342 lines
10 KiB
Rust
342 lines
10 KiB
Rust
// Copyright 2015-2020 Parity Technologies (UK) Ltd.
|
|
// This file is part of OpenEthereum.
|
|
|
|
// OpenEthereum 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.
|
|
|
|
// OpenEthereum 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 OpenEthereum. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
use std::collections::BTreeMap;
|
|
|
|
use super::oneshot;
|
|
use ethereum_types::U256;
|
|
use parking_lot::{Mutex, RwLock};
|
|
use v1::{
|
|
helpers::{
|
|
errors,
|
|
requests::{ConfirmationPayload, ConfirmationRequest},
|
|
},
|
|
types::{ConfirmationResponse, Origin},
|
|
};
|
|
|
|
use jsonrpc_core::Error;
|
|
|
|
/// Result that can be returned from JSON RPC.
|
|
pub type ConfirmationResult = Result<ConfirmationResponse, Error>;
|
|
|
|
/// Possible events happening in the queue that can be listened to.
|
|
#[derive(Debug, PartialEq, Clone)]
|
|
pub enum QueueEvent {
|
|
/// Receiver should stop work upon receiving `Finish` message.
|
|
Finish,
|
|
/// Informs about new request.
|
|
NewRequest(U256),
|
|
/// Request rejected.
|
|
RequestRejected(U256),
|
|
/// Request resolved.
|
|
RequestConfirmed(U256),
|
|
}
|
|
|
|
/// Defines possible errors when inserting to queue
|
|
#[derive(Debug, PartialEq)]
|
|
pub enum QueueAddError {
|
|
LimitReached,
|
|
}
|
|
|
|
// TODO [todr] to consider: timeout instead of limit?
|
|
pub const QUEUE_LIMIT: usize = 50;
|
|
|
|
/// A queue of transactions awaiting to be confirmed and signed.
|
|
pub trait SigningQueue: Send + Sync {
|
|
/// Add new request to the queue.
|
|
/// Returns a `Result` wrapping `ConfirmationReceiver` together with it's unique id in the queue.
|
|
/// `ConfirmationReceiver` is a `Future` awaiting for resolution of the given request.
|
|
fn add_request(
|
|
&self,
|
|
request: ConfirmationPayload,
|
|
origin: Origin,
|
|
) -> Result<(U256, ConfirmationReceiver), QueueAddError>;
|
|
|
|
/// Notifies possible token holders that request was rejected.
|
|
fn request_rejected(&self, sender: ConfirmationSender) -> Option<ConfirmationRequest>;
|
|
|
|
/// Notifies possible token holders that request was confirmed and given hash was assigned.
|
|
fn request_confirmed(
|
|
&self,
|
|
sender: ConfirmationSender,
|
|
result: ConfirmationResult,
|
|
) -> Option<ConfirmationRequest>;
|
|
|
|
/// Put a request taken from `SigningQueue::take` back to the queue.
|
|
fn request_untouched(&self, sender: ConfirmationSender);
|
|
|
|
/// Returns and removes a request if it is contained in the queue.
|
|
fn take(&self, id: &U256) -> Option<ConfirmationSender>;
|
|
|
|
/// Return copy of all the requests in the queue.
|
|
fn requests(&self) -> Vec<ConfirmationRequest>;
|
|
|
|
/// Returns number of requests awaiting confirmation.
|
|
fn len(&self) -> usize;
|
|
|
|
/// Returns true if there are no requests awaiting confirmation.
|
|
fn is_empty(&self) -> bool;
|
|
}
|
|
|
|
/// Confirmation request information with result notifier.
|
|
pub struct ConfirmationSender {
|
|
/// Confirmation request information.
|
|
pub request: ConfirmationRequest,
|
|
|
|
sender: oneshot::Sender<ConfirmationResult>,
|
|
}
|
|
|
|
/// Receiving end of the Confirmation channel; can be used as a `Future` to await for `ConfirmationRequest`
|
|
/// being processed and turned into `ConfirmationOutcome`
|
|
pub type ConfirmationReceiver = oneshot::Receiver<ConfirmationResult>;
|
|
|
|
/// Queue for all unconfirmed requests.
|
|
#[derive(Default)]
|
|
pub struct ConfirmationsQueue {
|
|
id: Mutex<U256>,
|
|
queue: RwLock<BTreeMap<U256, ConfirmationSender>>,
|
|
on_event: RwLock<Vec<Box<dyn Fn(QueueEvent) -> () + Send + Sync>>>,
|
|
}
|
|
|
|
impl ConfirmationsQueue {
|
|
/// Adds a queue listener. For each event, `listener` callback will be invoked.
