Submit exchange transactions to PoA node (#229)

* submit Eth exchange transactions

* submit ethereum in docker-compose

* submit Eth exchange transactions

* fix duplicate message

* fix relay script

* lost file

* cargo fmt --all

* cargo +nightly clippy

* Show sccache

* remove test-helpers remains

* what's going on with jsonrpsee + Cargo.lock?

* relay-eth-submit-exchange-tx -> poa-exchange-tx-generator

* Update relays/ethereum/src/main.rs

Co-authored-by: Tomasz Drwięga <tomusdrw@users.noreply.github.com>

* configuring exchange-gen loop using env variables

* fixed signer account from dev chain to Arthur

* improve debug prints

* parse nonce from relay output

* --eth-nonce=

* fix compilation

* cargo fmt --all

* fix typo

* duplicate relay output to tty

* allow using from bash scripts tests

* fix: U256::parse() expects hex string :/

* cargo fmt --all

* BRIDGE_HASH: ${BRIDGE_HASH:-master}

* script comment

* generate exchange PoA transactions by Bertha

* Bertha address

Co-authored-by: Denis S. Soldatov aka General-Beck <general.beck@gmail.com>
Co-authored-by: Tomasz Drwięga <tomusdrw@users.noreply.github.com>

bridges/bin/node/runtime/Cargo.toml

@@ -214,7 +214,7 @@ features = ["hmac"]
 [dev-dependencies.sp-bridge-eth-poa]
 version = "0.1.0"
 default-features = false
-features = ["std", "test-helpers"]
+features = ["std"]
 path = "../../../primitives/ethereum-poa"
 
 [build-dependencies.wasm-builder-runner]
@@ -264,6 +264,5 @@ runtime-benchmarks = [
 	"libsecp256k1",
 	"pallet-bridge-currency-exchange/runtime-benchmarks",
 	"pallet-bridge-eth-poa/runtime-benchmarks",
-	"sp-bridge-eth-poa/test-helpers",
 	"sp-runtime/runtime-benchmarks",
 ]