55 lines
1.7 KiB
Rust
55 lines
1.7 KiB
Rust
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
|
|
// This file is part of Parity.
|
|
|
|
// Parity is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
|
|
// Parity is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
/// Transaction readiness.
|
|
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
|
|
pub enum Readiness {
|
|
/// The transaction is stale (and should/will be removed from the pool).
|
|
Stale,
|
|
/// The transaction is ready to be included in pending set.
|
|
Ready,
|
|
/// The transaction is not yet ready.
|
|
Future,
|
|
}
|
|
|
|
/// A readiness indicator.
|
|
pub trait Ready<T> {
|
|
/// Returns true if transaction is ready to be included in pending block,
|
|
/// given all previous transactions that were ready are already included.
|
|
///
|
|
/// NOTE: readiness of transactions will be checked according to `Score` ordering,
|
|
/// the implementation should maintain a state of already checked transactions.
|
|
fn is_ready(&mut self, tx: &T) -> Readiness;
|
|
}
|
|
|
|
impl<T, F> Ready<T> for F where F: FnMut(&T) -> Readiness {
|
|
fn is_ready(&mut self, tx: &T) -> Readiness {
|
|
(*self)(tx)
|
|
}
|
|
}
|
|
|
|
impl<T, A, B> Ready<T> for (A, B) where
|
|
A: Ready<T>,
|
|
B: Ready<T>,
|
|
{
|
|
fn is_ready(&mut self, tx: &T) -> Readiness {
|
|
match self.0.is_ready(tx) {
|
|
Readiness::Ready => self.1.is_ready(tx),
|
|
r => r,
|
|
}
|
|
}
|
|
}
|