Offers

[vikiival]

Basically there is a ton of edge cases.

but the most crucial ones:

• what to do with withdrawn offer? (remove or just update?)
• what to do on accept offer? (// may status to accepted to true 🤷 )
• add current_owner to offers? (if not removed could be nice for analytics)

ref galacticcouncil/Basilisk-node#424