Reorganising the repository - external renames and moves (#4074)

* Adding first rough ouline of the repository structure * Remove old CI stuff * add title * formatting fixes * move node-exits job's script to scripts dir * Move docs into subdir * move to bin * move maintainence scripts, configs and helpers into its own dir * add .local to ignore * move core->client * start up 'test' area * move test client * move test runtime * make test move compile * Add dependencies rule enforcement. * Fix indexing. * Update docs to reflect latest changes * Moving /srml->/paint * update docs * move client/sr-* -> primitives/ * clean old readme * remove old broken code in rhd * update lock * Step 1. * starting to untangle client * Fix after merge. * start splitting out client interfaces * move children and blockchain interfaces * Move trie and state-machine to primitives. * Fix WASM builds. * fixing broken imports * more interface moves * move backend and light to interfaces * move CallExecutor * move cli off client * moving around more interfaces * re-add consensus crates into the mix * fix subkey path * relieve client from executor * starting to pull out client from grandpa * move is_decendent_of out of client * grandpa still depends on client directly * lemme tests pass * rename srml->paint * Make it compile. * rename interfaces->client-api * Move keyring to primitives. * fixup libp2p dep * fix broken use * allow dependency enforcement to fail * move fork-tree * Moving wasm-builder * make env * move build-script-utils * fixup broken crate depdencies and names * fix imports for authority discovery * fix typo * update cargo.lock * fixing imports * Fix paths and add missing crates * re-add missing crates
2026-04-26 11:07:56 +00:00 · 2019-11-14 21:51:17 +01:00
parent becc3b0a4f
commit 60e5011c72
809 changed files with 7801 additions and 6464 deletions
@@ -0,0 +1,68 @@
+// Copyright 2019 Parity Technologies (UK) Ltd.
+// This file is part of Substrate.
+
+// Substrate 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.
+
+// Substrate 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 Substrate.  If not, see <http://www.gnu.org/licenses/>.
+
+//! A set of constant values used in substrate runtime.
+
+/// Money matters.
+pub mod currency {
+	use node_primitives::Balance;
+
+	pub const MILLICENTS: Balance = 1_000_000_000;
+	pub const CENTS: Balance = 1_000 * MILLICENTS;    // assume this is worth about a cent.
+	pub const DOLLARS: Balance = 100 * CENTS;
+}
+
+/// Time.
+pub mod time {
+	use node_primitives::{Moment, BlockNumber};
+
+	/// Since BABE is probabilistic this is the average expected block time that
+	/// we are targetting. Blocks will be produced at a minimum duration defined
+	/// by `SLOT_DURATION`, but some slots will not be allocated to any
+	/// authority and hence no block will be produced. We expect to have this
+	/// block time on average following the defined slot duration and the value
+	/// of `c` configured for BABE (where `1 - c` represents the probability of
+	/// a slot being empty).
+	/// This value is only used indirectly to define the unit constants below
+	/// that are expressed in blocks. The rest of the code should use
+	/// `SLOT_DURATION` instead (like the timestamp module for calculating the
+	/// minimum period).
+	///
+	/// If using BABE with secondary slots (default) then all of the slots will
+	/// always be assigned, in which case `MILLISECS_PER_BLOCK` and
+	/// `SLOT_DURATION` should have the same value.
+	///
+	/// <https://research.web3.foundation/en/latest/polkadot/BABE/Babe/#6-practical-results>
+	pub const MILLISECS_PER_BLOCK: Moment = 3000;
+	pub const SECS_PER_BLOCK: Moment = MILLISECS_PER_BLOCK / 1000;
+
+	pub const SLOT_DURATION: Moment = MILLISECS_PER_BLOCK;
+
+	// 1 in 4 blocks (on average, not counting collisions) will be primary BABE blocks.
+	pub const PRIMARY_PROBABILITY: (u64, u64) = (1, 4);
+
+	pub const EPOCH_DURATION_IN_BLOCKS: BlockNumber = 10 * MINUTES;
+	pub const EPOCH_DURATION_IN_SLOTS: u64 = {
+		const SLOT_FILL_RATE: f64 = MILLISECS_PER_BLOCK as f64 / SLOT_DURATION as f64;
+
+		(EPOCH_DURATION_IN_BLOCKS as f64 * SLOT_FILL_RATE) as u64
+	};
+
+	// These time units are defined in number of blocks.
+	pub const MINUTES: BlockNumber = 60 / (SECS_PER_BLOCK as BlockNumber);
+	pub const HOURS: BlockNumber = MINUTES * 60;
+	pub const DAYS: BlockNumber = HOURS * 24;
+}
@@ -0,0 +1,365 @@
+// Copyright 2019 Parity Technologies (UK) Ltd.
+// This file is part of Substrate.
+
+// Substrate 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.
+
+// Substrate 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 Substrate.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Some configurable implementations as associated type for the substrate runtime.
+
+use node_primitives::Balance;
+use sr_primitives::weights::Weight;
+use sr_primitives::traits::{Convert, Saturating};
+use sr_primitives::{Fixed64, Perbill};
+use support::traits::{OnUnbalanced, Currency, Get};
+use crate::{Balances, System, Authorship, MaximumBlockWeight, NegativeImbalance};
+
+pub struct Author;
+impl OnUnbalanced<NegativeImbalance> for Author {
+	fn on_nonzero_unbalanced(amount: NegativeImbalance) {
+		Balances::resolve_creating(&Authorship::author(), amount);
+	}
+}
+
+/// Struct that handles the conversion of Balance -> `u64`. This is used for staking's election
+/// calculation.
