lib.rs

// Copyright 2019 Parity Technologies (UK) Ltd.
// This file is part of Cumulus.

// Cumulus 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.

// Cumulus 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 Cumulus.  If not, see <http://www.gnu.org/licenses/>.

#![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 rococo_parachain_primitives::*;
use sp_api::impl_runtime_apis;
use sp_core::OpaqueMetadata;
use sp_runtime::{
	create_runtime_str, generic, impl_opaque_keys,
	traits::{BlakeTwo256, Block as BlockT, IdentityLookup},
	transaction_validity::{TransactionSource, TransactionValidity},
	ApplyExtrinsicResult,
};
use sp_std::prelude::*;
#[cfg(feature = "std")]
use sp_version::NativeVersion;
use sp_version::RuntimeVersion;

// A few exports that help ease life for downstream crates.
pub use frame_support::{
	construct_runtime, parameter_types,
	traits::Randomness,
	weights::{
		constants::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight, WEIGHT_PER_SECOND},
		DispatchClass, IdentityFee, Weight,
	},
	StorageValue,
};
use frame_system::limits::{BlockLength, BlockWeights};
pub use pallet_balances::Call as BalancesCall;
pub use pallet_timestamp::Call as TimestampCall;
#[cfg(any(feature = "std", test))]
pub use sp_runtime::BuildStorage;
pub use sp_runtime::{Perbill, Permill};

// XCM imports
use polkadot_parachain::primitives::Sibling;
use xcm::v0::{Junction, MultiLocation, NetworkId};
use xcm_builder::{
	AccountId32Aliases, CurrencyAdapter, LocationInverter, ParentIsDefault, RelayChainAsNative,
	SiblingParachainAsNative, SiblingParachainConvertsVia, SignedAccountId32AsNative,
	SovereignSignedViaLocation,
};
use xcm_executor::{
	traits::{IsConcrete, NativeAsset},
	Config, XcmExecutor,
};

pub type SessionHandlers = ();

impl_opaque_keys! {
	pub struct SessionKeys {}
}

/// This runtime version.
pub const VERSION: RuntimeVersion = RuntimeVersion {
	spec_name: create_runtime_str!("cumulus-test-parachain"),
	impl_name: create_runtime_str!("cumulus-test-parachain"),
	authoring_version: 1,
	spec_version: 3,
	impl_version: 1,
	apis: RUNTIME_API_VERSIONS,
	transaction_version: 1,
};

pub const MILLISECS_PER_BLOCK: u64 = 6000;

pub const SLOT_DURATION: u64 = MILLISECS_PER_BLOCK;

pub const EPOCH_DURATION_IN_BLOCKS: u32 = 10 * MINUTES;

// 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;

// 1 in 4 blocks (on average, not counting collisions) will be primary babe blocks.
pub const PRIMARY_PROBABILITY: (u64, u64) = (1, 4);

#[derive(codec::Encode, codec::Decode)]
pub enum XCMPMessage<XAccountId, XBalance> {
	/// Transfer tokens to the given account from the Parachain account.
	TransferToken(XAccountId, XBalance),
}

/// 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(),
	}
}

/// We assume that ~10% of the block weight is consumed by `on_initalize` handlers.
/// This is used to limit the maximal weight of a single extrinsic.
const AVERAGE_ON_INITIALIZE_RATIO: Perbill = Perbill::from_percent(10);
/// We allow `Normal` extrinsics to fill up the block up to 75%, the rest can be used
/// by  Operational  extrinsics.
const NORMAL_DISPATCH_RATIO: Perbill = Perbill::from_percent(75);
/// We allow for 2 seconds of compute with a 6 second average block time.
const MAXIMUM_BLOCK_WEIGHT: Weight = 2 * WEIGHT_PER_SECOND;

parameter_types! {
	pub const BlockHashCount: BlockNumber = 250;
	pub const Version: RuntimeVersion = VERSION;
	pub RuntimeBlockLength: BlockLength =
		BlockLength::max_with_normal_ratio(5 * 1024 * 1024, NORMAL_DISPATCH_RATIO);
	pub RuntimeBlockWeights: BlockWeights = BlockWeights::builder()
		.base_block(BlockExecutionWeight::get())
		.for_class(DispatchClass::all(), |weights| {
			weights.base_extrinsic = ExtrinsicBaseWeight::get();
		})
		.for_class(DispatchClass::Normal, |weights| {
			weights.max_total = Some(NORMAL_DISPATCH_RATIO * MAXIMUM_BLOCK_WEIGHT);
		})
		.for_class(DispatchClass::Operational, |weights| {
			weights.max_total = Some(MAXIMUM_BLOCK_WEIGHT);
			// Operational transactions have some extra reserved space, so that they
			// are included even if block reached `MAXIMUM_BLOCK_WEIGHT`.
			weights.reserved = Some(
				MAXIMUM_BLOCK_WEIGHT - NORMAL_DISPATCH_RATIO * MAXIMUM_BLOCK_WEIGHT
			);
		})
		.avg_block_initialization(AVERAGE_ON_INITIALIZE_RATIO)
		.build_or_panic();
	pub const SS58Prefix: u8 = 42;
}

impl frame_system::Config 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;
	/// Runtime version.
	type Version = Version;
	/// Converts a module to an index of this module in the runtime.
	type PalletInfo = PalletInfo;
	type AccountData = pallet_balances::AccountData<Balance>;
	type OnNewAccount = ();
	type OnKilledAccount = ();
	type DbWeight = ();
	type BaseCallFilter = ();
	type SystemWeightInfo = ();
	type BlockWeights = RuntimeBlockWeights;
	type BlockLength = RuntimeBlockLength;
	type SS58Prefix = SS58Prefix;
}

