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migration.rs
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migration.rs
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// This file is part of Substrate.
// Copyright (C) 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 super::*;
use frame_support::traits::OnRuntimeUpgrade;
use log;
#[cfg(feature = "try-runtime")]
use sp_runtime::TryRuntimeError;
pub mod next_asset_id {
use super::*;
use sp_core::Get;
/// Set [`NextAssetId`] to the value of `ID` if [`NextAssetId`] does not exist yet.
pub struct SetNextAssetId<ID, T: Config<I>, I: 'static = ()>(
core::marker::PhantomData<(ID, T, I)>,
);
impl<ID, T: Config<I>, I: 'static> OnRuntimeUpgrade for SetNextAssetId<ID, T, I>
where
T::AssetId: Incrementable,
ID: Get<T::AssetId>,
{
fn on_runtime_upgrade() -> frame_support::weights::Weight {
if !NextAssetId::<T, I>::exists() {
NextAssetId::<T, I>::put(ID::get());
T::DbWeight::get().reads_writes(1, 1)
} else {
T::DbWeight::get().reads(1)
}
}
}
}
pub mod v1 {
use frame_support::{pallet_prelude::*, weights::Weight};
use super::*;
#[derive(Decode)]
pub struct OldAssetDetails<Balance, AccountId, DepositBalance> {
pub owner: AccountId,
pub issuer: AccountId,
pub admin: AccountId,
pub freezer: AccountId,
pub supply: Balance,
pub deposit: DepositBalance,
pub min_balance: Balance,
pub is_sufficient: bool,
pub accounts: u32,
pub sufficients: u32,
pub approvals: u32,
pub is_frozen: bool,
}
impl<Balance, AccountId, DepositBalance> OldAssetDetails<Balance, AccountId, DepositBalance> {
fn migrate_to_v1(self) -> AssetDetails<Balance, AccountId, DepositBalance> {
let status = if self.is_frozen { AssetStatus::Frozen } else { AssetStatus::Live };
AssetDetails {
owner: self.owner,
issuer: self.issuer,
admin: self.admin,
freezer: self.freezer,
supply: self.supply,
deposit: self.deposit,
min_balance: self.min_balance,
is_sufficient: self.is_sufficient,
accounts: self.accounts,
sufficients: self.sufficients,
approvals: self.approvals,
status,
}
}
}
pub struct MigrateToV1<T>(core::marker::PhantomData<T>);
impl<T: Config> OnRuntimeUpgrade for MigrateToV1<T> {
fn on_runtime_upgrade() -> Weight {
let in_code_version = Pallet::<T>::in_code_storage_version();
let on_chain_version = Pallet::<T>::on_chain_storage_version();
if on_chain_version == 0 && in_code_version == 1 {
let mut translated = 0u64;
Asset::<T>::translate::<
OldAssetDetails<T::Balance, T::AccountId, DepositBalanceOf<T>>,
_,
>(|_key, old_value| {
translated.saturating_inc();
Some(old_value.migrate_to_v1())
});
in_code_version.put::<Pallet<T>>();
log::info!(
target: LOG_TARGET,
"Upgraded {} pools, storage to version {:?}",
translated,
in_code_version
);
T::DbWeight::get().reads_writes(translated + 1, translated + 1)
} else {
log::info!(
target: LOG_TARGET,
"Migration did not execute. This probably should be removed"
);
T::DbWeight::get().reads(1)
}
}
#[cfg(feature = "try-runtime")]
fn pre_upgrade() -> Result<Vec<u8>, TryRuntimeError> {
frame_support::ensure!(
Pallet::<T>::on_chain_storage_version() == 0,
"must upgrade linearly"
);
let prev_count = Asset::<T>::iter().count();
Ok((prev_count as u32).encode())
}
#[cfg(feature = "try-runtime")]
fn post_upgrade(prev_count: Vec<u8>) -> Result<(), TryRuntimeError> {
let prev_count: u32 = Decode::decode(&mut prev_count.as_slice()).expect(
"the state parameter should be something that was generated by pre_upgrade",
);
let post_count = Asset::<T>::iter().count() as u32;
ensure!(
prev_count == post_count,
"the asset count before and after the migration should be the same"
);
let in_code_version = Pallet::<T>::in_code_storage_version();
let on_chain_version = Pallet::<T>::on_chain_storage_version();
frame_support::ensure!(in_code_version == 1, "must_upgrade");
ensure!(
in_code_version == on_chain_version,
"after migration, the in_code_version and on_chain_version should be the same"
);
Asset::<T>::iter().try_for_each(|(_id, asset)| -> Result<(), TryRuntimeError> {
ensure!(
asset.status == AssetStatus::Live || asset.status == AssetStatus::Frozen,
"assets should only be live or frozen. None should be in destroying status, or undefined state"
);
Ok(())
})?;
Ok(())
}
}
}