From f8bf9cb82757cd094c52a86b3df0bc9d46904f5e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?D=C3=B3nal=20Murray?= <donal.murray@parity.io>
Date: Fri, 8 Dec 2023 17:50:44 +0000
Subject: [PATCH 01/12] Add kusama and polkadot SP constants

---
 Cargo.lock                             |  12 +++
 Cargo.toml                             |   1 +
 system-parachains/common/Cargo.toml    |  31 +++++++
 system-parachains/common/src/kusama.rs | 122 +++++++++++++++++++++++++
 system-parachains/common/src/lib.rs    |  64 +++++++++++++
 5 files changed, 230 insertions(+)
 create mode 100644 system-parachains/common/Cargo.toml
 create mode 100644 system-parachains/common/src/kusama.rs
 create mode 100644 system-parachains/common/src/lib.rs

diff --git a/Cargo.lock b/Cargo.lock
index b007446808..3ffaa12c78 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -11828,6 +11828,18 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "system-parachains-common"
+version = "1.0.0"
+dependencies = [
+ "frame-support",
+ "parachains-common",
+ "polkadot-core-primitives",
+ "polkadot-primitives",
+ "smallvec",
+ "sp-runtime",
+]
+
 [[package]]
 name = "tap"
 version = "1.0.1"
diff --git a/Cargo.toml b/Cargo.toml
index ae60da4073..994a3df509 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,6 +18,7 @@ members = [
 	"system-parachains/bridge-hubs/bridge-hub-kusama",
 	"system-parachains/bridge-hubs/bridge-hub-polkadot",
 	"system-parachains/collectives/collectives-polkadot",
+	"system-parachains/common",
 	"system-parachains/gluttons/glutton-kusama",
 ]
 
diff --git a/system-parachains/common/Cargo.toml b/system-parachains/common/Cargo.toml
new file mode 100644
index 0000000000..54d7463015
--- /dev/null
+++ b/system-parachains/common/Cargo.toml
@@ -0,0 +1,31 @@
+[package]
+name = "system-parachains-common"
+repository.workspace = true
+version.workspace = true
+authors.workspace = true
+edition.workspace = true
+license.workspace = true
+
+[dependencies]
+smallvec = "1.8.0"
+
+# Substrate
+frame-support = { default-features = false , version = "25.0.0" }
+sp-runtime = { default-features = false , version = "28.0.0" }
+
+# Polkadot
+polkadot-core-primitives = { default-features = false, version = "4.0.0"}
+polkadot-primitives = { default-features = false , version = "4.0.0" }
+
+# Cumulus
+parachains-common = { default-features = false , version = "4.0.0" }
+
+[features]
+default = [ "std" ]
+std = [
+	"frame-support/std",
+	"parachains-common/std",
+	"polkadot-core-primitives/std",
+	"polkadot-primitives/std",
+	"sp-runtime/std",
+]
diff --git a/system-parachains/common/src/kusama.rs b/system-parachains/common/src/kusama.rs
new file mode 100644
index 0000000000..073971a707
--- /dev/null
+++ b/system-parachains/common/src/kusama.rs
@@ -0,0 +1,122 @@
+// 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.
+
+/// Consensus-related.
+pub mod consensus {
+	/// Maximum number of blocks simultaneously accepted by the Runtime, not yet included
+	/// into the relay chain.
+	pub const UNINCLUDED_SEGMENT_CAPACITY: u32 = 1;
+	/// How many parachain blocks are processed by the relay chain per parent. Limits the
+	/// number of blocks authored per slot.
+	pub const BLOCK_PROCESSING_VELOCITY: u32 = 1;
+	/// Relay chain slot duration, in milliseconds.
+	pub const RELAY_CHAIN_SLOT_DURATION_MILLIS: u32 = 6000;
+}
+
+/// Constants relating to KSM.
+pub mod currency {
+	use polkadot_core_primitives::Balance;
+
+	/// The existential deposit. Set to 1/10 of its parent Relay Chain.
+	pub const EXISTENTIAL_DEPOSIT: Balance = 1 * CENTS / 10;
+
+	pub const UNITS: Balance = 1_000_000_000_000;
+	pub const QUID: Balance = UNITS / 30;
+	pub const CENTS: Balance = QUID / 100;
+	pub const GRAND: Balance = QUID * 1_000;
+	pub const MILLICENTS: Balance = CENTS / 1_000;
+
+	pub const fn deposit(items: u32, bytes: u32) -> Balance {
+		// map to 1/100 of what the kusama relay chain charges (v9020)
+		(items as Balance * 2_000 * CENTS + (bytes as Balance) * 100 * MILLICENTS) / 100
+	}
+}
+
+/// Constants related to Kusama fee payment.
+pub mod fee {
+	use frame_support::{
+		pallet_prelude::Weight,
+		weights::{
+			constants::ExtrinsicBaseWeight, FeePolynomial, WeightToFeeCoefficient,
+			WeightToFeeCoefficients, WeightToFeePolynomial,
+		},
+	};
+	use polkadot_core_primitives::Balance;
+	use smallvec::smallvec;
+	pub use sp_runtime::Perbill;
+
+	/// 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, MAXIMUM_BLOCK_WEIGHT]
+	///   - [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 frame_support::weights::WeightToFee for WeightToFee {
+		type Balance = Balance;
+
+		fn weight_to_fee(weight: &Weight) -> Self::Balance {
+			let time_poly: FeePolynomial<Balance> = RefTimeToFee::polynomial().into();
+			let proof_poly: FeePolynomial<Balance> = ProofSizeToFee::polynomial().into();
+
+			// Take the maximum instead of the sum to charge by the more scarce resource.
+			time_poly.eval(weight.ref_time()).max(proof_poly.eval(weight.proof_size()))
+		}
+	}
+
+	/// Maps the reference time component of `Weight` to a fee.
+	pub struct RefTimeToFee;
+	impl WeightToFeePolynomial for RefTimeToFee {
+		type Balance = Balance;
+		fn polynomial() -> WeightToFeeCoefficients<Self::Balance> {
+			// In Kusama, extrinsic base weight (smallest non-zero weight) is mapped to 1/10 CENT:
+			// The standard system parachain configuration is 1/10 of that, as in 1/100 CENT.
+			let p = super::currency::CENTS;
+			let q = 100 * Balance::from(ExtrinsicBaseWeight::get().ref_time());
+
+			smallvec![WeightToFeeCoefficient {
+				degree: 1,
+				negative: false,
+				coeff_frac: Perbill::from_rational(p % q, q),
+				coeff_integer: p / q,
+			}]
+		}
+	}
+
+	/// Maps the proof size component of `Weight` to a fee.
+	pub struct ProofSizeToFee;
+	impl WeightToFeePolynomial for ProofSizeToFee {
+		type Balance = Balance;
+		fn polynomial() -> WeightToFeeCoefficients<Self::Balance> {
+			// Map 10kb proof to 1 CENT.
+			let p = super::currency::CENTS;
+			let q = 10_000;
+
+			smallvec![WeightToFeeCoefficient {
+				degree: 1,
+				negative: false,
+				coeff_frac: Perbill::from_rational(p % q, q),
+				coeff_integer: p / q,
+			}]
+		}
+	}
+}
diff --git a/system-parachains/common/src/lib.rs b/system-parachains/common/src/lib.rs
new file mode 100644
index 0000000000..17f3c339bc
--- /dev/null
+++ b/system-parachains/common/src/lib.rs
@@ -0,0 +1,64 @@
+// Copyright (C) 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/>.
+
+#![cfg_attr(not(feature = "std"), no_std)]
+
+pub mod kusama;
+pub mod polkadot;
+
+pub use constants::*;
+
+/// re-export types from upstream
+pub use parachains_common::BlockNumber;
+
+/// Common constants of parachains.
+mod constants {
+	use super::BlockNumber;
+	use frame_support::{
+		weights::{constants::WEIGHT_REF_TIME_PER_SECOND, Weight},
+		PalletId,
+	};
+	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,
+	);
+
+	/// Treasury pallet id of the local chain, used to convert into AccountId
+	pub const TREASURY_PALLET_ID: PalletId = PalletId(*b"py/trsry");
+}

From f05c9500f85ef890f5b796ff3112a5a8ebda7938 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?D=C3=B3nal=20Murray?= <donal.murray@parity.io>
Date: Fri, 8 Dec 2023 18:10:55 +0000
Subject: [PATCH 02/12] Rename to constants

