Merge remote-tracking branch 'origin/main' into kureev/MUSD-716

# Conflicts:
#	app/components/UI/Money/Views/MoneyHomeView/MoneyHomeView.test.tsx
#	app/components/UI/Money/Views/MoneyHomeView/MoneyHomeView.tsx

Author: Kureev

.agents/skills/e2e-test/SKILL.md

@@ -66,7 +66,7 @@ Do not read the full reference files until the decision tree or workflow sends y
 5. **Never use `TestHelpers.delay()`** — use `Assertions.*` which has auto-retry
 6. **Use `FixtureBuilder` for state** — do not set state through UI interactions
 7. **Selectors live in `*.testIds.ts`** (co-located) or `tests/selectors/` (legacy)
-8. **Tag correctly** — Use the tag that matches your feature and test type. Options include `SmokeE2E`, `SmokeTrade`, `SmokePredictions`, `SmokePerps`, `SmokeConfirmations`, `RegressionTrade`, `RegressionWallet`, etc. Check **`tests/tags.js`** for the full list and descriptions, and **existing specs in the same feature folder** to see which tag they use.
+8. **Tag correctly** — Use the tag that matches your feature and test type. Options include `SmokeE2E`, `SmokeSwap`, `SmokeStake`, `SmokeMoney`, `SmokePredictions`, `SmokePerps`, `SmokeConfirmations`, `RegressionTrade`, `RegressionWallet`, etc. Check **`tests/tags.js`** for the full list and descriptions, and **existing specs in the same feature folder** to see which tag they use.
 9. **Descriptive test names** — no 'should' prefix (e.g., `'opens market details'`)
 10. **Fix lint/tsc before running** — never run with known errors
 

.agents/skills/e2e-test/references/writing-tests.md

@@ -2,12 +2,12 @@
 
 ## Spec File Location
 
-| Test Type  | Directory                                   | Tag                                                                                    |
-| ---------- | ------------------------------------------- | -------------------------------------------------------------------------------------- |
-| Smoke      | `tests/smoke/<feature>/<name>.spec.ts`      | `SmokeE2E`, `SmokeTrade`, `SmokePredictions`, `SmokePerps`, `SmokeConfirmations`, etc. |
-| Regression | `tests/regression/<feature>/<name>.spec.ts` | `RegressionTrade`, `RegressionWallet`, etc.                                            |
+| Test Type  | Directory                                   | Tag                                                                                                               |
+| ---------- | ------------------------------------------- | ----------------------------------------------------------------------------------------------------------------- |
+| Smoke      | `tests/smoke/<feature>/<name>.spec.ts`      | `SmokeE2E`, `SmokeSwap`, `SmokeStake`, `SmokeMoney`, `SmokePredictions`, `SmokePerps`, `SmokeConfirmations`, etc. |
+| Regression | `tests/regression/<feature>/<name>.spec.ts` | `RegressionTrade`, `RegressionWallet`, etc.                                                                       |
 
-Import tags from `tests/tags.ts`. Check **`tests/tags.js`** for the full list and descriptions. Use the same tag as **existing specs in that feature folder** (e.g. `tests/smoke/predict/` uses `SmokeTrade`).
+Import tags from `tests/tags.ts`. Check **`tests/tags.js`** for the full list and descriptions. Use the same tag as **existing specs in that feature folder** (e.g. `tests/smoke/swap/` uses `SmokeSwap`, `tests/smoke/stake/` uses `SmokeStake`, `tests/smoke/card/` and `tests/smoke/ramps/` use `SmokeMoney`).
 
