diff --git a/alethzero/MainWin.cpp b/alethzero/MainWin.cpp
index 8d24dc36c..2a0a056a5 100644
--- a/alethzero/MainWin.cpp
+++ b/alethzero/MainWin.cpp
@@ -33,7 +33,7 @@
 #include <libserpent/funcs.h>
 #include <libserpent/util.h>
 #include <libdevcrypto/FileSystem.h>
-#include <libdevcore/CommonJS.h>
+#include <libethcore/CommonJS.h>
 #include <liblll/Compiler.h>
 #include <liblll/CodeFragment.h>
 #include <libsolidity/Scanner.h>
diff --git a/alethzero/OurWebThreeStubServer.h b/alethzero/OurWebThreeStubServer.h
index 5223d79bd..16981f9e1 100644
--- a/alethzero/OurWebThreeStubServer.h
+++ b/alethzero/OurWebThreeStubServer.h
@@ -20,7 +20,7 @@
  */
 
 #include <QtCore/QObject>
-#include <libdevcore/CommonJS.h>
+#include <libethcore/CommonJS.h>
 #include <libdevcrypto/Common.h>
 #include <libweb3jsonrpc/WebThreeStubServer.h>
 
@@ -35,7 +35,7 @@ public:
 						  std::vector<dev::KeyPair> const& _accounts, Main* main);
 
 	virtual std::string shh_newIdentity() override;
-	virtual bool authenticate(dev::TransactionSkeleton const& _t);
+	virtual bool authenticate(dev::eth::TransactionSkeleton const& _t);
 
 signals:
 	void onNewId(QString _s);
diff --git a/libdevcore/CommonJS.cpp b/libethcore/CommonJS.cpp
similarity index 99%
rename from libdevcore/CommonJS.cpp
rename to libethcore/CommonJS.cpp
index 980cb9081..3ed4e2796 100644
--- a/libdevcore/CommonJS.cpp
+++ b/libethcore/CommonJS.cpp
@@ -72,6 +72,31 @@ bytes unpadLeft(bytes _b)
 	return _b;
 }
 
+std::string fromRaw(h256 _n, unsigned* _inc)
+{
+	if (_n)
+	{
+		std::string s((char const*)_n.data(), 32);
+		auto l = s.find_first_of('\0');
+		if (!l)
+			return "";
+		if (l != std::string::npos)
+		{
+			auto p = s.find_first_not_of('\0', l);
+			if (!(p == std::string::npos || (_inc && p == 31)))
+				return "";
+			if (_inc)
+				*_inc = (byte)s[31];
+			s.resize(l);
+		}
+		for (auto i: s)
+			if (i < 32)
+				return "";
+		return s;
+	}
+	return "";
+}
+
 std::string prettyU256(u256 _n)
 {
 	unsigned inc = 0;
@@ -98,31 +123,6 @@ std::string prettyU256(u256 _n)
 	return s.str();
 }
 
-std::string fromRaw(h256 _n, unsigned* _inc)
-{
-	if (_n)
-	{
-		std::string s((char const*)_n.data(), 32);
-		auto l = s.find_first_of('\0');
-		if (!l)
-			return "";
-		if (l != std::string::npos)
-		{
-			auto p = s.find_first_not_of('\0', l);
-			if (!(p == std::string::npos || (_inc && p == 31)))
-				return "";
-			if (_inc)
-				*_inc = (byte)s[31];
-			s.resize(l);
-		}
-		for (auto i: s)
-			if (i < 32)
-				return "";
-		return s;
-	}
-	return "";
-}
-
 Address fromString(std::string const& _sn)
 {
 	if (_sn.size() == 40)
@@ -132,3 +132,4 @@ Address fromString(std::string const& _sn)
 }
 
 }
+
diff --git a/libdevcore/CommonJS.h b/libethcore/CommonJS.h
similarity index 94%
rename from libdevcore/CommonJS.h
rename to libethcore/CommonJS.h
index 59e6c1d34..ccc3b3103 100644
--- a/libdevcore/CommonJS.h
+++ b/libethcore/CommonJS.h
@@ -24,9 +24,11 @@
 #pragma once
 
