* maintain MillauHeadersToRialto sync by subscribing to Millau justifications

* more tracing in maintain

* Update relays/substrate/src/headers_maintain.rs

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

* Update relays/substrate/src/headers_maintain.rs

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

* -Please

* -TODO

* revert raise recursion limit

* updated comment

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

* substrate-relay: initial commit

* MillauHeaderApi and RialtoHeaderApi

* post-merge fixes + TODOs + compilation

* extracting sub clients

* fmt + lost docs

* revert enum BridgeInstance

* apply suggestions from review

* explicite debug impl

* remove unused imports from Millau

* fix typo

* fix instance + API name

* Update relays/ethereum/src/ethereum_sync_loop.rs

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

* separate crates for millau and rialto client

* cargo fmt

* fix

* fmt

* remove no_std support

* fix compilation again

* Update relays/substrate-client/Cargo.toml

* Update relay clients to Substrate 2.0

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

* relay-ethereum-client

* use relay-ethereum-client from ethereum-poa-relay

* cargo fmt --all

* #![warn(missing_docs)]

* EthereumRpcClient -> EthereumClient

* make EthereumHeadersSyncPipeline private

* return concrete type from crate::new

* cleanup dependencies

* *self -> self

* remove trait Client

* sort deps

* extracted relay crates

* moved metrics to utils

* exchange-relay compilation

* fix compilation of headers-relay

* fixed messages-relay compilation

* fixed ethereum-poa-relay compilation

* cargo lock

* cargo fmt --all

* clippy

* cargo fmt --all

* fix tests compilation

* clippy

* eof

* module level docs

* removed obsolete comment

* #![warn(missing_docs)]

* .0 -> Deref

* post-merge fix

* cargo fmt

* Update relays/headers-relay/src/headers.rs

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

* Update relays/headers-relay/src/headers.rs

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

* Update relays/headers-relay/src/lib.rs

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

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

* fixed PoA contract deploy (granda_authorities call)

* pause if all submitted headers were rejected

* give funds to Bertha and Carlos

* max 1 active PoA transaction in headers sync :(

* display initial header id when deploying PoA contract

* cargo fmt + clipy

* update PoA contract to accept <= 4 Substrate headers at once

* pause submitting headers when contract rejects all new headers + we have active transactions

* fix compilation

* cargo fmt --all

* does_not_select_new_headers_to_submit_when_submit_is_paused

* updated bridge contract

* Update relays/ethereum/src/sync.rs

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

* WiP.

* Submit first incomplete header.

* Finish up test.

* cargo fmt --all

* Remove redundant clone.

* Address review comments.

* cargo fmt --all

* Fix clippy.

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

* gas_used should be cumulative_gas_used!!!

* more runtime traces

* improve logs

* fixed PoA contract deploy (granda_authorities call)

* pause if all submitted headers were rejected

* give funds to Bertha and Carlos

* max 1 active PoA transaction in headers sync :(

* display initial header id when deploying PoA contract

* cargo fmt + clipy

* fix compilation

* Update relays/ethereum/src/sync_types.rs

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

* Update relays/ethereum/src/utils.rs

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

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

* auto relay exchange transactions

* docker + auto-relay-tx

* clippy

* jsonrpsee in Cargo.lock ???

* fix tests compilation

* Show sccache

* mute clippy

* move

* Update relays/ethereum/src/exchange.rs

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

* finish comment

* (bool, String) -> StringifiedMaybeConnectionError

* Update deployments/rialto/docker-compose.yml

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

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

* 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]>

* 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]>

* Move EthereumRpc implementation to Eth client

* Move SubstrateRpc implementation to SubstrateClient

* Update deploy_contract to use new RPC interface

* Fix some types in the Substrate client

* Swap out method bodies in Eth sync loop

* Swap out method bodies in Substrate sync loop

* Remove Client from SourceClient trait return types

* Remove Client from TargetClient trait return types

* Remove client from Source select! arms

* Remove client from Target select! arms

* Add missing mutable refs in Substrate client

* Use mutable references in Source/Target Client traits

* Try and use mutable references in Source/Client trait implementations

* Handle errors more gracefully

* Remove unused imports

* Remove dead_code and unused_variables lints

* Remove usage of `jsonrpsee::RawClient`

By using a `jsonrpsee::Client` we are able to remove all the shared
mutable references required when interacting with the RPC server. This
is convenient as trying to sharing mutable references in code that uses
async/await is a bit of a pain.

However, using a `Client` instead of a `RawClient` is not yet supported
by the `jsonrpsee::rpc_api` macro, so a fork must be used for the moment.

* Clean up dead code and warnings

* Clean up higher level RPCs

Some of the RPCs that were "high level" didn't necessarily belong
as part of the trait, so they were removed.

* Use positional parameters for RPCs

Both Substrate and Ethereum's RPCs use positional (array) parameters,
so in order to be compatible with both we need to make sure that
our API is defined with positional paramters in mind.

* Rename argument for eth_getBlockByNumber

* Remove some unecessary Ok-wraps

* Process client requests synchonously

Before the refactoring the sync loop would wait until a client finished
handling a request before issuing another one. This behaviour was
inadvertently changed during the refactoring leading to race conditions.
This commit makes sure that the previous behaviour is respected.

* Reduce the errors that are considered a connection error

* Only decode bridge contract once

* Set genesis_config at RPC client startup

* Fetch genesis hash in SubstrateRpcClient::new()

* Move Decode error into SubstrateNodeError

* Suppress warnings caused by `rpc_api!`

* Implement From RpcError for String

* Handle Substrate client initalization errors more gracefully

* Remove match in favour of ?

Co-authored-by: Svyatoslav Nikolsky <[email protected]>

* Test defining an RPC API

* Add wrapper clients for the RPC API

* Implement most Ethereum RPCs

Does not include RPCs that require the bridge contract.

* Implement a few of the Substrate RPCs

Still missing proper error handling, as well as decoding responses from the
Substrate node.

* Make error handling more ergonomic

* Implement Substrate RPCs that use `state_call`

* Implement rest of Substrate RPCs

* Implement `eth_call` RPC

This can be used to implement higher level requests like fetching Substrate headers
from an Ethereum node.

* Build some of the higher level Ethereum RPCs

Uses the new Ethereum RPC interface to do so

* Build some of the higher level Substrate RPCs

* Remove old Ethereum RPC methods

* Remove old Substrate RPC methods

* Add some documentation to Substrate RPCs

* Fix typo in enum construction

* Revert commits `0f0435d2` to `ca755029`

This range of commits was mainly trying to integrate the new RPC interface into the existing
codebase, however this turned out to be a little out of scope for the current PR. Instead this work
will be incorporated into a PR which aims to close #72.

* Add documentation to RPCs

* Rename functions in RPC API to conform to snake_case

* Check that header contains a number and hash

* Put doc comments on trait instead of impl methods

* Remove expect() calls

* Replace runtime API enums with consts

* Accept Bytes when submitting extrinsic

Let's us avoid using a runtime specific Extrinsic.

* Add strictly typed arguments to RPC API

Missing two methods right now, which require a `serde::Deserialize`
implemenation before they can be changed.

* Add `chain_getBlock` Substrate RPC

* Use typed arguments for `eth_estimateGas` and `eth_call`

* Silence dead code warnings

* Add check for logs bloom

* Remove unused variables

* Add documentation to RPC error enums