title: Amount
type: string
pattern: '^([0]|([1-9][0-9]{0,17}))([.][0-9]{0,3}[1-9])?$'
description: >-
  The API data type Amount is a JSON String in a canonical format that is
  restricted by a regular expression for interoperability reasons. This pattern
  does not allow any trailing zeroes at all, but allows an amount without a
  minor currency unit. It also only allows four digits in the minor currency
  unit; a negative value is not allowed. Using more than 18 digits in the major
  currency unit is not allowed.
example: '123.45'