public static function deactivate_keys( $keys ) {

		$keys = array_map( 'sanitize_text_field', $keys );
		$keys = array_map( 'trim', $keys );

		$data = array(
			'keys' => array(),
			'url'  => get_site_url(),
		);

		// Delete any cached activation result.
		$cache_hash = md5( wp_json_encode( $data ) );
		delete_site_transient( 'llms_helper_keys_activation_response_' . $cache_hash );

		$saved = llms_helper_options()->get_license_keys();
		foreach ( $keys as $key ) {
			if ( isset( $saved[ $key ] ) && $saved[ $key ]['update_key'] ) {
				$data['keys'][ $key ] = $saved[ $key ]['update_key'];
			}
		}

		$req = new LLMS_Dot_Com_API( '/license/deactivate', $data );
		return $req->get_result();
	}