lib/util.c: xbps_remote_binpkg_exists to check if signature and binpkg are cached

include/xbps.h.in

@@ -1913,6 +1913,17 @@ bool xbps_pkg_is_ignored(struct xbps_handle *xhp, const char *pkg);
  */
 bool xbps_binpkg_exists(struct xbps_handle *xhp, xbps_dictionary_t pkgd);
 
+/**
+ * Returns true if binary package and signature exists in cachedir,
+ * false otherwise.
+ *
+ * @param[in] xhp The pointer to an xbps_handle struct.
+ * @param[in] pkgd Package dictionary returned by rpool.
+ *
+ * @return true if exists, false otherwise.
+ */
+bool xbps_remote_binpkg_exists(struct xbps_handle *xhp, xbps_dictionary_t pkgd);
+
 /**
  * Checks if the URI specified by \a uri is remote or local.
  *