> ## 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.

# SwapIssues

```ts theme={null}
type SwapIssues = {
  allowance: SwapIssuesAllowance | null;
  balance: SwapIssuesBalance | null;
};
```

Potential issues discovered during preflight checks that could prevent the swap from being executed successfully. Null if no issues were detected.

## Properties

| Property                         | Type                            | Description                                                                                                                     |
| -------------------------------- | ------------------------------- | ------------------------------------------------------------------------------------------------------------------------------- |
| <a id="allowance" /> `allowance` | `SwapIssuesAllowance` \| `null` | Details of the allowance that the `taker` must set in order to execute the swap successfully. Null if no allowance is required. |
| <a id="balance" /> `balance`     | `SwapIssuesBalance` \| `null`   | Details of the `fromToken` balance that the `taker` must hold. Null if the `taker` has a sufficient balance.                    |