src/Currency/CurrencyServiceProvider.php
public function registerCurrency()
    {
        $this->app->singleton('currency', function ($app) {

            $this->app['events']->fire('currency.beforeRegister', [$this]);

            return new Currency(
                $app->config->get('currency', []),
                $app['cache']
            );
        });
    }
public function registerCurrency()
    {
        $this->app->singleton('currency', function ($app) {

            $this->app['events']->fire('currency.beforeRegister', [$this]);

            return new Currency(
                $app->config->get('currency', []),
                $app['cache']
            );
        });
    }
Register currency provider.

@return void