64_t steps, Instruction inst, dev::bigint newMemSize, dev::bigint gasCost, VM* voidVM, ExtVMFace const* voidExt)
-		{
-			VM& vm = *voidVM;
-			ExtVM const& ext = *static_cast<ExtVM const*>(voidExt);
-			if (ext.code != lastExtCode)
-			{
-				lastExtCode = ext.code;
-				lastHash = sha3(lastExtCode);
-				if (!m_codes.count(lastHash))
-					m_codes[lastHash] = ext.code;
-			}
-			if (ext.data != lastData)
-			{
-				lastData = ext.data;
-				lastDataHash = sha3(lastData);
-				if (!m_codes.count(lastDataHash))
-					m_codes[lastDataHash] = ext.data.toBytes();
-			}
-			if (levels.size() < ext.depth)
-				levels.push_back(&m_history.back());
-			else
-				levels.resize(ext.depth);
-			m_history.append(WorldState({steps, ext.myAddress, vm.curPC(), inst, newMemSize, vm.gas(), lastHash, lastDataHash, vm.stack(), vm.memory(), gasCost, ext.state().storage(ext.myAddress), levels}));
-		};
-		m_currentExecution->go(onOp);
-		m_currentExecution->finalize();
-		initDebugger();
-		updateDebugger();
-	}
-}
-
 void Main::on_contracts_currentItemChanged()
 {
 	ui->contractInfo->clear();
@@ -1572,7 +1491,7 @@ void Main::on_contracts_currentItemChanged()
 			auto storage = ethereum()->storageAt(address);
 			for (auto const& i: storage)
 				s << "@" << showbase << hex << prettyU256(i.first).toStdString() << "&nbsp;&nbsp;&nbsp;&nbsp;" << showbase << hex << prettyU256(i.second).toStdString() << "<br/>";
-			s << "<h4>Body Code</h4>" << disassemble(ethereum()->codeAt(address));
+			s << "<h4>Body Code (" << sha3(ethereum()->codeAt(address)).abridged() << ")</h4>" << disassemble(ethereum()->codeAt(address));
 			s << Div(Mono) << toHex(ethereum()->codeAt(address)) << "</div>";
 			ui->contractInfo->appendHtml(QString::fromStdString(s.str()));
 		}
@@ -1616,19 +1535,6 @@ void Main::on_contracts_doubleClicked()
 	qApp->clipboard()->setText(QString::fromStdString(toHex(h.asArray())));
 }
 
-void Main::on_destination_currentTextChanged()
-{
-	if (ui->destination->currentText().size() && ui->destination->currentText() != "(Create Contract)")
-		if (Address a = fromString(ui->destination->currentText()))
-			ui->calculatedName->setText(render(a));
-		else
-			ui->calculatedName->setText("Unknown Address");
-	else
-		ui->calculatedName->setText("Create Contract");
-	on_data_textChanged();
-//	updateFee();
-}
-
 static shh::FullTopic topicFromText(QString _s)
 {
 	shh::BuildTopic ret;
@@ -1683,134 +1589,6 @@ static shh::FullTopic topicFromText(QString _s)
 	return ret;
 }
 
-bool Main::sourceIsSolidity(string const& _source)
-{
-	// TODO: Improve this heuristic
-	return (_source.substr(0, 8) == "contract" || _source.substr(0, 5) == "//sol");
-}
-
-static bool sourceIsSerpent(string const& _source)
-{
-	// TODO: Improve this heuristic
-	return (_source.substr(0, 5) == "//ser");
-}
-
-string const Main::getFunctionHashes(dev::solidity::CompilerStack const &_compiler,
-									 string const& _contractName)
-{
-	string ret = "";
-	auto const& contract = _compiler.getContractDefinition(_contractName);
-	auto interfaceFunctions = contract.getInterfaceFunctions();
-
-	for (auto const& it: interfaceFunctions)
-	{
-		ret += it.first.abridged();
-		ret += " :";
-		ret += it.second->getDeclaration().getName() + "\n";
-	}
-	return ret;
-}
-
-void Main::on_data_textChanged()
-{
-	m_pcWarp.clear();
-	if (isCreation())
-	{
-		string src = ui->data->toPlainText().toStdString();
-		vector<string> errors;
-		QString lll;
-		QString solidity;
-		if (src.find_first_not_of("1234567890abcdefABCDEF") == string::npos && src.size() % 2 == 0)
-		{
-			m_data = fromHex(src);
-		}
-		else if (sourceIsSolidity(src))
-		{
-			dev::solidity::CompilerStack compiler;
-			try
-			{
-//				compiler.addSources(dev::solidity::StandardSources);
-				m_data = compiler.compile(src, m_enableOptimizer);
-				solidity = "<h4>Solidity</h4>";
-				solidity += "<pre>var " + QString::fromStdString(compiler.getContractNames().front()) + " = web3.eth.contractFromAbi(" + QString::fromStdString(compiler.getInterface()).replace(QRegExp("\\s"), "").toHtmlEscaped() + ");</pre>";
-				solidity += "<pre>" + QString::fromStdString(compiler.getSolidityInterface()).toHtmlEscaped() + "</pre>";
-				solidity += "<pre>" + QString::fromStdString(getFunctionHashes(compiler)).toHtmlEscaped() + "</pre>";
-			}
-			catch (dev::Exception const& exception)
-			{
-				ostringstream error;
-				solidity::SourceReferenceFormatter::printExceptionInformation(error, exception, "Error", compiler);
-				solidity = "<h4>Solidity</h4><pre>" + QString::fromStdString(error.str()).toHtmlEscaped() + "</pre>";
-			}
-			catch (...)
-			{
-				solidity = "<h4>Solidity</h4><pre>Uncaught exception.</pre>";
-			}
-		}
-#ifndef _MSC_VER
-		else if (sourceIsSerpent(src))
-		{
-			try
-			{
-				m_data = dev::asBytes(::compile(src));
-				for (auto& i: errors)
-					i = "(LLL " + i + ")";
-			}
-			catch (string err)
-			{
-				errors.push_back("Serpent " + err);
-			}
-		}
-#endif
-		else
-		{
-			m_data = compileLLL(src, m_enableOptimizer, &errors);
-			if (errors.empty())
-			{
-				auto asmcode = compileLLLToAsm(src, false);
-				lll = "<h4>Pre</h4><pre>" + QString::fromStdString(asmcode).toHtmlEscaped() + "</pre>";
-				if (m_enableOptimizer)
-				{
-					asmcode = compileLLLToAsm(src, true);
-					lll = "<h4>Opt</h4><pre>" + QString::fromStdString(asmcode).toHtmlEscaped() + "</pre>" + lll;
-				}
-			}
-		}
-		QString errs;
-		if (errors.size())
-		{
-			errs = "<h4>Errors</h4>";
-			for (auto const& i: errors)
-				errs.append("<div style=\"border-left: 6px solid #c00; margin-top: 2px\">" + QString::fromStdString(i).toHtmlEscaped() + "</div>");
-		}
-		ui->code->setHtml(errs + lll + solidity + "<h4>Code</h4>" + QString::fromStdString(disassemble(m_data)).toHtmlEscaped() + "<h4>Hex</h4>" Div(Mono) + QString::fromStdString(toHex(m_data)) + "</div>");
-		ui->gas->setMinimum((qint64)Client::txGas(m_data, 0));
-		if (!ui->gas->isEnabled())
-			ui->gas->setValue(m_backupGas);
-		ui->gas->setEnabled(true);
-	}
-	else
-	{
-		m_data = parseData(ui->data->toPlainText().toStdString());
-		ui->code->setHtml(QString::fromStdString(dev::memDump(m_data, 8, true)));
-		if (ethereum()->codeAt(fromString(ui->destination->currentText()), 0).size())
-		{
-			ui->gas->setMinimum((qint64)Client::txGas(m_data, 1));
-			if (!ui->gas->isEnabled())
-				ui->gas->setValue(m_backupGas);
-			ui->gas->setEnabled(true);
-		}
-		else
-		{
-			if (ui->gas->isEnabled())
-				m_backupGas = ui->gas->value();
-			ui->gas->setValue((qint64)Client::txGas(m_data));
-			ui->gas->setEnabled(false);
-		}
-	}
-	updateFee();
-}
-
 void Main::on_clearPending_triggered()
 {
 	writeSettings();
@@ -1835,54 +1613,6 @@ void Main::on_killBlockchain_triggered()
 	refreshAll();
 }
 
-bool Main::isCreation() const
-{
-	return ui->destination->currentText().isEmpty() || ui->destination->currentText() == "(Create Contract)";
-}
-
-u256 Main::fee() const
-{
-	return ui->gas->value() * gasPrice();
-}
-
-u256 Main::value() const
-{
-	if (ui->valueUnits->currentIndex() == -1)
-		return 0;
-	return ui->value->value() * units()[units().size() - 1 - ui->valueUnits->currentIndex()].first;
-}
-
-u256 Main::gasPrice() const
-{
-	if (ui->gasPriceUnits->currentIndex() == -1)
-		return 0;
-	return ui->gasPrice->value() * units()[units().size() - 1 - ui->gasPriceUnits->currentIndex()].first;
-}
-
-u256 Main::total() const
-{
-	return value() + fee();
-}
-
-void Main::updateFee()
-{
-	ui->fee->setText(QString("(gas sub-total: %1)").arg(formatBalance(fee()).c_str()));
-	auto totalReq = total();
-	ui->total->setText(QString("Total: %1").arg(formatBalance(totalReq).c_str()));
-
-	bool ok = false;
-	for (auto i: m_myKeys)
-		if (ethereum()->balanceAt(i.address()) >= totalReq)
-		{
-			ok = true;
-			break;
-		}
-	ui->send->setEnabled(ok);
-	QPalette p = ui->total->palette();
-	p.setColor(QPalette::WindowText, QColor(ok ? 0x00 : 0x80, 0x00, 0x00));
-	ui->total->setPalette(p);
-}
-
 void Main::on_net_triggered()
 {
 	ui->port->setEnabled(!ui->net->isChecked());
@@ -1944,79 +1674,12 @@ void Main::on_mine_triggered()
 		ethereum()->stopMining();
 }
 
-void Main::on_send_clicked()
-{
-	u256 totalReq = value() + fee();
-	for (auto i: m_myKeys)
-		if (ethereum()->balanceAt(i.address(), 0) >= totalReq)
-		{
-			debugFinished();
-			Secret s = i.secret();
-			if (isCreation())
-			{
-				// If execution is a contract creation, add Natspec to
-				// a local Natspec LEVELDB
-				ethereum()->transact(s, value(), m_data, ui->gas->value(), gasPrice());
-				string src = ui->data->toPlainText().toStdString();
-				if (sourceIsSolidity(src))
-					try
-					{
-						dev::solidity::CompilerStack compiler;
-						m_data = compiler.compile(src, m_enableOptimizer);
-						for (string& s: compiler.getContractNames())
-						{
-							h256 contractHash = compiler.getContractCodeHash(s);
-							m_natspecDB.add(contractHash,
-											compiler.getMetadata(s, dev::solidity::DocumentationType::NatspecUser));
-						}
-					}
-					catch (...)
-					{
-						statusBar()->showMessage("Couldn't compile Solidity Contract.");
-					}
-			}
-			else
-				ethereum()->transact(s, value(), fromString(ui->destination->currentText()), m_data, ui->gas->value(), gasPrice());
-			return;
-		}
-	statusBar()->showMessage("Couldn't make transaction: no single account contains at least the required amount.");
-}
-
 void Main::keysChanged()
 {
 	onBalancesChange();
 	m_server->setAccounts(keysAsVector(m_myKeys));
 }
 
-void Main::on_debug_clicked()
-{
-	debugFinished();
-	try
-	{
-		u256 totalReq = value() + fee();
-		for (auto i: m_myKeys)
-			if (ethereum()->balanceAt(i.address()) >= totalReq)
-			{
-				Secret s = i.secret();
-				m_executiveState = ethereum()->postState();
-				m_currentExecution = unique_ptr<Executive>(new Executive(m_executiveState, ethereum()->blockChain(), 0));
-				Transaction t = isCreation() ?
-					Transaction(value(), gasPrice(), ui->gas->value(), m_data, m_executiveState.transactionsFrom(dev::toAddress(s)), s) :
-					Transaction(value(), gasPrice(), ui->gas->value(), fromString(ui->destination->currentText()), m_data, m_executiveState.transactionsFrom(dev::toAddress(s)), s);
-				auto r = t.rlp();
-				populateDebugger(&r);
-				m_currentExecution.reset();
-				return;
-			}
-		statusBar()->showMessage("Couldn't make transaction: no single account contains at least the required amount.");
-	}
-	catch (dev::Exception const& _e)
-	{
-		statusBar()->showMessage("Error running transaction: " + QString::fromStdString(diagnostic_information(_e)));
-		// this output is aimed at developers, reconsider using _e.what for more user friendly output.
-	}
-}
-
 bool beginsWith(Address _a, bytes const& _b)
 {
 	for (unsigned i = 0; i < min<unsigned>(20, _b.size()); ++i)
@@ -2025,7 +1688,7 @@ bool beginsWith(Address _a, bytes const& _b)
 	return true;
 }
 
-void Main::on_create_triggered()
+void Main::on_newAccount_triggered()
 {
 	bool ok = true;
 	enum { NoVanity = 0, FirstTwo, FirstTwoNextTwo, FirstThree, FirstFour, StringMatch };
@@ -2093,111 +1756,6 @@ void Main::on_killAccount_triggered()
 	}
 }
 
-void Main::on_debugStep_triggered()
-{
-	if (ui->debugTimeline->value() < m_history.size()) {
-		auto l = m_history[ui->debugTimeline->value()].levels.size();
-		if ((ui->debugTimeline->value() + 1) < m_history.size() && m_history[ui->debugTimeline->value() + 1].levels.size() > l)
-		{
-			on_debugStepInto_triggered();
-			if (m_history[ui->debugTimeline->value()].levels.size() > l)
-				on_debugStepOut_triggered();
-		}
-		else
-			on_debugStepInto_triggered();
-	}
-}
-
-void Main::on_debugStepInto_triggered()
-{
-	ui->debugTimeline->setValue(ui->debugTimeline->value() + 1);
-	ui->callStack->setCurrentRow(0);
-}
-
-void Main::on_debugStepOut_triggered()
-{
-	if (ui->debugTimeline->value() < m_history.size())
-	{
-		auto ls = m_history[ui->debugTimeline->value()].levels.size();
-		auto l = ui->debugTimeline->value();
-		for (; l < m_history.size() && m_history[l].levels.size() >= ls; ++l) {}
-		ui->debugTimeline->setValue(l);
-		ui->callStack->setCurrentRow(0);
-	}
-}
-
-void Main::on_debugStepBackInto_triggered()
-{
-	ui->debugTimeline->setValue(ui->debugTimeline->value() - 1);
-	ui->callStack->setCurrentRow(0);
-}
-
-void Main::on_debugStepBack_triggered()
-{
-	auto l = m_history[ui->debugTimeline->value()].levels.size();
-	if (ui->debugTimeline->value() > 0 && m_history[ui->debugTimeline->value() - 1].levels.size() > l)
-	{
-		on_debugStepBackInto_triggered();
-		if (m_history[ui->debugTimeline->value()].levels.size() > l)
-			on_debugStepBackOut_triggered();
-	}
-	else
-		on_debugStepBackInto_triggered();
-}
-
-void Main::on_debugStepBackOut_triggered()
-{
-	if (ui->debugTimeline->value() > 0 && m_history.size() > 0)
-	{
-		auto ls = m_history[min(ui->debugTimeline->value(), m_history.size() - 1)].levels.size();
-		int l = ui->debugTimeline->value();
-		for (; l > 0 && m_history[l].levels.size() >= ls; --l) {}
-		ui->debugTimeline->setValue(l);
-		ui->callStack->setCurrentRow(0);
-	}
-}
-
-void Main::on_dumpTrace_triggered()
-{
-	QString fn = QFileDialog::getSaveFileName(this, "Select file to output EVM trace");
-	ofstream f(fn.toStdString());
-	if (f.is_open())
-		for (WorldState const& ws: m_history)
-			f << ws.cur << " " << hex << toHex(dev::toCompactBigEndian(ws.curPC, 1)) << " " << hex << toHex(dev::toCompactBigEndian((int)(byte)ws.inst, 1)) << " " << hex << toHex(dev::toCompactBigEndian((uint64_t)ws.gas, 1)) << endl;
-}
-
-void Main::on_dumpTracePretty_triggered()
-{
-	QString fn = QFileDialog::getSaveFileName(this, "Select file to output EVM trace");
-	ofstream f(fn.toStdString());
-	if (f.is_open())
-		for (WorldState const& ws: m_history)
-		{
-			f << endl << "    STACK" << endl;
-			for (auto i: ws.stack)
-				f << (h256)i << endl;
-			f << "    MEMORY" << endl << dev::memDump(ws.memory);
-			f << "    STORAGE" << endl;
-			for (auto const& i: ws.storage)
-				f << showbase << hex << i.first << ": " << i.second << endl;
-			f << dec << ws.levels.size() << " | " << ws.cur << " | #" << ws.steps << " | " << hex << setw(4) << setfill('0') << ws.curPC << " : " << instructionInfo(ws.inst).name << " | " << dec << ws.gas << " | -" << dec << ws.gasCost << " | " << ws.newMemSize << "x32";
-		}
-}
-
-void Main::on_dumpTraceStorage_triggered()
-{
-	QString fn = QFileDialog::getSaveFileName(this, "Select file to output EVM trace");
-	ofstream f(fn.toStdString());
-	if (f.is_open())
-		for (WorldState const& ws: m_history)
-		{
-			if (ws.inst == Instruction::STOP || ws.inst == Instruction::RETURN || ws.inst == Instruction::SUICIDE)
-				for (auto i: ws.storage)
-					f << toHex(dev::toCompactBigEndian(i.first, 1)) << " " << toHex(dev::toCompactBigEndian(i.second, 1)) << endl;
-			f << ws.cur << " " << hex << toHex(dev::toCompactBigEndian(ws.curPC, 1)) << " " << hex << toHex(dev::toCompactBigEndian((int)(byte)ws.inst, 1)) << " " << hex << toHex(dev::toCompactBigEndian((uint64_t)ws.gas, 1)) << endl;
-		}
-}
-
 void Main::on_go_triggered()
 {
 	if (!ui->net->isChecked())
@@ -2208,60 +1766,6 @@ void Main::on_go_triggered()
 	web3()->connect(Host::pocHost());
 }
 
-void Main::on_callStack_currentItemChanged()
-{
-	updateDebugger();
-}
-
-void Main::alterDebugStateGroup(bool _enable) const
-{
-	ui->debugStep->setEnabled(_enable);
-	ui->debugStepInto->setEnabled(_enable);
-	ui->debugStepOut->setEnabled(_enable);
-	ui->debugStepBackInto->setEnabled(_enable);
-	ui->debugStepBackOut->setEnabled(_enable);
-	ui->dumpTrace->setEnabled(_enable);
-	ui->dumpTraceStorage->setEnabled(_enable);
-	ui->dumpTracePretty->setEnabled(_enable);
-	ui->debugStepBack->setEnabled(_enable);
-	ui->debugPanel->setEnabled(_enable);
-}
-
-void Main::debugFinished()
-{
-	m_codes.clear();
-	m_pcWarp.clear();
-	m_history.clear();
-	m_lastLevels.clear();
-	m_lastCode = h256();
-	ui->callStack->clear();
-	ui->debugCode->clear();
-	ui->debugStack->clear();
-	ui->debugMemory->setHtml("");
-	ui->debugStorage->setHtml("");
-	ui->debugStateInfo->setText("");
-	alterDebugStateGroup(false);
-//	ui->send->setEnabled(true);
-}
-
-void Main::initDebugger()
-{
-//	ui->send->setEnabled(false);
-	if (m_history.size())
-	{
-		alterDebugStateGroup(true);
-		ui->debugCode->setEnabled(false);
-		ui->debugTimeline->setMinimum(0);
-		ui->debugTimeline->setMaximum(m_history.size());
-		ui->debugTimeline->setValue(0);
-	}
-}
-
-void Main::on_debugTimeline_valueChanged()
-{
-	updateDebugger();
-}
-
 QString Main::prettyU256(dev::u256 _n) const
 {
 	unsigned inc = 0;
@@ -2289,136 +1793,6 @@ QString Main::prettyU256(dev::u256 _n) const
 	return QString::fromStdString(s.str());
 }
 