+pub struct CurrencyToVoteHandler;
+
+impl CurrencyToVoteHandler {
+	fn factor() -> Balance { (Balances::total_issuance() / u64::max_value() as Balance).max(1) }
+}
+
+impl Convert<Balance, u64> for CurrencyToVoteHandler {
+	fn convert(x: Balance) -> u64 { (x / Self::factor()) as u64 }
+}
+
+impl Convert<u128, Balance> for CurrencyToVoteHandler {
+	fn convert(x: u128) -> Balance { x * Self::factor() }
+}
+
+/// Convert from weight to balance via a simple coefficient multiplication
+/// The associated type C encapsulates a constant in units of balance per weight
+pub struct LinearWeightToFee<C>(rstd::marker::PhantomData<C>);
+
+impl<C: Get<Balance>> Convert<Weight, Balance> for LinearWeightToFee<C> {
+	fn convert(w: Weight) -> Balance {
+		// substrate-node a weight of 10_000 (smallest non-zero weight) to be mapped to 10^7 units of
+		// fees, hence:
+		let coefficient = C::get();
+		Balance::from(w).saturating_mul(coefficient)
+	}
+}
+
+/// Update the given multiplier based on the following formula
+///
+///   diff = (previous_block_weight - target_weight)
+///   v = 0.00004
+///   next_weight = weight * (1 + (v . diff) + (v . diff)^2 / 2)
+///
+/// Where `target_weight` must be given as the `Get` implementation of the `T` generic type.
+/// https://research.web3.foundation/en/latest/polkadot/Token%20Economics/#relay-chain-transaction-fees
+pub struct TargetedFeeAdjustment<T>(rstd::marker::PhantomData<T>);
+
+impl<T: Get<Perbill>> Convert<Fixed64, Fixed64> for TargetedFeeAdjustment<T> {
+	fn convert(multiplier: Fixed64) -> Fixed64 {
+		let block_weight = System::all_extrinsics_weight();
+		let max_weight = MaximumBlockWeight::get();
+		let target_weight = (T::get() * max_weight) as u128;
+		let block_weight = block_weight as u128;
+
+		// determines if the first_term is positive
+		let positive = block_weight >= target_weight;
+		let diff_abs = block_weight.max(target_weight) - block_weight.min(target_weight);
+		// diff is within u32, safe.
+		let diff = Fixed64::from_rational(diff_abs as i64, max_weight as u64);
+		let diff_squared = diff.saturating_mul(diff);
+
+		// 0.00004 = 4/100_000 = 40_000/10^9
+		let v = Fixed64::from_rational(4, 100_000);
+		// 0.00004^2 = 16/10^10 ~= 2/10^9. Taking the future /2 into account, then it is just 1
+		// parts from a billionth.
+		let v_squared_2 = Fixed64::from_rational(1, 1_000_000_000);
+
+		let first_term = v.saturating_mul(diff);
+		// It is very unlikely that this will exist (in our poor perbill estimate) but we are giving
+		// it a shot.
+		let second_term = v_squared_2.saturating_mul(diff_squared);
+
+		if positive {
+			// Note: this is merely bounded by how big the multiplier and the inner value can go,
+			// not by any economical reasoning.
+			let excess = first_term.saturating_add(second_term);
+			multiplier.saturating_add(excess)
+		} else {
+			// Proof: first_term > second_term. Safe subtraction.
+			let negative = first_term - second_term;
+			multiplier.saturating_sub(negative)
+				// despite the fact that apply_to saturates weight (final fee cannot go below 0)
+				// it is crucially important to stop here and don't further reduce the weight fee
+				// multiplier. While at -1, it means that the network is so un-congested that all
+				// transactions have no weight fee. We stop here and only increase if the network
+				// became more busy.
+				.max(Fixed64::from_rational(-1, 1))
+		}
+	}
+}
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+	use sr_primitives::weights::Weight;
+	use sr_primitives::assert_eq_error_rate;
+	use crate::{MaximumBlockWeight, AvailableBlockRatio, Runtime};
+	use crate::{constants::currency::*, TransactionPayment, TargetBlockFullness};
+
+	fn max() -> Weight {
+		MaximumBlockWeight::get()
+	}
+
+	fn target() -> Weight {
+		TargetBlockFullness::get() * max()
+	}
+
+	// poc reference implementation.
+	fn fee_multiplier_update(block_weight: Weight, previous: Fixed64) -> Fixed64  {
+		let block_weight = block_weight as f32;
+		let v: f32 = 0.00004;
+
+		// maximum tx weight
+		let m = max() as f32;
+		// Ideal saturation in terms of weight
+		let ss = target() as f32;
+		// Current saturation in terms of weight
+		let s = block_weight;
+
+		let fm = v * (s/m - ss/m) + v.powi(2) * (s/m - ss/m).powi(2) / 2.0;
+		let addition_fm = Fixed64::from_parts((fm * 1_000_000_000_f32).round() as i64);
+		previous.saturating_add(addition_fm)
+	}
+
+	fn feemul(parts: i64) -> Fixed64 {
+		Fixed64::from_parts(parts)
+	}
+
+	fn run_with_system_weight<F>(w: Weight, assertions: F) where F: Fn() -> () {
+		let mut t: runtime_io::TestExternalities =
+			system::GenesisConfig::default().build_storage::<Runtime>().unwrap().into();
+		t.execute_with(|| {
+			System::set_block_limits(w, 0);
+			assertions()
+		});
+	}
+
+	#[test]
+	fn fee_multiplier_update_poc_works() {
+		let fm = Fixed64::from_rational(0, 1);
+		let test_set = vec![
+			(0, fm.clone()),
+			(100, fm.clone()),
+			(target(), fm.clone()),
+			(max() / 2, fm.clone()),
+			(max(), fm.clone()),
+		];
+		test_set.into_iter().for_each(|(w, fm)| {
+			run_with_system_weight(w, || {
+				assert_eq_error_rate!(
+					fee_multiplier_update(w, fm).into_inner(),
+					TargetedFeeAdjustment::<TargetBlockFullness>::convert(fm).into_inner(),
+					5,
+				);
+			})
+		})
+	}
+
+	#[test]
+	fn empty_chain_simulation() {
+		// just a few txs per_block.
+		let block_weight = 0;
+		run_with_system_weight(block_weight, || {
+			let mut fm = Fixed64::default();
+			let mut iterations: u64 = 0;
+			loop {
+				let next = TargetedFeeAdjustment::<TargetBlockFullness>::convert(fm);
+				fm = next;
+				if fm == Fixed64::from_rational(-1, 1) { break; }
+				iterations += 1;
+			}
+			println!("iteration {}, new fm = {:?}. Weight fee is now zero", iterations, fm);
+			assert!(iterations > 50_000, "This assertion is just a warning; Don't panic. \
+				Current substrate/polkadot node are configured with a _slow adjusting fee_ \
+				mechanism. Hence, it is really unlikely that fees collapse to zero even on an \
+				empty chain in less than at least of couple of thousands of empty blocks. But this \
+				simulation indicates that fees collapsed to zero after {} almost-empty blocks. \
+				Check it",
+				iterations,
+			);
+		})
+	}
+
+	#[test]
+	#[ignore]
+	fn congested_chain_simulation() {
+		// `cargo test congested_chain_simulation -- --nocapture` to get some insight.
