# TraceEventKind

`import { TraceEventKind } from "destack:runtime";`

Trace event class.

```ds title="TraceEventKind"
export enum TraceEventKind {
    Entropy = 1,
    BindingCall = 2,
    Control = 3,
    Marker = 4,
}
```

[language/library/src/runtime/trace.ds:12:21](https://github.com/destack-sh/destack/blob/main/language/library/src/runtime/trace.ds#L12-L21)

## Variants

### `Entropy = 1`

Runtime entropy or nondeterministic decision.

### `BindingCall = 2`

Recorded binding call.

### `Control = 3`

Runtime or world control mutation.

### `Marker = 4`

Explicit marker event.