Add a Node (#22)

* Copy node-template over from Substrate repo

Got the template at rev=6e6d06c33911

* Use dependencies from crates.io + stop renaming on import

* Remove template pallet

* Stop using crates.io dependencies

Instead they're going to be pinned at v2.0.0-alpha.2
at commit `2afecf81ee19b8a6edb364b419190ea47c4a4a31`
until something stable comes along.

* Remove LICENSE

* Change references of `node-template` to `bridge-node`

* Remove README

* Fix some missed node-template references

* Add WASM toolchain to CI

* Be more specific about nightly version to use

* Maybe don't tie to a specific nightly

* Use composite accounts

* Update to use lazy reaping

* Only use Development chain config

bridges/bin/node/node/Cargo.toml

+[package]
+name = "bridge-node"
+version = "0.1.0"
+authors = ["Parity Technologies <admin@parity.io>"]
+edition = "2018"
+build = "build.rs"
+homepage = "https://substrate.dev"
+repository = "https://github.com/paritytech/parity-bridges-common/"
+
+[[bin]]
+name = "bridge-node"
+
+[dependencies]
+futures = "0.3.1"
+log = "0.4.8"
+structopt = "0.3.8"
+bridge-node-runtime = { version = "0.1.0", path = "../runtime" }
+
+[dependencies.sc-cli]
+version = "0.8.0-alpha.2"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate.git"
+
+[dependencies.sp-core]
+version = "2.0.0-alpha.2"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate.git"
+
+[dependencies.sc-executor]
+version = "0.8.0-alpha.2"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate.git"
+
+[dependencies.sc-service]
+version = "0.8.0-alpha.2"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate.git"
+
+[dependencies.sp-inherents]
+version = "2.0.0-alpha.2"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate.git"
+
+[dependencies.sc-transaction-pool]
+version = "2.0.0-alpha.2"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate.git"
+
+[dependencies.sp-transaction-pool]
+version = "2.0.0-alpha.2"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate.git"
+
+[dependencies.sc-network]
+version = "0.8.0-alpha.2"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate.git"
+
+[dependencies.sc-consensus-aura]
+version = "0.8.0-alpha.2"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate.git"
+
+[dependencies.sp-consensus-aura]
+version = "0.8.0-alpha.2"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate.git"
+
+[dependencies.sp-consensus]
+version = "0.8.0-alpha.2"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate.git"
+
+[dependencies.grandpa]
+package = "sc-finality-grandpa"
+version = "0.8.0-alpha.2"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate.git"
+
+[dependencies.grandpa-primitives]
+package = "sp-finality-grandpa"
+version = "2.0.0-alpha.2"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate.git"
+
+[dependencies.sc-client]
+version = "0.8.0-alpha.2"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate.git"
+
+[dependencies.sp-runtime]
+version = "2.0.0-alpha.2"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate.git"
+
+[dependencies.sc-basic-authorship]
+version = "0.8.0-alpha.2"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate.git"
+
+[build-dependencies]
+vergen = "3.0.4"
+
+[build-dependencies.build-script-utils]
+package = "substrate-build-script-utils"
+version = "2.0.0-alpha.2"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate.git"

bridges/bin/node/node/build.rs

+use vergen::{ConstantsFlags, generate_cargo_keys};
+
+const ERROR_MSG: &str = "Failed to generate metadata files";
+
+fn main() {
+	generate_cargo_keys(ConstantsFlags::SHA_SHORT).expect(ERROR_MSG);
+
+	build_script_utils::rerun_if_git_head_changed();
+}

