fix: batchOrder json does not support booleans

Author: claudeenriquez

src/kraken/futures/trade.py

@@ -20,6 +20,7 @@
 
 from __future__ import annotations
 
+import json
 from typing import Self
 
 from kraken.base_api import FuturesClient, defined
@@ -239,7 +240,7 @@ def create_batch_order(
             }
         """
         batchorder: dict = {"batchOrder": batchorder_list}
-        params = {"json": f"{batchorder}"}
+        params = {"json": json.dumps(batchorder)}
         if processBefore:
             params["processBefore"] = processBefore
 

tests/futures/test_futures_trade.py

@@ -198,6 +198,16 @@ def test_create_batch_order(futures_demo_trade: Trade) -> None:
                         "limitPrice": 2.00,
                         "stopPrice": 3.00,
                     },
+                    {
+                        "order": "send",
+                        "order_tag": "3",
+                        "orderType": "post",
+                        "symbol": "PI_XBTUSD",
+                        "side": "buy",
+                        "size": 5,
+                        "limitPrice": 1.00,
+                        "reduceOnly": True,
+                    },
                 ],
                 processBefore="3033-11-08T19:56:35.441899Z",
             ),