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 sp_std::prelude::*;
use sp_core::u32_trait::{_1, _2, _3, _4, _5};
use codec::{Encode, Decode};
use primitives::{
	AccountId, AccountIndex, Balance, BlockNumber, Hash, Nonce, Signature, Moment,
	parachain::{self, ActiveParas, AbridgedCandidateReceipt, SigningContext}, ValidityError,
};
use runtime_common::{attestations, claims, parachains, registrar, slots,
	impls::{CurrencyToVoteHandler, TargetedFeeAdjustment, ToAuthor},
	NegativeImbalance, BlockHashCount, MaximumBlockWeight, AvailableBlockRatio,
	MaximumBlockLength, BlockExecutionWeight, ExtrinsicBaseWeight,
};
use sp_runtime::{
	create_runtime_str, generic, impl_opaque_keys, ModuleId,
	ApplyExtrinsicResult, KeyTypeId, Percent, Permill, Perbill, Perquintill, RuntimeDebug,
	transaction_validity::{
		TransactionValidity, InvalidTransaction, TransactionValidityError, TransactionSource, TransactionPriority,
	},
	curve::PiecewiseLinear,
	traits::{
		BlakeTwo256, Block as BlockT, SignedExtension, OpaqueKeys, ConvertInto, IdentityLookup,
		DispatchInfoOf, Extrinsic as ExtrinsicT, SaturatedConversion, Verify,
	},
};
#[cfg(feature = "runtime-benchmarks")]
use sp_runtime::RuntimeString;
use version::RuntimeVersion;
use grandpa::{AuthorityId as GrandpaId, fg_primitives};
#[cfg(any(feature = "std", test))]
use version::NativeVersion;
use sp_core::OpaqueMetadata;
use sp_staking::SessionIndex;
use frame_support::{
	parameter_types, construct_runtime, debug,
	traits::{KeyOwnerProofSystem, SplitTwoWays, Randomness, LockIdentifier},
  weights::RuntimeDbWeight,
};
use im_online::sr25519::AuthorityId as ImOnlineId;
use authority_discovery_primitives::AuthorityId as AuthorityDiscoveryId;
use transaction_payment_rpc_runtime_api::RuntimeDispatchInfo;
use session::{historical as session_historical};

#[cfg(feature = "std")]
pub use staking::StakerStatus;
#[cfg(any(feature = "std", test))]
pub use sp_runtime::BuildStorage;
pub use timestamp::Call as TimestampCall;
pub use balances::Call as BalancesCall;
pub use attestations::{Call as AttestationsCall, MORE_ATTESTATIONS_IDENTIFIER};
pub use parachains::Call as ParachainsCall;

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

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

/// Runtime version (Kusama).
pub const VERSION: RuntimeVersion = RuntimeVersion {
	spec_name: create_runtime_str!("kusama"),
	impl_name: create_runtime_str!("parity-kusama"),
	authoring_version: 2,
	spec_version: 1061,
	impl_version: 0,
	apis: RUNTIME_API_VERSIONS,
	transaction_version: 1,
};

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

/// Avoid processing transactions from slots and parachain registrar.
#[derive(Default, Encode, Decode, Clone, Eq, PartialEq, RuntimeDebug)]
pub struct RestrictFunctionality;
impl SignedExtension for RestrictFunctionality {
	const IDENTIFIER: &'static str = "RestrictFunctionality";
	type AccountId = AccountId;
	type Call = Call;
	type AdditionalSigned = ();
	type Pre = ();

	fn additional_signed(&self) -> sp_std::result::Result<(), TransactionValidityError> { Ok(()) }

	fn validate(
		&self,
		_: &Self::AccountId,
		call: &Self::Call,
		_: &DispatchInfoOf<Self::Call>,
		_: usize
	)
		-> TransactionValidity
	{
		match call {
			Call::Slots(_) | Call::Registrar(_)
				=> Err(InvalidTransaction::Custom(ValidityError::NoPermission.into()).into()),
			_ => Ok(Default::default()),
		}
	}
}

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

parameter_types! {
	pub const DbWeight: RuntimeDbWeight = RuntimeDbWeight {
		read: 60_000_000,
		write: 200_000_000,
	};
}

impl system::Trait for Runtime {
	type Origin = Origin;
	type Call = Call;
	type Index = Nonce;
	type BlockNumber = BlockNumber;
	type Hash = Hash;
	type Hashing = BlakeTwo256;
	type AccountId = AccountId;
	type Lookup = IdentityLookup<Self::AccountId>;
	type Header = generic::Header<BlockNumber, BlakeTwo256>;
	type Event = Event;
	type BlockHashCount = BlockHashCount;
	type MaximumBlockWeight = MaximumBlockWeight;
	type DbWeight = DbWeight;
	type BlockExecutionWeight = BlockExecutionWeight;
	type ExtrinsicBaseWeight = ExtrinsicBaseWeight;
	type MaximumBlockLength = MaximumBlockLength;
	type AvailableBlockRatio = AvailableBlockRatio;
	type Version = Version;
	type ModuleToIndex = ModuleToIndex;
	type AccountData = balances::AccountData<Balance>;
	type OnNewAccount = ();
	type OnKilledAccount = ();
}

impl scheduler::Trait for Runtime {
	type Event = Event;
	type Origin = Origin;
	type Call = Call;
	type MaximumWeight = MaximumBlockWeight;
}

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

impl babe::Trait for Runtime {
	type EpochDuration = EpochDuration;
	type ExpectedBlockTime = ExpectedBlockTime;

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

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

impl indices::Trait for Runtime {
	type AccountIndex = AccountIndex;
	type Currency = Balances;
	type Deposit = IndexDeposit;
	type Event = Event;
}

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