---
title: SKStoreProductParameterAdNetworkTimestamp
framework: storekit
role: symbol
role_heading: Global Variable
path: storekit/skstoreproductparameteradnetworktimestamp
---

# SKStoreProductParameterAdNetworkTimestamp

The key that represents the UNIX time, in milliseconds, of the ad impression.

## Declaration

```swift
let SKStoreProductParameterAdNetworkTimestamp: String
```

## Mentioned in

Combining parameters to generate a signature for SKAdNetwork 1 Generating the signature to validate StoreKit-rendered ads

## Discussion

Discussion The value for this key is an NSNumber. Ad networks generate the timestamp, represented as UNIX time in milliseconds, at the time you’re preparing to serve the ad.

## See Also

### Required keys

- [SKStoreProductParameterAdNetworkIdentifier](storekit/skstoreproductparameteradnetworkidentifier.md)
- [SKStoreProductParameterAdNetworkCampaignIdentifier](storekit/skstoreproductparameteradnetworkcampaignidentifier.md)
- [SKStoreProductParameterAdNetworkNonce](storekit/skstoreproductparameteradnetworknonce.md)
- [SKStoreProductParameterAdNetworkAttributionSignature](storekit/skstoreproductparameteradnetworkattributionsignature.md)