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 codec::{Encode, Decode};
use primitives::{
	AccountId, AccountIndex, Balance, BlockNumber, Hash, Nonce, Signature, Moment,
	parachain::{self, ActiveParas, AbridgedCandidateReceipt, SigningContext},
};
use runtime_common::{
	attestations, parachains, registrar, SlowAdjustingFeeUpdate,
	impls::{CurrencyToVoteHandler, ToAuthor},
	BlockHashCount, MaximumBlockWeight, AvailableBlockRatio, MaximumBlockLength,
	BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight, MaximumExtrinsicWeight,
};
use sp_runtime::{
	create_runtime_str, generic, impl_opaque_keys,
	ApplyExtrinsicResult, KeyTypeId, Perbill, curve::PiecewiseLinear,
	transaction_validity::{TransactionValidity, TransactionSource, TransactionPriority},
	traits::{
		BlakeTwo256, Block as BlockT, OpaqueKeys, ConvertInto, IdentityLookup,
		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, RuntimeDebug,
	traits::{KeyOwnerProofSystem, Randomness, Filter, InstanceFilter},
	weights::Weight,
};
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!("westend"),
	impl_name: create_runtime_str!("parity-westend"),
	authoring_version: 2,
	spec_version: 33,
	impl_version: 0,
	apis: RUNTIME_API_VERSIONS,
	transaction_version: 2,
};

/// 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.
pub struct BaseFilter;
impl Filter<Call> for BaseFilter {
	fn filter(call: &Call) -> bool {
		!matches!(call, Call::Registrar(_))
	}
}

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

impl 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<Self::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 = 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;
}

impl balances::Trait for Runtime {
	type Balance = Balance;
	type DustRemoval = ();
	type Event = Event;
	type ExistentialDeposit = ExistentialDeposit;
	type AccountStore = System;
}

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

impl transaction_payment::Trait for Runtime {
	type Currency = Balances;
	type OnTransactionPayment = ToAuthor<Runtime>;
	type TransactionByteFee = TransactionByteFee;
	type WeightToFee = WeightToFee;
	type FeeMultiplierUpdate = SlowAdjustingFeeUpdate<Self>;
}

parameter_types! {
	pub const MinimumPeriod: u64 = SLOT_DURATION / 2;
}
impl timestamp::Trait for Runtime {
	type Moment = u64;
	type OnTimestampSet = Babe;
	type MinimumPeriod = MinimumPeriod;
}