Great work!
"which you can return to yourself anytime"
Could you let delegator select timeframe in which your service would make a call to return the delegation?
Great work!
"which you can return to yourself anytime"
Could you let delegator select timeframe in which your service would make a call to return the delegation?
No. (Un-)delegation requires your active key, you have to do that manually. Please check if the new user made some SP herself before you take it back.
Also, you will need @jesta's Vessel (linked in the op), as steeminvite forgets about created accounts immediately.