Add hash-backend and update README.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/eris.lisp b/src/eris.lisp
index 4693104..ed4a05e 100644
--- a/src/eris.lisp
+++ b/src/eris.lisp
@@ -81,6 +81,7 @@ object, using the bytes from the OCTETS vector from at START."
     (make-instance 'reference-pair :key key :reference reference)))
 
 (defun decrypt-block (input key &optional (nonce null-secret))
+  (declare (type octet-vector input key nonce))
   (ironclad:decrypt-in-place
    (ironclad:make-cipher :chacha :mode :stream :key key :initialization-vector nonce)
    input)