lib.rs

// Copyright 2020 Parity Technologies (UK) Ltd.
// This file is part of Polkadot.

// Polkadot 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.

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

//! The Rococo runtime for v1 parachains.

#![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"]

use authority_discovery_primitives::AuthorityId as AuthorityDiscoveryId;
use beefy_primitives::{crypto::AuthorityId as BeefyId, mmr::MmrLeafVersion};
use frame_support::{
	construct_runtime, parameter_types,
	traits::{All, Filter, IsInVec, KeyOwnerProofSystem, OnRuntimeUpgrade, Randomness},
	weights::Weight,
	PalletId,
};
use frame_system::EnsureRoot;
use pallet_grandpa::{fg_primitives, AuthorityId as GrandpaId};
use pallet_im_online::sr25519::AuthorityId as ImOnlineId;
use pallet_mmr_primitives as mmr;
use pallet_session::historical as session_historical;
use pallet_transaction_payment::{CurrencyAdapter, FeeDetails, RuntimeDispatchInfo};
use parity_scale_codec::{Decode, Encode, MaxEncodedLen};
use primitives::v1::{
	AccountId, AccountIndex, Balance, BlockNumber, CandidateEvent, CommittedCandidateReceipt,
	CoreState, GroupRotationInfo, Hash, Id, InboundDownwardMessage, InboundHrmpMessage, Moment,
	Nonce, OccupiedCoreAssumption, PersistedValidationData, SessionInfo as SessionInfoData,
	Signature, ValidationCode, ValidationCodeHash, ValidatorId, ValidatorIndex,
};
use runtime_common::{
	auctions, crowdloan, impls::ToAuthor, paras_registrar, paras_sudo_wrapper, slots, xcm_sender,
	BlockHashCount, BlockLength, BlockWeights, RocksDbWeight, SlowAdjustingFeeUpdate,
};
use runtime_parachains::{self, runtime_api_impl::v1 as runtime_api_impl};
use sp_core::{OpaqueMetadata, RuntimeDebug};
use sp_runtime::{
	create_runtime_str, generic, impl_opaque_keys,
	traits::{
		self, AccountIdLookup, BlakeTwo256, Block as BlockT, Extrinsic as ExtrinsicT, Keccak256,
		OpaqueKeys, SaturatedConversion, Verify,
	},
	transaction_validity::{TransactionPriority, TransactionSource, TransactionValidity},
	ApplyExtrinsicResult, KeyTypeId, Perbill,
};
use sp_staking::SessionIndex;
use sp_std::{collections::btree_map::BTreeMap, prelude::*};
#[cfg(any(feature = "std", test))]
use sp_version::NativeVersion;
use sp_version::RuntimeVersion;

use runtime_parachains::{
	configuration as parachains_configuration, dmp as parachains_dmp, hrmp as parachains_hrmp,
	inclusion as parachains_inclusion, initializer as parachains_initializer,
	origin as parachains_origin, paras as parachains_paras,
	paras_inherent as parachains_paras_inherent, scheduler as parachains_scheduler,
	session_info as parachains_session_info, shared as parachains_shared, ump as parachains_ump,
};

use bridge_runtime_common::messages::{
	source::estimate_message_dispatch_and_delivery_fee, MessageBridge,
};

pub use pallet_balances::Call as BalancesCall;

use polkadot_parachain::primitives::Id as ParaId;

use constants::{currency::*, fee::*, time::*};
use frame_support::traits::InstanceFilter;
use xcm::v0::{BodyId, MultiLocation, NetworkId, Xcm};
use xcm_builder::{
	AccountId32Aliases, BackingToPlurality, ChildParachainAsNative, ChildParachainConvertsVia,
	ChildSystemParachainAsSuperuser, CurrencyAdapter as XcmCurrencyAdapter, FixedWeightBounds,
	IsConcrete, LocationInverter, SignedAccountId32AsNative, SignedToAccountId32,
	SovereignSignedViaLocation, UsingComponents,
};
use xcm_executor::XcmExecutor;

mod bridge_messages;
/// Constant values used within the runtime.
pub mod constants;
mod validator_manager;

// Make the WASM binary available.
#[cfg(feature = "std")]
include!(concat!(env!("OUT_DIR"), "/wasm_binary.rs"));

/// Runtime version (Rococo).
pub const VERSION: RuntimeVersion = RuntimeVersion {
	spec_name: create_runtime_str!("rococo"),
	impl_name: create_runtime_str!("parity-rococo-v1.6"),
	authoring_version: 0,
	spec_version: 9004,
	impl_version: 0,
	#[cfg(not(feature = "disable-runtime-api"))]
	apis: RUNTIME_API_VERSIONS,
	#[cfg(feature = "disable-runtime-api")]
	apis: sp_version::create_apis_vec![[]],
	transaction_version: 0,
};

/// The BABE epoch configuration at genesis.
pub const BABE_GENESIS_EPOCH_CONFIG: babe_primitives::BabeEpochConfiguration =
	babe_primitives::BabeEpochConfiguration {
		c: PRIMARY_PROBABILITY,
		allowed_slots: babe_primitives::AllowedSlots::PrimaryAndSecondaryVRFSlots,
	};

