lib.rs

// Copyright 2017-2020 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 Polkadot 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"]

use pallet_transaction_payment::CurrencyAdapter;
use runtime_common::{
	claims, SlowAdjustingFeeUpdate, CurrencyToVote,
	impls::DealWithFees,
	BlockHashCount, RocksDbWeight, BlockWeights, BlockLength, OffchainSolutionWeightLimit,
	ParachainSessionKeyPlaceholder, AssignmentSessionKeyPlaceholder,
};

use sp_std::prelude::*;
use sp_std::collections::btree_map::BTreeMap;
use sp_core::u32_trait::{_1, _2, _3, _4, _5};
use parity_scale_codec::{Encode, Decode};
use primitives::v1::{
	AccountId, AccountIndex, Balance, BlockNumber, CandidateEvent, CommittedCandidateReceipt,
	CoreState, GroupRotationInfo, Hash, Id, Moment, Nonce, OccupiedCoreAssumption,
	PersistedValidationData, Signature, ValidationCode, ValidatorId, ValidatorIndex,
	InboundDownwardMessage, InboundHrmpMessage, SessionInfo,
};
use sp_runtime::{
	create_runtime_str, generic, impl_opaque_keys, ModuleId, ApplyExtrinsicResult,
	KeyTypeId, Percent, Permill, Perbill, curve::PiecewiseLinear,
	transaction_validity::{TransactionValidity, TransactionSource, TransactionPriority},
	traits::{
		BlakeTwo256, Block as BlockT, OpaqueKeys, ConvertInto, AccountIdLookup,
		Extrinsic as ExtrinsicT, SaturatedConversion, Verify,
	},
};
#[cfg(feature = "runtime-benchmarks")]
use sp_runtime::RuntimeString;
use sp_version::RuntimeVersion;
use pallet_grandpa::{AuthorityId as GrandpaId, fg_primitives};
#[cfg(any(feature = "std", test))]
use sp_version::NativeVersion;
use sp_core::OpaqueMetadata;
use sp_staking::SessionIndex;
use frame_support::{
	parameter_types, construct_runtime, RuntimeDebug,
	traits::{KeyOwnerProofSystem, Randomness, LockIdentifier, Filter},
	weights::Weight,
};
use frame_system::{EnsureRoot, EnsureOneOf};
use pallet_im_online::sr25519::AuthorityId as ImOnlineId;
use authority_discovery_primitives::AuthorityId as AuthorityDiscoveryId;
use pallet_transaction_payment::{FeeDetails, RuntimeDispatchInfo};
use pallet_session::historical as session_historical;
use static_assertions::const_assert;

#[cfg(feature = "std")]
pub use pallet_staking::StakerStatus;
#[cfg(any(feature = "std", test))]
pub use sp_runtime::BuildStorage;
pub use pallet_timestamp::Call as TimestampCall;
pub use pallet_balances::Call as BalancesCall;

/// Constant values used within the runtime.
pub mod constants;
use constants::{time::*, currency::*, fee::*};
use frame_support::traits::InstanceFilter;

// Weights used in the runtime.
mod weights;

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

// Polkadot version identifier;
/// Runtime version (Polkadot).
pub const VERSION: RuntimeVersion = RuntimeVersion {
	spec_name: create_runtime_str!("polkadot"),
	impl_name: create_runtime_str!("parity-polkadot"),
	authoring_version: 0,
	spec_version: 30,
	impl_version: 0,
	#[cfg(not(feature = "disable-runtime-api"))]
	apis: RUNTIME_API_VERSIONS,
	#[cfg(feature = "disable-runtime-api")]
	apis: version::create_apis_vec![[]],
	transaction_version: 6,
};

