采用实时出价的 AMPHTML 广告

message SiteExt {
  enum AmpPage {
    // This is not an AMP page.
    DIALECT_HTML = 0;

    // This is an Amp page.
    DIALECT_HTML_AMP = 1;
  }

  // Whether this is an AMP page or not. Omitted if unknown.
  optional AmpPage amp = 1;
  enum VisibilityState {
    VISIBILITY_STATE_UNKNOWN = 0;

    // The page is at least partially visible. For example, in the foreground
    // tab of a non-minimized window.
    VISIBILITY_STATE_VISIBLE = 1;

    // The page is not visible to users. For example, when the page is in a
    // background browser tab, or in a minimized window.
    VISIBILITY_STATE_HIDDEN = 2;
  }

  // The visibility state of the web page containing the ad slot.
  // See https://www.w3.org/TR/page-visibility/.
  // [AdX: BidRequest.page_visibility]
  optional VisibilityState page_visibility = 2 [default =
    VISIBILITY_STATE_UNKNOWN];

  // Information about a browser window's user activation state. See
  // https://html.spec.whatwg.org/multipage/interaction.html#the-useractivation-interface.
  message UserActivation {
    // Indicates whether a user has completed an interaction since page load.
    optional bool wasact = 1;

    // Indicates whether a user is currently interacting with the page.
    optional bool isact = 2;
  }

  // User activation information from the browser for the current request, if
  // the request is for a web page.
  optional UserActivation uact = 5;

  // The set of possible web navigation types that predicate a page load. Each
  // of these types may have different performance characteristics. For example,
  // users going back and forth might experience a faster site than users
  // performing navigation for the first time or submitting forms. See
  // https://w3c.github.io/navigation-timing/#dom-performancenavigationtiming-type.
  enum NavigationType {
    NAVIGATION_TYPE_UNKNOWN = 0;

    // Navigation started by clicking a link, entering the URL in the browser's
    // address bar, form submission, or initializing through a script operation
    // other than reload and back_forward.
    NAVIGATION_TYPE_NAVIGATE = 1;

    // Navigation is through the browser's reload operation, location.reload(),
    // or a Refresh pragma directive like
    // <meta http-equiv="refresh" content="300">.
    NAVIGATION_TYPE_RELOAD = 2;

    // Navigation is through the browser's history traversal operation.
    NAVIGATION_TYPE_BACK_FORWARD = 3;

    // Navigation is initiated by a prerender hint (deprecated). See
    // https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/rel/prerender.
    NAVIGATION_TYPE_PRERENDER = 4;
  }

  // The type of browser navigation that led to the current page. Unset for
  // non-web ad requests.
  optional NavigationType ntype = 6;

  // Indicates that the request is using semi-transparent branding,
  // which means only a truncated version of the request URL will
  // be provided. This decision is made by the publisher, see
  // https://support.google.com/admanager/answer/4584891#urls for context.
  optional bool is_semi_transparent_request = 3;

  // The domain of the partner (of the site owner) with ownership
  // of some portion of ad inventory on the site. The partner's ads.txt file
  // will be hosted here. More detail at
  // http://iabtechlab.com/wp-content/uploads/2021/03/ctv-app-ads-explainer-guide.pdf
  optional string inventorypartnerdomain = 4;
}

// Ad Exchange extensions for the Imp object.
message ImpExt {
...
  // Possible requirement types for AMP ads.
  enum AmpAdRequirementType {
    // AMP ad requirements unknown.
    UNKNOWN_AMP_AD_REQUIREMENT_TYPE = 1;
    // AMP ads are not allowed.
    AMP_AD_NOT_ALLOWED = 2;
    // Either AMP ads or non-AMP ads are allowed;
    // AMP ads are not early rendered.
    AMP_AD_ALLOWED_AND_NOT_EARLY_RENDERED = 3;
    // Either AMP ads or non-AMP ads are allowed;
    // AMP ads are early rendered.
    AMP_AD_ALLOWED_AND_EARLY_RENDERED = 4;
    // AMP ads are required.
    // Ads that are non-AMP may be rejected by the publisher.
    AMP_AD_REQUIRED = 5;
    // Exchange-specific values above 500.
  }
  optional AmpAdRequirementType ampad = 8
    [default = UNKNOWN_AMP_AD_REQUIREMENT_TYPE];
}

// Whether this is an AMP page or not.
enum AmpPage {
  // AMP page status unknown.
  UNKNOWN_AMP_PAGE = 0;

// Possible requirement types for AMP ads.
enum AmpAdRequirementType {
  // AMP ad requirements unknown.
  UNKNOWN_AMP_AD_REQUIREMENT_TYPE = 0;

// The URL to fetch an AMPHTML ad. Only one of the following should be set:
// html_snippet, video_url, amp_ad_url, native_ad.
optional string amp_ad_url = 23;