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- Add PrefixedStoreAdapter to prefix all storage keys with instanceId - Add createIsolatedStorage utility for consistent storage creation - Add generateInstanceId for deterministic instance IDs - Add instanceId option to MultichainOptions for explicit control - Fix beforeunload listener bug (was using different function references) - Update tests to use instanceId: '' for backwards compatibility This enables multiple SDK clients to coexist without storage collisions. Each client instance gets its own storage namespace based on dapp.name and SDK type (e.g., 'mydapp-multichain:', 'mydapp-evm:').
- Add sdkType option to MultichainOptions for proper isolation - Fix EVM client to pass sdkType: 'evm' to multichain core - Increment IndexedDB version to force schema upgrade - Add experiments pages to browser playground for testing isolation - Add StateVisualizer component for inspecting storage state
- Add singleton caching using globalThis.__metamaskCore - Multiple SDK clients (Multichain, EVM, Solana) now share a single core instance - Add getCachedCore(), hasCachedCore(), and _clearCoreForTesting() utilities - Add Experiment7 for verifying core sharing behavior - Add singleton.test.ts with comprehensive test coverage This ensures that regardless of how many SDK clients are instantiated, they all share the same underlying MultichainCore instance, preventing state conflicts and resource duplication. Co-authored-by: Cursor <cursoragent@cursor.com>
…e 2) - Add registerClient/unregisterClient/getClientCount to MultichainCore - EVM and Solana clients now register on connect, unregister on disconnect - Disconnect only revokes session when the last client disconnects - Add Experiment 8 to verify disconnect coordination behavior - Fix experiment imports to use correct package names This enables multiple SDK clients to share a session without tripping over each other during disconnect operations. Co-authored-by: Cursor <cursoragent@cursor.com>
- Add areScopesCovered() and mergeScopes() utility functions - Track scopes per client in ClientInfo type - Add getUnionScopes() method to MultichainCore - Modify transport connect() to skip prompts when scopes already covered - Merge scopes instead of revoking when expanding permissions - Add loading state and spinner for QR code approval flow - Create Experiment 9 to verify scope merging behavior - Update tests to reflect new scope merging behavior When a client reconnects and its requested scopes are already covered by the existing session, no approval prompt is shown. New scopes are merged with existing ones without revoking the session. Co-authored-by: Cursor <cursoragent@cursor.com>
- Add updateSessionScopes abstract method to MultichainCore - Implement updateSessionScopes in MetaMaskConnectMultichain - Update connect-evm and connect-solana disconnect to call updateSessionScopes - Add Experiment10 for testing partial disconnect behavior - Document CAIP limitation: no standard for partial scope revocation (wallet retains all granted scopes, SDK tracks remaining client scopes) Note: Per CAIP-25/285 research, wallet_createSession is additive only and wallet_revokeSession is full session revocation. Partial scope reduction is not supported by current CAIP standards. Co-authored-by: Cursor <cursoragent@cursor.com>
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