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The storage runtime interface should not enforce a hash type (#4231)

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* The storage runtime interface should not enforce a hash type

Currently the runtime interface enforces `H256` as hash type, but in the
future people could use whatever they want as hash type. The hash type
always needs to match between the runtime and the node, but that is
already required.

* Update primitives/externalities/src/lib.rs

Co-Authored-By: thiolliere <gui.thiolliere@gmail.com>
This commit is contained in:
Bastian Köcher
2019-11-28 01:00:29 +01:00
committed by Gavin Wood
parent 39388b826b
commit 3e26fceda4
29 changed files with 253 additions and 165 deletions
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substrate/primitives/externalities/src/lib.rs
+35 -9
View File
@@ -22,8 +22,6 @@
//!
//! This crate exposes the main [`Externalities`] trait.
use primitive_types::H256;
use std::any::{Any, TypeId};
use primitives_storage::ChildStorageKey;
@@ -42,26 +40,40 @@ pub trait Externalities: ExtensionStore {
fn storage(&self, key: &[u8]) -> Option<Vec<u8>>;
/// Get storage value hash. This may be optimized for large values.
fn storage_hash(&self, key: &[u8]) -> Option<H256>;
fn storage_hash(&self, key: &[u8]) -> Option<Vec<u8>>;
/// Get child storage value hash. This may be optimized for large values.
fn child_storage_hash(&self, storage_key: ChildStorageKey, key: &[u8]) -> Option<H256>;
///
/// Returns an `Option` that holds the SCALE encoded hash.
fn child_storage_hash(&self, storage_key: ChildStorageKey, key: &[u8]) -> Option<Vec<u8>>;
/// Read original runtime storage, ignoring any overlayed changes.
fn original_storage(&self, key: &[u8]) -> Option<Vec<u8>>;
/// Read original runtime child storage, ignoring any overlayed changes.
///
/// Returns an `Option` that holds the SCALE encoded hash.
fn original_child_storage(&self, storage_key: ChildStorageKey, key: &[u8]) -> Option<Vec<u8>>;
/// Get original storage value hash, ignoring any overlayed changes.
/// This may be optimized for large values.
fn original_storage_hash(&self, key: &[u8]) -> Option<H256>;
///
/// Returns an `Option` that holds the SCALE encoded hash.
fn original_storage_hash(&self, key: &[u8]) -> Option<Vec<u8>>;
/// Get original child storage value hash, ignoring any overlayed changes.
/// This may be optimized for large values.
fn original_child_storage_hash(&self, storage_key: ChildStorageKey, key: &[u8]) -> Option<H256>;
///
/// Returns an `Option` that holds the SCALE encoded hash.
fn original_child_storage_hash(
&self,
storage_key: ChildStorageKey,
key: &[u8],
) -> Option<Vec<u8>>;
/// Read child runtime storage.
///
/// Returns an `Option` that holds the SCALE encoded hash.
fn child_storage(&self, storage_key: ChildStorageKey, key: &[u8]) -> Option<Vec<u8>>;
/// Set storage entry `key` of current contract being called (effective immediately).
@@ -107,14 +119,23 @@ pub trait Externalities: ExtensionStore {
fn place_storage(&mut self, key: Vec<u8>, value: Option<Vec<u8>>);
/// Set or clear a child storage entry. Return whether the operation succeeds.
fn place_child_storage(&mut self, storage_key: ChildStorageKey, key: Vec<u8>, value: Option<Vec<u8>>);
fn place_child_storage(
&mut self,
storage_key: ChildStorageKey,
key: Vec<u8>,
value: Option<Vec<u8>>,
);
/// Get the identity of the chain.
fn chain_id(&self) -> u64;
/// Get the trie root of the current storage map. This will also update all child storage keys
/// in the top-level storage map.
fn storage_root(&mut self) -> H256;
///
/// The hash is defined by the `Block`.
///
/// Returns the SCALE encoded hash.
fn storage_root(&mut self) -> Vec<u8>;
/// Get the trie root of a child storage map. This will also update the value of the child
/// storage keys in the top-level storage map.
@@ -123,7 +144,12 @@ pub trait Externalities: ExtensionStore {
fn child_storage_root(&mut self, storage_key: ChildStorageKey) -> Vec<u8>;
/// Get the change trie root of the current storage overlay at a block with given parent.
fn storage_changes_root(&mut self, parent: H256) -> Result<Option<H256>, ()>;
/// `parent` is expects a SCALE endcoded hash.
///
/// The hash is defined by the `Block`.
///
/// Returns the SCALE encoded hash.
fn storage_changes_root(&mut self, parent: &[u8]) -> Result<Option<Vec<u8>>, ()>;
}
/// Extension for the [`Externalities`] trait.