/// Native version.
#[cfg(any(feature = "std", test))]
pub fn native_version() -> NativeVersion {
	NativeVersion { runtime_version: VERSION, can_author_with: Default::default() }
}

/// The address format for describing accounts.
pub type Address = sp_runtime::MultiAddress<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::CheckTxVersion<Runtime>,
	frame_system::CheckGenesis<Runtime>,
	frame_system::CheckMortality<Runtime>,
	frame_system::CheckNonce<Runtime>,
	frame_system::CheckWeight<Runtime>,
	pallet_transaction_payment::ChargeTransactionPayment<Runtime>,
);

/// Migrate from `PalletVersion` to the new `StorageVersion`
pub struct MigratePalletVersionToStorageVersion;

impl OnRuntimeUpgrade for MigratePalletVersionToStorageVersion {
	fn on_runtime_upgrade() -> frame_support::weights::Weight {
		frame_support::migrations::migrate_from_pallet_version_to_storage_version::<
			AllPalletsWithSystem,
		>(&RocksDbWeight::get())
	}
}

/// Unchecked extrinsic type as expected by this runtime.
pub type UncheckedExtrinsic = generic::UncheckedExtrinsic<Address, Call, Signature, SignedExtra>;
/// Executive: handles dispatch to the various modules.
pub type Executive = frame_executive::Executive<
	Runtime,
	Block,
	frame_system::ChainContext<Runtime>,
	Runtime,
	AllPallets,
	MigratePalletVersionToStorageVersion,
>;
/// The payload being signed in transactions.
pub type SignedPayload = generic::SignedPayload<Call, SignedExtra>;

impl_opaque_keys! {
	pub struct SessionKeys {
		pub grandpa: Grandpa,
		pub babe: Babe,
		pub im_online: ImOnline,
		pub para_validator: Initializer,
		pub para_assignment: ParaSessionInfo,
		pub authority_discovery: AuthorityDiscovery,
		pub beefy: Beefy,
	}
}

construct_runtime! {
	pub enum Runtime where
		Block = Block,
		NodeBlock = primitives::v1::Block,
		UncheckedExtrinsic = UncheckedExtrinsic
	{
		System: frame_system::{Pallet, Call, Storage, Config, Event<T>},

		// Must be before session.
		Babe: pallet_babe::{Pallet, Call, Storage, Config, ValidateUnsigned},

		Timestamp: pallet_timestamp::{Pallet, Call, Storage, Inherent},
		Indices: pallet_indices::{Pallet, Call, Storage, Config<T>, Event<T>},
		Balances: pallet_balances::{Pallet, Call, Storage, Config<T>, Event<T>},
		TransactionPayment: pallet_transaction_payment::{Pallet, Storage},

		// Consensus support.
		Authorship: pallet_authorship::{Pallet, Call, Storage},
		Offences: pallet_offences::{Pallet, Storage, Event},
		Historical: session_historical::{Pallet},
		Session: pallet_session::{Pallet, Call, Storage, Event, Config<T>},
		Grandpa: pallet_grandpa::{Pallet, Call, Storage, Config, Event, ValidateUnsigned},
		ImOnline: pallet_im_online::{Pallet, Call, Storage, Event<T>, ValidateUnsigned, Config<T>},
		AuthorityDiscovery: pallet_authority_discovery::{Pallet, Config},

		// Parachains modules.
		ParachainsOrigin: parachains_origin::{Pallet, Origin},
		Configuration: parachains_configuration::{Pallet, Call, Storage, Config<T>},
		ParasShared: parachains_shared::{Pallet, Call, Storage},
		ParaInclusion: parachains_inclusion::{Pallet, Call, Storage, Event<T>},
		ParaInherent: parachains_paras_inherent::{Pallet, Call, Storage, Inherent},
		ParaScheduler: parachains_scheduler::{Pallet, Storage},
		Paras: parachains_paras::{Pallet, Call, Storage, Event, Config},
		Initializer: parachains_initializer::{Pallet, Call, Storage},
		Dmp: parachains_dmp::{Pallet, Call, Storage},
		Ump: parachains_ump::{Pallet, Call, Storage, Event},
		Hrmp: parachains_hrmp::{Pallet, Call, Storage, Event<T>, Config},
		ParaSessionInfo: parachains_session_info::{Pallet, Storage},

		// Parachain Onboarding Pallets
		Registrar: paras_registrar::{Pallet, Call, Storage, Event<T>},
		Auctions: auctions::{Pallet, Call, Storage, Event<T>},
		Crowdloan: crowdloan::{Pallet, Call, Storage, Event<T>},
		Slots: slots::{Pallet, Call, Storage, Event<T>},
		ParasSudoWrapper: paras_sudo_wrapper::{Pallet, Call},

		// Sudo
		Sudo: pallet_sudo::{Pallet, Call, Storage, Event<T>, Config<T>},

		// Bridges support.
		Mmr: pallet_mmr::{Pallet, Storage},
		Beefy: pallet_beefy::{Pallet, Config<T>, Storage},
		MmrLeaf: pallet_beefy_mmr::{Pallet, Storage},

