> ## Documentation Index > Fetch the complete documentation index at: https://docs.dynamic.xyz/docs/llms.txt > Use this file to discover all available pages before exploring further. # Upgrade SDK from V3 to V4 For new React apps, we recommend the JavaScript SDK with React Hooks (`@dynamic-labs-sdk/react-hooks`) instead of the legacy React SDK documented here. The JS SDK comes with many benefits such as a much smaller bundle size and other optimizations. Use the [React quickstart (JavaScript SDK)](/javascript/reference/react-quickstart) to get started. Below are the breaking changes in V4 so far. If you don't see anything you'll be affected by, you can skip this guide and simply update your SDK package to [the latest V4](https://www.npmjs.com/package/@dynamic-labs/sdk-react-core?activeTab=versions). Just make sure to also upgrade all your other dynamic packages too! ### Breaking changes #### Starknet V6 We upgraded to Starknet v6 See this guide for more details: [https://starknetjs.com/docs/guides/migrate/](https://starknetjs.com/docs/guides/migrate/) There are no code changes required on the Dynamic SDK side, however if you have installed the starknet package, you will need to upgrade to >= v6.11.0. #### Walletbook methods isWalletMethodSupported and isWalletEventSupported have been removed from wallet-book as part of a refactor to improve the way the SDK operates. ### eventsCallbacks removed In V2, we deprecated the eventsCallbacks prop on the DynamicContextProvider in favour of a prop called `events` which has the same purpose. In V4 we are removing the old prop entirely. ### authToken and minAuthToken In V4 we stopped exporting authToken and minAuthToken from the dynamic context. You can still get these values by calling `getAuthToken` and `getMinAuthToken`. Note that if you just want to know if the user is logged in or not, you can use the `useIsLoggedIn` hook. ### useFunding hook method changed In V4, we changed the `openFunding` method exported from `useFunding` hook to `openExternalFunding` which now takes in a required parameter of `onrampProvider`. #### ZeroDev package upgraded to 5.4.5 In V4, we updated the ZeroDev package to 5.4.5 which contains some breaking changes regarding the kernel client. [Learn more here](https://docs.zerodev.app/sdk/getting-started/migration#sdk-53x--54x) ### New features #### Events [`useDynamicEvents`](/react/reference/hooks/usedynamicevents) which allows you to listen to events emitted by the SDK now exposes more events. The full list of available events is now: *Auth Events* authFailure authFlowCancelled authFlowClose authFlowOpen authInit logout *Wallet Events* walletAdded walletRemoved embeddedWalletCreated primaryWalletChanged primaryWalletNetworkChanged userWalletsChanged *OTP/MFA Events* emailVerificationResult smsVerificationResult mfaCompletionFailure mfaCompletionSuccess