-- | Binder which concatenates the two signatures and hashes them
hashSigs :: Binder
-hashSigs = Binder $ \m m' -> toBytes $ (HMAC . hash $ BS.append (toBytes $ signature m') (toBytes $ signature m) :: HMAC SHA256)
+hashSigs = Binder $ \m m' -> toBytes (HMAC . hash $ BS.append (toBytes $ signature m') (toBytes $ signature m) :: HMAC SHA256)