mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
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Vivek Pandya
bc53b9a03a
* Change copyright year to 2023 from 2022 * Fix incorrect update of copyright year * Remove years from copy right header * Fix remaining files * Fix typo in a header and remove update-copyright.sh
40 lines
1.5 KiB
Rust
40 lines
1.5 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) Parity Technologies (UK) Ltd.
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// SPDX-License-Identifier: Apache-2.0
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//! Stores the externalities in an `environmental` value to make it scope limited available.
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use crate::Externalities;
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environmental::environmental!(ext: trait Externalities);
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/// Set the given externalities while executing the given closure. To get access to the
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/// externalities while executing the given closure [`with_externalities`] grants access to them.
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/// The externalities are only set for the same thread this function was called from.
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pub fn set_and_run_with_externalities<F, R>(ext: &mut dyn Externalities, f: F) -> R
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where
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F: FnOnce() -> R,
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{
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ext::using(ext, f)
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}
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/// Execute the given closure with the currently set externalities.
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///
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/// Returns `None` if no externalities are set or `Some(_)` with the result of the closure.
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pub fn with_externalities<F: FnOnce(&mut dyn Externalities) -> R, R>(f: F) -> Option<R> {
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ext::with(f)
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}
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