lib.rs

// Copyright 2018-2020 Parity Technologies (UK) Ltd.
// This file is part of Substrate.

// Substrate 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.

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

//! The Substrate 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 sp_std::prelude::*;
use frame_support::{
	construct_runtime, parameter_types,
	weights::Weight,
	traits::{SplitTwoWays, Currency, Randomness},
};
use sp_core::u32_trait::{_1, _2, _3, _4};
use node_primitives::{AccountId, AccountIndex, Balance, BlockNumber, Hash, Index, Moment, Signature};
use sp_api::impl_runtime_apis;
use sp_runtime::{Permill, Perbill, ApplyExtrinsicResult, impl_opaque_keys, generic, create_runtime_str};
use sp_runtime::curve::PiecewiseLinear;
use sp_runtime::transaction_validity::TransactionValidity;
use sp_runtime::traits::{
	self, BlakeTwo256, Block as BlockT, NumberFor, StaticLookup, SaturatedConversion,
	OpaqueKeys,
};
use sp_version::RuntimeVersion;
#[cfg(any(feature = "std", test))]
use sp_version::NativeVersion;
use sp_core::OpaqueMetadata;
use pallet_grandpa::AuthorityList as GrandpaAuthorityList;
use pallet_grandpa::fg_primitives;
use pallet_im_online::sr25519::{AuthorityId as ImOnlineId};
use sp_authority_discovery::AuthorityId as AuthorityDiscoveryId;
use pallet_transaction_payment_rpc_runtime_api::RuntimeDispatchInfo;
use pallet_contracts_rpc_runtime_api::ContractExecResult;
use frame_system::offchain::TransactionSubmitter;
use sp_inherents::{InherentData, CheckInherentsResult};

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

/// Implementations of some helper traits passed into runtime modules as associated types.
pub mod impls;
use impls::{CurrencyToVoteHandler, Author, LinearWeightToFee, TargetedFeeAdjustment};

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

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

/// Runtime version.
pub const VERSION: RuntimeVersion = RuntimeVersion {
	spec_name: create_runtime_str!("node"),
	impl_name: create_runtime_str!("substrate-node"),
	authoring_version: 10,
	// Per convention: if the runtime behavior changes, increment spec_version
	// and set impl_version to equal spec_version. If only runtime
	// implementation changes and behavior does not, then leave spec_version as
	// is and increment impl_version.
	spec_version: 198,
	impl_version: 198,
	apis: RUNTIME_API_VERSIONS,
};

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

type NegativeImbalance = <Balances as Currency<AccountId>>::NegativeImbalance;

pub type DealWithFees = SplitTwoWays<
	Balance,
	NegativeImbalance,
	_4, Treasury,   // 4 parts (80%) goes to the treasury.
	_1, Author,     // 1 part (20%) goes to the block author.
>;

parameter_types! {
	pub const BlockHashCount: BlockNumber = 250;
	pub const MaximumBlockWeight: Weight = 1_000_000_000;
	pub const MaximumBlockLength: u32 = 5 * 1024 * 1024;
	pub const Version: RuntimeVersion = VERSION;
	pub const AvailableBlockRatio: Perbill = Perbill::from_percent(75);
}

impl frame_system::Trait for Runtime {
	type Origin = Origin;
	type Call = Call;
	type Index = Index;
	type BlockNumber = BlockNumber;
	type Hash = Hash;
	type Hashing = BlakeTwo256;
	type AccountId = AccountId;
	type Lookup = Indices;
	type Header = generic::Header<BlockNumber, BlakeTwo256>;
	type Event = Event;
	type BlockHashCount = BlockHashCount;
	type MaximumBlockWeight = MaximumBlockWeight;
	type MaximumBlockLength = MaximumBlockLength;
	type AvailableBlockRatio = AvailableBlockRatio;
	type Version = Version;
	type ModuleToIndex = ModuleToIndex;
}

