* improve some relay errors readability

* clippy

* use specific error for case when para head is missing from the bridge pallet

* fix match to support both error types

* batch transactions in message relay: API prototype

* get rid of Box<dyn BatchTransaction> and actually submit it

* test batch transactions

* message_lane_loop_works_with_batch_transactions

* removed logger

* BatchConfirmationTransaction + BatchDeliveryTransaction

* more prototyping

* fmt

* continue with batch calls

* impl BatchCallBuilder for ()

* BatchDeliveryTransaction impl

* BundledBatchCallBuilder

* proper impl of BundledBatchCallBuilder + use it in RialtoParachain -> Millau

* impl prove_header in OnDemandHeadersRelay

* impl OnDemandParachainsRelay::prove_header (needs extensive tests)

* added a couple of TODOs

* return Result<Option<BatchTx>> when asking for more headers

* prove headers when reauire_* is called && return proper headers from required_header_id

* split parachains::prove_header and test select_headers_to_prove

* more traces and leave TODOs

* use finality stream in SubstrateFinalitySource::prove_block_finality

* prove parachain head at block, selected by headers relay

* const ANCIENT_BLOCK_THRESHOLD

* TODO -> proof

* clippy and spelling

* BatchCallBuilder::build_batch_call() returns Result

* read first proof from two streams

* FailedToFindFinalityProof -> FinalityProofNotFound

* changed select_headers_to_prove to version from PR review

* 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]>

* cumulus: 4e952282914719fafd2df450993ccc2ce9395415
polkadot: 975e780ae0d988dc033f400ba822d14b326ee5b9
substrate: 89fcb3e4f62d221d4e161a437768e77d6265889e

* fix refs

* sync changes from https://github.com/paritytech/polkadot/pull/3828

* sync changes from https://github.com/paritytech/polkadot/pull/4387

* sync changes from https://github.com/paritytech/polkadot/pull/3940

* sync with changes from https://github.com/paritytech/polkadot/pull/4493

* sync with changes from https://github.com/paritytech/polkadot/pull/4958

* sync with changes from https://github.com/paritytech/polkadot/pull/3889

* sync with changes from https://github.com/paritytech/polkadot/pull/5033

* sync with changes from https://github.com/paritytech/polkadot/pull/5065

* compilation fixes

* fixed prometheus endpoint startup (it now requires to be spawned within tokio context)

* 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

* Upgrade `jsonrpsee` to v0.3

* whitespace

* fmt

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

* 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]>

* 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]>

* update jsonrpsee

* test

* Revert "test"

This reverts commit 2b69652a.

* update jsonrpsee to 0.2.0-alpha.5

* cargo fmt

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

* Fix typo

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

* 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

* 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]>

* Remove chains.

* Move relay clients.

* Flatten generic.

* Fix fmt.

* Nest some crates.

* Alter command execution to make it easier to add new bridges.

* Rename sub-dirs.

* cargo fmt --all

* Address clippy.

* Update relays/substrate/src/rialto_millau/cli.rs

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

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

* POC jsonrpsee v2

* POC update ws client

* connect to eth nodes using ws

* fix for subscriptions

* reverted unncecessary changes

* reference jsonrpsee from crates.io

* fixed eth port in deployments

* fmt

* order deps

* remove unnecessary comment

* clone is no longer required for subscriptions

* treat RpcError::Internal as connection error

* resubscribe on terminate

* Update deployments/bridges/poa-rialto/entrypoints/poa-exchange-tx-generator-entrypoint.sh

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

* Revert "Pin Rust Nightly to 2020-12-17 (#652)"

This reverts commit e54e6f7e.

* fix clippy

* clippy again

* more clippy in test code

* and new cargo fmt

* another try

* Bump substrate deps.

* Bump scale.

* Bump ethabi.

* Remove inherent from aura.

* Migrate to construct_runtime

* cargo fmt --all

* Allow bridge pallet to return no finalized headers

* Update Runtime APIs to optionally return best finalized header

* Update relay to handle optional best finalized headers

* Fix Clippy lints

* Return a dummy header instead of an Option

* Remove Option from runtime Apis

* Remove support for handling optional finalized headers in relay

* limit messages in the batch by weight/count

* fixed components compilation

* reverted obsolete parts of #469

* implement generated_messages_weights

* actually use computed weight in message proof

* fmt and clippy

* fixed TODO

* clippy

* Update relays/messages-relay/src/message_race_loop.rs

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

* add issue reference

* add assert message

* grumbles

* fmt

* reexport weight from bp-message-lane

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

* substrate relay guards

* checked time condition

* ChainWithBalances

* removed obsolete comment

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

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

* trailing space

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

* 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]>