From 4755541b711d3b19af00780e26be0c91223842cc Mon Sep 17 00:00:00 2001
From: Ukaykhingmarma28 <ukaykhingmarma28@gmail.com>
Date: Mon, 3 Feb 2025 13:31:12 +0600
Subject: hash change

---
 index.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

(limited to 'index.js')

diff --git a/index.js b/index.js
index 017c4c8..d9ba827 100644
--- a/index.js
+++ b/index.js
@@ -49,8 +49,8 @@ async function connectDB() {
 
 connectDB();
 
-function generateSerialNumber() {
-    return `Jadupc${crypto.randomInt(100000, 999999)}`;
+function generateSerialNumber(mac) {
+    return `JPC${crypto.createHash('sha3-224').update(mac).digest('hex').toUpperCase().substring(0, 6)}`;
 }
 
 app.post('/upload', async (req, res) => {
@@ -67,10 +67,10 @@ app.post('/upload', async (req, res) => {
         const existingDevice = await collection.findOne({ mac });
   
         if (existingDevice) {
-            return res.status(400).send('Device with the same MAC address is already registered');
+            return res.status(400).send(`Device with the same MAC address is already registered, ${existingDevice.serialNumber}`);
         }
 
-        const serialNumber = generateSerialNumber();
+        const serialNumber = generateSerialNumber(mac);
   
         const newItem = {
             serialNumber,
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