diff --git a/app/Billing/StripePaymentGateway.php b/app/Billing/StripePaymentGateway.php
new file mode 100644
index 0000000..6f5a988
--- /dev/null
+++ b/app/Billing/StripePaymentGateway.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Billing;
+
+use Stripe\Charge;
+
+class StripePaymentGateway implements PaymentGateway
+{
+    private $apiKey;
+
+    public function __construct($apiKey)
+    {
+        $this->apiKey = $apiKey;
+    }
+
+    public function charge($amount, $token)
+    {
+        Charge::create([
+            'amount' => $amount,
+            'source' => $token,
+            'currency' => 'usd',
+        ], ['api_key' => $this->apiKey]);
+    }
+}
diff --git a/tests/unit/Billing/StripePaymentGatewayTest.php b/tests/unit/Billing/StripePaymentGatewayTest.php
index 07fb0fb..119c160 100644
--- a/tests/unit/Billing/StripePaymentGatewayTest.php
+++ b/tests/unit/Billing/StripePaymentGatewayTest.php
@@ -1,5 +1,6 @@
 <?php
 
+use App\Billing\StripePaymentGateway;
 use Illuminate\Foundation\Testing\WithoutMiddleware;
 use Illuminate\Foundation\Testing\DatabaseMigrations;
 use Illuminate\Foundation\Testing\DatabaseTransactions;
@@ -10,7 +11,7 @@ class StripePaymentGatewayTest extends TestCase
     function charges_with_a_valid_payment_token_are_successful()
     {
         // Create a new StripePaymentGateway
-        $paymentGateway = new StripePaymentGateway;
+        $paymentGateway = new StripePaymentGateway(config('services.stripe.secret'));
 
         $token = \Stripe\Token::create([
             "card" => [