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Migrate parachain swaps to Coretime (#3714)

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This PR notifies broker pallet for any parachain slot swaps performed on
the relay chain. This is achieved by registering an `OnSwap` for the the
`coretime` pallet. The hook sends XCM message to the broker chain and
invokes a new extrinsic `swap_leases` which updates `Leases` storage
item (which keeps the legacy parachain leases).

I made two assumptions in this PR:
1.
[`Leases`](https://github.com/paritytech/polkadot-sdk/blob/4987d7982461e2e5ffe219cdf71ec697284cea7c/substrate/frame/broker/src/lib.rs#L120)
in `broker` pallet and
[`Leases`](https://github.com/paritytech/polkadot-sdk/blob/4987d7982461e2e5ffe219cdf71ec697284cea7c/polkadot/runtime/common/src/slots/mod.rs#L118)
in `slots` pallet are in sync.
2. `swap_leases` extrinsic from `broker` pallet can be triggered only by
root or by the XCM message from the relay chain. If not - the extrinsic
will generate an error and do nothing.

As a side effect from the changes `OnSwap` trait is moved from
runtime/common/traits.rs to runtime/parachains. Otherwise it is not
accessible from `broker` pallet.

Closes https://github.com/paritytech/polkadot-sdk/issues/3552

TODOs:

- [x] Weights
- [x] Tests

---------

Co-authored-by: command-bot <>
Co-authored-by: eskimor <eskimor@users.noreply.github.com>
Co-authored-by: Bastian Köcher <git@kchr.de>
This commit is contained in:
Tsvetomir Dimitrov
2024-03-26 17:54:24 +02:00
committed by GitHub
parent fd79b3b08a
commit 90234543f3
10 changed files with 461 additions and 322 deletions
Download Patch File Download Diff File Expand all files Collapse all files
substrate/frame/broker/src/dispatchable_impls.rs
+18
View File
@@ -437,4 +437,22 @@ impl<T: Config> Pallet<T> {
Self::deposit_event(Event::AllowedRenewalDropped { core, when });
Ok(())
}
pub(crate) fn do_swap_leases(id: TaskId, other: TaskId) -> DispatchResult {
let mut id_leases_count = 0;
let mut other_leases_count = 0;
Leases::<T>::mutate(|leases| {
leases.iter_mut().for_each(|lease| {
if lease.task == id {
lease.task = other;
id_leases_count += 1;
} else if lease.task == other {
lease.task = id;
other_leases_count += 1;
}
})
});
Ok(())
}
}