feat:修改下单问题

@@ -108,6 +108,7 @@ class Order
         /** @var SymbolInfo $symbolInfo */
         $symbolInfo = $symbolInfos[$this->symbol];
         $order = [
+            'category' => 'linear',
             'symbol' => $symbol,
             'qty' => round($this->qty, $symbolInfo->qtyPrec),
             'price' => round($this->price, $symbolInfo->pricePrec),
@@ -119,6 +120,7 @@ class Order
         }
         if ($this->ordType == "LIMIT") {
             $order['timeInForce'] = "GTC";
+            $order['orderType'] = "Limit";
         }
         if ($this->ordType == "IOC") {
             $order['timeInForce'] = "IOC";
@@ -130,11 +132,11 @@ class Order
             $order['side'] = "Sell";
         }
         if ($this->posSide == "LONG") {
-            $order['positionIdx'] = "1";
+            $order['positionIdx'] = 1;
         } else if ($this->posSide == "SHORT") {
-            $order['positionIdx'] = "2";
+            $order['positionIdx'] = 2;
         } else {
-            $order['positionIdx'] = "0";
+            $order['positionIdx'] = 0;
         }
         return $order;
     }