		// It might seem strange that we add both sides of the bridge to the same runtime. We do this because this
		// runtime as shared by both the Rococo and Wococo chains. When running as Rococo we only use
		// `BridgeWococoGrandpa`, and vice versa.
		BridgeRococoGrandpa: pallet_bridge_grandpa::{Pallet, Call, Storage, Config<T>} = 40,
		BridgeWococoGrandpa: pallet_bridge_grandpa::<Instance1>::{Pallet, Call, Storage, Config<T>} = 41,

		// Validator Manager pallet.
		ValidatorManager: validator_manager::{Pallet, Call, Storage, Event<T>},

		// Bridge messages support. The same story as with the bridge grandpa pallet above ^^^ - when we're
		// running as Rococo we only use `BridgeWococoMessages`/`BridgeWococoMessagesDispatch`, and vice versa.
		BridgeRococoMessages: pallet_bridge_messages::{Pallet, Call, Storage, Event<T>, Config<T>} = 43,
		BridgeWococoMessages: pallet_bridge_messages::<Instance1>::{Pallet, Call, Storage, Event<T>, Config<T>} = 44,
		BridgeRococoMessagesDispatch: pallet_bridge_dispatch::{Pallet, Event<T>} = 45,
		BridgeWococoMessagesDispatch: pallet_bridge_dispatch::<Instance1>::{Pallet, Event<T>} = 46,

		// A "council"
		Collective: pallet_collective::{Pallet, Call, Storage, Origin<T>, Event<T>, Config<T>} = 80,
		Membership: pallet_membership::{Pallet, Call, Storage, Event<T>, Config<T>} = 81,

		Utility: pallet_utility::{Pallet, Call, Event} = 90,
		Proxy: pallet_proxy::{Pallet, Call, Storage, Event<T>} = 91,

		// Pallet for sending XCM.
		XcmPallet: pallet_xcm::{Pallet, Call, Storage, Event<T>, Origin} = 99,
	}
}

pub struct BaseFilter;
impl Filter<Call> for BaseFilter {
	fn filter(_call: &Call) -> bool {
		true
	}
}

parameter_types! {
	pub const Version: RuntimeVersion = VERSION;
	pub const SS58Prefix: u8 = 42;
}

impl frame_system::Config for Runtime {
	type BaseCallFilter = BaseFilter;
	type BlockWeights = BlockWeights;
	type BlockLength = BlockLength;
	type DbWeight = RocksDbWeight;
	type Origin = Origin;
	type Call = Call;
	type Index = Nonce;
	type BlockNumber = BlockNumber;
	type Hash = Hash;
	type Hashing = BlakeTwo256;
	type AccountId = AccountId;
	type Lookup = AccountIdLookup<AccountId, ()>;
	type Header = generic::Header<BlockNumber, BlakeTwo256>;
	type Event = Event;
	type BlockHashCount = BlockHashCount;
	type Version = Version;
	type PalletInfo = PalletInfo;
	type AccountData = pallet_balances::AccountData<Balance>;
	type OnNewAccount = ();
	type OnKilledAccount = ();
	type SystemWeightInfo = ();
	type SS58Prefix = SS58Prefix;
	type OnSetCode = ();
}

parameter_types! {
	pub const ValidationUpgradeFrequency: BlockNumber = 2 * DAYS;
	pub const ValidationUpgradeDelay: BlockNumber = 8 * HOURS;
	pub const SlashPeriod: BlockNumber = 7 * DAYS;
}

/// Submits a transaction with the node's public and signature type. Adheres to the signed extension
/// format of the chain.
impl<LocalCall> frame_system::offchain::CreateSignedTransaction<LocalCall> for Runtime
where
	Call: From<LocalCall>,
{
	fn create_transaction<C: frame_system::offchain::AppCrypto<Self::Public, Self::Signature>>(
		call: Call,
		public: <Signature as Verify>::Signer,
		account: AccountId,
		nonce: <Runtime as frame_system::Config>::Index,
	) -> Option<(Call, <UncheckedExtrinsic as ExtrinsicT>::SignaturePayload)> {
		use sp_runtime::traits::StaticLookup;
		// take the biggest period possible.
		let period =
			BlockHashCount::get().checked_next_power_of_two().map(|c| c / 2).unwrap_or(2) as u64;

		let current_block = System::block_number()
			.saturated_into::<u64>()
			// The `System::block_number` is initialized with `n+1`,
			// so the actual block number is `n`.
			.saturating_sub(1);
		let tip = 0;
		let extra: SignedExtra = (
			frame_system::CheckSpecVersion::<Runtime>::new(),
			frame_system::CheckTxVersion::<Runtime>::new(),
			frame_system::CheckGenesis::<Runtime>::new(),
			frame_system::CheckMortality::<Runtime>::from(generic::Era::mortal(
				period,
				current_block,
			)),
			frame_system::CheckNonce::<Runtime>::from(nonce),
			frame_system::CheckWeight::<Runtime>::new(),
			pallet_transaction_payment::ChargeTransactionPayment::<Runtime>::from(tip),
		);
		let raw_payload = SignedPayload::new(call, extra)
			.map_err(|e| {
				log::warn!("Unable to create signed payload: {:?}", e);
			})
			.ok()?;
		let signature = raw_payload.using_encoded(|payload| C::sign(payload, public))?;
		let (call, extra, _) = raw_payload.deconstruct();
		let address = <Runtime as frame_system::Config>::Lookup::unlookup(account);
		Some((call, (address, signature, extra)))
	}
}

impl frame_system::offchain::SigningTypes for Runtime {
	type Public = <Signature as Verify>::Signer;
	type Signature = Signature;
}

