Laravel eloquent selectRaw for SQL注入

我有疑问:

$typeCancel = 'cancel'; $typeRefund = 'refund';
$query = Order::select(DB:raw('order.*,'
    "IF (order.type IN (?, ?), (order.amount * -1), order.amount) AS custom_amount"))
->where('provider', 1)
->setBindings([$typeCancel, $typeRefund], 'select')
->get();

这很有效。 我该如何做:

... IF (order.type IN (?) ...
... ->setBindings([$types], 'select')

我尝试以下方法:

$types = "'{$typeCancel}','{$typeRefund}'";
... IF (order.type IN (?) ...
... ->setBindings([$types], 'select')

但它不正确,结果查询如下所示:

... IF (order.type IN ("'cancel','refund'") ...