> ## Documentation Index
> Fetch the complete documentation index at: https://dynamic-docs-feat-sidebar-revamp.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Handlers Introduction

Handlers is a way to programmatically customize synchronous behaviors in the SDK.
They allow running code synchronously and wait until completion, unlike [**Events**](/react-sdk/events/events-introduction) that run a-synchronous and do not block the authentication flow.

Handlers are configured in the DynamicContextProvider:

```tsx
<DynamicContextProvider
  settings={{
    handlers: {
      // handles callbacks go here
    },
  }}
>
  ...
</DynamicContextProvider>
```

[**handleConnectedWallet**](/react-sdk/handlers/handleconnectedwallet): Handler that runs before Dynamic establishes a wallet connection (Connect wallet before the authentication step).
For example This is a good place to run compliance checks.

[**handleAuthenticatedUser**](/react-sdk/handlers/handleauthenticateduser): Handler that runs after the user authenticated but before Dynamic's finished the authentication flow.
For example: It is a good place to perform blocking actions with the user on your backend before Dynamic's SDK finished the authentication flow.