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Import multiple authority set change blocks (#1808)

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* core: implement logic for tracking dag of possible pending changes

* core: move pending justifications dag to its own crate

* core: remove unnecessary clone bounds on dag

* core: request justifications in-order from the dag

* core: dag: rename changes variables to node

* core: dag: allow finalizing blocks not part of dag

* core: dag: track best finalized number

* core: dag: add more tests

* core: sync: clean up pending justifications dag

* core: dag: derive codec decode encode

* core: dag: better error support

* core: dag: add finalization guarded by predicate

* core: grandpa: track multiple authority set changes in dag

* core: dag: add pre-order iterator

* core: grandpa: request justifications on startup

* core: dag: rearrange order of definitions

* core: rename util/dag to util/fork_tree

* core: fork_tree: add docs

* core: fork_tree: add more tests

* core: fork_tree: fix issues found in tests

* core: grandpa: fix authorities tests

* core: grandpa: add docs for is_descendent_of

* core: sync: add docs for PendingJustifications

* core: sync: add test for justification requests across forks

* core: sync: don't resend import or finality notifications in tests

* core: grandpa: add test for importing multiple change blocks

* core: grandpa: fix logic for checking if a block enacts a change

* core: grandpa: fix authorities tests
This commit is contained in:
André Silva
2019-02-19 23:08:43 +00:00
committed by Gav Wood
parent c5d3da32f2
commit 21779b8cf2
16 changed files with 1322 additions and 273 deletions
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substrate/core/finality-grandpa/src/lib.rs
+8 -6
View File
@@ -45,12 +45,12 @@
//! logic is complex to compute because it requires looking arbitrarily far
//! back in the chain.
//!
//! Instead, we keep track of a list of all signals we've seen so far,
//! sorted ascending by the block number they would be applied at. We never vote
//! on chains with number higher than the earliest handoff block number
//! (this is num(signal) + N). When finalizing a block, we either apply or prune
//! any signaled changes based on whether the signaling block is included in the
//! newly-finalized chain.
//! Instead, we keep track of a list of all signals we've seen so far (across
//! all forks), sorted ascending by the block number they would be applied at.
//! We never vote on chains with number higher than the earliest handoff block
//! number (this is num(signal) + N). When finalizing a block, we either apply
//! or prune any signaled changes based on whether the signaling block is
//! included in the newly-finalized chain.
use futures::prelude::*;
use log::{debug, info, warn};
@@ -169,6 +169,8 @@ pub enum Error {
Blockchain(String),
/// Could not complete a round on disk.
Client(ClientError),
/// An invariant has been violated (e.g. not finalizing pending change blocks in-order)
Safety(String),
/// A timer failed to fire.
Timer(::tokio::timer::Error),
}