Repository: paritytech/substrate
File: frame/transaction-payment/asset-conversion-tx-payment/src/mock.rs (Rust)

Code before:
	type MintMinLiquidity = ConstU64<100>; // 100 is good enough when the main currency has 12 decimals.

	type Balance = u64;
	type HigherPrecisionBalance = u128;

	type MultiAssetId = NativeOrAssetId<u32>;
	type MultiAssetIdConverter = NativeOrAssetIdConverter<u32>;

	pallet_asset_conversion::runtime_benchmarks_enabled! {
		type BenchmarkHelper = ();
	}
}

impl Config for Runtime {
	type RuntimeEvent = RuntimeEvent;
	type Fungibles = Assets;
	type OnChargeAssetTransaction = AssetConversionAdapter<Balances, AssetConversion>;
}

/// An implementation of MultiAssetId that can be either Native or an asset.
#[derive(Decode, Encode, Default, MaxEncodedLen, TypeInfo, Clone, Copy, Debug)]
pub enum NativeOrAssetId<AssetId>
where
	AssetId: Ord,
{
	/// Native asset. For example, on AssetHubPolkadot this would be dot.
	#[default]
	Native,
	/// A non-native asset id.
	Asset(AssetId),
}

impl<AssetId: Ord> From<AssetId> for NativeOrAssetId<AssetId> {
	fn from(asset: AssetId) -> Self {
		Self::Asset(asset)
	}
}

impl<AssetId: Ord> Ord for NativeOrAssetId<AssetId> {
	fn cmp(&self, other: &Self) -> Ordering {
		match (self, other) {
			(Self::Native, Self::Native) => Ordering::Equal,
			(Self::Native, Self::Asset(_)) => Ordering::Less,
			(Self::Asset(_), Self::Native) => Ordering::Greater,
			(Self::Asset(id1), Self::Asset(id2)) => <AssetId as Ord>::cmp(id1, id2),
		}
	}
}
impl<AssetId: Ord> PartialOrd for NativeOrAssetId<AssetId> {
	fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
		Some(<Self as Ord>::cmp(self, other))

Review comment (suggestion):
```suggestion
	/// Native asset. For example, on the Polkadot Asset Hub this would be DOT.
```

Code after:
// 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.

use super::*;
use crate as pallet_asset_conversion_tx_payment;

use codec;
use frame_support::{
	dispatch::DispatchClass,
	instances::Instance2,
	ord_parameter_types,
	pallet_prelude::*,
	parameter_types,
	traits::{AsEnsureOriginWithArg, ConstU32, ConstU64, ConstU8, Imbalance, OnUnbalanced},
	weights::{Weight, WeightToFee as WeightToFeeT},
	PalletId,
};
use frame_system as system;
use frame_system::{EnsureRoot, EnsureSignedBy};
use pallet_asset_conversion::{NativeOrAssetId, NativeOrAssetIdConverter};
use pallet_transaction_payment::CurrencyAdapter;
use sp_core::H256;
use sp_runtime::{
	traits::{AccountIdConversion, BlakeTwo256, IdentityLookup, SaturatedConversion},
	Permill,
};

type Block = frame_system::mocking::MockBlock<Runtime>;
type Balance = u64;
type AccountId = u64;

frame_support::construct_runtime!(
	pub enum Runtime
	{
		System: system,
		Balances: pallet_balances,
		TransactionPayment: pallet_transaction_payment,
		Assets: pallet_assets,
		PoolAssets: pallet_assets::<Instance2>,
		AssetConversion: pallet_asset_conversion,
		AssetTxPayment: pallet_asset_conversion_tx_payment,
	}
);

parameter_types! {
	pub(crate) static ExtrinsicBaseWeight: Weight = Weight::zero();
}