 ## Minimal Smoke Spec
 

.eslintrc.js

@@ -1,4 +1,136 @@
 /* eslint-disable import-x/no-commonjs */
+
+/**
+ * Files still allowed to import deprecated `app/util/number/index.js` during
+ * the BN.js → BigInt migration. Kept in one array so the default import-fence
+ * override can exclude them while the follow-up override below re-applies only
+ * the expo-haptics / perps restrictions (see comments on those overrides).
+ */
+const utilNumberImportBurndownFiles = [
+  'app/component-library/components-temp/CustomSpendCap/CustomInput/CustomInput.tsx',
+  'app/component-library/components-temp/CustomSpendCap/CustomSpendCap.tsx',
+  'app/component-library/components-temp/Price/AggregatedPercentage/AggregatedPercentage.tsx',
+  'app/component-library/components-temp/Price/AggregatedPercentage/utils.ts',
+  'app/components/UI/AccountInfoCard/index.js',
+  'app/components/UI/AssetOverview/Price/Price.advanced.tsx',
+  'app/components/UI/AssetOverview/Price/Price.legacy.tsx',
+  'app/components/UI/AssetOverview/utils/marketDetails.ts',
+  'app/components/UI/Bridge/components/QuoteSelectorView/QuoteRow.tsx',
+  'app/components/UI/Bridge/components/QuoteSelectorView/index.tsx',
+  'app/components/UI/Bridge/hooks/useBridgeQuoteData/index.ts',
+  'app/components/UI/Bridge/hooks/useFormattedBalanceWithThreshold/index.ts',
+  'app/components/UI/Bridge/hooks/useHasSufficientGas/index.ts',
+  'app/components/UI/Bridge/hooks/useInsufficientBalance/index.ts',
+  'app/components/UI/Bridge/hooks/useTokenBalanceInUsd/index.ts',
+  'app/components/UI/Bridge/hooks/useTokensWithBalance/index.ts',
+  'app/components/UI/Bridge/utils/exchange-rates.ts',
+  'app/components/UI/Bridge/utils/formatNetworkFee.test.ts',
+  'app/components/UI/Bridge/utils/formatNetworkFee.ts',
+  'app/components/UI/Bridge/utils/transaction-history.ts',
+  'app/components/UI/Card/hooks/useAssetBalances.tsx',
+  'app/components/UI/Card/hooks/useCardDelegation.test.ts',
+  'app/components/UI/Card/hooks/useCardDelegation.ts',
+  'app/components/UI/Card/hooks/useNeedsGasFaucet.ts',
+  'app/components/UI/Card/sdk/CardSDK.ts',
+  'app/components/UI/CollectibleOverview/index.js',
+  'app/components/UI/Earn/Views/EarnInputView/EarnInputView.test.tsx',
+  'app/components/UI/Earn/Views/EarnLendingDepositConfirmationView/components/Erc20TokenHero/index.tsx',
+  'app/components/UI/Earn/Views/EarnLendingDepositConfirmationView/index.tsx',
+  'app/components/UI/Earn/Views/EarnLendingWithdrawalConfirmationView/index.tsx',
+  'app/components/UI/Earn/Views/EarnWithdrawInputView/EarnWithdrawInputView.tsx',
+  'app/components/UI/Earn/components/EarnLendingBalance/index.tsx',
+  'app/components/UI/Earn/components/Earnings/EarningsHistory/EarningsHistory.utils.ts',
+  'app/components/UI/Earn/components/InputDisplay/InputDisplay.test.tsx',
+  'app/components/UI/Earn/hooks/useEarnGasFee.ts',
+  'app/components/UI/Earn/hooks/useEarnInput.ts',
+  'app/components/UI/Earn/hooks/useEarnings.ts',
+  'app/components/UI/Earn/hooks/useInput.ts',
+  'app/components/UI/Earn/hooks/useMultichainInputHandlers.ts',
+  'app/components/UI/Earn/hooks/useMusdBalance.ts',
+  'app/components/UI/Earn/hooks/useMusdCtaVisibility.ts',
+  'app/components/UI/Earn/utils/number.ts',
+  'app/components/UI/Earn/utils/token/index.ts',
+  'app/components/UI/Earn/utils/tron.ts',
+  'app/components/UI/HardwareWallet/AccountDetails/index.tsx',
+  'app/components/UI/Money/constants/activityStyles.ts',
+  'app/components/UI/Money/hooks/useMoneyAccountBalance.ts',
+  'app/components/UI/Money/utils/moneyActivityFiat.ts',
+  'app/components/UI/MultichainBridgeTransactionListItem/MultichainBridgeTransactionListItem.tsx',
+  'app/components/UI/Notification/TransactionNotification/index.js',
+  'app/components/UI/Ramp/Aggregator/Views/BuildQuote/BuildQuote.test.tsx',
+  'app/components/UI/Ramp/Aggregator/Views/BuildQuote/BuildQuote.tsx',
+  'app/components/UI/Ramp/Aggregator/Views/OrdersList/OrdersList.tsx',
+  'app/components/UI/Ramp/Aggregator/Views/SendTransaction/SendTransaction.tsx',
+  'app/components/UI/Ramp/Aggregator/components/OrderDetails.tsx',
+  'app/components/UI/Ramp/Aggregator/components/OrderListItem/OrderListItem.tsx',
+  'app/components/UI/Ramp/Aggregator/components/Quote/Quote.tsx',
+  'app/components/UI/Ramp/Aggregator/hooks/useBalance.test.ts',
+  'app/components/UI/Ramp/Aggregator/hooks/useBalance.ts',
+  'app/components/UI/Ramp/Aggregator/hooks/useERC20GasLimitEstimation.ts',
+  'app/components/UI/Ramp/Aggregator/hooks/useHandleSuccessfulOrder.ts',
+  'app/components/UI/Ramp/Aggregator/hooks/useIntentAmount.ts',