bridges/bin/node/node/src/chain_spec.rs

+use sp_core::{Pair, Public, sr25519};
+use bridge_node_runtime::{
+	AccountId, AuraConfig, BalancesConfig, GenesisConfig, GrandpaConfig,
+	SudoConfig, SystemConfig, WASM_BINARY, Signature
+};
+use sp_consensus_aura::sr25519::{AuthorityId as AuraId};
+use grandpa_primitives::{AuthorityId as GrandpaId};
+use sc_service;
+use sp_runtime::traits::{Verify, IdentifyAccount};
+
+/// Specialized `ChainSpec`. This is a specialization of the general Substrate ChainSpec type.
+pub type ChainSpec = sc_service::ChainSpec<GenesisConfig>;
+
+/// The chain specification option. This is expected to come in from the CLI and
+/// is little more than one of a number of alternatives which can easily be converted
+/// from a string (`--chain=...`) into a `ChainSpec`.
+#[derive(Clone, Debug)]
+pub enum Alternative {
+	/// Whatever the current runtime is, with just Alice as an auth.
+	Development,
+}
+
+/// Helper function to generate a crypto pair from seed
+pub fn get_from_seed<TPublic: Public>(seed: &str) -> <TPublic::Pair as Pair>::Public {
+	TPublic::Pair::from_string(&format!("//{}", seed), None)
+		.expect("static values are valid; qed")
+		.public()
+}
+
+type AccountPublic = <Signature as Verify>::Signer;
+
+/// Helper function to generate an account ID from seed
+pub fn get_account_id_from_seed<TPublic: Public>(seed: &str) -> AccountId where
+	AccountPublic: From<<TPublic::Pair as Pair>::Public>
+{
+	AccountPublic::from(get_from_seed::<TPublic>(seed)).into_account()
+}
+
+/// Helper function to generate an authority key for Aura
+pub fn get_authority_keys_from_seed(s: &str) -> (AuraId, GrandpaId) {
+	(
+		get_from_seed::<AuraId>(s),
+		get_from_seed::<GrandpaId>(s),
+	)
+}
+
+impl Alternative {
+	/// Get an actual chain config from one of the alternatives.
+	pub(crate) fn load(self) -> Result<ChainSpec, String> {
+		Ok(match self {
+			Alternative::Development => ChainSpec::from_genesis(
+				"Development",
+				"dev",
+				|| testnet_genesis(
+					vec![
+						get_authority_keys_from_seed("Alice"),
+					],
+					get_account_id_from_seed::<sr25519::Public>("Alice"),
+					vec![
+						get_account_id_from_seed::<sr25519::Public>("Alice"),
+						get_account_id_from_seed::<sr25519::Public>("Bob"),
+						get_account_id_from_seed::<sr25519::Public>("Alice//stash"),
+						get_account_id_from_seed::<sr25519::Public>("Bob//stash"),
+					],
+					true,
+				),
+				vec![],
+				None,
+				None,
+				None,
+				None
+			),
+		})
+	}
+
+	pub(crate) fn from(s: &str) -> Option<Self> {
+		match s {
+			"" | "dev" => Some(Alternative::Development),
+			_ => None,
+		}
+	}
+}
+
+fn testnet_genesis(initial_authorities: Vec<(AuraId, GrandpaId)>,
+	root_key: AccountId,
+	endowed_accounts: Vec<AccountId>,
+	_enable_println: bool) -> GenesisConfig {
+	GenesisConfig {
+		frame_system: Some(SystemConfig {
+			code: WASM_BINARY.to_vec(),
+			changes_trie_config: Default::default(),
+		}),
+		pallet_balances: Some(BalancesConfig {
+			balances: endowed_accounts.iter().cloned().map(|k|(k, 1 << 60)).collect(),
+		}),
+		pallet_aura: Some(AuraConfig {
+			authorities: initial_authorities.iter().map(|x| (x.0.clone())).collect(),
+		}),
+		pallet_grandpa: Some(GrandpaConfig {
+			authorities: initial_authorities.iter().map(|x| (x.1.clone(), 1)).collect(),
+		}),
+		pallet_sudo: Some(SudoConfig {
+			key: root_key,
+		}),
+	}
+}
+
+pub fn load_spec(id: &str) -> Result<Option<ChainSpec>, String> {
+	Ok(match Alternative::from(id) {
+		Some(spec) => Some(spec.load()?),
+		None => None,
+	})
+}

bridges/bin/node/node/src/cli.rs

+use sc_cli::{RunCmd, Subcommand};
+use structopt::StructOpt;
+
+#[derive(Debug, StructOpt)]
+pub struct Cli {
+	#[structopt(subcommand)]
+	pub subcommand: Option<Subcommand>,
+
+	#[structopt(flatten)]
+	pub run: RunCmd,
+}

bridges/bin/node/node/src/command.rs

+// Copyright 2017-2020 Parity Technologies (UK) Ltd.
+// This file is part of Substrate.
+
+// Substrate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Substrate is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Substrate.  If not, see <http://www.gnu.org/licenses/>.
+
+use sp_consensus_aura::sr25519::{AuthorityPair as AuraPair};
+use sc_cli::VersionInfo;
+use crate::service;
+use crate::chain_spec;
+use crate::cli::Cli;
+
+/// Parse and run command line arguments
+pub fn run(version: VersionInfo) -> sc_cli::Result<()> {
+	let opt = sc_cli::from_args::<Cli>(&version);
+
+	let mut config = sc_service::Configuration::from_version(&version);
+
+	match opt.subcommand {
+		Some(subcommand) => {
+			subcommand.init(&version)?;
+			subcommand.update_config(&mut config, chain_spec::load_spec, &version)?;
+			subcommand.run(
+				config,
+				|config: _| Ok(new_full_start!(config).0),
+			)
+		},
+		None => {
+			opt.run.init(&version)?;
+			opt.run.update_config(&mut config, chain_spec::load_spec, &version)?;
+			opt.run.run(
+				config,
+				service::new_light,
+				service::new_full,
+				&version,
+			)
+		},
+	}
+}

bridges/bin/node/node/src/main.rs

+//! Substrate Node Template CLI library.
+#![warn(missing_docs)]
+
+mod chain_spec;
+#[macro_use]
+mod service;
+mod cli;
+mod command;
+
+fn main() -> sc_cli::Result<()> {
+	let version = sc_cli::VersionInfo {
+		name: "Bridge Node",
+		commit: env!("VERGEN_SHA_SHORT"),
+		version: env!("CARGO_PKG_VERSION"),
+		executable_name: "bridge-node",
+		author: "Parity Technologies",
+		description: "Bridge Node",
+		support_url: "https://github.com/paritytech/parity-bridges-common/",
+		copyright_start_year: 2017,
+	};
+
+	command::run(version)
+}

