openethereum/rpc/src/v1/helpers/signing_queue.rs

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// Copyright 2015, 2016 Ethcore (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/>.
use std::sync::Mutex;
use std::collections::HashMap;
use v1::types::{TransactionRequest, TransactionConfirmation};
use util::U256;
/// A queue of transactions awaiting to be confirmed and signed.
pub trait SigningQueue: Send + Sync {
/// Add new request to the queue.
fn add_request(&self, transaction: TransactionRequest) -> U256;
/// Remove request from the queue.
fn remove_request(&self, id: U256) -> Option<TransactionConfirmation>;
/// Return copy of all the requests in the queue.
fn requests(&self) -> Vec<TransactionConfirmation>;
}
/// Queue for all unconfirmed transactions.
pub struct ConfirmationsQueue {
id: Mutex<U256>,
queue: Mutex<HashMap<U256, TransactionConfirmation>>,
}
impl Default for ConfirmationsQueue {
fn default() -> Self {
ConfirmationsQueue {
id: Mutex::new(U256::from(0)),
queue: Mutex::new(HashMap::new()),
}
}
}
impl SigningQueue for ConfirmationsQueue {
fn add_request(&self, transaction: TransactionRequest) -> U256 {
// Increment id
let id = {
let mut last_id = self.id.lock().unwrap();
*last_id = *last_id + U256::from(1);
*last_id
};
let mut queue = self.queue.lock().unwrap();
queue.insert(id, TransactionConfirmation {
id: id,
transaction: transaction,
});
id
}
fn remove_request(&self, id: U256) -> Option<TransactionConfirmation> {
self.queue.lock().unwrap().remove(&id)
}
fn requests(&self) -> Vec<TransactionConfirmation> {
let queue = self.queue.lock().unwrap();
queue.values().cloned().collect()
}
}
#[cfg(test)]
mod test {
use util::hash::Address;
use util::numbers::U256;
use v1::types::TransactionRequest;
use super::*;
#[test]
fn should_work_for_hashset() {
// given
let queue = ConfirmationsQueue::default();
let request = TransactionRequest {
from: Address::from(1),
to: Some(Address::from(2)),
gas_price: None,
gas: None,
value: Some(U256::from(10_000_000)),
data: None,
nonce: None,
};
// when
queue.add_request(request.clone());
let all = queue.requests();
// then
assert_eq!(all.len(), 1);
let el = all.get(0).unwrap();
assert_eq!(el.id, U256::from(1));
assert_eq!(el.transaction, request);
}
}