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Introduce notion of finality to substrate (#760)

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* finalization for in_mem

* fetch last finalized block

* pruning: use canonical term instead of final

* finalize blocks in full node

* begin to port light client DB

* add tree-route

* keep number index consistent in full nodes

* fix tests

* disable cache and finish porting light client

* add AsMut to system module

* final leaf is always best

* fix all tests

* Fix comment and trace

* removed unused Into call

* add comment on behavior of `finalize_block`
This commit is contained in:
Robert Habermeier
2018-09-21 15:56:21 +02:00
committed by Gav Wood
parent 28cc4d0fd6
commit b7d095a2e0
19 changed files with 976 additions and 370 deletions
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substrate/core/client/src/light/backend.rs
+14 -6
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@@ -26,7 +26,7 @@ use runtime_primitives::{bft::Justification, generic::BlockId};
use runtime_primitives::traits::{Block as BlockT, NumberFor};
use state_machine::{Backend as StateBackend, InMemoryChangesTrieStorage, TrieBackend};
use backend::{Backend as ClientBackend, BlockImportOperation, RemoteBackend};
use backend::{Backend as ClientBackend, BlockImportOperation, RemoteBackend, NewBlockState};
use blockchain::HeaderBackend as BlockchainHeaderBackend;
use error::{Error as ClientError, ErrorKind as ClientErrorKind, Result as ClientResult};
use light::blockchain::{Blockchain, Storage as BlockchainStorage};
@@ -43,9 +43,9 @@ pub struct Backend<S, F> {
/// Light block (header and justification) import operation.
pub struct ImportOperation<Block: BlockT, S, F> {
is_new_best: bool,
header: Option<Block::Header>,
authorities: Option<Vec<AuthorityId>>,
leaf_state: NewBlockState,
_phantom: ::std::marker::PhantomData<(S, F)>,
}
@@ -84,16 +84,24 @@ impl<S, F, Block, H, C> ClientBackend<Block, H, C> for Backend<S, F> where
fn begin_operation(&self, _block: BlockId<Block>) -> ClientResult<Self::BlockImportOperation> {
Ok(ImportOperation {
is_new_best: false,
header: None,
authorities: None,
leaf_state: NewBlockState::Normal,
_phantom: Default::default(),
})
}
fn commit_operation(&self, operation: Self::BlockImportOperation) -> ClientResult<()> {
let header = operation.header.expect("commit is called after set_block_data; set_block_data sets header; qed");
self.blockchain.storage().import_header(operation.is_new_best, header, operation.authorities)
self.blockchain.storage().import_header(
header,
operation.authorities,
operation.leaf_state,
)
}
fn finalize_block(&self, block: BlockId<Block>) -> ClientResult<()> {
self.blockchain.storage().finalize_header(block)
}
fn blockchain(&self) -> &Blockchain<S, F> {
@@ -153,9 +161,9 @@ where
header: Block::Header,
_body: Option<Vec<Block::Extrinsic>>,
_justification: Option<Justification<Block::Hash>>,
is_new_best: bool
state: NewBlockState,
) -> ClientResult<()> {
self.is_new_best = is_new_best;
self.leaf_state = state;
self.header = Some(header);
Ok(())
}