This endpoint will modify a pending award transaction . There will be no change in the status of the transaction. However, the value of the attributes may change. You are not allowed to change a transaction that has already been approved or rejected.
The idParam for purchase activity will be order_id, but if you have created any unique transaction attribute like serial_number, invoice_number, etc., then place it as an idParam.
To create unique transaction attribute, write to us at [email protected].