add refund and event logic

app/Http/Requests/Refunds/RefundDecisionRequest.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Http\Requests\Refunds;
+
+use App\Http\Requests\ApiFormRequest;
+use App\Models\Refund;
+
+class RefundDecisionRequest extends ApiFormRequest
+{
+    public function authorize(): bool
+    {
+        return $this->user() !== null;
+    }
+
+    public function rules(): array
+    {
+        return [
+            'status' => ['required', 'string', 'in:' . implode(',', [
+                Refund::STATUS_APPROVED,
+                Refund::STATUS_REJECTED,
+            ])],
+            'reason' => ['required', 'string', 'max:2000'],
+        ];
+    }
+}