bridges/bin/node/node/src/service.rs

+//! Service and ServiceFactory implementation. Specialized wrapper over substrate service.
+
+use std::sync::Arc;
+use std::time::Duration;
+use sc_client::LongestChain;
+use bridge_node_runtime::{self, GenesisConfig, opaque::Block, RuntimeApi};
+use sc_service::{error::{Error as ServiceError}, AbstractService, Configuration, ServiceBuilder};
+use sp_inherents::InherentDataProviders;
+use sc_executor::native_executor_instance;
+pub use sc_executor::NativeExecutor;
+use sp_consensus_aura::sr25519::{AuthorityPair as AuraPair};
+use grandpa::{self, FinalityProofProvider as GrandpaFinalityProofProvider};
+
+// Our native executor instance.
+native_executor_instance!(
+	pub Executor,
+	bridge_node_runtime::api::dispatch,
+	bridge_node_runtime::native_version,
+);
+
+/// Starts a `ServiceBuilder` for a full service.
+///
+/// Use this macro if you don't actually need the full service, but just the builder in order to
+/// be able to perform chain operations.
+macro_rules! new_full_start {
+	($config:expr) => {{
+		let mut import_setup = None;
+		let inherent_data_providers = sp_inherents::InherentDataProviders::new();
+
+		let builder = sc_service::ServiceBuilder::new_full::<
+			bridge_node_runtime::opaque::Block, bridge_node_runtime::RuntimeApi, crate::service::Executor
+		>($config)?
+			.with_select_chain(|_config, backend| {
+				Ok(sc_client::LongestChain::new(backend.clone()))
+			})?
+			.with_transaction_pool(|config, client, _fetcher| {
+				let pool_api = sc_transaction_pool::FullChainApi::new(client.clone());
+				Ok(sc_transaction_pool::BasicPool::new(config, std::sync::Arc::new(pool_api)))
+			})?
+			.with_import_queue(|_config, client, mut select_chain, _transaction_pool| {
+				let select_chain = select_chain.take()
+					.ok_or_else(|| sc_service::Error::SelectChainRequired)?;
+
+				let (grandpa_block_import, grandpa_link) =
+					grandpa::block_import(client.clone(), &*client, select_chain)?;
+
+				let aura_block_import = sc_consensus_aura::AuraBlockImport::<_, _, _, AuraPair>::new(
+					grandpa_block_import.clone(), client.clone(),
+				);
+
+				let import_queue = sc_consensus_aura::import_queue::<_, _, _, AuraPair>(
+					sc_consensus_aura::slot_duration(&*client)?,
+					aura_block_import,
+					Some(Box::new(grandpa_block_import.clone())),
+					None,
+					client,
+					inherent_data_providers.clone(),
+				)?;
+
+				import_setup = Some((grandpa_block_import, grandpa_link));
+
+				Ok(import_queue)
+			})?;
+
+		(builder, import_setup, inherent_data_providers)
+	}}
+}
+
+/// Builds a new service for a full client.
+pub fn new_full(config: Configuration<GenesisConfig>)
+	-> Result<impl AbstractService, ServiceError>
+{
+	let is_authority = config.roles.is_authority();
+	let force_authoring = config.force_authoring;
+	let name = config.name.clone();
+	let disable_grandpa = config.disable_grandpa;
+
+	// sentry nodes announce themselves as authorities to the network
+	// and should run the same protocols authorities do, but it should
+	// never actively participate in any consensus process.
+	let participates_in_consensus = is_authority && !config.sentry_mode;
+
+	let (builder, mut import_setup, inherent_data_providers) = new_full_start!(config);
+
+	let (block_import, grandpa_link) =
+		import_setup.take()
+			.expect("Link Half and Block Import are present for Full Services or setup failed before. qed");
+
+	let service = builder
+		.with_finality_proof_provider(|client, backend|
+			Ok(Arc::new(GrandpaFinalityProofProvider::new(backend, client)) as _)
+		)?
+		.build()?;
+
+	if participates_in_consensus {
+		let proposer = sc_basic_authorship::ProposerFactory {
+			client: service.client(),
+			transaction_pool: service.transaction_pool(),
+		};
+
+		let client = service.client();
+		let select_chain = service.select_chain()
+			.ok_or(ServiceError::SelectChainRequired)?;
+
+		let can_author_with =
+			sp_consensus::CanAuthorWithNativeVersion::new(client.executor().clone());
+
+		let aura = sc_consensus_aura::start_aura::<_, _, _, _, _, AuraPair, _, _, _>(
+			sc_consensus_aura::slot_duration(&*client)?,
+			client,
+			select_chain,
+			block_import,
+			proposer,
+			service.network(),
+			inherent_data_providers.clone(),
+			force_authoring,
+			service.keystore(),
+			can_author_with,
+		)?;
+
+		// the AURA authoring task is considered essential, i.e. if it
+		// fails we take down the service with it.
+		service.spawn_essential_task("aura", aura);
+	}
+
+	// if the node isn't actively participating in consensus then it doesn't
+	// need a keystore, regardless of which protocol we use below.
+	let keystore = if participates_in_consensus {
+		Some(service.keystore())
+	} else {
+		None
+	};
+
+	let grandpa_config = grandpa::Config {
+		// FIXME #1578 make this available through chainspec
+		gossip_duration: Duration::from_millis(333),
+		justification_period: 512,
+		name: Some(name),
+		observer_enabled: false,
+		keystore,
+		is_authority,
+	};
+
+	let enable_grandpa = !disable_grandpa;
+	if enable_grandpa {
+		// start the full GRANDPA voter
+		// NOTE: non-authorities could run the GRANDPA observer protocol, but at
+		// this point the full voter should provide better guarantees of block
+		// and vote data availability than the observer. The observer has not
+		// been tested extensively yet and having most nodes in a network run it
+		// could lead to finality stalls.
+		let grandpa_config = grandpa::GrandpaParams {
+			config: grandpa_config,
+			link: grandpa_link,
+			network: service.network(),
+			inherent_data_providers: inherent_data_providers.clone(),
+			on_exit: service.on_exit(),
+			telemetry_on_connect: Some(service.telemetry_on_connect_stream()),
+			voting_rule: grandpa::VotingRulesBuilder::default().build(),
+		};
+
+		// the GRANDPA voter task is considered infallible, i.e.
+		// if it fails we take down the service with it.
+		service.spawn_essential_task(
+			"grandpa-voter",
+			grandpa::run_grandpa_voter(grandpa_config)?
+		);
+	} else {
+		grandpa::setup_disabled_grandpa(
+			service.client(),
+			&inherent_data_providers,
+			service.network(),
+		)?;
+	}
+
+	Ok(service)
+}
+
+/// Builds a new service for a light client.
+pub fn new_light(config: Configuration<GenesisConfig>)
+	-> Result<impl AbstractService, ServiceError>
+{
+	let inherent_data_providers = InherentDataProviders::new();
+
+	ServiceBuilder::new_light::<Block, RuntimeApi, Executor>(config)?
+		.with_select_chain(|_config, backend| {
+			Ok(LongestChain::new(backend.clone()))
+		})?
+		.with_transaction_pool(|config, client, fetcher| {
+			let fetcher = fetcher
+				.ok_or_else(|| "Trying to start light transaction pool without active fetcher")?;
+
+			let pool_api = sc_transaction_pool::LightChainApi::new(client.clone(), fetcher.clone());
+			let pool = sc_transaction_pool::BasicPool::with_revalidation_type(
+				config, Arc::new(pool_api), sc_transaction_pool::RevalidationType::Light,
+			);
+			Ok(pool)
+		})?
+		.with_import_queue_and_fprb(|_config, client, backend, fetcher, _select_chain, _tx_pool| {
+			let fetch_checker = fetcher
+				.map(|fetcher| fetcher.checker().clone())
+				.ok_or_else(|| "Trying to start light import queue without active fetch checker")?;
+			let grandpa_block_import = grandpa::light_block_import(
+				client.clone(), backend, &*client.clone(), Arc::new(fetch_checker),
+			)?;
+			let finality_proof_import = grandpa_block_import.clone();
+			let finality_proof_request_builder =
+				finality_proof_import.create_finality_proof_request_builder();
+
+			let import_queue = sc_consensus_aura::import_queue::<_, _, _, AuraPair>(
+				sc_consensus_aura::slot_duration(&*client)?,
+				grandpa_block_import,
+				None,
+				Some(Box::new(finality_proof_import)),
+				client,
+				inherent_data_providers.clone(),
+			)?;
+
+			Ok((import_queue, finality_proof_request_builder))
+		})?
+		.with_finality_proof_provider(|client, backend|
+			Ok(Arc::new(GrandpaFinalityProofProvider::new(backend, client)) as _)
+		)?
+		.build()
+}

