- The auction system is based on a few simple requirements.
- There are multiple users of the system.
- Users must login to use the system.
- Users can be added but not removed.
- Users create new items and bid on items.
- The auctions are open; users see all known items and bids.
- Auctions have a fixed finishing time.
- Bids on items for sale must be increasing.
- Users should be notified when a new bid is posted to their item.
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