pezkuwi-subxt/bridges/bin/millau/node/src/chain_spec.rs

// Copyright 2019-2020 Parity Technologies (UK) Ltd.
// This file is part of Parity Bridges Common.

// Parity Bridges Common 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.

// Parity Bridges Common 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 Parity Bridges Common.  If not, see <http://www.gnu.org/licenses/>.

use millau_runtime::{
	AccountId, AuraConfig, BalancesConfig, BridgeRialtoConfig, GenesisConfig, GrandpaConfig, SessionConfig,
	SessionKeys, Signature, SudoConfig, SystemConfig, WASM_BINARY,
};
use sp_consensus_aura::sr25519::AuthorityId as AuraId;
use sp_core::{sr25519, Pair, Public};
use sp_finality_grandpa::AuthorityId as GrandpaId;
use sp_runtime::traits::{IdentifyAccount, Verify};

/// Specialized `ChainSpec`. This is a specialization of the general Substrate ChainSpec type.
pub type ChainSpec = sc_service::GenericChainSpec<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,
	/// Whatever the current runtime is, with simple Alice/Bob/Charlie/Dave/Eve auths.
	LocalTestnet,
}

/// 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) -> (AccountId, AuraId, GrandpaId) {
	(
		get_account_id_from_seed::<sr25519::Public>(s),
		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",
				sc_service::ChainType::Development,
				|| {
					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,
			),
			Alternative::LocalTestnet => ChainSpec::from_genesis(
				"Local Testnet",
				"local_testnet",
				sc_service::ChainType::Local,
				|| {
					testnet_genesis(
						vec![
							get_authority_keys_from_seed("Alice"),
							get_authority_keys_from_seed("Bob"),
							get_authority_keys_from_seed("Charlie"),
							get_authority_keys_from_seed("Dave"),
							get_authority_keys_from_seed("Eve"),
						],
						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>("Charlie"),
							get_account_id_from_seed::<sr25519::Public>("Dave"),
							get_account_id_from_seed::<sr25519::Public>("Eve"),
							get_account_id_from_seed::<sr25519::Public>("Ferdie"),
							get_account_id_from_seed::<sr25519::Public>("Alice//stash"),
							get_account_id_from_seed::<sr25519::Public>("Bob//stash"),
							get_account_id_from_seed::<sr25519::Public>("Charlie//stash"),
							get_account_id_from_seed::<sr25519::Public>("Dave//stash"),
							get_account_id_from_seed::<sr25519::Public>("Eve//stash"),
							get_account_id_from_seed::<sr25519::Public>("Ferdie//stash"),
						],
						true,
					)
				},
				vec![],
				None,
				None,
				None,
				None,
			),
		})
	}
}

fn session_keys(aura: AuraId, grandpa: GrandpaId) -> SessionKeys {
	SessionKeys { aura, grandpa }
}

fn testnet_genesis(
	initial_authorities: Vec<(AccountId, 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: Vec::new(),
		}),
		pallet_grandpa: Some(GrandpaConfig {
			authorities: Vec::new(),
		}),
		pallet_substrate_bridge: load_rialto_bridge_config(),
		pallet_sudo: Some(SudoConfig { key: root_key }),
		pallet_session: Some(SessionConfig {
			keys: initial_authorities
				.iter()
				.map(|x| (x.0.clone(), x.0.clone(), session_keys(x.1.clone(), x.2.clone())))
				.collect::<Vec<_>>(),
		}),
	}
}

fn load_rialto_bridge_config() -> Option<BridgeRialtoConfig> {
	Some(BridgeRialtoConfig {
		initial_header: Some(millau_runtime::rialto::initial_header()),
		initial_authority_list: millau_runtime::rialto::initial_authority_set().authorities,
		initial_set_id: millau_runtime::rialto::initial_authority_set().set_id,
		first_scheduled_change: None,
	})
}