# Delegatecall (/sdk/v5_3_x/core-api/delegatecall)

> For the complete documentation index, see [llms.txt](/llms.txt)



<VersionWarning version="5.3.x" />

<Callout type="warn">
  `delegatecall` is very dangerous.  Unless you know exactly what you are doing, don't do it, or you might risk losing all your funds.
</Callout>

<Callout type="info">
  Impatient?  Check out [complete examples here](https://github.com/zerodevapp/zerodev-examples/blob/main/delegatecall/main.ts).
</Callout>

`delegatecall` is a powerful EVM opcode that allows the calling contract to execute code in another contract, while keeping the storage context.  [You can read more about `delegatecall` here](https://solidity-by-example.org/delegatecall/).

## API [#api]

To send a UserOp that uses `delegatecall`, simply specify the `callType` of the UserOp:

```typescript
const userOpHash = await kernelClient.sendUserOperation({
  userOperation: {
    callData: await kernelClient.account.encodeCallData({
      to: targetAdress,
      data: callData,
      value: 0n,
      callType: "delegatecall",
    }),
  },
})
```