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// 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 <http://www.gnu.org/licenses/>.
use frame_support::storage::{with_transaction, TransactionOutcome};
use sp_runtime::DispatchError;
use xcm::latest::prelude::*;
use xcm_executor::traits::ProcessTransaction;
/// Transactional processor implementation using frame transactional layers.
pub struct FrameTransactionalProcessor;
impl ProcessTransaction for FrameTransactionalProcessor {
const IS_TRANSACTIONAL: bool = true;
fn process<F>(f: F) -> Result<(), XcmError>
where
F: FnOnce() -> Result<(), XcmError>,
{
with_transaction(|| -> TransactionOutcome<Result<_, DispatchError>> {
let output = f();
match &output {
Ok(()) => TransactionOutcome::Commit(Ok(output)),
_ => TransactionOutcome::Rollback(Ok(output)),
}
})
.map_err(|_| XcmError::ExceedsStackLimit)?
}
}