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Migrate pallet-timestamp to pallet attribute macro. #8078

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Feb 10, 2021

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shaunxw
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@shaunxw shaunxw commented Feb 9, 2021

Part of #7882.

Converts the Timestamp pallet to the new pallet attribute macro introduced in #6877.

Following the upgrade guidelines here: https://crates.parity.io/frame_support/attr.pallet.html#upgrade-guidelines.

⚠️ Breaking Change ⚠️

From https://crates.parity.io/frame_support/attr.pallet.html#checking-upgrade-guidelines

storages now use PalletInfo for module_prefix instead of the one given to decl_storage: Thus any use of this pallet in construct_runtime! should be careful to update name in order not to break storage or to upgrade storage (moreover for instantiable pallet). If pallet is published, make sure to warn about this breaking change.

So users of the Timestamp pallet must be careful about the name they used in construct_runtime!. Hence the runtime-migration label, which might not be needed depending on the configuration of the Timestamp pallet.


#[pallet::pallet]
#[pallet::generate_store(pub(super) trait Store)]
pub struct Pallet<T>(PhantomData<T>);
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The implicit syntax is now slightly recommended over the explicit one

Suggested change
pub struct Pallet<T>(PhantomData<T>);
pub struct Pallet<T>(_);

@thiolliere thiolliere added A0-please_review Pull request needs code review. B3-apinoteworthy C1-low PR touches the given topic and has a low impact on builders. labels Feb 10, 2021
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bot merge

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ghost commented Feb 10, 2021

Trying merge.

@ghost ghost merged commit ba290e0 into paritytech:master Feb 10, 2021
@shaunxw shaunxw deleted the sw/migrate-pallet-timestamp branch February 10, 2021 21:55
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4 participants