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[Home](./index.md) &gt; [@contract-case/case-boundary](./case-boundary.md) &gt; [ILogPrinter](./case-boundary.ilogprinter.md)

## ILogPrinter interface

Implement this interface to give ContractCase a way to print logs in your target language. Most platforms will want to print to standard out, but some might need to log to a file or otherwise collate the logs.

**Signature:**

```typescript
export interface ILogPrinter
```

## Methods

| Method                                                                                                          | Description                                                                                                                                                           |
| --------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [log(level, timestamp, version, typeString, location, message, additional)](./case-boundary.ilogprinter.log.md) | Called by ContractCase to ask the DSL to print a log line. You do not need to filter calls to this interface, it will only be called when it is appropriate to print. |