/// 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(),
	}
}

pub struct BaseFilter;
impl Filter<Call> for BaseFilter {
	fn filter(call: &Call) -> bool {
		match call {
			// These modules are all allowed to be called by transactions:
			Call::Democracy(_) | Call::Council(_) | Call::TechnicalCommittee(_) |
			Call::TechnicalMembership(_) | Call::Treasury(_) | Call::ElectionsPhragmen(_) |
			Call::System(_) | Call::Scheduler(_) | Call::Indices(_) |
			Call::Babe(_) | Call::Timestamp(_) | Call::Balances(_) |
			Call::Authorship(_) | Call::Staking(_) | Call::Offences(_) |
			Call::Session(_) | Call::Grandpa(_) | Call::ImOnline(_) |
			Call::AuthorityDiscovery(_) |
			Call::Utility(_) | Call::Claims(_) | Call::Vesting(_) |
			Call::Identity(_) | Call::Proxy(_) | Call::Multisig(_) |
			Call::Bounties(_) | Call::Tips(_) | Call::ElectionProviderMultiPhase(_)
			=> true,
		}
	}
}

type MoreThanHalfCouncil = EnsureOneOf<
	AccountId,
	EnsureRoot<AccountId>,
	pallet_collective::EnsureProportionMoreThan<_1, _2, AccountId, CouncilCollective>
>;

parameter_types! {
	pub const Version: RuntimeVersion = VERSION;
	pub const SS58Prefix: u8 = 0;
}

impl frame_system::Config for Runtime {
	type BaseCallFilter = BaseFilter;
	type BlockWeights = BlockWeights;
	type BlockLength = BlockLength;
	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 DbWeight = RocksDbWeight;
	type Version = Version;
	type PalletInfo = PalletInfo;
	type AccountData = pallet_balances::AccountData<Balance>;
	type OnNewAccount = ();
	type OnKilledAccount = ();
	type SystemWeightInfo = weights::frame_system::WeightInfo<Runtime>;
	type SS58Prefix = SS58Prefix;
}

parameter_types! {
	pub MaximumSchedulerWeight: Weight = Perbill::from_percent(80) *
		BlockWeights::get().max_block;
	pub const MaxScheduledPerBlock: u32 = 50;
}

impl pallet_scheduler::Config for Runtime {
	type Event = Event;
	type Origin = Origin;
	type PalletsOrigin = OriginCaller;
	type Call = Call;
	type MaximumWeight = MaximumSchedulerWeight;
	type ScheduleOrigin = EnsureRoot<AccountId>;
	type MaxScheduledPerBlock = MaxScheduledPerBlock;
	type WeightInfo = weights::pallet_scheduler::WeightInfo<Runtime>;
}

parameter_types! {
	pub const EpochDuration: u64 = EPOCH_DURATION_IN_BLOCKS as u64;
	pub const ExpectedBlockTime: Moment = MILLISECS_PER_BLOCK;
	pub const ReportLongevity: u64 =
		BondingDuration::get() as u64 * SessionsPerEra::get() as u64 * EpochDuration::get();
}

impl pallet_babe::Config for Runtime {
	type EpochDuration = EpochDuration;
	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 = 10 * DOLLARS;
}

impl pallet_indices::Config for Runtime {
	type AccountIndex = AccountIndex;
	type Currency = Balances;
	type Deposit = IndexDeposit;
	type Event = Event;
	type WeightInfo = weights::pallet_indices::WeightInfo<Runtime>;
}

parameter_types! {
	pub const ExistentialDeposit: Balance = 100 * CENTS;
	pub const MaxLocks: 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 WeightInfo = weights::pallet_balances::WeightInfo<Runtime>;
}

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

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

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 = weights::pallet_timestamp::WeightInfo<Runtime>;
}

