contract id

[cymqqqq]

Hi, in this function "async fn deploy_plug_bucket(contract_id: Principal, cycles: u64) {"
the input parameter 'contract_id': Is it a canister id or plug address?

[qti3e]

It's a canister id.

[cymqqqq]

Hello, I'm here again.
So the problem is how to deploy the cap-root canister in the local environment.
I read the code snippet of lib.rs in cap-root canister:
#[init]
fn init(contract: Principal, writers: BTreeSet) {
let data = ic::get_mut::();
data.cap_id = ic::caller();
data.bucket = Bucket::new(contract, 0);
data.writers = writers;
}
and
"dfx deploy cap-root --argument '(principal "", vec {})'" is not work.
Error: Failed while trying to deploy canisters.
Caused by: Failed while trying to deploy canisters.
Failed while trying to install all canisters.
Failed to install wasm module to canister 'cap-root'.
Failed to install wasm in canister 'rrkah-fqaaa-aaaaa-aaaaq-cai'.
Failed to install wasm.
The Replica returned an error: code 5, message: "Canister rrkah-fqaaa-aaaaa-aaaaq-cai trapped explicitly: Custom(No more values on the wire, the expected type principal is not opt, reserved or null)"

So, how to fix it?