> ## 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.

# mapError

> Kotlin Function

**Function**

```kotlin theme={null}
inline fun <T, E, F> Result<T, E>.mapError(transform: (E) -> F): Result<T, F>
```

Transforms the error using transform, leaving successes unchanged.