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

// TODO: substrate#2986 implement this properly
impl pallet_authorship::Config for Runtime {
	type FindAuthor = pallet_session::FindAccountFromAuthorIndex<Self, Babe>;
	type UncleGenerations = UncleGenerations;
	type FilterUncle = ();
	type EventHandler = (Staking, ImOnline);
}

impl_opaque_keys! {
	pub struct SessionKeys {
		pub grandpa: Grandpa,
		pub babe: Babe,
		pub im_online: ImOnline,
		pub para_validator: ParachainSessionKeyPlaceholder<Runtime>,
		pub para_assignment: AssignmentSessionKeyPlaceholder<Runtime>,
		pub authority_discovery: AuthorityDiscovery,
	}
}

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

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

impl pallet_session::historical::Config for Runtime {
	type FullIdentification = pallet_staking::Exposure<AccountId, Balance>;
	type FullIdentificationOf = pallet_staking::ExposureOf<Runtime>;
}

parameter_types! {
	// no signed phase for now, just unsigned.
	pub const SignedPhase: u32 = 0;
	// NOTE: length of unsigned phase is, for now, different than `ElectionLookahead` to make sure
	// that we won't run OCW threads at the same time with staking.
	pub const UnsignedPhase: u32 = ElectionLookahead::get() / 2;

	// fallback: no need to do on-chain phragmen while we re on a dry-run.
	pub const Fallback: pallet_election_provider_multi_phase::FallbackStrategy =
		pallet_election_provider_multi_phase::FallbackStrategy::Nothing;

	pub SolutionImprovementThreshold: Perbill = Perbill::from_rational_approximation(1u32, 10_000);

	// miner configs
	pub MultiPhaseUnsignedPriority: TransactionPriority = StakingUnsignedPriority::get() - 1u64;
	pub const MinerMaxIterations: u32 = 10;
}

impl pallet_election_provider_multi_phase::Config for Runtime {
	type Event = Event;
	type Currency = Balances;
	type SignedPhase = SignedPhase;
	type UnsignedPhase = UnsignedPhase;
	type SolutionImprovementThreshold = MinSolutionScoreBump;
	type MinerMaxIterations = MinerMaxIterations;
	type MinerMaxWeight = OffchainSolutionWeightLimit; // For now use the one from staking.
	type MinerTxPriority = MultiPhaseUnsignedPriority;
	type DataProvider = Staking;
	type OnChainAccuracy = Perbill;
	type CompactSolution = pallet_staking::CompactAssignments;
	type Fallback = Fallback;
	type BenchmarkingConfig = ();
	type WeightInfo = weights::pallet_election_provider_multi_phase::WeightInfo<Runtime>;
}

// TODO #6469: This shouldn't be static, but a lazily cached value, not built unless needed, and
// re-built in case input parameters have changed. The `ideal_stake` should be determined by the
// amount of parachain slots being bid on: this should be around `(75 - 25.min(slots / 4))%`.
pallet_staking_reward_curve::build! {
	const REWARD_CURVE: PiecewiseLinear<'static> = curve!(
		min_inflation: 0_025_000,
		max_inflation: 0_100_000,
		// 3:2:1 staked : parachains : float.
		// while there's no parachains, then this is 75% staked : 25% float.
		ideal_stake: 0_750_000,
		falloff: 0_050_000,
		max_piece_count: 40,
		test_precision: 0_005_000,
	);
}

parameter_types! {
	// Six sessions in an era (24 hours).
	pub const SessionsPerEra: SessionIndex = 6;
	// 28 eras for unbonding (28 days).
	pub const BondingDuration: pallet_staking::EraIndex = 28;
	pub const SlashDeferDuration: pallet_staking::EraIndex = 27;
	pub const RewardCurve: &'static PiecewiseLinear<'static> = &REWARD_CURVE;
	pub const MaxNominatorRewardedPerValidator: u32 = 128;
	// last 15 minutes of the last session will be for election.
	pub const ElectionLookahead: BlockNumber = EPOCH_DURATION_IN_BLOCKS / 16;
	pub const MaxIterations: u32 = 10;
	pub MinSolutionScoreBump: Perbill = Perbill::from_rational_approximation(5u32, 10_000);
}

