* 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]>

* Update web3 dependency.

* Switch to crates.io.

Bumps [async-trait](https://github.com/dtolnay/async-trait) from 0.1.35 to 0.1.36.
- [Release notes](https://github.com/dtolnay/async-trait/releases)
- [Commits](https://github.com/dtolnay/async-trait/compare/0.1.35...0.1.36)

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

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

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.112 to 1.0.114.
- [Release notes](https://github.com/serde-rs/serde/releases)
- [Commits](https://github.com/serde-rs/serde/compare/v1.0.112...v1.0.114)

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

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

* Substrate 606c56d2e2f69f68f3947551224be6a3515dff60

* update jsonrpsee

* Revert "Bump async-std from 1.5.0 to 1.6.0 (#126)"

This reverts commit a865976e.

* Add async-std=1.6 to ignore.

* ethereum exchange module

* continue

* continue

* added tests for exchange module

* moved

* remove println

* move again

* fixes

* removed redundant deps

* cargo fmt

* fund_locks_transaction_decode_works

* cargo fmt --all

* fix error processing

* added some tracing to bridge modules

* more tests

* more tests

* cargo fmt --all

* kovan.rs -> exchange.rs

* Update bin/node/runtime/src/exchange.rs

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

* added assumption doc

* Airdrop -> DepositInto

* AsIs -> Identity

* OnTransactionSubmitted

* Transfers::Key = Id

* typo

* Update bin/node/runtime/src/exchange.rs

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

* block+tx+proof -> proof { block, tx, proof }

* cargo fmt --all

* docs

* check <-> verify

* parse hex

* extracted exchange primitives to separate crate

* added docs to runtime::exchange module

* Update bin/node/runtime/src/exchange.rs

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

* typo

* Update modules/currency-exchange/Cargo.toml

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

* add docs to currency-exchange module

* change tests names

* cargo fmt --all

* Update bin/node/runtime/src/exchange.rs

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

* Update bin/node/runtime/src/exchange.rs

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

* Update bin/node/runtime/src/exchange.rs

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

* Update bin/node/runtime/src/exchange.rs

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

* Update bin/node/runtime/src/exchange.rs

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

* fixed verify_transaction_finalized for siblings of finalized blocks

* cargo fmt --all

* added double spend note

* cargo fmt --all

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

* bump substrate

* cargo fmt --all

* 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

* Use `CallRequest` type from rust-web3 crate

* Change CallRequest's `to` field to be optional

Required due to changes in upstream `rust-web3` crate.

* Bump rust-web3 to latest master

* Use tagged release from crates.io

* Add check for `logs_bloom`

Since this is required by the runtime we want to enforce that an
incoming header has this.

* solidity contract

* continue

* upd

* cargo update

* fixes

* ehtereum_headers -> headers

* extracted some common stuff

* ethereum_sync.rs -> sync.rs

* make sync generic

* continue extracting

* continue

* add eth-contract argument

* continue

* some fixes

* contract v2

* continue

* more fixes

* more fixes

* deal with duplicated params

* removed multiple call_rpc variants

* bail_on_error!()

* fn submit_ethereum_transaction

* more fixes

* cargo fmt --all

* fix

* bail_on_arg_error!()

* fix

* fix

* remove async_extra stuff

* substrate-bridge.json -> substrate-bridge-abi.json

* get rid of substrate transactions hashes

* get rid of ethereum transactions hashes

* extracted contract bytecode to separate file

* cargo fmt --all

* avoid duplicate import in contracts

* removed Default::default()

* swapped configurations for sub2eth && eth2sub

* fix compilation

* do not double gas limit when submitting Substrate headers

* cargo fmt --all

* solidity contract removed

* consts

* extracted solc compilation details to separate file

* removed (obsolete in future Vec<u8> justification)

* fixed cli option description

* fix typos

* fix grumble

* extracted constants

* log decoded header

* cargo fmt --all

* comment

* new substrate version + actually verify justification

* cargo update + fix remaining stuff

* add weight=0 comments

* cargo fmt --all

* fix hash types

* renamed to-be-generic files

* make everything required generic over source/target chains

* some more fixes

* cargo fmt --all

* trait functions -> trait constants

* cargo --fmt --all

* Bump time from 0.1.42 to 0.2.9

Bumps [time](https://github.com/time-rs/time) from 0.1.42 to 0.2.9.
- [Release notes](https://github.com/time-rs/time/releases)
- [Changelog](https://github.com/time-rs/time/blob/master/CHANGELOG.md)
- [Commits](https://github.com/time-rs/time/commits/v0.2.9)

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

* Update to new API.

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

* Update dependencies

Upgrades Substrate based dependencies from v2.0.0 -> v2.0.0-alpha.1
and uses the `jsonrpsee`'s new feature flags. The actual code hasn't
been updated though, so this won't compile.

