parachains-common 30.0.0

Logic which is common to all parachain runtimes
Documentation 
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// Copyright (C) Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// 	http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#![cfg_attr(not(feature = "std"), no_std)]

extern crate alloc;

pub mod impls;
pub mod message_queue;
pub mod pay;
pub mod xcm_config;
pub use constants::*;
pub use parachains_common_types::{opaque::*, *};

/// Common constants of parachains.
mod constants {
	use frame_support::{
		weights::{constants::WEIGHT_REF_TIME_PER_SECOND, Weight},
		PalletId,
	};
	use parachains_common_types::BlockNumber;
	use sp_runtime::Perbill;

	/// This determines the average expected block time that we are targeting. Blocks will be
	/// produced at a minimum duration defined by `SLOT_DURATION`. `SLOT_DURATION` is picked up by
	/// `pallet_timestamp` which is in turn picked up by `pallet_aura` to implement `fn
	/// slot_duration()`.
	///
	/// Change this to adjust the block time.
	pub const MILLISECS_PER_BLOCK: u64 = 12000;
	pub const SLOT_DURATION: u64 = MILLISECS_PER_BLOCK;

	// Time is measured by 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;

	/// We assume that ~5% of the block weight is consumed by `on_initialize` handlers. This is
	/// used to limit the maximal weight of a single extrinsic.
	pub const AVERAGE_ON_INITIALIZE_RATIO: Perbill = Perbill::from_percent(5);
	/// We allow `Normal` extrinsics to fill up the block up to 75%, the rest can be used by
	/// Operational  extrinsics.
	pub const NORMAL_DISPATCH_RATIO: Perbill = Perbill::from_percent(75);

	/// We allow for 0.5 seconds of compute with a 6 second average block time.
	pub const MAXIMUM_BLOCK_WEIGHT: Weight = Weight::from_parts(
		WEIGHT_REF_TIME_PER_SECOND.saturating_div(2),
		polkadot_primitives::MAX_POV_SIZE as u64,
	);

	/// We allow for 2 seconds of compute with a 6 second average block.
	pub const MAXIMUM_BLOCK_WEIGHT_FOR_ASYNC_BACKING: Weight = Weight::from_parts(
		WEIGHT_REF_TIME_PER_SECOND.saturating_mul(2),
		polkadot_primitives::MAX_POV_SIZE as u64,
	);

	/// Treasury pallet id of the local chain, used to convert into AccountId
	pub const TREASURY_PALLET_ID: PalletId = PalletId(*b"py/trsry");
}