-void Main::updateDebugger()
-{
-	if (m_history.size())
-	{
-		WorldState const& nws = m_history[min((int)m_history.size() - 1, ui->debugTimeline->value())];
-		WorldState const& ws = ui->callStack->currentRow() > 0 ? *nws.levels[nws.levels.size() - ui->callStack->currentRow()] : nws;
-
-		if (ui->debugTimeline->value() >= m_history.size())
-		{
-			if (ws.gasCost > ws.gas)
-				ui->debugMemory->setHtml("<h3>OUT-OF-GAS</h3>");
-			else if (ws.inst == Instruction::RETURN && ws.stack.size() >= 2)
-			{
-				unsigned from = (unsigned)ws.stack.back();
-				unsigned size = (unsigned)ws.stack[ws.stack.size() - 2];
-				unsigned o = 0;
-				bytes out(size, 0);
-				for (; o < size && from + o < ws.memory.size(); ++o)
-					out[o] = ws.memory[from + o];
-				ui->debugMemory->setHtml("<h3>RETURN</h3>" + QString::fromStdString(dev::memDump(out, 16, true)));
-			}
-			else if (ws.inst == Instruction::STOP)
-				ui->debugMemory->setHtml("<h3>STOP</h3>");
-			else if (ws.inst == Instruction::SUICIDE && ws.stack.size() >= 1)
-				ui->debugMemory->setHtml("<h3>SUICIDE</h3>0x" + QString::fromStdString(toString(right160(ws.stack.back()))));
-			else
-				ui->debugMemory->setHtml("<h3>EXCEPTION</h3>");
-
-			ostringstream ss;
-			ss << dec << "EXIT  |  GAS: " << dec << max<dev::bigint>(0, (dev::bigint)ws.gas - ws.gasCost);
-			ui->debugStateInfo->setText(QString::fromStdString(ss.str()));
-			ui->debugStorage->setHtml("");
-			ui->debugCallData->setHtml("");
-			m_lastData = h256();
-			ui->callStack->clear();
-			m_lastLevels.clear();
-			ui->debugCode->clear();
-			m_lastCode = h256();
-			ui->debugStack->setHtml("");
-		}
-		else
-		{
-			if (m_lastLevels != nws.levels || !ui->callStack->count())
-			{
-				m_lastLevels = nws.levels;
-				ui->callStack->clear();
-				for (unsigned i = 0; i <= nws.levels.size(); ++i)
-				{
-					WorldState const& s = i ? *nws.levels[nws.levels.size() - i] : nws;
-					ostringstream out;
-					out << s.cur.abridged();
-					if (i)
-						out << " " << instructionInfo(s.inst).name << " @0x" << hex << s.curPC;
-					ui->callStack->addItem(QString::fromStdString(out.str()));
-				}
-			}
-
-			if (ws.code != m_lastCode)
-			{
-				bytes const& code = m_codes[ws.code];
-				QListWidget* dc = ui->debugCode;
-				dc->clear();
-				m_pcWarp.clear();
-				for (unsigned i = 0; i <= code.size(); ++i)
-				{
-					byte b = i < code.size() ? code[i] : 0;
-					try
-					{
-						QString s = QString::fromStdString(instructionInfo((Instruction)b).name);
-						ostringstream out;
-						out << hex << setw(4) << setfill('0') << i;
-						m_pcWarp[i] = dc->count();
-						if (b >= (byte)Instruction::PUSH1 && b <= (byte)Instruction::PUSH32)
-						{
-							unsigned bc = b - (byte)Instruction::PUSH1 + 1;
-							s = "PUSH 0x" + QString::fromStdString(toHex(bytesConstRef(&code[i + 1], bc)));
-							i += bc;
-						}
-						dc->addItem(QString::fromStdString(out.str()) + "  "  + s);
-					}
-					catch (...)
-					{
-						cerr << "Unhandled exception!" << endl <<
-									boost::current_exception_diagnostic_information();
-						break;	// probably hit data segment
-					}
-				}
-				m_lastCode = ws.code;
-			}
-
-			if (ws.callData != m_lastData)
-			{
-				m_lastData = ws.callData;
-				if (ws.callData)
-				{
-					assert(m_codes.count(ws.callData));
-					ui->debugCallData->setHtml(QString::fromStdString(dev::memDump(m_codes[ws.callData], 16, true)));
-				}
-				else
-					ui->debugCallData->setHtml("");
-			}
-
-			QString stack;
-			for (auto i: ws.stack)
-				stack.prepend("<div>" + prettyU256(i) + "</div>");
-			ui->debugStack->setHtml(stack);
-			ui->debugMemory->setHtml(QString::fromStdString(dev::memDump(ws.memory, 16, true)));
-			assert(m_codes.count(ws.code));
-
-			if (m_codes[ws.code].size() >= (unsigned)ws.curPC)
-			{
-				int l = m_pcWarp[(unsigned)ws.curPC];
-				ui->debugCode->setCurrentRow(max(0, l - 5));
-				ui->debugCode->setCurrentRow(min(ui->debugCode->count() - 1, l + 5));
-				ui->debugCode->setCurrentRow(l);
-			}
-			else
-				cwarn << "PC (" << (unsigned)ws.curPC << ") is after code range (" << m_codes[ws.code].size() << ")";
-
-			ostringstream ss;
-			ss << dec << "STEP: " << ws.steps << "  |  PC: 0x" << hex << ws.curPC << "  :  " << instructionInfo(ws.inst).name << "  |  ADDMEM: " << dec << ws.newMemSize << " words  |  COST: " << dec << ws.gasCost <<  "  |  GAS: " << dec << ws.gas;
-			ui->debugStateInfo->setText(QString::fromStdString(ss.str()));
-			stringstream s;
-			for (auto const& i: ws.storage)
-				s << "@" << prettyU256(i.first).toStdString() << "&nbsp;&nbsp;&nbsp;&nbsp;" << prettyU256(i.second).toStdString() << "<br/>";
-			ui->debugStorage->setHtml(QString::fromStdString(s.str()));
-		}
-	}
-}
-
 void Main::on_post_clicked()
 {
 	shh::Message m;
@@ -2431,14 +1805,16 @@ void Main::on_post_clicked()
 	whisper()->inject(m.seal(from, topicFromText(ui->shhTopic->toPlainText()), ui->shhTtl->value(), ui->shhWork->value()));
 }
 
-string Main::lookupNatSpec(dev::h256 const& _contractHash) const
-{
-	return m_natspecDB.retrieve(_contractHash);
-}
-
-string Main::lookupNatSpecUserNotice(dev::h256 const& _contractHash, dev::bytes const& _transactionData)
+int Main::authenticate(QString _title, QString _text)
 {
-	return m_natspecDB.getUserNotice(_contractHash, _transactionData);
+	QMessageBox userInput(this);
+	userInput.setText(_title);
+	userInput.setInformativeText(_text);
+	userInput.setStandardButtons(QMessageBox::Ok | QMessageBox::Cancel);
+	userInput.button(QMessageBox::Ok)->setText("Allow");
+	userInput.button(QMessageBox::Cancel)->setText("Reject");
+	userInput.setDefaultButton(QMessageBox::Cancel);
+	return userInput.exec();
 }
 
 void Main::refreshWhispers()
diff --git a/alethzero/MainWin.h b/alethzero/MainWin.h
index 2625f566d..6c4a97301 100644
--- a/alethzero/MainWin.h
+++ b/alethzero/MainWin.h
@@ -34,10 +34,10 @@
 #include <libethcore/CommonEth.h>
 #include <libethereum/State.h>
 #include <libethereum/Executive.h>
-#include <libqwebthree/QWebThree.h>
 #include <libwebthree/WebThree.h>
 #include <libsolidity/CompilerStack.h>
-
+#include "Context.h"
+#include "Transact.h"
 #include "NatspecHandler.h"
 
 namespace Ui {
@@ -49,31 +49,18 @@ class Client;
 class State;
 }}
 
+namespace jsonrpc {
+class HttpServer;
+}
+
 class QQuickView;
 class OurWebThreeStubServer;
 
-struct WorldState
-{
-	uint64_t steps;
-	dev::Address cur;
-	dev::u256 curPC;
-	dev::eth::Instruction inst;
-	dev::bigint newMemSize;
-	dev::u256 gas;
-	dev::h256 code;
-	dev::h256 callData;
-	dev::u256s stack;
-	dev::bytes memory;
-	dev::bigint gasCost;
-	std::map<dev::u256, dev::u256> storage;
-	std::vector<WorldState const*> levels;
-};
-
 using WatchHandler = std::function<void(dev::eth::LocalisedLogEntries const&)>;
 
 QString contentsOfQResource(std::string const& res);
 
-class Main : public QMainWindow
+class Main: public QMainWindow, public Context
 {
 	Q_OBJECT
 
@@ -85,13 +72,20 @@ public:
 	dev::eth::Client* ethereum() const { return m_webThree->ethereum(); }
 	std::shared_ptr<dev::shh::WhisperHost> whisper() const { return m_webThree->whisper(); }
 
-	std::string lookupNatSpec(dev::h256 const& _contractHash) const;
-	std::string lookupNatSpecUserNotice(dev::h256 const& _contractHash, dev::bytes const& _transactionData);
+	NatSpecFace* natSpec() { return &m_natSpecDB; }
 
-	QList<dev::KeyPair> owned() const { return m_myIdentities + m_myKeys; }
-	
 	QVariant evalRaw(QString const& _js);
 
+	QString pretty(dev::Address _a) const override;
+	QString prettyU256(dev::u256 _n) const override;
+	QString render(dev::Address _a) const override;
+	dev::Address fromString(QString const& _a) const override;
+	std::string renderDiff(dev::eth::StateDiff const& _d) const override;
+
+	QList<dev::KeyPair> owned() const { return m_myIdentities + m_myKeys; }
+
+	dev::u256 gasPrice() const { return 10 * dev::eth::szabo; }
+
 public slots:
 	void load(QString _file);
 	void note(QString _entry);
@@ -99,75 +93,80 @@ public slots:
 	void warn(QString _entry);
 	QString contents(QString _file);
 
+	int authenticate(QString _title, QString _text);
+
 	void onKeysChanged();
 
 private slots:
 	void eval(QString const& _js);
 
+	// Application
+	void on_about_triggered();
+	void on_quit_triggered() { close(); }
+
+	// Network
+	void on_go_triggered();
+	void on_net_triggered();
 	void on_connect_triggered();
+	void on_idealPeers_valueChanged();
+
+	// Mining
 	void on_mine_triggered();
-	void on_send_clicked();
-	void on_create_triggered();
+
+	// View
+	void on_refresh_triggered();
+	void on_showAll_triggered() { refreshBlockChain(); }
+	void on_showAllAccounts_triggered() { refreshAccounts(); }
+	void on_preview_triggered();
+
+	// Account management
+	void on_newAccount_triggered();
 	void on_killAccount_triggered();
-	void on_net_triggered();
-	void on_verbosity_valueChanged();
-	void on_ourAccounts_doubleClicked();
+	void on_importKey_triggered();
+	void on_importKeyFile_triggered();
+	void on_exportKey_triggered();
+
+	// Tools
+	void on_newTransaction_triggered();
+	void on_loadJS_triggered();
+
+	// Stuff concerning the blocks/transactions/accounts panels
 	void ourAccountsRowsMoved();
+	void on_ourAccounts_doubleClicked();
 	void on_accounts_doubleClicked();
-	void on_destination_currentTextChanged();
-	void on_data_textChanged();
-	void on_idealPeers_valueChanged();
-	void on_value_valueChanged() { updateFee(); }
-	void on_gas_valueChanged() { updateFee(); }
-	void on_valueUnits_currentIndexChanged() { updateFee(); }
-	void on_gasPriceUnits_currentIndexChanged() { updateFee(); }
-	void on_gasPrice_valueChanged() { updateFee(); }
-	void on_log_doubleClicked();
-	void on_blocks_currentItemChanged();
 	void on_contracts_doubleClicked();
 	void on_contracts_currentItemChanged();
 	void on_transactionQueue_currentItemChanged();
-	void on_about_triggered();
-	void on_paranoia_triggered();
-	void on_nameReg_textChanged();
-	void on_preview_triggered();
-	void on_quit_triggered() { close(); }
+	void on_blockChainFilter_textChanged();
+	void on_blocks_currentItemChanged();
+
+	// Logging
+	void on_log_doubleClicked();
+	void on_verbosity_valueChanged();
+
+	// Misc
 	void on_urlEdit_returnPressed();
-	void on_debugStep_triggered();
-	void on_debugStepBack_triggered();
-	void on_debug_clicked();
-	void on_debugTimeline_valueChanged();
 	void on_jsInput_returnPressed();
+	void on_nameReg_textChanged();
+
+	// Special (debug) stuff
+	void on_paranoia_triggered();
 	void on_killBlockchain_triggered();
 	void on_clearPending_triggered();
-	void on_importKey_triggered();
-	void on_exportKey_triggered();
 	void on_inject_triggered();
-	void on_showAll_triggered() { refreshBlockChain(); }
-	void on_showAllAccounts_triggered() { refreshAccounts(); }
-	void on_loadJS_triggered();
-	void on_blockChainFilter_textChanged();
 	void on_forceMining_triggered();
-	void on_dumpTrace_triggered();
-	void on_dumpTraceStorage_triggered();
-	void on_dumpTracePretty_triggered();
-	void on_debugStepInto_triggered();
-	void on_debugStepOut_triggered();
-	void on_debugStepBackOut_triggered();
-	void on_debugStepBackInto_triggered();
-	void on_callStack_currentItemChanged();
+	void on_usePrivate_triggered();
+	void on_turboMining_triggered();
+	void on_jitvm_triggered();
+
+	// Debugger
 	void on_debugCurrent_triggered();
 	void on_debugDumpState_triggered(int _add = 1);
 	void on_debugDumpStatePre_triggered();
-	void on_refresh_triggered();
-	void on_usePrivate_triggered();
-	void on_enableOptimizer_triggered();
-	void on_turboMining_triggered();
-	void on_go_triggered();
-	void on_importKeyFile_triggered();
-	void on_post_clicked();
+
+	// Whisper
 	void on_newIdentity_triggered();
-	void on_jitvm_triggered();
+	void on_post_clicked();
 
 	void refreshWhisper();
 	void refreshBlockChain();
@@ -179,33 +178,14 @@ signals:
 private:
 	dev::p2p::NetworkPreferences netPrefs() const;
 
-	QString pretty(dev::Address _a) const;
-	QString prettyU256(dev::u256 _n) const;
-
 	QString lookup(QString const& _n) const;
 	dev::Address getNameReg() const;
 	dev::Address getCurrencies() const;
 
-	void populateDebugger(dev::bytesConstRef r);
-	void initDebugger();
-	void updateDebugger();
-	void debugFinished();
-	QString render(dev::Address _a) const;
-	dev::Address fromString(QString const& _a) const;
-	std::string renderDiff(dev::eth::StateDiff const& _d) const;
-
-	void alterDebugStateGroup(bool _enable) const;
-
 	void updateFee();
 	void readSettings(bool _skipGeometry = false);
 	void writeSettings();
 
-	bool isCreation() const;
-	dev::u256 fee() const;
-	dev::u256 total() const;
-	dev::u256 value() const;
-	dev::u256 gasPrice() const;
-
 	unsigned installWatch(dev::eth::LogFilter const& _tf, WatchHandler const& _f);
 	unsigned installWatch(dev::h256 _tf, WatchHandler const& _f);
 	void uninstallWatch(unsigned _w);
@@ -232,15 +212,9 @@ private:
 	void refreshAll();
 	void refreshPending();
 	void refreshAccounts();
-	void refreshDestination();
 	void refreshBlockCount();
 	void refreshBalances();
 
-	/// Attempts to infer that @c _source contains Solidity code
-	bool sourceIsSolidity(std::string const& _source);
-	/// @eturns all method hashes of a Solidity contract in a string
-	std::string const getFunctionHashes(dev::solidity::CompilerStack const &_compiler, std::string const& _contractName = "");
-
 	std::unique_ptr<Ui::Main> ui;
 
 	std::unique_ptr<dev::WebThreeDirect> m_webThree;
@@ -255,22 +229,8 @@ private:
 	QList<dev::KeyPair> m_myKeys;
 	QList<dev::KeyPair> m_myIdentities;
 	QString m_privateChain;
-	dev::bytes m_data;
 	dev::Address m_nameReg;
 
-	unsigned m_backupGas;
-
-	dev::eth::State m_executiveState;
-	std::unique_ptr<dev::eth::Executive> m_currentExecution;
-	dev::h256 m_lastCode;
-	dev::h256 m_lastData;
-	std::vector<WorldState const*> m_lastLevels;
-
-	QMap<unsigned, unsigned> m_pcWarp;
-	QList<WorldState> m_history;
-	std::map<dev::u256, dev::bytes> m_codes;	// and pcWarps
-	bool m_enableOptimizer = true;
-
 	QNetworkAccessManager m_webCtrl;
 
 	QList<QPair<QString, QString>> m_consoleHistory;
@@ -278,10 +238,11 @@ private:
 	QString m_logHistory;
 	bool m_logChanged = true;
 
-	std::unique_ptr<QWebThreeConnector> m_qwebConnector;
+	std::unique_ptr<jsonrpc::HttpServer> m_httpConnector;
 	std::unique_ptr<OurWebThreeStubServer> m_server;
-	QWebThree* m_qweb = nullptr;
 
 	static QString fromRaw(dev::h256 _n, unsigned* _inc = nullptr);
-	NatspecHandler m_natspecDB;
+	NatspecHandler m_natSpecDB;
+
+	Transact m_transact;
 };
diff --git a/alethzero/NatspecHandler.cpp b/alethzero/NatspecHandler.cpp
index 25cc13d4a..bfdbaa178 100644
--- a/alethzero/NatspecHandler.cpp
+++ b/alethzero/NatspecHandler.cpp
@@ -50,16 +50,15 @@ NatspecHandler::~NatspecHandler()
 
 void NatspecHandler::add(dev::h256 const& _contractHash, string const& _doc)
 {
-	bytes k = _contractHash.asBytes();
-	string v = _doc;
-	m_db->Put(m_writeOptions, ldb::Slice((char const*)k.data(), k.size()), ldb::Slice((char const*)v.data(), v.size()));
+	m_db->Put(m_writeOptions, _contractHash.ref(), _doc);
+	cdebug << "Registering NatSpec: " << _contractHash.abridged() << _doc;
 }
 
 string NatspecHandler::retrieve(dev::h256 const& _contractHash) const
 {
-	bytes k = _contractHash.asBytes();
 	string ret;
-	m_db->Get(m_readOptions, ldb::Slice((char const*)k.data(), k.size()), &ret);
+	m_db->Get(m_readOptions, _contractHash.ref(), &ret);
+	cdebug << "Looking up NatSpec: " << _contractHash.abridged() << ret;
 	return ret;
 }
 
@@ -69,8 +68,8 @@ string NatspecHandler::getUserNotice(string const& json, dev::bytes const& _tran
 	Json::Value userNotice;
 	string retStr;
 	m_reader.parse(json, natspec);
-	bytes transactionFunctionPart(_transactionData.begin(), _transactionData.begin() + 4);
-	FixedHash<4> transactionFunctionHash(transactionFunctionPart);
+
+	FixedHash<4> transactionFunctionHash((bytesConstRef(&_transactionData).cropped(0, 4).toBytes()));
 
 	Json::Value methods = natspec["methods"];
 	for (Json::ValueIterator it = methods.begin(); it != methods.end(); ++it)
diff --git a/alethzero/NatspecHandler.h b/alethzero/NatspecHandler.h
index 98677dbc2..15ceb7b0b 100644
--- a/alethzero/NatspecHandler.h
+++ b/alethzero/NatspecHandler.h
@@ -28,10 +28,11 @@
 #pragma warning(pop)
 #include <json/json.h>
 #include <libdevcore/FixedHash.h>
+#include "Context.h"
 
 namespace ldb = leveldb;
 
-class NatspecHandler
+class NatspecHandler: public NatSpecFace
 {
   public:
 	NatspecHandler();
@@ -40,7 +41,7 @@ class NatspecHandler
 	/// Stores locally in a levelDB a key value pair of contract code hash to natspec documentation
 	void add(dev::h256 const& _contractHash, std::string const& _doc);
 	/// Retrieves the natspec documentation as a string given a contract code hash
-	std::string retrieve(dev::h256 const& _contractHash) const;
+	std::string retrieve(dev::h256 const& _contractHash) const override;
 
 	/// Given a json natspec string and the transaction data return the user notice
 	std::string getUserNotice(std::string const& json, const dev::bytes& _transactionData);
diff --git a/alethzero/OurWebThreeStubServer.cpp b/alethzero/OurWebThreeStubServer.cpp
index 02d7236df..2d1dd0481 100644
--- a/alethzero/OurWebThreeStubServer.cpp
+++ b/alethzero/OurWebThreeStubServer.cpp
@@ -46,48 +46,71 @@ string OurWebThreeStubServer::shh_newIdentity()
 
 bool OurWebThreeStubServer::showAuthenticationPopup(string const& _title, string const& _text) const
 {
-	QMessageBox userInput;
-	userInput.setText(QString::fromStdString(_title));
-	userInput.setInformativeText(QString::fromStdString(_text + "\n Do you wish to allow this?"));
-	userInput.setStandardButtons(QMessageBox::Ok | QMessageBox::Cancel);
-	userInput.button(QMessageBox::Ok)->setText("Allow");
-	userInput.button(QMessageBox::Cancel)->setText("Reject");
-	userInput.setDefaultButton(QMessageBox::Cancel);
-	return userInput.exec() == QMessageBox::Ok;
+	int button;
+	QMetaObject::invokeMethod(m_main, "authenticate", Qt::BlockingQueuedConnection, Q_RETURN_ARG(int, button), Q_ARG(QString, QString::fromStdString(_title)), Q_ARG(QString, QString::fromStdString(_text)));
+	return button == QMessageBox::Ok;
 }
 
-void OurWebThreeStubServer::showBasicValueTransferNotice(u256 _value) const
+bool OurWebThreeStubServer::showCreationNotice(TransactionSkeleton const& _t) const
 {
-	QMessageBox notice;
-	notice.setText("Basic Value Transfer Transaction");
-	notice.setInformativeText(QString::fromStdString("Value is " + toString(_value)));
-	notice.setStandardButtons(QMessageBox::Ok);
-	notice.exec();
+	return showAuthenticationPopup("Contract Creation Transaction", "ÐApp is attemping to create a contract; to be endowed with " + formatBalance(_t.value) + ", with additional network fees of up to " + formatBalance(_t.gas * _t.gasPrice) + ".\n\nMaximum total cost is <b>" + formatBalance(_t.value + _t.gas * _t.gasPrice) + "</b>.");
+}
+
+bool OurWebThreeStubServer::showSendNotice(TransactionSkeleton const& _t) const
+{
+	return showAuthenticationPopup("Fund Transfer Transaction", "ÐApp is attempting to send " + formatBalance(_t.value) + " to a recipient " + m_main->pretty(_t.to).toStdString() + ", with additional network fees of up to " + formatBalance(_t.gas * _t.gasPrice) + ".\n\nMaximum total cost is <b>" + formatBalance(_t.value + _t.gas * _t.gasPrice) + "</b>.");
+}
+
+bool OurWebThreeStubServer::showUnknownCallNotice(TransactionSkeleton const& _t) const
+{
+	return showAuthenticationPopup("DANGEROUS! Unknown Contract Transaction!",
+		"ÐApp is attempting to call into an unknown contract at address " +
+		m_main->pretty(_t.to).toStdString() +
+		".\n\nCall involves sending " +
+		formatBalance(_t.value) + " to the recipient, with additional network fees of up to " +
+		formatBalance(_t.gas * _t.gasPrice) +
+		"However, this also does other stuff which we don't understand, and does so in your name.\n\n" +
+		"WARNING: This is probably going to cost you at least " +
+		formatBalance(_t.value + _t.gas * _t.gasPrice) +
+		", however this doesn't include any side-effects, which could be of far greater importance.\n\n" +
+		"REJECT UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!");
 }
 
 bool OurWebThreeStubServer::authenticate(TransactionSkeleton const& _t)
 {
+	if (_t.creation)
+	{
+		// recipient has no code - nothing special about this transaction, show basic value transfer info
+		return showCreationNotice(_t);
+	}
+
 	h256 contractCodeHash = m_web3->ethereum()->postState().codeHash(_t.to);
 	if (contractCodeHash == EmptySHA3)
-		// contract creation
-		return true;
-
-	if (false) //TODO: When is is just a value transfer?
 	{
 		// recipient has no code - nothing special about this transaction, show basic value transfer info
-		showBasicValueTransferNotice(_t.value);
-		return true;
+		return showSendNotice(_t);
 	}
 
-	string userNotice = m_main->lookupNatSpecUserNotice(contractCodeHash, _t.data);
+	string userNotice = m_main->natSpec()->getUserNotice(contractCodeHash, _t.data);
 
 	if (userNotice.empty())
-		return showAuthenticationPopup("Unverified Pending Transaction",
-									   "An undocumented transaction is about to be executed.");
+		return showUnknownCallNotice(_t);
 
 	NatspecExpressionEvaluator evaluator;
 	userNotice = evaluator.evalExpression(QString::fromStdString(userNotice)).toStdString();
 
