* 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
* core: grandpa: move consensus_changes to its own submodule
* core: grandpa: move justification to its own submodule
* core: grandpa: move environment to its own submodule
* core: grandpa: move block import to its own submodule
* core: fix predicate for dropping grandpa round messages
* core: grandpa: drop commits topic on authority set change
* core: gossip: only drop known messages based on expiration time
* core: grandpa: don't broadcast commit messages
* core: gossip: don't assume topics are header hashes
* core: gossip: expire messages more agressively
* core: grandpa: fix test environment
* core: gossip: fix tests
* core: gossip: track dead topics (and ignore messages)
* core: gossip: test dead topic pruning
* core: keep known gossip messages for twice their expiration
* core: test expiration of known gossip messages
* core: only broadcast grandpa votes if authority in current set
* core: only broadcast grandpa commits if authority in current set
* core: fix bug on ondemand dispatch
after a request was dispatched to the last peer the dispatch would loop
forever on subsequent requests that aren't able to be fulfilled by any
of the peers, since the last peer wasn't updated.
* core: try to dispatch all pending ondemand requests
* node: remove grandpa authority flags
* node: exit-guard grandpa and aura spawned futures
* node: wait for futures to stop running on shutdown
* core: run connectivity tests on same ports
* core: pass on_exit future when starting aura and grandpa
* node: add issue number to todo
* core: fix aura and grandpa tests
* core: support broadcasting consensus message to all peers
* grandpa: remove liveness oracle
* node: always start grandpa on full nodes
* core: don't check for grandpa justifications on failed block imports
* core: fix network connectivity test
* core: make block justification optional
* runtime: update wasm binaries
* core: optionally pass justification on finalize_block
* finality-grandpa: add channel to trigger authority set changes
this will allow the `BlockImport` to trigger an authority set change when
importing a change block that provides a justification (when syncing)
* finality-grandpa: move finalize_block to free function
* finality-grandpa: add GrandpaOracle for auth set liveness checking
this will be used by `BlockImport` to check whether the authority set for a
given block is still live, if the authority set isn't live then importing a
change block requires a justification.
* finality-grandpa: store justification on finalized transition blocks
* finality-grandpa: check justification on authority set change blocks
* finality-grandpa: poll grandpa liveness oracle every 10 seconds
* finality-grandpa: spawn grandpa oracle in service setup
* core: support multiple subscriptions per consensus gossip topic
* finality-grandpa: create and verify justifications
* finality-grandpa: update to local branch of grandpa
* finality-grandpa: update to finality-grandpa v0.5.0
* finality-grandpa: move grandpa oracle code
* finality-grandpa: fix canonality check
* finality-grandpa: clean up error handling
* finality-grandpa: fix canonical_at_height
* finality-grandpa: fix tests
* runtime: update wasm binaries
* core: add tests for finalizing block with justification
* finality-grandpa: improve validation of justifications
* core: remove unused IncompleteJustification block import error
* core: test multiple subscribers for same consensus gossip topic
* Revert "finality-grandpa: improve validation of justifications"
This reverts commit 51eb2c58c2219801e876af6d6c9371bdd9ff2477.
* finality-grandpa: fix commit validation
* finality-grandpa: fix commit ancestry validation
* finality-grandpa: use grandpa v0.5.1
* finality-grandpa: add docs
* finality-grandpa: fix failing test
* finality-grandpa: only allow a pending authority set change per fork
* finality-grandpa: fix validator set transition test
* core, node: use grandpa block import for locally sealed aura blocks
* core: impl DerefMut for FullComponents
* node: take grandpa_import_setup from service config
* substrate: return Option in all storage related RPC methods
* substrate: remove unused imports
* substrate: remove unused NoValueForKey error variant
* substrate: don't return Option on code_at since code is always defined
André Silva