* substrate-relay: initial commit

* MillauHeaderApi and RialtoHeaderApi

* post-merge fixes + TODOs + compilation

* Fix clippy errors.

* Cargo fmt.

* Enable clippy checks.

* Create if does not exist.

* Fix warnings and enable sccache for clippy.

* chmod +x

* Revert and ignore errors.

* Update cancel-workflow-action.

* Fixes.

* Clippy fixes.

* Fix compilation.

* Fix new clippy warnings.

* fmt --all

* Fix the rest.

* fmt --all

* Conditional.

* Bump smallvec.

* Use separate cache dir for clippy to prevent races.

* Remove unused imports in tests

* Remove "useless conversion"

* Move clippy to main worfklow to avoid clashes.

* Fix clippy error.

* Fix remaning clippy errors.

* cargo fmt --all

Co-authored-by: Hernando Castano <[email protected]>

* Substrate 606c56d2e2f69f68f3947551224be6a3515dff60

* update jsonrpsee

* mute warnings from sub2sub module+relay

* cargo fmt --all

* Run RustFmt as part of the CI

* Format repo

* Run RustFmt before the default Travis build step

Apparently if you override `script` you also need to make
sure to `build` and `test` the code yourself.

* Format repo

* Bump jsonrpsee from `de7cbf2` to `a0bea41`

Bumps [jsonrpsee](https://github.com/paritytech/jsonrpsee) from `de7cbf2` to `a0bea41`.
- [Release notes](https://github.com/paritytech/jsonrpsee/releases)
- [Commits](https://github.com/paritytech/jsonrpsee/compare/de7cbf2b7528802b6c1079de837db1d4f24561a6...a0bea41c4f37125fa742ec48b12e11cf55c592b5)

Signed-off-by: dependabot-preview[bot] <[email protected]>

* Fix imports.

* Update client code.

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: Tomasz Drwięga <[email protected]>

* Add the scripts.

* Add license preamble.

* Change existing license headers.

* Initial commit. CLI which parses RPC urls.

* Establish ws connections and make simple RPC requests.

* Complete bridge setup.

* Process subscription events.

* Ctrl-C handler.

* Write a bare-bones README and copy in design doc.

* Modularize code a little bit.

* Communicate with each chain in a separate task.

* Parse headers from RPC subscription notifications.

* Send (fake) extrinsics across bridge channels.

And now it's deadlocked.

* Fix deadlock.

* Clarify in README that this is not-in-progress.

* Move everything into a single folder

* Move Substrate relay into appropriate folder

* Get the Substrate Relay node compiling

* Update Cargo.lock

* Use new composite accounts from Substrate

* Remove specification document

It has been moved to the Wiki on the Github repo.

* Update author + remove comments

* Use latest master for jsonrpsee

Required renaming some stuff (e.g Client -> RawClient)

Co-authored-by: Jim Posen <[email protected]>