---
 Cargo.lock                                                  | 6 ++++++
 system-parachains/asset-hubs/asset-hub-kusama/Cargo.toml    | 2 ++
 system-parachains/asset-hubs/asset-hub-polkadot/Cargo.toml  | 2 ++
 system-parachains/bridge-hubs/bridge-hub-kusama/Cargo.toml  | 2 ++
 .../bridge-hubs/bridge-hub-polkadot/Cargo.toml              | 2 ++
 .../collectives/collectives-polkadot/Cargo.toml             | 2 ++
 system-parachains/{common => constants}/Cargo.toml          | 2 +-
 system-parachains/{common => constants}/src/kusama.rs       | 0
 system-parachains/{common => constants}/src/lib.rs          | 0
 system-parachains/gluttons/glutton-kusama/Cargo.toml        | 2 ++
 10 files changed, 19 insertions(+), 1 deletion(-)
 rename system-parachains/{common => constants}/Cargo.toml (95%)
 rename system-parachains/{common => constants}/src/kusama.rs (100%)
 rename system-parachains/{common => constants}/src/lib.rs (100%)

diff --git a/Cargo.lock b/Cargo.lock
index 3ffaa12c78..dace4df8bf 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -596,6 +596,7 @@ dependencies = [
  "staging-xcm-builder",
  "staging-xcm-executor",
  "substrate-wasm-builder",
+ "system-parachains-common",
 ]
 
 [[package]]
@@ -666,6 +667,7 @@ dependencies = [
  "staging-xcm-builder",
  "staging-xcm-executor",
  "substrate-wasm-builder",
+ "system-parachains-common",
 ]
 
 [[package]]
@@ -1325,6 +1327,7 @@ dependencies = [
  "staging-xcm-builder",
  "staging-xcm-executor",
  "substrate-wasm-builder",
+ "system-parachains-common",
 ]
 
 [[package]]
@@ -1389,6 +1392,7 @@ dependencies = [
  "staging-xcm-builder",
  "staging-xcm-executor",
  "substrate-wasm-builder",
+ "system-parachains-common",
 ]
 
 [[package]]
@@ -1890,6 +1894,7 @@ dependencies = [
  "staging-xcm-builder",
  "staging-xcm-executor",
  "substrate-wasm-builder",
+ "system-parachains-common",
 ]
 
 [[package]]
@@ -3961,6 +3966,7 @@ dependencies = [
  "staging-xcm-builder",
  "staging-xcm-executor",
  "substrate-wasm-builder",
+ "system-parachains-common",
 ]
 
 [[package]]
diff --git a/system-parachains/asset-hubs/asset-hub-kusama/Cargo.toml b/system-parachains/asset-hubs/asset-hub-kusama/Cargo.toml
index c7abca8d60..b5e514e71f 100644
--- a/system-parachains/asset-hubs/asset-hub-kusama/Cargo.toml
+++ b/system-parachains/asset-hubs/asset-hub-kusama/Cargo.toml
@@ -81,6 +81,7 @@ cumulus-primitives-utility = { default-features = false , version = "0.4.0" }
 pallet-collator-selection = { default-features = false , version = "6.0.0" }
 parachain-info = { package = "staging-parachain-info", default-features = false , version = "0.4.0" }
 parachains-common = { default-features = false , version = "4.0.0" }
+system-parachains-constants = { path = "../../constants", default-features = false }
 assets-common = { default-features = false , version = "0.4.0" }
 
 [dev-dependencies]
@@ -223,6 +224,7 @@ std = [
 	"sp-version/std",
 	"sp-weights/std",
 	"substrate-wasm-builder",
+	"system-parachains-constants/std",
 	"xcm-builder/std",
 	"xcm-executor/std",
 	"xcm/std",
diff --git a/system-parachains/asset-hubs/asset-hub-polkadot/Cargo.toml b/system-parachains/asset-hubs/asset-hub-polkadot/Cargo.toml
index a3125308b7..0b626126ed 100644
--- a/system-parachains/asset-hubs/asset-hub-polkadot/Cargo.toml
+++ b/system-parachains/asset-hubs/asset-hub-polkadot/Cargo.toml
@@ -76,6 +76,7 @@ cumulus-primitives-utility = { default-features = false , version = "0.4.0" }
 pallet-collator-selection = { default-features = false , version = "6.0.0" }
 parachain-info = { package = "staging-parachain-info", default-features = false , version = "0.4.0" }
 parachains-common = { default-features = false , version = "4.0.0" }
+system-parachains-constants = { path = "../../constants", default-features = false }
 assets-common = { default-features = false , version = "0.4.0" }
 
 [dev-dependencies]
@@ -204,6 +205,7 @@ std = [
 	"sp-version/std",
 	"sp-weights/std",
 	"substrate-wasm-builder",
+	"system-parachains-constants/std",
 	"xcm-builder/std",
 	"xcm-executor/std",
 	"xcm/std",
diff --git a/system-parachains/bridge-hubs/bridge-hub-kusama/Cargo.toml b/system-parachains/bridge-hubs/bridge-hub-kusama/Cargo.toml
index ed7d2bf1f1..cecd47bb88 100644
--- a/system-parachains/bridge-hubs/bridge-hub-kusama/Cargo.toml
+++ b/system-parachains/bridge-hubs/bridge-hub-kusama/Cargo.toml
@@ -74,6 +74,7 @@ cumulus-primitives-utility = { default-features = false , version = "0.4.0" }
 pallet-collator-selection = { default-features = false , version = "6.0.0" }
 parachain-info = { package = "staging-parachain-info", default-features = false , version = "0.4.0" }
 parachains-common = { default-features = false , version = "4.0.0" }
+system-parachains-constants = { path = "../../constants", default-features = false }
 
 [dev-dependencies]
 bridge-hub-test-utils = { version = "0.4.0" }
@@ -133,6 +134,7 @@ std = [
 	"sp-transaction-pool/std",
 	"sp-version/std",
 	"substrate-wasm-builder",
+	"system-parachains-constants/std",
 	"xcm-builder/std",
 	"xcm-executor/std",
 	"xcm/std",
diff --git a/system-parachains/bridge-hubs/bridge-hub-polkadot/Cargo.toml b/system-parachains/bridge-hubs/bridge-hub-polkadot/Cargo.toml
index 2e74c27c78..46aef5b926 100644
--- a/system-parachains/bridge-hubs/bridge-hub-polkadot/Cargo.toml
+++ b/system-parachains/bridge-hubs/bridge-hub-polkadot/Cargo.toml
@@ -74,6 +74,7 @@ cumulus-primitives-utility = { default-features = false , version = "0.4.0" }
 pallet-collator-selection = { default-features = false , version = "6.0.0" }
 parachain-info = { package = "staging-parachain-info", default-features = false , version = "0.4.0" }
 parachains-common = { default-features = false , version = "4.0.0" }
+system-parachains-constants = { path = "../../constants", default-features = false }
 
 [dev-dependencies]
 bridge-hub-test-utils = { version = "0.4.0" }
@@ -133,6 +134,7 @@ std = [
 	"sp-transaction-pool/std",
 	"sp-version/std",
 	"substrate-wasm-builder",
+	"system-parachains-constants/std",
 	"xcm-builder/std",
 	"xcm-executor/std",
 	"xcm/std",
diff --git a/system-parachains/collectives/collectives-polkadot/Cargo.toml b/system-parachains/collectives/collectives-polkadot/Cargo.toml
index dd0182ac0c..0bbf5bf237 100644
--- a/system-parachains/collectives/collectives-polkadot/Cargo.toml
+++ b/system-parachains/collectives/collectives-polkadot/Cargo.toml
@@ -78,6 +78,7 @@ cumulus-primitives-utility = { default-features = false , version = "0.4.0" }
 pallet-collator-selection = { default-features = false , version = "6.0.0" }
 parachain-info = { package = "staging-parachain-info", default-features = false , version = "0.4.0" }
 parachains-common = { default-features = false , version = "4.0.0" }
+system-parachains-constants = { path = "../../constants", default-features = false }
 
