future-public: add kline request

src/LaravelBitunixApi.php

@@ -2,4 +2,34 @@
 
 namespace Msr\LaravelBitunixApi;
 
-class LaravelBitunixApi {}
+use GuzzleHttp\Client;
+use Msr\LaravelBitunixApi\Requests\FutureKLineRequestContract;
+use Psr\Http\Message\ResponseInterface;
+
+class LaravelBitunixApi implements FutureKLineRequestContract
+{
+    private Client $publicFutureClient;
+
+    public function __construct()
+    {
+        $this->publicFutureClient = new Client([
+            'base_uri' => config('bitunix-api.future_base_uri') . '/api/v1/futures/market/',
+        ]);
+    }
+
+    public function getFutureKline(string $symbol, string $interval, int $limit = 100, ?int $startTime = null, ?int $endTime = null, string $type = 'LAST_PRICE'): ResponseInterface
+    {
+        $response = $this->publicFutureClient->get('kline', [
+            'query' => [
+                'symbol' => $symbol,
+                'interval' => $interval,
+                'limit' => $limit,
+                'startTime' => $startTime,
+                'endTime' => $endTime,
+                'type' => $type,
+            ]
+        ]);
+
+        return $response;
+    }
+}