mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
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Squirrel
bc2e5e1fe2
First in a series of PRs that reduces our use of sp-std with a view to deprecating it. This is just looking at /substrate and moving some of the references from `sp-std` to `core`. These particular changes should be uncontroversial. Where macros are used `::core` should be used to remove any ambiguity. part of https://github.com/paritytech/polkadot-sdk/issues/2101
46 lines
1.6 KiB
Rust
46 lines
1.6 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) Parity Technologies (UK) Ltd.
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// SPDX-License-Identifier: Apache-2.0
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//! Migrations for the AURA pallet.
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use frame_support::{pallet_prelude::*, traits::Get, weights::Weight};
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struct __LastTimestamp<T>(core::marker::PhantomData<T>);
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impl<T: RemoveLastTimestamp> frame_support::traits::StorageInstance for __LastTimestamp<T> {
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fn pallet_prefix() -> &'static str {
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T::PalletPrefix::get()
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}
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const STORAGE_PREFIX: &'static str = "LastTimestamp";
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}
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type LastTimestamp<T> = StorageValue<__LastTimestamp<T>, (), ValueQuery>;
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pub trait RemoveLastTimestamp: super::Config {
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type PalletPrefix: Get<&'static str>;
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}
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/// Remove the `LastTimestamp` storage value.
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///
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/// This storage value was removed and replaced by `CurrentSlot`. As we only remove this storage
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/// value, it is safe to call this method multiple times.
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///
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/// This migration requires a type `T` that implements [`RemoveLastTimestamp`].
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pub fn remove_last_timestamp<T: RemoveLastTimestamp>() -> Weight {
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LastTimestamp::<T>::kill();
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T::DbWeight::get().writes(1)
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}
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