Bid on an Item Screen:

 

 

 

 

Validations:

 

• If a user has placed an item for bid, he cannot bid on that item.
• If a user1 has bid on a Item1 with value =$200, user2 cannot bid on that item with value less than $200.
• If a user is bidding on an item, user2 cannot bid on the same item simultaneously. Locking feature has been implemented, which does not allow user2 to access unless user1 releases the lock. If  user1 has accidently locked it and  forgot to release the lock. System will automatically release the lock for user1 after 3 mins.