Handle http status 5xx error

appstore/model.go

@@ -163,7 +163,6 @@ type (
 		SubscriptionRetryFlag          string `json:"is_in_billing_retry_period,omitempty"`
 	}
 
-
 	// The HttpStatusResponse struct contains the status code returned by the store
 	// Used as a workaround to detect when to hit the production appstore or sandbox appstore regardless of receipt type
 	StatusResponse struct {

appstore/validator.go

@@ -125,7 +125,7 @@ func (c *Client) Verify(ctx context.Context, reqBody IAPRequest, result interfac
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode >= 500 {
-		return fmt.Errorf("Received http status code %d from the App Store: %w", resp.StatusCode, ErrAppStoreServer)
+		return "", fmt.Errorf("Received http status code %d from the App Store: %w", resp.StatusCode, ErrAppStoreServer)
 	}
 	return c.parseResponse(resp, result, ctx, reqBody)
 }