 	// otherwise it's a transaction to a contract for which we have the natspec
-	return showAuthenticationPopup("Pending Transaction", userNotice);
+	return showAuthenticationPopup("Contract Transaction",
+		"ÐApp attempting to conduct contract interaction with " +
+		m_main->pretty(_t.to).toStdString() +
+		": <b>" + userNotice + "</b>.\n\n" +
+		(_t.value > 0 ?
+			"In addition, ÐApp is attempting to send " +
+			formatBalance(_t.value) + " to said recipient, with additional network fees of up to " +
+			formatBalance(_t.gas * _t.gasPrice) + " = <b>" +
+			formatBalance(_t.value + _t.gas * _t.gasPrice) + "</b>."
+		:
+			"Additional network fees are at most" +
+			formatBalance(_t.gas * _t.gasPrice) + ".")
+		);
 }
diff --git a/alethzero/OurWebThreeStubServer.h b/alethzero/OurWebThreeStubServer.h
index 303b73111..fbdae7d03 100644
--- a/alethzero/OurWebThreeStubServer.h
+++ b/alethzero/OurWebThreeStubServer.h
@@ -42,7 +42,9 @@ signals:
 
 private:
 	bool showAuthenticationPopup(std::string const& _title, std::string const& _text) const;
-	void showBasicValueTransferNotice(dev::u256 _value) const;
+	bool showCreationNotice(dev::eth::TransactionSkeleton const& _t) const;
+	bool showSendNotice(dev::eth::TransactionSkeleton const& _t) const;
+	bool showUnknownCallNotice(dev::eth::TransactionSkeleton const& _t) const;
 
 	dev::WebThreeDirect* m_web3;
 	Main* m_main;
diff --git a/alethzero/Transact.cpp b/alethzero/Transact.cpp
new file mode 100644
index 000000000..3031232c2
--- /dev/null
+++ b/alethzero/Transact.cpp
@@ -0,0 +1,336 @@
+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	cpp-ethereum is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file Transact.cpp
+ * @author Gav Wood <i@gavwood.com>
+ * @date 2015
+ */
+
+#include "Transact.h"
+
+#include <fstream>
+#include <QFileDialog>
+#include <QMessageBox>
+#include <liblll/Compiler.h>
+#include <liblll/CodeFragment.h>
+#include <libsolidity/CompilerStack.h>
+#include <libsolidity/Scanner.h>
+#include <libsolidity/AST.h>
+#include <libsolidity/SourceReferenceFormatter.h>
+#include <libnatspec/NatspecExpressionEvaluator.h>
+#include <libethereum/Client.h>
+#include <libethereum/Utility.h>
+#ifndef _MSC_VER
+#include <libserpent/funcs.h>
+#include <libserpent/util.h>
+#endif
+#include "Debugger.h"
+#include "ui_Transact.h"
+using namespace std;
+using namespace dev;
+using namespace dev::eth;
+
+Transact::Transact(Context* _c, QWidget* _parent):
+	QDialog(_parent),
+	ui(new Ui::Transact),
+	m_context(_c)
+{
+	ui->setupUi(this);
+
+	initUnits(ui->gasPriceUnits);
+	initUnits(ui->valueUnits);
+	ui->valueUnits->setCurrentIndex(6);
+	ui->gasPriceUnits->setCurrentIndex(4);
+	ui->gasPrice->setValue(10);
+	on_destination_currentTextChanged();
+}
+
+Transact::~Transact()
+{
+	delete ui;
+}
+
+void Transact::setEnvironment(QList<dev::KeyPair> _myKeys, dev::eth::Client* _eth, NatSpecFace* _natSpecDB)
+{
+	m_myKeys = _myKeys;
+	m_ethereum = _eth;
+	m_natSpecDB = _natSpecDB;
+}
+
+bool Transact::isCreation() const
+{
+	return ui->destination->currentText().isEmpty() || ui->destination->currentText() == "(Create Contract)";
+}
+
+u256 Transact::fee() const
+{
+	return ui->gas->value() * gasPrice();
+}
+
+u256 Transact::value() const
+{
+	if (ui->valueUnits->currentIndex() == -1)
+		return 0;
+	return ui->value->value() * units()[units().size() - 1 - ui->valueUnits->currentIndex()].first;
+}
+
+u256 Transact::gasPrice() const
+{
+	if (ui->gasPriceUnits->currentIndex() == -1)
+		return 0;
+	return ui->gasPrice->value() * units()[units().size() - 1 - ui->gasPriceUnits->currentIndex()].first;
+}
+
+u256 Transact::total() const
+{
+	return value() + fee();
+}
+
+void Transact::updateDestination()
+{
+	cwatch << "updateDestination()";
+	QString s;
+	for (auto i: ethereum()->addresses())
+		if ((s = m_context->pretty(i)).size())
+			// A namereg address
+			if (ui->destination->findText(s, Qt::MatchExactly | Qt::MatchCaseSensitive) == -1)
+				ui->destination->addItem(s);
+	for (int i = 0; i < ui->destination->count(); ++i)
+		if (ui->destination->itemText(i) != "(Create Contract)" && !m_context->fromString(ui->destination->itemText(i)))
+			ui->destination->removeItem(i--);
+}
+
+void Transact::updateFee()
+{
+	ui->fee->setText(QString("(gas sub-total: %1)").arg(formatBalance(fee()).c_str()));
+	auto totalReq = total();
+	ui->total->setText(QString("Total: %1").arg(formatBalance(totalReq).c_str()));
+
+	bool ok = false;
+	for (auto i: m_myKeys)
+		if (ethereum()->balanceAt(i.address()) >= totalReq)
+		{
+			ok = true;
+			break;
+		}
+	ui->send->setEnabled(ok);
+	QPalette p = ui->total->palette();
+	p.setColor(QPalette::WindowText, QColor(ok ? 0x00 : 0x80, 0x00, 0x00));
+	ui->total->setPalette(p);
+}
+
+string Transact::getFunctionHashes(dev::solidity::CompilerStack const& _compiler, string const& _contractName)
+{
+	string ret = "";
+	auto const& contract = _compiler.getContractDefinition(_contractName);
+	auto interfaceFunctions = contract.getInterfaceFunctions();
+
+	for (auto const& it: interfaceFunctions)
+	{
+		ret += it.first.abridged();
+		ret += " :";
+		ret += it.second->getDeclaration().getName() + "\n";
+	}
+	return ret;
+}
+
+void Transact::on_destination_currentTextChanged()
+{
+	if (ui->destination->currentText().size() && ui->destination->currentText() != "(Create Contract)")
+		if (Address a = m_context->fromString(ui->destination->currentText()))
+			ui->calculatedName->setText(m_context->render(a));
+		else
+			ui->calculatedName->setText("Unknown Address");
+	else
+		ui->calculatedName->setText("Create Contract");
+	rejigData();
+//	updateFee();
+}
+
+void Transact::rejigData()
+{
+	if (isCreation())
+	{
+		string src = ui->data->toPlainText().toStdString();
+		vector<string> errors;
+		QString lll;
+		QString solidity;
+		if (src.find_first_not_of("1234567890abcdefABCDEF") == string::npos && src.size() % 2 == 0)
+		{
+			m_data = fromHex(src);
+		}
+		else if (sourceIsSolidity(src))
+		{
+			dev::solidity::CompilerStack compiler;
+			try
+			{
+//				compiler.addSources(dev::solidity::StandardSources);
+				m_data = compiler.compile(src, ui->optimize->isChecked());
+				solidity = "<h4>Solidity</h4>";
+				solidity += "<pre>var " + QString::fromStdString(compiler.defaultContractName()) + " = web3.eth.contractFromAbi(" + QString::fromStdString(compiler.getInterface()).replace(QRegExp("\\s"), "").toHtmlEscaped() + ");</pre>";
+				solidity += "<pre>" + QString::fromStdString(compiler.getSolidityInterface()).toHtmlEscaped() + "</pre>";
+				solidity += "<pre>" + QString::fromStdString(getFunctionHashes(compiler)).toHtmlEscaped() + "</pre>";
+			}
+			catch (dev::Exception const& exception)
+			{
+				ostringstream error;
+				solidity::SourceReferenceFormatter::printExceptionInformation(error, exception, "Error", compiler);
+				solidity = "<h4>Solidity</h4><pre>" + QString::fromStdString(error.str()).toHtmlEscaped() + "</pre>";
+			}
+			catch (...)
+			{
+				solidity = "<h4>Solidity</h4><pre>Uncaught exception.</pre>";
+			}
+		}
+#ifndef _MSC_VER
+		else if (sourceIsSerpent(src))
+		{
+			try
+			{
+				m_data = dev::asBytes(::compile(src));
+				for (auto& i: errors)
+					i = "(LLL " + i + ")";
+			}
+			catch (string err)
+			{
+				errors.push_back("Serpent " + err);
+			}
+		}
+#endif
+		else
+		{
+			m_data = compileLLL(src, ui->optimize->isChecked(), &errors);
+			if (errors.empty())
+			{
+				auto asmcode = compileLLLToAsm(src, false);
+				lll = "<h4>Pre</h4><pre>" + QString::fromStdString(asmcode).toHtmlEscaped() + "</pre>";
+				if (ui->optimize->isChecked())
+				{
+					asmcode = compileLLLToAsm(src, true);
+					lll = "<h4>Opt</h4><pre>" + QString::fromStdString(asmcode).toHtmlEscaped() + "</pre>" + lll;
+				}
+			}
+		}
+		QString errs;
+		if (errors.size())
+		{
+			errs = "<h4>Errors</h4>";
+			for (auto const& i: errors)
+				errs.append("<div style=\"border-left: 6px solid #c00; margin-top: 2px\">" + QString::fromStdString(i).toHtmlEscaped() + "</div>");
+		}
+		ui->code->setHtml(errs + lll + solidity + "<h4>Code</h4>" + QString::fromStdString(disassemble(m_data)).toHtmlEscaped() + "<h4>Hex</h4>" Div(Mono) + QString::fromStdString(toHex(m_data)) + "</div>");
+		ui->gas->setMinimum((qint64)Interface::txGas(m_data, 0));
+		if (!ui->gas->isEnabled())
+			ui->gas->setValue(m_backupGas);
+		ui->gas->setEnabled(true);
+	}
+	else
+	{
+		m_data = parseData(ui->data->toPlainText().toStdString());
+		auto to = m_context->fromString(ui->destination->currentText());
+		QString natspec;
+		if (ethereum()->codeAt(to, 0).size())
+		{
+			string userNotice = m_natSpecDB->getUserNotice(ethereum()->postState().codeHash(to), m_data);
+			if (userNotice.empty())
+				natspec = "Destination contract unknown.";
+			else
+			{
+				NatspecExpressionEvaluator evaluator;
+				natspec = evaluator.evalExpression(QString::fromStdString(userNotice));
+			}
+			ui->gas->setMinimum((qint64)Interface::txGas(m_data, 1));
+			if (!ui->gas->isEnabled())
+				ui->gas->setValue(m_backupGas);
+			ui->gas->setEnabled(true);
+		}
+		else
+		{
+			natspec += "Destination not a contract.";
+			if (ui->gas->isEnabled())
+				m_backupGas = ui->gas->value();
+			ui->gas->setValue((qint64)Interface::txGas(m_data));
+			ui->gas->setEnabled(false);
+		}
+		ui->code->setHtml("<h3>NatSpec</h3>" + natspec + "<h3>Dump</h3>" + QString::fromStdString(dev::memDump(m_data, 8, true)) + "<h3>Hex</h3>" + Div(Mono) + QString::fromStdString(toHex(m_data)) + "</div>");
+	}
+	updateFee();
+}
+
+void Transact::on_send_clicked()
+{
+	u256 totalReq = value() + fee();
+	for (auto const& i: m_myKeys)
+		if (ethereum()->balanceAt(i.address(), 0) >= totalReq)
+		{
+			Secret s = i.secret();
+			if (isCreation())
+			{
+				// If execution is a contract creation, add Natspec to
+				// a local Natspec LEVELDB
+				ethereum()->transact(s, value(), m_data, ui->gas->value(), gasPrice());
+				string src = ui->data->toPlainText().toStdString();
+				if (sourceIsSolidity(src))
+					try
+					{
+						dev::solidity::CompilerStack compiler;
+						m_data = compiler.compile(src, ui->optimize->isChecked());
+						for (string const& s: compiler.getContractNames())
+						{
+							h256 contractHash = compiler.getContractCodeHash(s);
+							m_natSpecDB->add(contractHash, compiler.getMetadata(s, dev::solidity::DocumentationType::NatspecUser));
+						}
+					}
+					catch (...)
+					{
+					}
+				close();
+				return;
+			}
+			else
+				ethereum()->transact(s, value(), m_context->fromString(ui->destination->currentText()), m_data, ui->gas->value(), gasPrice());
+			return;
+		}
+	QMessageBox::critical(this, "Transaction Failed", "Couldn't make transaction: no single account contains at least the required amount.");
+}
+
+void Transact::on_debug_clicked()
+{
+	try
+	{
+		u256 totalReq = value() + fee();
+		for (auto i: m_myKeys)
+			if (ethereum()->balanceAt(i.address()) >= totalReq)
+			{
+				State st(ethereum()->postState());
+				Secret s = i.secret();
+				Transaction t = isCreation() ?
+					Transaction(value(), gasPrice(), ui->gas->value(), m_data, st.transactionsFrom(dev::toAddress(s)), s) :
+					Transaction(value(), gasPrice(), ui->gas->value(), m_context->fromString(ui->destination->currentText()), m_data, st.transactionsFrom(dev::toAddress(s)), s);
+				Debugger dw(m_context, this);
+				Executive e(st, ethereum()->blockChain(), 0);
+				dw.populate(e, t);
+				dw.exec();
+				return;
+			}
+			QMessageBox::critical(this, "Transaction Failed", "Couldn't make transaction: no single account contains at least the required amount.");
+	}
+	catch (dev::Exception const& _e)
+	{
+		QMessageBox::critical(this, "Transaction Failed", "Couldn't make transaction. Low-level error: " + QString::fromStdString(diagnostic_information(_e)));
+		// this output is aimed at developers, reconsider using _e.what for more user friendly output.
+	}
+}
diff --git a/alethzero/Transact.h b/alethzero/Transact.h
new file mode 100644
index 000000000..afb45f62d
--- /dev/null
+++ b/alethzero/Transact.h
@@ -0,0 +1,82 @@
+/*
+	This file is part of cpp-ethereum.
+
+	cpp-ethereum is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	cpp-ethereum is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file Transact.h
+ * @author Gav Wood <i@gavwood.com>
+ * @date 2015
+ */
+
+#pragma once
+
+#include <libdevcore/RLP.h>
+#include <libethcore/CommonEth.h>
+#include <libethereum/Transaction.h>
+#include <QDialog>
+#include <QMap>
+#include <QList>
+#include "Context.h"
+
+namespace Ui { class Transact; }
+namespace dev { namespace eth { class Client; } }
+namespace dev { namespace solidity { class CompilerStack; } }
+
+class Transact: public QDialog
+{
+	Q_OBJECT
+
+public:
+	explicit Transact(Context* _context, QWidget* _parent = 0);
+	~Transact();
+
+	void setEnvironment(QList<dev::KeyPair> _myKeys, dev::eth::Client* _eth, NatSpecFace* _natSpecDB);
+
+private slots:
+	void on_destination_currentTextChanged();
+	void on_value_valueChanged() { updateFee(); }
+	void on_gas_valueChanged() { updateFee(); }
+	void on_valueUnits_currentIndexChanged() { updateFee(); }
+	void on_gasPriceUnits_currentIndexChanged() { updateFee(); }
+	void on_gasPrice_valueChanged() { updateFee(); }
+	void on_data_textChanged() { rejigData(); }
+	void on_optimize_clicked() { rejigData(); }
+	void on_send_clicked();
+	void on_debug_clicked();
+	void on_cancel_clicked() { close(); }
+
+private:
+	dev::eth::Client* ethereum() { return m_ethereum; }
+	void rejigData();
+
+	void updateDestination();
+	void updateFee();
+	bool isCreation() const;
+	dev::u256 fee() const;
+	dev::u256 total() const;
+	dev::u256 value() const;
+	dev::u256 gasPrice() const;
+
+	std::string getFunctionHashes(dev::solidity::CompilerStack const& _compiler, std::string const& _contractName = std::string());
+
+	Ui::Transact* ui;
+
+	unsigned m_backupGas;
+	dev::bytes m_data;
+
+	QList<dev::KeyPair> m_myKeys;
+	dev::eth::Client* m_ethereum;
+	Context* m_context;
+	NatSpecFace* m_natSpecDB;
+};
diff --git a/alethzero/Transact.ui b/alethzero/Transact.ui
new file mode 100644
index 000000000..c66e47aa8
--- /dev/null
+++ b/alethzero/Transact.ui
@@ -0,0 +1,244 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Transact</class>
+ <widget class="QDialog" name="Transact">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>543</width>
+    <height>695</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Dialog</string>
+  </property>
+  <layout class="QGridLayout" name="gridLayout">
+   <item row="2" column="1" colspan="2">
+    <widget class="QSpinBox" name="value">
+     <property name="suffix">
+      <string/>
+     </property>
+     <property name="maximum">
+      <number>430000000</number>
+     </property>
+     <property name="value">
+      <number>0</number>
+     </property>
+    </widget>
+   </item>
+   <item row="2" column="0">
+    <widget class="QLabel" name="label5_2">
+     <property name="text">
+      <string>&amp;Amount</string>
+     </property>
+     <property name="buddy">
+      <cstring>value</cstring>
+     </property>
+    </widget>
+   </item>
+   <item row="1" column="1" colspan="3">
+    <widget class="QLineEdit" name="calculatedName">
+     <property name="enabled">
+      <bool>false</bool>
+     </property>
+     <property name="readOnly">
+      <bool>true</bool>
+     </property>
+     <property name="placeholderText">
+      <string/>
+     </property>
+    </widget>
+   </item>
+   <item row="5" column="0" colspan="4">
+    <widget class="QSplitter" name="splitter_5">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <widget class="QPlainTextEdit" name="data">
+      <property name="frameShape">
+       <enum>QFrame::NoFrame</enum>
+      </property>
+      <property name="lineWidth">
+       <number>0</number>
+      </property>
+     </widget>
+     <widget class="QTextEdit" name="code">
+      <property name="focusPolicy">
+       <enum>Qt::ClickFocus</enum>
+      </property>
+      <property name="frameShape">
+       <enum>QFrame::NoFrame</enum>
+      </property>
+      <property name="lineWidth">
+       <number>0</number>
+      </property>
+      <property name="readOnly">
+       <bool>true</bool>
+      </property>
+     </widget>
+    </widget>
+   </item>
+   <item row="3" column="3">
+    <widget class="QComboBox" name="gasPriceUnits"/>
+   </item>
+   <item row="4" column="1" colspan="2">
+    <widget class="QLabel" name="fee">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="MinimumExpanding" vsizetype="Preferred">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <property name="text">
+      <string/>
+     </property>
+     <property name="alignment">
+      <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+     </property>
+    </widget>
+   </item>
+   <item row="0" column="0">
+    <widget class="QLabel" name="label5">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <property name="text">
+      <string>&amp;To</string>
+     </property>
+     <property name="buddy">
+      <cstring>destination</cstring>
+     </property>
+    </widget>
+   </item>
+   <item row="2" column="3">
+    <widget class="QComboBox" name="valueUnits"/>
+   </item>
+   <item row="7" column="2">
+    <widget class="QPushButton" name="debug">
+     <property name="text">
+      <string>&amp;Debug</string>
+     </property>
+    </widget>
+   </item>
+   <item row="7" column="3">
+    <widget class="QPushButton" name="send">
+     <property name="text">
+      <string>&amp;Execute</string>
+     </property>
+     <property name="default">
+      <bool>false</bool>
+     </property>
+    </widget>
+   </item>
+   <item row="3" column="0">
+    <widget class="QLabel" name="label_6">
+     <property name="text">
+      <string>&amp;Gas</string>
+     </property>
+     <property name="buddy">
+      <cstring>gas</cstring>
+     </property>
+    </widget>
+   </item>
+   <item row="3" column="1">
+    <widget class="QSpinBox" name="gas">
+     <property name="suffix">
+      <string> gas</string>
+     </property>
+     <property name="minimum">
+      <number>1</number>
+     </property>
+     <property name="maximum">
+      <number>430000000</number>
+     </property>
+     <property name="value">
+      <number>10000</number>
+     </property>
+    </widget>
+   </item>
+   <item row="3" column="2">
+    <widget class="QSpinBox" name="gasPrice">
+     <property name="prefix">
+      <string>@ </string>
+     </property>
+     <property name="minimum">
+      <number>1</number>
+     </property>
+     <property name="maximum">
+      <number>430000000</number>
+     </property>
+    </widget>
+   </item>
+   <item row="4" column="3">
+    <widget class="QCheckBox" name="optimize">
+     <property name="text">
+      <string>&amp;Optimise</string>
+     </property>
+     <property name="checked">
+      <bool>true</bool>
+     </property>
+    </widget>
+   </item>
+   <item row="4" column="0">
+    <widget class="QLabel" name="label_2">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="Preferred" vsizetype="Maximum">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <property name="text">
+      <string>D&amp;ata</string>
+     </property>
+     <property name="alignment">
+      <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignVCenter</set>
+     </property>
+     <property name="buddy">
+      <cstring>data</cstring>
+     </property>
+    </widget>
+   </item>
+   <item row="0" column="1" colspan="3">
+    <widget class="QComboBox" name="destination">
+     <property name="editable">
+      <bool>true</bool>
+     </property>
+     <item>
+      <property name="text">
+       <string>(Create Contract)</string>
+      </property>
+     </item>
+    </widget>
+   </item>
+   <item row="6" column="0" colspan="4">
+    <widget class="QLabel" name="total">
+     <property name="sizePolicy">
+      <sizepolicy hsizetype="MinimumExpanding" vsizetype="Preferred">
+       <horstretch>0</horstretch>
+       <verstretch>0</verstretch>
+      </sizepolicy>
+     </property>
+     <property name="text">
+      <string/>
+     </property>
+    </widget>
+   </item>
+   <item row="7" column="0">
+    <widget class="QPushButton" name="cancel">
+     <property name="text">
+      <string>&amp;Cancel</string>
+     </property>
+     <property name="shortcut">
+      <string>Esc</string>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/cmake/EthDependencies.cmake b/cmake/EthDependencies.cmake
index bcb0780c1..fb6b09bb8 100644
--- a/cmake/EthDependencies.cmake
+++ b/cmake/EthDependencies.cmake
@@ -59,6 +59,10 @@ if (JSONRPC)
 	message (" - json-rpc-cpp lib   : ${JSON_RPC_CPP_LIBRARIES}")
 	add_definitions(-DETH_JSONRPC)
 
+ 	find_package(MHD) 
+	message(" - microhttpd header: ${MHD_INCLUDE_DIRS}")
+	message(" - microhttpd lib   : ${MHD_LIBRARIES}")
+
 endif() #JSONRPC
 