+
+		// almost full. The entire quota of normal transactions is taken.
+		let block_weight = AvailableBlockRatio::get() * max() - 100;
+
+		// Default substrate minimum.
+		let tx_weight = 10_000;
+
+		run_with_system_weight(block_weight, || {
+			// initial value configured on module
+			let mut fm = Fixed64::default();
+			assert_eq!(fm, TransactionPayment::next_fee_multiplier());
+
+			let mut iterations: u64 = 0;
+			loop {
+				let next = TargetedFeeAdjustment::<TargetBlockFullness>::convert(fm);
+				// if no change, panic. This should never happen in this case.
+				if fm == next { panic!("The fee should ever increase"); }
+				fm = next;
+				iterations += 1;
+				let fee = <Runtime as transaction_payment::Trait>::WeightToFee::convert(tx_weight);
+				let adjusted_fee = fm.saturated_multiply_accumulate(fee);
+				println!(
+					"iteration {}, new fm = {:?}. Fee at this point is: {} units / {} millicents, \
+					{} cents, {} dollars",
+					iterations,
+					fm,
+					adjusted_fee,
+					adjusted_fee / MILLICENTS,
+					adjusted_fee / CENTS,
+					adjusted_fee / DOLLARS,
+				);
+			}
+		});
+	}
+
+	#[test]
+	fn stateless_weight_mul() {
+		run_with_system_weight(target() / 4, || {
+			// Light block. Fee is reduced a little.
+			assert_eq!(
+				TargetedFeeAdjustment::<TargetBlockFullness>::convert(Fixed64::default()),
+				feemul(-7500),
+			);
+		});
+		run_with_system_weight(target() / 2, || {
+			// a bit more. Fee is decreased less, meaning that the fee increases as the block grows.
+			assert_eq!(
+				TargetedFeeAdjustment::<TargetBlockFullness>::convert(Fixed64::default()),
+				feemul(-5000),
+			);
+
+		});
+		run_with_system_weight(target(), || {
+			// ideal. Original fee. No changes.
+			assert_eq!(
+				TargetedFeeAdjustment::<TargetBlockFullness>::convert(Fixed64::default()),
+				feemul(0),
+			);
+		});
+		run_with_system_weight(target() * 2, || {
+			// // More than ideal. Fee is increased.
+			assert_eq!(
+				TargetedFeeAdjustment::<TargetBlockFullness>::convert(Fixed64::default()),
+				feemul(10000),
+			);
+		});
+	}
+
+	#[test]
+	fn stateful_weight_mul_grow_to_infinity() {
+		run_with_system_weight(target() * 2, || {
+			assert_eq!(
+				TargetedFeeAdjustment::<TargetBlockFullness>::convert(Fixed64::default()),
+				feemul(10000)
+			);
+			assert_eq!(
+				TargetedFeeAdjustment::<TargetBlockFullness>::convert(feemul(10000)),
+				feemul(20000)
+			);
+			assert_eq!(
+				TargetedFeeAdjustment::<TargetBlockFullness>::convert(feemul(20000)),
+				feemul(30000)
+			);
+			// ...
+			assert_eq!(
+				TargetedFeeAdjustment::<TargetBlockFullness>::convert(feemul(1_000_000_000)),
+				feemul(1_000_000_000 + 10000)
+			);
+		});
+	}
+
+	#[test]
+	fn stateful_weight_mil_collapse_to_minus_one() {
+		run_with_system_weight(0, || {
+			assert_eq!(
+				TargetedFeeAdjustment::<TargetBlockFullness>::convert(Fixed64::default()),
+				feemul(-10000)
+			);
+			assert_eq!(
+				TargetedFeeAdjustment::<TargetBlockFullness>::convert(feemul(-10000)),
+				feemul(-20000)
+			);
+			assert_eq!(
+				TargetedFeeAdjustment::<TargetBlockFullness>::convert(feemul(-20000)),
+				feemul(-30000)
+			);
+			// ...
+			assert_eq!(
+				TargetedFeeAdjustment::<TargetBlockFullness>::convert(feemul(1_000_000_000 * -1)),
+				feemul(-1_000_000_000)
+			);
+		})
+	}
+
+	#[test]
+	fn weight_to_fee_should_not_overflow_on_large_weights() {
+		let kb = 1024 as Weight;
+		let mb = kb * kb;
+		let max_fm = Fixed64::from_natural(i64::max_value());
+
+		// check that for all values it can compute, correctly.
+		vec![
+			0,
+			1,
+			10,
+			1000,
+			kb,
+			10 * kb,
+			100 * kb,
+			mb,
+			10 * mb,
+			Weight::max_value() / 2,
+			Weight::max_value()
+		].into_iter().for_each(|i| {
+			run_with_system_weight(i, || {
+				let next = TargetedFeeAdjustment::<TargetBlockFullness>::convert(Fixed64::default());
+				let truth = fee_multiplier_update(i, Fixed64::default());
+				assert_eq_error_rate!(truth.into_inner(), next.into_inner(), 5);
+			});
+		});
+
+		// Some values that are all above the target and will cause an increase.
+		let t = target();
+		vec![t + 100, t * 2, t * 4]
+			.into_iter()
+			.for_each(|i| {
+				run_with_system_weight(i, || {
+					let fm = TargetedFeeAdjustment::<TargetBlockFullness>::convert(max_fm);
+					// won't grow. The convert saturates everything.
+					assert_eq!(fm, max_fm);
+				})
+			});
+	}
+}
@@ -0,0 +1,764 @@
+// Copyright 2018-2019 Parity Technologies (UK) Ltd.
+// This file is part of Substrate.
+
+// Substrate 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.
+
+// Substrate 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 Substrate.  If not, see <http://www.gnu.org/licenses/>.
