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I would like to schedule the dispatch call authorize_upgrade inside a custom pallet. For this I need the call enum variant of the cumulus_pallet_parachain_system pallet. How can I get this? Via the config parameters?

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cumulus_pallet_parachain_system::Call::<T>::authorize_upgrade { code_hash }

This gives you access in your pallet to the parachain system Call. T needs to implement cumulus_pallet_parachain_system::Config.

In your config you need to add:

trait Config {
... 
    type Call: From<cumulus_pallet_parachain_system::Call> + frame_support::dispatch::Dispatchable;
... 
}

This is required to be able to convert the parachain system call into the runtime call and to dispatch the call.

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  • Do I need to tightly couple cumulus_pallet_parachain_system::Config to my pallet? Do you have an example? I can't get it working. How to call the authorize_upgrade with your Call parameter inside my pallet. How to set the config parameter in the runtime?
    – Chralt
    Commented Jan 15, 2023 at 16:44
  • Got it with your help. It is exactly as you described, but I didn't know that I can just pass in the whole Call struct of the runtime (type Call = Call;). I tightly coupled it with + cumulus_pallet_parachain_system::Config. Thanks a lot Bastian!
    – Chralt
    Commented Jan 15, 2023 at 16:57
  • Good to hear that you made it :)
    – bkchr
    Commented Jan 15, 2023 at 22:39

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