parameter_types! {
	// One storage item; value is size 4+4+16+32 bytes = 56 bytes.
	pub const MultisigDepositBase: Balance = 30 * CENTS;
	// Additional storage item size of 32 bytes.
	pub const MultisigDepositFactor: Balance = 5 * CENTS;
	pub const MaxSignatories: u16 = 100;
}

impl pallet_utility::Trait for Runtime {
	type Event = Event;
	type Call = Call;
	type Currency = Balances;
	type MultisigDepositBase = MultisigDepositBase;
	type MultisigDepositFactor = MultisigDepositFactor;
	type MaxSignatories = MaxSignatories;
}

parameter_types! {
	pub const EpochDuration: u64 = EPOCH_DURATION_IN_SLOTS;
	pub const ExpectedBlockTime: Moment = MILLISECS_PER_BLOCK;
}

impl pallet_babe::Trait for Runtime {
	type EpochDuration = EpochDuration;
	type ExpectedBlockTime = ExpectedBlockTime;
	type EpochChangeTrigger = pallet_babe::ExternalTrigger;
}

impl pallet_indices::Trait for Runtime {
	type AccountIndex = AccountIndex;
	type IsDeadAccount = Balances;
	type ResolveHint = pallet_indices::SimpleResolveHint<Self::AccountId, Self::AccountIndex>;
	type Event = Event;
}

parameter_types! {
	pub const ExistentialDeposit: Balance = 1 * DOLLARS;
	pub const TransferFee: Balance = 1 * CENTS;
	pub const CreationFee: Balance = 1 * CENTS;
}

impl pallet_balances::Trait for Runtime {
	type Balance = Balance;
	type OnFreeBalanceZero = ((Staking, Contracts), Session);
	type OnNewAccount = Indices;
	type Event = Event;
	type DustRemoval = ();
	type TransferPayment = ();
	type ExistentialDeposit = ExistentialDeposit;
	type TransferFee = TransferFee;
	type CreationFee = CreationFee;
}

parameter_types! {
	pub const TransactionBaseFee: Balance = 1 * CENTS;
	pub const TransactionByteFee: Balance = 10 * MILLICENTS;
	// setting this to zero will disable the weight fee.
	pub const WeightFeeCoefficient: Balance = 1_000;
	// for a sane configuration, this should always be less than `AvailableBlockRatio`.
	pub const TargetBlockFullness: Perbill = Perbill::from_percent(25);
}

impl pallet_transaction_payment::Trait for Runtime {
	type Currency = Balances;
	type OnTransactionPayment = DealWithFees;
	type TransactionBaseFee = TransactionBaseFee;
	type TransactionByteFee = TransactionByteFee;
	type WeightToFee = LinearWeightToFee<WeightFeeCoefficient>;
	type FeeMultiplierUpdate = TargetedFeeAdjustment<TargetBlockFullness>;
}

parameter_types! {
	pub const MinimumPeriod: Moment = SLOT_DURATION / 2;
}
impl pallet_timestamp::Trait for Runtime {
	type Moment = Moment;
	type OnTimestampSet = Babe;
	type MinimumPeriod = MinimumPeriod;
}

parameter_types! {
	pub const UncleGenerations: BlockNumber = 5;
}

impl pallet_authorship::Trait 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 authority_discovery: AuthorityDiscovery,
	}
}

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

impl pallet_session::Trait for Runtime {
	type OnSessionEnding = Staking;
	type SessionHandler = <SessionKeys as OpaqueKeys>::KeyTypeIdProviders;
	type ShouldEndSession = Babe;
	type Event = Event;
	type Keys = SessionKeys;
	type ValidatorId = <Self as frame_system::Trait>::AccountId;
	type ValidatorIdOf = pallet_staking::StashOf<Self>;
	type SelectInitialValidators = Staking;
	type DisabledValidatorsThreshold = DisabledValidatorsThreshold;
}