/// Special `FullIdentificationOf` implementation that is returning for every input `Some(Default::default())`.
pub struct FullIdentificationOf;
impl sp_runtime::traits::Convert<AccountId, Option<()>> for FullIdentificationOf {
	fn convert(_: AccountId) -> Option<()> {
		Some(Default::default())
	}
}

impl pallet_session::historical::Config for Runtime {
	type FullIdentification = ();
	type FullIdentificationOf = FullIdentificationOf;
}

parameter_types! {
	pub SessionDuration: BlockNumber = EpochDurationInBlocks::get() as _;
}

parameter_types! {
	pub const ImOnlineUnsignedPriority: TransactionPriority = TransactionPriority::max_value();
}

impl pallet_im_online::Config for Runtime {
	type AuthorityId = ImOnlineId;
	type Event = Event;
	type ValidatorSet = Historical;
	type NextSessionRotation = Babe;
	type ReportUnresponsiveness = Offences;
	type UnsignedPriority = ImOnlineUnsignedPriority;
	type WeightInfo = ();
}

parameter_types! {
	pub const ExistentialDeposit: Balance = 1 * CENTS;
	pub const MaxLocks: u32 = 50;
	pub const MaxReserves: u32 = 50;
}

impl pallet_balances::Config for Runtime {
	type Balance = Balance;
	type DustRemoval = ();
	type Event = Event;
	type ExistentialDeposit = ExistentialDeposit;
	type AccountStore = System;
	type MaxLocks = MaxLocks;
	type MaxReserves = MaxReserves;
	type ReserveIdentifier = [u8; 8];
	type WeightInfo = ();
}

impl<C> frame_system::offchain::SendTransactionTypes<C> for Runtime
where
	Call: From<C>,
{
	type OverarchingCall = Call;
	type Extrinsic = UncheckedExtrinsic;
}

parameter_types! {
	pub const MaxRetries: u32 = 3;
}

impl pallet_offences::Config for Runtime {
	type Event = Event;
	type IdentificationTuple = pallet_session::historical::IdentificationTuple<Self>;
	type OnOffenceHandler = ();
}

impl pallet_authority_discovery::Config for Runtime {}

parameter_types! {
	pub const MinimumPeriod: u64 = SLOT_DURATION / 2;
}
impl pallet_timestamp::Config for Runtime {
	type Moment = u64;
	type OnTimestampSet = Babe;
	type MinimumPeriod = MinimumPeriod;
	type WeightInfo = ();
}

parameter_types! {
	pub const TransactionByteFee: Balance = 10 * MILLICENTS;
}

impl pallet_transaction_payment::Config for Runtime {
	type OnChargeTransaction = CurrencyAdapter<Balances, ToAuthor<Runtime>>;
	type TransactionByteFee = TransactionByteFee;
	type WeightToFee = WeightToFee;
	type FeeMultiplierUpdate = SlowAdjustingFeeUpdate<Self>;
}

parameter_types! {
	pub const DisabledValidatorsThreshold: Perbill = Perbill::from_percent(17);
}

/// Special `ValidatorIdOf` implementation that is just returning the input as result.
pub struct ValidatorIdOf;
impl sp_runtime::traits::Convert<AccountId, Option<AccountId>> for ValidatorIdOf {
	fn convert(a: AccountId) -> Option<AccountId> {
		Some(a)
	}
}

impl pallet_session::Config for Runtime {
	type Event = Event;
	type ValidatorId = AccountId;
	type ValidatorIdOf = ValidatorIdOf;
	type ShouldEndSession = Babe;
	type NextSessionRotation = Babe;
	type SessionManager = pallet_session::historical::NoteHistoricalRoot<Self, ValidatorManager>;
	type SessionHandler = <SessionKeys as OpaqueKeys>::KeyTypeIdProviders;
	type Keys = SessionKeys;
	type DisabledValidatorsThreshold = DisabledValidatorsThreshold;
	type WeightInfo = ();
}

parameter_types! {
	pub const ExpectedBlockTime: Moment = MILLISECS_PER_BLOCK;
	pub ReportLongevity: u64 = EpochDurationInBlocks::get() as u64 * 10;
}

impl pallet_babe::Config for Runtime {
	type EpochDuration = EpochDurationInBlocks;
	type ExpectedBlockTime = ExpectedBlockTime;

