Update paypal fee handling

Author: MichalGallovic

config/checkout.php

@@ -48,11 +48,6 @@
         'fixed_fee' => env('CHECKOUT_STRIPE_FIXED_FEE', 30)
     ],
 
-    'paypal' => [
-        'percentage_fee' => env('CHECKOUT_PAYPAL_PERCENTAGE_FEE', 2.9 / 100),
-        'fixed_fee' => env('CHECKOUT_PAYPAL_FIXED_FEE', 30)
-    ],
-
     /*
      * Shipping city and state is automatically resolved from zip code
      * using GeoNames service http://www.geonames.org/

src/Models/OrderPurchase.php

@@ -54,7 +54,7 @@ public static function makeOne(array $data, CustomerContract $customer)
             $purchase->paypal_authorization_id = $data['paypal_authorization_id'];
             $purchase->paypal_capture_id = $data['paypal_capture_id'];
             $purchase->paypal_payer_id = $data['paypal_payer_id'];
-            $purchase->paypal_fee = ceil($purchase->amount * config('checkout.paypal.percentage_fee')) + config('checkout.paypal.fixed_fee');
+            $purchase->paypal_fee = $data['paypal_fee'];
         }
 
         $purchase->save();

src/PaypalPaymentHandler.php

@@ -5,6 +5,7 @@
 use PayPalCheckoutSdk\Core\PayPalHttpClient;
 use PayPalCheckoutSdk\Orders\OrdersGetRequest;
 use PayPalCheckoutSdk\Payments\AuthorizationsCaptureRequest;
+use PayPalCheckoutSdk\Payments\CapturesGetRequest;
 use R64\Checkout\Contracts\Customer;
 use R64\Checkout\Contracts\Customer as CustomerContract;
 use R64\Checkout\Contracts\PaymentHandler;
@@ -43,6 +44,8 @@ public function purchase(array $order, array $paymentDetails, Customer $customer
             throw new PaymentException("Paypal Capture failed");
         }
 
+        $captureResponse = $this->captureDetails($this->getPaypalCaptureId($captureResponse));
+
         return $this->recordPurchase($paymentDetails, $order, $orderResponse, $captureResponse, $customer);
     }
 
@@ -100,6 +103,15 @@ protected function getPaypalCaptureId(\PayPalHttp\HttpResponse $response): strin
         return $response->result->id;
     }
 
+    /**
+     * @param \PayPalHttp\HttpResponse $response
+     * @return string
+     */
+    protected function getFee(\PayPalHttp\HttpResponse $response): string
+    {
+        return (int) (((float) $response->result->seller_receivable_breakdown->paypal_fee->value) * 100);
+    }
+
     /**
      * @param array $paymentDetails
      *
@@ -112,6 +124,12 @@ protected function capture(array $paymentDetails)
         return $this->client->execute($request);
     }
 
+    protected function captureDetails($captureId)
+    {
+        $request = new CapturesGetRequest($captureId);
+        return $this->client->execute($request);
+    }
+
     protected function recordPurchase(array $paymentDetails, array $order, $orderResponse, $captureResponse, CustomerContract $customer)
     {
         $customerId = \R64\Checkout\Facades\Customer::getForeignKey();
@@ -126,6 +144,7 @@ protected function recordPurchase(array $paymentDetails, array $order, $orderRes
             'paypal_authorization_id' => $paymentDetails['authorization_id'],
             'paypal_capture_id' => $this->getPaypalCaptureId($captureResponse),
             'paypal_payer_id' => $this->getPaypalPayerId($orderResponse),
+            'paypal_fee' => $this->getFee($captureResponse)
         ], $customer);
     }
 }