rococo_runtime_constants/
lib.rs

1// Copyright (C) Parity Technologies (UK) Ltd.
2// This file is part of Polkadot.
3
4// Polkadot is free software: you can redistribute it and/or modify
5// it under the terms of the GNU General Public License as published by
6// the Free Software Foundation, either version 3 of the License, or
7// (at your option) any later version.
8
9// Polkadot is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12// GNU General Public License for more details.
13
14// You should have received a copy of the GNU General Public License
15// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
16
17#![cfg_attr(not(feature = "std"), no_std)]
18
19pub mod weights;
20
21/// Money matters.
22pub mod currency {
23	use polkadot_primitives::Balance;
24
25	/// The existential deposit.
26	pub const EXISTENTIAL_DEPOSIT: Balance = 1 * CENTS;
27
28	pub const UNITS: Balance = 1_000_000_000_000;
29	pub const CENTS: Balance = UNITS / 30_000;
30	pub const GRAND: Balance = CENTS * 100_000;
31	pub const MILLICENTS: Balance = CENTS / 1_000;
32
33	pub const fn deposit(items: u32, bytes: u32) -> Balance {
34		items as Balance * 2_000 * CENTS + (bytes as Balance) * 100 * MILLICENTS
35	}
36}
37
38/// Time and blocks.
39pub mod time {
40	use polkadot_runtime_common::prod_or_fast;
41
42	use polkadot_primitives::{BlockNumber, Moment};
43	pub const MILLISECS_PER_BLOCK: Moment = 6000;
44	pub const SLOT_DURATION: Moment = MILLISECS_PER_BLOCK;
45
46	frame_support::parameter_types! {
47		pub EpochDurationInBlocks: BlockNumber =
48			prod_or_fast!(1 * HOURS, 1 * MINUTES, "ROCOCO_EPOCH_DURATION");
49	}
50
51	// These time units are defined in number of blocks.
52	pub const MINUTES: BlockNumber = 60_000 / (MILLISECS_PER_BLOCK as BlockNumber);
53	pub const HOURS: BlockNumber = MINUTES * 60;
54	pub const DAYS: BlockNumber = HOURS * 24;
55	pub const WEEKS: BlockNumber = DAYS * 7;
56
57	// 1 in 4 blocks (on average, not counting collisions) will be primary babe blocks.
58	// The choice of is done in accordance to the slot duration and expected target
59	// block time, for safely resisting network delays of maximum two seconds.
60	// <https://research.web3.foundation/Polkadot/protocols/block-production/Babe#6-practical-results>
61	pub const PRIMARY_PROBABILITY: (u64, u64) = (1, 4);
62}
63
64/// Fee-related.
65pub mod fee {
66	use crate::weights::ExtrinsicBaseWeight;
67	use frame_support::weights::{
68		WeightToFeeCoefficient, WeightToFeeCoefficients, WeightToFeePolynomial,
69	};
70	use polkadot_primitives::Balance;
71	use smallvec::smallvec;
72	pub use sp_runtime::Perbill;
73
74	/// The block saturation level. Fees will be updates based on this value.
75	pub const TARGET_BLOCK_FULLNESS: Perbill = Perbill::from_percent(25);
76
77	/// Handles converting a weight scalar to a fee value, based on the scale and granularity of the
78	/// node's balance type.
79	///
80	/// This should typically create a mapping between the following ranges:
81	///   - [0, `frame_system::MaximumBlockWeight`]
82	///   - [Balance::min, Balance::max]
83	///
84	/// Yet, it can be used for any other sort of change to weight-fee. Some examples being:
85	///   - Setting it to `0` will essentially disable the weight fee.
86	///   - Setting it to `1` will cause the literal `#[weight = x]` values to be charged.
87	pub struct WeightToFee;
88	impl WeightToFeePolynomial for WeightToFee {
89		type Balance = Balance;
90		fn polynomial() -> WeightToFeeCoefficients<Self::Balance> {
91			// in Rococo, extrinsic base weight (smallest non-zero weight) is mapped to 1/10 CENT:
92			let p = super::currency::CENTS;
93			let q = 10 * Balance::from(ExtrinsicBaseWeight::get().ref_time());
94			smallvec![WeightToFeeCoefficient {
95				degree: 1,
96				negative: false,
97				coeff_frac: Perbill::from_rational(p % q, q),
98				coeff_integer: p / q,
99			}]
100		}
101	}
102}
103
104/// System Parachains.
105pub mod system_parachain {
106	use polkadot_primitives::Id;
107	use xcm_builder::IsChildSystemParachain;
108
109	/// Network's Asset Hub parachain ID.
110	pub const ASSET_HUB_ID: u32 = 1000;
111	/// Contracts parachain ID.
112	pub const CONTRACTS_ID: u32 = 1002;
113	/// Encointer parachain ID.
114	pub const ENCOINTER_ID: u32 = 1003;
115	/// People parachain ID.
116	pub const PEOPLE_ID: u32 = 1004;
117	/// BridgeHub parachain ID.
118	pub const BRIDGE_HUB_ID: u32 = 1013;
119	/// Brokerage parachain ID.
120	pub const BROKER_ID: u32 = 1005;
121
122	/// All system parachains of Rococo.
123	pub type SystemParachains = IsChildSystemParachain<Id>;
124
125	/// Coretime constants
126	pub mod coretime {
127		/// Coretime timeslice period in blocks
128		/// WARNING: This constant is used accross chains, so additional care should be taken
129		/// when changing it.
130		#[cfg(feature = "fast-runtime")]
131		pub const TIMESLICE_PERIOD: u32 = 20;
132		#[cfg(not(feature = "fast-runtime"))]
133		pub const TIMESLICE_PERIOD: u32 = 80;
134	}
135}
136
137/// Rococo Treasury pallet instance.
138pub const TREASURY_PALLET_ID: u8 = 18;
139
140#[cfg(test)]
141mod tests {
142	use super::{
143		currency::{CENTS, MILLICENTS},
144		fee::WeightToFee,
145	};
146	use crate::weights::ExtrinsicBaseWeight;
147	use frame_support::weights::WeightToFee as WeightToFeeT;
148	use polkadot_runtime_common::MAXIMUM_BLOCK_WEIGHT;
149
150	#[test]
151	// Test that the fee for `MAXIMUM_BLOCK_WEIGHT` of weight has sane bounds.
152	fn full_block_fee_is_correct() {
153		// A full block should cost between 1,000 and 10,000 CENTS.
154		let full_block = WeightToFee::weight_to_fee(&MAXIMUM_BLOCK_WEIGHT);
155		assert!(full_block >= 1_000 * CENTS);
156		assert!(full_block <= 10_000 * CENTS);
157	}
158
159	#[test]
160	// This function tests that the fee for `ExtrinsicBaseWeight` of weight is correct
161	fn extrinsic_base_fee_is_correct() {
162		// `ExtrinsicBaseWeight` should cost 1/10 of a CENT
163		println!("Base: {}", ExtrinsicBaseWeight::get());
164		let x = WeightToFee::weight_to_fee(&ExtrinsicBaseWeight::get());
165		let y = CENTS / 10;
166		assert!(x.max(y) - x.min(y) < MILLICENTS);
167	}
168}
rococo_runtime_constants/lib.rs

rococo_runtime_constants/
lib.rs