	// session module is the trigger
	type EpochChangeTrigger = pallet_babe::ExternalTrigger;

	type KeyOwnerProofSystem = Historical;

	type KeyOwnerProof = <Self::KeyOwnerProofSystem as KeyOwnerProofSystem<(
		KeyTypeId,
		pallet_babe::AuthorityId,
	)>>::Proof;

	type KeyOwnerIdentification = <Self::KeyOwnerProofSystem as KeyOwnerProofSystem<(
		KeyTypeId,
		pallet_babe::AuthorityId,
	)>>::IdentificationTuple;

	type HandleEquivocation =
		pallet_babe::EquivocationHandler<Self::KeyOwnerIdentification, Offences, ReportLongevity>;

	type WeightInfo = ();
}

parameter_types! {
	pub const IndexDeposit: Balance = 1 * DOLLARS;
}

impl pallet_indices::Config for Runtime {
	type AccountIndex = AccountIndex;
	type Currency = Balances;
	type Deposit = IndexDeposit;
	type Event = Event;
	type WeightInfo = ();
}

parameter_types! {
	pub const AttestationPeriod: BlockNumber = 50;
}

impl pallet_grandpa::Config for Runtime {
	type Event = Event;
	type Call = Call;

	type KeyOwnerProofSystem = Historical;

	type KeyOwnerProof =
		<Self::KeyOwnerProofSystem as KeyOwnerProofSystem<(KeyTypeId, GrandpaId)>>::Proof;

	type KeyOwnerIdentification = <Self::KeyOwnerProofSystem as KeyOwnerProofSystem<(
		KeyTypeId,
		GrandpaId,
	)>>::IdentificationTuple;

	type HandleEquivocation = pallet_grandpa::EquivocationHandler<
		Self::KeyOwnerIdentification,
		Offences,
		ReportLongevity,
	>;

	type WeightInfo = ();
}

parameter_types! {
	pub const UncleGenerations: u32 = 0;
}

impl pallet_authorship::Config for Runtime {
	type FindAuthor = pallet_session::FindAccountFromAuthorIndex<Self, Babe>;
	type UncleGenerations = UncleGenerations;
	type FilterUncle = ();
	type EventHandler = ImOnline;
}

impl parachains_origin::Config for Runtime {}

impl parachains_configuration::Config for Runtime {}

impl parachains_shared::Config for Runtime {}

/// Special `RewardValidators` that does nothing ;)
pub struct RewardValidators;
impl runtime_parachains::inclusion::RewardValidators for RewardValidators {
	fn reward_backing(_: impl IntoIterator<Item = ValidatorIndex>) {}
	fn reward_bitfields(_: impl IntoIterator<Item = ValidatorIndex>) {}
}

impl parachains_inclusion::Config for Runtime {
	type Event = Event;
	type DisputesHandler = ();
	type RewardValidators = RewardValidators;
}

impl parachains_paras::Config for Runtime {
	type Origin = Origin;
	type Event = Event;
}

parameter_types! {
	pub const RocLocation: MultiLocation = MultiLocation::Null;
	pub const RococoNetwork: NetworkId = NetworkId::Polkadot;
	pub const Ancestry: MultiLocation = MultiLocation::Null;
	pub CheckAccount: AccountId = XcmPallet::check_account();
}

pub type SovereignAccountOf =
	(ChildParachainConvertsVia<ParaId, AccountId>, AccountId32Aliases<RococoNetwork, AccountId>);

pub type LocalAssetTransactor = XcmCurrencyAdapter<
	// Use this currency:
	Balances,
	// Use this currency when it is a fungible asset matching the given location or name:
	IsConcrete<RocLocation>,
	// We can convert the MultiLocations with our converter above:
	SovereignAccountOf,
	// Our chain's account ID type (we can't get away without mentioning it explicitly):
	AccountId,
	// It's a native asset so we keep track of the teleports to maintain total issuance.
	CheckAccount,
>;

type LocalOriginConverter = (
	SovereignSignedViaLocation<SovereignAccountOf, Origin>,
	ChildParachainAsNative<parachains_origin::Origin, Origin>,
	SignedAccountId32AsNative<RococoNetwork, Origin>,
	ChildSystemParachainAsSuperuser<ParaId, Origin>,
);

parameter_types! {
	pub const BaseXcmWeight: Weight = 100_000;
}

/// The XCM router. When we want to send an XCM message, we use this type. It amalgamates all of our
/// individual routers.
pub type XcmRouter = (
	// Only one router so far - use DMP to communicate with child parachains.
	xcm_sender::ChildParachainRouter<Runtime>,
);

use xcm::v0::{
	Junction::Parachain,
	MultiAsset,
	MultiAsset::AllConcreteFungible,
	MultiLocation::{Null, X1},
};
parameter_types! {
	pub const RococoForTick: (MultiAsset, MultiLocation) =
		(AllConcreteFungible { id: Null }, X1(Parachain(100)));
	pub const RococoForTrick: (MultiAsset, MultiLocation) =
		(AllConcreteFungible { id: Null }, X1(Parachain(110)));
	pub const RococoForTrack: (MultiAsset, MultiLocation) =
		(AllConcreteFungible { id: Null }, X1(Parachain(120)));
	pub const RococoForStatemint: (MultiAsset, MultiLocation) =
		(AllConcreteFungible { id: Null }, X1(Parachain(1001)));
}
pub type TrustedTeleporters = (
	xcm_builder::Case<RococoForTick>,
	xcm_builder::Case<RococoForTrick>,
	xcm_builder::Case<RococoForTrack>,
	xcm_builder::Case<RococoForStatemint>,
);

parameter_types! {
	pub AllowUnpaidFrom: Vec<MultiLocation> =
		vec![
			X1(Parachain(100)),
			X1(Parachain(110)),
			X1(Parachain(120)),
			X1(Parachain(1001))
		];
}