+
+//! The Substrate 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 rstd::prelude::*;
+use support::{
+	construct_runtime, parameter_types, traits::{SplitTwoWays, Currency, Randomness}
+};
+use primitives::u32_trait::{_1, _2, _3, _4};
+use node_primitives::{AccountId, AccountIndex, Balance, BlockNumber, Hash, Index, Moment, Signature};
+use sr_api::impl_runtime_apis;
+use sr_primitives::{Permill, Perbill, ApplyResult, impl_opaque_keys, generic, create_runtime_str};
+use sr_primitives::curve::PiecewiseLinear;
+use sr_primitives::transaction_validity::TransactionValidity;
+use sr_primitives::weights::Weight;
+use sr_primitives::traits::{
+	self, BlakeTwo256, Block as BlockT, NumberFor, StaticLookup, SaturatedConversion,
+	OpaqueKeys,
+};
+use version::RuntimeVersion;
+#[cfg(any(feature = "std", test))]
+use version::NativeVersion;
+use primitives::OpaqueMetadata;
+use grandpa::AuthorityList as GrandpaAuthorityList;
+use grandpa::fg_primitives;
+use im_online::sr25519::{AuthorityId as ImOnlineId};
+use authority_discovery_primitives::AuthorityId as AuthorityDiscoveryId;
+use transaction_payment_rpc_runtime_api::RuntimeDispatchInfo;
+use contracts_rpc_runtime_api::ContractExecResult;
+use system::offchain::TransactionSubmitter;
+use inherents::{InherentData, CheckInherentsResult};
+
+#[cfg(any(feature = "std", test))]
+pub use sr_primitives::BuildStorage;
+pub use timestamp::Call as TimestampCall;
+pub use balances::Call as BalancesCall;
+pub use contracts::Gas;
+pub use support::StorageValue;
+pub use staking::StakerStatus;
+
+/// Implementations of some helper traits passed into runtime modules as associated types.
+pub mod impls;
+use impls::{CurrencyToVoteHandler, Author, LinearWeightToFee, TargetedFeeAdjustment};
+
+/// Constant values used within the runtime.
+pub mod constants;
+use constants::{time::*, currency::*};
+
+// Make the WASM binary available.
+#[cfg(feature = "std")]
+include!(concat!(env!("OUT_DIR"), "/wasm_binary.rs"));
+
+/// Runtime version.
+pub const VERSION: RuntimeVersion = RuntimeVersion {
+	spec_name: create_runtime_str!("node"),
+	impl_name: create_runtime_str!("substrate-node"),
+	authoring_version: 10,
+	// Per convention: if the runtime behavior changes, increment spec_version
+	// and set impl_version to equal spec_version. If only runtime
+	// implementation changes and behavior does not, then leave spec_version as
+	// is and increment impl_version.
+	spec_version: 194,
+	impl_version: 194,
+	apis: RUNTIME_API_VERSIONS,
+};
+
+/// Native version.
+#[cfg(any(feature = "std", test))]
+pub fn native_version() -> NativeVersion {
+	NativeVersion {
+		runtime_version: VERSION,
+		can_author_with: Default::default(),
+	}
+}
+
+type NegativeImbalance = <Balances as Currency<AccountId>>::NegativeImbalance;
+
+pub type DealWithFees = SplitTwoWays<
+	Balance,
+	NegativeImbalance,
+	_4, Treasury,   // 4 parts (80%) goes to the treasury.
+	_1, Author,     // 1 part (20%) goes to the block author.
+>;
+
+parameter_types! {
+	pub const BlockHashCount: BlockNumber = 250;
+	pub const MaximumBlockWeight: Weight = 1_000_000_000;
+	pub const MaximumBlockLength: u32 = 5 * 1024 * 1024;
+	pub const Version: RuntimeVersion = VERSION;
+	pub const AvailableBlockRatio: Perbill = Perbill::from_percent(75);
+}
+
+impl system::Trait for Runtime {
+	type Origin = Origin;
+	type Call = Call;
+	type Index = Index;
+	type BlockNumber = BlockNumber;
+	type Hash = Hash;
+	type Hashing = BlakeTwo256;
+	type AccountId = AccountId;
+	type Lookup = Indices;
+	type Header = generic::Header<BlockNumber, BlakeTwo256>;
+	type Event = Event;
+	type BlockHashCount = BlockHashCount;
+	type MaximumBlockWeight = MaximumBlockWeight;
+	type MaximumBlockLength = MaximumBlockLength;
+	type AvailableBlockRatio = AvailableBlockRatio;
+	type Version = Version;
+}
+
+impl utility::Trait for Runtime {
+	type Event = Event;
+	type Call = Call;
+}
+
+parameter_types! {
+	pub const EpochDuration: u64 = EPOCH_DURATION_IN_SLOTS;
+	pub const ExpectedBlockTime: Moment = MILLISECS_PER_BLOCK;
+}
+
+impl babe::Trait for Runtime {
+	type EpochDuration = EpochDuration;
+	type ExpectedBlockTime = ExpectedBlockTime;
+	type EpochChangeTrigger = babe::ExternalTrigger;
+}
+
+impl indices::Trait for Runtime {
+	type AccountIndex = AccountIndex;
+	type IsDeadAccount = Balances;
+	type ResolveHint = indices::SimpleResolveHint<Self::AccountId, Self::AccountIndex>;
+	type Event = Event;
+}
+
+parameter_types! {
+	pub const ExistentialDeposit: Balance = 1 * DOLLARS;
+	pub const TransferFee: Balance = 1 * CENTS;
+	pub const CreationFee: Balance = 1 * CENTS;
+}
+
+impl balances::Trait for Runtime {
+	type Balance = Balance;
+	type OnFreeBalanceZero = ((Staking, Contracts), Session);
+	type OnNewAccount = Indices;
+	type Event = Event;
+	type DustRemoval = ();
+	type TransferPayment = ();
+	type ExistentialDeposit = ExistentialDeposit;
+	type TransferFee = TransferFee;
+	type CreationFee = CreationFee;
+}
+
+parameter_types! {
+	pub const TransactionBaseFee: Balance = 1 * CENTS;
+	pub const TransactionByteFee: Balance = 10 * MILLICENTS;
+	// setting this to zero will disable the weight fee.
+	pub const WeightFeeCoefficient: Balance = 1_000;
+	// for a sane configuration, this should always be less than `AvailableBlockRatio`.