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

pallet_staking_reward_curve::build! {
	const REWARD_CURVE: PiecewiseLinear<'static> = curve!(
		min_inflation: 0_025_000,
		max_inflation: 0_100_000,
		ideal_stake: 0_500_000,
		falloff: 0_050_000,
		max_piece_count: 40,
		test_precision: 0_005_000,
	);
}

parameter_types! {
	pub const SessionsPerEra: sp_staking::SessionIndex = 6;
	pub const BondingDuration: pallet_staking::EraIndex = 24 * 28;
	pub const SlashDeferDuration: pallet_staking::EraIndex = 24 * 7; // 1/4 the bonding duration.
	pub const RewardCurve: &'static PiecewiseLinear<'static> = &REWARD_CURVE;
}

impl pallet_staking::Trait for Runtime {
	type Currency = Balances;
	type Time = Timestamp;
	type CurrencyToVote = CurrencyToVoteHandler;
	type RewardRemainder = Treasury;
	type Event = Event;
	type Slash = Treasury; // send the slashed funds to the treasury.
	type Reward = (); // rewards are minted from the void
	type SessionsPerEra = SessionsPerEra;
	type BondingDuration = BondingDuration;
	type SlashDeferDuration = SlashDeferDuration;
	/// A super-majority of the council can cancel the slash.
	type SlashCancelOrigin = pallet_collective::EnsureProportionAtLeast<_3, _4, AccountId, CouncilCollective>;
	type SessionInterface = Self;
	type RewardCurve = RewardCurve;
}

parameter_types! {
	pub const LaunchPeriod: BlockNumber = 28 * 24 * 60 * MINUTES;
	pub const VotingPeriod: BlockNumber = 28 * 24 * 60 * MINUTES;
	pub const EmergencyVotingPeriod: BlockNumber = 3 * 24 * 60 * MINUTES;
	pub const MinimumDeposit: Balance = 100 * DOLLARS;
	pub const EnactmentPeriod: BlockNumber = 30 * 24 * 60 * MINUTES;
	pub const CooloffPeriod: BlockNumber = 28 * 24 * 60 * MINUTES;
	// One cent: $10,000 / MB
	pub const PreimageByteDeposit: Balance = 1 * CENTS;
}

impl pallet_democracy::Trait for Runtime {
	type Proposal = Call;
	type Event = Event;
	type Currency = Balances;
	type EnactmentPeriod = EnactmentPeriod;
	type LaunchPeriod = LaunchPeriod;
	type VotingPeriod = VotingPeriod;
	type EmergencyVotingPeriod = EmergencyVotingPeriod;
	type MinimumDeposit = MinimumDeposit;
	/// A straight majority of the council can decide what their next motion is.
	type ExternalOrigin = pallet_collective::EnsureProportionAtLeast<_1, _2, AccountId, CouncilCollective>;
	/// A super-majority can have the next scheduled referendum be a straight majority-carries vote.
	type ExternalMajorityOrigin = pallet_collective::EnsureProportionAtLeast<_3, _4, AccountId, CouncilCollective>;
	/// A unanimous council can have the next scheduled referendum be a straight default-carries
	/// (NTB) vote.
	type ExternalDefaultOrigin = pallet_collective::EnsureProportionAtLeast<_1, _1, AccountId, CouncilCollective>;
	/// Two thirds of the technical committee can have an ExternalMajority/ExternalDefault vote
	/// be tabled immediately and with a shorter voting/enactment period.
	type FastTrackOrigin = pallet_collective::EnsureProportionAtLeast<_2, _3, AccountId, TechnicalCollective>;
	// To cancel a proposal which has been passed, 2/3 of the council must agree to it.
	type CancellationOrigin = pallet_collective::EnsureProportionAtLeast<_2, _3, AccountId, CouncilCollective>;
	// 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 Slash = Treasury;
}

type CouncilCollective = pallet_collective::Instance1;
impl pallet_collective::Trait<CouncilCollective> for Runtime {
	type Origin = Origin;
	type Proposal = Call;
	type Event = Event;
}

