chain_spec.rs

use chocolate_node_constants::currency::HECTOCHOC;
use chocolate_projects::{Reason, Status};
use chocolate_runtime::{
	AccountId, AuraConfig, Balance, BalancesConfig, ChocolateModuleConfig, CouncilConfig,
	ElectionsConfig, GenesisConfig, GrandpaConfig, Signature, SudoConfig, SystemConfig,
	WASM_BINARY,
};
use sc_service::{ChainType, Properties};
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};

// The URL for the telemetry server.
// const STAGING_TELEMETRY_URL: &str = "wss://telemetry.polkadot.io/submit/";

/// Specialized `ChainSpec`. This is a specialization of the general Substrate ChainSpec type.
pub type ChainSpec = sc_service::GenericChainSpec<GenesisConfig>;

/// 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;

/// 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()
}

/// Generate an Aura authority key.
pub fn authority_keys_from_seed(s: &str) -> (AuraId, GrandpaId) {
	(get_from_seed::<AuraId>(s), get_from_seed::<GrandpaId>(s))
}

// Generate Chain Properties for $CHOC token
// Decimals -> 1 Balance unit = 10^-{Decimals}CHOC.
// Taking example of this Instance -> 1 Balance unit = 10^-12 CHOC.
pub fn chain_properties() -> Properties {
	let mut properties = Properties::new();
	properties.insert("tokenDecimals".into(), 12.into());
	properties.insert("tokenSymbol".into(), "CHOC".into());
	properties.insert("ss58Format".into(), 64.into());
	properties
}

pub fn development_config() -> Result<ChainSpec, String> {
	let wasm_binary = WASM_BINARY.ok_or_else(|| "Development wasm not available".to_string())?;

	Ok(ChainSpec::from_genesis(
		// Name
		"Chocolate DevNet",
		// ID
		"dev",
		ChainType::Development,
		move || {
			testnet_genesis(
				wasm_binary,
				// Initial PoA authorities
				vec![authority_keys_from_seed("Alice")],
				// Sudo account
				get_account_id_from_seed::<sr25519::Public>("Alice"),
				// Pre-funded accounts
				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,
			)
		},
		// Bootnodes
		vec![],
		// Telemetry
		None,
		// Protocol ID
		None,
		// Properties
		Some(chain_properties()),
		// Extensions
		None,
	))
}

pub fn local_testnet_config() -> Result<ChainSpec, String> {
	let wasm_binary = WASM_BINARY.ok_or_else(|| "Development wasm not available".to_string())?;

	Ok(ChainSpec::from_genesis(
		// Name
		"Local Testnet",
		// ID
		"local_testnet",
		ChainType::Local,
		move || {
			testnet_genesis(
				wasm_binary,
				// Initial PoA authorities
				vec![authority_keys_from_seed("Alice"), authority_keys_from_seed("Bob")],
				// Sudo account
				get_account_id_from_seed::<sr25519::Public>("Alice"),
				// Pre-funded accounts
				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,
			)
		},
		// Bootnodes
		vec![],
		// Telemetry
		None,
		// Protocol ID
		None,
		// Properties
		Some(chain_properties()),
		// Extensions
		None,
	))
}

/// Configure initial storage state for FRAME modules.  
/// The object modified here in GenesisConfig maps to the one in lib.rs
/// where you specified pallets in camelcase. The type definitions ending in Config match what is used - This fnx is called as genesis for test
fn testnet_genesis(
	wasm_binary: &[u8],
	initial_authorities: Vec<(AuraId, GrandpaId)>,
	root_key: AccountId,
	endowed_accounts: Vec<AccountId>,
	_enable_println: bool,
) -> GenesisConfig {
	let num_endowed_accounts = endowed_accounts.len();

	const ENDOWMENT: Balance = 10_000_000 * HECTOCHOC;
	const STASH: Balance = ENDOWMENT / 1000;
	GenesisConfig {
		system: SystemConfig {
			// Add Wasm runtime to storage.
			code: wasm_binary.to_vec(),
			changes_trie_config: Default::default(),
		},
		balances: BalancesConfig {
			// Configure endowed accounts with initial balance of ENDOWMENT.
			balances: endowed_accounts.iter().cloned().map(|k| (k, ENDOWMENT)).collect(),
		},
		elections: ElectionsConfig {
			// configure all members to have an initial 'stash' backing, or elect them
			// - These map to our default members of Council Collective - If not changed, council remains constant for n period
			// Elect only half endowed accounts initially - Alice and Bob  - Backed with 1M each - Based on 12 Decimal choc.
			members: endowed_accounts
				.iter()
				.take((num_endowed_accounts + 1) / 2)
				.cloned()
				.map(|member| (member, STASH))
				.collect(),
		},
		council: CouncilConfig::default(),
		treasury: Default::default(),
		aura: AuraConfig {
			authorities: initial_authorities.iter().map(|x| (x.0.clone())).collect(),
		},
		grandpa: GrandpaConfig {
			authorities: initial_authorities.iter().map(|x| (x.1.clone(), 1)).collect(),
		},
		sudo: SudoConfig {
			// Assign network admin rights.
			key: root_key,
		},
		// this isn't dynamic as we do not know the data passed.
		chocolate_module: ChocolateModuleConfig {
			init_projects: {
				let ps_req = Reason::PassedRequirements;
				// use a static list for accounts
				vec![
					(Status::Accepted, ps_req.clone()),
					(Status::Rejected, Reason::Malicious),
					(Status::Accepted, ps_req.clone()),
					(Status::Accepted, ps_req.clone()),
					(Status::Proposed, ps_req.clone()),
					(Status::Accepted, ps_req.clone()),
					(Status::Accepted, ps_req.clone()),
					(Status::Accepted, ps_req.clone()),
				]
			},
			init_users: {
				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"),
				]
			},
		},
	}
}