Trie fixes

ethutil/bytes.go

@@ -150,12 +150,16 @@ func LeftPadBytes(slice []byte, l int) []byte {
 	return padded
 }
 
-func Address(slice []byte) []byte {
+func Address(slice []byte) (addr []byte) {
 	if len(slice) < 20 {
-		slice = LeftPadBytes(slice, 20)
+		addr = LeftPadBytes(slice, 20)
 	} else if len(slice) > 20 {
-		slice = slice[len(slice)-20:]
+		addr = slice[len(slice)-20:]
+	} else {
+		addr = slice
 	}
 
-	return slice
+	addr = CopyBytes(addr)
+
+	return
 }

ethutil/value.go

@@ -40,13 +40,9 @@ func (val *Value) Len() int {
 	//return val.kind.Len()
 	if data, ok := val.Val.([]interface{}); ok {
 		return len(data)
-	} else if data, ok := val.Val.([]byte); ok {
-		return len(data)
-	} else if data, ok := val.Val.(string); ok {
-		return len(data)
 	}
 
-	return 0
+	return len(val.Bytes())
 }
 
 func (val *Value) Raw() interface{} {
@@ -118,6 +114,8 @@ func (val *Value) Bytes() []byte {
 		return []byte{s}
 	} else if s, ok := val.Val.(string); ok {
 		return []byte(s)
+	} else if s, ok := val.Val.(*big.Int); ok {
+		return s.Bytes()
 	}
 
 	return []byte{}