type SlashCancelOrigin = EnsureOneOf<
	AccountId,
	EnsureRoot<AccountId>,
	pallet_collective::EnsureProportionAtLeast<_3, _4, AccountId, CouncilCollective>
>;

impl pallet_staking::Config for Runtime {
	type Currency = Balances;
	type UnixTime = Timestamp;
	type CurrencyToVote = CurrencyToVote;
	type RewardRemainder = Treasury;
	type Event = Event;
	type Slash = Treasury;
	type Reward = ();
	type SessionsPerEra = SessionsPerEra;
	type BondingDuration = BondingDuration;
	type SlashDeferDuration = SlashDeferDuration;
	// A super-majority of the council can cancel the slash.
	type SlashCancelOrigin = SlashCancelOrigin;
	type SessionInterface = Self;
	type RewardCurve = RewardCurve;
	type MaxNominatorRewardedPerValidator = MaxNominatorRewardedPerValidator;
	type NextNewSession = Session;
	type ElectionLookahead = ElectionLookahead;
	type Call = Call;
	type UnsignedPriority = StakingUnsignedPriority;
	type MaxIterations = MaxIterations;
	type MinSolutionScoreBump = MinSolutionScoreBump;
	// The unsigned solution weight targeted by the OCW. We set it to the maximum possible value of
	// a single extrinsic.
	type OffchainSolutionWeightLimit = OffchainSolutionWeightLimit;
	type ElectionProvider = ElectionProviderMultiPhase;
	type WeightInfo = weights::pallet_staking::WeightInfo<Runtime>;
}

parameter_types! {
	// Minimum 4 CENTS/byte
	pub const BasicDeposit: Balance = deposit(1, 258);
	pub const FieldDeposit: Balance = deposit(0, 66);
	pub const SubAccountDeposit: Balance = deposit(1, 53);
	pub const MaxSubAccounts: u32 = 100;
	pub const MaxAdditionalFields: u32 = 100;
	pub const MaxRegistrars: u32 = 20;
}

impl pallet_identity::Config for Runtime {
	type Event = Event;
	type Currency = Balances;
	type BasicDeposit = BasicDeposit;
	type FieldDeposit = FieldDeposit;
	type SubAccountDeposit = SubAccountDeposit;
	type MaxSubAccounts = MaxSubAccounts;
	type MaxAdditionalFields = MaxAdditionalFields;
	type MaxRegistrars = MaxRegistrars;
	type Slashed = Treasury;
	type ForceOrigin = MoreThanHalfCouncil;
	type RegistrarOrigin = MoreThanHalfCouncil;
	type WeightInfo = weights::pallet_identity::WeightInfo<Runtime>;
}

parameter_types! {
	pub const LaunchPeriod: BlockNumber = 28 * DAYS;
	pub const VotingPeriod: BlockNumber = 28 * DAYS;
	pub const FastTrackVotingPeriod: BlockNumber = 3 * HOURS;
	pub const MinimumDeposit: Balance = 100 * DOLLARS;
	pub const EnactmentPeriod: BlockNumber = 28 * DAYS;
	pub const CooloffPeriod: BlockNumber = 7 * DAYS;
	// One cent: $10,000 / MB
	pub const PreimageByteDeposit: Balance = 1 * CENTS;
	pub const InstantAllowed: bool = true;
	pub const MaxVotes: u32 = 100;
	pub const MaxProposals: u32 = 100;
}

