fix:签名

@@ -66,14 +66,14 @@ class Request
 
         $body = $this->extract();
 
-        $this->signature($body);
+        $this->signature($body, Arr::get($config, 'secret'));
 
         return $body;
     }
 
-    private function signature(&$body)
+    private function signature(&$body, string $secret)
     {
-        $body['sign'] = Signature::make($body);
+        $body['sign'] = Signature::make($body, $secret);
     }
 
     private function paddingHead(array $config)

@@ -15,11 +15,11 @@ class Signature
         $this->item = $item;
     }
 
-    public static function make(array $items): string
+    public static function make(array $items, string $secret): string
     {
         $signature = new self($items);
 
-        return $signature->toString();
+        return $signature->toString($secret);
     }
 
     protected function sortByASCII()
@@ -58,15 +58,17 @@ class Signature
     }
 
     /**
+     * @param string $secret
+     *
      * @return string
      */
-    protected function toString(): string
+    protected function toString(string $secret): string
     {
         $this->sortByASCII();
 
         $string = $this->map($this->item, function ($k, $v) {
-            return !($v === '' || $v === null || $k === 'service');
-        });
+                return !($v === '' || $v === null);
+            }) . '&key=' . $secret;
 
         return self::encode($string);
     }