* Use `RawClient`s from `jsonrpsee`

* Update to use jsonrpsee's new API

* Hook up Ethereum Bridge Runtime, Relay, and Node Runtime

* Bump `parity-crypto` from v0.4 to v0.6

Fixes error when trying to compile tests. This was caused by
`parity-crypto` v0.4's use of `parity-secp256k1` over `secp256k1'.
Using the Parity fork meant multiple version of the same underlying
C library were being pulled in. `parity-crypto` v0.6 moved away from
this, only relying on `secp256k1` thus fixing the issue.

commit 657deb4cf4b90f24b9c5bfd62764b197776c262c
Author: Hernando Castano <[email protected]>
Date:   Wed Jan 29 20:14:20 2020 -0500

    Move Slava's bridge code into relays folder

commit 4868c42c7da959dde7252766996b3ed4e408e439
Author: Hernando Castano <[email protected]>
Date:   Wed Jan 29 20:01:06 2020 -0500

    Move files into `modules/ethereum`

commit d1093f3e4238acb1a1a020011452cb928d3f8d7a
Merge: 29dc6f9 bfd30ef
Author: Hernando Castano <[email protected]>
Date:   Wed Jan 29 19:59:27 2020 -0500

    Merge branch 'master' of slava-async-bridge

commit 29dc6f97b1b7d1db99086d35a5336f43d2f0f8af
Author: Hernando Castano <[email protected]>
Date:   Wed Jan 29 19:51:31 2020 -0500

    Squashed commit of the following:

    commit 265365920836bb1d286c9b48b1902a2de278fdd9
    Author: Hernando Castano <[email protected]>
    Date:   Wed Jan 29 19:51:15 2020 -0500

        Move hc-jp-bridge repo to different folder

    commit 8271991e95320baba70bd1cb9c4234d0ffd5b638
    Merge: 04c393f3 304cbc5
    Author: Hernando Castano <[email protected]>
    Date:   Wed Jan 29 19:36:41 2020 -0500

        Merge branch 'hc-jp-bridge-module' of hc-jp-bridge-module

    commit 304cbc5f02d003ffa5404c1c01e461e5b8539888
    Author: Hernando Castano <[email protected]>
    Date:   Wed Jan 29 00:38:27 2020 -0500

        Update bridge pallet to work with the (almost) lastest master (#4672)

        * Update decl_error usage

        * WIP: Update error handling to use DispatchResult

        * Get module compiling with new error handling

        * Make tests compile again

        Main change was updating the usage of InMemoryBackend

        * Move `sp-state-machine` into dev-dependencies

        * Bump dependencies to v2.0.0

        * Remove some stray comments

        * Appy code review suggestion

    commit 510cd6d96372688517496efa61773ea2839f8474
    Author: Hernando Castano <[email protected]>
    Date:   Tue Dec 17 12:52:51 2019 -0500

        Move Bridge Pallet into FRAME (#4373)

        * Move `bridge` crate into `frame` folder

        * Make `bridge` pallet compile after `the-big-reorg`

    commit ab54e838ef75e6a3f68fd0944bf22598c10c552f
    Author: Hernando Castano <[email protected]>
    Date:   Mon Nov 11 21:56:40 2019 +0100

        Use new StorageProof type from #3834

    commit 8fc8911fd1b4acc2274c6863fb3dba91b30c90af
    Author: Hernando Castano <[email protected]>
    Date:   Tue Nov 5 00:50:34 2019 +0100

        Verify Ancestry between Headers (#3963)

        * Create module for checking ancestry proofs

        * Use Vec of Headers instead of a HashMap

        * Move the ancestry verification into the lib.rs file

        * Change the proof format to exclude `child` and `ancestor` headers

        * Add a testing function for building header chains

        * Rename AncestorNotFound error to InvalidAncestryProof

        * Use ancestor hash instead of header when verifying ancestry

        * Clean up some stuff missed in the merge

    commit dbe85738b68358b790cf927b34a804b965a88f96
    or: Hernando Castano <[email protected]>
    Date:   Fri Nov 1 15:41:58 2019 +0100

        Check given Grandpa validator set against set found in storage (#3915)

        * Make StorageProofChecker happy

        * Update some tests

        * Check given validator set against set found in storage

        * Use Finality Grandpa's Authority Id and Weight

        * Add better error handling

        * Use error type from decl_error! macro

    commit 31b09216603d3e9c21144ce8c0b6bf59307a4f97
    or: Hernando Castano <[email protected]>
    Date:   Wed Oct 23 14:55:37 2019 +0200

        Make tests work after the changes introduced in #3793 (#3874)

        * Make tests work after the changes introduced in #3793

        * Remove unneccessary import

    commit bce6d804aa86504599ff912387295c58f846cbf3
    Author: Jim Posen <[email protected]>
    Date:   Thu Oct 10 12:18:58 2019 +0200

        Logic for checking Substrate proofs from within runtime module. (#3783)

    commit a7013e94b6c772c1d45a7cacbb445f73f6554fca
    Author: Hernando Castano <[email protected]>
    Date:   Fri Oct 4 15:21:00 2019 +0300

