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// Copyright 2020 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/>.
#![cfg_attr(not(feature = "std"), no_std)]
mod location_conversion;
pub use location_conversion::{
Account32Hash, ParentIsDefault, ChildParachainConvertsVia, SiblingParachainConvertsVia, AccountId32Aliases
};
mod origin_conversion;
pub use origin_conversion::{
SovereignSignedViaLocation, ParentAsSuperuser, ChildSystemParachainAsSuperuser, SiblingSystemParachainAsSuperuser,
ChildParachainAsNative, SiblingParachainAsNative, RelayChainAsNative, SignedAccountId32AsNative
};
mod currency_adapter;
pub use currency_adapter::CurrencyAdapter;
use sp_std::marker::PhantomData;
use xcm_executor::traits::InvertLocation;
use xcm::v0::{MultiLocation, Junction};
use frame_support::traits::Get;
/// Simple location inverter; give it this location's ancestry and it'll
pub struct LocationInverter<Ancestry>(PhantomData<Ancestry>);
impl<Ancestry: Get<MultiLocation>> InvertLocation for LocationInverter<Ancestry> {
fn invert_location(location: &MultiLocation) -> MultiLocation {
let mut ancestry = Ancestry::get();
let mut result = location.clone();
for (i, j) in location.iter_rev()
.map(|j| match j {
Junction::Parent => ancestry.take_first().unwrap_or(Junction::OnlyChild),
_ => Junction::Parent,
})
.enumerate()
{
*result.at_mut(i).expect("location and result begin equal; same size; qed") = j;
}
result
}
}