| Name | Type | Description | Notes |
|---|---|---|---|
| order_id | string | This order ID in grab system. | |
| merchant_id | string | This merchant ID in grab system. | |
| is_full_refund | bool | currently we only support fully refund. | [optional] |
| refund_amount_in_min | int | The total amount the POS want to refund for STO order. | [optional] |