 # TODO readline package does not yet check for correct version number
diff --git a/cmake/FindMHD.cmake b/cmake/FindMHD.cmake
new file mode 100755
index 000000000..84875bc47
--- /dev/null
+++ b/cmake/FindMHD.cmake
@@ -0,0 +1,47 @@
+# Find microhttpd
+#
+# Find the microhttpd includes and library
+#
+# if you need to add a custom library search path, do it via via CMAKE_PREFIX_PATH
+#
+# This module defines
+#  MHD_INCLUDE_DIRS, where to find header, etc.
+#  MHD_LIBRARIES, the libraries needed to use jsoncpp.
+#  MHD_FOUND, If false, do not try to use jsoncpp.
+
+find_path(
+	MHD_INCLUDE_DIR
+	NAMES microhttpd.h
+	DOC "microhttpd include dir"
+)
+
+find_library(
+	MHD_LIBRARY
+	NAMES microhttpd microhttpd-10 libmicrohttpd libmicrohttpd-dll
+	DOC "microhttpd library"
+)
+
+set(MHD_INCLUDE_DIRS ${MHD_INCLUDE_DIR})
+set(MHD_LIBRARIES ${MHD_LIBRARY})
+
+# debug library on windows
+# same naming convention as in QT (appending debug library with d)
+# boost is using the same "hack" as us with "optimized" and "debug"
+# official MHD project actually uses _d suffix
+if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
+	find_library(
+		MHD_LIBRARY_DEBUG
+		NAMES microhttpd_d microhttpd-10_d libmicrohttpd_d libmicrohttpd-dll_d
+		DOC "mhd debug library"
+	)
+
+	set(MHD_LIBRARIES optimized ${MHD_LIBRARIES} debug ${MHD_LIBRARY_DEBUG})
+
+endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(mhd DEFAULT_MSG
+	MHD_INCLUDE_DIR MHD_LIBRARY)
+
+mark_as_advanced(MHD_INCLUDE_DIR MHD_LIBRARY)
+
diff --git a/evmjit/libevmjit/Arith256.cpp b/evmjit/libevmjit/Arith256.cpp
index 15d18c814..99ca63ea6 100644
--- a/evmjit/libevmjit/Arith256.cpp
+++ b/evmjit/libevmjit/Arith256.cpp
@@ -416,7 +416,7 @@ namespace
 		explicit operator uint128()
 		{
 			uint128 r = lo;
-			r = r + ((uint128) mid) << 64;
+			r = (r + ((uint128) mid)) << 64;
 			return r;
 		}
 
diff --git a/extdep/CMakeLists.txt b/extdep/CMakeLists.txt
index fdee34602..99f76800c 100644
--- a/extdep/CMakeLists.txt
+++ b/extdep/CMakeLists.txt
@@ -35,14 +35,18 @@ if (ETH_COMPILE)
 	include(compile/boost.cmake)
 else()	
 	eth_download(jsoncpp)
-	eth_download(json-rpc-cpp OSX_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/scripts/json-rpc-cpp_osx.sh)
+	eth_download(microhttpd)
+	eth_download(json-rpc-cpp
+		VERSION 4.2
+		OSX_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/scripts/json-rpc-cpp_osx.sh
+	)
 	
 	if (APPLE)
 		eth_download(snappy OSX_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/scripts/snappy_osx.sh)
 	endif()
 
 	eth_download(leveldb OSX_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/scripts/leveldb_osx.sh)
-	eth_download(qt)
+	eth_download(qt VERSION 5.4)
 	eth_download(cryptopp)
 	eth_download(boost)
 	eth_download(curl)
diff --git a/libdevcore/vector_ref.h b/libdevcore/vector_ref.h
index 4b1df924d..9039c3149 100644
--- a/libdevcore/vector_ref.h
+++ b/libdevcore/vector_ref.h
@@ -1,7 +1,8 @@
 #pragma once
 
-#include <type_traits>
+#include <cstring>
 #include <cassert>
+#include <type_traits>
 #include <vector>
 #include <string>
 
@@ -18,7 +19,7 @@ public:
 
 	vector_ref(): m_data(nullptr), m_count(0) {}
 	vector_ref(_T* _data, size_t _count): m_data(_data), m_count(_count) {}
-	vector_ref(std::string* _data): m_data((_T*)_data->data()), m_count(_data->size() / sizeof(_T)) {}
+	vector_ref(typename std::conditional<std::is_const<_T>::value, std::string const*, std::string*>::type _data): m_data((_T*)_data->data()), m_count(_data->size() / sizeof(_T)) {}
 	vector_ref(typename std::conditional<std::is_const<_T>::value, std::vector<typename std::remove_const<_T>::type> const*, std::vector<_T>*>::type _data): m_data(_data->data()), m_count(_data->size()) {}
 	vector_ref(typename std::conditional<std::is_const<_T>::value, std::string const&, std::string&>::type _data): m_data((_T*)_data.data()), m_count(_data.size() / sizeof(_T)) {}
 #ifdef STORAGE_LEVELDB_INCLUDE_DB_H_
diff --git a/libethcore/CommonEth.cpp b/libethcore/CommonEth.cpp
index 47344a156..e07eb04ba 100644
--- a/libethcore/CommonEth.cpp
+++ b/libethcore/CommonEth.cpp
@@ -35,16 +35,6 @@ namespace eth
 const unsigned c_protocolVersion = 53;
 const unsigned c_databaseVersion = 5;
 
-template <size_t n> u256 exp10()
-{
-	return exp10<n - 1>() * u256(10);
-}
-
-template <> u256 exp10<0>()
-{
-	return u256(1);
-}
-
 vector<pair<u256, string>> const& units()
 {
 	static const vector<pair<u256, string>> s_units =
diff --git a/libethcore/CommonEth.h b/libethcore/CommonEth.h
index 966794953..79525082f 100644
--- a/libethcore/CommonEth.h
+++ b/libethcore/CommonEth.h
@@ -47,26 +47,21 @@ std::vector<std::pair<u256, std::string>> const& units();
 /// The log bloom's size (512 bit).
 using LogBloom = h512;
 
+template <size_t n> inline u256 exp10()
+{
+	return exp10<n - 1>() * u256(10);
+}
+
+template <> inline u256 exp10<0>()
+{
+	return u256(1);
+}
+
 // The various denominations; here for ease of use where needed within code.
-/*static const u256 Uether = ((((u256(1000000000) * 1000000000) * 1000000000) * 1000000000) * 1000000000) * 1000000000;
-static const u256 Vether = ((((u256(1000000000) * 1000000000) * 1000000000) * 1000000000) * 1000000000) * 1000000;
-static const u256 Dether = ((((u256(1000000000) * 1000000000) * 1000000000) * 1000000000) * 1000000000) * 1000;
-static const u256 Nether = (((u256(1000000000) * 1000000000) * 1000000000) * 1000000000) * 1000000000;
-static const u256 Yether = (((u256(1000000000) * 1000000000) * 1000000000) * 1000000000) * 1000000;
-static const u256 Zether = (((u256(1000000000) * 1000000000) * 1000000000) * 1000000000) * 1000;
-static const u256 Eether = ((u256(1000000000) * 1000000000) * 1000000000) * 1000000000;
-static const u256 Pether = ((u256(1000000000) * 1000000000) * 1000000000) * 1000000;
-static const u256 Tether = ((u256(1000000000) * 1000000000) * 1000000000) * 1000;
-static const u256 Gether = (u256(1000000000) * 1000000000) * 1000000000;
-static const u256 Mether = (u256(1000000000) * 1000000000) * 1000000;
-static const u256 grand = (u256(1000000000) * 1000000000) * 1000;*/
-static const u256 ether = u256(1000000000) * 1000000000;
-static const u256 finney = u256(1000000000) * 1000000;
-static const u256 szabo = u256(1000000000) * 1000;
-/*static const u256 Gwei = u256(1000000000);
-static const u256 Mwei = u256(1000000);
-static const u256 Kwei = u256(1000);*/
-static const u256 wei = u256(1);
+static const u256 ether = exp10<18>();
+static const u256 finney = exp10<15>();
+static const u256 szabo = exp10<12>();
+static const u256 wei = exp10<0>();
 
 }
 }
diff --git a/libethcore/CommonJS.h b/libethcore/CommonJS.h
index 2f82d8945..abe74f0af 100644
--- a/libethcore/CommonJS.h
+++ b/libethcore/CommonJS.h
@@ -144,6 +144,7 @@ inline Address jsToAddress(std::string const& _s) { return jsToFixed<sizeof(dev:
 
 struct TransactionSkeleton
 {
+	bool creation = false;
 	Address from;
 	Address to;
 	u256 value;
diff --git a/libethereum/BlockChain.h b/libethereum/BlockChain.h
index 50ad78dac..0c5587d2a 100644
--- a/libethereum/BlockChain.h
+++ b/libethereum/BlockChain.h
@@ -112,6 +112,10 @@ public:
 	bytes block(h256 _hash) const;
 	bytes block() const { return block(currentHash()); }
 
+	/// Get a block's transaction (RLP format) for the given block hash (or the most recent mined if none given) & index. Thread-safe.
+	bytes transaction(h256 _hash, unsigned _i) const { bytes b = block(_hash); return RLP(b)[1][_i].data().toBytes(); }
+	bytes transaction(unsigned _i) const { return transaction(currentHash(), _i); }
+
 	/// Get a number for the given hash (or the most recent mined if none given). Thread-safe.
 	unsigned number(h256 _hash) const { return details(_hash).number; }
 	unsigned number() const { return number(currentHash()); }
diff --git a/libethereum/Executive.cpp b/libethereum/Executive.cpp
index cea7d21f4..f407a6f0b 100644
--- a/libethereum/Executive.cpp
+++ b/libethereum/Executive.cpp
@@ -54,6 +54,12 @@ bool Executive::setup(bytesConstRef _rlp)
 {
 	// Entry point for a user-executed transaction.
 	m_t = Transaction(_rlp, CheckSignature::Sender);
+	return setup();
+}
+
+bool Executive::setup()
+{
+	// Entry point for a user-executed transaction.
 
 	// Avoid invalid transactions.
 	auto nonceReq = m_s.transactionsFrom(m_t.sender());
diff --git a/libethereum/Executive.h b/libethereum/Executive.h
index d743e3746..bb5563604 100644
--- a/libethereum/Executive.h
+++ b/libethereum/Executive.h
@@ -62,6 +62,9 @@ public:
 	/// Set up the executive for evaluating a transaction. You must call finalize() following this.
 	/// @returns true iff go() must be called (and thus a VM execution in required).
 	bool setup(bytesConstRef _transaction);
+	/// Set up the executive for evaluating a transaction. You must call finalize() following this.
+	/// @returns true iff go() must be called (and thus a VM execution in required).
+	bool setup(Transaction const& _transaction) { m_t = _transaction; return setup(); }
 	/// Finalise a transaction previously set up with setup().
 	/// @warning Only valid after setup(), and possibly go().
 	void finalize();
@@ -101,6 +104,8 @@ public:
 	bool excepted() const { return m_excepted; }
 
 private:
+	bool setup();
+
 	State& m_s;							///< The state to which this operation/transaction is applied.
 	LastHashes m_lastHashes;
 	std::shared_ptr<ExtVM> m_ext;		///< The VM externality object for the VM execution or null if no VM is required.
diff --git a/libjsqrc/setup.js b/libjsqrc/setup.js
index 2aa54ed30..fa1921877 100644
--- a/libjsqrc/setup.js
+++ b/libjsqrc/setup.js
@@ -20,8 +20,6 @@
  * @date 2014
  */
 
-navigator.qt = _web3;
-
 var web3 = require('web3');
-web3.setProvider(new web3.providers.QtSyncProvider());
+web3.setProvider(new web3.providers.HttpSyncProvider());
 
diff --git a/libqwebthree/CMakeLists.txt b/libqwebthree/CMakeLists.txt
deleted file mode 100644
index 4de131ead..000000000
--- a/libqwebthree/CMakeLists.txt
+++ /dev/null
@@ -1,41 +0,0 @@
-cmake_policy(SET CMP0015 NEW)
-# let cmake autolink dependencies on windows
-cmake_policy(SET CMP0020 NEW)
-# this policy was introduced in cmake 3.0
-# remove if, once 3.0 will be used on unix
-if (${CMAKE_MAJOR_VERSION} GREATER 2)
-	# old policy do not use MACOSX_RPATH
-	cmake_policy(SET CMP0042 OLD)
-	cmake_policy(SET CMP0043 OLD)
-endif()
-
-set(CMAKE_INCLUDE_CURRENT_DIR ON)
-aux_source_directory(. SRC_LIST)
-
-include_directories(${JSON_RPC_CPP_INCLUDE_DIRS})
-include_directories(..)
-
-set(EXECUTABLE qwebthree)
-
-file(GLOB HEADERS "*.h")
-
-if(ETH_STATIC)
-	add_library(${EXECUTABLE} STATIC ${RESOURCE_ADDED} ${SRC_LIST} ${HEADERS})
-else()
-	add_library(${EXECUTABLE} SHARED ${RESOURCE_ADDED} ${SRC_LIST} ${HEADERS})
-endif()
-
-target_link_libraries(${EXECUTABLE} Qt5::Core)
-target_link_libraries(${EXECUTABLE} Qt5::Gui)
-target_link_libraries(${EXECUTABLE} Qt5::WebKit)
-target_link_libraries(${EXECUTABLE} Qt5::WebKitWidgets)
-target_link_libraries(${EXECUTABLE} Qt5::Widgets)
-target_link_libraries(${EXECUTABLE} Qt5::Network)
-target_link_libraries(${EXECUTABLE} Qt5::Quick)
-target_link_libraries(${EXECUTABLE} Qt5::Qml)
-target_link_libraries(${EXECUTABLE} ${JSON_RPC_CPP_SERVER_LIBRARIES})
-target_link_libraries(${EXECUTABLE} ethereum)
-target_link_libraries(${EXECUTABLE} secp256k1)
-
-install( TARGETS ${EXECUTABLE} ARCHIVE DESTINATION lib LIBRARY DESTINATION lib )
-install( FILES ${HEADERS} DESTINATION include/${EXECUTABLE} )
diff --git a/libqwebthree/QWebThree.cpp b/libqwebthree/QWebThree.cpp
deleted file mode 100644
index 31f2f6b92..000000000
--- a/libqwebthree/QWebThree.cpp
+++ /dev/null
@@ -1,107 +0,0 @@
-/*
-	This file is part of cpp-ethereum.
-
-	cpp-ethereum is free software: you can redistribute it and/or modify
-	it under the terms of the GNU General Public License as published by
-	the Free Software Foundation, either version 3 of the License, or
-	(at your option) any later version.
-
-	cpp-ethereum is distributed in the hope that it will be useful,
-	but WITHOUT ANY WARRANTY; without even the implied warranty of
-	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-	GNU General Public License for more details.
-
-	You should have received a copy of the GNU General Public License
-	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
-*/
-/** @file QWebThree.cpp
- * @authors:
- *   Gav Wood <i@gavwood.com>
- *   Marek Kotewicz <marek@ethdev.com>
- * @date 2014
- */
-
-#include <QtCore/QtCore>
-#include "QWebThree.h"
-
-using namespace std;
-
-QWebThree::QWebThree(QObject* _p): QObject(_p)
-{
-	moveToThread(_p->thread());
-}
-
-QWebThree::~QWebThree()
-{
-	clientDieing();
-}
-
-void QWebThree::clientDieing()
-{
-	this->disconnect();
-}
-
-QString QWebThree::callMethod(QString _json)
-{
-	emit processData(_json, ""); // it's synchronous
-	return m_response;
-}
-
-void QWebThree::onDataProcessed(QString _json, QString)
-{
-	QJsonObject f = QJsonDocument::fromJson(_json.toUtf8()).object();
-	syncResponse(QString::fromUtf8(QJsonDocument(f).toJson()));
-}
-
-void QWebThree::syncResponse(QString _json)
-{
-	m_response = _json;
-}
-
-QWebThreeConnector::QWebThreeConnector()
-{
-}
-
-QWebThreeConnector::~QWebThreeConnector()
-{
-	StopListening();
-}
-
-void QWebThreeConnector::setQWeb(QWebThree* _q)
-{
-	m_qweb = _q;
-	if (m_isListening)
-	{
-		StopListening();
-		StartListening();
-	}
-}
-
-bool QWebThreeConnector::StartListening()
-{
-	m_isListening = true;
-	if (m_qweb)
-	{
-		connect(m_qweb, SIGNAL(processData(QString, QString)), this, SLOT(onProcessData(QString, QString)));
-		connect(this, SIGNAL(dataProcessed(QString, QString)), m_qweb, SLOT(onDataProcessed(QString, QString)));
-	}
-	return true;
-}
-
-bool QWebThreeConnector::StopListening()
-{
-	this->disconnect();
-	return true;
-}
-
-bool QWebThreeConnector::SendResponse(std::string const& _response, void* _addInfo)
-{
-	emit dataProcessed(QString::fromStdString(_response), *(QString*)_addInfo);
-	return true;
-}
-
-void QWebThreeConnector::onProcessData(QString const& _json, QString const& _addInfo)
-{
-	OnRequest(_json.toStdString(), (void*)&_addInfo);
-}
-
diff --git a/libqwebthree/QWebThree.h b/libqwebthree/QWebThree.h
deleted file mode 100644
index 72c434649..000000000
--- a/libqwebthree/QWebThree.h
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
-	This file is part of cpp-ethereum.
-
-	cpp-ethereum is free software: you can redistribute it and/or modify
-	it under the terms of the GNU General Public License as published by
-	the Free Software Foundation, either version 3 of the License, or
-	(at your option) any later version.
-
-	cpp-ethereum is distributed in the hope that it will be useful,
-	but WITHOUT ANY WARRANTY; without even the implied warranty of
-	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-	GNU General Public License for more details.
-
-	You should have received a copy of the GNU General Public License
-	along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
-*/
-/** @file QWebThree.h
- * @authors:
- *   Gav Wood <i@gavwood.com>
- *   Marek Kotewicz <marek@ethdev.com>
- * @date 2014
- */
-
-#pragma once
-
-#include <QtCore/QObject>
-#include <QtCore/QString>
-#include <jsonrpccpp/server.h>
-
-class QWebThree: public QObject
-{
-	Q_OBJECT
-	
-public:
-	QWebThree(QObject* _p);
-	virtual ~QWebThree();
-	void clientDieing();
-	
-	Q_INVOKABLE QString callMethod(QString _json);
-	void syncResponse(QString _json);
-	
-public slots:
-	void onDataProcessed(QString _json, QString _addInfo);
-	
-signals:
-	void processData(QString _json, QString _addInfo);
-	void response(QString _json);
-	void onNewId(QString _id);
-	
-private:
-	QString m_response;
-};
-
-class QWebThreeConnector: public QObject, public jsonrpc::AbstractServerConnector
-{
-	Q_OBJECT
-	
-public:
-	QWebThreeConnector();
-	virtual ~QWebThreeConnector();
-	
-	void setQWeb(QWebThree *_q);
-	
-	virtual bool StartListening();
-	virtual bool StopListening();
-	virtual bool SendResponse(std::string const& _response, void* _addInfo = NULL);
-	
-public slots:
-	void onProcessData(QString const& _json, QString const& _addInfo);
-
-signals:
-	void dataProcessed(QString const& _json, QString const& _addInfo);
-	
-private:
-	QWebThree* m_qweb = nullptr;
-	bool m_isListening;
-};
-
-#define QETH_INSTALL_JS_NAMESPACE(_frame, _env, qweb) [_frame, _env, qweb]() \
-{ \
-	_frame->disconnect(); \
-	_frame->addToJavaScriptWindowObject("_web3", qweb, QWebFrame::ScriptOwnership); \
-	_frame->addToJavaScriptWindowObject("env", _env, QWebFrame::QtOwnership); \
-	_frame->evaluateJavaScript(contentsOfQResource(":/js/bignumber.min.js")); \
-	_frame->evaluateJavaScript(contentsOfQResource(":/js/webthree.js")); \
-	_frame->evaluateJavaScript(contentsOfQResource(":/js/setup.js")); \
-}
-
-
diff --git a/libsolidity/AST.cpp b/libsolidity/AST.cpp
index 3c6b6007c..0dbad433f 100644
--- a/libsolidity/AST.cpp
+++ b/libsolidity/AST.cpp
@@ -206,6 +206,13 @@ vector<pair<FixedHash<4>, FunctionTypePointer>> const& ContractDefinition::getIn
 	return *m_interfaceFunctionList;
 }
 
+TypePointer EnumValue::getType(ContractDefinition const*) const
+{
+	EnumDefinition const* parentDef = dynamic_cast<EnumDefinition const*>(getScope());
+	solAssert(parentDef, "Enclosing Scope of EnumValue was not set");
+	return make_shared<EnumType>(*parentDef);
+}
+
 void InheritanceSpecifier::checkTypeRequirements()
 {
 	m_baseName->checkTypeRequirements();
@@ -255,6 +262,11 @@ void StructDefinition::checkRecursion() const
 	}
 }
 
+TypePointer EnumDefinition::getType(ContractDefinition const*) const
+{
+	return make_shared<TypeType>(make_shared<EnumType>(*this));
+}
+
 TypePointer FunctionDefinition::getType(ContractDefinition const*) const
 {
 	return make_shared<FunctionType>(*this);
diff --git a/libsolidity/AST.h b/libsolidity/AST.h
index 4e79026e8..51d8031a3 100644
--- a/libsolidity/AST.h
+++ b/libsolidity/AST.h
@@ -209,6 +209,7 @@ public:
 					   ASTPointer<ASTString> const& _documentation,
 					   std::vector<ASTPointer<InheritanceSpecifier>> const& _baseContracts,
 					   std::vector<ASTPointer<StructDefinition>> const& _definedStructs,
+					   std::vector<ASTPointer<EnumDefinition>> const& _definedEnums,
 					   std::vector<ASTPointer<VariableDeclaration>> const& _stateVariables,
 					   std::vector<ASTPointer<FunctionDefinition>> const& _definedFunctions,
 					   std::vector<ASTPointer<ModifierDefinition>> const& _functionModifiers,
@@ -216,6 +217,7 @@ public:
 		Declaration(_location, _name), Documented(_documentation),
 		m_baseContracts(_baseContracts),
 		m_definedStructs(_definedStructs),
+		m_definedEnums(_definedEnums),
 		m_stateVariables(_stateVariables),
 		m_definedFunctions(_definedFunctions),
 		m_functionModifiers(_functionModifiers),
@@ -227,6 +229,7 @@ public:
 
 	std::vector<ASTPointer<InheritanceSpecifier>> const& getBaseContracts() const { return m_baseContracts; }
 	std::vector<ASTPointer<StructDefinition>> const& getDefinedStructs() const { return m_definedStructs; }
+	std::vector<ASTPointer<EnumDefinition>> const& getDefinedEnums() const { return m_definedEnums; }
 	std::vector<ASTPointer<VariableDeclaration>> const& getStateVariables() const { return m_stateVariables; }
 	std::vector<ASTPointer<ModifierDefinition>> const& getFunctionModifiers() const { return m_functionModifiers; }
 	std::vector<ASTPointer<FunctionDefinition>> const& getDefinedFunctions() const { return m_definedFunctions; }
@@ -260,6 +263,7 @@ private:
 
 	std::vector<ASTPointer<InheritanceSpecifier>> m_baseContracts;
 	std::vector<ASTPointer<StructDefinition>> m_definedStructs;
+	std::vector<ASTPointer<EnumDefinition>> m_definedEnums;
 	std::vector<ASTPointer<VariableDeclaration>> m_stateVariables;
 	std::vector<ASTPointer<FunctionDefinition>> m_definedFunctions;
 	std::vector<ASTPointer<ModifierDefinition>> m_functionModifiers;
@@ -315,6 +319,39 @@ private:
 	std::vector<ASTPointer<VariableDeclaration>> m_members;
 };
 
