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

# CrossmintOrdersException

> Flutter Final Class

**Final Class**

Thrown by checkout / order operations — invalid line items, payment method mismatches, order lookup failures.

```dart theme={null}
final class CrossmintOrdersException extends CrossmintException
```

## Constructors

### CrossmintOrdersException

```dart theme={null}
const CrossmintOrdersException(
  super.message, {
  super.code = CrossmintErrorCode.unknown,
  super.cause,
})
```

Creates an orders exception.