use xcm_builder::{AllowTopLevelPaidExecutionFrom, AllowUnpaidExecutionFrom, TakeWeightCredit};
pub type Barrier = (
	TakeWeightCredit,
	AllowTopLevelPaidExecutionFrom<All<MultiLocation>>,
	AllowUnpaidExecutionFrom<IsInVec<AllowUnpaidFrom>>, // <- Trusted parachains get free execution
);

pub struct XcmConfig;
impl xcm_executor::Config for XcmConfig {
	type Call = Call;
	type XcmSender = XcmRouter;
	type AssetTransactor = LocalAssetTransactor;
	type OriginConverter = LocalOriginConverter;
	type IsReserve = ();
	type IsTeleporter = TrustedTeleporters;
	type LocationInverter = LocationInverter<Ancestry>;
	type Barrier = Barrier;
	type Weigher = FixedWeightBounds<BaseXcmWeight, Call>;
	type Trader = UsingComponents<WeightToFee, RocLocation, AccountId, Balances, ToAuthor<Runtime>>;
	type ResponseHandler = ();
}

parameter_types! {
	pub const CollectiveBodyId: BodyId = BodyId::Unit;
}

/// Type to convert an `Origin` type value into a `MultiLocation` value which represents an interior location
/// of this chain.
pub type LocalOriginToLocation = (
	// We allow an origin from the Collective pallet to be used in XCM as a corresponding Plurality of the
	// `Unit` body.
	BackingToPlurality<Origin, pallet_collective::Origin<Runtime>, CollectiveBodyId>,
	// And a usual Signed origin to be used in XCM as a corresponding AccountId32
	SignedToAccountId32<Origin, AccountId, RococoNetwork>,
);

pub struct OnlyWithdrawTeleportForAccounts;
impl frame_support::traits::Contains<(MultiLocation, Xcm<Call>)>
	for OnlyWithdrawTeleportForAccounts
{
	fn contains((ref origin, ref msg): &(MultiLocation, Xcm<Call>)) -> bool {
		use xcm::v0::{
			Junction::{AccountId32, Plurality},
			MultiAsset::{All, ConcreteFungible},
			Order::{BuyExecution, DepositAsset, InitiateTeleport},
			Xcm::WithdrawAsset,
		};
		match origin {
			// Root and collective are allowed to execute anything.
			Null | X1(Plurality { .. }) => true,
			X1(AccountId32 { .. }) => {
				// An account ID trying to send a message. We ensure that it's sensible.
				// This checks that it's of the form:
				// WithdrawAsset {
				//   assets: [ ConcreteFungible { id: Null } ],
				//   effects: [ BuyExecution, InitiateTeleport {
				//     assets: All,
				//     dest: Parachain,
				//     effects: [ BuyExecution, DepositAssets {
				//       assets: All,
				//       dest: AccountId32,
				//     } ]
				//   } ]
				// }
				matches!(msg, WithdrawAsset { ref assets, ref effects }
					if assets.len() == 1
					&& matches!(assets[0], ConcreteFungible { id: Null, .. })
					&& effects.len() == 2
					&& matches!(effects[0], BuyExecution { .. })
					&& matches!(effects[1], InitiateTeleport { ref assets, dest: X1(Parachain(..)), ref effects }
						if assets.len() == 1
						&& matches!(assets[0], All)
						&& effects.len() == 2
						&& matches!(effects[0], BuyExecution { .. })
						&& matches!(effects[1], DepositAsset { ref assets, dest: X1(AccountId32{..}) }
							if assets.len() == 1
							&& matches!(assets[0], All)
						)
					)
				)
			},
			// Nobody else is allowed to execute anything.
			_ => false,
		}
	}
}

impl pallet_xcm::Config for Runtime {
	type Event = Event;
	type SendXcmOrigin = xcm_builder::EnsureXcmOrigin<Origin, LocalOriginToLocation>;
	type XcmRouter = XcmRouter;
	// Anyone can execute XCM messages locally...
	type ExecuteXcmOrigin = xcm_builder::EnsureXcmOrigin<Origin, LocalOriginToLocation>;
	// ...but they must match our filter, which requires them to be a simple withdraw + teleport.
	type XcmExecuteFilter = OnlyWithdrawTeleportForAccounts;
	type XcmExecutor = XcmExecutor<XcmConfig>;
	type XcmTeleportFilter = All<(MultiLocation, Vec<MultiAsset>)>;
	type XcmReserveTransferFilter = All<(MultiLocation, Vec<MultiAsset>)>;
	type Weigher = FixedWeightBounds<BaseXcmWeight, Call>;
}

impl parachains_session_info::Config for Runtime {}

parameter_types! {
	pub const FirstMessageFactorPercent: u64 = 100;
}

impl parachains_ump::Config for Runtime {
	type Event = Event;
	type UmpSink = crate::parachains_ump::XcmSink<XcmExecutor<XcmConfig>, Runtime>;
	type FirstMessageFactorPercent = FirstMessageFactorPercent;
}

impl parachains_dmp::Config for Runtime {}

impl parachains_hrmp::Config for Runtime {
	type Event = Event;
	type Origin = Origin;
	type Currency = Balances;
}

impl parachains_paras_inherent::Config for Runtime {}

impl parachains_scheduler::Config for Runtime {}

impl parachains_initializer::Config for Runtime {
	type Randomness = pallet_babe::RandomnessFromOneEpochAgo<Runtime>;
	type ForceOrigin = EnsureRoot<AccountId>;
}

impl paras_sudo_wrapper::Config for Runtime {}

parameter_types! {
	pub const ParaDeposit: Balance = 5 * DOLLARS;
	pub const DataDepositPerByte: Balance = deposit(0, 1);
}

impl paras_registrar::Config for Runtime {
	type Event = Event;
	type Origin = Origin;
	type Currency = Balances;
	type OnSwap = (Crowdloan, Slots);
	type ParaDeposit = ParaDeposit;
	type DataDepositPerByte = DataDepositPerByte;
	type WeightInfo = paras_registrar::TestWeightInfo;
}