parameter_types! {
	pub const CandidacyBond: Balance = 10 * DOLLARS;
	pub const VotingBond: Balance = 1 * DOLLARS;
	pub const TermDuration: BlockNumber = 7 * DAYS;
	pub const DesiredMembers: u32 = 13;
	pub const DesiredRunnersUp: u32 = 7;
}

impl pallet_elections_phragmen::Trait for Runtime {
	type Event = Event;
	type Currency = Balances;
	type CurrencyToVote = CurrencyToVoteHandler;
	type CandidacyBond = CandidacyBond;
	type VotingBond = VotingBond;
	type TermDuration = TermDuration;
	type DesiredMembers = DesiredMembers;
	type DesiredRunnersUp = DesiredRunnersUp;
	type LoserCandidate = ();
	type BadReport = ();
	type KickedMember = ();
	type ChangeMembers = Council;
}

type TechnicalCollective = pallet_collective::Instance2;
impl pallet_collective::Trait<TechnicalCollective> for Runtime {
	type Origin = Origin;
	type Proposal = Call;
	type Event = Event;
}

impl pallet_membership::Trait<pallet_membership::Instance1> for Runtime {
	type Event = Event;
	type AddOrigin = pallet_collective::EnsureProportionMoreThan<_1, _2, AccountId, CouncilCollective>;
	type RemoveOrigin = pallet_collective::EnsureProportionMoreThan<_1, _2, AccountId, CouncilCollective>;
	type SwapOrigin = pallet_collective::EnsureProportionMoreThan<_1, _2, AccountId, CouncilCollective>;
	type ResetOrigin = pallet_collective::EnsureProportionMoreThan<_1, _2, AccountId, CouncilCollective>;
	type MembershipInitialized = TechnicalCommittee;
	type MembershipChanged = TechnicalCommittee;
}

parameter_types! {
	pub const ProposalBond: Permill = Permill::from_percent(5);
	pub const ProposalBondMinimum: Balance = 1 * DOLLARS;
	pub const SpendPeriod: BlockNumber = 1 * DAYS;
	pub const Burn: Permill = Permill::from_percent(50);
}

impl pallet_treasury::Trait for Runtime {
	type Currency = Balances;
	type ApproveOrigin = pallet_collective::EnsureMembers<_4, AccountId, CouncilCollective>;
	type RejectOrigin = pallet_collective::EnsureMembers<_2, AccountId, CouncilCollective>;
	type Event = Event;
	type ProposalRejection = ();
	type ProposalBond = ProposalBond;
	type ProposalBondMinimum = ProposalBondMinimum;
	type SpendPeriod = SpendPeriod;
	type Burn = Burn;
}

parameter_types! {
	pub const ContractTransferFee: Balance = 1 * CENTS;
	pub const ContractCreationFee: Balance = 1 * CENTS;
	pub const ContractTransactionBaseFee: Balance = 1 * CENTS;
	pub const ContractTransactionByteFee: Balance = 10 * MILLICENTS;
	pub const ContractFee: Balance = 1 * CENTS;
	pub const TombstoneDeposit: Balance = 1 * DOLLARS;
	pub const RentByteFee: Balance = 1 * DOLLARS;
	pub const RentDepositOffset: Balance = 1000 * DOLLARS;
	pub const SurchargeReward: Balance = 150 * DOLLARS;
}

