public static function checkout_action() {
		if ( isset( $_POST['woocommerce_checkout_place_order'] ) || isset( $_POST['woocommerce_checkout_update_totals'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Missing
			wc_nocache_headers();

			if ( WC()->cart->is_empty() ) {
				wp_safe_redirect( wc_get_cart_url() );
				exit;
			}

			wc_maybe_define_constant( 'WOOCOMMERCE_CHECKOUT', true );

			WC()->checkout()->process_checkout();
		}
	}