59 lines
1.8 KiB
Rust
59 lines
1.8 KiB
Rust
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// Copyright 2015-2018 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity 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 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. If not, see <http://www.gnu.org/licenses/>.
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/// Transaction readiness.
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#[derive(Debug, Clone, Copy, PartialEq, Eq)]
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pub enum Readiness {
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/// The transaction is stale (and should/will be removed from the pool).
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Stale,
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/// The transaction is ready to be included in pending set.
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Ready,
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/// The transaction is not yet ready.
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Future,
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}
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/// A readiness indicator.
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pub trait Ready<T> {
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/// Returns true if transaction is ready to be included in pending block,
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/// given all previous transactions that were ready are already included.
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///
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/// NOTE: readiness of transactions will be checked according to `Score` ordering,
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/// the implementation should maintain a state of already checked transactions.
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fn is_ready(&mut self, tx: &T) -> Readiness;
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}
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impl<T, F> Ready<T> for F
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where
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F: FnMut(&T) -> Readiness,
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{
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fn is_ready(&mut self, tx: &T) -> Readiness {
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(*self)(tx)
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}
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}
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impl<T, A, B> Ready<T> for (A, B)
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where
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A: Ready<T>,
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B: Ready<T>,
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{
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fn is_ready(&mut self, tx: &T) -> Readiness {
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match self.0.is_ready(tx) {
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Readiness::Ready => self.1.is_ready(tx),
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r => r,
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}
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}
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}
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