/// An insecure randomness beacon that uses the parent block hash as random material.
///
/// THIS SHOULD ONLY BE USED FOR TESTING PURPOSES.
pub struct ParentHashRandomness;

impl pallet_beefy::Config for Runtime {
	type BeefyId = BeefyId;
}

impl pallet_mmr::Config for Runtime {
	const INDEXING_PREFIX: &'static [u8] = b"mmr";
	type Hashing = Keccak256;
	type Hash = <Keccak256 as traits::Hash>::Output;
	type OnNewRoot = pallet_beefy_mmr::DepositBeefyDigest<Runtime>;
	type WeightInfo = ();
	type LeafData = pallet_beefy_mmr::Pallet<Runtime>;
}

pub struct ParasProvider;
impl pallet_beefy_mmr::ParachainHeadsProvider for ParasProvider {
	fn parachain_heads() -> Vec<(u32, Vec<u8>)> {
		Paras::parachains()
			.into_iter()
			.filter_map(|id| Paras::para_head(&id).map(|head| (id.into(), head.0)))
			.collect()
	}
}

parameter_types! {
	/// Version of the produced MMR leaf.
	///
	/// The version consists of two parts;
	/// - `major` (3 bits)
	/// - `minor` (5 bits)
	///
	/// `major` should be updated only if decoding the previous MMR Leaf format from the payload
	/// is not possible (i.e. backward incompatible change).
	/// `minor` should be updated if fields are added to the previous MMR Leaf, which given SCALE
	/// encoding does not prevent old leafs from being decoded.
	///
	/// Hence we expect `major` to be changed really rarely (think never).
	/// See [`MmrLeafVersion`] type documentation for more details.
	pub LeafVersion: MmrLeafVersion = MmrLeafVersion::new(0, 0);
}

impl pallet_beefy_mmr::Config for Runtime {
	type LeafVersion = LeafVersion;
	type BeefyAuthorityToMerkleLeaf = pallet_beefy_mmr::BeefyEcdsaToEthereum;
	type ParachainHeads = ParasProvider;
}

parameter_types! {
	/// This is a pretty unscientific cap.
	///
	/// Note that once this is hit the pallet will essentially throttle incoming requests down to one
	/// call per block.
	pub const MaxRequests: u32 = 4 * HOURS as u32;

	/// Number of headers to keep.
	///
	/// Assuming the worst case of every header being finalized, we will keep headers at least for a
	/// week.
	pub const HeadersToKeep: u32 = 7 * DAYS as u32;
}

pub type RococoGrandpaInstance = ();
impl pallet_bridge_grandpa::Config for Runtime {
	type BridgedChain = bp_rococo::Rococo;
	type MaxRequests = MaxRequests;
	type HeadersToKeep = HeadersToKeep;

	type WeightInfo = pallet_bridge_grandpa::weights::RialtoWeight<Runtime>;
}

pub type WococoGrandpaInstance = pallet_bridge_grandpa::Instance1;
impl pallet_bridge_grandpa::Config<WococoGrandpaInstance> for Runtime {
	type BridgedChain = bp_wococo::Wococo;
	type MaxRequests = MaxRequests;
	type HeadersToKeep = HeadersToKeep;

	type WeightInfo = pallet_bridge_grandpa::weights::RialtoWeight<Runtime>;
}

// Instance that is "deployed" at Wococo chain. Responsible for dispatching Rococo -> Wococo messages.
pub type AtWococoFromRococoMessagesDispatch = pallet_bridge_dispatch::DefaultInstance;
impl pallet_bridge_dispatch::Config<AtWococoFromRococoMessagesDispatch> for Runtime {
	type Event = Event;
	type MessageId = (bp_messages::LaneId, bp_messages::MessageNonce);
	type Call = Call;
	type CallFilter = frame_support::traits::AllowAll;
	type EncodedCall = bridge_messages::FromRococoEncodedCall;
	type SourceChainAccountId = bp_wococo::AccountId;
	type TargetChainAccountPublic = sp_runtime::MultiSigner;
	type TargetChainSignature = sp_runtime::MultiSignature;
	type AccountIdConverter = bp_rococo::AccountIdConverter;
}

