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generate_storage_alias: Rewrite as proc macro attribute (#11387)

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* generate_storage_alias: Rewrite as proc macro attribute

This rewrites the `generate_storage_alias!` declarative macro as proc-macro attribute. While doing
this the name is changed to `storage_alias`. The prefix can now also be the name of a pallet. This
makes storage aliases work in migrations for all kind of chains and not just for the ones that use
predefined prefixes.

* Fix compilation and FMT

* Moare fixes

* 🤦

* ......

* Rework the syntax and support instancing

* FMT

* Prefix variants with `Storage`

* Make it compile

* Fix where clause on rust stable
This commit is contained in:
Bastian Köcher
2022-05-18 00:45:56 +02:00
committed by GitHub
parent 27f08fec3a
commit 74428fa8ac
21 changed files with 884 additions and 379 deletions
Download Patch File Download Diff File Expand all files Collapse all files
substrate/frame/system/src/migrations/mod.rs
+22 -40
View File
@@ -17,6 +17,7 @@
//! Migrate the reference counting state.
use crate::{Config, Pallet};
use codec::{Decode, Encode, FullCodec};
use frame_support::{
pallet_prelude::ValueQuery, traits::PalletInfoAccess, weights::Weight, Blake2_128Concat,
@@ -52,43 +53,24 @@ pub trait V2ToV3 {
type AccountData: 'static + FullCodec;
}
// ### Warning
//
// The call below is only valid because the name System is enforced
// at runtime construction level for the system pallet.
frame_support::generate_storage_alias!(
System, UpgradedToU32RefCount => Value<
bool,
ValueQuery
>
);
#[frame_support::storage_alias]
type UpgradedToU32RefCount<T: Config> = StorageValue<Pallet<T>, bool, ValueQuery>;
// ### Warning
//
// The call below is only valid because the name System is enforced
// at runtime construction level for the system pallet.
frame_support::generate_storage_alias!(
System, UpgradedToTripleRefCount => Value<
bool,
ValueQuery
>
);
#[frame_support::storage_alias]
type UpgradedToTripleRefCount<T: Config> = StorageValue<Pallet<T>, bool, ValueQuery>;
// ### Warning
//
// The call below is only valid because the name System is enforced
// at runtime construction level for the system pallet.
frame_support::generate_storage_alias!(
System, Account<T: V2ToV3> => Map<
(Blake2_128Concat, T::AccountId),
AccountInfo<T::Index, T::AccountData>
>
);
#[frame_support::storage_alias]
type Account<V, T: Config> = StorageMap<
Pallet<T>,
Blake2_128Concat,
<V as V2ToV3>::AccountId,
AccountInfo<<V as V2ToV3>::Index, <V as V2ToV3>::AccountData>,
>;
/// Migrate from unique `u8` reference counting to triple `u32` reference counting.
pub fn migrate_from_single_u8_to_triple_ref_count<T: V2ToV3>() -> Weight {
pub fn migrate_from_single_u8_to_triple_ref_count<V: V2ToV3, T: Config>() -> Weight {
let mut translated: usize = 0;
<Account<T>>::translate::<(T::Index, u8, T::AccountData), _>(|_key, (nonce, rc, data)| {
<Account<V, T>>::translate::<(V::Index, u8, V::AccountData), _>(|_key, (nonce, rc, data)| {
translated += 1;
Some(AccountInfo { nonce, consumers: rc as RefCount, providers: 1, sufficients: 0, data })
});
@@ -97,15 +79,15 @@ pub fn migrate_from_single_u8_to_triple_ref_count<T: V2ToV3>() -> Weight {
"Applied migration from single u8 to triple reference counting to {:?} elements.",
translated
);
<UpgradedToU32RefCount>::put(true);
<UpgradedToTripleRefCount>::put(true);
<UpgradedToU32RefCount<T>>::put(true);
<UpgradedToTripleRefCount<T>>::put(true);
Weight::max_value()
}
/// Migrate from unique `u32` reference counting to triple `u32` reference counting.
pub fn migrate_from_single_to_triple_ref_count<T: V2ToV3>() -> Weight {
pub fn migrate_from_single_to_triple_ref_count<V: V2ToV3, T: Config>() -> Weight {
let mut translated: usize = 0;
<Account<T>>::translate::<(T::Index, RefCount, T::AccountData), _>(
<Account<V, T>>::translate::<(V::Index, RefCount, V::AccountData), _>(
|_key, (nonce, consumers, data)| {
translated += 1;
Some(AccountInfo { nonce, consumers, providers: 1, sufficients: 0, data })
@@ -116,14 +98,14 @@ pub fn migrate_from_single_to_triple_ref_count<T: V2ToV3>() -> Weight {
"Applied migration from single to triple reference counting to {:?} elements.",
translated
);
<UpgradedToTripleRefCount>::put(true);
<UpgradedToTripleRefCount<T>>::put(true);
Weight::max_value()
}
/// Migrate from dual `u32` reference counting to triple `u32` reference counting.
pub fn migrate_from_dual_to_triple_ref_count<T: V2ToV3>() -> Weight {
pub fn migrate_from_dual_to_triple_ref_count<V: V2ToV3, T: Config>() -> Weight {
let mut translated: usize = 0;
<Account<T>>::translate::<(T::Index, RefCount, RefCount, T::AccountData), _>(
<Account<V, T>>::translate::<(V::Index, RefCount, RefCount, V::AccountData), _>(
|_key, (nonce, consumers, providers, data)| {
translated += 1;
Some(AccountInfo { nonce, consumers, providers, sufficients: 0, data })
@@ -134,6 +116,6 @@ pub fn migrate_from_dual_to_triple_ref_count<T: V2ToV3>() -> Weight {
"Applied migration from dual to triple reference counting to {:?} elements.",
translated
);
<UpgradedToTripleRefCount>::put(true);
<UpgradedToTripleRefCount<T>>::put(true);
Weight::max_value()
}