[FLASK] Add snap cronjobs (#16239)

* Add Cronjob controller configuration

* Add Cronjob permission icon and description

* Add lint fix changes

* Add missing action to the allow-list

* Fix permission

* Fix icon and message

Co-authored-by: Frederik Bolding <frederik.bolding@gmail.com>

app/_locales/en/messages.json

@@ -2660,6 +2660,10 @@
     "message": "Connect to the $1 Snap.",
     "description": "The description for the `wallet_snap_*` permission. $1 is the name of the Snap."
   },
+  "permission_cronjob": {
+    "message": "Schedule and execute periodic actions.",
+    "description": "The description for the `snap_cronjob` permission"
+  },
   "permission_customConfirmation": {
     "message": "Display a confirmation in MetaMask.",
     "description": "The description for the `snap_confirm` permission"

app/scripts/metamask-controller.js

@@ -49,6 +49,7 @@ import {
 import SmartTransactionsController from '@metamask/smart-transactions-controller';
 ///: BEGIN:ONLY_INCLUDE_IN(flask)
 import {
+  CronjobController,
   SnapController,
   IframeExecutionService,
 } from '@metamask/snap-controllers';
@@ -753,6 +754,24 @@ export default class MetamaskController extends EventEmitter {
         },
       },
     });
+    // --- Snaps Cronjob Controller configuration
+    const cronjobControllerMessenger = this.controllerMessenger.getRestricted({
+      name: 'CronjobController',
+      allowedEvents: [
+        'SnapController:snapInstalled',
+        'SnapController:snapUpdated',
+        'SnapController:snapRemoved',
+      ],
+      allowedActions: [
+        `${this.permissionController.name}:getPermissions`,
+        'SnapController:handleRequest',
+        'SnapController:getAll',
+      ],
+    });
+    this.cronjobController = new CronjobController({
+      state: initState.CronjobController,
+      messenger: cronjobControllerMessenger,
+    });
     ///: END:ONLY_INCLUDE_IN
     this.detectTokensController = new DetectTokensController({
       preferences: this.preferencesController,
@@ -1042,6 +1061,7 @@ export default class MetamaskController extends EventEmitter {
       CollectiblesController: this.collectiblesController,
       ///: BEGIN:ONLY_INCLUDE_IN(flask)
       SnapController: this.snapController,
+      CronjobController: this.cronjobController,
       NotificationController: this.notificationController,
       ///: END:ONLY_INCLUDE_IN
     });
@@ -1083,6 +1103,7 @@ export default class MetamaskController extends EventEmitter {
         CollectiblesController: this.collectiblesController,
         ///: BEGIN:ONLY_INCLUDE_IN(flask)
         SnapController: this.snapController,
+        CronjobController: this.cronjobController,
         NotificationController: this.notificationController,
         ///: END:ONLY_INCLUDE_IN
       },

shared/constants/permissions.ts

@@ -24,12 +24,10 @@ export const EndowmentPermissions = Object.freeze({
   'endowment:network-access': 'endowment:network-access',
   'endowment:long-running': 'endowment:long-running',
   'endowment:transaction-insight': 'endowment:transaction-insight',
+  'endowment:cronjob': 'endowment:cronjob',
 } as const);
 
 // Methods / permissions in external packages that we are temporarily excluding.
 export const ExcludedSnapPermissions = new Set(['snap_dialog']);
-export const ExcludedSnapEndowments = new Set([
-  'endowment:keyring',
-  'endowment:cronjob',
-]);
+export const ExcludedSnapEndowments = new Set(['endowment:keyring']);
 ///: END:ONLY_INCLUDE_IN

ui/helpers/utils/permission.js

@@ -102,6 +102,11 @@ const PERMISSION_DESCRIPTIONS = deepFreeze({
     leftIcon: 'fas fa-info',
     rightIcon: null,
   },
+  [EndowmentPermissions['endowment:cronjob']]: {
+    label: (t) => t('permission_cronjob'),
+    leftIcon: 'fas fa-clock',
+    rightIcon: null,
+  },
   ///: END:ONLY_INCLUDE_IN
   [UNKNOWN_PERMISSION]: {
     label: (t, permissionName) =>