feat: $GAIN token warning (#12366)

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<!-- start pr-codex -->

---

## PR-Codex overview
This PR introduces the `GAIN` token to the BSC token configuration and
adds a warning modal for it, highlighting recent security issues.

### Detailed summary
- Added `GAIN` token to `bsc.ts` with its details.
- Updated `swapWarningTokens.ts` to include `GAIN`.
- Imported `GAINWarning` in `index.tsx`.
- Added `GAIN` to the `SwapWarningTokensConfig`.
- Created `GAINWarning.tsx` with a caution message regarding the token's
security compromise.

> ✨ Ask PR-Codex anything about this PR by commenting with `/codex {your
question}`

<!-- end pr-codex -->

Author: thechefpenguin

apps/web/src/config/constants/swapWarningTokens.ts

@@ -5,7 +5,7 @@ import { baseWarningTokens } from 'config/constants/warningTokens/baseWarningTok
 import { bscWarningTokens } from 'config/constants/warningTokens/bscWarningTokens'
 
 const { alETH } = ethereumTokens
-const { bondly, itam, ccar, bttold, abnbc, metis } = bscTokens
+const { bondly, itam, ccar, bttold, abnbc, metis, gain } = bscTokens
 const { pokemoney, free, safemoon, gala, xcad, lusd, nfp, pundiai } = bscWarningTokens
 const { usdPlus } = zksyncTokens
 const { ath } = baseWarningTokens
@@ -35,6 +35,7 @@ const SwapWarningTokens = <WarningTokenList>{
     lusd,
     nfp,
     pundiai,
+    gain,
   },
   [ChainId.ZKSYNC]: {
     usdPlus,

apps/web/src/views/Swap/components/SwapWarningModal/bsc/GAINWarning.tsx

@@ -0,0 +1,28 @@
+import { Box, Link, Text } from '@pancakeswap/uikit'
+import { useTranslation, Trans } from '@pancakeswap/localization'
+
+const GAINWarning = () => {
+  const { t } = useTranslation()
+
+  return (
+    <Box maxWidth="380px">
+      <Text>{t('Caution - GAIN Token')}</Text>
+      <Text>
+        <Trans
+          i18nKey="Please exercise due caution when trading / providing liquidity for the GAIN token. The protocol recently encountered a <0>security compromise.</0> For more information, please refer to <1>GriffinAI X</1>"
+          components={[
+            <Link
+              external
+              m="0 4px"
+              style={{ display: 'inline' }}
+              href="https://x.com/Griffin_AI/status/1971049192245047677"
+            />,
+            <Link external ml="4px" style={{ display: 'inline' }} href="https://x.com/Griffin_AI" />,
+          ]}
+        />
+      </Text>
+    </Box>
+  )
+}
+
+export default GAINWarning

apps/web/src/views/Swap/components/SwapWarningModal/bsc/index.tsx

@@ -14,8 +14,9 @@ import PUNDIAIWarning from './PUNDIAIWarning'
 import RugPullWarning from './RugPullWarning'
 import SafemoonWarning from './SafemoonWarning'
 import XCADWarning from './XCADWarning'
+import GAINWarning from './GAINWarning'
 
-const { safemoon, bondly, itam, ccar, bttold, pokemoney, free, gala, abnbc, xcad, metis, lusd, nfp, pundiai } =
+const { safemoon, bondly, itam, ccar, bttold, pokemoney, free, gala, abnbc, xcad, metis, lusd, nfp, pundiai, gain } =
   SwapWarningTokensConfig[ChainId.BSC]
 
 const BSC_WARNING_LIST = {
@@ -75,6 +76,10 @@ const BSC_WARNING_LIST = {
     symbol: pundiai.symbol,
     component: <PUNDIAIWarning />,
   },
+  [gain.address]: {
+    symbol: gain.symbol,
+    component: <GAINWarning />,
+  },
 }
 
 export default BSC_WARNING_LIST

packages/tokens/src/constants/bsc.ts

@@ -3373,4 +3373,5 @@ export const bscTokens = {
   brm: new ERC20Token(ChainId.BSC, '0x483d83A361A3cCE99f88BC05fB44C27B6cE0633b', 18, 'BRM', ''),
   susdx: new ERC20Token(ChainId.BSC, '0x7788A3538C5fc7F9c7C8A74EAC4c898fC8d87d92', 18, 'sUSDX', 'Staked USDX', ''),
   usdx: new ERC20Token(ChainId.BSC, '0xf3527ef8dE265eAa3716FB312c12847bFBA66Cef', 18, 'USDX', 'USDX', ''),
+  gain: new ERC20Token(ChainId.BSC, '0xAcf5A368eC5bb9e804C8AC0b508dAA5A21C92e13', 18, 'GAIN', 'GriffinAI', ''),
 }