future-private: add placePositionTpSlOrder request

src/Requests/PlacePositionTpSlOrderRequestContract.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Msr\LaravelBitunixApi\Requests;
+
+use Psr\Http\Message\ResponseInterface;
+
+interface PlacePositionTpSlOrderRequestContract
+{
+    /**
+     * Place Position TP/SL Order
+     * When triggered, it will close the position at market price based on the position quantity at that time.
+     * Each position can only have one Position TP/SL Order
+     *
+     * @param  string  $symbol  Trading pair
+     * @param  string  $positionId  Position ID associated with take-profit and stop-loss
+     * @param  string|null  $tpPrice  Take-profit trigger price
+     * @param  string|null  $tpStopType  Take-profit trigger type (LAST_PRICE/MARK_PRICE)
+     * @param  string|null  $slPrice  Stop-loss trigger price
+     * @param  string|null  $slStopType  Stop-loss trigger type (LAST_PRICE/MARK_PRICE)
+     */
+    public function placePositionTpSlOrder(
+        string $symbol,
+        string $positionId,
+        ?string $tpPrice = null,
+        ?string $tpStopType = null,
+        ?string $slPrice = null,
+        ?string $slStopType = null
+    ): ResponseInterface;
+}