+class EnumDefinition: public Declaration
+{
+public:
+	EnumDefinition(Location const& _location,
+				   ASTPointer<ASTString> const& _name,
+				   std::vector<ASTPointer<EnumValue>> const& _members):
+		Declaration(_location, _name), m_members(_members) {}
+	virtual void accept(ASTVisitor& _visitor) override;
+	virtual void accept(ASTConstVisitor& _visitor) const override;
+
+	std::vector<ASTPointer<EnumValue>> const& getMembers() const { return m_members; }
+
+	virtual TypePointer getType(ContractDefinition const*) const override;
+
+private:
+	std::vector<ASTPointer<EnumValue>> m_members;
+};
+
+/**
+ * Declaration of an Enum Value
+ */
+class EnumValue: public Declaration
+{
+  public:
+	EnumValue(Location const& _location,
+			  ASTPointer<ASTString> const& _name):
+		Declaration(_location, _name) {}
+
+	virtual void accept(ASTVisitor& _visitor) override;
+	virtual void accept(ASTConstVisitor& _visitor) const override;
+	TypePointer getType(ContractDefinition const* = nullptr) const;
+};
+
 /**
  * Parameter list, used as function parameter list and return list.
  * None of the parameters is allowed to contain mappings (not even recursively
@@ -679,7 +716,7 @@ public:
 
 	Expression const& getCondition() const { return *m_condition; }
 	Statement const& getTrueStatement() const { return *m_trueBody; }
-	/// @returns the "else" part of the if statement or nullptr if there is no "else" part. 
+	/// @returns the "else" part of the if statement or nullptr if there is no "else" part.
 	Statement const* getFalseStatement() const { return m_falseBody.get(); }
 
 private:
diff --git a/libsolidity/ASTForward.h b/libsolidity/ASTForward.h
index 22015f26b..0b6817e45 100644
--- a/libsolidity/ASTForward.h
+++ b/libsolidity/ASTForward.h
@@ -40,6 +40,8 @@ class Declaration;
 class ContractDefinition;
 class InheritanceSpecifier;
 class StructDefinition;
+class EnumDefinition;
+class EnumValue;
 class ParameterList;
 class FunctionDefinition;
 class VariableDeclaration;
diff --git a/libsolidity/ASTPrinter.cpp b/libsolidity/ASTPrinter.cpp
index 949740e89..d380b0029 100644
--- a/libsolidity/ASTPrinter.cpp
+++ b/libsolidity/ASTPrinter.cpp
@@ -71,6 +71,18 @@ bool ASTPrinter::visit(StructDefinition const& _node)
 	return goDeeper();
 }
 
+bool ASTPrinter::visit(EnumDefinition const& _node)
+{
+	writeLine("EnumDefinition \"" + _node.getName() + "\"");
+	return goDeeper();
+}
+
+bool ASTPrinter::visit(EnumValue const& _node)
+{
+	writeLine("EnumValue \"" + _node.getName() + "\"");
+	return goDeeper();
+}
+
 bool ASTPrinter::visit(ParameterList const& _node)
 {
 	writeLine("ParameterList");
@@ -347,6 +359,16 @@ void ASTPrinter::endVisit(StructDefinition const&)
 	m_indentation--;
 }
 
+void ASTPrinter::endVisit(EnumDefinition const&)
+{
+	m_indentation--;
+}
+
+void ASTPrinter::endVisit(EnumValue const&)
+{
+	m_indentation--;
+}
+
 void ASTPrinter::endVisit(ParameterList const&)
 {
 	m_indentation--;
diff --git a/libsolidity/ASTPrinter.h b/libsolidity/ASTPrinter.h
index ebc163e31..d9072aacc 100644
--- a/libsolidity/ASTPrinter.h
+++ b/libsolidity/ASTPrinter.h
@@ -46,6 +46,8 @@ public:
 	bool visit(ContractDefinition const& _node) override;
 	bool visit(InheritanceSpecifier const& _node) override;
 	bool visit(StructDefinition const& _node) override;
+	bool visit(EnumDefinition const& _node) override;
+	bool visit(EnumValue const& _node) override;
 	bool visit(ParameterList const& _node) override;
 	bool visit(FunctionDefinition const& _node) override;
 	bool visit(VariableDeclaration const& _node) override;
@@ -85,6 +87,8 @@ public:
 	void endVisit(ContractDefinition const&) override;
 	void endVisit(InheritanceSpecifier const&) override;
 	void endVisit(StructDefinition const&) override;
+	void endVisit(EnumDefinition const&) override;
+	void endVisit(EnumValue const&) override;
 	void endVisit(ParameterList const&) override;
 	void endVisit(FunctionDefinition const&) override;
 	void endVisit(VariableDeclaration const&) override;
diff --git a/libsolidity/ASTVisitor.h b/libsolidity/ASTVisitor.h
index 294902778..a7fa6b1cf 100644
--- a/libsolidity/ASTVisitor.h
+++ b/libsolidity/ASTVisitor.h
@@ -47,6 +47,8 @@ public:
 	virtual bool visit(ContractDefinition&) { return true; }
 	virtual bool visit(InheritanceSpecifier&) { return true; }
 	virtual bool visit(StructDefinition&) { return true; }
+	virtual bool visit(EnumDefinition&) { return true; }
+	virtual bool visit(EnumValue&) { return true; }
 	virtual bool visit(ParameterList&) { return true; }
 	virtual bool visit(FunctionDefinition&) { return true; }
 	virtual bool visit(VariableDeclaration&) { return true; }
@@ -88,6 +90,8 @@ public:
 	virtual void endVisit(ContractDefinition&) { }
 	virtual void endVisit(InheritanceSpecifier&) { }
 	virtual void endVisit(StructDefinition&) { }
+	virtual void endVisit(EnumDefinition&) { }
+	virtual void endVisit(EnumValue&) { }
 	virtual void endVisit(ParameterList&) { }
 	virtual void endVisit(FunctionDefinition&) { }
 	virtual void endVisit(VariableDeclaration&) { }
@@ -133,6 +137,8 @@ public:
 	virtual bool visit(ContractDefinition const&) { return true; }
 	virtual bool visit(InheritanceSpecifier const&) { return true; }
 	virtual bool visit(StructDefinition const&) { return true; }
+	virtual bool visit(EnumDefinition const&) { return true; }
+	virtual bool visit(EnumValue const&) { return true; }
 	virtual bool visit(ParameterList const&) { return true; }
 	virtual bool visit(FunctionDefinition const&) { return true; }
 	virtual bool visit(VariableDeclaration const&) { return true; }
@@ -174,6 +180,8 @@ public:
 	virtual void endVisit(ContractDefinition const&) { }
 	virtual void endVisit(InheritanceSpecifier const&) { }
 	virtual void endVisit(StructDefinition const&) { }
+	virtual void endVisit(EnumDefinition const&) { }
+	virtual void endVisit(EnumValue const&) { }
 	virtual void endVisit(ParameterList const&) { }
 	virtual void endVisit(FunctionDefinition const&) { }
 	virtual void endVisit(VariableDeclaration const&) { }
diff --git a/libsolidity/AST_accept.h b/libsolidity/AST_accept.h
index 38108cd72..b71e103df 100644
--- a/libsolidity/AST_accept.h
+++ b/libsolidity/AST_accept.h
@@ -63,6 +63,7 @@ void ContractDefinition::accept(ASTVisitor& _visitor)
 	{
 		listAccept(m_baseContracts, _visitor);
 		listAccept(m_definedStructs, _visitor);
+		listAccept(m_definedEnums, _visitor);
 		listAccept(m_stateVariables, _visitor);
 		listAccept(m_events, _visitor);
 		listAccept(m_functionModifiers, _visitor);
@@ -77,6 +78,7 @@ void ContractDefinition::accept(ASTConstVisitor& _visitor) const
 	{
 		listAccept(m_baseContracts, _visitor);
 		listAccept(m_definedStructs, _visitor);
+		listAccept(m_definedEnums, _visitor);
 		listAccept(m_stateVariables, _visitor);
 		listAccept(m_events, _visitor);
 		listAccept(m_functionModifiers, _visitor);
@@ -105,6 +107,32 @@ void InheritanceSpecifier::accept(ASTConstVisitor& _visitor) const
 	_visitor.endVisit(*this);
 }
 
+void EnumDefinition::accept(ASTVisitor& _visitor)
+{
+	if (_visitor.visit(*this))
+		listAccept(m_members, _visitor);
+	_visitor.endVisit(*this);
+}
+
+void EnumDefinition::accept(ASTConstVisitor& _visitor) const
+{
+	if (_visitor.visit(*this))
+		listAccept(m_members, _visitor);
+	_visitor.endVisit(*this);
+}
+
+void EnumValue::accept(ASTVisitor& _visitor)
+{
+	_visitor.visit(*this);
+	_visitor.endVisit(*this);
+}
+
+void EnumValue::accept(ASTConstVisitor& _visitor) const
+{
+	_visitor.visit(*this);
+	_visitor.endVisit(*this);
+}
+
 void StructDefinition::accept(ASTVisitor& _visitor)
 {
 	if (_visitor.visit(*this))
diff --git a/libsolidity/CompilerStack.cpp b/libsolidity/CompilerStack.cpp
index 762edb521..ca9c75bcd 100644
--- a/libsolidity/CompilerStack.cpp
+++ b/libsolidity/CompilerStack.cpp
@@ -333,6 +333,11 @@ void CompilerStack::resolveImports()
 	swap(m_sourceOrder, sourceOrder);
 }
 
+std::string CompilerStack::defaultContractName() const
+{
+	return getContract("").contract->getName();
+}
+
 CompilerStack::Contract const& CompilerStack::getContract(string const& _contractName) const
 {
 	if (m_contracts.empty())
diff --git a/libsolidity/CompilerStack.h b/libsolidity/CompilerStack.h
index 439077f36..cb4770cd3 100644
--- a/libsolidity/CompilerStack.h
+++ b/libsolidity/CompilerStack.h
@@ -73,6 +73,7 @@ public:
 	void parse(std::string const& _sourceCode);
 	/// Returns a list of the contract names in the sources.
 	std::vector<std::string> getContractNames() const;
+	std::string defaultContractName() const;
 
 	/// Compiles the source units that were previously added and parsed.
 	void compile(bool _optimize = false);
diff --git a/libsolidity/ExpressionCompiler.cpp b/libsolidity/ExpressionCompiler.cpp
index 90f860a1e..0f0e94f21 100644
--- a/libsolidity/ExpressionCompiler.cpp
+++ b/libsolidity/ExpressionCompiler.cpp
@@ -489,13 +489,21 @@ void ExpressionCompiler::endVisit(MemberAccess const& _memberAccess)
 		m_currentLValue.retrieveValueIfLValueNotRequested(_memberAccess);
 		break;
 	}
+	case Type::Category::Enum:
+	{
+		EnumType const& type = dynamic_cast<EnumType const&>(*_memberAccess.getExpression().getType());
+		m_context << type.getMemberValue(_memberAccess.getMemberName());
+		break;
+	}
 	case Type::Category::TypeType:
 	{
 		TypeType const& type = dynamic_cast<TypeType const&>(*_memberAccess.getExpression().getType());
-		if (type.getMembers().getMemberType(member))
+		if (!type.getMembers().getMemberType(member))
+			BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Invalid member access to " + type.toString()));
+
+		if (auto contractType = dynamic_cast<ContractType const*>(type.getActualType().get()))
 		{
-			ContractDefinition const& contract = dynamic_cast<ContractType const&>(*type.getActualType())
-													.getContractDefinition();
+			ContractDefinition const& contract = contractType->getContractDefinition();
 			for (ASTPointer<FunctionDefinition> const& function: contract.getDefinedFunctions())
 				if (function->getName() == member)
 				{
@@ -503,7 +511,9 @@ void ExpressionCompiler::endVisit(MemberAccess const& _memberAccess)
 					return;
 				}
 		}
-		BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Invalid member access to " + type.toString()));
+		else if (auto enumType = dynamic_cast<EnumType const*>(type.getActualType().get()))
+			m_context << enumType->getMemberValue(_memberAccess.getMemberName());
+		break;
 	}
 	case Type::Category::ByteArray:
 	{
@@ -562,6 +572,10 @@ void ExpressionCompiler::endVisit(Identifier const& _identifier)
 	{
 		// no-op
 	}
+	else if (dynamic_cast<EnumDefinition const*>(declaration))
+	{
+		// no-op
+	}
 	else
 	{
 		BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Identifier type not expected in expression context."));
@@ -745,6 +759,9 @@ void ExpressionCompiler::appendTypeConversion(Type const& _typeOnStack, Type con
 			}
 		}
 	}
+	else if (stackTypeCategory == Type::Category::Enum)
+		solAssert(targetTypeCategory == Type::Category::Integer ||
+			targetTypeCategory == Type::Category::Enum, "");
 	else if (stackTypeCategory == Type::Category::Integer || stackTypeCategory == Type::Category::Contract ||
 			 stackTypeCategory == Type::Category::IntegerConstant)
 	{
@@ -758,6 +775,9 @@ void ExpressionCompiler::appendTypeConversion(Type const& _typeOnStack, Type con
 			solAssert(typeOnStack.getNumBits() == targetStringType.getNumBytes() * 8, "The size should be the same.");
 			m_context << (u256(1) << (256 - typeOnStack.getNumBits())) << eth::Instruction::MUL;
 		}
+		else if (targetTypeCategory == Type::Category::Enum)
+			// just clean
+			appendTypeConversion(_typeOnStack, *_typeOnStack.getRealType(), true);
 		else
 		{
 			solAssert(targetTypeCategory == Type::Category::Integer || targetTypeCategory == Type::Category::Contract, "");
diff --git a/libsolidity/InterfaceHandler.cpp b/libsolidity/InterfaceHandler.cpp
index 7ecde8029..99a7db96e 100644
--- a/libsolidity/InterfaceHandler.cpp
+++ b/libsolidity/InterfaceHandler.cpp
@@ -108,16 +108,7 @@ unique_ptr<string> InterfaceHandler::getABISolidityInterface(ContractDefinition
 			ret.pop_back();
 		ret += "{}";
 	}
-	for (auto const& it: _contractDef.getInterfaceEvents())
-	{
-		std::string params;
-		for (auto const& p: it->getParameters())
-			params += (params.empty() ? "(" : ",") + p->getType()->toString() + (p->isIndexed() ? " indexed " : " ") + p->getName();
-		if (!params.empty())
-			params += ")";
 
-		ret += "event " + it->getName() + params + ";";
-	}
 	return unique_ptr<string>(new string(ret + "}"));
 }
 
diff --git a/libsolidity/NameAndTypeResolver.cpp b/libsolidity/NameAndTypeResolver.cpp
index 7dc42bc62..dbe5693a8 100644
--- a/libsolidity/NameAndTypeResolver.cpp
+++ b/libsolidity/NameAndTypeResolver.cpp
@@ -58,6 +58,8 @@ void NameAndTypeResolver::resolveNamesAndTypes(ContractDefinition& _contract)
 
 	for (ASTPointer<StructDefinition> const& structDef: _contract.getDefinedStructs())
 		ReferencesResolver resolver(*structDef, *this, &_contract, nullptr);
+	for (ASTPointer<EnumDefinition> const& enumDef: _contract.getDefinedEnums())
+		ReferencesResolver resolver(*enumDef, *this, &_contract, nullptr);
 	for (ASTPointer<VariableDeclaration> const& variable: _contract.getStateVariables())
 		ReferencesResolver resolver(*variable, *this, &_contract, nullptr);
 	for (ASTPointer<EventDefinition> const& event: _contract.getEvents())
@@ -221,6 +223,23 @@ void DeclarationRegistrationHelper::endVisit(StructDefinition&)
 	closeCurrentScope();
 }
 
+bool DeclarationRegistrationHelper::visit(EnumDefinition& _enum)
+{
+	registerDeclaration(_enum, true);
+	return true;
+}
+
+void DeclarationRegistrationHelper::endVisit(EnumDefinition&)
+{
+	closeCurrentScope();
+}
+
+bool DeclarationRegistrationHelper::visit(EnumValue& _value)
+{
+	registerDeclaration(_value, false);
+	return true;
+}
+
 bool DeclarationRegistrationHelper::visit(FunctionDefinition& _function)
 {
 	registerDeclaration(_function, true);
diff --git a/libsolidity/NameAndTypeResolver.h b/libsolidity/NameAndTypeResolver.h
index 4b7ce6e7d..d9ac98ce5 100644
--- a/libsolidity/NameAndTypeResolver.h
+++ b/libsolidity/NameAndTypeResolver.h
@@ -98,6 +98,9 @@ private:
 	void endVisit(ContractDefinition& _contract) override;
 	bool visit(StructDefinition& _struct) override;
 	void endVisit(StructDefinition& _struct) override;
+	bool visit(EnumDefinition& _enum) override;
+	void endVisit(EnumDefinition& _enum) override;
+	bool visit(EnumValue& _value) override;
 	bool visit(FunctionDefinition& _function) override;
 	void endVisit(FunctionDefinition& _function) override;
 	bool visit(ModifierDefinition& _modifier) override;
diff --git a/libsolidity/Parser.cpp b/libsolidity/Parser.cpp
index f076df876..c96593f64 100644
--- a/libsolidity/Parser.cpp
+++ b/libsolidity/Parser.cpp
@@ -119,6 +119,7 @@ ASTPointer<ContractDefinition> Parser::parseContractDefinition()
 	ASTPointer<ASTString> name = expectIdentifierToken();
 	vector<ASTPointer<InheritanceSpecifier>> baseContracts;
 	vector<ASTPointer<StructDefinition>> structs;
+	vector<ASTPointer<EnumDefinition>> enums;
 	vector<ASTPointer<VariableDeclaration>> stateVariables;
 	vector<ASTPointer<FunctionDefinition>> functions;
 	vector<ASTPointer<ModifierDefinition>> modifiers;
@@ -140,6 +141,8 @@ ASTPointer<ContractDefinition> Parser::parseContractDefinition()
 			functions.push_back(parseFunctionDefinition(name.get()));
 		else if (currentToken == Token::Struct)
 			structs.push_back(parseStructDefinition());
+		else if (currentToken == Token::Enum)
+			enums.push_back(parseEnumDefinition());
 		else if (currentToken == Token::Identifier || currentToken == Token::Mapping ||
 				 Token::isElementaryTypeName(currentToken))
 		{
@@ -157,7 +160,7 @@ ASTPointer<ContractDefinition> Parser::parseContractDefinition()
 	}
 	nodeFactory.markEndPosition();
 	expectToken(Token::RBrace);
-	return nodeFactory.createNode<ContractDefinition>(name, docString, baseContracts, structs,
+	return nodeFactory.createNode<ContractDefinition>(name, docString, baseContracts, structs, enums,
 													  stateVariables, functions, modifiers, events);
 }
 
@@ -263,6 +266,36 @@ ASTPointer<StructDefinition> Parser::parseStructDefinition()
 	return nodeFactory.createNode<StructDefinition>(name, members);
 }
 
+ASTPointer<EnumValue> Parser::parseEnumValue()
+{
+	ASTNodeFactory nodeFactory(*this);
+	nodeFactory.markEndPosition();
+	return nodeFactory.createNode<EnumValue>(expectIdentifierToken());
+}
+
+ASTPointer<EnumDefinition> Parser::parseEnumDefinition()
+{
+	ASTNodeFactory nodeFactory(*this);
+	expectToken(Token::Enum);
+	ASTPointer<ASTString> name = expectIdentifierToken();
+	vector<ASTPointer<EnumValue>> members;
+	expectToken(Token::LBrace);
+
+	while (m_scanner->getCurrentToken() != Token::RBrace)
+	{
+		members.push_back(parseEnumValue());
+		if (m_scanner->getCurrentToken() == Token::RBrace)
+			break;
+		expectToken(Token::Comma);
+		if (m_scanner->getCurrentToken() != Token::Identifier)
+			BOOST_THROW_EXCEPTION(createParserError("Expected Identifier after ','"));
+	}
+
+	nodeFactory.markEndPosition();
+	expectToken(Token::RBrace);
+	return nodeFactory.createNode<EnumDefinition>(name, members);
+}
+
 ASTPointer<VariableDeclaration> Parser::parseVariableDeclaration(VarDeclParserOptions const& _options)
 {
 	ASTNodeFactory nodeFactory(*this);
diff --git a/libsolidity/Parser.h b/libsolidity/Parser.h
index 5816fec40..1bb4ea977 100644
--- a/libsolidity/Parser.h
+++ b/libsolidity/Parser.h
@@ -61,6 +61,8 @@ private:
 	Declaration::Visibility parseVisibilitySpecifier(Token::Value _token);
 	ASTPointer<FunctionDefinition> parseFunctionDefinition(ASTString const* _contractName);
 	ASTPointer<StructDefinition> parseStructDefinition();
+	ASTPointer<EnumDefinition> parseEnumDefinition();
+	ASTPointer<EnumValue> parseEnumValue();
 	ASTPointer<VariableDeclaration> parseVariableDeclaration(VarDeclParserOptions const& _options = VarDeclParserOptions());
 	ASTPointer<ModifierDefinition> parseModifierDefinition();
 	ASTPointer<EventDefinition> parseEventDefinition();
diff --git a/libsolidity/Token.h b/libsolidity/Token.h
index 5167c1a77..3e599a6ee 100644
--- a/libsolidity/Token.h
+++ b/libsolidity/Token.h
@@ -67,31 +67,31 @@ namespace solidity
 
 #define IGNORE_TOKEN(name, string, precedence)
 
