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fewensa
72 lines
2.6 KiB
Rust
72 lines
2.6 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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//! One-way message lane types. Within single one-way lane we have three 'races' where we try to:
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//!
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//! 1) relay new messages from source to target node;
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//! 2) relay proof-of-delivery from target to source node.
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use num_traits::{SaturatingAdd, Zero};
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use relay_utils::{BlockNumberBase, HeaderId};
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use sp_arithmetic::traits::AtLeast32BitUnsigned;
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use std::{fmt::Debug, ops::Sub};
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/// One-way message lane.
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pub trait MessageLane: 'static + Clone + Send + Sync {
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/// Name of the messages source.
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const SOURCE_NAME: &'static str;
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/// Name of the messages target.
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const TARGET_NAME: &'static str;
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/// Messages proof.
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type MessagesProof: Clone + Debug + Send + Sync;
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/// Messages receiving proof.
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type MessagesReceivingProof: Clone + Debug + Send + Sync;
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/// The type of the source chain token balance, that is used to:
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///
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/// 1) pay transaction fees;
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/// 2) pay message delivery and dispatch fee;
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/// 3) pay relayer rewards.
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type SourceChainBalance: AtLeast32BitUnsigned
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+ Clone
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+ Copy
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+ Debug
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+ PartialOrd
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+ Sub<Output = Self::SourceChainBalance>
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+ SaturatingAdd
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+ Zero
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+ Send
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+ Sync;
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/// Number of the source header.
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type SourceHeaderNumber: BlockNumberBase;
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/// Hash of the source header.
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type SourceHeaderHash: Clone + Debug + Default + PartialEq + Send + Sync;
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/// Number of the target header.
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type TargetHeaderNumber: BlockNumberBase;
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/// Hash of the target header.
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type TargetHeaderHash: Clone + Debug + Default + PartialEq + Send + Sync;
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}
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/// Source header id within given one-way message lane.
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pub type SourceHeaderIdOf<P> =
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HeaderId<<P as MessageLane>::SourceHeaderHash, <P as MessageLane>::SourceHeaderNumber>;
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/// Target header id within given one-way message lane.
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pub type TargetHeaderIdOf<P> =
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HeaderId<<P as MessageLane>::TargetHeaderHash, <P as MessageLane>::TargetHeaderNumber>;
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