Feature and its Use Cases

Problem

English auction and similar ascending-price auctions do not enforce a minimum bid increment.
A bidder can call bid() with the exact same amount as the current highest bid,
replacing the previous highest bidder for no economic benefit and causing unnecessary gas costs and refund churn.

Expected Behavior

A bid must exceed the current highest bid by at least a configurable minBidIncrement (e.g., 1% or a fixed amount).

Suggested Fix

Add a constructor parameter uint256 minBidIncrement and enforce:

require(msg.value >= highestBid + minBidIncrement, "Bid too low");

Impact

Medium — enables griefing, spam bidding, and DOS-like behavior on active auctions.

Additional Context

No response

Code of Conduct

• I have joined the Discord server and will post updates there
• I have searched existing issues to avoid duplicates