fix receipt not uploading in expense

app/Http/Controllers/V1/Admin/Expense/UploadReceiptController.php

@@ -3,7 +3,7 @@
 namespace Crater\Http\Controllers\V1\Admin\Expense;
 
 use Crater\Http\Controllers\Controller;
-use Crater\Http\Requests\ExpenseRequest;
+use Crater\Http\Requests\UploadExpenseReceiptRequest;
 use Crater\Models\Expense;
 
 class UploadReceiptController extends Controller
@@ -15,7 +15,7 @@ class UploadReceiptController extends Controller
      * @param  Expense $expense
      * @return \Illuminate\Http\JsonResponse
      */
-    public function __invoke(ExpenseRequest $request, Expense $expense)
+    public function __invoke(UploadExpenseReceiptRequest $request, Expense $expense)
     {
         $this->authorize('update', $expense);
 

app/Http/Requests/UploadExpenseReceiptRequest.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace Crater\Http\Requests;
+
+use Crater\Rules\Base64Mime;
+use Illuminate\Foundation\Http\FormRequest;
+
+class UploadExpenseReceiptRequest extends FormRequest
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     *
+     * @return bool
+     */
+    public function authorize()
+    {
+        return true;
+    }
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array
+     */
+    public function rules()
+    {
+        return [
+            'upload_receipt' => [
+                'nullable',
+                new Base64Mime(['gif', 'jpg', 'png'])
+            ]
+        ];
+    }
+}