* introduce FinalityEngine in relay code

* add FinalityEngine to relay

* spelling

* fix test compilation

* Update relays/lib-substrate-relay/src/finality/source.rs

Co-authored-by: Adrian Catangiu <[email protected]>

Co-authored-by: Adrian Catangiu <[email protected]>

* fix typos

* clippy fixes

* merge all similar update_conversion_rate functions

* stall timeout in conversion rate update loop

* fmt

* fix

* override conversion rate when message is sent

* spelling + fmt

* add --conversion-rate-override cli option

* try to read conversion rate from cmd output

* fix output

* fmt

* reinitialize bridge subcommand

* PolkadotToKusama in reinit-bridge

* using_same_fork metric in finality relay

* support `using_different_forks` in messages relay

* added dashboards and alerts

* lockfile

* encode and estimate Rococo/Wococo/Kusama/Polkadot messages

* allow send-message for non-bundled chains

* weight -> dispatch-weight

* fmt

* fix spelling

* more logging in on-demand headerss

* remove `maximal_headers_difference` concept from on-demand-relay

* another leftover from previous on-demand version

* removed extra log

* fmt

* use raw balance value if tokenDecimals property is missing

* fmt

Substrate: 31d90c202d6df9ce3837ee55587b604619a912ba
Polkadot: 60df3c55c711c2872872d6220f98b2611340e051
Cumulus: a9630551c2cd877952ab769c862af4c81b0ccd3c

* relay balance metrics

* convert balance to "main" tokens in balance metrics

* add balances widgets to maintenance dashboard

when messages pallet is halted, relay shall not submit messages delivery/confirmation transactions (#1289)

* move brnchmarks from Rialto to Millau

* fix limits test

* remove inbound_latest_received_nonce

* Update relays/lib-substrate-relay/src/messages_target.rs

Co-authored-by: Adrian Catangiu <[email protected]>

* verify that GRANDPA pallet is not initialized before submitting initialization transaction

* spelling

* The `spec_version` and `transaction_version` query from chain

* fix compile

* Lint

* Custom spec_version and transaction_version

* runtime version params struct opt

* runtime version cli

* cli params

* Add missing types defined

* fix compile

* debug cli

* clippy

* clippy

* Query spec_version and transaction_version same times

* Fix vars

* Wrap option

* Wrap option

* Try fix ci

* Change follow suggestions

* refactor message relay helpers

* single standalone_metrics function

* fixed tests

* clippy + fmt

* removed commented code

* add calls tracing

* fix spelling

* cargo fmt

* -commented code

* fix build again

* post-merge build fix

* clippy + fmt

* added lost stall timeout fix

* use best_block.parent() to start mortal tx era

* fmt

* Revert "revert messages transactions mortality"

This reverts commit 77776357.

* refactor finality relay helper definitions

* add missing doc

* removed commented code

* fmt

* disable rustfmt for macro

* move best_finalized method const to relay chain def

* unify metric names

* refactor standalone metrics

* headers sync metrics

* post-merge fix

* fix compilation

* fmt

* fix dashboards

* fix local dashboards

* update Rococo/Wococo runtime version

* remove commented code

* fixed grumbles

* fmt

* fixed widget names

* Add relayer strategy

* Add default relayer strategy

* default relayer strategy

* expose relayer strategy

* fix compile

* fix compile

* docs

* Rename Relayer to Relay, keep RelayerDecide

* split `DefaultRelayerStrategy` into `AltruisticRelayerStrategy` and `RationalRelayerStrategy`

* Remove relayer mode

* Remove unused import

* Rename `RelayerStrategy` to `RelayStrategy`

* Add missing docs

* clippy

* clippy

* clippy

* clippy

* Revert `relayer_mode` and add `MixStrategy`

* Add `EnforcementStrategy`

* fix bug and simplify relay strategy

* Update message_lane_loop.rs

* Update messages_target.rs

* clippy

* clippy

* clippy

* clippy

* clippy

* clippy

* clippy

* fix test

* fix test

* test

test

test

fix test

* transactions mortality in message and complex relays

* logging + enable in test deployments

* spellcheck

* fmt

* Unify error enums in substrate and ethereum clients with `thiserror`

Related to https://github.com/paritytech/parity-bridges-common/issues/857

* Add license pre-amble

* rustfmt

* Fix spelling

* Alter gitlab.

* Use substrate's rustfmt.toml

* cargo +nightly fmt --all

* Fix spellcheck.

* cargo +nightly fmt --all

* format.

* Fix spellcheck and fmt

* fmt?

* Fix spellcheck

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

* box large arguments

* benchmarks

* fix