chore: integrate storageService with tokenListController

eslint-suppressions.json

@@ -348,7 +348,7 @@
   },
   "packages/assets-controllers/src/TokenListController.test.ts": {
     "@typescript-eslint/explicit-function-return-type": {
-      "count": 2
+      "count": 1
     },
     "id-denylist": {
       "count": 2
@@ -357,14 +357,6 @@
       "count": 7
     }
   },
-  "packages/assets-controllers/src/TokenListController.ts": {
-    "@typescript-eslint/explicit-function-return-type": {
-      "count": 6
-    },
-    "no-restricted-syntax": {
-      "count": 7
-    }
-  },
   "packages/assets-controllers/src/TokenRatesController.test.ts": {
     "@typescript-eslint/explicit-function-return-type": {
       "count": 4

packages/assets-controllers/CHANGELOG.md

@@ -13,6 +13,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- **BREAKING:** `TokenListController` now persists `tokensChainsCache` via `StorageService` using per-chain files to reduce write amplification ([#7413](https://github.com/MetaMask/core/pull/7413))
+  - Each chain's token cache (~100-500KB) is stored in a separate file, avoiding rewriting all chains (~5MB) on every update
+  - Includes migration logic to automatically split existing cache data into per-chain files on first launch after upgrade
+  - All chains are loaded in parallel at startup to maintain compatibility with TokenDetectionController
+  - `tokensChainsCache` state metadata now has `persist: false` to prevent duplicate persistence
 - **BREAKING:** `AccountTrackerController` now requires `KeyringController:getState` action and `KeyringController:lock` event in addition to existing allowed actions and events ([#7492](https://github.com/MetaMask/core/pull/7492))
   - Added `#isLocked` property to track keyring lock state, initialized from `KeyringController:getState`
   - Added `isActive` getter that returns `true` when keyring is unlocked and user is onboarded

packages/assets-controllers/package.json

@@ -78,6 +78,7 @@
     "@metamask/snaps-controllers": "^14.0.1",
     "@metamask/snaps-sdk": "^9.0.0",
     "@metamask/snaps-utils": "^11.0.0",
+    "@metamask/storage-service": "^0.0.1",
     "@metamask/transaction-controller": "^62.7.0",
     "@metamask/utils": "^11.8.1",
     "@types/bn.js": "^5.1.5",