fixes for develop+permissions merge

common/word.go

@@ -28,6 +28,12 @@ func (w Word256) Compare(other Word256) int {
 	return bytes.Compare(w[:], other[:])
 }
 
+func Uint64ToWord256(i uint64) Word256 {
+	buf := [8]byte{}
+	PutUint64BE(buf[:], i)
+	return LeftPadWord256(buf[:])
+}
+
 func Int64ToWord256(i int64) Word256 {
 	buf := [8]byte{}
 	PutInt64BE(buf[:], i)
@@ -44,6 +50,11 @@ func LeftPadWord256(bz []byte) (word Word256) {
 	return
 }
 
+func Uint64FromWord256(word Word256) uint64 {
+	buf := word.Postfix(8)
+	return GetUint64BE(buf)
+}
+
 func Int64FromWord256(word Word256) int64 {
 	buf := word.Postfix(8)
 	return GetInt64BE(buf)