finshing json parsing support for /refresh/melt handling

src/mint-lib/mint_api_json.c

@@ -253,6 +253,37 @@ parse_json (json_t *root,
       }
       break;
 
+    case MAJ_CMD_UINT16:
+      {
+        json_int_t val;
+
+        if (! json_is_integer (pos))
+        {
+          GNUNET_break_op (0);
+          return i;
+        }
+        val = json_integer_value (pos);
+        if ( (0 > val) || (val > UINT16_MAX) )
+        {
+          GNUNET_break_op (0);
+          return i;
+        }
+        *spec[i].details.u16 = (uint16_t) val;
+      }
+      break;
+
+    case MAJ_CMD_JSON_OBJECT:
+      {
+        if (! (json_is_object (pos) || json_is_array (pos)) )
+        {
+          GNUNET_break_op (0);
+          return i;
+        }
+        json_incref (pos);
+        *spec[i].details.obj = pos;
+      }
+      break;
+
     default:
       GNUNET_break (0);
       return i;
@@ -307,6 +338,10 @@ parse_free (struct MAJ_Specification *spec,
       GNUNET_free (*spec[i].details.eddsa_signature.purpose_p);
       *spec[i].details.eddsa_signature.purpose_p = NULL;
       break;
+    case MAJ_CMD_JSON_OBJECT:
+      json_decref (*spec[i].details.obj);
+      *spec[i].details.obj = NULL;
+      break;
     default:
       GNUNET_break (0);
       break;
@@ -417,6 +452,46 @@ MAJ_spec_amount (const char *name,
 }
 
 
+/**
+ * 16-bit integer.
+ *
+ * @param name name of the JSON field
+ * @param[out] u16 where to store the integer found under @a name
+ */
+struct MAJ_Specification
+MAJ_spec_uint16 (const char *name,
+                 uint16_t *u16)
+{
+  struct MAJ_Specification ret =
+    {
+      .cmd = MAJ_CMD_UINT16,
+      .field = name,
+      .details.u16 = u16
+    };
+  return ret;
+}
+
+
+/**
+ * JSON object.
+ *
+ * @param name name of the JSON field
+ * @param[out] jsonp where to store the JSON found under @a name
+ */
+struct MAJ_Specification
+MAJ_spec_json (const char *name,
+               json_t **jsonp)
+{
+  struct MAJ_Specification ret =
+    {
+      .cmd = MAJ_CMD_JSON_OBJECT,
+      .field = name,
+      .details.obj = jsonp
+    };
+  return ret;
+}
+
+
 /**
  * Specification for parsing an RSA public key.
  *

src/mint-lib/mint_api_json.h

@@ -79,7 +79,17 @@ enum MAJ_Command
   MAJ_CMD_STRING,
 
   /**
-   * Parse  at current position.
+   * Parse `uint16_t` integer at the current position.
+   */
+  MAJ_CMD_UINT16,
+
+  /**
+   * Parse JSON object at the current position.
+   */
+  MAJ_CMD_JSON_OBJECT,
+
+  /**
+   * Parse ??? at current position.
    */
   MAJ_CMD_C
 
@@ -181,6 +191,16 @@ struct MAJ_Specification
      */
     const char **strptr;
 
+    /**
+     * Where to store 16-bit integer.
+     */
+    uint16_t *u16;
+
+    /**
+     * Where to store a JSON object.
+     */
+    json_t **obj;
+
   } details;
 
 };
@@ -249,13 +269,35 @@ MAJ_spec_string (const char *name,
  * Absolute time.
  *
  * @param name name of the JSON field
- * @param at where to store the absolute time found under @a name
+ * @param[out] at where to store the absolute time found under @a name
  */
 struct MAJ_Specification
 MAJ_spec_absolute_time (const char *name,
                         struct GNUNET_TIME_Absolute *at);
 
 
+/**
+ * 16-bit integer.
+ *
+ * @param name name of the JSON field
+ * @param[out] u16 where to store the integer found under @a name
+ */
+struct MAJ_Specification
+MAJ_spec_uint16 (const char *name,
+                 uint16_t *u16);
+
+
+/**
+ * JSON object.
+ *
+ * @param name name of the JSON field
+ * @param[out] jsonp where to store the JSON found under @a name
+ */
+struct MAJ_Specification
+MAJ_spec_json (const char *name,
+               json_t **jsonp);
+
+
 /**
  * Specification for parsing an amount value.
  *

src/mint-lib/mint_api_refresh.c

@@ -1063,7 +1063,7 @@ verify_refresh_melt_signature_ok (struct TALER_MINT_RefreshMeltHandle *rmh,
   struct MAJ_Specification spec[] = {
     MAJ_spec_fixed_auto ("mint_sig", &mint_sig),
     MAJ_spec_fixed_auto ("mint_pub", &mint_sig),
-    // MAJ_spec_uint16 ("noreveal_index", noreveal_index), // FIXME!
+    MAJ_spec_uint16 ("noreveal_index", noreveal_index),
     MAJ_spec_end
   };
   struct TALER_RefreshMeltConfirmationPS confirm;
@@ -1124,7 +1124,7 @@ verify_refresh_melt_signature_forbidden (struct TALER_MINT_RefreshMeltHandle *rm
   struct TALER_CoinSpendPublicKeyP coin_pub;
   unsigned int i;
   struct MAJ_Specification spec[] = {
-    // MAJ_spec_json ("history", &history), // FIXME!
+    MAJ_spec_json ("history", &history),
     MAJ_spec_fixed_auto ("coin_pub", &coin_pub),
     MAJ_spec_amount ("original_value", &original_value),
     MAJ_spec_amount ("requested_value", &melt_value_with_fee),
@@ -1165,6 +1165,7 @@ verify_refresh_melt_signature_forbidden (struct TALER_MINT_RefreshMeltHandle *rm
   {
     /* coin not found in our original request */
     GNUNET_break_op (0);
+    json_decref (history);
     return GNUNET_SYSERR;
   }
 
@@ -1174,6 +1175,7 @@ verify_refresh_melt_signature_forbidden (struct TALER_MINT_RefreshMeltHandle *rm
   {
     /* We disagree on the value of the coin */
     GNUNET_break_op (0);
+    json_decref (history);
     return GNUNET_SYSERR;
   }
   if (0 != TALER_amount_cmp (&melt_value_with_fee,
@@ -1181,6 +1183,7 @@ verify_refresh_melt_signature_forbidden (struct TALER_MINT_RefreshMeltHandle *rm
   {
     /* We disagree on the value of the coin */
     GNUNET_break_op (0);
+    json_decref (history);
     return GNUNET_SYSERR;
   }
 
@@ -1194,8 +1197,10 @@ verify_refresh_melt_signature_forbidden (struct TALER_MINT_RefreshMeltHandle *rm
                                        &total))
   {
     GNUNET_break_op (0);
+    json_decref (history);
     return GNUNET_SYSERR;
   }
+  json_decref (history);
 
   /* check if melt operation was really too expensive given history */
   if (GNUNET_OK !=