        Allow tracking of multiple bridges

    commit 3cf648242d631e32bd553a67df54bf5a48912839
    Author: Hernando Castano <[email protected]>
    Date:   Tue Oct 1 14:55:04 2019 +0200

        Add BridgeId => Bridge mapping

    commit 001c74c45072213e01857d0a2454379b447c5a76
    Author: Hernando Castano <[email protected]>
    Date:   Tue Oct 1 11:10:19 2019 +0200

        Get the mock runtime for tests set up

    commit 38443a1e8b424ed2f148eb95121d009f730e3b5a
    Author: Hernando Castano <[email protected]>
    Date:   Fri Sep 27 14:52:53 2019 +0200

        Clean up some warnings

    commit bdc3b01401e89c7111f8bf71f84c50750d25089f
    Author: Hernando Castano <[email protected]>
    Date:   Thu Sep 26 16:41:01 2019 +0200

        Add more skeleton code

    commit 26995efbf4bac2842eb2822322f7ad3c3e88feb8
    Author: Hernando Castano <[email protected]>
    Date:   Wed Sep 25 15:16:57 2019 +0200

        Create `bridge` module skeleton

commit bfd30ef8363b1483ef1107ae1eb958a4e944c93b
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Tue Dec 10 12:10:53 2019 +0300

    actually use signer from CLI to sign Substrate transactions

commit 504028eac60d9d14ba95b506cd355b0d2f405ce0
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Tue Dec 10 12:02:22 2019 +0300

    go offline for a bit on connection error

commit 446d0c8d20187dfd1beb173958ea28f2ad97887d
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Tue Dec 10 11:25:50 2019 +0300

    enable info logs by default

commit d039c60ec72bc91adfdad85442bc99a93b7f8e8d
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Tue Dec 10 11:12:51 2019 +0300

    support basic CLI arguments

commit 65c6d48e23576f36e8541878b920a03730226392
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Mon Dec 9 15:37:48 2019 +0300

    fix restart

commit 96e94c1c4b22d732078f8c401b872c5f8246c3fe
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Mon Dec 9 14:57:53 2019 +0300

    license

commit 68f4191e6cdd211ac8975e0b79f8a6f46a3ca953
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Mon Dec 9 14:56:05 2019 +0300

    restart sync when Substrate reorgs && we are unlucky

commit 29887c446167d580d73cc03a0b71c31890cafb51
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Mon Dec 9 13:49:31 2019 +0300

    only read genesis hash once

commit 832492b8393fe2063adf9c58c2b9e060dc3e4efb
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Mon Dec 9 13:23:26 2019 +0300

    changed TODO

commit 9dbc130e5fa036ae63d973819daf30f4ed6ffb5b
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Mon Dec 9 13:16:56 2019 +0300

    removed obsolete exit future

commit d03408cd8284eb0c61e7e96429b4f6199353e030
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Mon Dec 9 13:16:17 2019 +0300

    removed obsolete TODOs + moved a couple of TODOs to runtime module

commit ed8bec44b79f9a2ce829e59f10181368b2f42139
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Mon Dec 9 12:37:05 2019 +0300

    explained TODO fix

commit aa9c4c66ec2904eeb6072d654718b0ac0b7d8803
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Mon Dec 9 12:28:09 2019 +0300

    fix tx outcome serialization

commit 126f8f5484dac8c4af588ae86dc8855919d6c822
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Mon Dec 9 12:05:05 2019 +0300

    prune old ethereum headers when Substrate best header is too far in the future

commit c7bd301e631a44fe3263e188d0956081aa84f31e
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Fri Dec 6 12:51:50 2019 +0300

    fix trace

commit 549bb7acdb30cfdafe6c8600f0410212539ea63d
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Fri Dec 6 12:51:26 2019 +0300

    tx hashes are already a part of Block response

commit 7864017909f87ea36955d605a924c3c88bc88df3
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Thu Dec 5 12:29:37 2019 +0300

    submit bunch of headers at once + some fixes

commit 96485f85d38c144f0771f02ba692216a60356665
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Wed Dec 4 17:22:13 2019 +0300

    print status messages

commit ae0ec4c087136db653339537daab7f96a8c21b65
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Wed Dec 4 17:06:00 2019 +0300

    continue actual Substrate client implementation

commit 8146293740d70b88904568ff8e5acdfbadf06fd3
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Wed Dec 4 13:49:30 2019 +0300

    fix IncompleteHeader condition

commit 767c6201157dabcccf7f62e643681ca298224fb1
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Wed Dec 4 10:55:06 2019 +0300

    actual Substrate client implementation

commit 221fd4ccd2b1eea12c9dacf800d80e15ec115c1b
Author: Svyatoslav Nikolsky <[email protected]>
Date:   Wed Nov 20 17:28:13 2019 +0300

    initial commit