pub struct BlockWeights;
impl Get<frame_system::limits::BlockWeights> for BlockWeights {
	fn get() -> frame_system::limits::BlockWeights {
		frame_system::limits::BlockWeights::builder()
			.base_block(Weight::zero())
			.for_class(DispatchClass::all(), |weights| {
				weights.base_extrinsic = ExtrinsicBaseWeight::get().into();
			})
			.for_class(DispatchClass::non_mandatory(), |weights| {
				weights.max_total = Weight::from_parts(1024, u64::MAX).into();
			})
			.build_or_panic()
	}
}

parameter_types! {
	pub static WeightToFee: u64 = 1;
	pub static TransactionByteFee: u64 = 1;
}

impl frame_system::Config for Runtime {
	type BaseCallFilter = frame_support::traits::Everything;
	type BlockWeights = BlockWeights;
	type BlockLength = ();
	type DbWeight = ();
	type RuntimeOrigin = RuntimeOrigin;
	type Nonce = u64;
	type RuntimeCall = RuntimeCall;
	type Hash = H256;
	type Hashing = BlakeTwo256;
	type AccountId = AccountId;
	type Lookup = IdentityLookup<Self::AccountId>;
	type Block = Block;
	type RuntimeEvent = RuntimeEvent;
	type BlockHashCount = ConstU64<250>;
	type Version = ();
	type PalletInfo = PalletInfo;
	type AccountData = pallet_balances::AccountData<u64>;
	type OnNewAccount = ();
	type OnKilledAccount = ();
	type SystemWeightInfo = ();
	type SS58Prefix = ();
	type OnSetCode = ();
	type MaxConsumers = ConstU32<16>;
}

parameter_types! {
	pub const ExistentialDeposit: u64 = 10;
}

impl pallet_balances::Config for Runtime {
	type Balance = Balance;
	type RuntimeEvent = RuntimeEvent;
	type DustRemoval = ();
	type ExistentialDeposit = ConstU64<10>;
	type AccountStore = System;
	type MaxLocks = ();
	type WeightInfo = ();
	type MaxReserves = ConstU32<50>;
	type ReserveIdentifier = [u8; 8];
	type FreezeIdentifier = ();
	type MaxFreezes = ();
	type RuntimeHoldReason = ();
	type MaxHolds = ();
}

impl WeightToFeeT for WeightToFee {
	type Balance = u64;

	fn weight_to_fee(weight: &Weight) -> Self::Balance {
		Self::Balance::saturated_from(weight.ref_time())
			.saturating_mul(WEIGHT_TO_FEE.with(|v| *v.borrow()))
	}
}

impl WeightToFeeT for TransactionByteFee {
	type Balance = u64;

	fn weight_to_fee(weight: &Weight) -> Self::Balance {
		Self::Balance::saturated_from(weight.ref_time())
			.saturating_mul(TRANSACTION_BYTE_FEE.with(|v| *v.borrow()))
	}
}

parameter_types! {
	pub(crate) static TipUnbalancedAmount: u64 = 0;
	pub(crate) static FeeUnbalancedAmount: u64 = 0;
}

pub struct DealWithFees;
impl OnUnbalanced<pallet_balances::NegativeImbalance<Runtime>> for DealWithFees {
	fn on_unbalanceds<B>(
		mut fees_then_tips: impl Iterator<Item = pallet_balances::NegativeImbalance<Runtime>>,
	) {
		if let Some(fees) = fees_then_tips.next() {
			FeeUnbalancedAmount::mutate(|a| *a += fees.peek());
			if let Some(tips) = fees_then_tips.next() {
				TipUnbalancedAmount::mutate(|a| *a += tips.peek());
			}
		}
	}
}

impl pallet_transaction_payment::Config for Runtime {
	type RuntimeEvent = RuntimeEvent;
	type OnChargeTransaction = CurrencyAdapter<Balances, DealWithFees>;
	type WeightToFee = WeightToFee;
	type LengthToFee = TransactionByteFee;
	type FeeMultiplierUpdate = ();
	type OperationalFeeMultiplier = ConstU8<5>;
}

type AssetId = u32;

