Transaction OrderPay

Authentication mode: Checked (known user, must have the privilege)

Database access mode: updating

pay for an order with money/credit card/...; see UseVoucher for using a voucher to pay

Inputs:

• orderid: int
  The order to be paid
• amount: int
  amount offered, it must be positive
• paytype: string
  the type of payment
• paydata: string
  additional data, like card number or date of bank transaction

Outputs:

• order: Order
  fresh copy of the order
• amount: int
  the amount actually taken, it is between 0 and at maximum the amount due for the order, it is never above the offered amount