* relay headers between Kusama and Polkadot

* relay messages between Kusama and Polkadot

* complex Kusama <> Polkadot relayer

* expose relayer_fund_account_id from messages pallet

* create relayers fund accounts on Kusama/Polkadot + some more fixes

* fmt

* fix compilation

* compilation + clippy

* compilation

* MAXIMAL_BALANCE_DECREASE_PER_DAY for K<>P header relays

* fmt

* deduplicate tests

* Update modules/messages/src/lib.rs

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

* extract storage_parameter_key function

* other grumbles

* fix

* fmt

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

* increase pause before messages generation start

* spelling

* move some associated types from relay_substrate_client::Chain to bp_runtime::Chain

* dummy commit

* Revert "dummy commit"

This reverts commit 81bc64aa.

* resubmit transactions: start

* resubmit transactions: continue

* enable resubmitter in deployments

* clippy

* spellcheck

* Update relays/client-substrate/src/chain.rs

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

* fix compilation

* fix compilation

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

* fix delivery transaction estimation in greedy relayer

* fixed typo

* improve logging

* improve logging

* fmt

* fix compilation

* fmt

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

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

* review

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

* Remove redundant generic parameters from SubstrateMessagesSource

* Remove redundant generic parameters from SubstrateMessagesTarget

* use uniform alias naming

* use aliases instead of fully quallified syntax

* pr feedback

* mortal relay transactions

* sign block hash for mortal transactions

* TransactionEraOf

* add explanation

* enable mortal transactions for Westend -> Millau headers relay

* clippy

* spellcheck

* remove unused dev deps

* Removing unused deps

* update conversion rate: initial commit

* Rialto=Polkadot && Millau=Kusama + actually update conversion rates

* update deployment scripts and readme

* allow non-zero difference between stored and real rates

* dummy commit

* Revert "dummy commit"

This reverts commit a4381981.

* clippy

* #[allow(clippy::float_cmp)] in conversion rate update

* dummy

* Revert "dummy"

This reverts commit 90cd6e47.

* spell

* shared_value_ref() -> get()

* Revert "shared_value_ref() -> get()"

This reverts commit 20aa30de.

* fix(spellcheck): test of fixing

* fix(hunspell): improved many typos etc.

* fix(hunspell): all errors solved

* fix(hunspell): extended scope of files - the build should fail

* Return error code.

* Fix spelling, sort dictionary.

* fix(hunspell): added fix to gitlabs check

* fix(typo): one typo and test of verification on github

* fix(typo): one typo

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

* read justifications from stream using channel + task that fills that channel

* Arc<Mutex> -> Mutex

* remember new tokio runtime on reconnect

* compilation

* update jsonrpsee

* test

* Revert "test"

This reverts commit 2b69652a.

* Allow Root to assume SourceAccount.

* fmt code

* introduce relayer mode enum

* removed MaximalReward mode

* TODO

* Saturating -> SaturatingAdd

* ref issue in TODOs

* Update relays/messages/src/message_race_delivery.rs

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

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

* move ChainWithBalances::NativeBalance -> Chain::Balance

* dummy commit

* Revert "dummy commit"

This reverts commit c0064215.

* always run on-demand headers relay in complex relay

* fix compilation

* update jsonrpsee to 0.2.0-alpha.5

* cargo fmt

* (temporarily) switch to jsonrpsee master

* removed param used for tests

* complex headers+messages relay

* post-merge fix

* fix + test issue with on-demand not starting

* use Substrate state_getReadProof method instead of pallet-bridge-messages-rpc

* Fix typo

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

* Bump `jsonrpsee` to `alpha.3`

* Arc-ify `WsClient`

* Bump Substrate

* Change usage of "Module" to "Pallet"

Related Substrate PR: https://github.com/paritytech/substrate/pull/8372

* Add `OnSetCode` config param

Related Substrate PR: https://github.com/paritytech/substrate/pull/8496

* Update Aura Slot duration time type

Related Substrate PR: https://github.com/paritytech/substrate/pull/8386

* Add `OnSetCode` to mock runtimes

* Add support for multiple justifications

Related Substrate PR: https://github.com/paritytech/substrate/pull/7640

* Use updated justification type in more places

* Make GenesisConfig type non-optional

Related Substrate PR: https://github.com/paritytech/substrate/pull/8275

* Update service to use updated telemetry

Related Substrate PR: https://github.com/paritytech/substrate/pull/8143

* Appease Clippy

* administrative metrics

* fmt

* fix compilation

* fix compilation again

* and another one

* remove GenericLoopMetrics

* chttp -> isahc

* remove redundant marker

* not about price metrics

* fmt

* Update copyright date to 2021

* Bump date in license header template

* Stop passing raw encoded justifications to pallet API

By having the API accept a struct-ified justification we are able to
better utilize the justifications fields for weight calculations.

* Update relayer code to use decoded justifications

* Add justification to `expect()` statement

* Fix some imports

* Make justification wrapper contain decoded justification

* Rename some fields

* Get rid of warnings

* Appease Clippy

* Only decode justification once at init time

* Remove unnecessary method

* Remove justification wrapper

This became kinda unnecessary since we could implement the FinalityProof
trait on GrandpaJustification directly.

* Start generalizing rialto-millau commands.

* cargo fmt --all

* Introduce generic balance.

* Unify message payloads.

* cargo fmt --all

* init - generic

* Attempt to unify send message.

* Start moving things around.

* cargo fmt --all

* Move init-bridge.

* cargo fmt --all

* Improve UX of bridge argument.

* Fix clippy.

* Fix docs and scripts.

* Add docs.

* Apply suggestions from code review

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

* Fix copyright.

* Add issue numbers.

* More todos.

* Update comments.

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

* on-demand headers relay

* bool::then

* move file

* atomic submit_signed_extrinsic

* remove cli options from future

* test on-demand relay

* TODOs

* fixed initialization call for Westend -> Millau

* Update relays/client-substrate/src/client.rs

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

* removed on_demand_headers_relay.rs

* on_demand_headers_relay traces

* fix compilation

* fmt

* docs

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

* Remove chains.

* Move relay clients.

* Flatten generic.

* Fix fmt.