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Remove bounds from PrevalidateAttests struct definition #2886

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merged 3 commits into from
Jan 9, 2024
Merged

Remove bounds from PrevalidateAttests struct definition #2886

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ec26d46
Make PrevalidateAttests Send + Sync and remove bounds
ggwpez Jan 9, 2024
7cb1ed6
Add prdoc
ggwpez Jan 9, 2024
cfaf278
Update polkadot/runtime/common/src/claims.rs
ggwpez Jan 9, 2024
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16 changes: 10 additions & 6 deletions polkadot/runtime/common/src/claims.rs
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Expand Up @@ -591,11 +591,9 @@ impl<T: Config> Pallet<T> {
/// otherwise free to place on chain.
#[derive(Encode, Decode, Clone, Eq, PartialEq, TypeInfo)]
#[scale_info(skip_type_params(T))]
pub struct PrevalidateAttests<T: Config + Send + Sync>(sp_std::marker::PhantomData<T>)
where
<T as frame_system::Config>::RuntimeCall: IsSubType<Call<T>>;
pub struct PrevalidateAttests<T>(core::marker::PhantomData<fn(T)>);
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Not sure we really need this :P

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@ggwpez ggwpez Jan 9, 2024 •
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WDYM? The PhantomData<fn(T)>?

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Yes

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But if i use PhantomData<T> then its not Send + Sync and if i remove the PD then it errors parameter T is never used.
Signed Extension does require it though.

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Why does it needs to be Send and Sync?

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The SignedExtension trait requires it, i did not check why.
The new TEs will also require it.


impl<T: Config + Send + Sync> Debug for PrevalidateAttests<T>
impl<T: Config> Debug for PrevalidateAttests<T>
where
<T as frame_system::Config>::RuntimeCall: IsSubType<Call<T>>,
{
Expand All @@ -610,7 +608,7 @@ where
}
}

impl<T: Config + Send + Sync> PrevalidateAttests<T>
impl<T: Config> PrevalidateAttests<T>
where
<T as frame_system::Config>::RuntimeCall: IsSubType<Call<T>>,
{
Expand All @@ -620,7 +618,7 @@ where
}
}

impl<T: Config + Send + Sync> SignedExtension for PrevalidateAttests<T>
impl<T: Config> SignedExtension for PrevalidateAttests<T>
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If you would just kept the bounds here, it would have been enough.

But we can go with the phantomdata trick.

where
<T as frame_system::Config>::RuntimeCall: IsSubType<Call<T>>,
{
Expand Down Expand Up @@ -1469,6 +1467,12 @@ mod tests {
);
});
}

#[test]
fn prevalidate_assets_is_send_and_sync() {
fn is_send_and_sync<T: Send + Sync>() {}
is_send_and_sync::<PrevalidateAttests<Test>>();
}
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}

#[cfg(feature = "runtime-benchmarks")]
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13 changes: 13 additions & 0 deletions prdoc/pr_2886.prdoc
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@@ -0,0 +1,13 @@
# Schema: Polkadot SDK PRDoc Schema (prdoc) v1.0.0
# See doc at https://raw.githubusercontent.com/paritytech/polkadot-sdk/master/prdoc/schema_user.json

title: Remove bounds from `PrevalidateAttests` struct definition

doc:
- audience: Runtime Dev
description: |
Minimal change to `PrevalidateAssets` to remove some trait bounds on the struct itself while
keeping all its capabilities.

crates:
- name: polkadot-runtime-common