diff --git a/webapp/events/ConsumeProduct.php b/webapp/events/ConsumeProduct.php
index f08726b4..0de71770 100644
--- a/webapp/events/ConsumeProduct.php
+++ b/webapp/events/ConsumeProduct.php
@@ -12,6 +12,7 @@ class ConsumeProduct
 
     public static function onGoldConsume($params){
         myself()->_callServiceStatic('HashRateService', 'onSpendGold', $params);
+        myself()->_callServiceStatic('ContributionService', 'onGoldConsume', $params);
     }
 
-}
\ No newline at end of file
+}
diff --git a/webapp/services/ContributionService.php b/webapp/services/ContributionService.php
new file mode 100644
index 00000000..c289982d
--- /dev/null
+++ b/webapp/services/ContributionService.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace services;
+
+class ContributionService extends BaseService {
+
+    private static $ignoreCa = array(
+        'BlockChain@mintGoldBullion',
+    );
+
+    public static function onGoldConsume($params) {
+        $ca = getReqVal('c', '') . '@' . getReqVal('a');
+        if (array_key_exists($ca, self::$ignoreCa)) {
+            return;
+        }
+    }
+
+}