Shippy includes PSR-3 (opens new window) logging throughout the various requests to APIs. You can use the interface to add your own application's logging to Shippy, to have logging routed through there.
For example, we might like to use the popular Monolog (opens new window) package for logging. Maybe our application already uses it.
use Monolog\Logger;
use Monolog\Handler\StreamHandler;
use verbb\shippy\Shippy;
$logger = new Logger('Shippy');
$logger->pushHandler(new StreamHandler('shippy.log'));
Shippy::setLogger($logger);
With this in place, all logging that Shippy does will be routed through your Monolog logger, and into a shippy.log file within your application. This will include debug and error logging, which is configurable through your Monolog Logger instance.