impl pallet_contracts::Trait for Runtime {
	type Currency = Balances;
	type Time = Timestamp;
	type Randomness = RandomnessCollectiveFlip;
	type Call = Call;
	type Event = Event;
	type DetermineContractAddress = pallet_contracts::SimpleAddressDeterminator<Runtime>;
	type ComputeDispatchFee = pallet_contracts::DefaultDispatchFeeComputor<Runtime>;
	type TrieIdGenerator = pallet_contracts::TrieIdFromParentCounter<Runtime>;
	type GasPayment = ();
	type RentPayment = ();
	type SignedClaimHandicap = pallet_contracts::DefaultSignedClaimHandicap;
	type TombstoneDeposit = TombstoneDeposit;
	type StorageSizeOffset = pallet_contracts::DefaultStorageSizeOffset;
	type RentByteFee = RentByteFee;
	type RentDepositOffset = RentDepositOffset;
	type SurchargeReward = SurchargeReward;
	type TransferFee = ContractTransferFee;
	type CreationFee = ContractCreationFee;
	type TransactionBaseFee = ContractTransactionBaseFee;
	type TransactionByteFee = ContractTransactionByteFee;
	type ContractFee = ContractFee;
	type CallBaseFee = pallet_contracts::DefaultCallBaseFee;
	type InstantiateBaseFee = pallet_contracts::DefaultInstantiateBaseFee;
	type MaxDepth = pallet_contracts::DefaultMaxDepth;
	type MaxValueSize = pallet_contracts::DefaultMaxValueSize;
	type BlockGasLimit = pallet_contracts::DefaultBlockGasLimit;
}

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

type SubmitTransaction = TransactionSubmitter<ImOnlineId, Runtime, UncheckedExtrinsic>;

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

impl pallet_im_online::Trait for Runtime {
	type AuthorityId = ImOnlineId;
	type Call = Call;
	type Event = Event;
	type SubmitTransaction = SubmitTransaction;
	type ReportUnresponsiveness = Offences;
	type SessionDuration = SessionDuration;
}

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

impl pallet_authority_discovery::Trait for Runtime {}

impl pallet_grandpa::Trait for Runtime {
	type Event = Event;
}

parameter_types! {
	pub const WindowSize: BlockNumber = 101;
	pub const ReportLatency: BlockNumber = 1000;
}

impl pallet_finality_tracker::Trait for Runtime {
	type OnFinalizationStalled = Grandpa;
	type WindowSize = WindowSize;
	type ReportLatency = ReportLatency;
}

parameter_types! {
	pub const ReservationFee: Balance = 1 * DOLLARS;
	pub const MinLength: usize = 3;
	pub const MaxLength: usize = 16;
}

impl pallet_nicks::Trait for Runtime {
	type Event = Event;
	type Currency = Balances;
	type ReservationFee = ReservationFee;
	type Slashed = Treasury;
	type ForceOrigin = pallet_collective::EnsureMember<AccountId, CouncilCollective>;
	type MinLength = MinLength;
	type MaxLength = MaxLength;
}

impl frame_system::offchain::CreateTransaction<Runtime, UncheckedExtrinsic> for Runtime {
	type Public = <Signature as traits::Verify>::Signer;
	type Signature = Signature;

	fn create_transaction<TSigner: frame_system::offchain::Signer<Self::Public, Self::Signature>>(
		call: Call,
		public: Self::Public,
		account: AccountId,
		index: Index,
	) -> Option<(Call, <UncheckedExtrinsic as traits::Extrinsic>::SignaturePayload)> {
		// 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>();
		let tip = 0;
		let extra: SignedExtra = (
			frame_system::CheckVersion::<Runtime>::new(),
			frame_system::CheckGenesis::<Runtime>::new(),
			frame_system::CheckEra::<Runtime>::from(generic::Era::mortal(period, current_block)),
			frame_system::CheckNonce::<Runtime>::from(index),
			frame_system::CheckWeight::<Runtime>::new(),
			pallet_transaction_payment::ChargeTransactionPayment::<Runtime>::from(tip),
			Default::default(),
		);
		let raw_payload = SignedPayload::new(call, extra).ok()?;
		let signature = TSigner::sign(public, &raw_payload)?;
		let address = Indices::unlookup(account);
		let (call, extra, _) = raw_payload.deconstruct();
		Some((call, (address, signature, extra)))
	}
}