 [build-dependencies]
 substrate-wasm-builder = { optional = true , version = "14.0.0" }
@@ -206,6 +207,7 @@ std = [
 	"sp-transaction-pool/std",
 	"sp-version/std",
 	"substrate-wasm-builder",
+	"system-parachains-constants/std",
 	"xcm-builder/std",
 	"xcm-executor/std",
 	"xcm/std",
diff --git a/system-parachains/common/Cargo.toml b/system-parachains/constants/Cargo.toml
similarity index 95%
rename from system-parachains/common/Cargo.toml
rename to system-parachains/constants/Cargo.toml
index 54d7463015..2721f0a19c 100644
--- a/system-parachains/common/Cargo.toml
+++ b/system-parachains/constants/Cargo.toml
@@ -1,5 +1,5 @@
 [package]
-name = "system-parachains-common"
+name = "system-parachains-constants"
 repository.workspace = true
 version.workspace = true
 authors.workspace = true
diff --git a/system-parachains/common/src/kusama.rs b/system-parachains/constants/src/kusama.rs
similarity index 100%
rename from system-parachains/common/src/kusama.rs
rename to system-parachains/constants/src/kusama.rs
diff --git a/system-parachains/common/src/lib.rs b/system-parachains/constants/src/lib.rs
similarity index 100%
rename from system-parachains/common/src/lib.rs
rename to system-parachains/constants/src/lib.rs
diff --git a/system-parachains/gluttons/glutton-kusama/Cargo.toml b/system-parachains/gluttons/glutton-kusama/Cargo.toml
index f86a9159d1..1399159633 100644
--- a/system-parachains/gluttons/glutton-kusama/Cargo.toml
+++ b/system-parachains/gluttons/glutton-kusama/Cargo.toml
@@ -46,6 +46,7 @@ cumulus-pallet-xcm = { default-features = false , version = "0.4.0" }
 cumulus-primitives-core = { default-features = false , version = "0.4.0" }
 parachain-info = { package = "staging-parachain-info", default-features = false , version = "0.4.0" }
 parachains-common = { default-features = false , version = "4.0.0" }
+system-parachains-constants = { path = "../../constants", default-features = false }
 
 [build-dependencies]
 substrate-wasm-builder = { version = "14.0.0" }
@@ -94,6 +95,7 @@ std = [
 	"sp-storage/std",
 	"sp-transaction-pool/std",
 	"sp-version/std",
+	"system-parachains-constants/std",
 	"xcm-builder/std",
 	"xcm-executor/std",
 	"xcm/std",

From 7f86f41f582f79dfa967d81536fef7c5cec66d10 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?D=C3=B3nal=20Murray?= <donal.murray@parity.io>
Date: Fri, 8 Dec 2023 18:15:32 +0000
Subject: [PATCH 03/12] Actually rename it in workspace

---
 Cargo.lock | 14 +++++++-------
 Cargo.toml |  2 +-
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index dace4df8bf..ae1d2934dc 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -596,7 +596,7 @@ dependencies = [
  "staging-xcm-builder",
  "staging-xcm-executor",
  "substrate-wasm-builder",
- "system-parachains-common",
+ "system-parachains-constants",
 ]
 
 [[package]]
@@ -667,7 +667,7 @@ dependencies = [
  "staging-xcm-builder",
  "staging-xcm-executor",
  "substrate-wasm-builder",
- "system-parachains-common",
+ "system-parachains-constants",
 ]
 
 [[package]]
@@ -1327,7 +1327,7 @@ dependencies = [
  "staging-xcm-builder",
  "staging-xcm-executor",
  "substrate-wasm-builder",
- "system-parachains-common",
+ "system-parachains-constants",
 ]
 
 [[package]]
@@ -1392,7 +1392,7 @@ dependencies = [
  "staging-xcm-builder",
  "staging-xcm-executor",
  "substrate-wasm-builder",
- "system-parachains-common",
+ "system-parachains-constants",
 ]
 
 [[package]]
@@ -1894,7 +1894,7 @@ dependencies = [
  "staging-xcm-builder",
  "staging-xcm-executor",
  "substrate-wasm-builder",
- "system-parachains-common",
+ "system-parachains-constants",
 ]
 
 [[package]]
@@ -3966,7 +3966,7 @@ dependencies = [
  "staging-xcm-builder",
  "staging-xcm-executor",
  "substrate-wasm-builder",
- "system-parachains-common",
+ "system-parachains-constants",
 ]
 
 [[package]]
@@ -11835,7 +11835,7 @@ dependencies = [
 ]
 
 [[package]]
-name = "system-parachains-common"
+name = "system-parachains-constants"
 version = "1.0.0"
 dependencies = [
  "frame-support",
diff --git a/Cargo.toml b/Cargo.toml
index 994a3df509..77c699d3c0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,7 +18,7 @@ members = [
 	"system-parachains/bridge-hubs/bridge-hub-kusama",
 	"system-parachains/bridge-hubs/bridge-hub-polkadot",
 	"system-parachains/collectives/collectives-polkadot",
-	"system-parachains/common",
+	"system-parachains/constants",
 	"system-parachains/gluttons/glutton-kusama",
 ]
 

From 1e6da9996a45959a46ee866999c94829102da09e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?D=C3=B3nal=20Murray?= <donal.murray@parity.io>
Date: Fri, 8 Dec 2023 18:33:11 +0000
Subject: [PATCH 04/12] Use constants from fellowship crate

---
 .../asset-hubs/asset-hub-kusama/src/lib.rs        | 15 +++++++++------
 .../asset-hubs/asset-hub-kusama/src/xcm_config.rs |  2 +-
 .../asset-hubs/asset-hub-kusama/tests/tests.rs    |  5 ++---
 .../asset-hubs/asset-hub-polkadot/src/lib.rs      | 13 +++++++++----
 .../asset-hub-polkadot/src/xcm_config.rs          |  2 +-
 .../asset-hubs/asset-hub-polkadot/tests/tests.rs  |  4 ++--
 .../bridge-hubs/bridge-hub-kusama/src/lib.rs      |  7 ++++---
 .../bridge-hub-kusama/src/xcm_config.rs           |  2 +-
 .../bridge-hubs/bridge-hub-kusama/tests/tests.rs  |  3 ++-
 .../bridge-hubs/bridge-hub-polkadot/src/lib.rs    |  7 ++++---
 .../bridge-hub-polkadot/src/xcm_config.rs         |  2 +-
 .../bridge-hub-polkadot/tests/tests.rs            |  3 ++-
 .../collectives-polkadot/src/fellowship/mod.rs    |  2 +-
 .../collectives/collectives-polkadot/src/lib.rs   |  8 +++++---
 .../collectives-polkadot/src/xcm_config.rs        |  2 +-
 15 files changed, 45 insertions(+), 32 deletions(-)

diff --git a/system-parachains/asset-hubs/asset-hub-kusama/src/lib.rs b/system-parachains/asset-hubs/asset-hub-kusama/src/lib.rs
index 1d03f75a01..af33dcb8cf 100644
--- a/system-parachains/asset-hubs/asset-hub-kusama/src/lib.rs
+++ b/system-parachains/asset-hubs/asset-hub-kusama/src/lib.rs
@@ -67,15 +67,18 @@ use frame_system::{
 };
 use pallet_asset_conversion_tx_payment::AssetConversionAdapter;
 use pallet_nfts::PalletFeatures;
+// TODO make combined mod to re-export
 pub use parachains_common as common;
 use parachains_common::{
-	impls::DealWithFees,
-	kusama::{consensus::*, currency::*, fee::WeightToFee},
-	AccountId, AssetIdForTrustBackedAssets, AuraId, Balance, BlockNumber, Hash, Header, Nonce,
-	Signature, AVERAGE_ON_INITIALIZE_RATIO, DAYS, HOURS, MAXIMUM_BLOCK_WEIGHT,
-	NORMAL_DISPATCH_RATIO, SLOT_DURATION,
+	impls::DealWithFees, AccountId, AssetIdForTrustBackedAssets, AuraId, Balance, BlockNumber,
+	Hash, Header, Nonce, Signature,
 };
 use sp_runtime::RuntimeDebug;
+use system_parachains_constants::{
+	kusama::{consensus::*, currency::*, fee::WeightToFee},
+	AVERAGE_ON_INITIALIZE_RATIO, DAYS, HOURS, MAXIMUM_BLOCK_WEIGHT, NORMAL_DISPATCH_RATIO,
+	SLOT_DURATION,
+};
 use xcm::opaque::v3::MultiLocation;
 use xcm_config::{
 	FellowshipLocation, ForeignAssetsConvertedConcreteId, GovernanceLocation, KsmLocation,
@@ -1483,9 +1486,9 @@ fn ensure_key_ss58() {
 mod tests {
 	use super::*;
 	use crate::{CENTS, MILLICENTS};
-	use parachains_common::kusama::fee;
 	use sp_runtime::traits::Zero;
 	use sp_weights::WeightToFee;
+	use system_parachains_constants::kusama::fee;
 