 #include <string>
-#include <libethereum/Interface.h>
-#include "Common.h"
-#include "CommonData.h"
+#include <libdevcore/Common.h>
+#include <libdevcore/FixedHash.h>
+#include <libdevcore/CommonData.h>
+#include <libdevcore/CommonIO.h>
+#include "CommonEth.h"
 
 namespace dev
 {
@@ -94,16 +96,8 @@ template <unsigned N> boost::multiprecision::number<boost::multiprecision::cpp_i
 		return 0;			// FAIL
 }
 
-inline Address jsToAddress(std::string const& _s) { return jsToFixed<sizeof(dev::Address)>(_s); }
-inline Public jsToPublic(std::string const& _s) { return jsToFixed<sizeof(dev::Public)>(_s); }
-inline Secret jsToSecret(std::string const& _s) { return jsToFixed<sizeof(dev::Secret)>(_s); }
 inline u256 jsToU256(std::string const& _s) { return jsToInt<32>(_s); }
 
-inline std::string jsToBinary(std::string const& _s)
-{
-	return dev::toString(unpadded(jsToBytes(_s)));
-}
-
 inline std::string jsToDecimal(std::string const& _s)
 {
 	return dev::toString(jsToU256(_s));
@@ -125,6 +119,29 @@ inline double jsFromFixed(std::string const& _s)
 	return (double)jsToU256(_s) / (double)(dev::u256(1) << 128);
 }
 
+}
+
+// devcrypto
+
+#include <libdevcrypto/Common.h>
+
+namespace dev
+{
+
+inline Public jsToPublic(std::string const& _s) { return jsToFixed<sizeof(dev::Public)>(_s); }
+inline Secret jsToSecret(std::string const& _s) { return jsToFixed<sizeof(dev::Secret)>(_s); }
+
+}
+
+
+// ethcore
+namespace dev
+{
+namespace eth
+{
+
+inline Address jsToAddress(std::string const& _s) { return jsToFixed<sizeof(dev::Address)>(_s); }
+
 struct TransactionSkeleton
 {
 	Address from;
@@ -136,3 +153,4 @@ struct TransactionSkeleton
 };
 
 }
+}
diff --git a/libweb3jsonrpc/WebThreeStubServerBase.cpp b/libweb3jsonrpc/WebThreeStubServerBase.cpp
index 26a3382c8..bcaa31036 100644
--- a/libweb3jsonrpc/WebThreeStubServerBase.cpp
+++ b/libweb3jsonrpc/WebThreeStubServerBase.cpp
@@ -28,7 +28,7 @@
 #include <liblll/Compiler.h>
 #include <libethereum/Client.h>
 #include <libwebthree/WebThree.h>
-#include <libdevcore/CommonJS.h>
+#include <libethcore/CommonJS.h>
 #include <libwhisper/Message.h>
 #include <libwhisper/WhisperHost.h>
 #include <libserpent/funcs.h>
diff --git a/libweb3jsonrpc/WebThreeStubServerBase.h b/libweb3jsonrpc/WebThreeStubServerBase.h
index ee583efa3..ffb9e1738 100644
--- a/libweb3jsonrpc/WebThreeStubServerBase.h
+++ b/libweb3jsonrpc/WebThreeStubServerBase.h
@@ -36,9 +36,9 @@ namespace dev
 {
 class WebThreeNetworkFace;
 class KeyPair;
-struct TransactionSkeleton;
 namespace eth
 {
+struct TransactionSkeleton;
 class Interface;
 }
 namespace shh
@@ -122,7 +122,7 @@ public:
 	std::map<dev::Public, dev::Secret> const& ids() const { return m_ids; }
 
 protected:
-	virtual bool authenticate(dev::TransactionSkeleton const& _t);
+	virtual bool authenticate(dev::eth::TransactionSkeleton const& _t);
 
