The classes involved in the system, as shown in the class
diagram in Figure 2, include buyer, seller, product,
order, payment, and account. The class diagram is base
d on the use case model and the use case specification.
The following presents the assumptions of the system.
1) Buyer class represents the list of
buyer registered to use the system.
2) Seller class represents the list of suppliers registered to use the site.
3) Products class represents the list of products being supplied by the sellers.
4) Order class represents the list of orders made by customers.
5) Payment represents the payment of goods order for by the buyer.
6) Account class represents recharging of account by buyers.