Create a checkout object

Checkout properties

Attributes	Data type	Description
merchant required	object	Merchant specific information. See details.
shipping required	object	The shipping details
billing	object	The billing details
items required	Array	An array of item.
discounts	object	A list of discount. Each discount must have their discount code.
metadata	object	See details.
order_id	string	The merchant order id. This is stored for your own future reference.
financing_program	string	A financing program applied on this checkout.
shipping_amount	integer	The total shipping amount in cents.
tax_amount	integer	The total tax amount in cents.
total required	integer	The total amount of the checkout in cents.
checkout_expiration	timestamp	A date-timestamp of when the `checkout_id` will expire. ISO timestamp format No milliseconds