diff --git a/newcoin.vcxproj b/newcoin.vcxproj
index e29623a848..adb8abc714 100644
--- a/newcoin.vcxproj
+++ b/newcoin.vcxproj
@@ -102,12 +102,14 @@
     <ClCompile Include="src\CanonicalTXSet.cpp" />
     <ClCompile Include="src\Config.cpp" />
     <ClCompile Include="src\ConnectionPool.cpp" />
+    <ClCompile Include="src\Contract.cpp" />
     <ClCompile Include="src\Conversion.cpp" />
     <ClCompile Include="src\DBInit.cpp" />
     <ClCompile Include="src\DeterministicKeys.cpp" />
     <ClCompile Include="src\ECIES.cpp" />
     <ClCompile Include="src\HashedObject.cpp" />
     <ClCompile Include="src\HttpsClient.cpp" />
+    <ClCompile Include="src\Interpreter.cpp" />
     <ClCompile Include="src\Ledger.cpp" />
     <ClCompile Include="src\LedgerAcquire.cpp" />
     <ClCompile Include="src\LedgerConsensus.cpp" />
@@ -198,6 +200,7 @@
     <ClInclude Include="src\HttpReply.h" />
     <ClInclude Include="src\HttpRequest.h" />
     <ClInclude Include="src\HttpsClient.h" />
+    <ClInclude Include="src\Interpreter.h" />
     <ClInclude Include="src\key.h" />
     <ClInclude Include="src\Ledger.h" />
     <ClInclude Include="src\LedgerAcquire.h" />
diff --git a/newcoin.vcxproj.filters b/newcoin.vcxproj.filters
index dd3b6d700c..b97a607c9e 100644
--- a/newcoin.vcxproj.filters
+++ b/newcoin.vcxproj.filters
@@ -282,6 +282,12 @@
     <ClCompile Include="src\OrderBook.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="src\Contract.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="src\Interpreter.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="KnownNodeList.h">
@@ -527,6 +533,9 @@
     <ClInclude Include="src\Contract.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="src\Interpreter.h">
+      <Filter>Source Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include="wallet.xml" />
diff --git a/src/Config.cpp b/src/Config.cpp
index 4e36f39a1b..92034ed9d7 100644
--- a/src/Config.cpp
+++ b/src/Config.cpp
@@ -12,6 +12,7 @@
 #define SECTION_FEE_DEFAULT				"fee_default"
 #define SECTION_FEE_NICKNAME_CREATE		"fee_nickname_create"
 #define SECTION_FEE_OFFER				"fee_offer"
+#define SECTION_FEE_OPERATION			"fee_operation"
 #define SECTION_IPS						"ips"
 #define SECTION_NETWORK_QUORUM			"network_quorum"
 #define SECTION_PEER_CONNECT_LOW_WATER	"peer_connect_low_water"
@@ -37,6 +38,7 @@
 #define DEFAULT_FEE_ACCOUNT_CREATE		1000
 #define DEFAULT_FEE_NICKNAME_CREATE		1000
 #define DEFAULT_FEE_OFFER				DEFAULT_FEE_DEFAULT
+#define DEFAULT_FEE_OPERATION			1
 
 Config theConfig;
 
@@ -145,6 +147,7 @@ void Config::setup(const std::string& strConf)
 	FEE_NICKNAME_CREATE		= DEFAULT_FEE_NICKNAME_CREATE;
 	FEE_OFFER				= DEFAULT_FEE_OFFER;
 	FEE_DEFAULT				= DEFAULT_FEE_DEFAULT;
+	FEE_CONTRACT_OPERATION  = DEFAULT_FEE_OPERATION;
 
 	ACCOUNT_PROBE_MAX		= 10;
 
@@ -258,6 +261,9 @@ void Config::load()
 			if (sectionSingleB(secConfig, SECTION_FEE_DEFAULT, strTemp))
 				FEE_DEFAULT			= boost::lexical_cast<int>(strTemp);
 
+			if (sectionSingleB(secConfig, SECTION_FEE_OPERATION, strTemp))
+				FEE_CONTRACT_OPERATION	= boost::lexical_cast<int>(strTemp);
+
 			if (sectionSingleB(secConfig, SECTION_ACCOUNT_PROBE_MAX, strTemp))
 				ACCOUNT_PROBE_MAX	= boost::lexical_cast<int>(strTemp);
 
diff --git a/src/Config.h b/src/Config.h
index 89fb60b3de..6fc42dca35 100644
--- a/src/Config.h
+++ b/src/Config.h
@@ -97,6 +97,7 @@ public:
 	uint64						FEE_ACCOUNT_CREATE;		// Fee to create an account.
 	uint64						FEE_NICKNAME_CREATE;	// Fee to create a nickname.
 	uint64						FEE_OFFER;				// Rate per day.
+	int							FEE_CONTRACT_OPERATION; // fee for each contract operation
 
 	// Client behavior
 	int							ACCOUNT_PROBE_MAX;		// How far to scan for accounts.