+	pub const TargetBlockFullness: Perbill = Perbill::from_percent(25);
+}
+
+impl transaction_payment::Trait for Runtime {
+	type Currency = Balances;
+	type OnTransactionPayment = DealWithFees;
+	type TransactionBaseFee = TransactionBaseFee;
+	type TransactionByteFee = TransactionByteFee;
+	type WeightToFee = LinearWeightToFee<WeightFeeCoefficient>;
+	type FeeMultiplierUpdate = TargetedFeeAdjustment<TargetBlockFullness>;
+}
+
+parameter_types! {
+	pub const MinimumPeriod: Moment = SLOT_DURATION / 2;
+}
+impl timestamp::Trait for Runtime {
+	type Moment = Moment;
+	type OnTimestampSet = Babe;
+	type MinimumPeriod = MinimumPeriod;
+}
+
+parameter_types! {
+	pub const UncleGenerations: BlockNumber = 5;
+}
+
+impl authorship::Trait for Runtime {
+	type FindAuthor = session::FindAccountFromAuthorIndex<Self, Babe>;
+	type UncleGenerations = UncleGenerations;
+	type FilterUncle = ();
+	type EventHandler = (Staking, ImOnline);
+}
+
+impl_opaque_keys! {
+	pub struct SessionKeys {
+		pub grandpa: Grandpa,
+		pub babe: Babe,
+		pub im_online: ImOnline,
+		pub authority_discovery: AuthorityDiscovery,
+	}
+}
+
+parameter_types! {
+	pub const DisabledValidatorsThreshold: Perbill = Perbill::from_percent(17);
+}
+
+impl session::Trait for Runtime {
+	type OnSessionEnding = Staking;
+	type SessionHandler = <SessionKeys as OpaqueKeys>::KeyTypeIdProviders;
+	type ShouldEndSession = Babe;
+	type Event = Event;
+	type Keys = SessionKeys;
+	type ValidatorId = <Self as system::Trait>::AccountId;
+	type ValidatorIdOf = staking::StashOf<Self>;
+	type SelectInitialValidators = Staking;
+	type DisabledValidatorsThreshold = DisabledValidatorsThreshold;
+}
+
+impl session::historical::Trait for Runtime {
+	type FullIdentification = staking::Exposure<AccountId, Balance>;
+	type FullIdentificationOf = staking::ExposureOf<Runtime>;
+}
+
+paint_staking_reward_curve::build! {
+	const REWARD_CURVE: PiecewiseLinear<'static> = curve!(
+		min_inflation: 0_025_000,
+		max_inflation: 0_100_000,
+		ideal_stake: 0_500_000,
+		falloff: 0_050_000,
+		max_piece_count: 40,
+		test_precision: 0_005_000,
+	);
+}
+
+parameter_types! {
+	pub const SessionsPerEra: sr_staking_primitives::SessionIndex = 6;
+	pub const BondingDuration: staking::EraIndex = 24 * 28;
+	pub const RewardCurve: &'static PiecewiseLinear<'static> = &REWARD_CURVE;
+}
+
+impl staking::Trait for Runtime {
+	type Currency = Balances;
+	type Time = Timestamp;
+	type CurrencyToVote = CurrencyToVoteHandler;
+	type RewardRemainder = Treasury;
+	type Event = Event;
+	type Slash = Treasury; // send the slashed funds to the treasury.
+	type Reward = (); // rewards are minted from the void
+	type SessionsPerEra = SessionsPerEra;
+	type BondingDuration = BondingDuration;
+	type SessionInterface = Self;
+	type RewardCurve = RewardCurve;
+}
+
+parameter_types! {
+	pub const LaunchPeriod: BlockNumber = 28 * 24 * 60 * MINUTES;
+	pub const VotingPeriod: BlockNumber = 28 * 24 * 60 * MINUTES;
+	pub const EmergencyVotingPeriod: BlockNumber = 3 * 24 * 60 * MINUTES;
+	pub const MinimumDeposit: Balance = 100 * DOLLARS;
+	pub const EnactmentPeriod: BlockNumber = 30 * 24 * 60 * MINUTES;
+	pub const CooloffPeriod: BlockNumber = 28 * 24 * 60 * MINUTES;
+}
+
+impl democracy::Trait for Runtime {
+	type Proposal = Call;
+	type Event = Event;
+	type Currency = Balances;
+	type EnactmentPeriod = EnactmentPeriod;
+	type LaunchPeriod = LaunchPeriod;
+	type VotingPeriod = VotingPeriod;
+	type EmergencyVotingPeriod = EmergencyVotingPeriod;
+	type MinimumDeposit = MinimumDeposit;
+	/// A straight majority of the council can decide what their next motion is.
+	type ExternalOrigin = collective::EnsureProportionAtLeast<_1, _2, AccountId, CouncilCollective>;
+	/// A super-majority can have the next scheduled referendum be a straight majority-carries vote.
+	type ExternalMajorityOrigin = collective::EnsureProportionAtLeast<_3, _4, AccountId, CouncilCollective>;
+	/// A unanimous council can have the next scheduled referendum be a straight default-carries
+	/// (NTB) vote.
+	type ExternalDefaultOrigin = collective::EnsureProportionAtLeast<_1, _1, AccountId, CouncilCollective>;
+	/// Two thirds of the technical committee can have an ExternalMajority/ExternalDefault vote
+	/// be tabled immediately and with a shorter voting/enactment period.
+	type FastTrackOrigin = collective::EnsureProportionAtLeast<_2, _3, AccountId, TechnicalCollective>;
+	// To cancel a proposal which has been passed, 2/3 of the council must agree to it.
+	type CancellationOrigin = collective::EnsureProportionAtLeast<_2, _3, AccountId, CouncilCollective>;
+	// Any single technical committee member may veto a coming council proposal, however they can
+	// only do it once and it lasts only for the cooloff period.
