400 Bad Request from Conversion endpoint when the winner has been chosen

[momasz]

I am getting 400 Bad Request from /convert endpoint after the winner of my experiment has been chosen.

I am aware that an experiment should be deleted after the winner is selected https://github.com/seatgeek/sixpack#production-notes BUT would not it be better if /convert endpoint responded with some more friendly information like can not convert an experiment that ended?

or at least, to provide some additional parameter inside /participate endpoint which can tell us that the winner for this experiment has been chosen, ex:

{
    "status": "ok",
    "alternative": {
        "name": "redirect"
    },
    "experiment": {
        "name": "registration"
    },
    "client_id": "100",
    "winnerSelected": true
}

any thoughts on this?