bridges/bin/node/runtime/Cargo.toml

+[package]
+name = "bridge-node-runtime"
+version = "0.1.0"
+authors = ["Parity Technologies <admin@parity.io>"]
+edition = "2018"
+homepage = "https://substrate.dev"
+repository = "https://github.com/paritytech/parity-bridges-common/"
+
+[dependencies.codec]
+package = "parity-scale-codec"
+version = "1.0.0"
+default-features = false
+features = ["derive"]
+
+[dependencies.serde]
+version = "1.0.101"
+optional = true
+features = ["derive"]
+
+# Substrate Dependencies
+[dependencies.pallet-aura]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.pallet-balances]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.frame-support]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.pallet-grandpa]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.pallet-randomness-collective-flip]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.pallet-sudo]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.frame-system]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.pallet-timestamp]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.pallet-transaction-payment]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.frame-executive]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+# Substrate Primitives
+[dependencies.sp-api]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.sp-block-builder]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.sp-consensus-aura]
+version = "0.8.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.sp-core]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.sp-inherents]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.sp-io]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.sp-offchain]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.sp-runtime]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.sp-session]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.sp-std]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.sp-transaction-pool]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[dependencies.sp-version]
+version = "2.0.0-alpha.2"
+default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[build-dependencies.wasm-builder-runner]
+version = "1.0.5"
+package = "substrate-wasm-builder-runner"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
+
+[features]
+default = ["std"]
+std = [
+	"pallet-aura/std",
+	"pallet-balances/std",
+	"codec/std",
+	"frame-executive/std",
+	"frame-support/std",
+	"frame-system/std",
+	"pallet-grandpa/std",
+	"pallet-randomness-collective-flip/std",
+	"serde",
+	"sp-api/std",
+	"sp-block-builder/std",
+	"sp-consensus-aura/std",
+	"sp-core/std",
+	"sp-inherents/std",
+	"sp-io/std",
+	"sp-offchain/std",
+	"sp-runtime/std",
+	"sp-session/std",
+	"sp-std/std",
+	"sp-transaction-pool/std",
+	"sp-version/std",
+	"pallet-sudo/std",
+	"pallet-timestamp/std",
+	"pallet-transaction-payment/std",
+]