-#define TOKEN_LIST(T, K)                                               \
-	/* End of source indicator. */                                     \
-	T(EOS, "EOS", 0)                                                   \
+#define TOKEN_LIST(T, K)												\
+	/* End of source indicator. */										\
+	T(EOS, "EOS", 0)													\
+																		\
+	/* Punctuators (ECMA-262, section 7.7, page 15). */				\
+	T(LParen, "(", 0)                                                   \
+	T(RParen, ")", 0)                                                   \
+	T(LBrack, "[", 0)                                                   \
+	T(RBrack, "]", 0)                                                   \
+	T(LBrace, "{", 0)                                                   \
+	T(RBrace, "}", 0)                                                   \
+	T(Colon, ":", 0)                                                    \
+	T(Semicolon, ";", 0)                                                \
+	T(Period, ".", 0)                                                   \
+	T(Conditional, "?", 3)                                              \
+	T(Arrow, "=>", 0)                                                   \
 	\
-	/* Punctuators (ECMA-262, section 7.7, page 15). */                \
-	T(LParen, "(", 0)                                                  \
-	T(RParen, ")", 0)                                                  \
-	T(LBrack, "[", 0)                                                  \
-	T(RBrack, "]", 0)                                                  \
-	T(LBrace, "{", 0)                                                  \
-	T(RBrace, "}", 0)                                                  \
-	T(Colon, ":", 0)                                                   \
-	T(Semicolon, ";", 0)                                               \
-	T(Period, ".", 0)                                                  \
-	T(Conditional, "?", 3)                                             \
-	T(Arrow, "=>", 0)                                                  \
-	\
-	/* Assignment operators. */                                        \
-	/* IsAssignmentOp() relies on this block of enum values being */   \
-	/* contiguous and sorted in the same order!*/                      \
-	T(Assign, "=", 2)                                                  \
+	/* Assignment operators. */										\
+	/* IsAssignmentOp() relies on this block of enum values being */	\
+	/* contiguous and sorted in the same order!*/						\
+	T(Assign, "=", 2)                                                   \
 	/* The following have to be in exactly the same order as the simple binary operators*/ \
-	T(AssignBitOr, "|=", 2)                                          \
-	T(AssignBitXor, "^=", 2)                                         \
-	T(AssignBitAnd, "&=", 2)                                         \
+	T(AssignBitOr, "|=", 2)                                           \
+	T(AssignBitXor, "^=", 2)                                          \
+	T(AssignBitAnd, "&=", 2)                                          \
 	T(AssignShl, "<<=", 2)                                            \
 	T(AssignSar, ">>=", 2)                                            \
 	T(AssignShr, ">>>=", 2)                                           \
@@ -107,9 +107,9 @@ namespace solidity
 	T(Comma, ",", 1)                                                   \
 	T(Or, "||", 4)                                                     \
 	T(And, "&&", 5)                                                    \
-	T(BitOr, "|", 8)                                                  \
-	T(BitXor, "^", 9)                                                 \
-	T(BitAnd, "&", 10)                                                \
+	T(BitOr, "|", 8)                                                   \
+	T(BitXor, "^", 9)                                                  \
+	T(BitAnd, "&", 10)                                                 \
 	T(SHL, "<<", 11)                                                   \
 	T(SAR, ">>", 11)                                                   \
 	T(SHR, ">>>", 11)                                                  \
@@ -123,19 +123,19 @@ namespace solidity
 	/* Compare operators sorted by precedence. */                      \
 	/* IsCompareOp() relies on this block of enum values */            \
 	/* being contiguous and sorted in the same order! */               \
-	T(Equal, "==", 6)                                                     \
-	T(NotEqual, "!=", 6)                                                     \
-	T(LessThan, "<", 7)                                                      \
-	T(GreaterThan, ">", 7)                                                      \
-	T(LessThanOrEqual, "<=", 7)                                                    \
-	T(GreaterThanOrEqual, ">=", 7)                                                    \
+	T(Equal, "==", 6)                                                  \
+	T(NotEqual, "!=", 6)                                               \
+	T(LessThan, "<", 7)                                                \
+	T(GreaterThan, ">", 7)                                             \
+	T(LessThanOrEqual, "<=", 7)                                        \
+	T(GreaterThanOrEqual, ">=", 7)                                     \
 	K(In, "in", 7)                                                     \
 	\
 	/* Unary operators. */                                             \
 	/* IsUnaryOp() relies on this block of enum values */              \
 	/* being contiguous and sorted in the same order! */               \
 	T(Not, "!", 0)                                                     \
-	T(BitNot, "~", 0)                                                 \
+	T(BitNot, "~", 0)                                                  \
 	T(Inc, "++", 0)                                                    \
 	T(Dec, "--", 0)                                                    \
 	K(Delete, "delete", 0)                                             \
@@ -168,7 +168,7 @@ namespace solidity
 	K(Switch, "switch", 0)                                             \
 	K(Var, "var", 0)                                                   \
 	K(While, "while", 0)                                               \
-	\
+	K(Enum, "enum", 0)                                                 \
 	\
 	/* Ether subdenominations */                                        \
 	K(SubWei, "wei", 0)                                                 \
@@ -316,15 +316,15 @@ namespace solidity
 	K(Text, "text", 0)                                                 \
 	K(Real, "real", 0)                                                 \
 	K(UReal, "ureal", 0)                                               \
-	T(TypesEnd, NULL, 0) /* used as type enum end marker */           \
+	T(TypesEnd, NULL, 0) /* used as type enum end marker */            \
 	\
 	/* Literals */                                                     \
-	K(NullLiteral, "null", 0)                                         \
-	K(TrueLiteral, "true", 0)                                         \
-	K(FalseLiteral, "false", 0)                                       \
+	K(NullLiteral, "null", 0)                                          \
+	K(TrueLiteral, "true", 0)                                          \
+	K(FalseLiteral, "false", 0)                                        \
 	T(Number, NULL, 0)                                                 \
-	T(StringLiteral, NULL, 0)                                         \
-	T(CommentLiteral, NULL, 0)                                        \
+	T(StringLiteral, NULL, 0)                                          \
+	T(CommentLiteral, NULL, 0)                                         \
 	\
 	/* Identifiers (not keywords or future reserved words). */         \
 	T(Identifier, NULL, 0)                                             \
diff --git a/libsolidity/Types.cpp b/libsolidity/Types.cpp
index 16514b148..b41834d84 100644
--- a/libsolidity/Types.cpp
+++ b/libsolidity/Types.cpp
@@ -74,6 +74,8 @@ TypePointer Type::fromUserDefinedTypeName(UserDefinedTypeName const& _typeName)
 	Declaration const* declaration = _typeName.getReferencedDeclaration();
 	if (StructDefinition const* structDef = dynamic_cast<StructDefinition const*>(declaration))
 		return make_shared<StructType>(*structDef);
+	else if (EnumDefinition const* enumDef = dynamic_cast<EnumDefinition const*>(declaration))
+		return make_shared<EnumType>(*enumDef);
 	else if (FunctionDefinition const* function = dynamic_cast<FunctionDefinition const*>(declaration))
 		return make_shared<FunctionType>(*function);
 	else if (ContractDefinition const* contract = dynamic_cast<ContractDefinition const*>(declaration))
@@ -154,7 +156,9 @@ bool IntegerType::isExplicitlyConvertibleTo(Type const& _convertTo) const
 		StaticStringType const& convertTo = dynamic_cast<StaticStringType const&>(_convertTo);
 		return isHash() && (m_bits == convertTo.getNumBytes() * 8);
 	}
-	return _convertTo.getCategory() == getCategory() || _convertTo.getCategory() == Category::Contract;
+	return _convertTo.getCategory() == getCategory() ||
+		   _convertTo.getCategory() == Category::Contract ||
+		   _convertTo.getCategory() == Category::Enum;
 }
 
 TypePointer IntegerType::unaryOperatorResult(Token::Value _operator) const
@@ -662,6 +666,41 @@ u256 StructType::getStorageOffsetOfMember(string const& _name) const
 	BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Storage offset of non-existing member requested."));
 }
 
+TypePointer EnumType::unaryOperatorResult(Token::Value _operator) const
+{
+	return _operator == Token::Delete ? make_shared<VoidType>() : TypePointer();
+}
+
+bool EnumType::operator==(Type const& _other) const
+{
+	if (_other.getCategory() != getCategory())
+		return false;
+	EnumType const& other = dynamic_cast<EnumType const&>(_other);
+	return other.m_enum == m_enum;
+}
+
+string EnumType::toString() const
+{
+	return string("enum ") + m_enum.getName();
+}
+
+bool EnumType::isExplicitlyConvertibleTo(Type const& _convertTo) const
+{
+	return _convertTo.getCategory() == getCategory() || _convertTo.getCategory() == Category::Integer;
+}
+
+unsigned int EnumType::getMemberValue(ASTString const& _member) const
+{
+	unsigned int index = 0;
+	for (ASTPointer<EnumValue> const& decl: m_enum.getMembers())
+	{
+		if (decl->getName() == _member)
+			return index;
+		++index;
+	}
+	BOOST_THROW_EXCEPTION(m_enum.createTypeError("Requested unknown enum value ." + _member));
+}
+
 FunctionType::FunctionType(FunctionDefinition const& _function, bool _isInternal):
 	m_location(_isInternal ? Location::Internal : Location::External),
 	m_isConstant(_function.isDeclaredConst()),
@@ -730,7 +769,7 @@ FunctionType::FunctionType(VariableDeclaration const& _varDecl):
 }
 
 FunctionType::FunctionType(const EventDefinition& _event):
-	m_location(Location::Event), m_declaration(&_event)
+	m_location(Location::Event), m_isConstant(true), m_declaration(&_event)
 {
 	TypePointers params;
 	vector<string> paramNames;
@@ -924,6 +963,13 @@ MemberList const& TypeType::getMembers() const
 					if (!f->isConstructor() && !f->getName().empty())
 						members[f->getName()] = make_shared<FunctionType>(*f);
 		}
+		else if (m_actualType->getCategory() == Category::Enum)
+		{
+			EnumDefinition const& enumDef = dynamic_cast<EnumType const&>(*m_actualType).getEnumDefinition();
+			auto enumType = make_shared<EnumType>(enumDef);
+			for (ASTPointer<EnumValue> const& enumValue: enumDef.getMembers())
+				members.insert(make_pair(enumValue->getName(), enumType));
+		}
 		m_members.reset(new MemberList(members));
 	}
 	return *m_members;
diff --git a/libsolidity/Types.h b/libsolidity/Types.h
index 5a0e2c429..3b4eee57f 100644
--- a/libsolidity/Types.h
+++ b/libsolidity/Types.h
@@ -76,10 +76,9 @@ class Type: private boost::noncopyable, public std::enable_shared_from_this<Type
 public:
 	enum class Category
 	{
-		Integer, IntegerConstant, Bool, Real, String,
-		ByteArray, Mapping,
-		Contract, Struct, Function,
-		Void, TypeType, Modifier, Magic
+		Integer, IntegerConstant, Bool, Real, ByteArray,
+		String, Contract, Struct, Function, Enum,
+		Mapping, Void, TypeType, Modifier, Magic
 	};
 
 	///@{
@@ -368,6 +367,32 @@ private:
 	mutable std::unique_ptr<MemberList> m_members;
 };
 
+/**
+ * The type of an enum instance, there is one distinct type per enum definition.
+ */
+class EnumType: public Type
+{
+public:
+	virtual Category getCategory() const override { return Category::Enum; }
+	explicit EnumType(EnumDefinition const& _enum): m_enum(_enum) {}
+	virtual TypePointer unaryOperatorResult(Token::Value _operator) const override;
+	virtual bool operator==(Type const& _other) const override;
+	virtual unsigned getSizeOnStack() const override { return 1; }
+	virtual std::string toString() const override;
+	virtual bool isValueType() const override { return true; }
+
+	virtual bool isExplicitlyConvertibleTo(Type const& _convertTo) const override;
+
+	EnumDefinition const& getEnumDefinition() const { return m_enum; }
+	/// @returns the value that the string has in the Enum
+	unsigned int getMemberValue(ASTString const& _member) const;
+
+private:
+	EnumDefinition const& m_enum;
+	/// List of member types, will be lazy-initialized because of recursive references.
+	mutable std::unique_ptr<MemberList> m_members;
+};
+
 /**
  * The type of a function, identified by its (return) parameter types.
  * @todo the return parameters should also have names, i.e. return parameters should be a struct
diff --git a/libsolidity/grammar.txt b/libsolidity/grammar.txt
index 1785b516c..5e6e65f85 100644
--- a/libsolidity/grammar.txt
+++ b/libsolidity/grammar.txt
@@ -1,7 +1,7 @@
 ContractDefinition = 'contract' Identifier
                      ( 'is' InheritanceSpecifier (',' InheritanceSpecifier )* )?
                      '{' ContractPart* '}'
-ContractPart = StateVariableDeclaration | StructDefinition | ModifierDefinition | FunctionDefinition
+ContractPart = StateVariableDeclaration | StructDefinition | ModifierDefinition | FunctionDefinition | EnumDefinition
 
 InheritanceSpecifier = Identifier ( '(' Expression ( ',' Expression )* ')' )?
 StructDefinition = 'struct' Identifier '{'
@@ -11,6 +11,9 @@ ModifierDefinition = 'modifier' Identifier ParameterList? Block
 FunctionDefinition = 'function' Identifier ParameterList
                      ( Identifier | 'constant' | 'public' | 'protected' | 'private' )*
                      ( 'returns' ParameterList )? Block
+
+EnumValue = Identifier
+EnumDefinition = 'enum' '{' EnumValue (',' EnumValue)* '}'
 ParameterList = '(' ( VariableDeclaration (',' VariableDeclaration)* )? ')'
 // semantic restriction: mappings and structs (recursively) containing mappings
 // are not allowed in argument lists
diff --git a/libweb3jsonrpc/CMakeLists.txt b/libweb3jsonrpc/CMakeLists.txt
index 98bbaa339..34df1633a 100644
--- a/libweb3jsonrpc/CMakeLists.txt
+++ b/libweb3jsonrpc/CMakeLists.txt
@@ -9,9 +9,11 @@ set(CMAKE_AUTOMOC OFF)
 
 aux_source_directory(. SRC_LIST)
 
+include_directories(..)
+include_directories(${JSONCPP_INCLUDE_DIRS})
+include_directories(${MHD_INCLUDE_DIRS})
 include_directories(${JSON_RPC_CPP_INCLUDE_DIRS})
 include_directories(${LEVELDB_INCLUDE_DIRS})
-include_directories(..)
 
 set(EXECUTABLE web3jsonrpc)
 
@@ -26,6 +28,7 @@ endif()
 target_link_libraries(${EXECUTABLE} ${LEVELDB_LIBRARIES})
 target_link_libraries(${EXECUTABLE} ${JSONCPP_LIBRARIES})
 target_link_libraries(${EXECUTABLE} ${JSON_RPC_CPP_SERVER_LIBRARIES})
+target_link_libraries(${EXECUTABLE} ${MHD_LIBRARIES})
 
 target_link_libraries(${EXECUTABLE} webthree)
 target_link_libraries(${EXECUTABLE} secp256k1)
diff --git a/libweb3jsonrpc/WebThreeStubServerBase.cpp b/libweb3jsonrpc/WebThreeStubServerBase.cpp
index 7ad29ed1b..27b8268da 100644
--- a/libweb3jsonrpc/WebThreeStubServerBase.cpp
+++ b/libweb3jsonrpc/WebThreeStubServerBase.cpp
@@ -264,7 +264,7 @@ Json::Value WebThreeStubServerBase::eth_blockByHash(std::string const& _hash)
 	return toJson(client()->blockInfo(jsToFixed<32>(_hash)));
 }
 
-Json::Value WebThreeStubServerBase::eth_blockByNumber(int const& _number)
+Json::Value WebThreeStubServerBase::eth_blockByNumber(int _number)
 {
 	return toJson(client()->blockInfo(client()->hashFromNumber(_number)));
 }
@@ -279,6 +279,8 @@ static TransactionSkeleton toTransaction(Json::Value const& _json)
 		ret.from = jsToAddress(_json["from"].asString());
 	if (_json["to"].isString())
 		ret.to = jsToAddress(_json["to"].asString());
+	else
+		ret.creation = true;
 	if (!_json["value"].empty())
 	{
 		if (_json["value"].isString())
@@ -342,7 +344,7 @@ std::string WebThreeStubServerBase::eth_call(Json::Value const& _json)
 	return ret;
 }
 
-Json::Value WebThreeStubServerBase::eth_changed(int const& _id)
+Json::Value WebThreeStubServerBase::eth_changed(int _id)
 {
 	auto entries = client()->checkWatch(_id);
 	if (entries.size())
@@ -381,7 +383,7 @@ std::string WebThreeStubServerBase::db_get(std::string const& _name, std::string
 	return toJS(dev::asBytes(ret));
 }
 
-Json::Value WebThreeStubServerBase::eth_filterLogs(int const& _id)
+Json::Value WebThreeStubServerBase::eth_filterLogs(int _id)
 {
 	return toJson(client()->logs(_id));
 }
@@ -563,13 +565,13 @@ bool WebThreeStubServerBase::eth_setCoinbase(std::string const& _address)
 	return true;
 }
 
-bool WebThreeStubServerBase::eth_setDefaultBlock(int const& _block)
+bool WebThreeStubServerBase::eth_setDefaultBlock(int _block)
 {
 	client()->setDefault(_block);
 	return true;
 }
 
-bool WebThreeStubServerBase::eth_setListening(bool const& _listening)
+bool WebThreeStubServerBase::eth_setListening(bool _listening)
 {
 	if (_listening)
 		network()->startNetwork();
@@ -578,7 +580,7 @@ bool WebThreeStubServerBase::eth_setListening(bool const& _listening)
 	return true;
 }
 
-bool WebThreeStubServerBase::eth_setMining(bool const& _mining)
+bool WebThreeStubServerBase::eth_setMining(bool _mining)
 {
 	if (_mining)
 		client()->startMining();
@@ -587,7 +589,7 @@ bool WebThreeStubServerBase::eth_setMining(bool const& _mining)
 	return true;
 }
 
-Json::Value WebThreeStubServerBase::shh_changed(int const& _id)
+Json::Value WebThreeStubServerBase::shh_changed(int _id)
 {
 	Json::Value ret(Json::arrayValue);
 	auto pub = m_shhWatches[_id];
@@ -619,7 +621,7 @@ int WebThreeStubServerBase::shh_newFilter(Json::Value const& _json)
 	return ret;
 }
 
-bool WebThreeStubServerBase::shh_uninstallFilter(int const& _id)
+bool WebThreeStubServerBase::shh_uninstallFilter(int _id)
 {
 	face()->uninstallWatch(_id);
 	return true;
@@ -671,27 +673,27 @@ bool WebThreeStubServerBase::authenticate(TransactionSkeleton const& _t)
 	return true;
 }
 
-Json::Value WebThreeStubServerBase::eth_transactionByHash(std::string const& _hash, int const& _i)
+Json::Value WebThreeStubServerBase::eth_transactionByHash(std::string const& _hash, int _i)
 {
 	return toJson(client()->transaction(jsToFixed<32>(_hash), _i));
 }
 
-Json::Value WebThreeStubServerBase::eth_transactionByNumber(int const& _number, int const& _i)
+Json::Value WebThreeStubServerBase::eth_transactionByNumber(int _number, int _i)
 {
 	return toJson(client()->transaction(client()->hashFromNumber(_number), _i));
 }
 
-Json::Value WebThreeStubServerBase::eth_uncleByHash(std::string const& _hash, int const& _i)
+Json::Value WebThreeStubServerBase::eth_uncleByHash(std::string const& _hash, int _i)
 {
 	return toJson(client()->uncle(jsToFixed<32>(_hash), _i));
 }
 
-Json::Value WebThreeStubServerBase::eth_uncleByNumber(int const& _number, int const& _i)
+Json::Value WebThreeStubServerBase::eth_uncleByNumber(int _number, int _i)
 {
 	return toJson(client()->uncle(client()->hashFromNumber(_number), _i));
 }
 
-bool WebThreeStubServerBase::eth_uninstallFilter(int const& _id)
+bool WebThreeStubServerBase::eth_uninstallFilter(int _id)
 {
 	client()->uninstallWatch(_id);
 	return true;
diff --git a/libweb3jsonrpc/WebThreeStubServerBase.h b/libweb3jsonrpc/WebThreeStubServerBase.h
index 1190ce407..005ac4130 100644
--- a/libweb3jsonrpc/WebThreeStubServerBase.h
+++ b/libweb3jsonrpc/WebThreeStubServerBase.h
@@ -69,16 +69,16 @@ public:
 	virtual Json::Value eth_accounts();
 	virtual std::string eth_balanceAt(std::string const& _address);
 	virtual Json::Value eth_blockByHash(std::string const& _hash);
-	virtual Json::Value eth_blockByNumber(int const& _number);
+	virtual Json::Value eth_blockByNumber(int _number);
 	virtual std::string eth_call(Json::Value const& _json);
-	virtual Json::Value eth_changed(int const& _id);
+	virtual Json::Value eth_changed(int _id);
 	virtual std::string eth_codeAt(std::string const& _address);
 	virtual std::string eth_coinbase();
 	virtual Json::Value eth_compilers();
 	virtual double eth_countAt(std::string const& _address);
 	virtual int eth_defaultBlock();
 	virtual std::string eth_gasPrice();
-	virtual Json::Value eth_filterLogs(int const& _id);
+	virtual Json::Value eth_filterLogs(int _id);
 	virtual bool eth_flush();
 	virtual Json::Value eth_logs(Json::Value const& _json);
 	virtual bool eth_listening();
@@ -88,20 +88,20 @@ public:
 	virtual int eth_number();
 	virtual int eth_peerCount();
 	virtual bool eth_setCoinbase(std::string const& _address);
-	virtual bool eth_setDefaultBlock(int const& _block);
-	virtual bool eth_setListening(bool const& _listening);
+	virtual bool eth_setDefaultBlock(int _block);
+	virtual bool eth_setListening(bool _listening);
 	virtual std::string eth_lll(std::string const& _s);
 	virtual std::string eth_serpent(std::string const& _s);
-	virtual bool eth_setMining(bool const& _mining);
+	virtual bool eth_setMining(bool _mining);
 	virtual std::string eth_solidity(std::string const& _code);
 	virtual std::string eth_stateAt(std::string const& _address, std::string const& _storage);
 	virtual Json::Value eth_storageAt(std::string const& _address);
 	virtual std::string eth_transact(Json::Value const& _json);
-	virtual Json::Value eth_transactionByHash(std::string const& _hash, int const& _i);
-	virtual Json::Value eth_transactionByNumber(int const& _number, int const& _i);
-	virtual Json::Value eth_uncleByHash(std::string const& _hash, int const& _i);
-	virtual Json::Value eth_uncleByNumber(int const& _number, int const& _i);
-	virtual bool eth_uninstallFilter(int const& _id);
+	virtual Json::Value eth_transactionByHash(std::string const& _hash, int _i);
+	virtual Json::Value eth_transactionByNumber(int  _number, int _i);
+	virtual Json::Value eth_uncleByHash(std::string const& _hash, int _i);
+	virtual Json::Value eth_uncleByNumber(int _number, int _i);
+	virtual bool eth_uninstallFilter(int _id);
 
 	virtual Json::Value eth_getWork();
 	virtual bool eth_submitWork(std::string const& _nonce);
@@ -112,13 +112,13 @@ public:
 	virtual bool db_putString(std::string const& _name, std::string const& _key, std::string const& _value);
 
 	virtual std::string shh_addToGroup(std::string const& _group, std::string const& _who);
-	virtual Json::Value shh_changed(int const& _id);
+	virtual Json::Value shh_changed(int _id);
 	virtual bool shh_haveIdentity(std::string const& _id);
 	virtual int shh_newFilter(Json::Value const& _json);
 	virtual std::string shh_newGroup(std::string const& _id, std::string const& _who);
 	virtual std::string shh_newIdentity();
 	virtual bool shh_post(Json::Value const& _json);
-	virtual bool shh_uninstallFilter(int const& _id);
+	virtual bool shh_uninstallFilter(int _id);
 
