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wp-content/plugins/jetpack-boost/app/modules/optimizations/image-cdn/class-liar.php

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+<?php
+
+namespace Automattic\Jetpack_Boost\Modules\Optimizations\Image_CDN;
+
+use Automattic\Jetpack_Boost\Contracts\Changes_Output_On_Activation;
+use Automattic\Jetpack_Boost\Contracts\Sub_Feature;
+use Automattic\Jetpack_Boost\Lib\Premium_Features;
+
+class Liar implements Sub_Feature, Changes_Output_On_Activation {
+
+	public function setup() {
+		add_action( 'wp_footer', array( $this, 'inject_image_cdn_liar_script' ) );
+	}
+
+	public static function get_slug() {
+		return 'image_cdn_liar';
+	}
+
+	public static function is_available() {
+		return Premium_Features::has_feature( Premium_Features::IMAGE_CDN_LIAR );
+	}
+
+	/**
+	 * Injects the image-cdn-liar.js script as an inline script in the footer.
+	 */
+	public function inject_image_cdn_liar_script() {
+		$file = __DIR__ . '/dist/inline-liar.js';
+		if ( file_exists( $file ) ) {
+			// Include the JavaScript directly inline.
+			// phpcs:ignore
+			$data = file_get_contents( $file );
+			// There's no meaningful way to escape JavaScript in this context.
+			// phpcs:ignore
+			echo wp_get_inline_script_tag( $data, array( 'async' => true ) );
+		}
+	}
+
+	public static function get_parent_features(): array {
+		return array(
+			Image_CDN::class,
+		);
+	}
+}