bridges/bin/node/runtime/build.rs

+use wasm_builder_runner::WasmBuilder;
+
+fn main() {
+	WasmBuilder::new()
+		.with_current_project()
+		.with_wasm_builder_from_crates("1.0.9")
+		.export_heap_base()
+		.import_memory()
+		.build()
+}

bridges/bin/node/runtime/src/lib.rs

+//! The Substrate Node Template runtime. This can be compiled with `#[no_std]`, ready for Wasm.
+
+#![cfg_attr(not(feature = "std"), no_std)]
+// `construct_runtime!` does a lot of recursion and requires us to increase the limit to 256.
+#![recursion_limit="256"]
+
+// Make the WASM binary available.
+#[cfg(feature = "std")]
+include!(concat!(env!("OUT_DIR"), "/wasm_binary.rs"));
+
+use sp_std::prelude::*;
+use sp_core::OpaqueMetadata;
+use sp_runtime::{
+	ApplyExtrinsicResult, transaction_validity::TransactionValidity, generic, create_runtime_str,
+	impl_opaque_keys, MultiSignature,
+};
+use sp_runtime::traits::{
+	BlakeTwo256, Block as BlockT, IdentityLookup, Verify, ConvertInto, IdentifyAccount
+};
+use sp_api::impl_runtime_apis;
+use sp_consensus_aura::sr25519::AuthorityId as AuraId;
+use pallet_grandpa::AuthorityList as GrandpaAuthorityList;
+use pallet_grandpa::fg_primitives;
+use sp_version::RuntimeVersion;
+#[cfg(feature = "std")]
+use sp_version::NativeVersion;
+
+// A few exports that help ease life for downstream crates.
+#[cfg(any(feature = "std", test))]
+pub use sp_runtime::BuildStorage;
+pub use pallet_timestamp::Call as TimestampCall;
+pub use pallet_balances::Call as BalancesCall;
+pub use sp_runtime::{Permill, Perbill};
+pub use frame_support::{
+	StorageValue, construct_runtime, parameter_types,
+	traits::Randomness,
+	weights::Weight,
+};
+
+/// An index to a block.
+pub type BlockNumber = u32;
+
+/// Alias to 512-bit hash when used in the context of a transaction signature on the chain.
+pub type Signature = MultiSignature;
+
+/// Some way of identifying an account on the chain. We intentionally make it equivalent
+/// to the public key of our transaction signing scheme.
+pub type AccountId = <<Signature as Verify>::Signer as IdentifyAccount>::AccountId;
+
+/// The type for looking up accounts. We don't expect more than 4 billion of them, but you
+/// never know...
+pub type AccountIndex = u32;
+
+/// Balance of an account.
+pub type Balance = u128;
+
+/// Index of a transaction in the chain.
+pub type Index = u32;
+
+/// A hash of some data used by the chain.
+pub type Hash = sp_core::H256;
+
+/// Digest item type.
+pub type DigestItem = generic::DigestItem<Hash>;
+
+/// Opaque types. These are used by the CLI to instantiate machinery that don't need to know
+/// the specifics of the runtime. They can then be made to be agnostic over specific formats
+/// of data like extrinsics, allowing for them to continue syncing the network through upgrades
+/// to even the core data structures.
+pub mod opaque {
+	use super::*;
+
+	pub use sp_runtime::OpaqueExtrinsic as UncheckedExtrinsic;
+
+	/// Opaque block header type.
+	pub type Header = generic::Header<BlockNumber, BlakeTwo256>;
+	/// Opaque block type.
+	pub type Block = generic::Block<Header, UncheckedExtrinsic>;
+	/// Opaque block identifier type.
+	pub type BlockId = generic::BlockId<Block>;
+
+	impl_opaque_keys! {
+		pub struct SessionKeys {
+			pub aura: Aura,
+			pub grandpa: Grandpa,
+		}
+	}
+}
+
+/// This runtime version.
+pub const VERSION: RuntimeVersion = RuntimeVersion {
+	spec_name: create_runtime_str!("bridge-node"),
+	impl_name: create_runtime_str!("bridge-node"),
+	authoring_version: 1,
+	spec_version: 1,
+	impl_version: 1,
+	apis: RUNTIME_API_VERSIONS,
+};
+
+pub const MILLISECS_PER_BLOCK: u64 = 6000;
+
+pub const SLOT_DURATION: u64 = MILLISECS_PER_BLOCK;
+
+// These time units are defined in number of blocks.
+pub const MINUTES: BlockNumber = 60_000 / (MILLISECS_PER_BLOCK as BlockNumber);
+pub const HOURS: BlockNumber = MINUTES * 60;
+pub const DAYS: BlockNumber = HOURS * 24;
+
+/// The version information used to identify this runtime when compiled natively.
