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Light friendly storage tracking: changes trie + extending over ranges (#628)

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* changes_trie

* changs_trie: continue

* changes_trie: adding tests

* fixed TODO

* removed obsolete ExtrinsicChanges

* encodable ChangesTrieConfiguration

* removed polkadot fle

* fixed grumbles

* ext_storage_changes_root returns u32

* moved changes trie root to digest

* removed commented code

* read storage values from native code

* fixed grumbles

* fixed grumbles

* missing comma
This commit is contained in:
Svyatoslav Nikolsky
2018-09-18 10:14:41 +03:00
committed by Gav Wood
parent 24479cd7f5
commit 7fa337afbc
64 changed files with 3130 additions and 788 deletions
Download Patch File Download Diff File Expand all files Collapse all files
substrate/core/client/src/light/backend.rs
+17 -14
View File
@@ -24,11 +24,7 @@ use parking_lot::RwLock;
use primitives::AuthorityId;
use runtime_primitives::{bft::Justification, generic::BlockId};
use runtime_primitives::traits::{Block as BlockT, NumberFor};
use state_machine::{
Backend as StateBackend,
TrieBackend as StateTrieBackend,
TryIntoTrieBackend as TryIntoStateTrieBackend
};
use state_machine::{Backend as StateBackend, InMemoryChangesTrieStorage, TrieBackend};
use backend::{Backend as ClientBackend, BlockImportOperation, RemoteBackend};
use blockchain::HeaderBackend as BlockchainHeaderBackend;
@@ -37,6 +33,8 @@ use light::blockchain::{Blockchain, Storage as BlockchainStorage};
use light::fetcher::{Fetcher, RemoteReadRequest};
use patricia_trie::NodeCodec;
use hashdb::Hasher;
use memorydb::MemoryDB;
use heapsize::HeapSizeOf;
/// Light client backend.
pub struct Backend<S, F> {
@@ -77,10 +75,12 @@ impl<S, F, Block, H, C> ClientBackend<Block, H, C> for Backend<S, F> where
F: Fetcher<Block>,
H: Hasher,
C: NodeCodec<H>,
H::Out: HeapSizeOf,
{
type BlockImportOperation = ImportOperation<Block, S, F>;
type Blockchain = Blockchain<S, F>;
type State = OnDemandState<Block, S, F>;
type ChangesTrieStorage = InMemoryChangesTrieStorage<H>;
fn begin_operation(&self, _block: BlockId<Block>) -> ClientResult<Self::BlockImportOperation> {
Ok(ImportOperation {
@@ -100,6 +100,10 @@ impl<S, F, Block, H, C> ClientBackend<Block, H, C> for Backend<S, F> where
&self.blockchain
}
fn changes_trie_storage(&self) -> Option<&Self::ChangesTrieStorage> {
None
}
fn state_at(&self, block: BlockId<Block>) -> ClientResult<Self::State> {
let block_hash = match block {
BlockId::Hash(h) => Some(h),
@@ -125,6 +129,7 @@ where
S: BlockchainStorage<Block>,
F: Fetcher<Block>,
H: Hasher,
H::Out: HeapSizeOf,
C: NodeCodec<H>,
{}
@@ -164,6 +169,11 @@ where
Ok(())
}
fn update_changes_trie(&mut self, _update: MemoryDB<H>) -> ClientResult<()> {
// we're not storing anything locally => ignore changes
Ok(())
}
fn reset_storage<I: Iterator<Item=(Vec<u8>, Vec<u8>)>>(&mut self, _iter: I) -> ClientResult<()> {
// we're not storing anything locally => ignore changes
Ok(())
@@ -180,6 +190,7 @@ impl<Block, S, F, H, C> StateBackend<H, C> for OnDemandState<Block, S, F>
{
type Error = ClientError;
type Transaction = ();
type TrieBackendStorage = MemoryDB<H>;
fn storage(&self, key: &[u8]) -> ClientResult<Option<Vec<u8>>> {
let mut header = self.cached_header.read().clone();
@@ -214,16 +225,8 @@ impl<Block, S, F, H, C> StateBackend<H, C> for OnDemandState<Block, S, F>
// whole state is not available on light node
Vec::new()
}
}
impl<Block, S, F, H, C> TryIntoStateTrieBackend<H, C> for OnDemandState<Block, S, F>
where
Block: BlockT,
F: Fetcher<Block>,
H: Hasher,
C: NodeCodec<H>,
{
fn try_into_trie_backend(self) -> Option<StateTrieBackend<H, C>> {
fn try_into_trie_backend(self) -> Option<TrieBackend<Self::TrieBackendStorage, H, C>> {
None
}
}