Upgrading canisters deployed via code

Developers
1

My project involves a canister of type A that deploys other canisters of type B, C, D. Canister A manages and keeps track of multiple canisters and deploys them at the user’s request (through code).

pub async fn deploy(bytecode: Vec<u8>) -> Result<Principal, String> {
    let management_canister = Principal::management_canister();

    let create_result: Result<(DeploymentResult,), _> = api::call::call_with_payment128(
            management_canister,
            "create_canister",
            (),
            200000000000u128,
        )
        .await;

    let create_result = match create_result {
            Ok((result,)) => result,
            Err((code, msg)) => {
                ic_cdk::api::print(format!(
                    "Error creating canister: Code: {}, Message: {}",
                    code as u8, msg
                ));
                return Err(format!("Failed to create canister: {}: {}", code as u8, msg));
            }
        };

    let install_config = CanisterInstall {
        mode: InstallMode::Install,
        canister_id: create_result.canister_id,
        wasm_module: bytecode.clone(),
        arg: b" ".to_vec(),
    };

    match api::call::call(
            Principal::management_canister(),
            "install_code",
            (install_config,),
        )
        .await
        {
            Ok(x) => x,
            Err((code, msg)) => {
                return Err(format!(
                    "An error happened during the call: {}: {}",
                    code as u8, msg
                ))
            }
        };
    
    let id = create_result.canister_id.clone();
    Ok(id)
}

I haven’t found a way to upgrade the canisters deployed via this method. I can only upgrade the ones that were deployed via dfx deploy, which only includes canister A.

Is there any way to upgrade canisters that have been deployed via code?

2

You can do a ‘naked’ dfx canister install <canister id> --wasm <new wasm.wasm> if your principal dfx identity get-principal is a controller of the canister. Or you could instruct A to call install_code with mode: upgrade using the new wasm

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