impl pallet_assets::Config for Runtime {
	type RuntimeEvent = RuntimeEvent;
	type Balance = Balance;
	type AssetId = AssetId;
	type AssetIdParameter = codec::Compact<AssetId>;
	type Currency = Balances;
	type CreateOrigin = AsEnsureOriginWithArg<frame_system::EnsureSigned<AccountId>>;
	type ForceOrigin = EnsureRoot<AccountId>;
	type AssetDeposit = ConstU64<2>;
	type AssetAccountDeposit = ConstU64<2>;
	type MetadataDepositBase = ConstU64<0>;
	type MetadataDepositPerByte = ConstU64<0>;
	type ApprovalDeposit = ConstU64<0>;
	type StringLimit = ConstU32<20>;
	type Freezer = ();
	type Extra = ();
	type CallbackHandle = ();
	type WeightInfo = ();
	type RemoveItemsLimit = ConstU32<1000>;
	pallet_assets::runtime_benchmarks_enabled! {
		type BenchmarkHelper = ();
	}
}

impl pallet_assets::Config<Instance2> for Runtime {
	type RuntimeEvent = RuntimeEvent;
	type Balance = u64;
	type RemoveItemsLimit = ConstU32<1000>;
	type AssetId = u32;
	type AssetIdParameter = u32;
	type Currency = Balances;
	type CreateOrigin = AsEnsureOriginWithArg<EnsureSignedBy<AssetConversionOrigin, u64>>;
	type ForceOrigin = frame_system::EnsureRoot<u64>;
	type AssetDeposit = ConstU64<0>;
	type AssetAccountDeposit = ConstU64<0>;
	type MetadataDepositBase = ConstU64<0>;
	type MetadataDepositPerByte = ConstU64<0>;
	type ApprovalDeposit = ConstU64<0>;
	type StringLimit = ConstU32<50>;
	type Freezer = ();
	type Extra = ();
	type WeightInfo = ();
	type CallbackHandle = ();
	pallet_assets::runtime_benchmarks_enabled! {
		type BenchmarkHelper = ();
	}
}

parameter_types! {
	pub const AssetConversionPalletId: PalletId = PalletId(*b"py/ascon");
	pub storage AllowMultiAssetPools: bool = false;
	// should be non-zero if AllowMultiAssetPools is true, otherwise can be zero
	pub storage LiquidityWithdrawalFee: Permill = Permill::from_percent(0);
	pub const MaxSwapPathLength: u32 = 4;
}

ord_parameter_types! {
	pub const AssetConversionOrigin: u64 = AccountIdConversion::<u64>::into_account_truncating(&AssetConversionPalletId::get());
}

impl pallet_asset_conversion::Config for Runtime {
	type RuntimeEvent = RuntimeEvent;
	type Currency = Balances;
	type AssetBalance = <Self as pallet_balances::Config>::Balance;
	type AssetId = u32;
	type PoolAssetId = u32;
	type Assets = Assets;
	type PoolAssets = PoolAssets;
	type PalletId = AssetConversionPalletId;
	type WeightInfo = ();
	type LPFee = ConstU32<3>; // means 0.3%
	type PoolSetupFee = ConstU64<100>; // should be more or equal to the existential deposit
	type PoolSetupFeeReceiver = AssetConversionOrigin;
	type LiquidityWithdrawalFee = LiquidityWithdrawalFee;
	type AllowMultiAssetPools = AllowMultiAssetPools;
	type MaxSwapPathLength = MaxSwapPathLength;
	type MintMinLiquidity = ConstU64<100>; // 100 is good enough when the main currency has 12 decimals.

	type Balance = u64;
	type HigherPrecisionBalance = u128;

	type MultiAssetId = NativeOrAssetId<u32>;
	type MultiAssetIdConverter = NativeOrAssetIdConverter<u32>;

	pallet_asset_conversion::runtime_benchmarks_enabled! {
		type BenchmarkHelper = ();
	}
}

impl Config for Runtime {
	type RuntimeEvent = RuntimeEvent;
	type Fungibles = Assets;
	type OnChargeAssetTransaction = AssetConversionAdapter<Balances, AssetConversion>;
}