 	void setAccounts(std::vector<dev::KeyPair> const& _accounts);
 	void setIdentities(std::vector<dev::KeyPair> const& _ids);
diff --git a/libweb3jsonrpc/abstractwebthreestubserver.h b/libweb3jsonrpc/abstractwebthreestubserver.h
index dda8def08..5bade41f6 100644
--- a/libweb3jsonrpc/abstractwebthreestubserver.h
+++ b/libweb3jsonrpc/abstractwebthreestubserver.h
@@ -10,59 +10,59 @@
 class AbstractWebThreeStubServer : public jsonrpc::AbstractServer<AbstractWebThreeStubServer>
 {
     public:
-        AbstractWebThreeStubServer(jsonrpc::AbstractServerConnector &conn) : jsonrpc::AbstractServer<AbstractWebThreeStubServer>(conn)
-        {
-            this->bindAndAddMethod(new jsonrpc::Procedure("web3_sha3", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::web3_sha3I);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_coinbase", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING,  NULL), &AbstractWebThreeStubServer::eth_coinbaseI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_setCoinbase", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_setCoinbaseI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_listening", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN,  NULL), &AbstractWebThreeStubServer::eth_listeningI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_setListening", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_BOOLEAN, NULL), &AbstractWebThreeStubServer::eth_setListeningI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_mining", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN,  NULL), &AbstractWebThreeStubServer::eth_miningI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_setMining", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_BOOLEAN, NULL), &AbstractWebThreeStubServer::eth_setMiningI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_gasPrice", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING,  NULL), &AbstractWebThreeStubServer::eth_gasPriceI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_accounts", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_ARRAY,  NULL), &AbstractWebThreeStubServer::eth_accountsI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_peerCount", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_INTEGER,  NULL), &AbstractWebThreeStubServer::eth_peerCountI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_defaultBlock", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_INTEGER,  NULL), &AbstractWebThreeStubServer::eth_defaultBlockI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_setDefaultBlock", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_setDefaultBlockI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_number", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_INTEGER,  NULL), &AbstractWebThreeStubServer::eth_numberI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_balanceAt", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_balanceAtI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_stateAt", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_stateAtI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_storageAt", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_OBJECT, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_storageAtI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_countAt", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_REAL, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_countAtI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_codeAt", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_codeAtI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_transact", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_OBJECT, NULL), &AbstractWebThreeStubServer::eth_transactI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_call", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_OBJECT, NULL), &AbstractWebThreeStubServer::eth_callI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_flush", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN,  NULL), &AbstractWebThreeStubServer::eth_flushI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_blockByHash", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_OBJECT, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_blockByHashI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_blockByNumber", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_OBJECT, "param1",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_blockByNumberI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_transactionByHash", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_OBJECT, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_transactionByHashI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_transactionByNumber", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_OBJECT, "param1",jsonrpc::JSON_INTEGER,"param2",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_transactionByNumberI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_uncleByHash", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_OBJECT, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_uncleByHashI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_uncleByNumber", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_OBJECT, "param1",jsonrpc::JSON_INTEGER,"param2",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_uncleByNumberI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_compilers", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_ARRAY,  NULL), &AbstractWebThreeStubServer::eth_compilersI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_lll", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_lllI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_solidity", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_solidityI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_serpent", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_serpentI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_newFilter", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_INTEGER, "param1",jsonrpc::JSON_OBJECT, NULL), &AbstractWebThreeStubServer::eth_newFilterI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_newFilterString", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_INTEGER, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_newFilterStringI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_uninstallFilter", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_uninstallFilterI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_changed", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_ARRAY, "param1",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_changedI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_filterLogs", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_ARRAY, "param1",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_filterLogsI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_logs", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_ARRAY, "param1",jsonrpc::JSON_OBJECT, NULL), &AbstractWebThreeStubServer::eth_logsI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_getWork", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_ARRAY,  NULL), &AbstractWebThreeStubServer::eth_getWorkI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("eth_submitWork", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_submitWorkI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("db_put", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_STRING,"param3",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::db_putI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("db_get", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::db_getI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("db_putString", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_STRING,"param3",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::db_putStringI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("db_getString", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::db_getStringI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("shh_post", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_OBJECT, NULL), &AbstractWebThreeStubServer::shh_postI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("shh_newIdentity", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING,  NULL), &AbstractWebThreeStubServer::shh_newIdentityI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("shh_haveIdentity", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::shh_haveIdentityI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("shh_newGroup", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::shh_newGroupI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("shh_addToGroup", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::shh_addToGroupI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("shh_newFilter", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_INTEGER, "param1",jsonrpc::JSON_OBJECT, NULL), &AbstractWebThreeStubServer::shh_newFilterI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("shh_uninstallFilter", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::shh_uninstallFilterI);
-            this->bindAndAddMethod(new jsonrpc::Procedure("shh_changed", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_ARRAY, "param1",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::shh_changedI);
+        AbstractWebThreeStubServer(jsonrpc::AbstractServerConnector &conn, jsonrpc::serverVersion_t type = jsonrpc::JSONRPC_SERVER_V2) : jsonrpc::AbstractServer<AbstractWebThreeStubServer>(conn, type)
+        {
+            this->bindAndAddMethod(jsonrpc::Procedure("web3_sha3", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::web3_sha3I);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_coinbase", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING,  NULL), &AbstractWebThreeStubServer::eth_coinbaseI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_setCoinbase", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_setCoinbaseI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_listening", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN,  NULL), &AbstractWebThreeStubServer::eth_listeningI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_setListening", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_BOOLEAN, NULL), &AbstractWebThreeStubServer::eth_setListeningI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_mining", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN,  NULL), &AbstractWebThreeStubServer::eth_miningI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_setMining", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_BOOLEAN, NULL), &AbstractWebThreeStubServer::eth_setMiningI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_gasPrice", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING,  NULL), &AbstractWebThreeStubServer::eth_gasPriceI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_accounts", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_ARRAY,  NULL), &AbstractWebThreeStubServer::eth_accountsI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_peerCount", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_INTEGER,  NULL), &AbstractWebThreeStubServer::eth_peerCountI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_defaultBlock", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_INTEGER,  NULL), &AbstractWebThreeStubServer::eth_defaultBlockI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_setDefaultBlock", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_setDefaultBlockI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_number", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_INTEGER,  NULL), &AbstractWebThreeStubServer::eth_numberI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_balanceAt", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_balanceAtI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_stateAt", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_stateAtI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_storageAt", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_OBJECT, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_storageAtI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_countAt", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_REAL, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_countAtI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_codeAt", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_codeAtI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_transact", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_OBJECT, NULL), &AbstractWebThreeStubServer::eth_transactI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_call", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_OBJECT, NULL), &AbstractWebThreeStubServer::eth_callI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_flush", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN,  NULL), &AbstractWebThreeStubServer::eth_flushI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_blockByHash", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_OBJECT, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_blockByHashI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_blockByNumber", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_OBJECT, "param1",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_blockByNumberI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_transactionByHash", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_OBJECT, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_transactionByHashI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_transactionByNumber", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_OBJECT, "param1",jsonrpc::JSON_INTEGER,"param2",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_transactionByNumberI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_uncleByHash", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_OBJECT, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_uncleByHashI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_uncleByNumber", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_OBJECT, "param1",jsonrpc::JSON_INTEGER,"param2",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_uncleByNumberI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_compilers", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_ARRAY,  NULL), &AbstractWebThreeStubServer::eth_compilersI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_lll", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_lllI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_solidity", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_solidityI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_serpent", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_serpentI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_newFilter", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_INTEGER, "param1",jsonrpc::JSON_OBJECT, NULL), &AbstractWebThreeStubServer::eth_newFilterI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_newFilterString", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_INTEGER, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_newFilterStringI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_uninstallFilter", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_uninstallFilterI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_changed", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_ARRAY, "param1",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_changedI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_filterLogs", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_ARRAY, "param1",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::eth_filterLogsI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_logs", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_ARRAY, "param1",jsonrpc::JSON_OBJECT, NULL), &AbstractWebThreeStubServer::eth_logsI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_getWork", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_ARRAY,  NULL), &AbstractWebThreeStubServer::eth_getWorkI);
+            this->bindAndAddMethod(jsonrpc::Procedure("eth_submitWork", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::eth_submitWorkI);
+            this->bindAndAddMethod(jsonrpc::Procedure("db_put", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_STRING,"param3",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::db_putI);
+            this->bindAndAddMethod(jsonrpc::Procedure("db_get", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::db_getI);
+            this->bindAndAddMethod(jsonrpc::Procedure("db_putString", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_STRING,"param3",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::db_putStringI);
+            this->bindAndAddMethod(jsonrpc::Procedure("db_getString", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::db_getStringI);
+            this->bindAndAddMethod(jsonrpc::Procedure("shh_post", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_OBJECT, NULL), &AbstractWebThreeStubServer::shh_postI);
+            this->bindAndAddMethod(jsonrpc::Procedure("shh_newIdentity", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING,  NULL), &AbstractWebThreeStubServer::shh_newIdentityI);
+            this->bindAndAddMethod(jsonrpc::Procedure("shh_haveIdentity", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::shh_haveIdentityI);
+            this->bindAndAddMethod(jsonrpc::Procedure("shh_newGroup", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::shh_newGroupI);
+            this->bindAndAddMethod(jsonrpc::Procedure("shh_addToGroup", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_STRING, "param1",jsonrpc::JSON_STRING,"param2",jsonrpc::JSON_STRING, NULL), &AbstractWebThreeStubServer::shh_addToGroupI);
+            this->bindAndAddMethod(jsonrpc::Procedure("shh_newFilter", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_INTEGER, "param1",jsonrpc::JSON_OBJECT, NULL), &AbstractWebThreeStubServer::shh_newFilterI);
+            this->bindAndAddMethod(jsonrpc::Procedure("shh_uninstallFilter", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_BOOLEAN, "param1",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::shh_uninstallFilterI);
+            this->bindAndAddMethod(jsonrpc::Procedure("shh_changed", jsonrpc::PARAMS_BY_POSITION, jsonrpc::JSON_ARRAY, "param1",jsonrpc::JSON_INTEGER, NULL), &AbstractWebThreeStubServer::shh_changedI);
         }
 
         inline virtual void web3_sha3I(const Json::Value &request, Json::Value &response)
@@ -71,6 +71,7 @@ class AbstractWebThreeStubServer : public jsonrpc::AbstractServer<AbstractWebThr
         }
         inline virtual void eth_coinbaseI(const Json::Value &request, Json::Value &response)
         {
+            (void)request;
             response = this->eth_coinbase();
         }
         inline virtual void eth_setCoinbaseI(const Json::Value &request, Json::Value &response)
@@ -79,6 +80,7 @@ class AbstractWebThreeStubServer : public jsonrpc::AbstractServer<AbstractWebThr
         }
         inline virtual void eth_listeningI(const Json::Value &request, Json::Value &response)
         {
+            (void)request;
             response = this->eth_listening();
         }
         inline virtual void eth_setListeningI(const Json::Value &request, Json::Value &response)
@@ -87,6 +89,7 @@ class AbstractWebThreeStubServer : public jsonrpc::AbstractServer<AbstractWebThr
         }
         inline virtual void eth_miningI(const Json::Value &request, Json::Value &response)
         {
+            (void)request;
             response = this->eth_mining();
         }
         inline virtual void eth_setMiningI(const Json::Value &request, Json::Value &response)
@@ -95,18 +98,22 @@ class AbstractWebThreeStubServer : public jsonrpc::AbstractServer<AbstractWebThr
         }
         inline virtual void eth_gasPriceI(const Json::Value &request, Json::Value &response)
         {
+            (void)request;
             response = this->eth_gasPrice();
         }
         inline virtual void eth_accountsI(const Json::Value &request, Json::Value &response)
         {
+            (void)request;
             response = this->eth_accounts();
         }
         inline virtual void eth_peerCountI(const Json::Value &request, Json::Value &response)
         {
+            (void)request;
             response = this->eth_peerCount();
         }
         inline virtual void eth_defaultBlockI(const Json::Value &request, Json::Value &response)
         {
+            (void)request;
             response = this->eth_defaultBlock();
         }
         inline virtual void eth_setDefaultBlockI(const Json::Value &request, Json::Value &response)
@@ -115,6 +122,7 @@ class AbstractWebThreeStubServer : public jsonrpc::AbstractServer<AbstractWebThr
         }
         inline virtual void eth_numberI(const Json::Value &request, Json::Value &response)
         {
+            (void)request;
             response = this->eth_number();
         }
         inline virtual void eth_balanceAtI(const Json::Value &request, Json::Value &response)
@@ -147,6 +155,7 @@ class AbstractWebThreeStubServer : public jsonrpc::AbstractServer<AbstractWebThr
         }
         inline virtual void eth_flushI(const Json::Value &request, Json::Value &response)
         {
+            (void)request;
             response = this->eth_flush();
         }
         inline virtual void eth_blockByHashI(const Json::Value &request, Json::Value &response)
@@ -175,6 +184,7 @@ class AbstractWebThreeStubServer : public jsonrpc::AbstractServer<AbstractWebThr
         }
         inline virtual void eth_compilersI(const Json::Value &request, Json::Value &response)
         {
+            (void)request;
             response = this->eth_compilers();
         }
         inline virtual void eth_lllI(const Json::Value &request, Json::Value &response)
@@ -215,6 +225,7 @@ class AbstractWebThreeStubServer : public jsonrpc::AbstractServer<AbstractWebThr
         }
         inline virtual void eth_getWorkI(const Json::Value &request, Json::Value &response)
         {
+            (void)request;
             response = this->eth_getWork();
         }
         inline virtual void eth_submitWorkI(const Json::Value &request, Json::Value &response)
@@ -243,6 +254,7 @@ class AbstractWebThreeStubServer : public jsonrpc::AbstractServer<AbstractWebThr
         }
         inline virtual void shh_newIdentityI(const Json::Value &request, Json::Value &response)
         {
+            (void)request;
             response = this->shh_newIdentity();
         }
         inline virtual void shh_haveIdentityI(const Json::Value &request, Json::Value &response)
@@ -273,14 +285,14 @@ class AbstractWebThreeStubServer : public jsonrpc::AbstractServer<AbstractWebThr
         virtual std::string eth_coinbase() = 0;
         virtual bool eth_setCoinbase(const std::string& param1) = 0;
         virtual bool eth_listening() = 0;
-        virtual bool eth_setListening(const bool& param1) = 0;
+        virtual bool eth_setListening(bool param1) = 0;
         virtual bool eth_mining() = 0;
-        virtual bool eth_setMining(const bool& param1) = 0;
+        virtual bool eth_setMining(bool param1) = 0;
         virtual std::string eth_gasPrice() = 0;
         virtual Json::Value eth_accounts() = 0;
         virtual int eth_peerCount() = 0;
         virtual int eth_defaultBlock() = 0;
-        virtual bool eth_setDefaultBlock(const int& param1) = 0;
+        virtual bool eth_setDefaultBlock(int param1) = 0;
         virtual int eth_number() = 0;
         virtual std::string eth_balanceAt(const std::string& param1) = 0;
         virtual std::string eth_stateAt(const std::string& param1, const std::string& param2) = 0;
@@ -291,20 +303,20 @@ class AbstractWebThreeStubServer : public jsonrpc::AbstractServer<AbstractWebThr
         virtual std::string eth_call(const Json::Value& param1) = 0;
         virtual bool eth_flush() = 0;
         virtual Json::Value eth_blockByHash(const std::string& param1) = 0;
-        virtual Json::Value eth_blockByNumber(const int& param1) = 0;
-        virtual Json::Value eth_transactionByHash(const std::string& param1, const int& param2) = 0;
-        virtual Json::Value eth_transactionByNumber(const int& param1, const int& param2) = 0;
-        virtual Json::Value eth_uncleByHash(const std::string& param1, const int& param2) = 0;
-        virtual Json::Value eth_uncleByNumber(const int& param1, const int& param2) = 0;
+        virtual Json::Value eth_blockByNumber(int param1) = 0;
+        virtual Json::Value eth_transactionByHash(const std::string& param1, int param2) = 0;
+        virtual Json::Value eth_transactionByNumber(int param1, int param2) = 0;
+        virtual Json::Value eth_uncleByHash(const std::string& param1, int param2) = 0;
+        virtual Json::Value eth_uncleByNumber(int param1, int param2) = 0;
         virtual Json::Value eth_compilers() = 0;
         virtual std::string eth_lll(const std::string& param1) = 0;
         virtual std::string eth_solidity(const std::string& param1) = 0;
         virtual std::string eth_serpent(const std::string& param1) = 0;
         virtual int eth_newFilter(const Json::Value& param1) = 0;
         virtual int eth_newFilterString(const std::string& param1) = 0;
-        virtual bool eth_uninstallFilter(const int& param1) = 0;
-        virtual Json::Value eth_changed(const int& param1) = 0;
-        virtual Json::Value eth_filterLogs(const int& param1) = 0;
+        virtual bool eth_uninstallFilter(int param1) = 0;
+        virtual Json::Value eth_changed(int param1) = 0;
+        virtual Json::Value eth_filterLogs(int param1) = 0;
         virtual Json::Value eth_logs(const Json::Value& param1) = 0;
         virtual Json::Value eth_getWork() = 0;
         virtual bool eth_submitWork(const std::string& param1) = 0;
@@ -318,8 +330,8 @@ class AbstractWebThreeStubServer : public jsonrpc::AbstractServer<AbstractWebThr
         virtual std::string shh_newGroup(const std::string& param1, const std::string& param2) = 0;
         virtual std::string shh_addToGroup(const std::string& param1, const std::string& param2) = 0;
         virtual int shh_newFilter(const Json::Value& param1) = 0;
-        virtual bool shh_uninstallFilter(const int& param1) = 0;
-        virtual Json::Value shh_changed(const int& param1) = 0;
+        virtual bool shh_uninstallFilter(int param1) = 0;
+        virtual Json::Value shh_changed(int param1) = 0;
 };
 
-#endif //JSONRPC_CPP_ABSTRACTWEBTHREESTUBSERVER_H_
+#endif //JSONRPC_CPP_STUB_ABSTRACTWEBTHREESTUBSERVER_H_
diff --git a/mix/Web3Server.cpp b/mix/Web3Server.cpp
index edac252fe..11cb56b1d 100644
--- a/mix/Web3Server.cpp
+++ b/mix/Web3Server.cpp
@@ -55,7 +55,7 @@ void Web3Server::put(std::string const& _name, std::string const& _key, std::str
 	m_db[k] = _value;
 }
 
-Json::Value Web3Server::eth_changed(int const& _id)
+Json::Value Web3Server::eth_changed(int _id)
 {
 	return WebThreeStubServerBase::eth_changed(_id);
 }
diff --git a/mix/Web3Server.h b/mix/Web3Server.h
index b344720e7..01a187ff7 100644
--- a/mix/Web3Server.h
+++ b/mix/Web3Server.h
@@ -44,7 +44,7 @@ signals:
 	void newTransaction();
 
 protected:
-	virtual Json::Value eth_changed(int const& _id) override;
+	virtual Json::Value eth_changed(int _id) override;
 	virtual std::string eth_transact(Json::Value const& _json) override;
 	virtual std::string eth_call(Json::Value const& _json) override;
 
diff --git a/mix/main.cpp b/mix/main.cpp
index d0a19cfb5..798520e39 100644
--- a/mix/main.cpp
+++ b/mix/main.cpp
@@ -36,6 +36,10 @@ int main(int _argc, char* _argv[])
 	//https://bugs.launchpad.net/ubuntu/+source/appmenu-qt5/+bug/1323853
 	putenv((char*)"QT_QPA_PLATFORMTHEME=");
 	putenv((char*)"QSG_RENDER_LOOP=threaded");
+#endif
+#if (defined(_WIN32) || defined(_WIN64))
+	if (!getenv("OPENSSL_CONF"))
+		putenv((char*)"OPENSSL_CONF=c:\\");
 #endif
 	try
 	{
diff --git a/mix/qml/Debugger.qml b/mix/qml/Debugger.qml
index 1dd05574f..098cc77d1 100644
--- a/mix/qml/Debugger.qml
+++ b/mix/qml/Debugger.qml
@@ -131,7 +131,14 @@ Rectangle {
 			Layout.fillWidth: true
 			Layout.minimumHeight: 60
 			height: 250
+			anchors.top: parent.top
+			anchors.left: parent.left
+			anchors.right: parent.right
+			anchors.leftMargin: machineStates.sideMargin
+			anchors.rightMargin: machineStates.sideMargin
+			anchors.topMargin: machineStates.sideMargin
 		}
+
 		ScrollView
 		{
 			property int sideMargin: 10
diff --git a/mix/qml/DefaultLabel.qml b/mix/qml/DefaultLabel.qml
index a1304e673..d8ef1faff 100644
--- a/mix/qml/DefaultLabel.qml
+++ b/mix/qml/DefaultLabel.qml
@@ -4,12 +4,6 @@ import "."
 
