Controllers of canister that has fun out of cycles

Developers
1
  1. What happens to the controllers of a canister that has run out of cycles? Are they also garbage-collected like the code and memory? I assume not.
  2. Is there a limit on the number of controllers a canister can have?
1 Like
2

The interface spec covers the answers to both questions.

What happens to the controllers of a canister that has run out of cycles? Are they also garbage-collected like the code and memory? I assume not.

From the uninstall_code method section (which will happen automatically when the canister has run out of cycles):

A canister after uninstalling retains its cycle balances, controllers , history, status, and allocations.

Is there a limit on the number of controllers a canister can have?

From the create_canister section:

controllers (vec principal)

A list of at most 10 principals. The principals in this list become the controllers of the canister. Note that the caller of the create_canister call is not a controller of the canister unless it is a member of the controllers list.

5 Likes