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# version

The version of the SKAdNetwork API.

```
var version: String { get set }
```

## Discussion

Set this instance property to the SKAdNetwork version you’re using to sign the view-through ad impression. View-through ads are available starting in version 2.2. For more information about versions and availability, see [SKAdNetwork release notes](/documentation/StoreKit/skadnetwork-release-notes).

---

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