Purchase unit for payment eligibility.
amountobject<amount_with_breakdown>Optionalcurrency_codestring<currency_code>RequiredvaluestringRequiredbreakdownobject<amount_breakdown>Optionalitem_totalobject<money>Optionalcurrency_codestring<currency_code>RequiredvaluestringRequiredshippingobject<money>Optionalcurrency_codestring<currency_code>RequiredvaluestringRequiredhandlingobject<money>Optionalcurrency_codestring<currency_code>RequiredvaluestringRequiredtax_totalobject<money>Optionalcurrency_codestring<currency_code>RequiredvaluestringRequiredinsuranceobject<money>Optionalcurrency_codestring<currency_code>RequiredvaluestringRequiredshipping_discountobject<money>Optionalcurrency_codestring<currency_code>RequiredvaluestringRequireddiscountobject<discount_with_breakdown>Optionalcurrency_codestring<currency_code>RequiredvaluestringRequiredpayeeobject<payee>Optionalemail_addressstring<email>OptionalNote: Up to 64 characters are allowed before and 255 characters are allowed after the@sign. However, the generally accepted maximum length for an email address is 254 characters. The pattern verifies that an unquoted@sign exists.
merchant_idstring<account_id-2>Optional