mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-07-12 08:45:42 +00:00
Tomasz Drwięga
5169155f94
* Add instructions. * Squashed 'bridges/' content from commit 345e84a21 git-subtree-dir: bridges git-subtree-split: 345e84a2146b56628e9888c9f5e129cb40e868a9 * Remove bridges workspace file to avoid confusing Cargo. * Add some bridges primitives to Polkadot workspace. * Improve docs.
62 lines
1.9 KiB
Rust
62 lines
1.9 KiB
Rust
// Copyright 2019-2020 Parity Technologies (UK) Ltd.
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// This file is part of Parity Bridges Common.
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// Parity Bridges Common is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity Bridges Common is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity Bridges Common. If not, see <http://www.gnu.org/licenses/>.
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use headers_relay::sync_types::SourceHeader;
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use num_traits::{CheckedSub, One};
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use relay_utils::HeaderId;
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use sp_runtime::traits::Header as HeaderT;
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/// Generic wrapper for `sp_runtime::traits::Header` based headers, that
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/// implements `headers_relay::sync_types::SourceHeader` and may be used in headers sync directly.
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#[derive(Clone, Debug, PartialEq)]
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pub struct SyncHeader<Header>(Header);
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impl<Header> SyncHeader<Header> {
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/// Extracts wrapped header from self.
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pub fn into_inner(self) -> Header {
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self.0
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}
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}
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impl<Header> std::ops::Deref for SyncHeader<Header> {
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type Target = Header;
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fn deref(&self) -> &Self::Target {
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&self.0
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}
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}
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impl<Header> From<Header> for SyncHeader<Header> {
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fn from(header: Header) -> Self {
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Self(header)
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}
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}
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impl<Header: HeaderT> SourceHeader<Header::Hash, Header::Number> for SyncHeader<Header> {
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fn id(&self) -> HeaderId<Header::Hash, Header::Number> {
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relay_utils::HeaderId(*self.number(), self.hash())
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}
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fn parent_id(&self) -> HeaderId<Header::Hash, Header::Number> {
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relay_utils::HeaderId(
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self.number()
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.checked_sub(&One::one())
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.expect("should never be called for genesis header"),
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*self.parent_hash(),
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)
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}
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}
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