feat(earn): add geo-blocking for mUSD conversion feature

.js.env.example

@@ -120,6 +120,9 @@ export MM_MUSD_CONVERSION_ASSET_OVERVIEW_CTA="false"
 # CTA displayed in token list item ("Convert to mUSD")
 export MM_MUSD_CONVERSION_TOKEN_LIST_ITEM_CTA="false"
 export MM_MUSD_CONVERSION_REWARDS_UI_ENABLED="false"
+# Geo-blocked countries for mUSD conversion (comma-separated ISO 3166-1 alpha-2 codes)
+# LaunchDarkly takes precedence; this is a fallback. Default blocks UK.
+export MM_MUSD_CONVERSION_GEO_BLOCKED_COUNTRIES="GB"
 
 # Activates remote feature flag override mode.
 # Remote feature flag values won't be updated,

app/components/UI/Earn/components/EarnBalance/EarnBalance.test.tsx

@@ -7,6 +7,7 @@ import EarnLendingBalance from '../EarnLendingBalance';
 import { selectTrxStakingEnabled } from '../../../../../selectors/featureFlagController/trxStakingEnabled';
 import { selectTronResourcesBySelectedAccountGroup } from '../../../../../selectors/assets/assets-list';
 import TronStakingButtons from '../Tron/TronStakingButtons';
+import { selectIsMusdConversionFlowEnabledFlag } from '../../selectors/featureFlags';
 
 /**
  * We mock underlying components because we only care about the conditional rendering.
@@ -83,17 +84,49 @@ jest.mock('../EarnLendingBalance', () => ({
   default: jest.fn(),
 }));
 
+import { useMusdConversionTokens } from '../../hooks/useMusdConversionTokens';
+
 jest.mock('../../hooks/useMusdConversionTokens', () => ({
   __esModule: true,
   useMusdConversionTokens: jest.fn().mockReturnValue({
     isConversionToken: jest.fn().mockReturnValue(false),
-    tokenFilter: jest.fn(),
+    filterAllowedTokens: jest.fn(),
     tokens: [],
     isMusdSupportedOnChain: jest.fn().mockReturnValue(false),
     getMusdOutputChainId: jest.fn().mockReturnValue('0x1'),
   }),
 }));
 
+const mockUseMusdConversionTokens =
+  useMusdConversionTokens as jest.MockedFunction<
+    typeof useMusdConversionTokens
+  >;
+
+jest.mock('../../selectors/featureFlags', () => ({
+  ...jest.requireActual('../../selectors/featureFlags'),
+  selectIsMusdConversionFlowEnabledFlag: jest.fn().mockReturnValue(false),
+}));
+
+const mockSelectIsMusdConversionFlowEnabledFlag =
+  selectIsMusdConversionFlowEnabledFlag as jest.MockedFunction<
+    typeof selectIsMusdConversionFlowEnabledFlag
+  >;
+
+import { useMusdConversionEligibility } from '../../hooks/useMusdConversionEligibility';
+
+jest.mock('../../hooks/useMusdConversionEligibility', () => ({
+  useMusdConversionEligibility: jest.fn().mockReturnValue({
+    isEligible: true,
+    geolocation: 'US',
+    blockedCountries: [],
+  }),
+}));
+
+const mockUseMusdConversionEligibility =
+  useMusdConversionEligibility as jest.MockedFunction<
+    typeof useMusdConversionEligibility
+  >;
+
 jest.mock('../../hooks/useTronStakeApy', () => ({
   __esModule: true,
   default: jest.fn().mockReturnValue({
@@ -252,4 +285,64 @@ describe('EarnBalance', () => {
       expect(props.hasStakedPositions).toBe(true);
     });
   });
+
+  describe('Geo-blocking', () => {
+    it('does not render EarnLendingBalance for convertible stablecoin when user is geo-blocked', () => {
+      mockSelectIsMusdConversionFlowEnabledFlag.mockReturnValue(true);
+
+      mockUseMusdConversionTokens.mockReturnValue({
+        isConversionToken: jest.fn().mockReturnValue(true),
+        filterAllowedTokens: jest.fn(),
+        tokens: [],
+        isMusdSupportedOnChain: jest.fn().mockReturnValue(true),
+        getMusdOutputChainId: jest.fn().mockReturnValue('0x1'),
+      });
+
+      mockUseMusdConversionEligibility.mockReturnValue({
+        isEligible: false,
+        geolocation: 'GB',
+        blockedCountries: ['GB'],
+      });
+
+      const mockDai = {
+        isETH: false,
+        symbol: 'DAI',
+        chainId: '0x1',
+      };
+
+      renderWithProvider(<EarnBalance asset={mockDai as unknown as TokenI} />);
+
+      // EarnLendingBalance should not be called because geo-blocking is active
+      expect(EarnLendingBalance).not.toHaveBeenCalled();
+    });
+
+    it('renders EarnLendingBalance for convertible stablecoin when user is geo-eligible', () => {
+      mockSelectIsMusdConversionFlowEnabledFlag.mockReturnValue(true);
+
+      mockUseMusdConversionTokens.mockReturnValue({
+        isConversionToken: jest.fn().mockReturnValue(true),
+        filterAllowedTokens: jest.fn(),
+        tokens: [],
+        isMusdSupportedOnChain: jest.fn().mockReturnValue(true),
+        getMusdOutputChainId: jest.fn().mockReturnValue('0x1'),
+      });
+
+      mockUseMusdConversionEligibility.mockReturnValue({
+        isEligible: true,
+        geolocation: 'US',
+        blockedCountries: [],
+      });
+
+      const mockDai = {
+        isETH: false,
+        symbol: 'DAI',
+        chainId: '0x1',
+      };
+
+      renderWithProvider(<EarnBalance asset={mockDai as unknown as TokenI} />);
+
+      // EarnLendingBalance should be called because user is geo-eligible
+      expect(EarnLendingBalance).toHaveBeenCalled();
+    });
+  });
 });

