fix(money): correct mUSD casing and list it first on Monad in FAQs (MUSD-1158)

app/components/UI/Money/selectors/featureFlags.test.ts

@@ -912,8 +912,8 @@ describe('selectMoneyNoFeeDepositTokens', () => {
     expect(result['0x38']).toEqual(
       expect.arrayContaining(['USDC', 'aUSDC', 'aUSDT', 'USDT']),
     );
-    expect(result['0xe708']).toEqual(['MUSD']);
-    expect(result['0x8f']).toEqual(['USDC', 'MUSD']);
+    expect(result['0xe708']).toEqual(['mUSD']);
+    expect(result['0x8f']).toEqual(['mUSD', 'USDC']);
   });
 
   it('lists Monad mUSD even though no route emits a Monad mUSD -> Monad mUSD deposit', () => {
@@ -923,7 +923,7 @@ describe('selectMoneyNoFeeDepositTokens', () => {
 
     const result = selectMoneyNoFeeDepositTokens(state as never);
 
-    expect(result['0x8f']).toContain('MUSD');
+    expect(result['0x8f']).toContain('mUSD');
   });
 
   it('deduplicates symbols within a chain', () => {

app/components/UI/Money/selectors/featureFlags.ts

@@ -8,7 +8,10 @@ import {
 } from '../../../../util/remoteFeatureFlag';
 import { isMoneyAccountEnabled } from '../../../../lib/Money/feature-flags';
 import { WildcardTokenList } from '../../Earn/utils/wildcardTokenList';
-import { MUSD_TOKEN_ADDRESS } from '../../Earn/constants/musd';
+import {
+  MUSD_TOKEN_ADDRESS,
+  getTokenDisplaySymbol,
+} from '../../Earn/constants/musd';
 import {
   MONEY_NO_FEE_TOKENS_FALLBACK,
   ensureMonadMusdListed,
@@ -182,6 +185,9 @@ const AAVE_TOKEN_ALIASES = new Set(['ausdc', 'ausdt', 'adai', 'ausdcn']);
  * - Strip the chain prefix ("eth_usdc" → "usdc")
  * - Known aave tokens (see AAVE_TOKEN_ALIASES): "ausdc" → "aUSDC"
  * - All others: full uppercase ("usdc" → "USDC")
+ *
+ * mUSD casing is handled by address via getTokenDisplaySymbol at the call
+ * site, not by alias here.
  */
 const normalizeTokenSymbol = (tokenAlias: string): string => {
   const underscoreIdx = tokenAlias.indexOf('_');
@@ -232,7 +238,9 @@ export const selectMoneyNoFeeDepositTokens = createSelector(
       }
 
       const srcChainHex = route.sourceChain.toLowerCase();
-      const symbol = normalizeTokenSymbol(route.sourceTokenAlias);
+      const normalized = normalizeTokenSymbol(route.sourceTokenAlias);
+      const symbol =
+        getTokenDisplaySymbol(route.sourceToken, normalized) ?? normalized;
 
       if (!catalog[srcChainHex]) catalog[srcChainHex] = [];
       if (!catalog[srcChainHex].includes(symbol)) {

app/components/UI/Money/utils/depositFaqTokens.test.ts

@@ -7,25 +7,33 @@ import {
 
 describe('depositFaqTokens', () => {
   describe('ensureMonadMusdListed', () => {
-    it('appends MUSD after existing Monad tokens', () => {
+    it('prepends mUSD before existing Monad tokens', () => {
       expect(
         ensureMonadMusdListed({ [CHAIN_IDS.MONAD]: ['USDC'] })[CHAIN_IDS.MONAD],
-      ).toEqual(['USDC', 'MUSD']);
+      ).toEqual(['mUSD', 'USDC']);
     });
 
     it('adds a Monad entry when the chain is absent', () => {
       expect(ensureMonadMusdListed({ '0x1': ['USDC'] })).toEqual({
         '0x1': ['USDC'],
-        [CHAIN_IDS.MONAD]: ['MUSD'],
+        [CHAIN_IDS.MONAD]: ['mUSD'],
       });
     });
 
