[Home](./index.md) > [@contract-case/case-boundary](./case-boundary.md) > [BoundaryStateHandler](./case-boundary.boundarystatehandler.md)
## BoundaryStateHandler class
An interface for a state handler that only has setup
**Signature:**
```typescript
export declare abstract class BoundaryStateHandler
```
## Methods
| Method | Modifiers | Description |
| -------------------------------------------------------------- | --------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [setup()](./case-boundary.boundarystatehandler.setup.md) | | Call the user's state setup function.
If the user provided no setup function, this should be a function that does nothing and returns a BoundarySuccess
|
| [teardown()](./case-boundary.boundarystatehandler.teardown.md) | | Call the user's state teardown function
If the user provided no teardown function, this should be a function that does nothing and returns a BoundarySuccess
|