diff --git a/include/fc/time.hpp b/include/fc/time.hpp
index 57acead..d2bda19 100644
--- a/include/fc/time.hpp
+++ b/include/fc/time.hpp
@@ -10,6 +10,7 @@ namespace fc {
         explicit microseconds( int64_t c = 0) :_count(c){}
         static microseconds max() { return microseconds(0x7fffffffffffffffll); }
         friend microseconds operator + (const  microseconds& l, const microseconds& r ) { return microseconds(l._count+r._count); }
+        friend microseconds operator - (const  microseconds& l, const microseconds& r ) { return microseconds(l._count-r._count); }
 
         bool operator==(const microseconds& c)const { return _count == c._count; }
         friend bool operator>(const microseconds& a, const microseconds& b){ return a._count > b._count; }
@@ -41,6 +42,7 @@ namespace fc {
         bool   operator !=( const time_point& t )const                              { return elapsed._count !=t.elapsed._count; }
         time_point&  operator += ( const microseconds& m )                          { elapsed+=m; return *this;               }
         friend time_point   operator + ( const time_point& t, const microseconds& m ) { return time_point(t.elapsed+m);         }
+        friend time_point   operator - ( const time_point& t, const microseconds& m ) { return time_point(t.elapsed-m);         }
         friend microseconds operator - ( const time_point& t, const time_point& m ) { return microseconds(t.elapsed.count() - m.elapsed.count()); }
     private:
         microseconds elapsed; 
diff --git a/include/fc/value_cast.hpp b/include/fc/value_cast.hpp
index 52aaa55..d29ca2c 100644
--- a/include/fc/value_cast.hpp
+++ b/include/fc/value_cast.hpp
@@ -9,6 +9,7 @@
 #include <fc/vector.hpp>
 #include <fc/typename.hpp>
 #include <fc/error_report.hpp>
+#include <vector>
 
 //#include <typeinfo>
 
@@ -34,6 +35,28 @@ namespace fc {
         void cast_value( const value& v, T& t) {
            unpack(v,t);
         }
+        template<typename T>
+        void cast_value( const value& v, std::vector<T>& out ) {
+           if( v.type() != value::array_type ) {
+              FC_THROW_REPORT( "Error casting ${type} to array", fc::value("type", fc::reflector<value::value_type>::to_string(v.type()) ) );
+           }
+           out.resize(v.size());
+           slog( "out .size %d", out.size() );
+           const fc::vector<value>& val = v.as_array();
+           auto oitr = out.begin();
+           int  idx = 0;
+           for( auto itr = val.begin(); itr != val.end(); ++itr, ++oitr, ++idx ) {
+              try {
+                 *oitr = itr->cast<T>(); //value_cast<T>(*itr);
+                // value_cast( *itr, *oitr );
+              } catch ( fc::error_report& er ) {
+                 throw FC_REPORT_PUSH( er, "Error casting value[${index}] to ${type}", 
+                                       fc::value("index",idx)
+                                                ("type", fc::get_typename<T>::name())
+                                     );
+              }
+           }
+        }
        
         template<typename T>
         void cast_value( const value& v, fc::vector<T>& out ) {
@@ -41,12 +64,13 @@ namespace fc {
               FC_THROW_REPORT( "Error casting ${type} to array", fc::value("type", fc::reflector<value::value_type>::to_string(v.type()) ) );
            }
            out.resize(v.size());
+           slog( "out .size %d", out.size() );
            const fc::vector<value>& val = v.as_array();
            auto oitr = out.begin();
            int  idx = 0;
            for( auto itr = val.begin(); itr != val.end(); ++itr, ++oitr, ++idx ) {
               try {
-                 *oitr = value_cast<T>(*itr);
+                 *oitr = itr->cast<T>(); //value_cast<T>(*itr);
                 // value_cast( *itr, *oitr );
               } catch ( fc::error_report& er ) {
                  throw FC_REPORT_PUSH( er, "Error casting value[${index}] to ${type}", 
diff --git a/include/fc/value_io.hpp b/include/fc/value_io.hpp
index a9efa4a..e69f002 100644
--- a/include/fc/value_io.hpp
+++ b/include/fc/value_io.hpp
@@ -54,6 +54,8 @@ namespace fc {
   void pack( fc::value& jsv, const fc::vector<char>& value );
   template<typename T>
   void pack( fc::value& jsv, const fc::vector<T>& value );
+  template<typename T>
+  void pack( fc::value& jsv, const std::vector<T>& value );
 
 
   inline void unpack( const fc::value& jsv, fc::value& v ) { v = jsv; }
@@ -82,6 +84,8 @@ namespace fc {
   void unpack( const fc::value& jsv, fc::vector<char>& value );
   template<typename T>
   void unpack( const fc::value& jsv, fc::vector<T>& value );
+  template<typename T>
+  void unpack( const fc::value& jsv, std::vector<T>& value );
 
   namespace detail {
     template<typename Class>
@@ -249,6 +253,19 @@ namespace fc {
           ++i;
       }
   }
+  template<typename T>
+  inline void pack( fc::value& jsv, const std::vector<T>& value ) {
+      jsv = fc::value::array();
+      jsv.resize(value.size());
+      auto itr = value.begin();
+      auto end = value.end();
+      uint32_t i = 0;
+      while( itr != end ) {
+          fc::pack( jsv[i], *itr );
+          ++itr;
+          ++i;
+      }
+  }
   struct tuple_to_value_visitor {
     tuple_to_value_visitor( value& v ):_val(v),_count(0) { }
     template<typename T>
@@ -291,6 +308,14 @@ namespace fc {
           unpack( jsv[i], val[i] );
       }
   }
+  template<typename T>
+  inline void unpack( const fc::value& jsv, std::vector<T>& val ) {
+      val.resize( jsv.size() );
+      uint32_t s = jsv.size();
+      for( uint32_t i = 0; i < s; ++i ) {
+          unpack( jsv[i], val[i] );
+      }
+  }
 
   // default case
   template<typename T> 
diff --git a/include/fc/vector.hpp b/include/fc/vector.hpp
index 1a56e3e..4396c4e 100644
--- a/include/fc/vector.hpp
+++ b/include/fc/vector.hpp
@@ -4,6 +4,7 @@
 #include <string.h>
 #include <fc/utility.hpp>
 #include <fc/log.hpp>
+#include <vector>
 
 
 namespace fc {
diff --git a/src/value.cpp b/src/value.cpp
index 9bfc788..3a11de4 100644
--- a/src/value.cpp
+++ b/src/value.cpp
@@ -202,6 +202,7 @@ namespace fc {
 
        void cast_value( const value& v, int64_t& out ){
           v.visit( cast_visitor<int64_t>(out) );
+          slog( "cast_value( v, int64: %lld )", out );
        }
 
        void cast_value( const value& v, uint8_t& out ){