feat：修复杠杆设置报错

@@ -18,11 +18,12 @@ $restHost = "http://bbapi.keetu.com";
 $broker = new CmBroker(CmBroker::PLAT_BYBIT, $apiInfo, $wsHost, $restHost);
 
 output("开始监听");
-$broker->accListen(function (WsData $data) {
-    if ($data->dataType == "order") {
-        var_dump($data);
-    }
-});
+// $broker->accListen(function (WsData $data) {
+//     if ($data->dataType == "order") {
+//         var_dump($data);
+//     }
+// });
+$broker->setLever("BTCUSDT", 20);
 // $broker->klineListen("BTCUSDT", "1m", function ($data) {
 //     output($data->toArray());
 // });

@@ -62,6 +62,13 @@ class Api
     // 设置杠杆
     public function setLeverage($param)
     {
+        // 确保杠杆值为字符串类型
+        if (isset($param['buyLeverage'])) {
+            $param['buyLeverage'] = (string)$param['buyLeverage'];
+        }
+        if (isset($param['sellLeverage'])) {
+            $param['sellLeverage'] = (string)$param['sellLeverage'];
+        }
         $path = '/v5/position/set-leverage';
         $method = 'POST';
         return $this->request($path, $method, $param, true);
@@ -79,27 +86,16 @@ class Api
     private function createSign($timestamp, $method, $path, $params = [])
     {
         $recv_window = '5000';
-        $queryString = '';
-        $postBody = '';
+        $sign_str = $timestamp . $this->apiInfo->key . $recv_window;
 
         if ($method == 'GET' && !empty($params)) {
-            ksort($params);
-            $queryString = http_build_query($params);
-        }
-        if ($method == 'POST' && !empty($params)) {
-            ksort($params);
-            $postBody = json_encode($params);
+            $sign_str .= http_build_query($params);
+        } else if ($method == 'POST' && !empty($params)) {
+            $sign_str .= json_encode($params);
         }
 
-        $sign_str = $timestamp . $this->apiInfo->key . $recv_window . $path;
-        if ($queryString) {
-            $sign_str .= '?' . $queryString;
-        }
-        if ($postBody) {
-            $sign_str .= $postBody;
-        }
-
-        return hash_hmac('sha256', $sign_str, $this->apiInfo->secret);
+        $sign = hash_hmac('sha256', $sign_str, $this->apiInfo->secret);
+        return $sign;
     }
 
     private function request($path, $method, $param, $auth = false)
@@ -125,7 +121,6 @@ class Api
 
         $url = $this->host . $path;
         $result = "";
-
         if ($method == 'POST') {
             $result = Curl::httpPost($url, $param, $header);
         } else {