first upload all files

Modules/Currency/Providers/CurrencyExchangeRateServiceProvider.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace Modules\Currency\Providers;
+
+use Swap\Builder;
+use Illuminate\Support\ServiceProvider;
+use Modules\Currency\Services\CurrencyRateExchanger;
+
+class CurrencyExchangeRateServiceProvider extends ServiceProvider
+{
+    /**
+     * Bootstrap any application services.
+     *
+     * @return void
+     */
+    public function boot()
+    {
+        if (! config('app.installed')) {
+            return;
+        }
+
+        $this->setupCurrencyRateExchangeService();
+
+        $this->app->singleton(CurrencyRateExchanger::class, function () {
+            $service = setting('currency_rate_exchange_service', 'array');
+            $options = config("fleetcart.modules.currency.config.services.{$service}");
+
+            $swap = (new Builder)->add($service, $options)->build();
+
+            return new CurrencyRateExchanger($swap);
+        });
+    }
+
+    /**
+     * Setup currency rate exchange service.
+     *
+     * @return void
+     */
+    private function setupCurrencyRateExchangeService()
+    {
+        config([
+            'fleetcart.modules.currency.config.services.fixer.access_key' => setting('fixer_access_key'),
+            'fleetcart.modules.currency.config.services.forge.api_key' => setting('forge_api_key'),
+            'fleetcart.modules.currency.config.services.currency_data_feed.api_key' => setting('currency_data_feed_api_key'),
+        ]);
+    }
+}