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// Copyright 2019-2020 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/>.
//! Common runtime code for Polkadot and Kusama.
#![cfg_attr(not(feature = "std"), no_std)]
pub mod attestations;
pub mod claims;
pub mod parachains;
pub mod slot_range;
pub mod registrar;
pub mod slots;
pub mod crowdfund;
use sp_runtime::{Perquintill, Perbill, FixedPointNumber, traits::Saturating};
thiolliere
committed
parameter_types, traits::{Currency},
weights::{Weight, constants::WEIGHT_PER_SECOND},
use transaction_payment::{TargetedFeeAdjustment, Multiplier};
use static_assertions::const_assert;
pub use frame_support::weights::constants::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight};
#[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;
/// Implementations of some helper traits passed into runtime modules as associated types.
pub use impls::{CurrencyToVoteHandler, ToAuthor};
pub type NegativeImbalance<T> = <balances::Module<T> as Currency<<T as system::Trait>::AccountId>>::NegativeImbalance;
/// We assume that an on-initialize consumes 10% of the weight on average, hence a single extrinsic
/// will not be allowed to consume more than `AvailableBlockRatio - 10%`.
const AVERAGE_ON_INITIALIZE_WEIGHT: Perbill = Perbill::from_percent(10);
// Common constants used in all runtimes.
pub const BlockHashCount: BlockNumber = 2400;
/// Block time that can be used by weights.
pub const MaximumBlockWeight: Weight = 2 * WEIGHT_PER_SECOND;
/// Portion of the block available to normal class of dispatches.
pub const AvailableBlockRatio: Perbill = Perbill::from_percent(75);
/// Maximum weight that a _single_ extrinsic can take.
pub MaximumExtrinsicWeight: Weight = AvailableBlockRatio::get()
.saturating_sub(AVERAGE_ON_INITIALIZE_WEIGHT) * MaximumBlockWeight::get();
/// Maximum length of block. 5MB.
pub const MaximumBlockLength: u32 = 5 * 1024 * 1024;
/// The portion of the `AvailableBlockRatio` that we adjust the fees with. Blocks filled less
/// than this will decrease the weight and more will increase.
pub const TargetBlockFullness: Perquintill = Perquintill::from_percent(25);
/// The adjustment variable of the runtime. Higher values will cause `TargetBlockFullness` to
/// change the fees more rapidly.
pub AdjustmentVariable: Multiplier = Multiplier::saturating_from_rational(3, 100_000);
/// Minimum amount of the multiplier. This value cannot be too low. A test case should ensure
/// that combined with `AdjustmentVariable`, we can recover from the minimum.
/// See `multiplier_can_grow_from_zero`.
pub MinimumMultiplier: Multiplier = Multiplier::saturating_from_rational(1, 1_000_000_000u128);
const_assert!(AvailableBlockRatio::get().deconstruct() >= AVERAGE_ON_INITIALIZE_WEIGHT.deconstruct());
/// Parameterized slow adjusting fee updated based on
/// https://w3f-research.readthedocs.io/en/latest/polkadot/Token%20Economics.html#-2.-slow-adjusting-mechanism
pub type SlowAdjustingFeeUpdate<R> = TargetedFeeAdjustment<
R,
TargetBlockFullness,
AdjustmentVariable,
MinimumMultiplier
>;
#[cfg(test)]
mod multiplier_tests {
use super::*;
use frame_support::{impl_outer_origin, parameter_types, weights::Weight};
use sp_core::H256;
use sp_runtime::{
testing::Header,
traits::{BlakeTwo256, IdentityLookup, Convert},
Perbill,
};
#[derive(Clone, PartialEq, Eq, Debug)]
pub struct Runtime;
impl_outer_origin!{
pub enum Origin for Runtime where system = system {}
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}
parameter_types! {
pub const BlockHashCount: u64 = 250;
pub const ExtrinsicBaseWeight: u64 = 100;
pub const MaximumBlockWeight: Weight = 1024;
pub const MaximumBlockLength: u32 = 2 * 1024;
pub const AvailableBlockRatio: Perbill = Perbill::one();
}
impl system::Trait for Runtime {
type BaseCallFilter = ();
type Origin = Origin;
type Index = u64;
type BlockNumber = u64;
type Call = ();
type Hash = H256;
type Hashing = BlakeTwo256;
type AccountId = u64;
type Lookup = IdentityLookup<Self::AccountId>;
type Header = Header;
type Event = ();
type BlockHashCount = BlockHashCount;
type MaximumBlockWeight = MaximumBlockWeight;
type DbWeight = ();
type BlockExecutionWeight = ();
type ExtrinsicBaseWeight = ExtrinsicBaseWeight;
type MaximumExtrinsicWeight = MaximumBlockWeight;
type MaximumBlockLength = MaximumBlockLength;
type AvailableBlockRatio = AvailableBlockRatio;
type Version = ();
type ModuleToIndex = ();
type AccountData = ();
type OnNewAccount = ();
type OnKilledAccount = ();
type SystemWeightInfo = ();
}
type System = system::Module<Runtime>;
fn run_with_system_weight<F>(w: Weight, assertions: F) where F: Fn() -> () {
let mut t: sp_io::TestExternalities =
system::GenesisConfig::default().build_storage::<Runtime>().unwrap().into();
t.execute_with(|| {
System::set_block_limits(w, 0);
assertions()
});
}
#[test]
fn multiplier_can_grow_from_zero() {
let minimum_multiplier = MinimumMultiplier::get();
let target = TargetBlockFullness::get() * (AvailableBlockRatio::get() * MaximumBlockWeight::get());
// if the min is too small, then this will not change, and we are doomed forever.
// the weight is 1/10th bigger than target.
run_with_system_weight(target * 101 / 100, || {
let next = SlowAdjustingFeeUpdate::<Runtime>::convert(minimum_multiplier);
assert!(next > minimum_multiplier, "{:?} !>= {:?}", next, minimum_multiplier);
})
}
}