parameter_types! {
	pub const MinimumPeriod: u64 = SLOT_DURATION / 2;
}

impl pallet_timestamp::Config for Runtime {
	/// A timestamp: milliseconds since the unix epoch.
	type Moment = u64;
	type OnTimestampSet = ();
	type MinimumPeriod = MinimumPeriod;
	type WeightInfo = ();
}

parameter_types! {
	pub const ExistentialDeposit: u128 = 500;
	pub const TransferFee: u128 = 0;
	pub const CreationFee: u128 = 0;
	pub const TransactionByteFee: u128 = 1;
	pub const MaxLocks: u32 = 50;
}

impl pallet_balances::Config 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;
	type WeightInfo = ();
	type MaxLocks = MaxLocks;
}

impl pallet_transaction_payment::Config for Runtime {
	type OnChargeTransaction = pallet_transaction_payment::CurrencyAdapter<Balances, ()>;
	type TransactionByteFee = TransactionByteFee;
	type WeightToFee = IdentityFee<Balance>;
	type FeeMultiplierUpdate = ();
}

impl pallet_sudo::Config for Runtime {
	type Call = Call;
	type Event = Event;
}

impl cumulus_parachain_system::Config for Runtime {
	type Event = Event;
	type OnValidationData = ();
	type SelfParaId = parachain_info::Module<Runtime>;
	type DownwardMessageHandlers = ();
	type HrmpMessageHandlers = ();
}

impl parachain_info::Config for Runtime {}

parameter_types! {
	pub const RococoLocation: MultiLocation = MultiLocation::X1(Junction::Parent);
	pub const RococoNetwork: NetworkId = NetworkId::Polkadot;
	pub RelayChainOrigin: Origin = xcm_handler::Origin::Relay.into();
	pub Ancestry: MultiLocation = Junction::Parachain {
		id: ParachainInfo::parachain_id().into()
	}.into();
}

type LocationConverter = (
	ParentIsDefault<AccountId>,
	SiblingParachainConvertsVia<Sibling, AccountId>,
	AccountId32Aliases<RococoNetwork, AccountId>,
);

type LocalAssetTransactor = CurrencyAdapter<
	// Use this currency:
	Balances,
	// Use this currency when it is a fungible asset matching the given location or name:
	IsConcrete<RococoLocation>,
	// Do a simple punn to convert an AccountId32 MultiLocation into a native chain account ID:
	LocationConverter,
	// Our chain's account ID type (we can't get away without mentioning it explicitly):
	AccountId,
>;

type LocalOriginConverter = (
	SovereignSignedViaLocation<LocationConverter, Origin>,
	RelayChainAsNative<RelayChainOrigin, Origin>,
	SiblingParachainAsNative<xcm_handler::Origin, Origin>,
	SignedAccountId32AsNative<RococoNetwork, Origin>,
);

pub struct XcmConfig;
impl Config for XcmConfig {
	type Call = Call;
	type XcmSender = XcmHandler;
	// How to withdraw and deposit an asset.
	type AssetTransactor = LocalAssetTransactor;
	type OriginConverter = LocalOriginConverter;
	type IsReserve = NativeAsset;
	type IsTeleporter = ();
	type LocationInverter = LocationInverter<Ancestry>;
}

impl xcm_handler::Config for Runtime {
	type Event = Event;
	type XcmExecutor = XcmExecutor<XcmConfig>;
	type UpwardMessageSender = ParachainSystem;
	type HrmpMessageSender = ParachainSystem;
}

construct_runtime! {
	pub enum Runtime where
		Block = Block,
		NodeBlock = rococo_parachain_primitives::Block,
		UncheckedExtrinsic = UncheckedExtrinsic,
	{
		System: frame_system::{Module, Call, Storage, Config, Event<T>},
		Timestamp: pallet_timestamp::{Module, Call, Storage, Inherent},
		Balances: pallet_balances::{Module, Call, Storage, Config<T>, Event<T>},
		Sudo: pallet_sudo::{Module, Call, Storage, Config<T>, Event<T>},
		RandomnessCollectiveFlip: pallet_randomness_collective_flip::{Module, Call, Storage},
		ParachainSystem: cumulus_parachain_system::{Module, Call, Storage, Inherent, Event},
		TransactionPayment: pallet_transaction_payment::{Module, Storage},
		ParachainInfo: parachain_info::{Module, Storage, Config},
		XcmHandler: xcm_handler::{Module, Event<T>, Origin},
	}
}

/// 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::CheckSpecVersion<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 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(
			source: TransactionSource,
			tx: <Block as BlockT>::Extrinsic,
		) -> TransactionValidity {
			Executive::validate_transaction(source, tx)
		}
	}

	impl sp_offchain::OffchainWorkerApi<Block> for Runtime {
		fn offchain_worker(header: &<Block as BlockT>::Header) {
			Executive::offchain_worker(header)
		}
	}

	impl sp_session::SessionKeys<Block> for Runtime {
		fn decode_session_keys(
			encoded: Vec<u8>,
		) -> Option<Vec<(Vec<u8>, sp_core::crypto::KeyTypeId)>> {
			SessionKeys::decode_into_raw_public_keys(&encoded)
		}

		fn generate_session_keys(seed: Option<Vec<u8>>) -> Vec<u8> {
			SessionKeys::generate(seed)
		}
	}
}

cumulus_runtime::register_validate_block!(Block, Executive);