* Use a background task instead of a thread for the import queue

* Update Cargo.locks

* Comment

* Pass input data via the scratch buffer.

Remove calls to ext_input_*.

* Fix tests and docs

* Bump the version.

* Remove ext_input_* from COMPLEXITY.md

* Return back the length check and add more comments

* Update the documentation of the scratch buffer.

* Fix a silly mistake.

* do not return empty entries from state_queryStorage

* revert back None -> null change

* Revert "revert back None -> null change"

This reverts commit 318eb043.

* srml-contract → srml-contracts

* Trim.

* Bump version

* Remove `UserError` and switch to `error::Error`

* More cleanup

* Update core/executor/src/error.rs

Co-Authored-By: Sergei Pepyakin <[email protected]>

* Fix typo

* Update core/executor/src/allocator.rs

Co-Authored-By: Stanislav Tkach <[email protected]>

* ImportQueue methods are now mut

* Link methods are now mut

* Remove Arc from BasicSyncQueue

* Fix tests

* Remove BasicSyncQueue

* Change the import queue API

* Add buffered_link

* Remove obsolete tests

* Comments and style improvement pass

* Fix grandpa and comment cleanup

* Update core/consensus/common/src/import_queue.rs

Co-Authored-By: André Silva <[email protected]>

* Added some documentation and question on the main sync code

* Remove strange formatting change

Co-Authored-By: André Silva <[email protected]>

* Improve comment per suggestion

* Remove comment about re-using PeerInfo, no real reason and no real consensus if it's better or worse.

* Fix redundancy in comment

Co-Authored-By: André Silva <[email protected]>

* Explaining more things and fixing review comments.

* Better explanation of MAJOR_SYNC_BLOCKS
* Explains the ancestor search strategy a bit
* Corrects explanation of what a stale block is
* Adds a bit of context for `request_ancestry` function

* Revert code change to not confuse the PR

* ci: publish rustdocs to github repo substrate-developer-hub/rustdocs

Toralf Wittner authored Jun 18, 2019 and Arkadiy Paronyan committed Jun 18, 2019

* Change network::sync::extra_requests to not send.

Instead it only maintains the invariants and leaves the actual I/O part
to the parent module (i.e. `sync`).

* Update Cargo.lock.