+	type VetoOrigin = collective::EnsureMember<AccountId, TechnicalCollective>;
+	type CooloffPeriod = CooloffPeriod;
+}
+
+type CouncilCollective = collective::Instance1;
+impl collective::Trait<CouncilCollective> for Runtime {
+	type Origin = Origin;
+	type Proposal = Call;
+	type Event = Event;
+}
+
+parameter_types! {
+	pub const CandidacyBond: Balance = 10 * DOLLARS;
+	pub const VotingBond: Balance = 1 * DOLLARS;
+	pub const TermDuration: BlockNumber = 7 * DAYS;
+	pub const DesiredMembers: u32 = 13;
+	pub const DesiredRunnersUp: u32 = 7;
+}
+
+impl elections_phragmen::Trait for Runtime {
+	type Event = Event;
+	type Currency = Balances;
+	type CurrencyToVote = CurrencyToVoteHandler;
+	type CandidacyBond = CandidacyBond;
+	type VotingBond = VotingBond;
+	type TermDuration = TermDuration;
+	type DesiredMembers = DesiredMembers;
+	type DesiredRunnersUp = DesiredRunnersUp;
+	type LoserCandidate = ();
+	type BadReport = ();
+	type KickedMember = ();
+	type ChangeMembers = Council;
+}
+
+type TechnicalCollective = collective::Instance2;
+impl collective::Trait<TechnicalCollective> for Runtime {
+	type Origin = Origin;
+	type Proposal = Call;
+	type Event = Event;
+}
+
+impl membership::Trait<membership::Instance1> for Runtime {
+	type Event = Event;
+	type AddOrigin = collective::EnsureProportionMoreThan<_1, _2, AccountId, CouncilCollective>;
+	type RemoveOrigin = collective::EnsureProportionMoreThan<_1, _2, AccountId, CouncilCollective>;
+	type SwapOrigin = collective::EnsureProportionMoreThan<_1, _2, AccountId, CouncilCollective>;
+	type ResetOrigin = collective::EnsureProportionMoreThan<_1, _2, AccountId, CouncilCollective>;
+	type MembershipInitialized = TechnicalCommittee;
+	type MembershipChanged = TechnicalCommittee;
+}
+
+parameter_types! {
+	pub const ProposalBond: Permill = Permill::from_percent(5);
+	pub const ProposalBondMinimum: Balance = 1 * DOLLARS;
+	pub const SpendPeriod: BlockNumber = 1 * DAYS;
+	pub const Burn: Permill = Permill::from_percent(50);
+}
+
+impl treasury::Trait for Runtime {
+	type Currency = Balances;
+	type ApproveOrigin = collective::EnsureMembers<_4, AccountId, CouncilCollective>;
+	type RejectOrigin = collective::EnsureMembers<_2, AccountId, CouncilCollective>;
+	type Event = Event;
+	type ProposalRejection = ();
+	type ProposalBond = ProposalBond;
+	type ProposalBondMinimum = ProposalBondMinimum;
+	type SpendPeriod = SpendPeriod;
+	type Burn = Burn;
+}
+
+parameter_types! {
+	pub const ContractTransferFee: Balance = 1 * CENTS;
+	pub const ContractCreationFee: Balance = 1 * CENTS;
+	pub const ContractTransactionBaseFee: Balance = 1 * CENTS;
+	pub const ContractTransactionByteFee: Balance = 10 * MILLICENTS;
+	pub const ContractFee: Balance = 1 * CENTS;
+	pub const TombstoneDeposit: Balance = 1 * DOLLARS;
+	pub const RentByteFee: Balance = 1 * DOLLARS;
+	pub const RentDepositOffset: Balance = 1000 * DOLLARS;
+	pub const SurchargeReward: Balance = 150 * DOLLARS;
+}
+
+impl contracts::Trait for Runtime {
+	type Currency = Balances;
+	type Time = Timestamp;
+	type Randomness = RandomnessCollectiveFlip;
+	type Call = Call;
+	type Event = Event;
+	type DetermineContractAddress = contracts::SimpleAddressDeterminator<Runtime>;
+	type ComputeDispatchFee = contracts::DefaultDispatchFeeComputor<Runtime>;
+	type TrieIdGenerator = contracts::TrieIdFromParentCounter<Runtime>;
+	type GasPayment = ();
+	type RentPayment = ();
+	type SignedClaimHandicap = contracts::DefaultSignedClaimHandicap;
+	type TombstoneDeposit = TombstoneDeposit;
+	type StorageSizeOffset = contracts::DefaultStorageSizeOffset;
+	type RentByteFee = RentByteFee;
+	type RentDepositOffset = RentDepositOffset;
+	type SurchargeReward = SurchargeReward;
+	type TransferFee = ContractTransferFee;
+	type CreationFee = ContractCreationFee;
+	type TransactionBaseFee = ContractTransactionBaseFee;
+	type TransactionByteFee = ContractTransactionByteFee;
+	type ContractFee = ContractFee;
+	type CallBaseFee = contracts::DefaultCallBaseFee;
+	type InstantiateBaseFee = contracts::DefaultInstantiateBaseFee;
+	type MaxDepth = contracts::DefaultMaxDepth;
+	type MaxValueSize = contracts::DefaultMaxValueSize;
+	type BlockGasLimit = contracts::DefaultBlockGasLimit;
+}
+
+impl sudo::Trait for Runtime {
+	type Event = Event;
+	type Proposal = Call;
+}
+
+type SubmitTransaction = TransactionSubmitter<ImOnlineId, Runtime, UncheckedExtrinsic>;
+
+parameter_types! {
+	pub const SessionDuration: BlockNumber = EPOCH_DURATION_IN_SLOTS as _;
+}
+
+impl im_online::Trait for Runtime {
+	type AuthorityId = ImOnlineId;
+	type Call = Call;
+	type Event = Event;
+	type SubmitTransaction = SubmitTransaction;
+	type ReportUnresponsiveness = Offences;
+	type SessionDuration = SessionDuration;
+}
+
+impl offences::Trait for Runtime {
+	type Event = Event;
+	type IdentificationTuple = session::historical::IdentificationTuple<Self>;
+	type OnOffenceHandler = Staking;
+}
+
+impl authority_discovery::Trait for Runtime {}
+
