# getDefaultUserOperationFeeOptions | @account-kit/infra

> Overview of the getDefaultUserOperationFeeOptions function from @account-kit/infra

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

{/* This file is auto-generated by TypeDoc. Do not edit manually. */}

```ts
function getDefaultUserOperationFeeOptions(chain): any;
```

Defined in: [account-kit/infra/src/defaults.ts:26](https://github.com/alchemyplatform/aa-sdk/blob/main/account-kit/infra/src/defaults.ts#L26)

Retrieves the default user operation fee options for a given chain. Adjusts fees for specific chains like Arbitrum and Optimism.

## Example

```ts
import { getDefaultUserOperationFeeOptions } from "@account-kit/infra";
import { arbitrum } from "@account-kit/infra";

const feeOpts = getDefaultUserOperationFeeOptions(arbitrum);
```

## Parameters

<table>
  <thead>
    <tr>
      <th align="left">Parameter</th>
      <th align="left">Type</th>
      <th align="left">Description</th>
    </tr>
  </thead>

  <tbody>
    <tr>
      <td>
        `chain`
      </td>

      <td>
        [`Chain`](https://viem.sh)
      </td>

      <td>
        The blockchain chain for which to get the fee options
      </td>
    </tr>

  </tbody>
</table>

## Returns

`any`

An object containing the default fee options for user operations on the specified chain