git.delta.rocks / unique-network / refs/commits / fa01f9a87ad6

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, Weight,27};28use xcm_builder::{CurrencyAdapter, NativeAsset};29use xcm_executor::{30	Assets,31	traits::{MatchesFungible, WeightTrader},32};33use pallet_foreign_assets::{AssetIds, NativeCurrency};34use sp_std::marker::PhantomData;35use crate::{Balances, ParachainInfo};36use super::{LocationToAccountId, RelayLocation};3738use up_common::types::{AccountId, Balance};3940pub struct OnlySelfCurrency;41impl<B: TryFrom<u128>> MatchesFungible<B> for OnlySelfCurrency {42	fn matches_fungible(a: &MultiAsset) -> Option<B> {43		let paraid = Parachain(ParachainInfo::parachain_id().into());44		match (&a.id, &a.fun) {45			(46				Concrete(MultiLocation {47					parents: 1,48					interior: X1(loc),49				}),50				XcmFungible(ref amount),51			) if paraid == *loc => CheckedConversion::checked_from(*amount),52			(53				Concrete(MultiLocation {54					parents: 0,55					interior: Here,56				}),57				XcmFungible(ref amount),58			) => CheckedConversion::checked_from(*amount),59			_ => None,60		}61	}62}6364/// Means for transacting assets on this chain.65pub type LocalAssetTransactor = CurrencyAdapter<66	// Use this currency:67	Balances,68	// Use this currency when it is a fungible asset matching the given location or name:69	OnlySelfCurrency,70	// Do a simple punn to convert an AccountId32 MultiLocation into a native chain account ID:71	LocationToAccountId,72	// Our chain's account ID type (we can't get away without mentioning it explicitly):73	AccountId,74	// We don't track any teleports.75	(),76>;7778pub type AssetTransactors = LocalAssetTransactor;7980pub type IsReserve = NativeAsset;8182pub struct UsingOnlySelfCurrencyComponents<83	WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,84	AssetId: Get<MultiLocation>,85	AccountId,86	Currency: CurrencyT<AccountId>,87	OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,88>(89	Weight,90	Currency::Balance,91	PhantomData<(WeightToFee, AssetId, AccountId, Currency, OnUnbalanced)>,92);93impl<94		WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,95		AssetId: Get<MultiLocation>,96		AccountId,97		Currency: CurrencyT<AccountId>,98		OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,99	> WeightTrader100	for UsingOnlySelfCurrencyComponents<WeightToFee, AssetId, AccountId, Currency, OnUnbalanced>101{102	fn new() -> Self {103		Self(0, Zero::zero(), PhantomData)104	}105106	fn buy_weight(&mut self, _weight: Weight, payment: Assets) -> Result<Assets, XcmError> {107		Ok(payment)108	}109}110impl<111		WeightToFee: WeightToFeePolynomial<Balance = Currency::Balance>,112		AssetId: Get<MultiLocation>,113		AccountId,114		Currency: CurrencyT<AccountId>,115		OnUnbalanced: OnUnbalancedT<Currency::NegativeImbalance>,116	> Drop117	for UsingOnlySelfCurrencyComponents<WeightToFee, AssetId, AccountId, Currency, OnUnbalanced>118{119	fn drop(&mut self) {120		OnUnbalanced::on_unbalanced(Currency::issue(self.1));121	}122}123124pub type Trader<T> = UsingOnlySelfCurrencyComponents<125	pallet_configuration::WeightToFee<T, Balance>,126	RelayLocation,127	AccountId,128	Balances,129	(),130>;131132pub struct CurrencyIdConvert;133impl Convert<AssetIds, Option<MultiLocation>> for CurrencyIdConvert {134	fn convert(id: AssetIds) -> Option<MultiLocation> {135		match id {136			AssetIds::NativeAssetId(NativeCurrency::Here) => Some(MultiLocation::new(137				1,138				X1(Parachain(ParachainInfo::get().into())),139			)),140			_ => None,141		}142	}143}