 	/// We can fit at least 1000 transfers in a block.
 	#[test]
diff --git a/system-parachains/asset-hubs/asset-hub-kusama/src/xcm_config.rs b/system-parachains/asset-hubs/asset-hub-kusama/src/xcm_config.rs
index 13fb5bdd8c..f64d61f98b 100644
--- a/system-parachains/asset-hubs/asset-hub-kusama/src/xcm_config.rs
+++ b/system-parachains/asset-hubs/asset-hub-kusama/src/xcm_config.rs
@@ -36,10 +36,10 @@ use parachains_common::{
 		AssetFeeAsExistentialDepositMultiplier, ConcreteAssetFromSystem,
 		RelayOrOtherSystemParachains,
 	},
-	TREASURY_PALLET_ID,
 };
 use polkadot_parachain_primitives::primitives::Sibling;
 use sp_runtime::traits::{AccountIdConversion, ConvertInto};
+use system_parachains_constants::TREASURY_PALLET_ID;
 use xcm::latest::prelude::*;
 use xcm_builder::{
 	AccountId32Aliases, AllowExplicitUnpaidExecutionFrom, AllowKnownQueryResponses,
diff --git a/system-parachains/asset-hubs/asset-hub-kusama/tests/tests.rs b/system-parachains/asset-hubs/asset-hub-kusama/tests/tests.rs
index 20477cb24e..f207fb83de 100644
--- a/system-parachains/asset-hubs/asset-hub-kusama/tests/tests.rs
+++ b/system-parachains/asset-hubs/asset-hub-kusama/tests/tests.rs
@@ -34,10 +34,9 @@ use frame_support::{
 	traits::fungibles::InspectEnumerable,
 	weights::{Weight, WeightToFee as WeightToFeeT},
 };
-use parachains_common::{
-	kusama::fee::WeightToFee, AccountId, AssetIdForTrustBackedAssets, AuraId, Balance,
-};
+use parachains_common::{AccountId, AssetIdForTrustBackedAssets, AuraId, Balance};
 use sp_runtime::traits::MaybeEquivalence;
+use system_parachains_constants::kusama::fee::WeightToFee;
 use xcm::latest::prelude::*;
 use xcm_executor::traits::{Identity, JustTry, WeightTrader};
 
diff --git a/system-parachains/asset-hubs/asset-hub-polkadot/src/lib.rs b/system-parachains/asset-hubs/asset-hub-polkadot/src/lib.rs
index 2c62e27069..e05e9edf30 100644
--- a/system-parachains/asset-hubs/asset-hub-polkadot/src/lib.rs
+++ b/system-parachains/asset-hubs/asset-hub-polkadot/src/lib.rs
@@ -98,15 +98,20 @@ use frame_system::{
 	EnsureRoot, EnsureSigned,
 };
 use pallet_nfts::PalletFeatures;
+// TODO make combined mod to re-export
 pub use parachains_common as common;
 use parachains_common::{
 	impls::{AssetsToBlockAuthor, DealWithFees},
-	polkadot::{consensus::*, currency::*, fee::WeightToFee},
 	AccountId, AssetHubPolkadotAuraId as AuraId, AssetIdForTrustBackedAssets, Balance, BlockNumber,
-	Hash, Header, Nonce, Signature, AVERAGE_ON_INITIALIZE_RATIO, DAYS, HOURS, MAXIMUM_BLOCK_WEIGHT,
-	NORMAL_DISPATCH_RATIO, SLOT_DURATION,
+	Hash, Header, Nonce, Signature,
 };
+
 use sp_runtime::RuntimeDebug;
+use system_parachains_constants::{
+	polkadot::{consensus::*, currency::*, fee::WeightToFee},
+	AVERAGE_ON_INITIALIZE_RATIO, DAYS, HOURS, MAXIMUM_BLOCK_WEIGHT, NORMAL_DISPATCH_RATIO,
+	SLOT_DURATION,
+};
 use xcm_config::{
 	DotLocation, FellowshipLocation, ForeignAssetsConvertedConcreteId, GovernanceLocation,
 	TrustBackedAssetsConvertedConcreteId, XcmConfig, XcmOriginToTransactDispatchOrigin,
@@ -1317,9 +1322,9 @@ cumulus_pallet_parachain_system::register_validate_block! {
 mod tests {
 	use super::*;
 	use crate::{CENTS, MILLICENTS};
-	use parachains_common::polkadot::fee;
 	use sp_runtime::traits::Zero;
 	use sp_weights::WeightToFee;
+	use system_parachains_constants::polkadot::fee;
 
 	/// We can fit at least 1000 transfers in a block.
 	#[test]
diff --git a/system-parachains/asset-hubs/asset-hub-polkadot/src/xcm_config.rs b/system-parachains/asset-hubs/asset-hub-polkadot/src/xcm_config.rs
index 92776aa1dc..3ae0ef162d 100644
--- a/system-parachains/asset-hubs/asset-hub-polkadot/src/xcm_config.rs
+++ b/system-parachains/asset-hubs/asset-hub-polkadot/src/xcm_config.rs
@@ -31,11 +31,11 @@ use parachains_common::{
 		AssetFeeAsExistentialDepositMultiplier, ConcreteAssetFromSystem,
 		RelayOrOtherSystemParachains,
 	},
-	TREASURY_PALLET_ID,
 };
 use polkadot_parachain_primitives::primitives::Sibling;
 use polkadot_runtime_constants::system_parachain;
 use sp_runtime::traits::{AccountIdConversion, ConvertInto};
+use system_parachains_constants::TREASURY_PALLET_ID;
 use xcm::latest::prelude::*;
 use xcm_builder::{
 	AccountId32Aliases, AllowExplicitUnpaidExecutionFrom, AllowKnownQueryResponses,
diff --git a/system-parachains/asset-hubs/asset-hub-polkadot/tests/tests.rs b/system-parachains/asset-hubs/asset-hub-polkadot/tests/tests.rs
index 5af2c63c18..c56381e099 100644
--- a/system-parachains/asset-hubs/asset-hub-polkadot/tests/tests.rs
+++ b/system-parachains/asset-hubs/asset-hub-polkadot/tests/tests.rs
@@ -35,10 +35,10 @@ use frame_support::{
 	weights::{Weight, WeightToFee as WeightToFeeT},
 };
 use parachains_common::{
-	polkadot::fee::WeightToFee, AccountId, AssetHubPolkadotAuraId as AuraId,
-	AssetIdForTrustBackedAssets, Balance,
+	AccountId, AssetHubPolkadotAuraId as AuraId, AssetIdForTrustBackedAssets, Balance,
 };
 use sp_runtime::traits::MaybeEquivalence;
+use system_parachains_constants::polkadot::fee::WeightToFee;
 use xcm::latest::prelude::*;
 use xcm_executor::traits::{Identity, JustTry, WeightTrader};
 
diff --git a/system-parachains/bridge-hubs/bridge-hub-kusama/src/lib.rs b/system-parachains/bridge-hubs/bridge-hub-kusama/src/lib.rs
index f0d5f8a3cb..8a694b432e 100644
--- a/system-parachains/bridge-hubs/bridge-hub-kusama/src/lib.rs
+++ b/system-parachains/bridge-hubs/bridge-hub-kusama/src/lib.rs
@@ -68,10 +68,11 @@ use polkadot_runtime_common::{BlockHashCount, SlowAdjustingFeeUpdate};
 use weights::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight};
 
 use parachains_common::{
-	impls::DealWithFees,
+	impls::DealWithFees, AccountId, Balance, BlockNumber, Hash, Header, Nonce, Signature,
+};
+use system_parachains_constants::{
 	kusama::{consensus::*, currency::*, fee::WeightToFee},
-	AccountId, Balance, BlockNumber, Hash, Header, Nonce, Signature, AVERAGE_ON_INITIALIZE_RATIO,
-	HOURS, MAXIMUM_BLOCK_WEIGHT, NORMAL_DISPATCH_RATIO, SLOT_DURATION,
+	AVERAGE_ON_INITIALIZE_RATIO, HOURS, MAXIMUM_BLOCK_WEIGHT, NORMAL_DISPATCH_RATIO, SLOT_DURATION,
 };
 
