metainfo/metainfo.go | 4 ++++

diff --git a/metainfo/metainfo.go b/metainfo/metainfo.go
index 52ba9bf6fcf1d8a822702d22029839c83f648867..872407b4972697c78dd3d0497bfb563366a55cc4 100644
--- a/metainfo/metainfo.go
+++ b/metainfo/metainfo.go
@@ -78,6 +78,10 @@ 	}
 	return me.Info.PieceLength
 }
 
+func (me piece) Hash() []byte {
+	return me.Info.Pieces[me.i*20 : (me.i+1)*20]
+}
+
 func (me *Info) Piece(i int) piece {
 	return piece{me, i}
 }