修改问诊退款回调，只有退款成功，才会推送消息

extend/Kuaidi100/Kuaidi.php

@@ -40,12 +40,12 @@ class Kuaidi
      * @return mixed
      * @throws GuzzleException
      */
-    protected function httpRequest(string $path, array $arg = []): mixed
+    protected function httpRequest(string $path, string $arg = []): mixed
     {
         $option = [
-            "headers" => [
-                "sign" => config("ca.app_id"),
-                "signature" => $this->getRequestSign($arg),
+            "json" => [
+                "schema" => "json",
+                "param" => json_encode($params, JSON_UNESCAPED_UNICODE),
             ],
         ];
 
@@ -75,8 +75,16 @@ class Kuaidi
         return $body['body'];
     }
 
-    protected function getSign(string $data){
-        $sign = md5($data . config("kuaidi100.key") . config("kuaidi100.customer"));
+    /**
+     * 获取签名
+     * @param string $params
+     * @return string
+     */
+    protected function getSign(string $params): string
+    {
+        return md5($params . config("kuaidi100.key") . config("kuaidi100.customer"));
     }
 
+    public function
+
 }