+#[cfg(feature = "std")]
+pub fn native_version() -> NativeVersion {
+	NativeVersion {
+		runtime_version: VERSION,
+		can_author_with: Default::default(),
+	}
+}
+
+parameter_types! {
+	pub const BlockHashCount: BlockNumber = 250;
+	pub const MaximumBlockWeight: Weight = 1_000_000;
+	pub const AvailableBlockRatio: Perbill = Perbill::from_percent(75);
+	pub const MaximumBlockLength: u32 = 5 * 1024 * 1024;
+	pub const Version: RuntimeVersion = VERSION;
+}
+
+impl frame_system::Trait for Runtime {
+	/// The identifier used to distinguish between accounts.
+	type AccountId = AccountId;
+	/// The aggregated dispatch type that is available for extrinsics.
+	type Call = Call;
+	/// The lookup mechanism to get account ID from whatever is passed in dispatchers.
+	type Lookup = IdentityLookup<AccountId>;
+	/// The index type for storing how many extrinsics an account has signed.
+	type Index = Index;
+	/// The index type for blocks.
+	type BlockNumber = BlockNumber;
+	/// The type for hashing blocks and tries.
+	type Hash = Hash;
+	/// The hashing algorithm used.
+	type Hashing = BlakeTwo256;
+	/// The header type.
+	type Header = generic::Header<BlockNumber, BlakeTwo256>;
+	/// The ubiquitous event type.
+	type Event = Event;
+	/// The ubiquitous origin type.
+	type Origin = Origin;
+	/// Maximum number of block number to block hash mappings to keep (oldest pruned first).
+	type BlockHashCount = BlockHashCount;
+	/// Maximum weight of each block.
+	type MaximumBlockWeight = MaximumBlockWeight;
+	/// Maximum size of all encoded transactions (in bytes) that are allowed in one block.
+	type MaximumBlockLength = MaximumBlockLength;
+	/// Portion of the block weight that is available to all normal transactions.
+	type AvailableBlockRatio = AvailableBlockRatio;
+	/// Version of the runtime.
+	type Version = Version;
+	/// Converts a module to the index of the module in `construct_runtime!`.
+	///
+	/// This type is being generated by `construct_runtime!`.
+	type ModuleToIndex = ModuleToIndex;
+	/// What to do if a new account is created.
+	type OnNewAccount = ();
+	/// What to do if an account is fully reaped from the system.
+	type OnKilledAccount = ();
+	/// The data to be stored in an account.
+	type AccountData = pallet_balances::AccountData<Balance>;
+}
+
+impl pallet_aura::Trait for Runtime {
+	type AuthorityId = AuraId;
+}
+
+impl pallet_grandpa::Trait for Runtime {
+	type Event = Event;
+}
+
+parameter_types! {
+	pub const MinimumPeriod: u64 = SLOT_DURATION / 2;
+}
+
+impl pallet_timestamp::Trait for Runtime {
+	/// A timestamp: milliseconds since the unix epoch.
+	type Moment = u64;
+	type OnTimestampSet = Aura;
+	type MinimumPeriod = MinimumPeriod;
+}
+
+parameter_types! {
+	pub const ExistentialDeposit: u128 = 500;
+}
+
+impl pallet_balances::Trait for Runtime {
+	/// The type for recording an account's balance.
+	type Balance = Balance;
+	/// The ubiquitous event type.
+	type Event = Event;
+	type DustRemoval = ();
+	type ExistentialDeposit = ExistentialDeposit;
+	type AccountStore = System;
+}
+
+parameter_types! {
+	pub const TransactionBaseFee: Balance = 0;
+	pub const TransactionByteFee: Balance = 1;
+}
+
+impl pallet_transaction_payment::Trait for Runtime {
+	type Currency = pallet_balances::Module<Runtime>;
+	type OnTransactionPayment = ();
+	type TransactionBaseFee = TransactionBaseFee;
+	type TransactionByteFee = TransactionByteFee;
+	type WeightToFee = ConvertInto;
+	type FeeMultiplierUpdate = ();
+}
+
+impl pallet_sudo::Trait for Runtime {
+	type Event = Event;
+	type Call = Call;
+}
+
+construct_runtime!(
+	pub enum Runtime where
+		Block = Block,
+		NodeBlock = opaque::Block,
+		UncheckedExtrinsic = UncheckedExtrinsic
+	{
+		System: frame_system::{Module, Call, Config, Storage, Event<T>},
+		RandomnessCollectiveFlip: pallet_randomness_collective_flip::{Module, Call, Storage},
+		Timestamp: pallet_timestamp::{Module, Call, Storage, Inherent},
+		Aura: pallet_aura::{Module, Config<T>, Inherent(Timestamp)},