+  'app/components/UI/Ramp/Aggregator/utils/index.ts',
+  'app/components/UI/Ramp/Deposit/utils/index.ts',
+  'app/components/UI/Ramp/utils/getOrderAmount.ts',
+  'app/components/UI/Ramp/utils/v2OrderToast.ts',
+  'app/components/UI/Stake/components/StakingBalance/StakingBanners/ClaimBanner/ClaimBanner.tsx',
+  'app/components/UI/Stake/components/StakingConfirmation/TokenValueStack/TokenValueStack.test.tsx',
+  'app/components/UI/Stake/components/StakingConfirmation/TokenValueStack/TokenValueStack.tsx',
+  'app/components/UI/Stake/components/StakingConfirmation/YouReceiveCard/YouReceiveCard.test.tsx',
+  'app/components/UI/Stake/components/StakingConfirmation/YouReceiveCard/YouReceiveCard.tsx',
+  'app/components/UI/Stake/hooks/useBalance.ts',
+  'app/components/UI/Tokens/util/deriveBalanceFromAssetMarketDetails.test.ts',
+  'app/components/UI/Tokens/util/deriveBalanceFromAssetMarketDetails.ts',
+  'app/components/UI/TransactionElement/utils-gas.js',
+  'app/components/UI/TransactionElement/utils.js',
+  'app/components/UI/UrlAutocomplete/Result.tsx',
+  'app/components/Views/AssetDetails/index.tsx',
+  'app/components/Views/DetectedTokens/components/Token.tsx',
+  'app/components/Views/GasEducationCarousel/index.js',
+  'app/components/Views/NetworksManagement/NetworkDetailsView/hooks/useNetworkValidation.ts',
+  'app/components/Views/SocialLeaderboard/TraderPositionView/components/QuickBuyBottomSheet/useQuickBuyBottomSheet.ts',
+  'app/components/Views/SocialLeaderboard/TraderPositionView/components/QuickBuyBottomSheet/useQuickBuyQuotes.ts',
+  'app/components/Views/SocialLeaderboard/utils/formatters.ts',
+  'app/components/Views/UnifiedTransactionsView/useUnifiedTxActions.test.ts',
+  'app/components/Views/confirmations/components/gas/max-base-fee-input/max-base-fee-input.tsx',
+  'app/components/Views/confirmations/components/gas/priority-fee-input/priority-fee-input.tsx',
+  'app/components/Views/confirmations/components/info/typed-sign-v3v4/simulation/components/native-value-display/native-value-display.tsx',
+  'app/components/Views/confirmations/components/info/typed-sign-v3v4/simulation/components/value-display/value-display.tsx',
+  'app/components/Views/confirmations/components/transactions/custom-amount/custom-amount.tsx',
+  'app/components/Views/confirmations/context/send-context/utils.ts',
+  'app/components/Views/confirmations/external/staking/hooks/useStakingDetails.ts',
+  'app/components/Views/confirmations/hooks/earn/useCustomAmount.tsx',
+  'app/components/Views/confirmations/hooks/gas/useCancelSpeedupGas/useCancelSpeedupGas.ts',
+  'app/components/Views/confirmations/hooks/send/useBalance.ts',
+  'app/components/Views/confirmations/hooks/send/useCurrencyConversions.ts',
+  'app/components/Views/confirmations/hooks/send/usePercentageAmount.ts',
+  'app/components/Views/confirmations/hooks/useTokenAmount.ts',
+  'app/components/Views/confirmations/legacy/components/CustomNonceModal/index.js',
+  'app/components/Views/confirmations/legacy/components/WatchAssetRequest/index.js',
+  'app/components/Views/confirmations/utils/send.ts',
+  'app/components/hooks/useAddressBalance/useAddressBalance.ts',
+  'app/components/hooks/useGetFormattedTokensPerChain.tsx',
+  'app/components/hooks/useGetTotalFiatBalanceCrossChains.tsx',
+  'app/core/Engine/Engine.ts',
+  'app/core/Engine/controllers/gas-fee-controller/gas-fee-controller-init.test.ts',
+  'app/core/GasPolling/GasPolling.ts',
+  'app/core/NotificationManager.js',
+  'app/selectors/assets/assets-list.ts',
+  'app/selectors/earnController/earn/index.ts',
+  'app/selectors/multichain/evm.ts',
+  // `app/util/**` importers of `./number` or `../number` (resolves to `index.js`);
+  // same burndown contract as feature files — remove when migrated to
+  // `../number/bigint` (or `./number/bigint` from `app/util/`).
+  'app/util/confirm-tx.js',
+  'app/util/conversions.js',
+  'app/util/confirmation/gas.ts',
+  'app/util/confirmation/transactions.ts',
+  'app/util/custom-gas/index.js',
+  'app/util/networks/index.js',
+  'app/util/transactions/index.js',
+  'app/util/transactions/index.test.ts',
+];
+
 module.exports = {
   root: true,
   parser: '@typescript-eslint/parser',
@@ -42,6 +174,11 @@ module.exports = {
           'interface',
         ],
         '@typescript-eslint/no-explicit-any': 'error',
+        // Surface JSDoc @deprecated annotations at every use-site (warn for now;
+        // ratchet to 'error' once the BN.js → BigInt migration is complete).
+        // Pairs with the `import-x/no-restricted-paths` fence on
