git.delta.rocks / unique-network / refs/commits / 3deec63c5467

1// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.2// This file is part of Unique Network.34// Unique Network is free software: you can redistribute it and/or modify5// it under the terms of the GNU General Public License as published by6// the Free Software Foundation, either version 3 of the License, or7// (at your option) any later version.89// Unique Network is distributed in the hope that it will be useful,10// but WITHOUT ANY WARRANTY; without even the implied warranty of11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the12// GNU General Public License for more details.1314// You should have received a copy of the GNU General Public License15// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.1617use frame_support::{18	traits::{tokens::currency::Currency as CurrencyT, OnUnbalanced as OnUnbalancedT, Get},19	weights::WeightToFeePolynomial,20};21use sp_runtime::traits::{CheckedConversion, Zero, Convert};22use xcm::v1::{Junction::*, MultiLocation, Junctions::*};23use xcm::latest::{24	AssetId::{Concrete},25	Fungibility::Fungible as XcmFungible,26	MultiAsset, Error as XcmError,27	Weight,28};29use xcm_builder::{CurrencyAdapter, NativeAsset};30use xcm_executor::{31	Assets,32	traits::{MatchesFungible, WeightTrader},33};34use pallet_foreign_assets::{AssetIds, NativeCurrency};35use sp_std::marker::PhantomData;36use crate::{Balances, ParachainInfo};37use super::{LocationToAccountId, RelayLocation};3839use up_common::types::{AccountId, Balance};4041pub struct OnlySelfCurrency;42impl<B: TryFrom<u128>> MatchesFungible<B> for OnlySelfCurrency {43	fn matches_fungible(a: &MultiAsset) -> Option<B> {44		let paraid = Parachain(ParachainInfo::parachain_id().into());45		match (&a.id, &a.fun) {46			(47				Concrete(MultiLocation {48					parents: 1,49					interior: X1(loc),50				}),51				XcmFungible(ref amount),52			) if paraid == *loc => CheckedConversion::checked_from(*amount),53			(54				Concrete(MultiLocation {55					parents: 0,56					interior: Here,57				}),58				XcmFungible(ref amount),59			) => CheckedConversion::checked_from(*amount),60			_ => None,61		}62	}63}6465/// Means for transacting assets on this chain.66pub type LocalAssetTransactor = CurrencyAdapter<67	// Use this currency:68	Balances,69	// Use this currency when it is a fungible asset matching the given location or name:70	OnlySelfCurrency,71	// Do a simple punn to convert an AccountId32 MultiLocation into a native chain account ID:72	LocationToAccountId,73	// Our chain's account ID type (we can't get away without mentioning it explicitly):74	AccountId,75	// We don't track any teleports.76	(),77>;7879pub type AssetTransactors = LocalAssetTransactor;8081pub type IsReserve = NativeAsset;8283pub struct UsingOnlySelfCurrencyComponents<84	WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,85	AssetId: Get<MultiLocation>,86	AccountId,87	Currency: CurrencyT<AccountId>,88	OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,89>(90	Weight,91	Currency::Balance,92	PhantomData<(WeightToFee, AssetId, AccountId, Currency, OnUnbalanced)>,93);94impl<95		WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,96		AssetId: Get<MultiLocation>,97		AccountId,98		Currency: CurrencyT<AccountId>,99		OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,100	> WeightTrader101	for UsingOnlySelfCurrencyComponents<WeightToFee, AssetId, AccountId, Currency, OnUnbalanced>102{103	fn new() -> Self {104		Self(0, Zero::zero(), PhantomData)105	}106107	fn buy_weight(&mut self, _weight: Weight, payment: Assets) -> Result<Assets, XcmError> {108		Ok(payment)109	}110}111impl<112		WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,113		AssetId: Get<MultiLocation>,114		AccountId,115		Currency: CurrencyT<AccountId>,116		OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,117	> Drop118	for UsingOnlySelfCurrencyComponents<WeightToFee, AssetId, AccountId, Currency, OnUnbalanced>119{120	fn drop(&mut self) {121		OnUnbalanced::on_unbalanced(Currency::issue(self.1));122	}123}124125pub type Trader<T> = UsingOnlySelfCurrencyComponents<126	pallet_configuration::WeightToFee<T, Balance>,127	RelayLocation,128	AccountId,129	Balances,130	(),131>;132133pub struct CurrencyIdConvert;134impl Convert<AssetIds, Option<MultiLocation>> for CurrencyIdConvert {135	fn convert(id: AssetIds) -> Option<MultiLocation> {136		match id {137			AssetIds::NativeAssetId(NativeCurrency::Here) => Some(MultiLocation::new(138				1,139				X1(Parachain(ParachainInfo::get().into())),140			)),141			_ => None,142		}143	}144}