---
title: SKAdTestPostbackVersion
framework: storekittest
role: symbol
role_heading: Structure
path: storekittest/skadtestpostbackversion
---

# SKAdTestPostbackVersion

A constant that indicates the postback version.

## Declaration

```swift
struct SKAdTestPostbackVersion
```

## Overview

Overview This postback version number corresponds to a version of SKAdNetwork. All versions of SKAdNetwork have specific instructions for signing ads and validating postbacks. The testing environment supports testing the versions indicated by the constants listed in the Getting SKAdNetwork Versions section below. For more information about versions, see SKAdNetwork release notes.

## Topics

### Getting SKAdNetwork Versions

- [version4_0](storekittest/skadtestpostbackversion/version4_0.md)
- [version3_0](storekittest/skadtestpostbackversion/version3_0.md)
- [version2_2](storekittest/skadtestpostbackversion/version2_2.md)
- [version2_1](storekittest/skadtestpostbackversion/version2_1.md)

### Initializing the Postback Version

- [init(rawValue:)](storekittest/skadtestpostbackversion/init(rawvalue:).md)

## Relationships

### Conforms To

- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Ad impression and postback testing

- [Testing and validating ad impression signatures and postbacks for SKAdNetwork](storekittest/testing-and-validating-ad-impression-signatures-and-postbacks-for-skadnetwork.md)
- [SKAdTestSession](storekittest/skadtestsession.md)
- [SKAdTestPostback](storekittest/skadtestpostback.md)
- [SKAdTestPostbackResponse](storekittest/skadtestpostbackresponse.md)