Is there a way to set up a canister such that it refuses any cycle top-ups from external parties? If there is such a way, why should I delete a canister instead of just black hole-ing it? Let’s say I want to spin down a canister, here are the following steps for: 1. Deleting a Canister Transfe…

If a canister is cycle drained, it doesnt get immediately deleted. There is a grace period. What if you wanted your canister to get immediately deleted?

Right, but if your canister is cycle drained (can’t perform actions or respond to requests) black holed (can’t be accessed or updated), and has no way of being topped up - isn’t your canister essentially the same as being deleted for all intensive purposes?

Maybe a usecase for deletion is if you wanted to have compassion for the canister and put it out of it’s misery, rather than leaving it in that existential limbo that you describe :smile:

I thought you could provide a refund address when you delete the canister for the left over cycles.

[image] skilesare: I thought you could provide a refund address when you delete the canister for the left over cycles. Is there any documentation for this? I don’t see a delete_canister refund address as part of the API. See the following IC management canister methods from the Interface S…

Maybe it was a post from someone suggesting it be added.

There’s another reason for not wanting to actually delete your canisters: you can always re-use them, without having to pay 0.1T for each canister_create. I believe unistall_code should make them consume 0 cycles (need confirmation on that), and you’d still be able to re-install using the same priva…

But isn’t all data removed as well? And if so, whats the point of the grace period then?

Right, this is to the wallet canister, not a user specified canister - so better to use transfer_cycles beforehand if you want control of where your cycles end up.

Deleting a canister vs. Cycle Drain + Black Hole-ing it

Developers

simdi.jinkins May 23, 2022, 1:07pm 10

@icme
As of dfx 0.8.4, cycles are automatically transferred to wallet when running dfx delete canister
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Deleting a canister vs. Cycle Drain + Black Hole-ing it

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