# `onChainMessages`

This extension extends the `SafeClient` functionality by allowing on-chain messages.

On-chain messages are regular transactions created using the [SignMessageLib](https://github.com/safe-global/safe-smart-account/blob/main/contracts/libraries/SignMessageLib.sol) contract.

## Usage


<Tabs items={['example.ts', 'setup.ts']}>
  <Tabs.Tab>
    ```typescript
    import { onChainMessages } from '@safe-global/sdk-starter-kit'
    import { safeClient } from './setup.ts'

    const onchainMessagesClient = safeClient.extend(onChainMessages())
    ```
  </Tabs.Tab>
  <Tabs.Tab>
    ```typescript
    import { createSafeClient } from '@safe-global/sdk-starter-kit'

    export const safeClient = await createSafeClient({
      provider,
      signer,
      safeAddress: '0x...'
    })
    ```
  </Tabs.Tab>
</Tabs>


## Returns

`SafeClient & { sendOnChainMessage }`

The `SafeClient` instance with the extended functionality.