[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [local‑first/Storage](https://evolu.dev/docs/api-reference/common/local-first/Storage) › RangeUpperBound

```ts
type RangeUpperBound = TimestampBytes | InfiniteUpperBound;
```

Defined in: [packages/common/src/local-first/Storage.ts:228](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/local-first/Storage.ts#L228)

Union type for Range's upperBound: either a [TimestampBytes](https://evolu.dev/docs/api-reference/common/local-first/Timestamp/variables/TimestampBytes) or
[InfiniteUpperBound](https://evolu.dev/docs/api-reference/common/local-first/Storage/variables/InfiniteUpperBound).