feat(solana-wallet-snap): add read-only CoreAssetsAdapter and mapControllerAsset

packages/solana-wallet-snap/package.json

@@ -52,10 +52,13 @@
   },
   "devDependencies": {
     "@jest/globals": "^29.5.0",
+    "@metamask/assets-controller": "^13.0.0",
     "@metamask/auto-changelog": "^6.1.1",
     "@metamask/key-tree": "^10.1.1",
     "@metamask/keyring-api": "^24.1.0",
     "@metamask/keyring-snap-sdk": "^10.0.0",
+    "@metamask/messenger": "^2.0.0",
+    "@metamask/remote-feature-flag-controller": "^5.0.0",
     "@metamask/snap-networks-utils": "^1.0.0",
     "@metamask/snaps-cli": "^8.4.1",
     "@metamask/snaps-jest": "^10.2.1",

packages/solana-wallet-snap/snap.manifest.json

@@ -88,7 +88,15 @@
     "snap_manageAccounts": {},
     "snap_manageState": {},
     "snap_dialog": {},
-    "snap_getPreferences": {}
+    "snap_getPreferences": {},
+    "endowment:messenger": {
+      "actions": [
+        "RemoteFeatureFlagController:getState",
+        "AssetsController:getAccountAssetByID",
+        "AssetsController:getAccountAssetsByIDs",
+        "AssetsController:getAccountAssetsByScope"
+      ]
+    }
   },
   "platformVersion": "12.0.1",
   "manifestVersion": "0.1"

packages/solana-wallet-snap/src/core/services/assets/AssetsService.test.ts

@@ -24,6 +24,7 @@ import type { AccountsService } from '../accounts/AccountsService';
 import type { ConfigProvider } from '../config';
 import type { SolanaConnection } from '../connection';
 import type { TokenPricesService } from '../token-prices/TokenPrices';
+import { CoreAssetsAdapter } from './adapters/CoreAssetsAdapter';
 import { SnapAssetsAdapter } from './adapters/SnapAssetsAdapter';
 import type { AssetsRepository } from './AssetsRepository';
 import { AssetsService } from './AssetsService';
@@ -101,8 +102,20 @@ describe('AssetsService', () => {
       nftApiClient: mockNftApiClient,
     });
 
+    const coreAdapter = new CoreAssetsAdapter({
+      logger: mockLogger,
+      getAccountAssetByID: jest.fn().mockResolvedValue(null),
+      getAccountAssetsByIDs: jest.fn().mockResolvedValue({}),
+      getAccountAssetsByScope: jest.fn().mockResolvedValue({}),
+      findAccountById: mockAccountsService.findById.bind(mockAccountsService),
+      getActiveNetworks:
+        mockConfigProvider.getActiveNetworks.bind(mockConfigProvider),
+      fetchMint: mockConnection.fetchMint.bind(mockConnection),
+    });
+
     assetsService = new AssetsService({
       snapAdapter: snapAssetsAdapter,
+      coreAdapter,
     });
   });
 

packages/solana-wallet-snap/src/core/services/assets/AssetsService.ts

@@ -3,20 +3,33 @@ import type { FungibleAssetMarketData } from '@metamask/snaps-sdk';
 import type { CaipAssetType, CaipChainId } from '@metamask/utils';
 
 import type { AssetEntity, SolanaKeyringAccount } from '../../../entities';
+import type { CoreAssetsAdapter } from './adapters/CoreAssetsAdapter';
 import { SnapAssetsAdapter } from './adapters/SnapAssetsAdapter';
 import type { AssetMetadata } from './types';
 
 /**
  * Assets domain facade. Currently delegates all behavior to SnapAssetsAdapter
- * (legacy snap-owned reads/writes).
+ * (legacy snap-owned reads/writes). Core adapter is initialized for upcoming
+ * routing without changing callers.
  */
 export class AssetsService {
   readonly #snapAdapter: SnapAssetsAdapter;
 
+  // Initialized for upcoming Core routing; not read until the migration PR lands.
+  // eslint-disable-next-line no-unused-private-class-members -- reserved adapter slot
+  readonly #coreAdapter: CoreAssetsAdapter;
+
   readonly cacheTtlsMilliseconds: typeof SnapAssetsAdapter.cacheTtlsMilliseconds;
 
-  constructor({ snapAdapter }: { snapAdapter: SnapAssetsAdapter }) {
+  constructor({
+    snapAdapter,
+    coreAdapter,
+  }: {
+    snapAdapter: SnapAssetsAdapter;
+    coreAdapter: CoreAssetsAdapter;
+  }) {
     this.#snapAdapter = snapAdapter;
+    this.#coreAdapter = coreAdapter;
     this.cacheTtlsMilliseconds = SnapAssetsAdapter.cacheTtlsMilliseconds;
   }