> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cloud.coinbase.com/llms.txt
> Use this file to discover all available pages before exploring further.

# sendUserOperation

```ts theme={null}
function sendUserOperation(options: SendUserOperationOptions): Promise<SendUserOperationResult>;
```

Sends a user operation from a smart account.

## Parameters

| Parameter | Type                                                                                                              | Description                                 |
| --------- | ----------------------------------------------------------------------------------------------------------------- | ------------------------------------------- |
| `options` | [`SendUserOperationOptions`](/sdks/cdp-sdks-v2/frontend/@coinbase/cdp-core/Type-Aliases/SendUserOperationOptions) | The options for sending the user operation. |

## Returns

`Promise`\<[`SendUserOperationResult`](/sdks/cdp-sdks-v2/frontend/@coinbase/cdp-core/Type-Aliases/SendUserOperationResult)>

Promise that resolves to the user operation hash.

## Example

```typescript lines theme={null}
const user = await getCurrentUser();
const smartAccount = user?.evmSmartAccountObjects[0]?.address;

const result = await sendUserOperation({
  evmSmartAccount: smartAccount,
  network: "base-sepolia",
  calls: [{
    to: "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
    value: 0n,
    data: "0x",
  }],
  dataSuffix: "0x62617365617070070080218021802180218021802180218021", // ERC-8021 attribution
});
console.log("User Operation Hash:", result.userOperationHash);
```