+        // `app/util/number/index.js` in the app import-fence override below.
+        '@typescript-eslint/no-deprecated': 'warn',
         // Under discussion
         '@typescript-eslint/no-duplicate-enum-values': 'off',
         '@typescript-eslint/no-shadow': [
@@ -466,18 +603,100 @@ module.exports = {
       },
     },
     {
-      files: ['app/**/*.{ts,tsx}'],
-      excludedFiles: ['app/controllers/perps/**/*.{ts,tsx}'],
+      // Default app import fences (expo-haptics, perps, deprecated util/number/index.js).
+      // `excludedFiles` applies to the whole override — listing burn-down paths
+      // here would incorrectly skip expo/perps for those files, so burn-down is
+      // excluded from *this* block only and picked up by the next override.
+      files: ['app/**/*.{ts,tsx,js,jsx}'],
+      excludedFiles: [
+        // Perps controller is exempt from importing itself.
+        'app/controllers/perps/**/*.{ts,tsx,js,jsx}',
+        // Designated expo-haptics wrapper — only this tree may import expo-haptics.
+        'app/util/haptics/**/*.{ts,tsx,js,jsx}',
+        // Legacy number utils + parity tests.
+        'app/util/number/**',
+        // BN.js → BigInt burn-down: still allowed util/number imports; see next override.
+        ...utilNumberImportBurndownFiles,
+      ],
+      rules: {
+        'no-restricted-imports': [
+          'error',
+          {
+            paths: [
+              {
+                name: 'expo-haptics',
+                message:
+                  'Import from app/util/haptics instead of expo-haptics directly.',
+              },
+            ],
+            patterns: [
+              {
+                group: ['**/controllers/perps', '**/controllers/perps/**'],
+                message:
+                  'Use @metamask/perps-controller instead of relative imports into app/controllers/perps/.',
+              },
+              {
+                group: ['expo-haptics/*'],
+                message:
+                  'Import from app/util/haptics instead of expo-haptics directly.',
+              },
+            ],
+          },
+        ],
+        // Fences the deprecated `app/util/number/index.js` module. We use
+        // `import-x/no-restricted-paths` (not `no-restricted-imports`) because
+        // it resolves each import to its absolute file, which means a single
+        // entry catches every spelling that lands on `index.js` — bare
+        // (`from '../util/number'`), explicit (`'../util/number/index'`),
+        // and explicit-with-extension. Sibling modules like `bigint`,
+        // `bignumber`, and `subscriptNotation` resolve to different files
+        // and are unaffected, so no negation list is needed. Inherits the
+        // burn-down allowlist from this override's `excludedFiles`; the
+        // burn-down override below intentionally does not re-declare this
+        // rule, so allow-listed files remain exempt.
+        'import-x/no-restricted-paths': [
+          'error',
+          {
+            zones: [
+              {
+                target: 'app',
+                from: 'app/util/number/index.js',
+                message:
+                  'app/util/number/index.js is deprecated. Import the BigInt-based replacement from app/util/number/bigint instead. See app/util/number/bigint-migration-reference.test.ts for migration patterns.',
+              },
+            ],
+          },
+        ],
+      },
+    },
+    {
+      // Re-apply expo-haptics + perps only for burn-down files. A second
+      // override is required because ESLint replaces `no-restricted-imports`
+      // when the same rule is set again — we cannot use one override with only
+      // `excludedFiles` for util/number without silently dropping other fences.
+      files: utilNumberImportBurndownFiles,
       rules: {
         'no-restricted-imports': [
           'error',
           {
+            paths: [
+              {
+                name: 'expo-haptics',
+                message:
+                  'Import from app/util/haptics instead of expo-haptics directly.',
+              },
+            ],
             patterns: [
               {
                 group: ['**/controllers/perps', '**/controllers/perps/**'],
                 message:
                   'Use @metamask/perps-controller instead of relative imports into app/controllers/perps/.',
               },
+              {
+                group: ['expo-haptics/*'],
+                message:
+                  'Import from app/util/haptics instead of expo-haptics directly.',
+              },
             ],
           },
         ],

