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 runtime_common::{
	dummy, claims, SlowAdjustingFeeUpdate,
	impls::{CurrencyToVoteHandler, ToAuthor},
	NegativeImbalance, BlockHashCount, MaximumBlockWeight, AvailableBlockRatio,
	MaximumBlockLength, BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight,
	MaximumExtrinsicWeight, purchase, ParachainSessionKeyPlaceholder,
};

use sp_std::prelude::*;
use sp_core::u32_trait::{_1, _2, _3, _4, _5};
use codec::{Encode, Decode};
use primitives::v1::{
	AccountId, AccountIndex, Balance, BlockNumber, Hash, Nonce, Signature, Moment,
};
use primitives::v0 as p_v0;
use sp_runtime::{create_runtime_str, generic, impl_opaque_keys, ModuleId, ApplyExtrinsicResult, KeyTypeId, Percent, Permill, Perbill, transaction_validity::{
	TransactionValidity, TransactionSource, TransactionPriority,
}, curve::PiecewiseLinear, traits::{
	BlakeTwo256, Block as BlockT, OpaqueKeys, ConvertInto, IdentityLookup,
	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, debug, RuntimeDebug,
	traits::{KeyOwnerProofSystem, SplitTwoWays, 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_rpc_runtime_api::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: 24,
	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: 5,
};

/// 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 {
			// Parachains stuff
			Call::DummyParachains(_) | Call::DummyAttestations(_) | Call::DummySlots(_) | Call::DummyRegistrar(_) |
			Call::DummyPurchase(_) =>
				false,

			// 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::FinalityTracker(_) | Call::Grandpa(_) | Call::ImOnline(_) |
			Call::AuthorityDiscovery(_) |
			Call::Utility(_) | Call::Claims(_) | Call::Vesting(_) |
			Call::Identity(_) | Call::Proxy(_) | Call::Multisig(_)
			=> true,
		}
	}
}

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

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

impl frame_system::Trait for Runtime {
	type BaseCallFilter = BaseFilter;
	type Origin = Origin;
	type Call = Call;
	type Index = Nonce;
	type BlockNumber = BlockNumber;
	type Hash = Hash;
	type Hashing = BlakeTwo256;
	type AccountId = AccountId;
	type Lookup = IdentityLookup<AccountId>;
	type Header = generic::Header<BlockNumber, BlakeTwo256>;
	type Event = Event;
	type BlockHashCount = BlockHashCount;
	type MaximumBlockWeight = MaximumBlockWeight;
	type DbWeight = RocksDbWeight;
	type BlockExecutionWeight = BlockExecutionWeight;
	type ExtrinsicBaseWeight = ExtrinsicBaseWeight;
	type MaximumExtrinsicWeight = MaximumExtrinsicWeight;
	type MaximumBlockLength = MaximumBlockLength;
	type AvailableBlockRatio = AvailableBlockRatio;
	type Version = Version;
	type ModuleToIndex = ModuleToIndex;
	type AccountData = pallet_balances::AccountData<Balance>;
	type OnNewAccount = ();
	type OnKilledAccount = ();
	type SystemWeightInfo = weights::frame_system::WeightInfo;
}

impl pallet_scheduler::Trait for Runtime {
	type Event = Event;
	type Origin = Origin;
	type PalletsOrigin = OriginCaller;
	type Call = Call;
	type MaximumWeight = MaximumBlockWeight;
	type ScheduleOrigin = EnsureRoot<AccountId>;
	type WeightInfo = ();
}

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

impl pallet_babe::Trait 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,