From cfa75ed36c47a1180f338bf52c8c91544bcd8a9d Mon Sep 17 00:00:00 2001
From: Leonid Logvinov <logvinov.leon@gmail.com>
Date: Fri, 6 Oct 2017 13:09:14 +0300
Subject: Add a comment

---
 src/utils/filter_utils.ts | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src')

diff --git a/src/utils/filter_utils.ts b/src/utils/filter_utils.ts
index 2bd745815..c056467c7 100644
--- a/src/utils/filter_utils.ts
+++ b/src/utils/filter_utils.ts
@@ -43,6 +43,7 @@ export const filterUtils = {
                 continue;
             }
             if (_.isUndefined(indexFilterValues[eventInput.name])) {
+                // Null is a wildcard topic in a JSON-RPC call
                 topics.push(null);
             } else {
                 const value = indexFilterValues[eventInput.name] as string;
-- 
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