// Instance that is "deployed" at Rococo chain. Responsible for dispatching Wococo -> Rococo messages.
pub type AtRococoFromWococoMessagesDispatch = pallet_bridge_dispatch::Instance1;
impl pallet_bridge_dispatch::Config<AtRococoFromWococoMessagesDispatch> for Runtime {
	type Event = Event;
	type MessageId = (bp_messages::LaneId, bp_messages::MessageNonce);
	type Call = Call;
	type CallFilter = frame_support::traits::AllowAll;
	type EncodedCall = bridge_messages::FromWococoEncodedCall;
	type SourceChainAccountId = bp_rococo::AccountId;
	type TargetChainAccountPublic = sp_runtime::MultiSigner;
	type TargetChainSignature = sp_runtime::MultiSignature;
	type AccountIdConverter = bp_wococo::AccountIdConverter;
}

parameter_types! {
	pub const MaxMessagesToPruneAtOnce: bp_messages::MessageNonce = 8;
	pub const MaxUnrewardedRelayerEntriesAtInboundLane: bp_messages::MessageNonce =
		bp_rococo::MAX_UNREWARDED_RELAYER_ENTRIES_AT_INBOUND_LANE;
	pub const MaxUnconfirmedMessagesAtInboundLane: bp_messages::MessageNonce =
		bp_rococo::MAX_UNCONFIRMED_MESSAGES_AT_INBOUND_LANE;
	pub const RootAccountForPayments: Option<AccountId> = None;
}

// Instance that is "deployed" at Wococo chain. Responsible for sending Wococo -> Rococo messages
// and receiving Rococo -> Wococo messages.
pub type AtWococoWithRococoMessagesInstance = pallet_bridge_messages::DefaultInstance;
impl pallet_bridge_messages::Config<AtWococoWithRococoMessagesInstance> for Runtime {
	type Event = Event;
	type WeightInfo = pallet_bridge_messages::weights::RialtoWeight<Runtime>;
	type Parameter = ();
	type MaxMessagesToPruneAtOnce = MaxMessagesToPruneAtOnce;
	type MaxUnrewardedRelayerEntriesAtInboundLane = MaxUnrewardedRelayerEntriesAtInboundLane;
	type MaxUnconfirmedMessagesAtInboundLane = MaxUnconfirmedMessagesAtInboundLane;

	type OutboundPayload = crate::bridge_messages::ToRococoMessagePayload;
	type OutboundMessageFee = bp_wococo::Balance;

	type InboundPayload = crate::bridge_messages::FromRococoMessagePayload;
	type InboundMessageFee = bp_rococo::Balance;
	type InboundRelayer = bp_rococo::AccountId;

	type AccountIdConverter = bp_wococo::AccountIdConverter;

	type TargetHeaderChain = crate::bridge_messages::RococoAtWococo;
	type LaneMessageVerifier = crate::bridge_messages::ToRococoMessageVerifier;
	type MessageDeliveryAndDispatchPayment =
		pallet_bridge_messages::instant_payments::InstantCurrencyPayments<
			Runtime,
			pallet_balances::Pallet<Runtime>,
			crate::bridge_messages::GetDeliveryConfirmationTransactionFee,
			RootAccountForPayments,
		>;
	type OnDeliveryConfirmed = ();

	type SourceHeaderChain = crate::bridge_messages::RococoAtWococo;
	type MessageDispatch = crate::bridge_messages::FromRococoMessageDispatch;
}

// Instance that is "deployed" at Rococo chain. Responsible for sending Rococo -> Wococo messages
// and receiving Wococo -> Rococo messages.
pub type AtRococoWithWococoMessagesInstance = pallet_bridge_messages::Instance1;
impl pallet_bridge_messages::Config<AtRococoWithWococoMessagesInstance> for Runtime {
	type Event = Event;
	type WeightInfo = pallet_bridge_messages::weights::RialtoWeight<Runtime>;
	type Parameter = ();
	type MaxMessagesToPruneAtOnce = MaxMessagesToPruneAtOnce;
	type MaxUnrewardedRelayerEntriesAtInboundLane = MaxUnrewardedRelayerEntriesAtInboundLane;
	type MaxUnconfirmedMessagesAtInboundLane = MaxUnconfirmedMessagesAtInboundLane;

	type OutboundPayload = crate::bridge_messages::ToWococoMessagePayload;
	type OutboundMessageFee = bp_rococo::Balance;

	type InboundPayload = crate::bridge_messages::FromWococoMessagePayload;
	type InboundMessageFee = bp_wococo::Balance;
	type InboundRelayer = bp_wococo::AccountId;

	type AccountIdConverter = bp_rococo::AccountIdConverter;

	type TargetHeaderChain = crate::bridge_messages::WococoAtRococo;
	type LaneMessageVerifier = crate::bridge_messages::ToWococoMessageVerifier;
	type MessageDeliveryAndDispatchPayment =
		pallet_bridge_messages::instant_payments::InstantCurrencyPayments<
			Runtime,
			pallet_balances::Pallet<Runtime>,
			crate::bridge_messages::GetDeliveryConfirmationTransactionFee,
			RootAccountForPayments,
		>;
	type OnDeliveryConfirmed = ();

	type SourceHeaderChain = crate::bridge_messages::WococoAtRococo;
	type MessageDispatch = crate::bridge_messages::FromWococoMessageDispatch;
}

impl Randomness<Hash, BlockNumber> for ParentHashRandomness {
	fn random(subject: &[u8]) -> (Hash, BlockNumber) {
		(
			(System::parent_hash(), subject)
				.using_encoded(sp_io::hashing::blake2_256)
				.into(),
			System::block_number(),