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Changes tries: support forks (#950)

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* forks support in changes trie storage

* moved convert_hash to primitives

* optimize ChangesTrieRootsStorage::root when anchor is canonicalized
This commit is contained in:
Svyatoslav Nikolsky
2018-11-13 14:17:14 +03:00
committed by Gav Wood
parent 037f9dde10
commit 6e3c56c135
25 changed files with 276 additions and 138 deletions
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substrate/core/state-machine/src/lib.rs
+5 -3
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@@ -53,7 +53,9 @@ pub use trie::{TrieMut, TrieDBMut, DBValue, MemoryDB};
pub use testing::TestExternalities;
pub use ext::Ext;
pub use backend::Backend;
pub use changes_trie::{Storage as ChangesTrieStorage,
pub use changes_trie::{
AnchorBlockId as ChangesTrieAnchorBlockId,
Storage as ChangesTrieStorage,
RootsStorage as ChangesTrieRootsStorage,
InMemoryStorage as InMemoryChangesTrieStorage,
key_changes, key_changes_proof, key_changes_proof_check,
@@ -154,8 +156,8 @@ pub trait Externalities<H: Hasher> {
/// Returns None if key provided is not a storage key. This can due to not being started with CHILD_STORAGE_KEY_PREFIX, or the trie implementation regards the key as invalid.
fn child_storage_root(&mut self, storage_key: &[u8]) -> Option<Vec<u8>>;
/// Get the change trie root of the current storage overlay at given block.
fn storage_changes_root(&mut self, block: u64) -> Option<H::Out> where H::Out: Ord;
/// Get the change trie root of the current storage overlay at a block wth given parent.
fn storage_changes_root(&mut self, parent: H::Out, parent_num: u64) -> Option<H::Out> where H::Out: Ord;
}
/// Code execution engine.