staging_xcm_builder/
transactional.rs

1// Copyright 2021 Parity Technologies (UK) Ltd.
2// This file is part of Polkadot.
3
4// Polkadot is free software: you can redistribute it and/or modify
5// it under the terms of the GNU General Public License as published by
6// the Free Software Foundation, either version 3 of the License, or
7// (at your option) any later version.
8
9// Polkadot is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12// GNU General Public License for more details.
13
14// You should have received a copy of the GNU General Public License
15// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
16
17use frame_support::storage::{with_transaction, TransactionOutcome};
18use sp_runtime::DispatchError;
19use xcm::latest::prelude::*;
20use xcm_executor::traits::ProcessTransaction;
21
22/// Transactional processor implementation using frame transactional layers.
23pub struct FrameTransactionalProcessor;
24impl ProcessTransaction for FrameTransactionalProcessor {
25	const IS_TRANSACTIONAL: bool = true;
26
27	fn process<F>(f: F) -> Result<(), XcmError>
28	where
29		F: FnOnce() -> Result<(), XcmError>,
30	{
31		with_transaction(|| -> TransactionOutcome<Result<_, DispatchError>> {
32			let output = f();
33			match &output {
34				Ok(()) => TransactionOutcome::Commit(Ok(output)),
35				_ => TransactionOutcome::Rollback(Ok(output)),
36			}
37		})
38		.map_err(|error| {
39			tracing::debug!(target: "xcm::transactional", ?error, "Failed to process XCM transaction");
40			XcmError::ExceedsStackLimit
41		})?
42	}
43}
staging_xcm_builder/transactional.rs

staging_xcm_builder/
transactional.rs