-    it('does not duplicate MUSD when already present', () => {
+    it('moves mUSD to the front when present but not first', () => {
       expect(
-        ensureMonadMusdListed({ [CHAIN_IDS.MONAD]: ['USDC', 'MUSD'] })[
+        ensureMonadMusdListed({ [CHAIN_IDS.MONAD]: ['USDC', 'mUSD'] })[
           CHAIN_IDS.MONAD
         ],
-      ).toEqual(['USDC', 'MUSD']);
+      ).toEqual(['mUSD', 'USDC']);
+    });
+
+    it('does not duplicate mUSD when already first', () => {
+      expect(
+        ensureMonadMusdListed({ [CHAIN_IDS.MONAD]: ['mUSD', 'USDC'] })[
+          CHAIN_IDS.MONAD
+        ],
+      ).toEqual(['mUSD', 'USDC']);
     });
 
     it('does not mutate the input list', () => {
@@ -39,8 +47,8 @@ describe('depositFaqTokens', () => {
     it('formats each chain as a bullet line with a friendly network name', () => {
       expect(formatNoFeeTokenBullets(MONEY_NO_FEE_TOKENS_FALLBACK)).toBe(
         [
-          '• Ethereum: USDC, aUSDC, USDT, aUSDT, DAI, aDAI, MUSD',
-          '• Linea: MUSD',
+          '• Ethereum: USDC, aUSDC, USDT, aUSDT, DAI, aDAI, mUSD',
+          '• Linea: mUSD',
           '• Arbitrum: USDC, aUSDCN',
           '• Base: USDC, aUSDC',
           '• BNB Chain: USDC, aUSDC, aUSDT, USDT',

app/components/UI/Money/utils/depositFaqTokens.ts

@@ -1,17 +1,18 @@
 import { CHAIN_IDS } from '@metamask/transaction-controller';
 import { NETWORK_TO_NAME_MAP } from '../../../../core/Engine/constants';
 import { WildcardTokenList } from '../../Earn/utils/wildcardTokenList';
+import { MUSD_TOKEN } from '../../Earn/constants/musd';
 
 const NETWORK_NAMES = NETWORK_TO_NAME_MAP as Record<string, string>;
 
 /** Display symbol for mUSD in the FAQ no-fee list. */
-const MUSD_SYMBOL = 'MUSD';
+const MUSD_SYMBOL = MUSD_TOKEN.symbol;
 
 /**
  * Monad mUSD -> Monad mUSD needs no swap or bridge, so the relay fixed-spread
  * flag omits it from its routes; depositing Monad mUSD still incurs no fee, so
- * the FAQ lists it explicitly alongside the route-derived tokens. Mirrors the
- * `isMonadMusd` no-fee edge case in useMoneyEarnableTokens.
+ * the FAQ lists it explicitly, first, ahead of the route-derived tokens.
+ * Mirrors the `isMonadMusd` no-fee edge case in useMoneyEarnableTokens.
  *
  * Returns a new list and never mutates the input (the input may be the shared
  * MONEY_NO_FEE_TOKENS_FALLBACK constant).
@@ -20,10 +21,16 @@ export const ensureMonadMusdListed = (
   list: WildcardTokenList,
 ): WildcardTokenList => {
   const monadTokens = list[CHAIN_IDS.MONAD] ?? [];
-  if (monadTokens.includes(MUSD_SYMBOL)) {
+  if (monadTokens[0] === MUSD_SYMBOL) {
     return list;
   }
-  return { ...list, [CHAIN_IDS.MONAD]: [...monadTokens, MUSD_SYMBOL] };
+  return {
+    ...list,
+    [CHAIN_IDS.MONAD]: [
+      MUSD_SYMBOL,
+      ...monadTokens.filter((symbol) => symbol !== MUSD_SYMBOL),
+    ],
+  };
 };
 
 export const MONEY_NO_FEE_TOKENS_FALLBACK: WildcardTokenList = {
@@ -34,9 +41,9 @@ export const MONEY_NO_FEE_TOKENS_FALLBACK: WildcardTokenList = {
     'aUSDT',
     'DAI',
     'aDAI',
-    'MUSD',
+    'mUSD',
   ],
-  [CHAIN_IDS.LINEA_MAINNET]: ['MUSD'],
+  [CHAIN_IDS.LINEA_MAINNET]: ['mUSD'],
   [CHAIN_IDS.ARBITRUM]: ['USDC', 'aUSDCN'],
   [CHAIN_IDS.BASE]: ['USDC', 'aUSDC'],
   [CHAIN_IDS.BSC]: ['USDC', 'aUSDC', 'aUSDT', 'USDT'],