construct_runtime!(
	pub enum Runtime where
		Block = Block,
		NodeBlock = node_primitives::Block,
		UncheckedExtrinsic = UncheckedExtrinsic
	{
		System: frame_system::{Module, Call, Storage, Config, Event},
		Utility: pallet_utility::{Module, Call, Storage, Event<T>},
		Babe: pallet_babe::{Module, Call, Storage, Config, Inherent(Timestamp)},
		Timestamp: pallet_timestamp::{Module, Call, Storage, Inherent},
		Authorship: pallet_authorship::{Module, Call, Storage, Inherent},
		Indices: pallet_indices,
		Balances: pallet_balances,
		TransactionPayment: pallet_transaction_payment::{Module, Storage},
		Staking: pallet_staking,
		Session: pallet_session::{Module, Call, Storage, Event, Config<T>},
		Democracy: pallet_democracy::{Module, Call, Storage, Config, Event<T>},
		Council: pallet_collective::<Instance1>::{Module, Call, Storage, Origin<T>, Event<T>, Config<T>},
		TechnicalCommittee: pallet_collective::<Instance2>::{Module, Call, Storage, Origin<T>, Event<T>, Config<T>},
		Elections: pallet_elections_phragmen::{Module, Call, Storage, Event<T>},
		TechnicalMembership: pallet_membership::<Instance1>::{Module, Call, Storage, Event<T>, Config<T>},
		FinalityTracker: pallet_finality_tracker::{Module, Call, Inherent},
		Grandpa: pallet_grandpa::{Module, Call, Storage, Config, Event},
		Treasury: pallet_treasury::{Module, Call, Storage, Config, Event<T>},
		Contracts: pallet_contracts,
		Sudo: pallet_sudo,
		ImOnline: pallet_im_online::{Module, Call, Storage, Event<T>, ValidateUnsigned, Config<T>},
		AuthorityDiscovery: pallet_authority_discovery::{Module, Call, Config},
		Offences: pallet_offences::{Module, Call, Storage, Event},
		RandomnessCollectiveFlip: pallet_randomness_collective_flip::{Module, Call, Storage},
		Nicks: pallet_nicks::{Module, Call, Storage, Event<T>},
	}
);

/// The address format for describing accounts.
pub type Address = <Indices as StaticLookup>::Source;
/// 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::CheckVersion<Runtime>,
	frame_system::CheckGenesis<Runtime>,
	frame_system::CheckEra<Runtime>,
	frame_system::CheckNonce<Runtime>,
	frame_system::CheckWeight<Runtime>,
	pallet_transaction_payment::ChargeTransactionPayment<Runtime>,
	pallet_contracts::CheckBlockGasLimit<Runtime>,
);
/// Unchecked extrinsic type as expected by this runtime.
pub type UncheckedExtrinsic = generic::UncheckedExtrinsic<Address, Call, Signature, SignedExtra>;
/// The payload being signed in transactions.
pub type SignedPayload = generic::SignedPayload<Call, 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: InherentData) -> Vec<<Block as BlockT>::Extrinsic> {
			data.create_extrinsics()
		}

		fn check_inherents(block: Block, data: InherentData) -> 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(tx: <Block as BlockT>::Extrinsic) -> TransactionValidity {
			Executive::validate_transaction(tx)
		}
	}

	impl sp_offchain::OffchainWorkerApi<Block> for Runtime {
		fn offchain_worker(number: NumberFor<Block>) {
			Executive::offchain_worker(number)
		}
	}

	impl fg_primitives::GrandpaApi<Block> for Runtime {
		fn grandpa_authorities() -> GrandpaAuthorityList {
			Grandpa::grandpa_authorities()
		}
	}

	impl sp_consensus_babe::BabeApi<Block> for Runtime {
		fn configuration() -> sp_consensus_babe::BabeConfiguration {
			// The choice of `c` parameter (where `1 - c` represents the
			// probability of a slot being empty), is done in accordance to the
			// slot duration and expected target block time, for safely
			// resisting network delays of maximum two seconds.
			// <https://research.web3.foundation/en/latest/polkadot/BABE/Babe/#6-practical-results>
			sp_consensus_babe::BabeConfiguration {
				slot_duration: Babe::slot_duration(),
				epoch_length: EpochDuration::get(),
				c: PRIMARY_PROBABILITY,
				genesis_authorities: Babe::authorities(),
				randomness: Babe::randomness(),
				secondary_slots: true,
			}
		}
	}

