feat: Add isMinimumPlatformVersion action

packages/snaps-controllers/coverage.json

@@ -1,6 +1,6 @@
 {
-  "branches": 93.67,
-  "functions": 98.16,
+  "branches": 93.68,
+  "functions": 98.17,
   "lines": 98.51,
-  "statements": 98.34
+  "statements": 98.35
 }

packages/snaps-controllers/src/snaps/SnapController.test.tsx

@@ -11581,4 +11581,75 @@ describe('SnapController', () => {
       snapController.destroy();
     });
   });
+
+  describe('SnapController:isMinimumPlatformVersion', () => {
+    it('returns true or false depending on whether the minimum version is supported', async () => {
+      const messenger = getSnapControllerMessenger();
+
+      const manifest = getSnapManifest({
+        platformVersion: '6.0.0' as SemVerVersion,
+      });
+
+      const snapController = getSnapController(
+        getSnapControllerOptions({
+          messenger,
+          state: {
+            snaps: getPersistedSnapsState(getPersistedSnapObject({ manifest })),
+          },
+        }),
+      );
+
+      expect(
+        messenger.call(
+          'SnapController:isMinimumPlatformVersion',
+          MOCK_SNAP_ID,
+          '1.0.0' as SemVerVersion,
+        ),
+      ).toBe(true);
+
+      expect(
+        messenger.call(
+          'SnapController:isMinimumPlatformVersion',
+          MOCK_SNAP_ID,
+          manifest.platformVersion as SemVerVersion,
+        ),
+      ).toBe(true);
+
+      expect(
+        messenger.call(
+          'SnapController:isMinimumPlatformVersion',
+          MOCK_SNAP_ID,
+          '7.0.0' as SemVerVersion,
+        ),
+      ).toBe(false);
+
+      snapController.destroy();
+    });
+
+    it('returns false if the platformVersion is undefined', async () => {
+      const messenger = getSnapControllerMessenger();
+
+      const manifest = getSnapManifest();
+      delete manifest.platformVersion;
+
+      const snapController = getSnapController(
+        getSnapControllerOptions({
+          messenger,
+          state: {
+            snaps: getPersistedSnapsState(getPersistedSnapObject({ manifest })),
+          },
+        }),
+      );
+
+      expect(
+        messenger.call(
+          'SnapController:isMinimumPlatformVersion',
+          MOCK_SNAP_ID,
+          '999.0.0' as SemVerVersion,
+        ),
+      ).toBe(false);
+
+      snapController.destroy();
+    });
+  });
 });

packages/snaps-controllers/src/snaps/SnapController.ts

@@ -113,6 +113,7 @@ import type {
   CaipAssetType,
   JsonRpcRequest,
   Hex,
+  SemVerVersion,
 } from '@metamask/utils';
 import {
   hexToNumber,
@@ -134,7 +135,7 @@ import { createMachine, interpret } from '@xstate/fsm';
 import { Mutex } from 'async-mutex';
 import type { Patch } from 'immer';
 import { nanoid } from 'nanoid';
-import { gt } from 'semver';
+import { gt, gte } from 'semver';
 
 import {
   ALLOWED_PERMISSIONS,
@@ -462,6 +463,11 @@ export type GetSnapFile = {
   handler: SnapController['getSnapFile'];
 };
 
+export type IsMinimumPlatformVersion = {
+  type: `${typeof controllerName}:isMinimumPlatformVersion`;
+  handler: SnapController['isMinimumPlatformVersion'];
+};
+
 export type SnapControllerGetStateAction = ControllerGetStateAction<
   typeof controllerName,
   SnapControllerState
@@ -488,7 +494,8 @@ export type SnapControllerActions =
   | RevokeDynamicPermissions
   | GetSnapFile
   | SnapControllerGetStateAction
-  | StopAllSnaps;
+  | StopAllSnaps
+  | IsMinimumPlatformVersion;
 
 // Controller Messenger Events
 
@@ -1256,6 +1263,11 @@ export class SnapController extends BaseController<
       `${controllerName}:stopAllSnaps`,
       async (...args) => this.stopAllSnaps(...args),
     );
+
+    this.messagingSystem.registerActionHandler(
+      `${controllerName}:isMinimumPlatformVersion`,
+      (...args) => this.isMinimumPlatformVersion(...args),
+    );
   }
 
   #handlePreinstalledSnaps(preinstalledSnaps: PreinstalledSnap[]) {
@@ -2178,6 +2190,26 @@ export class SnapController extends BaseController<
     return encoded;
   }
 
+  /**
+   * Determine if a given Snap ID supports a given miniumum version of the Snaps platform
+   * by inspecting the platformVersion in the Snap manifest.
+   *
+   * @param snapId - The Snap ID.
+   * @param version - The version.
+   * @returns True if the platform version is equal or greater to the passed version, false otherwise.
+   */
+  isMinimumPlatformVersion(snapId: SnapId, version: SemVerVersion): boolean {
+    const snap = this.getExpect(snapId);
+
+    const { platformVersion } = snap.manifest;
+
+    if (!platformVersion) {
+      return false;
+    }
+
+    return gte(platformVersion, version);
+  }
+
   /**
    * Completely clear the controller's state: delete all associated data,
    * handlers, event listeners, and permissions; tear down all snap providers.