Checkout Model

How the buyer wants to pay, and that they accept the Terms.

airwallex is cards and international methods in USD; xendit is the Indonesian methods (QRIS, virtual accounts, e-wallets) in IDR. The method is ignored for a $0 checkout; the acceptance is not.

accept_terms is the checkout's ticked box — the Terms of Service and the Product Terms, and that purchases are final — and terms_version the version the page showed (legalVersion on the website). Without both, and the version current, the checkout is refused with TERMS_NOT_ACCEPTED or TERMS_OUTDATED; with them, the acceptance is recorded with the order.