Retrieving the licence

Set up your application to request licenses from the license server in a similar way as for encrypted streaming.

If the content identifier is known to the application, the application may request the license before instigating the download; this is sometimes called the prefetch stage. When requesting a license for a persistent asset, the App must request the license from the OTVDRMManager with the license option OTVLicenseOptionOffline set to true. An instance of OTVLicenseDelegate needs to be set on drmmanager before prefetching the license. Make sure this prefetch method is used only for a single download at a time.
To prefetch licenses for multiple downloads, use the following to ensure that there are separate delegates associated with each download:
CODE
```
OTVPersistenceManager.shared.startDownload(urlAsset: urlAsset, title: assetName, licenseDelegate: delegate, artwork: nil, options: option) {
        }
```
If the content identifier is not known and is embedded within the EXT-X-KEY or EXT-X-SESSION-KEY tag of the HLS playlists, the OTVPersistenceManager handles requesting the license on behalf of the application.

In both cases, OTVPersistenceManager fetches the license and persists it for the lifetime of the OTVPersistenceAsset it creates.

Example code

CODE

if let contentId = stream.contentId, !contentId.isEmpty {
  let options = [OTVDRMManager.Keys.OTVLicenseOptionOffline: true as Any]
  OTVDRMManager.shared.requestLicense(identifier: contentId, license: options)
}

Next step: For encrypted content, you can now start the download