+impl grandpa::Trait for Runtime {
+	type Event = Event;
+}
+
+parameter_types! {
+	pub const WindowSize: BlockNumber = 101;
+	pub const ReportLatency: BlockNumber = 1000;
+}
+
+impl finality_tracker::Trait for Runtime {
+	type OnFinalizationStalled = Grandpa;
+	type WindowSize = WindowSize;
+	type ReportLatency = ReportLatency;
+}
+
+parameter_types! {
+	pub const ReservationFee: Balance = 1 * DOLLARS;
+	pub const MinLength: usize = 3;
+	pub const MaxLength: usize = 16;
+}
+
+impl nicks::Trait for Runtime {
+	type Event = Event;
+	type Currency = Balances;
+	type ReservationFee = ReservationFee;
+	type Slashed = Treasury;
+	type ForceOrigin = collective::EnsureMember<AccountId, CouncilCollective>;
+	type MinLength = MinLength;
+	type MaxLength = MaxLength;
+}
+
+impl system::offchain::CreateTransaction<Runtime, UncheckedExtrinsic> for Runtime {
+	type Public = <Signature as traits::Verify>::Signer;
+	type Signature = Signature;
+
+	fn create_transaction<F: system::offchain::Signer<Self::Public, Self::Signature>>(
+		call: Call,
+		public: Self::Public,
+		account: AccountId,
+		index: Index,
+	) -> Option<(Call, <UncheckedExtrinsic as traits::Extrinsic>::SignaturePayload)> {
+		let period = 1 << 8;
+		let current_block = System::block_number().saturated_into::<u64>();
+		let tip = 0;
+		let extra: SignedExtra = (
+			system::CheckVersion::<Runtime>::new(),
+			system::CheckGenesis::<Runtime>::new(),
+			system::CheckEra::<Runtime>::from(generic::Era::mortal(period, current_block)),
+			system::CheckNonce::<Runtime>::from(index),
+			system::CheckWeight::<Runtime>::new(),
+			transaction_payment::ChargeTransactionPayment::<Runtime>::from(tip),
+			Default::default(),
+		);
+		let raw_payload = SignedPayload::new(call, extra).ok()?;
+		let signature = F::sign(public, &raw_payload)?;
+		let address = Indices::unlookup(account);
+		let (call, extra, _) = raw_payload.deconstruct();
+		Some((call, (address, signature, extra)))
+	}
+}
+
+construct_runtime!(
+	pub enum Runtime where
+		Block = Block,
+		NodeBlock = node_primitives::Block,
+		UncheckedExtrinsic = UncheckedExtrinsic
+	{
+		System: system::{Module, Call, Storage, Config, Event},
+		Utility: utility::{Module, Call, Event},
+		Babe: babe::{Module, Call, Storage, Config, Inherent(Timestamp)},
+		Timestamp: timestamp::{Module, Call, Storage, Inherent},
+		Authorship: authorship::{Module, Call, Storage, Inherent},
+		Indices: indices,
+		Balances: balances::{default, Error},
+		TransactionPayment: transaction_payment::{Module, Storage},
+		Staking: staking::{default, OfflineWorker},
+		Session: session::{Module, Call, Storage, Event, Config<T>},
+		Democracy: democracy::{Module, Call, Storage, Config, Event<T>},
+		Council: collective::<Instance1>::{Module, Call, Storage, Origin<T>, Event<T>, Config<T>},
+		TechnicalCommittee: collective::<Instance2>::{Module, Call, Storage, Origin<T>, Event<T>, Config<T>},
+		Elections: elections_phragmen::{Module, Call, Storage, Event<T>},
+		TechnicalMembership: membership::<Instance1>::{Module, Call, Storage, Event<T>, Config<T>},
+		FinalityTracker: finality_tracker::{Module, Call, Inherent},
+		Grandpa: grandpa::{Module, Call, Storage, Config, Event},
+		Treasury: treasury::{Module, Call, Storage, Config, Event<T>},
+		Contracts: contracts,
+		Sudo: sudo,
+		ImOnline: im_online::{Module, Call, Storage, Event<T>, ValidateUnsigned, Config<T>},
+		AuthorityDiscovery: authority_discovery::{Module, Call, Config},
+		Offences: offences::{Module, Call, Storage, Event},
+		RandomnessCollectiveFlip: randomness_collective_flip::{Module, Call, Storage},
+		Nicks: nicks::{Module, Call, Storage, Event<T>},
+	}
+);
+
+/// The address format for describing accounts.
+pub type Address = <Indices as StaticLookup>::Source;
+/// Block header type as expected by this runtime.
+pub type Header = generic::Header<BlockNumber, BlakeTwo256>;
+/// Block type as expected by this runtime.
+pub type Block = generic::Block<Header, UncheckedExtrinsic>;
+/// A Block signed with a Justification
+pub type SignedBlock = generic::SignedBlock<Block>;
+/// BlockId type as expected by this runtime.
+pub type BlockId = generic::BlockId<Block>;
+/// The SignedExtension to the basic transaction logic.
+pub type SignedExtra = (
+	system::CheckVersion<Runtime>,
+	system::CheckGenesis<Runtime>,
+	system::CheckEra<Runtime>,
+	system::CheckNonce<Runtime>,
+	system::CheckWeight<Runtime>,
+	transaction_payment::ChargeTransactionPayment<Runtime>,
+	contracts::CheckBlockGasLimit<Runtime>,
+);
+/// Unchecked extrinsic type as expected by this runtime.
+pub type UncheckedExtrinsic = generic::UncheckedExtrinsic<Address, Call, Signature, SignedExtra>;
+/// The payload being signed in transactions.
+pub type SignedPayload = generic::SignedPayload<Call, SignedExtra>;
+/// Extrinsic type that has already been checked.
+pub type CheckedExtrinsic = generic::CheckedExtrinsic<AccountId, Call, SignedExtra>;
+/// Executive: handles dispatch to the various modules.