 // XCM Imports
diff --git a/system-parachains/bridge-hubs/bridge-hub-kusama/src/xcm_config.rs b/system-parachains/bridge-hubs/bridge-hub-kusama/src/xcm_config.rs
index 3a1ac9c8b1..a6085806f6 100644
--- a/system-parachains/bridge-hubs/bridge-hub-kusama/src/xcm_config.rs
+++ b/system-parachains/bridge-hubs/bridge-hub-kusama/src/xcm_config.rs
@@ -29,10 +29,10 @@ use pallet_xcm::XcmPassthrough;
 use parachains_common::{
 	impls::ToStakingPot,
 	xcm_config::{ConcreteAssetFromSystem, RelayOrOtherSystemParachains},
-	TREASURY_PALLET_ID,
 };
 use polkadot_parachain_primitives::primitives::Sibling;
 use sp_runtime::traits::AccountIdConversion;
+use system_parachains_constants::TREASURY_PALLET_ID;
 use xcm::latest::prelude::*;
 use xcm_builder::{
 	AccountId32Aliases, AllowExplicitUnpaidExecutionFrom, AllowKnownQueryResponses,
diff --git a/system-parachains/bridge-hubs/bridge-hub-kusama/tests/tests.rs b/system-parachains/bridge-hubs/bridge-hub-kusama/tests/tests.rs
index 893524e12f..54ebc96a7a 100644
--- a/system-parachains/bridge-hubs/bridge-hub-kusama/tests/tests.rs
+++ b/system-parachains/bridge-hubs/bridge-hub-kusama/tests/tests.rs
@@ -20,7 +20,8 @@ pub use bridge_hub_kusama_runtime::{
 };
 use codec::Decode;
 use frame_support::parameter_types;
-use parachains_common::{kusama::fee::WeightToFee, AccountId, AuraId};
+use parachains_common::{AccountId, AuraId};
+use system_parachains_constants::kusama::fee::WeightToFee;
 
 const ALICE: [u8; 32] = [1u8; 32];
 
diff --git a/system-parachains/bridge-hubs/bridge-hub-polkadot/src/lib.rs b/system-parachains/bridge-hubs/bridge-hub-polkadot/src/lib.rs
index a811d768bd..8b93995261 100644
--- a/system-parachains/bridge-hubs/bridge-hub-polkadot/src/lib.rs
+++ b/system-parachains/bridge-hubs/bridge-hub-polkadot/src/lib.rs
@@ -69,10 +69,11 @@ use polkadot_runtime_common::{BlockHashCount, SlowAdjustingFeeUpdate};
 use weights::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight};
 
 use parachains_common::{
-	impls::DealWithFees,
+	impls::DealWithFees, AccountId, Balance, BlockNumber, Hash, Header, Nonce, Signature,
+};
+use system_parachains_constants::{
 	polkadot::{consensus::*, currency::*, fee::WeightToFee},
-	AccountId, Balance, BlockNumber, Hash, Header, Nonce, Signature, AVERAGE_ON_INITIALIZE_RATIO,
-	HOURS, MAXIMUM_BLOCK_WEIGHT, NORMAL_DISPATCH_RATIO, SLOT_DURATION,
+	AVERAGE_ON_INITIALIZE_RATIO, HOURS, MAXIMUM_BLOCK_WEIGHT, NORMAL_DISPATCH_RATIO, SLOT_DURATION,
 };
 // XCM Imports
 use xcm::prelude::*;
diff --git a/system-parachains/bridge-hubs/bridge-hub-polkadot/src/xcm_config.rs b/system-parachains/bridge-hubs/bridge-hub-polkadot/src/xcm_config.rs
index be8f1dfa00..853cf81600 100644
--- a/system-parachains/bridge-hubs/bridge-hub-polkadot/src/xcm_config.rs
+++ b/system-parachains/bridge-hubs/bridge-hub-polkadot/src/xcm_config.rs
@@ -28,11 +28,11 @@ use pallet_xcm::XcmPassthrough;
 use parachains_common::{
 	impls::ToStakingPot,
 	xcm_config::{ConcreteAssetFromSystem, RelayOrOtherSystemParachains},
-	TREASURY_PALLET_ID,
 };
 use polkadot_parachain_primitives::primitives::Sibling;
 use polkadot_runtime_constants::system_parachain;
 use sp_runtime::traits::AccountIdConversion;
+use system_parachains_constants::TREASURY_PALLET_ID;
 use xcm::latest::prelude::*;
 use xcm_builder::{
 	AccountId32Aliases, AllowExplicitUnpaidExecutionFrom, AllowKnownQueryResponses,
diff --git a/system-parachains/bridge-hubs/bridge-hub-polkadot/tests/tests.rs b/system-parachains/bridge-hubs/bridge-hub-polkadot/tests/tests.rs
index 0be87bd46f..1529f77025 100644
--- a/system-parachains/bridge-hubs/bridge-hub-polkadot/tests/tests.rs
+++ b/system-parachains/bridge-hubs/bridge-hub-polkadot/tests/tests.rs
@@ -20,7 +20,8 @@ pub use bridge_hub_polkadot_runtime::{
 };
 use codec::Decode;
 use frame_support::parameter_types;
-use parachains_common::{polkadot::fee::WeightToFee, AccountId, AuraId};
+use parachains_common::{AccountId, AuraId};
+use system_parachains_constants::polkadot::fee::WeightToFee;
 
 const ALICE: [u8; 32] = [1u8; 32];
 
diff --git a/system-parachains/collectives/collectives-polkadot/src/fellowship/mod.rs b/system-parachains/collectives/collectives-polkadot/src/fellowship/mod.rs
index f8abba46e2..2b684cd6d7 100644
--- a/system-parachains/collectives/collectives-polkadot/src/fellowship/mod.rs
+++ b/system-parachains/collectives/collectives-polkadot/src/fellowship/mod.rs
@@ -35,10 +35,10 @@ pub use origins::{
 };
 use pallet_ranked_collective::EnsureOfRank;
 use pallet_xcm::{EnsureXcm, IsVoiceOfBody};
-use parachains_common::polkadot::account;
 use polkadot_runtime_constants::{time::HOURS, xcm::body::FELLOWSHIP_ADMIN_INDEX};
 use sp_core::{ConstU128, ConstU32};
 use sp_runtime::traits::{AccountIdConversion, ConstU16, ConvertToValue, Replace, TakeFirst};
+use system_parachains_constants::polkadot::account;
 use xcm::latest::BodyId;
 use xcm_builder::{AliasesIntoAccountId32, LocatableAssetId, PayOverXcm};
 
diff --git a/system-parachains/collectives/collectives-polkadot/src/lib.rs b/system-parachains/collectives/collectives-polkadot/src/lib.rs
index c3d12985ef..819e6bda00 100644
--- a/system-parachains/collectives/collectives-polkadot/src/lib.rs
+++ b/system-parachains/collectives/collectives-polkadot/src/lib.rs
@@ -76,15 +76,17 @@ use frame_system::{
 	limits::{BlockLength, BlockWeights},
 	EnsureRoot,
 };
+// TODO make combined mod to re-export
 pub use parachains_common as common;
 use parachains_common::{
-	impls::DealWithFees,
+	impls::DealWithFees, AccountId, AuraId, Balance, BlockNumber, Hash, Header, Nonce, Signature,
+};
+use sp_runtime::RuntimeDebug;
+use system_parachains_constants::{
 	polkadot::{account::*, consensus::*, currency::*, fee::WeightToFee},
-	AccountId, AuraId, Balance, BlockNumber, Hash, Header, Nonce, Signature,
 	AVERAGE_ON_INITIALIZE_RATIO, DAYS, HOURS, MAXIMUM_BLOCK_WEIGHT, MINUTES, NORMAL_DISPATCH_RATIO,
 	SLOT_DURATION,
 };
-use sp_runtime::RuntimeDebug;
 use xcm_config::{GovernanceLocation, XcmConfig, XcmOriginToTransactDispatchOrigin};
 
