Type Alias AssetInstance

Discriminated union of every creative asset instance recognised by the AdCP creative protocol. Narrow by asset_type to access the per-type fields:

function describe(asset: AssetInstance): string {
  switch (asset.asset_type) {
    case 'image':
      return `${asset.width}x${asset.height} @ ${asset.url}`;
    case 'video':
      return `${asset.duration_ms ?? 0}ms ${asset.container_format ?? ''}`;
    case 'html':
      return `${asset.content.length}B inline HTML`;
    // ...all branches required — exhaustiveness is enforced
  }
}
Copy

This is the type to use for creative_manifest.assets[<key>] values. The assets map itself is Record<string, AssetInstance> — keys come from the format's declared asset slot ids; values are these instances.