Merge branch 'hc-multiple-bridge-pallet-instances' of github.com:paritytech/parity-bridges-common into hc-multiple-bridge-pallet-instances

Allows the project to compile. However, it should be noted that in reality
we shouldn't be hardcoding the pallet we're calling.

Through some discussions it has been decided that the `bridge-node` should, like
Substrate's `node-template`, be a showcase of the different pallets available in
a project. Because of this I've removed the feature flags for the Rialto and Kovan
networks in favour of having both of them included in the runtime.

I specify that it's only _an instance_ instead of _instances_ since the currency-exchange
pallet does not support multiple instances itself. What this commit does is make it so
that the different instances of the PoA chains we currently have are compatible with the
currency-exchange pallet through the implementation of the PeerBlockchain trait.

* Add Prometheus and Grafana to Docker Compose

* Expose relay's Prometheus metrics port

* Use Docker network references intead of localhost

When you have containers on the same network they don't communicate
over localhost, they instead refer to their container names

* Move dashboard components into deployment folder

* Update folder structure for Grafana and Prometheus config files

The new folder structure more closely matches the expected defaults
by Grafana and Prometheus, which allows us to clean up the paths
in our docker-compose file a bit.

* Add documentation about Prometheus and Grafana

* Refer to Prometheus server instead of node

* 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]>

* expose metrics for Prometheus

* added preconfigured configs for Prometheus and Grafana

* metrics-related cli args

* fix compilation

* Dockerfile for OpenEth.

* Add relayer dockerfile.

* Add docker-compose.

* Working on the relay.

* Bump a bunch of deps.

* Change relay branch.

* Running a 3-validators poa network.

* Add bridge nodes.

* Conditional compilation of bridge configs.

* Fix genesis hash.

* Disable features build.

* Disable empty steps.

* Work on sub2eth

* Add some logs.

* More logs.

* Fix compilation.

* Add chain-id parameter to relay.

* Unify bridge-hash.

* Update the hash.

* Ditch sub2eth for now.

* Add some docs & proxy configuration.

* Fixes.

* Fix remaining issues.

* Increase health timeout.

* Make sure to install curl for health monitoring.

* Fix kovan.

* Fix build.

* Create if does not exist.

* Fix benches.

* Revert CLI params requirements.

* cargo fmt --all

* Apply suggestions from code review

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

* Add some docs.

* Update BRIDGE_HASH to master

* Duplicate compose file.

* Rename testpoa to Rialto.

* Fix borked merge.

* Fix entrypoints to take arguments.

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

* [WIP] Fix cleanup cache 3

* check sccache idle

* check cache

* remove sccache stats

* Revert "[WIP] Fix cleanup cache (#190)"

This reverts commit f2d29ced.

* move Cleanup stage to merged.yml

* Fix cleanup cache

* echo github.env

* Cleanup always

* exchange benchmarks: framework

* updated comment about tx size

Co-authored-by: Tomasz Drwięga <[email protected]>

* fixed best_ethereum_block() params encoding

* updated versions

* relay exchange transaction(s)

* fixed Ethereum::get_block_by_hash

* added exchange trace

* fixed method name

* update for new web3

* svyatonik/rust-web3 -> tomusdrw/rust-web3

* if let Some() -> .expect()

* extracted loops in separate functions

* use yaml references (TIL)

* get eth header with transactions

* cargo fmt --all

* Update primitives/ethereum-poa/src/lib.rs

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

* Update relays/ethereum/src/ethereum_exchange.rs

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

* Update relays/ethereum/src/rpc_errors.rs

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

* Update relays/ethereum/src/exchange.rs

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

* removed comment

* Update relays/ethereum/src/ethereum_exchange.rs

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

* Update relays/ethereum/src/ethereum_exchange.rs

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

* module-level comments

* updated readme

* use web3 from crates.io

* added missing fields info in error description

* cargo fmt --all

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

* basic sync loop tests

* cargo ftm --all

* SyncLoopTestParams

* move sync loop tests to sync_loop_tests.rs

* cargo fmt --all

* If the cache is missing, copy it from the master

* make target dir

* cp -> rsync

* install rsync

* disable verbose out from rsync

* rsync --info=progress2

* rsync quiet

* add cleanup stage

* cleanup

* todo for rsync

* Run fmt on stable.

* remove toolchain

in the case of stable there is no need to explicitly specify the toolchain

* Run fmt on gh-actions runners.

* run on github runner

Co-authored-by: Denis S. Soldatov aka General-Beck <[email protected]>