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pezkuwi-subxt/substrate/frame/contracts/src/migration.rs
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Bastian Köcher 4fe55f0bcb Move PalletVersion away from the crate version (#9165)
* Move `PalletVersion` away from the crate version

Before this pr, `PalletVersion` was referring to the crate version that
hosted the pallet. This pr introduces a custom `package.metadata.frame`
section in the `Cargo.toml` that can contain a `pallet-version` key
value pair. While the value is expected to be a valid u16. If this
key/value pair isn't given, the version is set to 1.

It also changes the `PalletVersion` declaration. We now only have one
`u16` that represents the version. Not a major/minor/patch version. As
the old `PalletVersion` was starting with the `u16` major, decoding the
old values will work.

* Overhaul the entire implementation

- Drop PalletVersion
- Introduce StorageVersion
- StorageVersion needs to be set in the crate and set for the macros
- Added migration

* Fix migrations

* Review feedback

* Remove unneeded dep

* remove pub consts

* Brings back logging and implements `GetStorageVersion`

* Return weight from migration

* Fmt and remove unused import

* Update frame/support/src/dispatch.rs

Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>

* Update frame/support/src/traits/metadata.rs

Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>

Co-authored-by: Guillaume Thiolliere <gui.thiolliere@gmail.com>
2021-07-27 21:21:27 +00:00

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1.1 KiB
Rust

// This file is part of Substrate.
// Copyright (C) 2018-2021 Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use crate::{Config, Pallet, Weight};
use frame_support::{
storage::migration,
traits::{Get, PalletInfoAccess, StorageVersion},
};
pub fn migrate<T: Config>() -> Weight {
let mut weight: Weight = 0;
if StorageVersion::get::<Pallet<T>>() == 3 {
weight = weight.saturating_add(T::DbWeight::get().writes(1));
migration::remove_storage_prefix(<Pallet<T>>::name().as_bytes(), b"CurrentSchedule", b"");
StorageVersion::new(4).put::<Pallet<T>>();
}
weight
}