mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-07-20 06:55:42 +00:00
Shawn Tabrizi
55 lines
2.3 KiB
Rust
55 lines
2.3 KiB
Rust
// Copyright 2020 Parity Technologies (UK) Ltd.
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// This file is part of Polkadot.
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// Polkadot is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Polkadot is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Polkadot. If not, see <http://www.gnu.org/licenses/>.
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use sp_std::{result, convert::TryInto, marker::PhantomData};
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use xcm::v0::{Error, Result, MultiAsset, MultiLocation};
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use sp_arithmetic::traits::SaturatedConversion;
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use frame_support::traits::{ExistenceRequirement::AllowDeath, WithdrawReasons};
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use xcm_executor::traits::{MatchesFungible, LocationConversion, TransactAsset};
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pub struct CurrencyAdapter<Currency, Matcher, AccountIdConverter, AccountId>(
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PhantomData<Currency>,
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PhantomData<Matcher>,
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PhantomData<AccountIdConverter>,
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PhantomData<AccountId>,
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);
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impl<
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Matcher: MatchesFungible<Currency::Balance>,
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AccountIdConverter: LocationConversion<AccountId>,
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Currency: frame_support::traits::Currency<AccountId>,
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AccountId, // can't get away without it since Currency is generic over it.
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> TransactAsset for CurrencyAdapter<Currency, Matcher, AccountIdConverter, AccountId> {
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fn deposit_asset(what: &MultiAsset, who: &MultiLocation) -> Result {
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// Check we handle this asset.
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let amount: u128 = Matcher::matches_fungible(&what).ok_or(())?.saturated_into();
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let who = AccountIdConverter::from_location(who).ok_or(())?;
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let balance_amount = amount.try_into().map_err(|_| ())?;
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let _imbalance = Currency::deposit_creating(&who, balance_amount);
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Ok(())
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}
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fn withdraw_asset(what: &MultiAsset, who: &MultiLocation) -> result::Result<MultiAsset, Error> {
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// Check we handle this asset.
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let amount: u128 = Matcher::matches_fungible(&what).ok_or(())?.saturated_into();
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let who = AccountIdConverter::from_location(who).ok_or(())?;
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let balance_amount = amount.try_into().map_err(|_| ())?;
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Currency::withdraw(&who, balance_amount, WithdrawReasons::TRANSFER, AllowDeath).map_err(|_| ())?;
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Ok(what.clone())
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}
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}
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