feat: add base maintenance warning

Author: tienkane

apps/kyberswap-interface/src/pages/Earns/PoolExplorer/index.tsx

@@ -1,3 +1,4 @@
+import { ChainId } from '@kyberswap/ks-sdk-core'
 import { t } from '@lingui/macro'
 import { useCallback, useEffect, useState } from 'react'
 import { useNavigate, useSearchParams } from 'react-router-dom'
@@ -58,6 +59,10 @@ const PoolExplorer = () => {
   const { data: poolData, isError } = usePoolsExplorerQuery(filters, { pollingInterval: POLLING_INTERVAL })
 
   const upToLarge = useMedia(`(max-width: ${MEDIA_WIDTHS.upToLarge}px)`)
+  // const nowMs = Date.now()
+  // const MAINTENANCE_END_UTC_MS = Date.UTC(2025, 10, 20, 1, 0, 0) // 1:00 AM UTC, 20 Nov 2025
+  // const MAINTENANCE_START_UTC_MS = MAINTENANCE_END_UTC_MS - 2 * 60 * 60 * 1000 // 2 hours before
+  // const isWithinMaintenanceWindow = nowMs >= MAINTENANCE_START_UTC_MS && nowMs <= MAINTENANCE_END_UTC_MS
 
   const onSortChange = (sortBy: string) => {
     if (!filters.sortBy || filters.sortBy !== sortBy) {
@@ -180,6 +185,12 @@ const PoolExplorer = () => {
       </div>
 
       <Filter filters={filters} updateFilters={updateFilters} search={search} setSearch={setSearch} />
+      {filters.chainId === ChainId.BASE && (
+        <Text color={theme.subText} fontSize={12} fontStyle={'italic'}>
+          Kyber Earn data on Base is being updated. This may take a moment and will be available again at 1:00 AM UTC on
+          20 Nov 2025 — thank you for your patience.
+        </Text>
+      )}
 
       {upToLarge && (
         <NavigateButton

apps/kyberswap-interface/src/pages/Earns/UserPositions/index.tsx

@@ -1,3 +1,4 @@
+import { ChainId } from '@kyberswap/ks-sdk-core'
 import { Trans, t } from '@lingui/macro'
 import { useEffect, useMemo, useRef, useState } from 'react'
 import { useNavigate } from 'react-router-dom'
@@ -380,6 +381,13 @@ const UserPositions = () => {
           }}
         />
 
+        {filters.chainIds?.split(',').includes(ChainId.BASE.toString()) && (
+          <Text color={theme.subText} fontSize={12} fontStyle={'italic'}>
+            Kyber Earn data on Base is being updated. This may take a moment and will be available again at 1:00 AM UTC
+            on 20 Nov 2025 — thank you for your patience.
+          </Text>
+        )}
+
         <PositionTableWrapper>
           <ContentWrapper>
             {!upToCustomLarge && paginatedPositions && paginatedPositions.length > 0 && (