Q: Does Vendors have different roles than users? I mean, If a user want to buy, and then wants to sell items.
A: Yes, vendors are different from users. Vendors are the sellers whose products are displayed at the admin store for selling. they can view their orders, their transaction history, their balances etc. Users are the customers who buy products from the eCommerce store. If a user wants to buy and then sell that item he has to get himself registered as vendor with the admin. Without registration as a vendor a user cannot sell his product.