diff --git a/libdevcore/CMakeLists.txt b/libdevcore/CMakeLists.txt
index 3fb79cbea..0fbec77d2 100644
--- a/libdevcore/CMakeLists.txt
+++ b/libdevcore/CMakeLists.txt
@@ -1,26 +1,9 @@
-cmake_policy(SET CMP0015 NEW)
-
-aux_source_directory(. SOURCES)
-
-include_directories(BEFORE ${JSONCPP_INCLUDE_DIRS})
-include_directories(BEFORE ..)
-
-set(EXECUTABLE devcore)
-
+file(GLOB SOURCES "*.cpp")
 file(GLOB HEADERS "*.h")
 
-add_library(devcore ${SOURCES} ${HEADERS})
-
-target_link_libraries(devcore PUBLIC ${JSONCPP_LIBRARIES} Boost::boost)
-
-if (APPLE)
-	find_package(Threads REQUIRED)
-	target_link_libraries(${EXECUTABLE} PRIVATE ${CMAKE_THREAD_LIBS_INIT})
-elseif (UNIX)
-	find_package(Threads REQUIRED)
-	target_link_libraries(${EXECUTABLE} PRIVATE ${CMAKE_THREAD_LIBS_INIT})
-endif()
-
-install( TARGETS ${EXECUTABLE} RUNTIME DESTINATION bin ARCHIVE DESTINATION lib LIBRARY DESTINATION lib )
-install( FILES ${HEADERS} DESTINATION include/${EXECUTABLE} )
+find_package(Threads)
 
+add_library(devcore ${SOURCES} ${HEADERS})
+target_link_libraries(devcore PUBLIC Boost::boost)
+target_link_libraries(devcore PRIVATE ${CMAKE_THREAD_LIBS_INIT})
+#target_include_directories(devcore PRIVATE ..)
\ No newline at end of file
diff --git a/libdevcore/CommonJS.cpp b/libdevcore/CommonJS.cpp
deleted file mode 100644
index 262944b65..000000000
--- a/libdevcore/CommonJS.cpp
+++ /dev/null
@@ -1,103 +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 CommonJS.cpp
- * @authors:
- *   Gav Wood <i@gavwood.com>
- *   Marek Kotewicz <marek@ethdev.com>
- * @date 2014
- */
-
-#include "CommonJS.h"
-
-using namespace std;
-
-namespace dev
-{
-
-bytes jsToBytes(string const& _s)
-{
-	if (_s.substr(0, 2) == "0x")
-		// Hex
-		return fromHex(_s.substr(2));
-	else if (_s.find_first_not_of("0123456789") == string::npos)
-		// Decimal
-		return toCompactBigEndian(bigint(_s));
-	else
-		return bytes();
-}
-
-bytes padded(bytes _b, unsigned _l)
-{
-	while (_b.size() < _l)
-		_b.insert(_b.begin(), 0);
-	return asBytes(asString(_b).substr(_b.size() - max(_l, _l)));
-}
-
-bytes paddedRight(bytes _b, unsigned _l)
-{
-	_b.resize(_l);
-	return _b;
-}
-
-bytes unpadded(bytes _b)
-{
-	auto p = asString(_b).find_last_not_of((char)0);
-	_b.resize(p == string::npos ? 0 : (p + 1));
-	return _b;
-}
-
-bytes unpadLeft(bytes _b)
-{
-	unsigned int i = 0;
-	if (_b.size() == 0)
-		return _b;
-
-	while (i < _b.size() && _b[i] == byte(0))
-		i++;
-
-	if (i != 0)
-		_b.erase(_b.begin(), _b.begin() + i);
-	return _b;
-}
-
-string fromRaw(h256 _n, unsigned* _inc)
-{
-	if (_n)
-	{
-		string s((char const*)_n.data(), 32);
-		auto l = s.find_first_of('\0');
-		if (!l)
-			return "";
-		if (l != string::npos)
-		{
-			auto p = s.find_first_not_of('\0', l);
-			if (!(p == 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 "";
-}
-
-}
-
diff --git a/libdevcore/CommonJS.h b/libdevcore/CommonJS.h
index 02b9496a2..e48d24df5 100644
--- a/libdevcore/CommonJS.h
+++ b/libdevcore/CommonJS.h
@@ -30,11 +30,6 @@
 namespace dev
 {
 