	impl sp_authority_discovery::AuthorityDiscoveryApi<Block> for Runtime {
		fn authorities() -> Vec<AuthorityDiscoveryId> {
			AuthorityDiscovery::authorities()
		}
	}

	impl frame_system_rpc_runtime_api::AccountNonceApi<Block, AccountId, Index> for Runtime {
		fn account_nonce(account: AccountId) -> Index {
			System::account_nonce(account)
		}
	}

	impl pallet_contracts_rpc_runtime_api::ContractsApi<Block, AccountId, Balance> for Runtime {
		fn call(
			origin: AccountId,
			dest: AccountId,
			value: Balance,
			gas_limit: u64,
			input_data: Vec<u8>,
		) -> ContractExecResult {
			let exec_result = Contracts::bare_call(
				origin,
				dest.into(),
				value,
				gas_limit,
				input_data,
			);
			match exec_result {
				Ok(v) => ContractExecResult::Success {
					status: v.status,
					data: v.data,
				},
				Err(_) => ContractExecResult::Error,
			}
		}

		fn get_storage(
			address: AccountId,
			key: [u8; 32],
		) -> pallet_contracts_rpc_runtime_api::GetStorageResult {
			Contracts::get_storage(address, key).map_err(|rpc_err| {
				use pallet_contracts::GetStorageError;
				use pallet_contracts_rpc_runtime_api::{GetStorageError as RpcGetStorageError};
				/// Map the contract error into the RPC layer error.
				match rpc_err {
					GetStorageError::ContractDoesntExist => RpcGetStorageError::ContractDoesntExist,
					GetStorageError::IsTombstone => RpcGetStorageError::IsTombstone,
				}
			})
		}
	}

	impl pallet_transaction_payment_rpc_runtime_api::TransactionPaymentApi<
		Block,
		Balance,
		UncheckedExtrinsic,
	> for Runtime {
		fn query_info(uxt: UncheckedExtrinsic, len: u32) -> RuntimeDispatchInfo<Balance> {
			TransactionPayment::query_info(uxt, len)
		}
	}

	impl sp_session::SessionKeys<Block> for Runtime {
		fn generate_session_keys(seed: Option<Vec<u8>>) -> Vec<u8> {
			SessionKeys::generate(seed)
		}
	}
}

#[cfg(test)]
mod tests {
	use super::*;
	use frame_system::offchain::SubmitSignedTransaction;

	fn is_submit_signed_transaction<T>(_arg: T) where
		T: SubmitSignedTransaction<
			Runtime,
			Call,
			Extrinsic=UncheckedExtrinsic,
			CreateTransaction=Runtime,
			Signer=ImOnlineId,
		>,
	{}

	#[test]
	fn validate_bounds() {
		let x = SubmitTransaction::default();
		is_submit_signed_transaction(x);
	}

	#[test]
	fn block_hooks_weight_should_not_exceed_limits() {
		use frame_support::weights::WeighBlock;
		let check_for_block = |b| {
			let block_hooks_weight =
				<AllModules as WeighBlock<BlockNumber>>::on_initialize(b) +
				<AllModules as WeighBlock<BlockNumber>>::on_finalize(b);

			assert_eq!(
				block_hooks_weight,
				0,
				"This test might fail simply because the value being compared to has increased to a \
				module declaring a new weight for a hook or call. In this case update the test and \
				happily move on.",
			);

			// Invariant. Always must be like this to have a sane chain.
			assert!(block_hooks_weight < MaximumBlockWeight::get());

			// Warning.
			if block_hooks_weight > MaximumBlockWeight::get() / 2 {
				println!(
					"block hooks weight is consuming more than a block's capacity. You probably want \
					to re-think this. This test will fail now."
				);
				assert!(false);
			}
		};

		let _ = (0..100_000).for_each(check_for_block);
	}
}