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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/blockchain.rs
+2
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@@ -48,6 +48,8 @@ pub trait Backend<Block: BlockT>: HeaderBackend<Block> {
fn body(&self, id: BlockId<Block>) -> Result<Option<Vec<<Block as BlockT>::Extrinsic>>>;
/// Get block justification. Returns `None` if justification does not exist.
fn justification(&self, id: BlockId<Block>) -> Result<Option<Justification<Block::Hash>>>;
/// Get last finalized block hash.
fn last_finalized(&self) -> Result<Block::Hash>;
/// Returns data cache reference, if it is enabled on this backend.
fn cache(&self) -> Option<&Cache<Block>>;