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feat: compute pallet/storage prefix hash at compile time (#1539)

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Since the hash rules of this part of the `pallet_prefix/storage_prefix`
are always fixed, we can put the runtime calculation into compile time.

---
polkadot address: 15ouFh2SHpGbHtDPsJ6cXQfes9Cx1gEFnJJsJVqPGzBSTudr

---------

Co-authored-by: Juan <juangirini@gmail.com>
Co-authored-by: command-bot <>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
This commit is contained in:
yjh
2023-10-03 23:16:46 +08:00
committed by GitHub
parent 3ea497b5a0
commit aad80cce31
28 changed files with 263 additions and 123 deletions
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substrate/frame/support/src/storage/mod.rs
+20 -12
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@@ -191,7 +191,7 @@ pub trait StorageList<V: FullCodec> {
/// Append a single element.
///
/// Should not be called repeatedly; use `append_many` instead.
/// Should not be called repeatedly; use `append_many` instead.
/// Worst case linear `O(len)` with `len` being the number if elements in the list.
fn append_one<EncodeLikeValue>(item: EncodeLikeValue)
where
@@ -202,7 +202,7 @@ pub trait StorageList<V: FullCodec> {
/// Append many elements.
///
/// Should not be called repeatedly; use `appender` instead.
/// Should not be called repeatedly; use `appender` instead.
/// Worst case linear `O(len + items.count())` with `len` beings the number if elements in the
/// list.
fn append_many<EncodeLikeValue, I>(items: I)
@@ -1273,15 +1273,15 @@ impl<T> Iterator for ChildTriePrefixIterator<T> {
/// Trait for storage types that store all its value after a unique prefix.
pub trait StoragePrefixedContainer {
/// Module prefix. Used for generating final key.
fn module_prefix() -> &'static [u8];
/// Pallet prefix. Used for generating final key.
fn pallet_prefix() -> &'static [u8];
/// Storage prefix. Used for generating final key.
fn storage_prefix() -> &'static [u8];
/// Final full prefix that prefixes all keys.
fn final_prefix() -> [u8; 32] {
crate::storage::storage_prefix(Self::module_prefix(), Self::storage_prefix())
crate::storage::storage_prefix(Self::pallet_prefix(), Self::storage_prefix())
}
}
@@ -1289,18 +1289,18 @@ pub trait StoragePrefixedContainer {
///
/// By default the final prefix is:
/// ```nocompile
/// Twox128(module_prefix) ++ Twox128(storage_prefix)
/// Twox128(pallet_prefix) ++ Twox128(storage_prefix)
/// ```
pub trait StoragePrefixedMap<Value: FullCodec> {
/// Module prefix. Used for generating final key.
fn module_prefix() -> &'static [u8]; // TODO move to StoragePrefixedContainer
/// Pallet prefix. Used for generating final key.
fn pallet_prefix() -> &'static [u8]; // TODO move to StoragePrefixedContainer
/// Storage prefix. Used for generating final key.
fn storage_prefix() -> &'static [u8];
/// Final full prefix that prefixes all keys.
fn final_prefix() -> [u8; 32] {
crate::storage::storage_prefix(Self::module_prefix(), Self::storage_prefix())
crate::storage::storage_prefix(Self::pallet_prefix(), Self::storage_prefix())
}
/// Remove all values in the overlay and up to `limit` in the backend.
@@ -1624,7 +1624,7 @@ mod test {
TestExternalities::default().execute_with(|| {
struct MyStorage;
impl StoragePrefixedMap<u64> for MyStorage {
fn module_prefix() -> &'static [u8] {
fn pallet_prefix() -> &'static [u8] {
b"MyModule"
}
@@ -1701,7 +1701,7 @@ mod test {
impl generator::StorageValue<Digest> for Storage {
type Query = Digest;
fn module_prefix() -> &'static [u8] {
fn pallet_prefix() -> &'static [u8] {
b"MyModule"
}
@@ -1716,6 +1716,10 @@ mod test {
fn from_query_to_optional_value(v: Self::Query) -> Option<Digest> {
Some(v)
}
fn storage_value_final_key() -> [u8; 32] {
storage_prefix(Self::pallet_prefix(), Self::storage_prefix())
}
}
Storage::append(DigestItem::Other(Vec::new()));
@@ -1736,7 +1740,7 @@ mod test {
type Query = u64;
type Hasher = Twox64Concat;
fn module_prefix() -> &'static [u8] {
fn pallet_prefix() -> &'static [u8] {
b"MyModule"
}
@@ -1744,6 +1748,10 @@ mod test {
b"MyStorageMap"
}
fn prefix_hash() -> [u8; 32] {
storage_prefix(Self::pallet_prefix(), Self::storage_prefix())
}
fn from_optional_value_to_query(v: Option<u64>) -> Self::Query {
v.unwrap_or_default()
}