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// Copyright (C) Parity Technologies (UK) Ltd.
// This file is part of Polkadot.
// Polkadot is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Polkadot is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Polkadot. If not, see <http://www.gnu.org/licenses/>.
//! Implementation for `ContainsPair<MultiLocation, MultiLocation>`.
use frame_support::traits::{Contains, ContainsPair};
use sp_std::marker::PhantomData;
use xcm::latest::prelude::*;
/// Alias a Foreign `AccountId32` with a local `AccountId32` if the foreign `AccountId32` matches
/// the `Prefix` pattern.
///
/// Requires that the prefixed origin `AccountId32` matches the target `AccountId32`.
pub struct AliasForeignAccountId32<Prefix>(PhantomData<Prefix>);
impl<Prefix: Contains<MultiLocation>> ContainsPair<MultiLocation, MultiLocation>
for AliasForeignAccountId32<Prefix>
{
fn contains(origin: &MultiLocation, target: &MultiLocation) -> bool {
if let (prefix, Some(account_id @ AccountId32 { .. })) = origin.split_last_interior() {
return Prefix::contains(&prefix) &&
*target == MultiLocation { parents: 0, interior: X1(account_id) }
}
false
}
}