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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/>.
/// Money matters.
pub mod currency {
use primitives::Balance;
pub const DOTS: Balance = 1_000_000_000_000;
pub const DOLLARS: Balance = DOTS;
pub const CENTS: Balance = DOLLARS / 100;
pub const MILLICENTS: Balance = CENTS / 1_000;
}
/// Time and blocks.
pub mod time {
use primitives::{Moment, BlockNumber};
pub const MILLISECS_PER_BLOCK: Moment = 6000;
pub const SLOT_DURATION: Moment = MILLISECS_PER_BLOCK;
pub const EPOCH_DURATION_IN_BLOCKS: BlockNumber = 1 * HOURS;
// These time units are defined in number of blocks.
pub const MINUTES: BlockNumber = 60_000 / (MILLISECS_PER_BLOCK as BlockNumber);
pub const HOURS: BlockNumber = MINUTES * 60;
pub const DAYS: BlockNumber = HOURS * 24;
// 1 in 4 blocks (on average, not counting collisions) will be primary babe blocks.
pub const PRIMARY_PROBABILITY: (u64, u64) = (1, 4);
}
/// Fee-related.
pub mod fee {
pub use sp_runtime::Perbill;
use primitives::Balance;
use frame_support::weights::Weight;
use sp_runtime::traits::Convert;
/// The block saturation level. Fees will be updates based on this value.
pub const TARGET_BLOCK_FULLNESS: Perbill = Perbill::from_percent(25);
/// Handles converting a weight scalar to a fee value, based on the scale and granularity of the
/// node's balance type.
///
/// This should typically create a mapping between the following ranges:
/// - [0, system::MaximumBlockWeight]
/// - [Balance::min, Balance::max]
///
/// Yet, it can be used for any other sort of change to weight-fee. Some examples being:
/// - Setting it to `0` will essentially disable the weight fee.
/// - Setting it to `1` will cause the literal `#[weight = x]` values to be charged.
pub struct WeightToFee;
impl Convert<Weight, Balance> for WeightToFee {
fn convert(x: Weight) -> Balance {
// in Kusama a weight of 10_000 (smallest non-zero weight) is mapped to 1/10 CENT:
Balance::from(x).saturating_mul(super::currency::CENTS / (10 * 10_000))
}
}
}