+pub type Executive = executive::Executive<Runtime, Block, system::ChainContext<Runtime>, Runtime, AllModules>;
+
+impl_runtime_apis! {
+	impl sr_api::Core<Block> for Runtime {
+		fn version() -> RuntimeVersion {
+			VERSION
+		}
+
+		fn execute_block(block: Block) {
+			Executive::execute_block(block)
+		}
+
+		fn initialize_block(header: &<Block as BlockT>::Header) {
+			Executive::initialize_block(header)
+		}
+	}
+
+	impl sr_api::Metadata<Block> for Runtime {
+		fn metadata() -> OpaqueMetadata {
+			Runtime::metadata().into()
+		}
+	}
+
+	impl block_builder_api::BlockBuilder<Block> for Runtime {
+		fn apply_extrinsic(extrinsic: <Block as BlockT>::Extrinsic) -> ApplyResult {
+			Executive::apply_extrinsic(extrinsic)
+		}
+
+		fn finalize_block() -> <Block as BlockT>::Header {
+			Executive::finalize_block()
+		}
+
+		fn inherent_extrinsics(data: InherentData) -> Vec<<Block as BlockT>::Extrinsic> {
+			data.create_extrinsics()
+		}
+
+		fn check_inherents(block: Block, data: InherentData) -> CheckInherentsResult {
+			data.check_extrinsics(&block)
+		}
+
+		fn random_seed() -> <Block as BlockT>::Hash {
+			RandomnessCollectiveFlip::random_seed()
+		}
+	}
+
+	impl tx_pool_api::TaggedTransactionQueue<Block> for Runtime {
+		fn validate_transaction(tx: <Block as BlockT>::Extrinsic) -> TransactionValidity {
+			Executive::validate_transaction(tx)
+		}
+	}
+
+	impl offchain_primitives::OffchainWorkerApi<Block> for Runtime {
+		fn offchain_worker(number: NumberFor<Block>) {
+			Executive::offchain_worker(number)
+		}
+	}
+
+	impl fg_primitives::GrandpaApi<Block> for Runtime {
+		fn grandpa_authorities() -> GrandpaAuthorityList {
+			Grandpa::grandpa_authorities()
+		}
+	}
+
+	impl babe_primitives::BabeApi<Block> for Runtime {
+		fn configuration() -> babe_primitives::BabeConfiguration {
+			// The choice of `c` parameter (where `1 - c` represents the
+			// probability of a slot being empty), is done in accordance to the
+			// slot duration and expected target block time, for safely
+			// resisting network delays of maximum two seconds.
+			// <https://research.web3.foundation/en/latest/polkadot/BABE/Babe/#6-practical-results>
+			babe_primitives::BabeConfiguration {
+				slot_duration: Babe::slot_duration(),
+				epoch_length: EpochDuration::get(),
+				c: PRIMARY_PROBABILITY,
+				genesis_authorities: Babe::authorities(),
+				randomness: Babe::randomness(),
+				secondary_slots: true,
+			}
+		}
+	}
+
+	impl authority_discovery_primitives::AuthorityDiscoveryApi<Block> for Runtime {
+		fn authorities() -> Vec<AuthorityDiscoveryId> {
+			AuthorityDiscovery::authorities()
+		}
+	}
+
+	impl system_rpc_runtime_api::AccountNonceApi<Block, AccountId, Index> for Runtime {
+		fn account_nonce(account: AccountId) -> Index {
+			System::account_nonce(account)
+		}
+	}
+
+	impl contracts_rpc_runtime_api::ContractsApi<Block, AccountId, Balance> for Runtime {
+		fn call(
+			origin: AccountId,
+			dest: AccountId,
+			value: Balance,
+			gas_limit: u64,
+			input_data: Vec<u8>,
+		) -> ContractExecResult {
+			let exec_result = Contracts::bare_call(
+				origin,
+				dest.into(),
+				value,
+				gas_limit,
+				input_data,
+			);
+			match exec_result {
+				Ok(v) => ContractExecResult::Success {
+					status: v.status,
+					data: v.data,
+				},
+				Err(_) => ContractExecResult::Error,
+			}
+		}
+
+		fn get_storage(
+			address: AccountId,
+			key: [u8; 32],
+		) -> contracts_rpc_runtime_api::GetStorageResult {
+			Contracts::get_storage(address, key).map_err(|rpc_err| {
+				use contracts::GetStorageError;
+				use contracts_rpc_runtime_api::{GetStorageError as RpcGetStorageError};
+				/// Map the contract error into the RPC layer error.
+				match rpc_err {
+					GetStorageError::ContractDoesntExist => RpcGetStorageError::ContractDoesntExist,
+					GetStorageError::IsTombstone => RpcGetStorageError::IsTombstone,
+				}
+			})
+		}
+	}
+
+	impl transaction_payment_rpc_runtime_api::TransactionPaymentApi<
+		Block,
+		Balance,
+		UncheckedExtrinsic,
+	> for Runtime {
+		fn query_info(uxt: UncheckedExtrinsic, len: u32) -> RuntimeDispatchInfo<Balance> {
+			TransactionPayment::query_info(uxt, len)
+		}
+	}
+
+	impl substrate_session::SessionKeys<Block> for Runtime {
+		fn generate_session_keys(seed: Option<Vec<u8>>) -> Vec<u8> {
+			SessionKeys::generate(seed)
+		}
+	}
+}
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+	use system::offchain::SubmitSignedTransaction;
+
+	fn is_submit_signed_transaction<T>(_arg: T) where
+		T: SubmitSignedTransaction<
+			Runtime,
+			Call,
+			Extrinsic=UncheckedExtrinsic,
+			CreateTransaction=Runtime,
+			Signer=ImOnlineId,
+		>,
+	{}
+
+	#[test]
+	fn validate_bounds() {
+		let x = SubmitTransaction::default();
+		is_submit_signed_transaction(x);
+	}
+
+	#[test]
+	fn block_hooks_weight_should_not_exceed_limits() {
+		use sr_primitives::weights::WeighBlock;
+		let check_for_block = |b| {
+			let block_hooks_weight =
+				<AllModules as WeighBlock<BlockNumber>>::on_initialize(b) +
+				<AllModules as WeighBlock<BlockNumber>>::on_finalize(b);
+
+			assert_eq!(
+				block_hooks_weight,
+				0,
+				"This test might fail simply because the value being compared to has increased to a \
+				module declaring a new weight for a hook or call. In this case update the test and \
+				happily move on.",
+			);
+
+			// Invariant. Always must be like this to have a sane chain.
+			assert!(block_hooks_weight < MaximumBlockWeight::get());
+
+			// Warning.
+			if block_hooks_weight > MaximumBlockWeight::get() / 2 {
+				println!(
+					"block hooks weight is consuming more than a block's capacity. You probably want \
+					to re-think this. This test will fail now."
+				);
+				assert!(false);
+			}
+		};
+
+		let _ = (0..100_000).for_each(check_for_block);
+	}
+}