document test vector for #6855

1 files changed, 35 insertions, 1 deletions

diff --git a/design-documents/018-contract-json.rst b/design-documents/018-contract-json.rst
index 4208febc..2162d6ed 100644
--- a/design-documents/018-contract-json.rst
+++ b/design-documents/018-contract-json.rst
@@ -102,7 +102,7 @@ member of the parent object.
     },
    }
 
-   => 
+   =>
 
    {
     ...props,
@@ -146,6 +146,40 @@ resulting bytes are terminated with a single 0-byte and then hashed with
 SHA512.
 
 
+Test vector
+-----------
+
+The follwing input contains top-level and nested forgettable
+fields, as well as booleans, integers, strings and objects
+as well as non-forgettable fields.  It is thus suitable as
+a minimal interoperability test:
+
+.. code-block:: json
+
+  {
+    "k1": 1,
+    "_forgettable": {
+      "k1": "SALT"
+    },
+    "k2": {
+      "n1": true,
+      "_forgettable": {
+        "n1": "salt"
+      }
+    },
+    "k3": {
+      "n1": "string"
+    }
+  }
+
+Hashing the above contract results in the following Crockford base32 encoded
+hash
+``287VXK8T6PXKD05W8Y94QJNEFCMRXBC9S7KNKTWGH2G2J2D7RYKPSHNH1HG9NT1K2HRHGC67W6QM6GEC4BSN1DPNEBCS0AVDT2DBP5G''.
+
+Note that typically the salt values must be chosen at random, only for this test we use static salt values.
+
+
+
 Discussion / Q&A
 ================