[cumulus] parachains-common testnet constants cleaning (#3134)

The `parachains-common` contains a lots of constants and type
definitions which are used for `polkadot-sdk`'s testnet runtimes and
also for `polkadot-fellows`'s production [SP
runtimes](https://github.com/polkadot-fellows/runtimes/tree/main/system-parachains/constants).
This PR cleans `parachains-common` module to contain only common and
generic functionality.

Testnet-specific constants have been moved to the separate module
dedicated just for testnets:
`polkadot-sdk/cumulus/parachains/runtimes/constants/`


Part of: https://github.com/paritytech/polkadot-sdk/issues/3054

---------

Co-authored-by: georgepisaltu <george.pisaltu@parity.io>

cumulus/parachains/runtimes/constants/Cargo.toml

@@ -0,0 +1,41 @@
+[package]
+name = "testnet-parachains-constants"
+version = "1.0.0"
+authors.workspace = true
+edition.workspace = true
+description = "Common constants for Testnet Parachains runtimes"
+license = "Apache-2.0"
+
+[lints]
+workspace = true
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]
+
+[dependencies]
+smallvec = "1.11.0"
+
+# Substrate
+frame-support = { path = "../../../../substrate/frame/support", default-features = false }
+sp-runtime = { path = "../../../../substrate/primitives/runtime", default-features = false }
+
+# Polkadot
+polkadot-core-primitives = { path = "../../../../polkadot/core-primitives", default-features = false }
+rococo-runtime-constants = { path = "../../../../polkadot/runtime/rococo/constants", default-features = false, optional = true }
+westend-runtime-constants = { path = "../../../../polkadot/runtime/westend/constants", default-features = false, optional = true }
+xcm = { package = "staging-xcm", path = "../../../../polkadot/xcm", default-features = false }
+
+[features]
+default = ["std"]
+std = [
+	"frame-support/std",
+	"polkadot-core-primitives/std",
+	"rococo-runtime-constants?/std",
+	"sp-runtime/std",
+	"westend-runtime-constants?/std",
+	"xcm/std",
+]
+
+# Test runtimes specific features.
+rococo = ["rococo-runtime-constants"]
+westend = ["westend-runtime-constants"]

cumulus/parachains/runtimes/constants/src/lib.rs

@@ -0,0 +1,21 @@
+// Copyright (C) Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#![cfg_attr(not(feature = "std"), no_std)]
+
+#[cfg(feature = "rococo")]
+pub mod rococo;
+#[cfg(feature = "westend")]
+pub mod westend;

cumulus/parachains/runtimes/constants/src/rococo.rs

@@ -0,0 +1,135 @@
+// 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.
+
+pub mod currency {
+	use polkadot_core_primitives::Balance;
+	use rococo_runtime_constants as constants;
+
+	/// The existential deposit. Set to 1/10 of its parent Relay Chain (v9010).
+	pub const EXISTENTIAL_DEPOSIT: Balance = constants::currency::EXISTENTIAL_DEPOSIT / 10;
+
+	pub const UNITS: Balance = constants::currency::UNITS;
+	pub const CENTS: Balance = constants::currency::CENTS;
+	pub const MILLICENTS: Balance = constants::currency::MILLICENTS;
+
+	pub const fn deposit(items: u32, bytes: u32) -> Balance {
+		// map to 1/100 of what the rococo relay chain charges
+		constants::currency::deposit(items, bytes) / 100
+	}
+}
+
+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 Rococo, 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,
+			}]
+		}
+	}
+}
+
+/// 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;
+}
+
+pub mod snowbridge {
+	use frame_support::parameter_types;
+	use xcm::opaque::lts::NetworkId;
+
+	/// The pallet index of the Ethereum inbound queue pallet in the bridge hub runtime.
+	pub const INBOUND_QUEUE_PALLET_INDEX: u8 = 80;
+
+	parameter_types! {
+		/// Network and location for the Ethereum chain. On Rococo, the Ethereum chain bridged
+		/// to is the Sepolia Ethereum testnet, with chain ID 11155111.
+		/// <https://chainlist.org/chain/11155111>
+		/// <https://ethereum.org/en/developers/docs/apis/json-rpc/#net_version>
+		pub EthereumNetwork: NetworkId = NetworkId::Ethereum { chain_id: 11155111 };
+	}
+}

cumulus/parachains/runtimes/constants/src/westend.rs

@@ -0,0 +1,142 @@
+// 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;
+
+	/// Westend treasury pallet id, used to convert into AccountId - in Westend as a destination for
+	/// slashed funds.
+	pub const WESTEND_TREASURY_PALLET_ID: PalletId = PalletId(*b"py/trsry");
+	/// Alliance pallet ID - used as a temporary 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 - used as a temporary 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 - used as a temporary 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");
+}
+
+pub mod currency {
+	use polkadot_core_primitives::Balance;
+	use westend_runtime_constants as constants;
+
+	/// The existential deposit. Set to 1/10 of its parent Relay Chain.
+	pub const EXISTENTIAL_DEPOSIT: Balance = constants::currency::EXISTENTIAL_DEPOSIT / 10;
+
+	pub const UNITS: Balance = constants::currency::UNITS;
+	pub const DOLLARS: Balance = UNITS; // 1_000_000_000_000
+	pub const CENTS: Balance = constants::currency::CENTS;
+	pub const MILLICENTS: Balance = constants::currency::MILLICENTS;
+	pub const GRAND: Balance = constants::currency::GRAND;
+
+	pub const fn deposit(items: u32, bytes: u32) -> Balance {
+		// 1/100 of Westend testnet
+		constants::currency::deposit(items, bytes) / 100
+	}
+}
+
+/// Fee-related.
+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 updated 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 Westend, 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,
+			}]
+		}
+	}
+}
+
+/// 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;
+}