app/components/UI/Earn/components/EarnBalance/index.tsx

@@ -14,6 +14,7 @@ import { hasStakedTrxPositions as hasStakedTrxPositionsUtil } from '../../utils/
 import useTronStakeApy from '../../hooks/useTronStakeApy';
 ///: END:ONLY_INCLUDE_IF
 import { useMusdConversionTokens } from '../../hooks/useMusdConversionTokens';
+import { useMusdConversionEligibility } from '../../hooks/useMusdConversionEligibility';
 import { selectIsMusdConversionFlowEnabledFlag } from '../../selectors/featureFlags';
 export interface EarnBalanceProps {
   asset: TokenI;
@@ -36,6 +37,7 @@ const EarnBalance = ({ asset }: EarnBalanceProps) => {
   );
 
   const { isConversionToken } = useMusdConversionTokens();
+  const { isEligible: isGeoEligible } = useMusdConversionEligibility();
   ///: BEGIN:ONLY_INCLUDE_IF(tron)
   const isTrxStakingEnabled = useSelector(selectTrxStakingEnabled);
 
@@ -74,7 +76,7 @@ const EarnBalance = ({ asset }: EarnBalanceProps) => {
   ///: END:ONLY_INCLUDE_IF
 
   const isConvertibleStablecoin =
-    isMusdConversionFlowEnabled && isConversionToken(asset);
+    isMusdConversionFlowEnabled && isConversionToken(asset) && isGeoEligible;
 
   // EVM staking: only when stakeable and not a staked output token
   if (isStakeableToken && !asset.isStaked) {

app/components/UI/Earn/components/EarnLendingBalance/EarnLendingBalance.test.tsx

@@ -23,6 +23,7 @@
 import { useMusdConversionTokens } from '../../hooks/useMusdConversionTokens';
 import { EARN_TEST_IDS } from '../../constants/testIds';
 import useStakingEligibility from '../../../Stake/hooks/useStakingEligibility';
+import { useMusdConversionEligibility } from '../../hooks/useMusdConversionEligibility';
 
 const mockNavigate = jest.fn();
 const mockDaiMainnet: EarnTokenDetails = {
@@ -150,6 +151,14 @@
   typeof useStakingEligibility
 >;
 