 #[cfg(any(feature = "std", test))]
diff --git a/system-parachains/collectives/collectives-polkadot/src/xcm_config.rs b/system-parachains/collectives/collectives-polkadot/src/xcm_config.rs
index c609b491d1..0832b627ff 100644
--- a/system-parachains/collectives/collectives-polkadot/src/xcm_config.rs
+++ b/system-parachains/collectives/collectives-polkadot/src/xcm_config.rs
@@ -28,11 +28,11 @@ use pallet_xcm::XcmPassthrough;
 use parachains_common::{
 	impls::ToStakingPot,
 	xcm_config::{ConcreteAssetFromSystem, RelayOrOtherSystemParachains},
-	TREASURY_PALLET_ID,
 };
 use polkadot_parachain_primitives::primitives::Sibling;
 use polkadot_runtime_constants::system_parachain;
 use sp_runtime::traits::AccountIdConversion;
+use system_parachains_constants::TREASURY_PALLET_ID;
 use xcm::latest::prelude::*;
 use xcm_builder::{
 	AccountId32Aliases, AllowExplicitUnpaidExecutionFrom, AllowKnownQueryResponses,

From 094bcec9de0f4d2dd11364e44fe4c05ce7718bcf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?D=C3=B3nal=20Murray?= <donal.murray@parity.io>
Date: Tue, 12 Dec 2023 15:47:11 +0000
Subject: [PATCH 05/12] Add explicitly ignored file

---
 system-parachains/constants/src/polkadot.rs | 144 ++++++++++++++++++++
 1 file changed, 144 insertions(+)
 create mode 100644 system-parachains/constants/src/polkadot.rs

diff --git a/system-parachains/constants/src/polkadot.rs b/system-parachains/constants/src/polkadot.rs
new file mode 100644
index 0000000000..ca41383034
--- /dev/null
+++ b/system-parachains/constants/src/polkadot.rs
@@ -0,0 +1,144 @@
+// 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.
+
+/// Universally recognized accounts.
+pub mod account {
+	use frame_support::PalletId;
+
+	/// Polkadot treasury pallet id, used to convert into AccountId
+	pub const POLKADOT_TREASURY_PALLET_ID: PalletId = PalletId(*b"py/trsry");
+	/// Alliance pallet ID.
+	/// It is used as a temporarily place to deposit a slashed imbalance
+	/// before the teleport to the Treasury.
+	pub const ALLIANCE_PALLET_ID: PalletId = PalletId(*b"py/allia");
+	/// Referenda pallet ID.
+	/// It is used as a temporarily place to deposit a slashed imbalance
+	/// before the teleport to the Treasury.
+	pub const REFERENDA_PALLET_ID: PalletId = PalletId(*b"py/refer");
+	/// Ambassador Referenda pallet ID.
+	/// It is used as a temporarily place to deposit a slashed imbalance
+	/// before the teleport to the Treasury.
+	pub const AMBASSADOR_REFERENDA_PALLET_ID: PalletId = PalletId(*b"py/amref");
+	/// Fellowship treasury pallet ID
+	pub const FELLOWSHIP_TREASURY_PALLET_ID: PalletId = PalletId(*b"py/feltr");
+}
+
+/// Consensus-related.
+pub mod consensus {
+	/// Maximum number of blocks simultaneously accepted by the Runtime, not yet included
+	/// into the relay chain.
+	pub const UNINCLUDED_SEGMENT_CAPACITY: u32 = 1;
+	/// How many parachain blocks are processed by the relay chain per parent. Limits the
+	/// number of blocks authored per slot.
+	pub const BLOCK_PROCESSING_VELOCITY: u32 = 1;
+	/// Relay chain slot duration, in milliseconds.
+	pub const RELAY_CHAIN_SLOT_DURATION_MILLIS: u32 = 6000;
+}
+
+/// Constants relating to DOT.
+pub mod currency {
+	use polkadot_core_primitives::Balance;
+
+	/// The existential deposit. Set to 1/10 of its parent Relay Chain.
+	pub const EXISTENTIAL_DEPOSIT: Balance = 100 * CENTS / 10;
+
+	pub const UNITS: Balance = 10_000_000_000;
+	pub const DOLLARS: Balance = UNITS; // 10_000_000_000
+	pub const GRAND: Balance = DOLLARS * 1_000; // 10_000_000_000_000
+	pub const CENTS: Balance = DOLLARS / 100; // 100_000_000
+	pub const MILLICENTS: Balance = CENTS / 1_000; // 100_000
+
+	pub const fn deposit(items: u32, bytes: u32) -> Balance {
+		// 1/100 of Polkadot
+		(items as Balance * 20 * DOLLARS + (bytes as Balance) * 100 * MILLICENTS) / 100
+	}
+}
+
+/// Constants related to Polkadot fee payment.
+pub mod fee {
+	use frame_support::{
+		pallet_prelude::Weight,
+		weights::{
+			constants::ExtrinsicBaseWeight, FeePolynomial, WeightToFeeCoefficient,
+			WeightToFeeCoefficients, WeightToFeePolynomial,
+		},
+	};
+	use polkadot_core_primitives::Balance;
+	use smallvec::smallvec;
+	pub use sp_runtime::Perbill;
+
+	/// 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, MAXIMUM_BLOCK_WEIGHT]
+	///   - [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 frame_support::weights::WeightToFee for WeightToFee {
+		type Balance = Balance;
+
+		fn weight_to_fee(weight: &Weight) -> Self::Balance {
+			let time_poly: FeePolynomial<Balance> = RefTimeToFee::polynomial().into();
+			let proof_poly: FeePolynomial<Balance> = ProofSizeToFee::polynomial().into();
+
+			// Take the maximum instead of the sum to charge by the more scarce resource.
+			time_poly.eval(weight.ref_time()).max(proof_poly.eval(weight.proof_size()))
+		}
+	}
+
+	/// Maps the reference time component of `Weight` to a fee.
+	pub struct RefTimeToFee;
+	impl WeightToFeePolynomial for RefTimeToFee {
+		type Balance = Balance;
+		fn polynomial() -> WeightToFeeCoefficients<Self::Balance> {
+			// In Polkadot, extrinsic base weight (smallest non-zero weight) is mapped to 1/10 CENT:
+			// The standard system parachain configuration is 1/10 of that, as in 1/100 CENT.
+			let p = super::currency::CENTS;
+			let q = 100 * Balance::from(ExtrinsicBaseWeight::get().ref_time());
+
+			smallvec![WeightToFeeCoefficient {
+				degree: 1,
+				negative: false,
+				coeff_frac: Perbill::from_rational(p % q, q),
+				coeff_integer: p / q,
+			}]
+		}
+	}
+
+	/// Maps the proof size component of `Weight` to a fee.
+	pub struct ProofSizeToFee;
+	impl WeightToFeePolynomial for ProofSizeToFee {
+		type Balance = Balance;
+		fn polynomial() -> WeightToFeeCoefficients<Self::Balance> {
+			// Map 10kb proof to 1 CENT.
+			let p = super::currency::CENTS;
+			let q = 10_000;
+
+			smallvec![WeightToFeeCoefficient {
+				degree: 1,
+				negative: false,
+				coeff_frac: Perbill::from_rational(p % q, q),
+				coeff_integer: p / q,
+			}]
+		}
+	}
+}

From 9736cb02b2da2034ab199557bdd7e2f4f3b27106 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?D=C3=B3nal=20Murray?= <donal.murray@parity.io>
Date: Wed, 13 Dec 2023 09:53:14 +0000
Subject: [PATCH 06/12] Use relay ED and deposit calculations in system
 parachains

