// Copyright 2021 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 .
//! XCM sender for relay chain.
use parity_scale_codec::Encode;
use runtime_parachains::{configuration, dmp};
use sp_std::marker::PhantomData;
use xcm::latest::prelude::*;
/// XCM sender for relay chain. It only sends downward message.
pub struct ChildParachainRouter(PhantomData<(T, W)>);
impl SendXcm
for ChildParachainRouter
{
fn send_xcm(dest: impl Into, msg: Xcm<()>) -> SendResult {
let dest = dest.into();
match dest {
MultiLocation { parents: 0, interior: X1(Parachain(id)) } => {
// Downward message passing.
let versioned_xcm =
W::wrap_version(&dest, msg).map_err(|()| SendError::DestinationUnsupported)?;
let config = >::config();
>::queue_downward_message(
&config,
id.into(),
versioned_xcm.encode(),
)
.map_err(Into::::into)?;
Ok(())
},
dest => Err(SendError::CannotReachDestination(dest, msg)),
}
}
}