+		Grandpa: pallet_grandpa::{Module, Call, Storage, Config, Event},
+		Balances: pallet_balances::{Module, Call, Storage, Config<T>, Event<T>},
+		TransactionPayment: pallet_transaction_payment::{Module, Storage},
+		Sudo: pallet_sudo::{Module, Call, Config<T>, Storage, Event<T>},
+	}
+);
+
+/// The address format for describing accounts.
+pub type Address = AccountId;
+/// Block header type as expected by this runtime.
+pub type Header = generic::Header<BlockNumber, BlakeTwo256>;
+/// Block type as expected by this runtime.
+pub type Block = generic::Block<Header, UncheckedExtrinsic>;
+/// A Block signed with a Justification
+pub type SignedBlock = generic::SignedBlock<Block>;
+/// BlockId type as expected by this runtime.
+pub type BlockId = generic::BlockId<Block>;
+/// The SignedExtension to the basic transaction logic.
+pub type SignedExtra = (
+	frame_system::CheckVersion<Runtime>,
+	frame_system::CheckGenesis<Runtime>,
+	frame_system::CheckEra<Runtime>,
+	frame_system::CheckNonce<Runtime>,
+	frame_system::CheckWeight<Runtime>,
+	pallet_transaction_payment::ChargeTransactionPayment<Runtime>
+);
+/// Unchecked extrinsic type as expected by this runtime.
+pub type UncheckedExtrinsic = generic::UncheckedExtrinsic<Address, Call, Signature, SignedExtra>;
+/// Extrinsic type that has already been checked.
+pub type CheckedExtrinsic = generic::CheckedExtrinsic<AccountId, Call, SignedExtra>;
+/// Executive: handles dispatch to the various modules.
+pub type Executive = frame_executive::Executive<Runtime, Block, frame_system::ChainContext<Runtime>, Runtime, AllModules>;
+
+impl_runtime_apis! {
+	impl sp_api::Core<Block> for Runtime {
+		fn version() -> RuntimeVersion {
+			VERSION
+		}
+
+		fn execute_block(block: Block) {
+			Executive::execute_block(block)
+		}
+
+		fn initialize_block(header: &<Block as BlockT>::Header) {
+			Executive::initialize_block(header)
+		}
+	}
+
+	impl sp_api::Metadata<Block> for Runtime {
+		fn metadata() -> OpaqueMetadata {
+			Runtime::metadata().into()
+		}
+	}
+
+	impl sp_block_builder::BlockBuilder<Block> for Runtime {
+		fn apply_extrinsic(extrinsic: <Block as BlockT>::Extrinsic) -> ApplyExtrinsicResult {
+			Executive::apply_extrinsic(extrinsic)
+		}
+
+		fn apply_trusted_extrinsic(extrinsic: <Block as BlockT>::Extrinsic) -> ApplyExtrinsicResult {
+			Executive::apply_trusted_extrinsic(extrinsic)
+		}
+
+		fn finalize_block() -> <Block as BlockT>::Header {
+			Executive::finalize_block()
+		}
+
+		fn inherent_extrinsics(data: sp_inherents::InherentData) -> Vec<<Block as BlockT>::Extrinsic> {
+			data.create_extrinsics()
+		}
+
+		fn check_inherents(
+			block: Block,
+			data: sp_inherents::InherentData,
+		) -> sp_inherents::CheckInherentsResult {
+			data.check_extrinsics(&block)
+		}
+
+		fn random_seed() -> <Block as BlockT>::Hash {
+			RandomnessCollectiveFlip::random_seed()
+		}
+	}
+
+	impl sp_transaction_pool::runtime_api::TaggedTransactionQueue<Block> for Runtime {
+		fn validate_transaction(tx: <Block as BlockT>::Extrinsic) -> TransactionValidity {
+			Executive::validate_transaction(tx)
+		}
+	}
+
+	impl sp_offchain::OffchainWorkerApi<Block> for Runtime {
+		fn offchain_worker(header: &<Block as BlockT>::Header) {
+			Executive::offchain_worker(header)
+		}
+	}
+
+	impl sp_consensus_aura::AuraApi<Block, AuraId> for Runtime {
+		fn slot_duration() -> u64 {
+			Aura::slot_duration()
+		}
+
+		fn authorities() -> Vec<AuraId> {
+			Aura::authorities()
+		}
+	}
+
+	impl sp_session::SessionKeys<Block> for Runtime {
+		fn generate_session_keys(seed: Option<Vec<u8>>) -> Vec<u8> {
+			opaque::SessionKeys::generate(seed)
+		}
+
+		fn decode_session_keys(
+			encoded: Vec<u8>,
+		) -> Option<Vec<(Vec<u8>, sp_core::crypto::KeyTypeId)>> {
+			opaque::SessionKeys::decode_into_raw_public_keys(&encoded)
+		}
+	}
+
+	impl fg_primitives::GrandpaApi<Block> for Runtime {
+		fn grandpa_authorities() -> GrandpaAuthorityList {
+			Grandpa::grandpa_authorities()
+		}
+	}
+}