-template <unsigned S> std::string toJS(FixedHash<S> const& _h)
-{
-	return "0x" + toHex(_h.ref());
-}
-
 template <unsigned N> std::string toJS(boost::multiprecision::number<boost::multiprecision::cpp_int_backend<N, N, boost::multiprecision::unsigned_magnitude, boost::multiprecision::unchecked, void>> const& _n)
 {
 	std::string h = toHex(toCompactBigEndian(_n, 1));
@@ -43,58 +38,6 @@ template <unsigned N> std::string toJS(boost::multiprecision::number<boost::mult
 	return "0x" + res;
 }
 
-inline std::string toJS(bytes const& _n, std::size_t _padding = 0)
-{
-	bytes n = _n;
-	n.resize(std::max<unsigned>(n.size(), _padding));
-	return "0x" + toHex(n);
-}
-
-template<unsigned T> std::string toJS(SecureFixedHash<T> const& _i)
-{
-	std::stringstream stream;
-	stream << "0x" << _i.makeInsecure().hex();
-	return stream.str();
-}
-
-template<typename T> std::string toJS(T const& _i)
-{
-	std::stringstream stream;
-	stream << "0x" << std::hex << _i;
-	return stream.str();
-}
-
-/// Convert string to byte array. Input parameters can be hex or dec. Returns empty array if invalid input e.g neither dec or hex.
-bytes jsToBytes(std::string const& _s);
-/// Add '0' on, or remove items from, the front of @a _b until it is of length @a _l.
-bytes padded(bytes _b, unsigned _l);
-/// Add '0' on, or remove items from,  the back of @a _b until it is of length @a _l.
-bytes paddedRight(bytes _b, unsigned _l);
-/// Removing all trailing '0'. Returns empty array if input contains only '0' char.
-bytes unpadded(bytes _s);
-/// Remove all 0 byte on the head of @a _s.
-bytes unpadLeft(bytes _s);
-/// Convert h256 into user-readable string (by directly using std::string constructor).
-std::string fromRaw(h256 _n, unsigned* _inc = nullptr);
-
-template <unsigned N> FixedHash<N> jsToFixed(std::string const& _s)
-{
-	if (_s.substr(0, 2) == "0x")
-		// Hex
-		return FixedHash<N>(_s.substr(2 + std::max<unsigned>(N * 2, _s.size() - 2) - N * 2));
-	else if (_s.find_first_not_of("0123456789") == std::string::npos)
-		// Decimal
-		return (typename FixedHash<N>::Arith)(_s);
-	else
-		// Binary
-		return FixedHash<N>();	// FAIL
-}
-
-inline std::string jsToFixed(double _s)
-{
-	return toJS(u256(_s * (double)(u256(1) << 128)));
-}
-
 template <unsigned N> boost::multiprecision::number<boost::multiprecision::cpp_int_backend<N * 8, N * 8, boost::multiprecision::unsigned_magnitude, boost::multiprecision::unchecked, void>> jsToInt(std::string const& _s)
 {
 	if (_s.substr(0, 2) == "0x")
@@ -108,16 +51,4 @@ template <unsigned N> boost::multiprecision::number<boost::multiprecision::cpp_i
 		return 0;			// FAIL
 }
 
-inline u256 jsToU256(std::string const& _s) { return jsToInt<32>(_s); }
-
-inline int jsToInt(std::string const& _s)
-{
-	return std::stoi(_s, nullptr, 0);
-}
-
-inline std::string jsToDecimal(std::string const& _s)
-{
-	return toString(jsToU256(_s));
-}
-
 }
diff --git a/libdevcore/SHA3.cpp b/libdevcore/SHA3.cpp
index d2cd40b16..3f4fd2c96 100644
--- a/libdevcore/SHA3.cpp
+++ b/libdevcore/SHA3.cpp
@@ -20,18 +20,13 @@
  */
 
 #include "SHA3.h"
-#include <cstdint>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <libdevcore/RLP.h>
+#include "RLP.h"
 using namespace std;
 using namespace dev;
 
 namespace dev
 {
 
-h256 EmptySHA3 = sha3(bytesConstRef());
 h256 EmptyListSHA3 = sha3(rlpList());
 
 namespace keccak
diff --git a/libethcore/BlockInfo.h b/libethcore/BlockInfo.h
index 93ffac14c..c0082d7cb 100644
--- a/libethcore/BlockInfo.h
+++ b/libethcore/BlockInfo.h
@@ -111,8 +111,6 @@ public:
 	}
 	bool operator!=(BlockInfo const& _cmp) const { return !operator==(_cmp); }
 
-	u256 calculateDifficulty(BlockInfo const& _parent) const;
-	u256 childGasLimit(u256 const& _gasFloorTarget = UndefinedU256) const;
 	h256 const& boundary() const;
 
 	h256 const& parentHash() const { return m_parentHash; }