.github/CODEOWNERS

@@ -43,6 +43,10 @@ app/core/Engine/README.md                                   @MetaMask/mobile-pla
 app/core/Engine/types.ts                                    @MetaMask/mobile-platform
 app/core/Engine/controllers/remote-feature-flag-controller/ @MetaMask/mobile-platform
 app/core/DeeplinkManager                                    @MetaMask/mobile-platform
+# Deprecated BN.js helpers. Gated to discourage adding new exports; consumers
+# should migrate to app/util/number/bigint. See .eslintrc.js for the import
+# fence and bigint-migration-reference.test.ts for migration patterns.
+app/util/number/index.js                                    @MetaMask/mobile-platform
 scripts/build.sh                                            @MetaMask/mobile-platform
 fingerprint.config.js                                       @MetaMask/mobile-platform
 builds.yml                                                  @MetaMask/mobile-platform
@@ -334,9 +338,10 @@ tests/tools/                                                    @MetaMask/qa
 tests/websocket/                                                @MetaMask/qa
 
 # QA Team - CI
+.github/guidelines/E2E_DECISION_TREE.md                         @MetaMask/qa
 .github/actions/smart-e2e-selection/                            @MetaMask/qa
 .github/workflows/ai-pr-risk-analysis.yml                       @MetaMask/qa
-.github/workflows/needs-e2e-build.yml                           @MetaMask/qa
+.github/workflows/auto-label-not-ready-for-e2e.yml              @MetaMask/qa
 .github/workflows/run-e2e-workflow.yml                          @MetaMask/qa
 .github/workflows/run-e2e-api-specs.yml                         @MetaMask/qa
 .github/workflows/run-e2e-regression-tests-android.yml          @MetaMask/qa