From bd197037c02df63bd81b6289ecbd8769111ae7b9 Mon Sep 17 00:00:00 2001
From: ST-DDT <ST-DDT@gmx.de>
Date: Mon, 23 Oct 2023 08:52:10 +0200
Subject: chore: substrings of length one (#2496)

---
 src/modules/helpers/luhn-check.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/modules')

diff --git a/src/modules/helpers/luhn-check.ts b/src/modules/helpers/luhn-check.ts
index ba68b41d..42fbe1a5 100644
--- a/src/modules/helpers/luhn-check.ts
+++ b/src/modules/helpers/luhn-check.ts
@@ -28,7 +28,7 @@ function luhnChecksum(str: string): number {
   let sum = 0;
   let alternate = false;
   for (let i = str.length - 1; i >= 0; i--) {
-    let n = Number.parseInt(str.substring(i, i + 1));
+    let n = Number.parseInt(str[i]);
     if (alternate) {
       n *= 2;
       if (n > 9) {
-- 
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