The value of the order’s transaction identification number returned by PayPal.
Character length and limits: 19 single-byte characters maximum.

Amount to authorize.
Limitations: Value is a positive number which cannot exceed $10,000 USD in any currency. No currency symbol. Must have two decimal places, decimal separator must be a period (.), and the optional thousands separator must be a comma (,)

Type of transaction to authorize. The only allowable value is Order, which means that the transaction represents a customer order that can be fulfilled over 29 days.

A three-character currency code. See Currency Codes.