in integration/FacebookWordpressEasyDigitalDownloads.php [318:339]
public static function createAddToCartEvent($download_id){
$event_data = FacebookPluginUtils::getLoggedInUserInfo();
$currency = EDDUtils::getCurrency();
$download = edd_get_download($download_id);
$title = $download ? $download->post_title : '';
if ( get_post_meta($download_id, '_variable_pricing', true) ) {
$prices = get_post_meta($download_id, 'edd_variable_prices', true);
$price = array_shift($prices);
$value = $price['amount'];
} else {
$value = get_post_meta($download_id, 'edd_price', true);
}
if (!$value) {
$value = 0;
}
$event_data['content_ids'] = [(string)$download_id];
$event_data['content_type'] = 'product';
$event_data['currency'] = $currency;
$event_data['value'] = $value;
$event_data['content_name'] = $title;
return $event_data;
}