impl pallet_democracy::Config for Runtime {
	type Proposal = Call;
	type Event = Event;
	type Currency = Balances;
	type EnactmentPeriod = EnactmentPeriod;
	type LaunchPeriod = LaunchPeriod;
	type VotingPeriod = VotingPeriod;
	type MinimumDeposit = MinimumDeposit;
	/// A straight majority of the council can decide what their next motion is.
	type ExternalOrigin = frame_system::EnsureOneOf<AccountId,
		pallet_collective::EnsureProportionAtLeast<_1, _2, AccountId, CouncilCollective>,
		frame_system::EnsureRoot<AccountId>,
	>;
	/// A 60% super-majority can have the next scheduled referendum be a straight majority-carries vote.
	type ExternalMajorityOrigin = frame_system::EnsureOneOf<AccountId,
		pallet_collective::EnsureProportionAtLeast<_3, _5, AccountId, CouncilCollective>,
		frame_system::EnsureRoot<AccountId>,
	>;
	/// A unanimous council can have the next scheduled referendum be a straight default-carries
	/// (NTB) vote.
	type ExternalDefaultOrigin = frame_system::EnsureOneOf<AccountId,
		pallet_collective::EnsureProportionAtLeast<_1, _1, AccountId, CouncilCollective>,
		frame_system::EnsureRoot<AccountId>,
	>;
	/// Two thirds of the technical committee can have an ExternalMajority/ExternalDefault vote
	/// be tabled immediately and with a shorter voting/enactment period.
	type FastTrackOrigin = frame_system::EnsureOneOf<AccountId,
		pallet_collective::EnsureProportionAtLeast<_2, _3, AccountId, TechnicalCollective>,
		frame_system::EnsureRoot<AccountId>,
	>;
	type InstantOrigin = frame_system::EnsureOneOf<AccountId,
		pallet_collective::EnsureProportionAtLeast<_1, _1, AccountId, TechnicalCollective>,
		frame_system::EnsureRoot<AccountId>,
	>;
	type InstantAllowed = InstantAllowed;
	type FastTrackVotingPeriod = FastTrackVotingPeriod;
	// To cancel a proposal which has been passed, 2/3 of the council must agree to it.
	type CancellationOrigin = EnsureOneOf<AccountId,
		pallet_collective::EnsureProportionAtLeast<_2, _3, AccountId, CouncilCollective>,
		EnsureRoot<AccountId>,
	>;
	// To cancel a proposal before it has been passed, the technical committee must be unanimous or
	// Root must agree.
	type CancelProposalOrigin = EnsureOneOf<AccountId,
		pallet_collective::EnsureProportionAtLeast<_1, _1, AccountId, TechnicalCollective>,
		EnsureRoot<AccountId>,
	>;
	type BlacklistOrigin = EnsureRoot<AccountId>;
	// Any single technical committee member may veto a coming council proposal, however they can
	// only do it once and it lasts only for the cooloff period.
	type VetoOrigin = pallet_collective::EnsureMember<AccountId, TechnicalCollective>;
	type CooloffPeriod = CooloffPeriod;
	type PreimageByteDeposit = PreimageByteDeposit;
	type OperationalPreimageOrigin = pallet_collective::EnsureMember<AccountId, CouncilCollective>;
	type Slash = Treasury;
	type Scheduler = Scheduler;
	type PalletsOrigin = OriginCaller;
	type MaxVotes = MaxVotes;
	type WeightInfo = weights::pallet_democracy::WeightInfo<Runtime>;
	type MaxProposals = MaxProposals;
}

parameter_types! {
	pub const CouncilMotionDuration: BlockNumber = 7 * DAYS;
	pub const CouncilMaxProposals: u32 = 100;
	pub const CouncilMaxMembers: u32 = 100;
}

type CouncilCollective = pallet_collective::Instance1;
impl pallet_collective::Config<CouncilCollective> for Runtime {
	type Origin = Origin;
	type Proposal = Call;
	type Event = Event;
	type MotionDuration = CouncilMotionDuration;
	type MaxProposals = CouncilMaxProposals;
	type MaxMembers = CouncilMaxMembers;
	type DefaultVote = pallet_collective::PrimeDefaultVote;
	type WeightInfo = weights::pallet_collective::WeightInfo<Runtime>;
}