bridges/bin/node/scripts/init.sh

+#!/usr/bin/env bash
+
+set -e
+
+echo "*** Initializing WASM build environment"
+
+if [ -z $CI_PROJECT_NAME ] ; then
+   rustup update nightly
+   rustup update stable
+fi
+
+rustup target add wasm32-unknown-unknown --toolchain nightly

bridges/modules/ethereum/Cargo.toml

@@ -12,29 +12,34 @@ primitives = { package = "sp-bridge-eth-poa", path = "../../primitives/ethereum-
 
 # Substrate Based Dependencies
 [dependencies.frame-support]
-version = "2.0.0"
-git = "https://github.com/paritytech/substrate.git"
+version = "2.0.0-alpha.2"
 default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
 
 [dependencies.frame-system]
-version = "2.0.0"
-git = "https://github.com/paritytech/substrate.git"
+version = "2.0.0-alpha.2"
 default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
 
 [dependencies.sp-std]
-version = "2.0.0"
-git = "https://github.com/paritytech/substrate.git"
+version = "2.0.0-alpha.2"
 default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
 
 [dependencies.sp-io]
-version = "2.0.0"
-git = "https://github.com/paritytech/substrate.git"
+version = "2.0.0-alpha.2"
 default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
 
 [dependencies.sp-runtime]
-version = "2.0.0"
-git = "https://github.com/paritytech/substrate.git"
+version = "2.0.0-alpha.2"
 default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
 
 # Dev Dependencies
 [dev-dependencies]

bridges/modules/substrate/Cargo.toml

@@ -9,56 +9,63 @@ edition = "2018"
 [dependencies]
 codec = { package = "parity-scale-codec", version = "1.0.0", default-features = false }
 serde = { version = "1.0", optional = true }
+hash-db = { version = "0.15.2", default-features = false }
 
 # Substrate Based Dependencies
 [dependencies.frame-support]
-version = "2.0.0"
-git = "https://github.com/paritytech/substrate.git"
+version = "2.0.0-alpha.2"
 default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
 
 [dependencies.frame-system]
-version = "2.0.0"
-git = "https://github.com/paritytech/substrate.git"
+version = "2.0.0-alpha.2"
 default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
 
-[dependencies.hash-db]
-version = "0.15.2"
-default-features = false
 
 [dependencies.pallet-session]
-version = "2.0.0"
-git = "https://github.com/paritytech/substrate.git"
+version = "2.0.0-alpha.2"
 default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
 
 [dependencies.sp-core]
-version = "2.0.0"
-git = "https://github.com/paritytech/substrate.git"
+version = "2.0.0-alpha.2"
 default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
 
 [dependencies.sp-finality-grandpa]
-version = "2.0.0"
-git = "https://github.com/paritytech/substrate.git"
+version = "2.0.0-alpha.2"
 default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
 
 [dependencies.sp-runtime]
-version = "2.0.0"
-git = "https://github.com/paritytech/substrate.git"
+version = "2.0.0-alpha.2"
 default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
 
 [dependencies.sp-trie]
-version = "2.0.0"
-git = "https://github.com/paritytech/substrate.git"
+version = "2.0.0-alpha.2"
 default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
 
 # Dev Dependencies
 [dev-dependencies.sp-io]
-version = "2.0.0"
-git = "https://github.com/paritytech/substrate.git"
+version = "2.0.0-alpha.2"
 default-features = false
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
 
 [dev-dependencies.sp-state-machine]
-version = "0.8.0"
-git = "https://github.com/paritytech/substrate.git"
+version = "0.8.0-alpha.2"
+rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31"
+git = "https://github.com/paritytech/substrate/"
 
 [features]
 default = ["std"]

bridges/modules/substrate/src/lib.rs

@@ -249,7 +249,7 @@ mod tests {
 		type ModuleToIndex = ();
 		type AccountData = ();
 		type OnNewAccount = ();
-		type OnReapAccount = ();
+		type OnKilledAccount = ();
 	}
 
 	impl Trait for Test {}

bridges/primitives/ethereum-poa/Cargo.toml

@@ -16,10 +16,12 @@ impl-rlp = { version = "0.2", default-features = false }
 impl-serde = { version = "0.2.3", optional = true }
 codec = { package = "parity-scale-codec", version = "1.0.0", default-features = false }
 rlp = { version = "0.4", default-features = false }
-sp-std = { version = "2.0.0", git = "https://github.com/paritytech/substrate.git", default-features = false }
-sp-runtime = { version = "2.0.0", git = "https://github.com/paritytech/substrate.git", default-features = false }
-sp-api = { version = "2.0.0", git = "https://github.com/paritytech/substrate.git", default-features = false }
-sp-io = { version = "2.0.0", git = "https://github.com/paritytech/substrate.git", default-features = false }
+
+sp-std = { version = "2.0.0-alpha.2", git = "https://github.com/paritytech/substrate.git", default-features = false, rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31" }
+sp-runtime = { version = "2.0.0-alpha.2", git = "https://github.com/paritytech/substrate.git", default-features = false, rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31" }
+sp-api = { version = "2.0.0-alpha.2", git = "https://github.com/paritytech/substrate.git", default-features = false, rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31" }
+sp-io = { version = "2.0.0-alpha.2", git = "https://github.com/paritytech/substrate.git", default-features = false, rev = "2afecf81ee19b8a6edb364b419190ea47c4a4a31" }
+
 hash-db = { version = "0.15.2", default-features = false }
 triehash = { version = "0.8.2", default-features = false }
 plain_hasher = { version = "0.2.2", default-features = false }