add uuid-display to reducer and document it

1 files changed, 5 insertions, 2 deletions

diff --git a/doc/sphinx/reducer.rst b/doc/sphinx/reducer.rst
index 1c69971..b091c1d 100644
--- a/doc/sphinx/reducer.rst
+++ b/doc/sphinx/reducer.rst
@@ -1307,12 +1307,14 @@ a state where the user can choose which challenges to satisfy:
         "challenges": [
           {
             "uuid": "MW2R3RCBZPHNC78AW8AKWRCHF9KV3Y82EN62T831ZP54S3K5599G",
+            "uuid-display": "MW2R3RC",
             "cost": "TESTKUDOS:0",
             "type": "question",
             "instructions": "q1"
           },
           {
             "uuid": "TXYKGE1SJZHJ4M2FKSV1P2RZVNTHZFB9E3A79QE956D3SCAWXPK0",
+            "uuid-display": "TXYKGE",
             "cost": "TESTKUDOS:0",
             "type": "email",
             "instructions": "e-mail address m?il@f*.bar"
@@ -1347,8 +1349,9 @@ obtained and its ``version`` are also provided.  Each challenge comes with
 four mandatory fields:
 
     - **uuid**: A unique identifier of the challenge; this is what the
-      UUIDs in the policies array refer to, but also this UUID may be
-      included in messages sent to the user. They allow the user to
+      UUIDs in the policies array refer to.
+    - **uuid-display**: Shortened idenfier which is included in messages
+      send to the user.  Allows the user to
       distinguish different PIN/TANs should say the same phone number be
       used for SMS-authentication with different providers.
     - **cost**: This is the amount the Anastasis provider will charge