If Stripe is not using the same currency as the payment was made we need to...

If Stripe is not using the same currency as the payment was made we need to convert the fees/net amounts back to the CiviCRM currency

CRM/Core/Payment/Stripe.php

@@ -686,8 +686,15 @@ class CRM_Core_Payment_Stripe extends CRM_Core_Payment {
             $errorMessage = $this->handleErrorNotification($err, $params['stripe_error_url']);
             throw new \Civi\Payment\Exception\PaymentProcessorException('Failed to retrieve Stripe Balance Transaction: ' . $errorMessage);
           }
-          $newParams['fee_amount'] = $stripeBalanceTransaction->fee / 100;
-          $newParams['net_amount'] = $stripeBalanceTransaction->net / 100;
+          if (($stripeCharge['currency'] !== $stripeBalanceTransaction['currency'])
+              && (!empty($stripeBalanceTransaction['exchange_rate']))) {
+            $newParams['fee_amount'] = ($stripeBalanceTransaction->fee / $stripeBalanceTransaction['exchange_rate']) / 100;
+            $newParams['net_amount'] = ($stripeBalanceTransaction->net / $stripeBalanceTransaction['exchange_rate']) / 100;
+          }
+          else {
+            $newParams['fee_amount'] = $stripeBalanceTransaction->fee / 100;
+            $newParams['net_amount'] = $stripeBalanceTransaction->net / 100;
+          }
           // Success!
           // Set the desired contribution status which will be set later (do not set on the contribution here!)
           $params['contribution_status_id'] = CRM_Core_PseudoConstant::getKey('CRM_Contribute_BAO_Contribution', 'contribution_status_id', 'Completed');