---
 Cargo.lock                                                | 2 ++
 .../collectives/collectives-polkadot/Cargo.toml           | 6 +++---
 system-parachains/constants/Cargo.toml                    | 4 ++++
 system-parachains/constants/src/kusama.rs                 | 8 ++++----
 system-parachains/constants/src/polkadot.rs               | 8 ++++----
 5 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index ed063a7afb..0c68e51ba3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -11846,9 +11846,11 @@ name = "system-parachains-constants"
 version = "1.0.0"
 dependencies = [
  "frame-support",
+ "kusama-runtime-constants",
  "parachains-common",
  "polkadot-core-primitives",
  "polkadot-primitives",
+ "polkadot-runtime-constants",
  "smallvec",
  "sp-runtime",
 ]
diff --git a/system-parachains/collectives/collectives-polkadot/Cargo.toml b/system-parachains/collectives/collectives-polkadot/Cargo.toml
index cd66f78262..d45f676231 100644
--- a/system-parachains/collectives/collectives-polkadot/Cargo.toml
+++ b/system-parachains/collectives/collectives-polkadot/Cargo.toml
@@ -95,8 +95,8 @@ runtime-benchmarks = [
 	"frame-support/runtime-benchmarks",
 	"frame-system-benchmarking/runtime-benchmarks",
 	"frame-system/runtime-benchmarks",
-	"pallet-asset-rate/runtime-benchmarks",
 	"pallet-alliance/runtime-benchmarks",
+	"pallet-asset-rate/runtime-benchmarks",
 	"pallet-balances/runtime-benchmarks",
 	"pallet-collator-selection/runtime-benchmarks",
 	"pallet-collective/runtime-benchmarks",
@@ -128,8 +128,8 @@ try-runtime = [
 	"frame-support/try-runtime",
 	"frame-system/try-runtime",
 	"frame-try-runtime/try-runtime",
-	"pallet-asset-rate/try-runtime",
 	"pallet-alliance/try-runtime",
+	"pallet-asset-rate/try-runtime",
 	"pallet-aura/try-runtime",
 	"pallet-authorship/try-runtime",
 	"pallet-balances/try-runtime",
@@ -171,8 +171,8 @@ std = [
 	"frame-system/std",
 	"frame-try-runtime?/std",
 	"log/std",
-	"pallet-asset-rate/std",
 	"pallet-alliance/std",
+	"pallet-asset-rate/std",
 	"pallet-aura/std",
 	"pallet-authorship/std",
 	"pallet-balances/std",
diff --git a/system-parachains/constants/Cargo.toml b/system-parachains/constants/Cargo.toml
index 2721f0a19c..3946d0cc17 100644
--- a/system-parachains/constants/Cargo.toml
+++ b/system-parachains/constants/Cargo.toml
@@ -16,6 +16,8 @@ sp-runtime = { default-features = false , version = "28.0.0" }
 # Polkadot
 polkadot-core-primitives = { default-features = false, version = "4.0.0"}
 polkadot-primitives = { default-features = false , version = "4.0.0" }
+polkadot-runtime-constants = { path = "../../relay/polkadot/constants", default-features = false}
+kusama-runtime-constants = { path = "../../relay/kusama/constants", default-features = false}
 
 # Cumulus
 parachains-common = { default-features = false , version = "4.0.0" }
@@ -24,8 +26,10 @@ parachains-common = { default-features = false , version = "4.0.0" }
 default = [ "std" ]
 std = [
 	"frame-support/std",
+	"kusama-runtime-constants/std",
 	"parachains-common/std",
 	"polkadot-core-primitives/std",
 	"polkadot-primitives/std",
+	"polkadot-runtime-constants/std",
 	"sp-runtime/std",
 ]
diff --git a/system-parachains/constants/src/kusama.rs b/system-parachains/constants/src/kusama.rs
index 073971a707..2b91f06d79 100644
--- a/system-parachains/constants/src/kusama.rs
+++ b/system-parachains/constants/src/kusama.rs
@@ -29,8 +29,9 @@ pub mod consensus {
 pub mod currency {
 	use polkadot_core_primitives::Balance;
 
-	/// The existential deposit. Set to 1/10 of its parent Relay Chain.
-	pub const EXISTENTIAL_DEPOSIT: Balance = 1 * CENTS / 10;
+	/// The existential deposit.
+	pub const EXISTENTIAL_DEPOSIT: Balance =
+		kusama_runtime_constants::currency::EXISTENTIAL_DEPOSIT / 10;
 
 	pub const UNITS: Balance = 1_000_000_000_000;
 	pub const QUID: Balance = UNITS / 30;
@@ -39,8 +40,7 @@ pub mod currency {
 	pub const MILLICENTS: Balance = CENTS / 1_000;
 
 	pub const fn deposit(items: u32, bytes: u32) -> Balance {
-		// map to 1/100 of what the kusama relay chain charges (v9020)
-		(items as Balance * 2_000 * CENTS + (bytes as Balance) * 100 * MILLICENTS) / 100
+		kusama_runtime_constants::currency::deposit(items, bytes) / 100
 	}
 }
 
diff --git a/system-parachains/constants/src/polkadot.rs b/system-parachains/constants/src/polkadot.rs
index ca41383034..15b3aa66f1 100644
--- a/system-parachains/constants/src/polkadot.rs
+++ b/system-parachains/constants/src/polkadot.rs
@@ -51,8 +51,9 @@ pub mod consensus {
 pub mod currency {
 	use polkadot_core_primitives::Balance;
 
-	/// The existential deposit. Set to 1/10 of its parent Relay Chain.
-	pub const EXISTENTIAL_DEPOSIT: Balance = 100 * CENTS / 10;
+	/// The existential deposit.
+	pub const EXISTENTIAL_DEPOSIT: Balance =
+		polkadot_runtime_constants::currency::EXISTENTIAL_DEPOSIT / 10;
 
 	pub const UNITS: Balance = 10_000_000_000;
 	pub const DOLLARS: Balance = UNITS; // 10_000_000_000
@@ -61,8 +62,7 @@ pub mod currency {
 	pub const MILLICENTS: Balance = CENTS / 1_000; // 100_000
 
 	pub const fn deposit(items: u32, bytes: u32) -> Balance {
-		// 1/100 of Polkadot
-		(items as Balance * 20 * DOLLARS + (bytes as Balance) * 100 * MILLICENTS) / 100
+		polkadot_runtime_constants::currency::deposit(items, bytes) / 100
 	}
 }
 

From 40f4ac0625164d32d66eeb0902a4626e37626e67 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?D=C3=B3nal=20Murray?= <donal.murray@parity.io>
Date: Thu, 21 Dec 2023 10:25:41 +0000
Subject: [PATCH 07/12] Remove re-exports

These should be imported from parachains_common directly, not through the runtimes.
---
 system-parachains/asset-hubs/asset-hub-kusama/src/lib.rs      | 2 --
 system-parachains/asset-hubs/asset-hub-polkadot/src/lib.rs    | 2 --
 system-parachains/collectives/collectives-polkadot/src/lib.rs | 2 --
 3 files changed, 6 deletions(-)

diff --git a/system-parachains/asset-hubs/asset-hub-kusama/src/lib.rs b/system-parachains/asset-hubs/asset-hub-kusama/src/lib.rs
index af33dcb8cf..45baa5a16e 100644
--- a/system-parachains/asset-hubs/asset-hub-kusama/src/lib.rs
+++ b/system-parachains/asset-hubs/asset-hub-kusama/src/lib.rs
@@ -67,8 +67,6 @@ use frame_system::{
 };
 use pallet_asset_conversion_tx_payment::AssetConversionAdapter;
 use pallet_nfts::PalletFeatures;
-// TODO make combined mod to re-export
-pub use parachains_common as common;
 use parachains_common::{
 	impls::DealWithFees, AccountId, AssetIdForTrustBackedAssets, AuraId, Balance, BlockNumber,
 	Hash, Header, Nonce, Signature,
diff --git a/system-parachains/asset-hubs/asset-hub-polkadot/src/lib.rs b/system-parachains/asset-hubs/asset-hub-polkadot/src/lib.rs
index e05e9edf30..8dc01e93e3 100644
--- a/system-parachains/asset-hubs/asset-hub-polkadot/src/lib.rs
+++ b/system-parachains/asset-hubs/asset-hub-polkadot/src/lib.rs
@@ -98,8 +98,6 @@ use frame_system::{
 	EnsureRoot, EnsureSigned,
 };
 use pallet_nfts::PalletFeatures;
-// TODO make combined mod to re-export
-pub use parachains_common as common;
 use parachains_common::{
 	impls::{AssetsToBlockAuthor, DealWithFees},
 	AccountId, AssetHubPolkadotAuraId as AuraId, AssetIdForTrustBackedAssets, Balance, BlockNumber,
diff --git a/system-parachains/collectives/collectives-polkadot/src/lib.rs b/system-parachains/collectives/collectives-polkadot/src/lib.rs
index 6d8dc1b11c..1a0e82c052 100644
--- a/system-parachains/collectives/collectives-polkadot/src/lib.rs
+++ b/system-parachains/collectives/collectives-polkadot/src/lib.rs
@@ -77,8 +77,6 @@ use frame_system::{
 	limits::{BlockLength, BlockWeights},
 	EnsureRoot,
 };
-// TODO make combined mod to re-export
-pub use parachains_common as common;
 use parachains_common::{
 	impls::DealWithFees, AccountId, AuraId, Balance, BlockNumber, Hash, Header, Nonce, Signature,
 };

