signature

The key-value pairs that ad networks use to cryptographically sign a web ad.

Declaration

object signature

Name	Type	Description
`version` Required	string	The SKAdNetwork version. Use version `“4.0”` or later. For version information, see SKAdNetwork release notes.
`ad_network_id` Required	string	The ad network ID. You receive an ad network ID when you register to use SKAdNetwork. For more information, see Registering an ad network.
`source_identifier` Required	integer	A four-digit value you use to measure the aspects of an advertising effort or campaign.
`itunes_item_id` Required	integer	The App Store ID of the app that the ad impression advertises. This is the same value the ad network provides in the attributable ad link. For more information, see Creating an attributable ad link.
`nonce` Required	string	A UUID you generate to include in the signature. This value needs to match the value of `attributionSourceNonce` in the original ad link. This value needs to be in the `UUID` string format. Provide the dash-separated representation of the `attributionSourceNonce`.
`source_domain` Required	string	The effective top-level domain and one more preceding path component (eTLD+1) representation of the ad network that seeks ad attribution.
`fidelity_type` Required	integer	The fidelity type value for web ads is `1`.
`timestamp` Required	integer	An integer that represents the UNIX time, in milliseconds, of the ad impression.

Use the required parameters in the signature object to generate a cryptographic signature for the AdImpressionResponse. For more information, see Generating a signature for attributable web ads.