[age restriction] progress 11/n

Parse age restriction information from "/keys"
- parse "age_restriction" extension, extract mask for age groups
- parse denominations from "age_restricted_denoms", too, if available

2 files changed, 11 insertions, 1 deletions

diff --git a/src/include/taler_exchange_service.h b/src/include/taler_exchange_service.h
index 04b731b32..6976293cb 100644
--- a/src/include/taler_exchange_service.h
+++ b/src/include/taler_exchange_service.h
@@ -159,6 +159,11 @@ struct TALER_EXCHANGE_DenomPublicKey
    * revoked by the exchange.
    */
   bool revoked;
+
+  /**
+   * Is the denomination age-restricted?
+   */
+  bool age_restricted;
 };
 
 
@@ -283,6 +288,11 @@ struct TALER_EXCHANGE_Keys
   struct GNUNET_TIME_Timestamp last_denom_issue_date;
 
   /**
+   * If age restriction is enabled on the exchange, we get an non-zero age_mask
+   */
+  struct TALER_AgeMask age_mask;
+
+  /**
    * Length of the @e sign_keys array (number of valid entries).
    */
   unsigned int num_sign_keys;
diff --git a/src/include/taler_extensions.h b/src/include/taler_extensions.h
index 199776eb7..243811eb5 100644
--- a/src/include/taler_extensions.h
+++ b/src/include/taler_extensions.h
@@ -110,7 +110,7 @@ TALER_extension_get_by_name (const char *name,
  * @return Error, if age groups were invalid, OK otherwise.
  */
 enum TALER_Extension_ReturnValue
-TALER_parse_age_group_string (char *groups,
+TALER_parse_age_group_string (const char *groups,
                               struct TALER_AgeMask *mask);
 
 /**