 Label {
 	text: text
-	font.family: regularFont.name
-	font.pointSize: Style.generic.size.titlePointSize
-	SourceSansProLight
-	{
-		id: regularFont
-	}
 }
 
 
diff --git a/mix/qml/DefaultTextField.qml b/mix/qml/DefaultTextField.qml
index 6705273db..de306fa5e 100644
--- a/mix/qml/DefaultTextField.qml
+++ b/mix/qml/DefaultTextField.qml
@@ -3,11 +3,4 @@ import QtQuick.Controls 1.1
 
 TextField {
 	id: titleField
-	focus: true
-	font.family: regularFont.name
-
-	SourceSansProRegular
-	{
-		id: regularFont;
-	}
 }
diff --git a/mix/qml/Ether.qml b/mix/qml/Ether.qml
index be41fced9..1a0f7ffe6 100644
--- a/mix/qml/Ether.qml
+++ b/mix/qml/Ether.qml
@@ -49,10 +49,6 @@ RowLayout {
 		id: etherValueEdit;
 	}
 
-	SourceSansProBold {
-		id: regularFont;
-	}
-
 	ComboBox
 	{
 		id: units
@@ -87,15 +83,11 @@ RowLayout {
 			ListElement { text: "Kwei"; }
 			ListElement { text: "wei"; }
 		}
-		style: ComboBoxStyle {
-			font: regularFont.name
-		}
 	}
 
 	Text
 	{
 		visible: displayFormattedValue
 		id: formattedValue
-		font.family: regularFont.name
 	}
 }
diff --git a/mix/qml/StateDialog.qml b/mix/qml/StateDialog.qml
index eeda2ae22..abb045497 100644
--- a/mix/qml/StateDialog.qml
+++ b/mix/qml/StateDialog.qml
@@ -12,7 +12,7 @@ Window {
 	id: modalStateDialog
 	modality: Qt.ApplicationModal
 
-	width: 450
+	width: 520
 	height: 480
 	title: qsTr("Edit State")
 	visible: false
diff --git a/mix/qml/TransactionDialog.qml b/mix/qml/TransactionDialog.qml
index a38886354..c71bd4155 100644
--- a/mix/qml/TransactionDialog.qml
+++ b/mix/qml/TransactionDialog.qml
@@ -10,7 +10,7 @@ import "."
 Window {
 	id: modalTransactionDialog
 	modality: Qt.ApplicationModal
-	width: 450
+	width: 520
 	height: (paramsModel.count > 0 ? 500 : 300)
 	visible: false
 	color: StateDialogStyle.generic.backgroundColor
@@ -174,11 +174,6 @@ Window {
 		anchors.fill: parent
 		anchors.margins: 10
 
-		SourceSansProLight
-		{
-			id: lightFont
-		}
-
 		ColumnLayout {
 			id: dialogContent
 			anchors.top: parent.top
@@ -204,9 +199,6 @@ Window {
 					onCurrentIndexChanged: {
 						loadParameters();
 					}
-					style: ComboBoxStyle {
-						font: lightFont.name
-					}
 				}
 			}
 
diff --git a/mix/qml/WebPreview.qml b/mix/qml/WebPreview.qml
index 88b992b54..5d4d0e617 100644
--- a/mix/qml/WebPreview.qml
+++ b/mix/qml/WebPreview.qml
@@ -162,11 +162,6 @@ Item {
 		spacing: 0
 		Rectangle
 		{
-			SourceSansProLight
-			{
-				id: regularFont
-			}
-
 			anchors.leftMargin: 4
 			color: WebPreviewStyle.general.headerBackgroundColor
 			Layout.preferredWidth: parent.width
@@ -188,9 +183,7 @@ Item {
 					currentIndex: -1
 					onCurrentIndexChanged: changePage()
 					anchors.verticalCenter: parent.verticalCenter
-					style: ComboBoxStyle {
-						font: regularFont.name
-					}
+					height: 21
 				}
 
 				Action {
@@ -205,12 +198,13 @@ Item {
 					iconSource: "qrc:/qml/img/available_updates.png"
 					action: buttonReloadAction
 					anchors.verticalCenter: parent.verticalCenter
-					width: 26
-					height: 26
+					width: 21
+					height: 21
 				}
 				CheckBox {
 					id: autoReloadOnSave
 					checked: true
+					height: 21
 					anchors.verticalCenter: parent.verticalCenter
 					style: CheckBoxStyle {
 						label: DefaultLabel {
diff --git a/test/SolidityEndToEndTest.cpp b/test/SolidityEndToEndTest.cpp
index 259123db6..0325c4c6a 100644
--- a/test/SolidityEndToEndTest.cpp
+++ b/test/SolidityEndToEndTest.cpp
@@ -2499,6 +2499,41 @@ BOOST_AUTO_TEST_CASE(struct_copy_via_local)
 	BOOST_CHECK(callContractFunction("test()") == encodeArgs(true));
 }
 
+BOOST_AUTO_TEST_CASE(using_enums)
+{
+	char const* sourceCode = R"(
+			contract test {
+				enum ActionChoices { GoLeft, GoRight, GoStraight, Sit }
+				function test()
+				{
+					choices = ActionChoices.GoStraight;
+				}
+				function getChoice() returns (uint d)
+				{
+					d = uint256(choices);
+				}
+				ActionChoices choices;
+			}
+	)";
+	compileAndRun(sourceCode);
+	BOOST_CHECK(callContractFunction("getChoice()") == encodeArgs(2));
+}
+
+BOOST_AUTO_TEST_CASE(constructing_enums_from_ints)
+{
+	char const* sourceCode = R"(
+			contract c {
+				enum Truth { False, True }
+				function test() returns (uint)
+				{
+					return uint(Truth(uint8(0x701)));
+				}
+			}
+	)";
+	compileAndRun(sourceCode);
+	BOOST_CHECK(callContractFunction("test()") == encodeArgs(1));
+}
+
 BOOST_AUTO_TEST_SUITE_END()
 
 }
diff --git a/test/SolidityInterface.cpp b/test/SolidityInterface.cpp
index 78de2356a..a73c118bb 100644
--- a/test/SolidityInterface.cpp
+++ b/test/SolidityInterface.cpp
@@ -111,24 +111,6 @@ BOOST_AUTO_TEST_CASE(exclude_fallback_function)
 	BOOST_CHECK_EQUAL(getSourcePart(contract), "contract test{}");
 }
 
-BOOST_AUTO_TEST_CASE(event)
-{
-	ContractDefinition const& contract = checkInterface(
-			"contract test { event Event; }");
-	BOOST_REQUIRE_EQUAL(1, contract.getEvents().size());
-	BOOST_CHECK_EQUAL(getSourcePart(*contract.getEvents().front()),
-					  "event Event;");
-}
-
-BOOST_AUTO_TEST_CASE(event_arguments)
-{
-	ContractDefinition const& contract = checkInterface(
-			"contract test { event Event(uint a, uint indexed b); }");
-	BOOST_REQUIRE_EQUAL(1, contract.getEvents().size());
-	BOOST_CHECK_EQUAL(getSourcePart(*contract.getEvents().front()),
-					  "event Event(uint256 a,uint256 indexed b);");
-}
-
 BOOST_AUTO_TEST_CASE(events)
 {
 	char const* sourceCode = "contract test {\n"
@@ -137,10 +119,8 @@ BOOST_AUTO_TEST_CASE(events)
 	"  event e2(); \n"
 	"}\n";
 	ContractDefinition const& contract = checkInterface(sourceCode);
-	set<string> expectation({"event e1(uint256 b,address indexed c);", "event e2;"});
-	BOOST_REQUIRE_EQUAL(2, contract.getEvents().size());
-	BOOST_CHECK(expectation == set<string>({getSourcePart(*contract.getEvents().at(0)),
-											getSourcePart(*contract.getEvents().at(1))}));
+	// events should not appear in the Solidity Interface
+	BOOST_REQUIRE_EQUAL(0, contract.getEvents().size());
 }
 
 BOOST_AUTO_TEST_CASE(inheritance)
@@ -155,12 +135,8 @@ BOOST_AUTO_TEST_CASE(inheritance)
 	"		event derivedEvent(uint indexed evtArgDerived); \n"
 	"	}";
 	ContractDefinition const& contract = checkInterface(sourceCode);
-	set<string> expectedEvents({"event derivedEvent(uint256 indexed evtArgDerived);",
-								"event baseEvent(string32 indexed evtArgBase);"});
 	set<string> expectedFunctions({"function baseFunction(uint256 p)returns(uint256 i){}",
 								   "function derivedFunction(string32 p)returns(string32 i){}"});
-	BOOST_CHECK(expectedEvents == set<string>({getSourcePart(*contract.getEvents().at(0)),
-											   getSourcePart(*contract.getEvents().at(1))}));
 	BOOST_REQUIRE_EQUAL(2, contract.getDefinedFunctions().size());
 	BOOST_CHECK(expectedFunctions == set<string>({getSourcePart(*contract.getDefinedFunctions().at(0)),
 												  getSourcePart(*contract.getDefinedFunctions().at(1))}));
diff --git a/test/SolidityNameAndTypeResolution.cpp b/test/SolidityNameAndTypeResolution.cpp
index 3ead6f1c5..d6e4ed516 100644
--- a/test/SolidityNameAndTypeResolution.cpp
+++ b/test/SolidityNameAndTypeResolution.cpp
@@ -992,6 +992,97 @@ BOOST_AUTO_TEST_CASE(exp_operator_exponent_too_big)
 	BOOST_CHECK_THROW(parseTextAndResolveNames(sourceCode), TypeError);
 }
 
+BOOST_AUTO_TEST_CASE(enum_member_access)
+{
+	char const* text = R"(
+			contract test {
+				enum ActionChoices { GoLeft, GoRight, GoStraight, Sit }
+				function test()
+				{
+					choices = ActionChoices.GoStraight;
+				}
+				ActionChoices choices;
+			}
+	)";
+	BOOST_CHECK_NO_THROW(parseTextAndResolveNamesWithChecks(text));
+}
+
+BOOST_AUTO_TEST_CASE(enum_invalid_member_access)
+{
+	char const* text = R"(
+			contract test {
+				enum ActionChoices { GoLeft, GoRight, GoStraight, Sit }
+				function test()
+				{
+					choices = ActionChoices.RunAroundWavingYourHands;
+				}
+				ActionChoices choices;
+			}
+	)";
+	BOOST_CHECK_THROW(parseTextAndResolveNames(text), TypeError);
+}
+
+BOOST_AUTO_TEST_CASE(enum_explicit_conversion_is_okay)
+{
+	char const* text = R"(
+			contract test {
+				enum ActionChoices { GoLeft, GoRight, GoStraight, Sit }
+				function test()
+				{
+					a = uint256(ActionChoices.GoStraight);
+					b = uint64(ActionChoices.Sit);
+				}
+				uint256 a;
+				uint64 b;
+			}
+	)";
+	BOOST_CHECK_NO_THROW(parseTextAndResolveNamesWithChecks(text));
+}
+
+BOOST_AUTO_TEST_CASE(int_to_enum_explicit_conversion_is_okay)
+{
+	char const* text = R"(
+			contract test {
+				enum ActionChoices { GoLeft, GoRight, GoStraight, Sit }
+				function test()
+				{
+					a = 2;
+					b = ActionChoices(a);
+				}
+				uint256 a;
+				ActionChoices b;
+			}
+	)";
+	BOOST_CHECK_NO_THROW(parseTextAndResolveNamesWithChecks(text));
+}
+
+BOOST_AUTO_TEST_CASE(enum_implicit_conversion_is_not_okay)
+{
+	char const* text = R"(
+			contract test {
+				enum ActionChoices { GoLeft, GoRight, GoStraight, Sit }
+				function test()
+				{
+					a = ActionChoices.GoStraight;
+					b = ActionChoices.Sit;
+				}
+				uint256 a;
+				uint64 b;
+			}
+	)";
+	BOOST_CHECK_THROW(parseTextAndResolveNames(text), TypeError);
+}
+
+BOOST_AUTO_TEST_CASE(enum_duplicate_values)
+{
+	char const* text = R"(
+			contract test {
+				enum ActionChoices { GoLeft, GoRight, GoLeft, Sit }
+			}
+	)";
+	BOOST_CHECK_THROW(parseTextAndResolveNames(text), DeclarationError);
+}
+
 BOOST_AUTO_TEST_SUITE_END()
 
 }
diff --git a/test/SolidityParser.cpp b/test/SolidityParser.cpp
index 84f36170f..af82f612a 100644
--- a/test/SolidityParser.cpp
+++ b/test/SolidityParser.cpp
@@ -703,6 +703,38 @@ BOOST_AUTO_TEST_CASE(literal_constants_with_ether_subdenominations_in_expression
 	BOOST_CHECK_NO_THROW(parseTextExplainError(text));
 }
 
+BOOST_AUTO_TEST_CASE(enum_valid_declaration)
+{
+	char const* text = R"(
+		contract c {
+			enum validEnum { Value1, Value2, Value3, Value4 }
+			function c ()
+			{
+				a = foo.Value3;
+			}
+			uint256 a;
+		})";
+	BOOST_CHECK_NO_THROW(parseTextExplainError(text));
+}
+
+BOOST_AUTO_TEST_CASE(empty_enum_declaration)
+{
+	char const* text = R"(
+		contract c {
+			enum foo { }
+		})";
+	BOOST_CHECK_NO_THROW(parseTextExplainError(text));
+}
+
+BOOST_AUTO_TEST_CASE(malformed_enum_declaration)
+{
+	char const* text = R"(
+		contract c {
+			enum foo { WARNING,}
+		})";
+	BOOST_CHECK_THROW(parseText(text), ParserError);
+}
+
 BOOST_AUTO_TEST_SUITE_END()
 
 }
diff --git a/test/webthreestubclient.h b/test/webthreestubclient.h
index 1836f6506..02f5b5e40 100644
--- a/test/webthreestubclient.h
+++ b/test/webthreestubclient.h
@@ -10,7 +10,7 @@
 class WebThreeStubClient : public jsonrpc::Client
 {
     public:
-        WebThreeStubClient(jsonrpc::IClientConnector &conn) : jsonrpc::Client(conn) {}
+        WebThreeStubClient(jsonrpc::IClientConnector &conn, jsonrpc::clientVersion_t type = jsonrpc::JSONRPC_CLIENT_V2) : jsonrpc::Client(conn, type) {}
 
         std::string web3_sha3(const std::string& param1) throw (jsonrpc::JsonRpcException)
         {
@@ -52,7 +52,7 @@ class WebThreeStubClient : public jsonrpc::Client
             else
                 throw jsonrpc::JsonRpcException(jsonrpc::Errors::ERROR_CLIENT_INVALID_RESPONSE, result.toStyledString());
         }
-        bool eth_setListening(const bool& param1) throw (jsonrpc::JsonRpcException)
+        bool eth_setListening(bool param1) throw (jsonrpc::JsonRpcException)
         {
             Json::Value p;
             p.append(param1);
@@ -72,7 +72,7 @@ class WebThreeStubClient : public jsonrpc::Client
             else
                 throw jsonrpc::JsonRpcException(jsonrpc::Errors::ERROR_CLIENT_INVALID_RESPONSE, result.toStyledString());
         }
-        bool eth_setMining(const bool& param1) throw (jsonrpc::JsonRpcException)
+        bool eth_setMining(bool param1) throw (jsonrpc::JsonRpcException)
         {
             Json::Value p;
             p.append(param1);
@@ -122,7 +122,7 @@ class WebThreeStubClient : public jsonrpc::Client
             else
                 throw jsonrpc::JsonRpcException(jsonrpc::Errors::ERROR_CLIENT_INVALID_RESPONSE, result.toStyledString());
         }
-        bool eth_setDefaultBlock(const int& param1) throw (jsonrpc::JsonRpcException)
+        bool eth_setDefaultBlock(int param1) throw (jsonrpc::JsonRpcException)
         {
             Json::Value p;
             p.append(param1);
@@ -233,7 +233,7 @@ class WebThreeStubClient : public jsonrpc::Client
             else
                 throw jsonrpc::JsonRpcException(jsonrpc::Errors::ERROR_CLIENT_INVALID_RESPONSE, result.toStyledString());
         }
-        Json::Value eth_blockByNumber(const int& param1) throw (jsonrpc::JsonRpcException)
+        Json::Value eth_blockByNumber(int param1) throw (jsonrpc::JsonRpcException)
         {
             Json::Value p;
             p.append(param1);
@@ -243,7 +243,7 @@ class WebThreeStubClient : public jsonrpc::Client
             else
                 throw jsonrpc::JsonRpcException(jsonrpc::Errors::ERROR_CLIENT_INVALID_RESPONSE, result.toStyledString());
         }
-        Json::Value eth_transactionByHash(const std::string& param1, const int& param2) throw (jsonrpc::JsonRpcException)
+        Json::Value eth_transactionByHash(const std::string& param1, int param2) throw (jsonrpc::JsonRpcException)
         {
             Json::Value p;
             p.append(param1);
@@ -254,7 +254,7 @@ class WebThreeStubClient : public jsonrpc::Client
             else
                 throw jsonrpc::JsonRpcException(jsonrpc::Errors::ERROR_CLIENT_INVALID_RESPONSE, result.toStyledString());
         }
-        Json::Value eth_transactionByNumber(const int& param1, const int& param2) throw (jsonrpc::JsonRpcException)
+        Json::Value eth_transactionByNumber(int param1, int param2) throw (jsonrpc::JsonRpcException)
         {
             Json::Value p;
             p.append(param1);
@@ -265,7 +265,7 @@ class WebThreeStubClient : public jsonrpc::Client
             else
                 throw jsonrpc::JsonRpcException(jsonrpc::Errors::ERROR_CLIENT_INVALID_RESPONSE, result.toStyledString());
         }
-        Json::Value eth_uncleByHash(const std::string& param1, const int& param2) throw (jsonrpc::JsonRpcException)
+        Json::Value eth_uncleByHash(const std::string& param1, int param2) throw (jsonrpc::JsonRpcException)
         {
             Json::Value p;
             p.append(param1);
@@ -276,7 +276,7 @@ class WebThreeStubClient : public jsonrpc::Client
             else
                 throw jsonrpc::JsonRpcException(jsonrpc::Errors::ERROR_CLIENT_INVALID_RESPONSE, result.toStyledString());
         }
-        Json::Value eth_uncleByNumber(const int& param1, const int& param2) throw (jsonrpc::JsonRpcException)
+        Json::Value eth_uncleByNumber(int param1, int param2) throw (jsonrpc::JsonRpcException)
         {
             Json::Value p;
             p.append(param1);
@@ -347,7 +347,7 @@ class WebThreeStubClient : public jsonrpc::Client
             else
                 throw jsonrpc::JsonRpcException(jsonrpc::Errors::ERROR_CLIENT_INVALID_RESPONSE, result.toStyledString());
         }
-        bool eth_uninstallFilter(const int& param1) throw (jsonrpc::JsonRpcException)
+        bool eth_uninstallFilter(int param1) throw (jsonrpc::JsonRpcException)
         {
             Json::Value p;
             p.append(param1);
@@ -357,7 +357,7 @@ class WebThreeStubClient : public jsonrpc::Client
             else
                 throw jsonrpc::JsonRpcException(jsonrpc::Errors::ERROR_CLIENT_INVALID_RESPONSE, result.toStyledString());
         }
-        Json::Value eth_changed(const int& param1) throw (jsonrpc::JsonRpcException)
+        Json::Value eth_changed(int param1) throw (jsonrpc::JsonRpcException)
         {
             Json::Value p;
             p.append(param1);
@@ -367,7 +367,7 @@ class WebThreeStubClient : public jsonrpc::Client
             else
                 throw jsonrpc::JsonRpcException(jsonrpc::Errors::ERROR_CLIENT_INVALID_RESPONSE, result.toStyledString());
         }
-        Json::Value eth_filterLogs(const int& param1) throw (jsonrpc::JsonRpcException)
+        Json::Value eth_filterLogs(int param1) throw (jsonrpc::JsonRpcException)
         {
             Json::Value p;
             p.append(param1);
@@ -515,7 +515,7 @@ class WebThreeStubClient : public jsonrpc::Client
             else
                 throw jsonrpc::JsonRpcException(jsonrpc::Errors::ERROR_CLIENT_INVALID_RESPONSE, result.toStyledString());
         }
-        bool shh_uninstallFilter(const int& param1) throw (jsonrpc::JsonRpcException)
+        bool shh_uninstallFilter(int param1) throw (jsonrpc::JsonRpcException)
         {
             Json::Value p;
             p.append(param1);
@@ -525,7 +525,7 @@ class WebThreeStubClient : public jsonrpc::Client
             else
                 throw jsonrpc::JsonRpcException(jsonrpc::Errors::ERROR_CLIENT_INVALID_RESPONSE, result.toStyledString());
         }
-        Json::Value shh_changed(const int& param1) throw (jsonrpc::JsonRpcException)
+        Json::Value shh_changed(int param1) throw (jsonrpc::JsonRpcException)
         {
             Json::Value p;
             p.append(param1);
@@ -537,4 +537,4 @@ class WebThreeStubClient : public jsonrpc::Client
         }
 };
 
-#endif //JSONRPC_CPP_WEBTHREESTUBCLIENT_H_
+#endif //JSONRPC_CPP_STUB_WEBTHREESTUBCLIENT_H_
diff --git a/third/CMakeLists.txt b/third/CMakeLists.txt
index 71f1e70f2..3f4981e29 100644
--- a/third/CMakeLists.txt
+++ b/third/CMakeLists.txt
@@ -32,8 +32,11 @@ eth_add_executable(${EXECUTABLE}
 add_dependencies(${EXECUTABLE} BuildInfo.h)
 
 target_link_libraries(${EXECUTABLE} Qt5::Core)
+target_link_libraries(${EXECUTABLE} Qt5::Widgets)
+target_link_libraries(${EXECUTABLE} Qt5::WebKit)
+target_link_libraries(${EXECUTABLE} Qt5::WebKitWidgets)
+target_link_libraries(${EXECUTABLE} webthree)
 target_link_libraries(${EXECUTABLE} webthree)
-target_link_libraries(${EXECUTABLE} qwebthree)
 target_link_libraries(${EXECUTABLE} ethereum)
 target_link_libraries(${EXECUTABLE} evm)
 target_link_libraries(${EXECUTABLE} ethcore) 
diff --git a/third/MainWin.cpp b/third/MainWin.cpp
index f1b7bc826..5fb5074bc 100644
--- a/third/MainWin.cpp
+++ b/third/MainWin.cpp
@@ -40,6 +40,7 @@
 #include <libethereum/EthereumHost.h>
 #include <libwebthree/WebThree.h>
 #include <libweb3jsonrpc/WebThreeStubServer.h>
+#include <jsonrpccpp/server/connectors/httpserver.h>
 #include "BuildInfo.h"
 #include "MainWin.h"
 #include "ui_Main.h"
@@ -118,20 +119,24 @@ Main::Main(QWidget *parent) :
 	m_web3.reset(new WebThreeDirect("Third", getDataDir() + "/Third", false, {"eth", "shh"}, NetworkPreferences(), networkConfig));
 	m_web3->connect(Host::pocHost());
 
-	m_server = unique_ptr<WebThreeStubServer>(new WebThreeStubServer(m_qwebConnector, *web3(), keysAsVector(m_myKeys)));
+	m_httpConnector.reset(new jsonrpc::HttpServer(8080));
+	m_server.reset(new WebThreeStubServer(*m_httpConnector, *web3(), keysAsVector(m_myKeys)));
+//	m_server = unique_ptr<WebThreeStubServer>(new WebThreeStubServer(m_httpConnector, *web3(), keysAsVector(m_myKeys)));
 	m_server->setIdentities(keysAsVector(owned()));
 	m_server->StartListening();
 	
 	connect(ui->webView, &QWebView::loadStarted, [this]()
 	{
-		// NOTE: no need to delete as QETH_INSTALL_JS_NAMESPACE adopts it.
-		m_qweb = new QWebThree(this);
-		auto qweb = m_qweb;
-		m_qwebConnector.setQWeb(qweb);
-
 		QWebFrame* f = ui->webView->page()->mainFrame();
 		f->disconnect(SIGNAL(javaScriptWindowObjectCleared()));
-		connect(f, &QWebFrame::javaScriptWindowObjectCleared, QETH_INSTALL_JS_NAMESPACE(f, this, qweb));
+		connect(f, &QWebFrame::javaScriptWindowObjectCleared, [f, this]()
+		{
+			f->disconnect();
+			f->addToJavaScriptWindowObject("env", this, QWebFrame::QtOwnership);
+			f->evaluateJavaScript(contentsOfQResource(":/js/bignumber.min.js"));
+			f->evaluateJavaScript(contentsOfQResource(":/js/webthree.js"));
+			f->evaluateJavaScript(contentsOfQResource(":/js/setup.js"));
+		});
 	});
 	
 	connect(ui->webView, &QWebView::loadFinished, [=]()
@@ -163,7 +168,6 @@ Main::~Main()
 {
 	// Must do this here since otherwise m_ethereum'll be deleted (and therefore clearWatches() called by the destructor)
 	// *after* the client is dead.
-	m_qweb->clientDieing();
 	writeSettings();
 }
 
diff --git a/third/MainWin.h b/third/MainWin.h
index 924fc057e..513cfe96e 100644
--- a/third/MainWin.h
+++ b/third/MainWin.h
@@ -30,7 +30,6 @@
 #include <libdevcore/RLP.h>
 #include <libethcore/CommonEth.h>
 #include <libethereum/State.h>
-#include <libqwebthree/QWebThree.h>
 
 namespace Ui {
 class Main;
@@ -47,6 +46,10 @@ class WhisperHost;
 }
 }
 
+namespace jsonrpc {
+class HttpServer;
+}
+
 class QQuickView;
 class WebThreeStubServer;
 
@@ -136,7 +139,6 @@ private:
 
 	QNetworkAccessManager m_webCtrl;
 
+	std::unique_ptr<jsonrpc::HttpServer> m_httpConnector;
 	std::unique_ptr<WebThreeStubServer> m_server;
-	QWebThreeConnector m_qwebConnector;
-	QWebThree* m_qweb = nullptr;
 };