NewAliPayResult converts ali payment result.

NewAliWebhookResult builds PaymentResult from alipay webhook notification.

NewConfirmationResult confirms an order based on the payment result and current membership.

NewWxPayResult creates a new PaymentResult from the result of querying wechat order.

NewWxWebhookResult builds PaymentResult from wechat pay webhook notification.

StmtConfirmOrder build SQL to set an order confirmed.

StmtCreateOrder a new order.

StmtLockOrder locks a row to retrieve onl the minimal fields used to determine whether the order is confirmed.

StmtOrderHeader retrieves the first half of an order to circumvent the problem of oversize packet transfer between db and server.

ConfirmationParams contains data used to invoice an order.

ConfirmationResult contains all the data in the process of confirming an order.

DiscountRedeemed records user's redemption history of non-recurring discount.

FtcCartParams contains the item user want to buy.

LockedOrder lock a row of order and retrieves the minimal data.

Order contains the details of a user's action to place an order.

PaymentResult unifies ali and wx webhook payload, or query order.

PurchasedTimeParams is used to deduce an order's purchase period.