# TraceSequence

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

Monotonic trace sequence number.

```ds title="TraceSequence"
export newtype TraceSequence = uint64
```

[language/library/src/runtime/lineage.ds:20](https://github.com/destack-sh/destack/blob/main/language/library/src/runtime/lineage.ds#L20)