+jest.mock('../../hooks/useMusdConversionEligibility', () => ({
+  useMusdConversionEligibility: jest.fn().mockReturnValue({
+    isEligible: true,
+    geolocation: 'US',
+    blockedCountries: [],
+  }),
+}));
+
 jest.mock('../../selectors/featureFlags', () => ({
   selectIsMusdConversionFlowEnabledFlag: jest.fn(),
   selectPooledStakingEnabledFlag: jest.fn(),
@@ -727,4 +736,90 @@
     ).toBeOnTheScreen();
     expect(queryByTestId(EARN_EMPTY_STATE_CTA_TEST_ID)).toBeNull();
   });
+
+  it('hides mUSD conversion CTA when user is geo-blocked', () => {
+    const mockEmptyReceiptToken = {
+      ...mockADAIMainnet,
+      balanceMinimalUnit: '0',
+      balanceFormatted: '0 ADAI',
+      balanceFiatNumber: 0,
+    };
+
+    (
+      earnSelectors.selectEarnTokenPair as jest.MockedFunction<
+        typeof earnSelectors.selectEarnTokenPair
+      >
+    ).mockReturnValue({
+      outputToken: mockEmptyReceiptToken,
+      earnToken: mockDaiMainnet,
+    });
+
+    (
+      selectStablecoinLendingEnabledFlag as jest.MockedFunction<
+        typeof selectStablecoinLendingEnabledFlag
+      >
+    ).mockReturnValue(false);
+
+    (
+      selectIsMusdConversionFlowEnabledFlag as jest.MockedFunction<
+        typeof selectIsMusdConversionFlowEnabledFlag
+      >
+    ).mockReturnValue(true);
+
+    // Geo-blocked: shouldShowAssetOverviewCta returns false
+    mockShouldShowAssetOverviewCta.mockReturnValue(false);
+
+    const { queryByTestId } = renderWithProvider(
+      <EarnLendingBalance asset={mockDaiMainnet} />,
+      { state: mockInitialState },
+    );
+
+    // mUSD CTA hidden because geo-blocked (useMusdCtaVisibility returns false)
+    expect(
+      queryByTestId(EARN_TEST_IDS.MUSD.ASSET_OVERVIEW_CONVERSION_CTA),
+    ).toBeNull();
+  });
+
+  it('shows mUSD conversion CTA when user is geo-eligible', () => {
+    const mockEmptyReceiptToken = {
+      ...mockADAIMainnet,
+      balanceMinimalUnit: '0',
+      balanceFormatted: '0 ADAI',
+      balanceFiatNumber: 0,
+    };
+
+    (
+      earnSelectors.selectEarnTokenPair as jest.MockedFunction<
+        typeof earnSelectors.selectEarnTokenPair
+      >
+    ).mockReturnValue({
+      outputToken: mockEmptyReceiptToken,
+      earnToken: mockDaiMainnet,
+    });
+
+    (
+      selectStablecoinLendingEnabledFlag as jest.MockedFunction<
+        typeof selectStablecoinLendingEnabledFlag
+      >
+    ).mockReturnValue(false);
+
+    (
+      selectIsMusdConversionFlowEnabledFlag as jest.MockedFunction<
+        typeof selectIsMusdConversionFlowEnabledFlag
+      >
+    ).mockReturnValue(true);
+
+    // Geo-eligible: shouldShowAssetOverviewCta returns true
+    mockShouldShowAssetOverviewCta.mockReturnValue(true);
+
+    const { getByTestId } = renderWithProvider(
+      <EarnLendingBalance asset={mockDaiMainnet} />,
+      { state: mockInitialState },
+    );
+
+    // mUSD CTA visible because geo-eligible (useMusdCtaVisibility returns true)
+    expect(
+      getByTestId(EARN_TEST_IDS.MUSD.ASSET_OVERVIEW_CONVERSION_CTA),
+    ).toBeOnTheScreen();
+  });
 });

app/components/UI/Earn/constants/musd.ts

@@ -41,3 +41,9 @@ export const MUSD_TOKEN_ASSET_ID_BY_CHAIN: Record<Hex, string> = {
 
 export const MUSD_CURRENCY = 'MUSD';
 export const MUSD_CONVERSION_APY = 3;
+
+/**
+ * Default blocked countries for mUSD conversion when no remote or env config is available.
+ * This is a safety fallback to ensure geo-blocking is always active.
+ */
+export const DEFAULT_MUSD_BLOCKED_COUNTRIES = ['GB'];