From afa38574fe34b31377b840c2ccf6a20f9de0f6a0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?D=C3=B3nal=20Murray?= <donal.murray@parity.io>
Date: Wed, 3 Jan 2024 11:06:20 +0000
Subject: [PATCH 08/12] Propagate changes from people pallet addition

---
 system-parachains/constants/src/polkadot.rs | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/system-parachains/constants/src/polkadot.rs b/system-parachains/constants/src/polkadot.rs
index 15b3aa66f1..dfca992715 100644
--- a/system-parachains/constants/src/polkadot.rs
+++ b/system-parachains/constants/src/polkadot.rs
@@ -20,17 +20,17 @@ pub mod account {
 	/// Polkadot treasury pallet id, used to convert into AccountId
 	pub const POLKADOT_TREASURY_PALLET_ID: PalletId = PalletId(*b"py/trsry");
 	/// Alliance pallet ID.
-	/// It is used as a temporarily place to deposit a slashed imbalance
-	/// before the teleport to the Treasury.
+	/// Used as a temporary place to deposit a slashed imbalance before teleporting to the Treasury.
 	pub const ALLIANCE_PALLET_ID: PalletId = PalletId(*b"py/allia");
 	/// Referenda pallet ID.
-	/// It is used as a temporarily place to deposit a slashed imbalance
-	/// before the teleport to the Treasury.
+	/// Used as a temporary place to deposit a slashed imbalance before teleporting to the Treasury.
 	pub const REFERENDA_PALLET_ID: PalletId = PalletId(*b"py/refer");
 	/// Ambassador Referenda pallet ID.
-	/// It is used as a temporarily place to deposit a slashed imbalance
-	/// before the teleport to the Treasury.
+	/// Used as a temporary place to deposit a slashed imbalance before teleporting to the Treasury.
 	pub const AMBASSADOR_REFERENDA_PALLET_ID: PalletId = PalletId(*b"py/amref");
+	/// Identity pallet ID.
+	/// Used as a temporary place to deposit a slashed imbalance before teleporting to the Treasury.
+	pub const IDENTITY_PALLET_ID: PalletId = PalletId(*b"py/ident");
 	/// Fellowship treasury pallet ID
 	pub const FELLOWSHIP_TREASURY_PALLET_ID: PalletId = PalletId(*b"py/feltr");
 }

From 6542acb3e22f518882a150eac658f2618ae41f9e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?D=C3=B3nal=20Murray?= <donal.murray@parity.io>
Date: Wed, 3 Jan 2024 13:34:04 +0000
Subject: [PATCH 09/12] Add description

---
 system-parachains/constants/Cargo.toml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/system-parachains/constants/Cargo.toml b/system-parachains/constants/Cargo.toml
index 3946d0cc17..fd3b85813b 100644
--- a/system-parachains/constants/Cargo.toml
+++ b/system-parachains/constants/Cargo.toml
@@ -1,5 +1,6 @@
 [package]
 name = "system-parachains-constants"
+description = "Common constants for System Parachains runtimes"
 repository.workspace = true
 version.workspace = true
 authors.workspace = true

From 0c7db1d1145b17c343616755c94729fb63f81a78 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?D=C3=B3nal=20Murray?= <donalm@seadanda.dev>
Date: Wed, 3 Jan 2024 13:39:52 +0000
Subject: [PATCH 10/12] Apply suggestions from OTY code review

Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
---
 system-parachains/constants/src/kusama.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/system-parachains/constants/src/kusama.rs b/system-parachains/constants/src/kusama.rs
index 2b91f06d79..3ae72f6514 100644
--- a/system-parachains/constants/src/kusama.rs
+++ b/system-parachains/constants/src/kusama.rs
@@ -29,7 +29,7 @@ pub mod consensus {
 pub mod currency {
 	use polkadot_core_primitives::Balance;
 
-	/// The existential deposit.
+	/// The existential deposit. 1/10th of the relay deposit.
 	pub const EXISTENTIAL_DEPOSIT: Balance =
 		kusama_runtime_constants::currency::EXISTENTIAL_DEPOSIT / 10;
 
@@ -39,6 +39,7 @@ pub mod currency {
 	pub const GRAND: Balance = QUID * 1_000;
 	pub const MILLICENTS: Balance = CENTS / 1_000;
 
+	/// Deposit for stored data. 1/100th of the relay deposit.
 	pub const fn deposit(items: u32, bytes: u32) -> Balance {
 		kusama_runtime_constants::currency::deposit(items, bytes) / 100
 	}

From 8a4cedfa1d4319fe17ac95a0a3c4b0d0b56d2cf4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?D=C3=B3nal=20Murray?= <donal.murray@parity.io>
Date: Wed, 3 Jan 2024 13:46:21 +0000
Subject: [PATCH 11/12] Combine and sort polkadot-sdk dependencies

---
 system-parachains/constants/Cargo.toml | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/system-parachains/constants/Cargo.toml b/system-parachains/constants/Cargo.toml
index fd3b85813b..20bd904bf3 100644
--- a/system-parachains/constants/Cargo.toml
+++ b/system-parachains/constants/Cargo.toml
@@ -10,18 +10,13 @@ license.workspace = true
 [dependencies]
 smallvec = "1.8.0"
 
-# Substrate
 frame-support = { default-features = false , version = "25.0.0" }
-sp-runtime = { default-features = false , version = "28.0.0" }
-
-# Polkadot
+kusama-runtime-constants = { path = "../../relay/kusama/constants", default-features = false}
+parachains-common = { default-features = false , version = "4.0.0" }
 polkadot-core-primitives = { default-features = false, version = "4.0.0"}
 polkadot-primitives = { default-features = false , version = "4.0.0" }
 polkadot-runtime-constants = { path = "../../relay/polkadot/constants", default-features = false}
-kusama-runtime-constants = { path = "../../relay/kusama/constants", default-features = false}
-
-# Cumulus
-parachains-common = { default-features = false , version = "4.0.0" }
+sp-runtime = { default-features = false , version = "28.0.0" }
 
 [features]
 default = [ "std" ]

From 332998dbd401f6e7beeb0c76385e9575d24680f7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?D=C3=B3nal=20Murray?= <donal.murray@parity.io>
Date: Wed, 3 Jan 2024 13:49:58 +0000
Subject: [PATCH 12/12] Remove constants mod

---
 system-parachains/constants/src/lib.rs | 77 ++++++++++++--------------
 1 file changed, 35 insertions(+), 42 deletions(-)

diff --git a/system-parachains/constants/src/lib.rs b/system-parachains/constants/src/lib.rs
index 17f3c339bc..d0d320d968 100644
--- a/system-parachains/constants/src/lib.rs
+++ b/system-parachains/constants/src/lib.rs
@@ -19,46 +19,39 @@
 pub mod kusama;
 pub mod polkadot;
 
-pub use constants::*;
-
-/// re-export types from upstream
+use frame_support::{
+	weights::{constants::WEIGHT_REF_TIME_PER_SECOND, Weight},
+	PalletId,
+};
 pub use parachains_common::BlockNumber;
-
-/// Common constants of parachains.
-mod constants {
-	use super::BlockNumber;
-	use frame_support::{
-		weights::{constants::WEIGHT_REF_TIME_PER_SECOND, Weight},
-		PalletId,
-	};
-	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,
-	);
-
-	/// Treasury pallet id of the local chain, used to convert into AccountId
-	pub const TREASURY_PALLET_ID: PalletId = PalletId(*b"py/trsry");
-}
+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,
+);
+
+/// Treasury pallet id of the local chain, used to convert into AccountId
+pub const TREASURY_PALLET_ID: PalletId = PalletId(*b"py/trsry");