mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
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Svyatoslav Nikolsky
36 lines
1.5 KiB
Rust
36 lines
1.5 KiB
Rust
// Copyright 2019-2021 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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//! Types and functions intended to ease adding of new Substrate -> Substrate
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//! on-demand pipelines.
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use async_trait::async_trait;
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pub mod headers;
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pub mod parachains;
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/// On-demand headers relay that is relaying finalizing headers only when requested.
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#[async_trait]
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pub trait OnDemandRelay<SourceHeaderNumber>: Send + Sync {
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/// Ask relay to relay source header with given number to the target chain.
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///
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/// Depending on implementation, on-demand relay may also relay `required_header` ancestors
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/// (e.g. if they're mandatory), or its descendants. The request is considered complete if
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/// the best avbailable header at the target chain has number that is larger than or equal
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/// to the `required_header`.
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async fn require_more_headers(&self, required_header: SourceHeaderNumber);
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}
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