For Locked Listings, the way I see it - There are two distinct situations with Locked Listings.
- Already locked - someone tries to list a token that is already locked. This ideally should be checked and prohibited at time of listing. We plan to
- Subsequently Locked - Someone lists an unlocked token and then subsequently locks it. There are two ways to handle this. a) Check when a sale is about to happen, notify parties that the token could not be sold and remove the listing if it is locked. b) periodically check the open listings for tokens that are locked (either by polling or by ABI event) and automatically unlock them.
Our platform right now supports 2.A. which probably handles 70-90% - especially for sub-floor listings. We plan on adding in 1 later this month. 2B is a bit trickier and we do not have a date but we also think it may be fully mitigated by 2A. And if there is a nefarious party doing this, we have other mechanisms that can handle that.