1 files changed, 15 insertions, 1 deletions
diff --git a/ethutil/value.go b/ethutil/value.go
index 46681ec2a..b7756f9b1 100644
--- a/ethutil/value.go
+++ b/ethutil/value.go
@@ -20,7 +20,12 @@ func (val *Value) String() string {
 }
 
 func NewValue(val interface{}) *Value {
-	return &Value{Val: val}
+	t := val
+	if v, ok := val.(*Value); ok {
+		t = v.Val
+	}
+
+	return &Value{Val: t}
 }
 
 func (val *Value) Type() reflect.Kind {
@@ -149,6 +154,15 @@ func (val *Value) IsStr() bool {
 	return val.Type() == reflect.String
 }
 
+// Special list checking function. Something is considered
+// a list if it's of type []interface{}. The list is usually
+// used in conjunction with rlp decoded streams.
+func (val *Value) IsList() bool {
+	_, ok := val.Val.([]interface{})
+
+	return ok
+}
+
 func (val *Value) IsEmpty() bool {
 	return val.Val == nil || ((val.IsSlice() || val.IsStr()) && val.Len() == 0)
 }