Check valid referral code

src/pages/App.tsx

@@ -48,7 +48,7 @@ import { setJumpTaskState } from 'state/jumpTask'
 import { CHAINS } from 'components/Web3Provider/constants'
 const Launchpad = lazy(() => import('pages/Launchpad'))
 import KYC from 'pages/KYC'
-import { isLineLiff } from 'utils'
+import { isLineLiff, isValidReferralCode } from 'utils'
 import { useLiff } from './LiffProvider'
 import TaskSuccessModal from 'components/Rewards/TaskSuccessModal'
 import { useLineReward } from 'providers/LineRewardProvider'
@@ -259,6 +259,11 @@ export default function App() {
     if (!code) {
       return
     }
+
+    if (!isValidReferralCode(code)) {
+      return
+    }
+
     const storedReferralCode = localStorage.getItem('referralCode')
     if (!storedReferralCode) {
       localStorage.setItem('referralCode', code)

src/utils/index.ts

@@ -186,3 +186,9 @@ export function tryClearIndexedDB() {
 
 export const isLineLiff =
   window.location.hostname.includes('line-liff.ixswap.io') || window.location.hostname.includes('localhost')
+
+export const isValidReferralCode = (code: string) => {
+  // Define the regex pattern for 6 characters, only alphabets and digits
+  const pattern = /^[A-Za-z0-9]{6}$/
+  return pattern.test(code)
+}