 protected:
 	virtual dev::eth::Interface* client() = 0;
diff --git a/mix/ClientModel.cpp b/mix/ClientModel.cpp
index 91e6bdd83..3a2b50999 100644
--- a/mix/ClientModel.cpp
+++ b/mix/ClientModel.cpp
@@ -24,7 +24,7 @@
 #include <QQmlApplicationEngine>
 #include <QStandardPaths>
 #include <jsonrpccpp/server.h>
-#include <libdevcore/CommonJS.h>
+#include <libethcore/CommonJS.h>
 #include <libethereum/Transaction.h>
 #include "AppContext.h"
 #include "DebuggingStateWrapper.h"
diff --git a/mix/ContractCallDataEncoder.cpp b/mix/ContractCallDataEncoder.cpp
index bdec95ca4..29b43bc11 100644
--- a/mix/ContractCallDataEncoder.cpp
+++ b/mix/ContractCallDataEncoder.cpp
@@ -23,7 +23,7 @@
 #include <QDebug>
 #include <QMap>
 #include <QStringList>
-#include <libdevcore/CommonJS.h>
+#include <libethcore/CommonJS.h>
 #include <libsolidity/AST.h>
 #include "QVariableDeclaration.h"
 #include "QVariableDefinition.h"
diff --git a/mix/DebuggingStateWrapper.cpp b/mix/DebuggingStateWrapper.cpp
index 42d0c97ac..d32be4989 100644
--- a/mix/DebuggingStateWrapper.cpp
+++ b/mix/DebuggingStateWrapper.cpp
@@ -26,7 +26,7 @@
 #include <QQmlEngine>
 #include <QVariantList>
 #include <libevmcore/Instruction.h>
-#include <libdevcore/CommonJS.h>
+#include <libethcore/CommonJS.h>
 #include <libdevcrypto/Common.h>
 #include <libevmcore/Instruction.h>
 #include <libdevcore/Common.h>
diff --git a/mix/QBigInt.cpp b/mix/QBigInt.cpp
index 191d20459..21d32a9c3 100644
--- a/mix/QBigInt.cpp
+++ b/mix/QBigInt.cpp
@@ -21,7 +21,7 @@
 
 #include <boost/variant/multivisitors.hpp>
 #include <boost/variant.hpp>
-#include <libdevcore/CommonJS.h>
+#include <libethcore/CommonJS.h>
 #include "QBigInt.h"
 
 using namespace dev;
diff --git a/mix/QBigInt.h b/mix/QBigInt.h
index c6ec72305..0712ff984 100644
--- a/mix/QBigInt.h
+++ b/mix/QBigInt.h
@@ -26,7 +26,7 @@
 #include "boost/variant/multivisitors.hpp"
 #include <QObject>
 #include <QQmlEngine>
-#include <libdevcore/CommonJS.h>
+#include <libethcore/CommonJS.h>
 #include <libdevcore/Common.h>
 
 using namespace dev;
diff --git a/mix/QVariableDefinition.cpp b/mix/QVariableDefinition.cpp
index a76388d68..c78273f99 100644
--- a/mix/QVariableDefinition.cpp
+++ b/mix/QVariableDefinition.cpp
@@ -20,7 +20,7 @@
  */
 
 #include <libdevcore/CommonData.h>
-#include <libdevcore/CommonJS.h>
+#include <libethcore/CommonJS.h>
 #include "QVariableDefinition.h"
 
 using namespace dev::mix;
diff --git a/test/commonjs.cpp b/test/commonjs.cpp
index 860b713dd..041a14f68 100644
--- a/test/commonjs.cpp
+++ b/test/commonjs.cpp
@@ -20,7 +20,8 @@
  */
 
 #include <boost/test/unit_test.hpp>
-#include <libdevcore/CommonJS.h>
+#include <libdevcore/Log.h>
+#include <libethcore/CommonJS.h>
 
 BOOST_AUTO_TEST_SUITE(commonjs)
 using namespace std;
@@ -41,7 +42,7 @@ BOOST_AUTO_TEST_CASE(jsToAddress)
 	cnote << "Testing jsToPublic...";
 	KeyPair kp = KeyPair::create();
 	string string = toJS(kp.address());
-	Address address = dev::jsToAddress(string);
+	Address address = dev::eth::jsToAddress(string);
 	BOOST_CHECK_EQUAL(kp.address(), address);
 }
 
diff --git a/test/jsonrpc.cpp b/test/jsonrpc.cpp
index 1f0a466b2..eaa9edc45 100644
--- a/test/jsonrpc.cpp
+++ b/test/jsonrpc.cpp
@@ -28,7 +28,7 @@
 #include <boost/lexical_cast.hpp>
 #include <libdevcore/Log.h>
 #include <libdevcore/CommonIO.h>
-#include <libdevcore/CommonJS.h>
+#include <libethcore/CommonJS.h>
 #include <libwebthree/WebThree.h>
 #include <libweb3jsonrpc/WebThreeStubServer.h>
 #include <jsonrpccpp/server/connectors/httpserver.h>