Same max amount bid

-- HikaShop version -- : 6.3.0
-- HikaAuction version -- : 5.0.1
-- Joomla version -- : 6
-- PHP version -- : 8.4

Hello Team

Max amount bid is allowing same amount for 2 different buyers, see video: drive.google.com/file/d/1_Cr4sPbLWim51pt...jjO/view?usp=sharing

Thank you

Hi,

Thank you for reporting this. After investigation, allowing two different bidders to place the same maximum bid amount is actually normal and expected behavior in a Vickrey auction. When this happens, the first bidder to have placed that amount wins (first-come-first-served). This is already how HikaAuction handles it.

However, your report helped us identify a related bug: when two bids are exactly equal, the Vickrey price calculation was adding the bid increment on top of the tied amount, which could result in a winning price higher than what either bidder actually bid. For example, if both bidders placed a maximum bid of €100 with a €5 increment, the displayed winning price would incorrectly show €105.

This has been fixed for the next release and the winning price will now be correctly capped so it never exceeds the actual highest bid.

Thank you Nicolas, always happy to report things to improve

do you think it would be a good idea to notify the second bidder maybe implementing a pop-up notification or a similar alert when this occurs please?

Thank you

Hi,

Thank you for the suggestion! After consideration, we think adding a specific notification for tied bids would actually go against the Vickrey auction principle. It would reveal to the second bidder that someone else placed the exact same maximum amount, which leaks information about another bidder's secret maximum bid.

The current behavior already provides the right feedback: after placing the bid, the bidder will see that they are losing the auction, which naturally encourages them to place a higher bid. This keeps maximum bids confidential while still guiding the user.

Thank you Nicolas,

I was talking to trigger the notification after the same bid was placed (but I understand it could be redundant)

Hi,

You're right, I understand better! Since the notification would be after the bid is placed, it wouldn't reveal anything the bidder doesn't already know. However, the page already displays "You are losing the auction" after the redirect, and with live bid updates enabled ( in the next version, which will be released soon ) this status also refreshes automatically, so we think an additional popup would be redundant for what is a rare edge case. But thank you for thinking it through!

Thank you Nicolas!

Hello again

I noticed that when multiple users place the same maximum bid amount, the system currently displays the most recent bid at the top of the list. However, even if this most recent bid is not the winning one, it is still being prioritized in the view. The system should be updated to ensure that the actual winning bid is always positioned at the top when bid amounts are identical see video

Thank you

Hi Luca,

Thanks for reporting this. You're right; when two bids had the same amount, the history was showing the most recent bid first, which made it look like the wrong bidder was winning.

This is now fixed and will be in the next release (6.0.1). The earliest bid now correctly appears first in the history when amounts are tied, matching the first-come-first-served rule.

Download the install package on our website and install it on yours to get the patch.

Thank you Nicolas I appreciate the help .