parameter_types! {
	pub const CandidacyBond: Balance = 100 * DOLLARS;
	// 1 storage item created, key size is 32 bytes, value size is 16+16.
	pub const VotingBondBase: Balance = deposit(1, 64);
	// additional data per vote is 32 bytes (account id).
	pub const VotingBondFactor: Balance = deposit(0, 32);
	/// Weekly council elections; scaling up to monthly eventually.
	pub const TermDuration: BlockNumber = 7 * DAYS;
	/// 13 members initially, to be increased to 23 eventually.
	pub const DesiredMembers: u32 = 13;
	pub const DesiredRunnersUp: u32 = 20;
	pub const ElectionsPhragmenModuleId: LockIdentifier = *b"phrelect";
}
// Make sure that there are no more than `MaxMembers` members elected via phragmen.
const_assert!(DesiredMembers::get() <= CouncilMaxMembers::get());

impl pallet_elections_phragmen::Config for Runtime {
	type Event = Event;
	type ModuleId = ElectionsPhragmenModuleId;
	type Currency = Balances;
	type ChangeMembers = Council;
	type InitializeMembers = Council;
	type CurrencyToVote = frame_support::traits::U128CurrencyToVote;
	type CandidacyBond = CandidacyBond;
	type VotingBondBase = VotingBondBase;
	type VotingBondFactor = VotingBondFactor;
	type LoserCandidate = Treasury;
	type KickedMember = Treasury;
	type DesiredMembers = DesiredMembers;
	type DesiredRunnersUp = DesiredRunnersUp;
	type TermDuration = TermDuration;
	type WeightInfo = weights::pallet_elections_phragmen::WeightInfo<Runtime>;
}

parameter_types! {
	pub const TechnicalMotionDuration: BlockNumber = 7 * DAYS;
	pub const TechnicalMaxProposals: u32 = 100;
	pub const TechnicalMaxMembers: u32 = 100;
}

type TechnicalCollective = pallet_collective::Instance2;
impl pallet_collective::Config<TechnicalCollective> for Runtime {
	type Origin = Origin;
	type Proposal = Call;
	type Event = Event;
	type MotionDuration = TechnicalMotionDuration;
	type MaxProposals = TechnicalMaxProposals;
	type MaxMembers = TechnicalMaxMembers;
	type DefaultVote = pallet_collective::PrimeDefaultVote;
	type WeightInfo = weights::pallet_collective::WeightInfo<Runtime>;
}

impl pallet_membership::Config<pallet_membership::Instance1> for Runtime {
	type Event = Event;
	type AddOrigin = MoreThanHalfCouncil;
	type RemoveOrigin = MoreThanHalfCouncil;
	type SwapOrigin = MoreThanHalfCouncil;
	type ResetOrigin = MoreThanHalfCouncil;
	type PrimeOrigin = MoreThanHalfCouncil;
	type MembershipInitialized = TechnicalCommittee;
	type MembershipChanged = TechnicalCommittee;
}

parameter_types! {
	pub const ProposalBond: Permill = Permill::from_percent(5);
	pub const ProposalBondMinimum: Balance = 100 * DOLLARS;
	pub const SpendPeriod: BlockNumber = 24 * DAYS;
	pub const Burn: Permill = Permill::from_percent(1);
	pub const TreasuryModuleId: ModuleId = ModuleId(*b"py/trsry");

	pub const TipCountdown: BlockNumber = 1 * DAYS;
	pub const TipFindersFee: Percent = Percent::from_percent(20);
	pub const TipReportDepositBase: Balance = 1 * DOLLARS;
	pub const DataDepositPerByte: Balance = 1 * CENTS;
	pub const BountyDepositBase: Balance = 1 * DOLLARS;
	pub const BountyDepositPayoutDelay: BlockNumber = 8 * DAYS;
	pub const BountyUpdatePeriod: BlockNumber = 90 * DAYS;
	pub const MaximumReasonLength: u32 = 16384;
	pub const BountyCuratorDeposit: Permill = Permill::from_percent(50);
	pub const BountyValueMinimum: Balance = 10 * DOLLARS;
}

type ApproveOrigin = EnsureOneOf<
	AccountId,
	EnsureRoot<AccountId>,
	pallet_collective::EnsureProportionAtLeast<_3, _5, AccountId, CouncilCollective>
>;

impl pallet_treasury::Config for Runtime {
	type ModuleId = TreasuryModuleId;
	type Currency = Balances;
	type ApproveOrigin = ApproveOrigin;
	type RejectOrigin = MoreThanHalfCouncil;
	type Event = Event;
	type OnSlash = Treasury;
	type ProposalBond = ProposalBond;
	type ProposalBondMinimum = ProposalBondMinimum;
	type SpendPeriod = SpendPeriod;
	type Burn = Burn;
	type BurnDestination = ();
	type SpendFunds = Bounties;
	type WeightInfo = weights::pallet_treasury::WeightInfo<Runtime>;
}

impl pallet_bounties::Config for Runtime {
	type Event = Event;
	type BountyDepositBase = BountyDepositBase;
	type BountyDepositPayoutDelay = BountyDepositPayoutDelay;
	type BountyUpdatePeriod = BountyUpdatePeriod;
	type BountyCuratorDeposit = BountyCuratorDeposit;
	type BountyValueMinimum = BountyValueMinimum;
	type DataDepositPerByte = DataDepositPerByte;
	type MaximumReasonLength = MaximumReasonLength;
	type WeightInfo = weights::pallet_bounties::WeightInfo<Runtime>;
}

impl pallet_tips::Config for Runtime {
	type Event = Event;
	type DataDepositPerByte = DataDepositPerByte;
	type MaximumReasonLength = MaximumReasonLength;
	type Tippers = ElectionsPhragmen;
	type TipCountdown = TipCountdown;
	type TipFindersFee = TipFindersFee;
	type TipReportDepositBase = TipReportDepositBase;
	type WeightInfo = weights::pallet_tips::WeightInfo<Runtime>;
}

parameter_types! {
	pub OffencesWeightSoftLimit: Weight = Perbill::from_percent(60) * BlockWeights::get().max_block;
}

impl pallet_offences::Config for Runtime {
	type Event = Event;
	type IdentificationTuple = pallet_session::historical::IdentificationTuple<Self>;
	type OnOffenceHandler = Staking;
	type WeightSoftLimit = OffencesWeightSoftLimit;
}

impl pallet_authority_discovery::Config for Runtime {}

parameter_types! {
	pub const SessionDuration: BlockNumber = EPOCH_DURATION_IN_BLOCKS as _;
}

parameter_types! {
	pub StakingUnsignedPriority: TransactionPriority =
		Perbill::from_percent(90) * TransactionPriority::max_value();
	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 = weights::pallet_im_online::WeightInfo<Runtime>;
}

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

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

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

	type KeyOwnerProofSystem = Historical;

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

	type WeightInfo = ();
}

/// 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),
			claims::PrevalidateAttests::<Runtime>::new(),
		);
		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;
}

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

parameter_types! {
	pub const ParathreadDeposit: Balance = 500 * DOLLARS;
	pub const QueueSize: usize = 2;
	pub const MaxRetries: u32 = 3;
}

parameter_types! {
	pub Prefix: &'static [u8] = b"Pay DOTs to the Polkadot account:";
}

impl claims::Config for Runtime {
	type Event = Event;
	type VestingSchedule = Vesting;
	type Prefix = Prefix;
	/// At least 3/4 of the council must agree to a claim move before it can happen.
	type MoveClaimOrigin = pallet_collective::EnsureProportionAtLeast<_3, _4, AccountId, CouncilCollective>;
	type WeightInfo = weights::runtime_common_claims::WeightInfo<Runtime>;
}