|
|
pub fn on_event<F: Fn(QueueEvent) -> () + Send + Sync + 'static>(&self, listener: F) {
|
|
self.on_event.write().push(Box::new(listener));
|
|
}
|
|
|
|
/// Notifies consumer that the communcation is over.
|
|
/// No more events will be sent after this function is invoked.
|
|
pub fn finish(&self) {
|
|
self.notify_message(QueueEvent::Finish);
|
|
self.on_event.write().clear();
|
|
}
|
|
|
|
/// Notifies `ConfirmationReceiver` holder about the result given a request.
|
|
fn notify_result(
|
|
&self,
|
|
sender: ConfirmationSender,
|
|
result: Option<ConfirmationResult>,
|
|
) -> Option<ConfirmationRequest> {
|
|
// notify receiver about the event
|
|
self.notify_message(result.clone().map_or_else(
|
|
|| QueueEvent::RequestRejected(sender.request.id),
|
|
|_| QueueEvent::RequestConfirmed(sender.request.id),
|
|
));
|
|
|
|
// notify confirmation receiver about resolution
|
|
let result = result.ok_or_else(errors::request_rejected);
|
|
sender.sender.send(result);
|
|
|
|
Some(sender.request)
|
|
}
|
|
|
|
/// Notifies receiver about the event happening in this queue.
|
|
fn notify_message(&self, message: QueueEvent) {
|
|
for listener in &*self.on_event.read() {
|
|
listener(message.clone())
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Drop for ConfirmationsQueue {
|
|
fn drop(&mut self) {
|
|
self.finish();
|
|
}
|
|
}
|
|
|
|
impl SigningQueue for ConfirmationsQueue {
|
|
fn add_request(
|
|
&self,
|
|
request: ConfirmationPayload,
|
|
origin: Origin,
|
|
) -> Result<(U256, ConfirmationReceiver), QueueAddError> {
|
|
if self.len() > QUEUE_LIMIT {
|
|
return Err(QueueAddError::LimitReached);
|
|
}
|
|
|
|
// Increment id
|
|
let id = {
|
|
let mut last_id = self.id.lock();
|
|
*last_id += U256::from(1);
|
|
*last_id
|
|
};
|
|
// Add request to queue
|
|
let res = {
|
|
debug!(target: "own_tx", "Signer: New entry ({:?}) in confirmation queue.", id);
|
|
trace!(target: "own_tx", "Signer: ({:?}) : {:?}", id, request);
|
|
|
|
let mut queue = self.queue.write();
|
|
let (sender, receiver) = oneshot::oneshot::<ConfirmationResult>();
|
|
|
|
queue.insert(
|
|
id,
|
|
ConfirmationSender {
|
|
sender,
|
|
request: ConfirmationRequest {
|
|
id,
|
|
payload: request,
|
|
origin,
|
|
},
|
|
},
|
|
);
|
|
(id, receiver)
|
|
};
|
|
// Notify listeners
|
|
self.notify_message(QueueEvent::NewRequest(id));
|
|
Ok(res)
|
|
}
|
|
|
|
fn take(&self, id: &U256) -> Option<ConfirmationSender> {
|
|
self.queue.write().remove(id)
|
|
}
|
|
|
|
fn request_rejected(&self, sender: ConfirmationSender) -> Option<ConfirmationRequest> {
|
|
debug!(target: "own_tx", "Signer: Request rejected ({:?}).", sender.request.id);
|
|
self.notify_result(sender, None)
|
|
}
|
|
|
|
fn request_confirmed(
|
|
&self,
|
|
sender: ConfirmationSender,
|
|
result: ConfirmationResult,
|
|
) -> Option<ConfirmationRequest> {
|
|
debug!(target: "own_tx", "Signer: Request confirmed ({:?}).", sender.request.id);
|
|
self.notify_result(sender, Some(result))
|
|
}
|
|
|
|
fn request_untouched(&self, sender: ConfirmationSender) {
|
|
self.queue.write().insert(sender.request.id, sender);
|
|
}
|
|
|
|
fn requests(&self) -> Vec<ConfirmationRequest> {
|
|
let queue = self.queue.read();
|
|
queue
|
|
.values()
|
|
.map(|sender| sender.request.clone())
|
|
.collect()
|
|
}
|
|
|
|
fn len(&self) -> usize {
|
|
let queue = self.queue.read();
|
|
queue.len()
|
|
}
|
|
|
|
fn is_empty(&self) -> bool {
|
|
let queue = self.queue.read();
|
|
queue.is_empty()
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod test {
|
|
use ethereum_types::{Address, H256, U256};
|
|
use jsonrpc_core::futures::Future;
|
|
use parking_lot::Mutex;
|
|
use std::sync::Arc;
|
|
use v1::{
|
|
helpers::{
|
|
external_signer::{ConfirmationsQueue, QueueEvent, SigningQueue},
|
|
ConfirmationPayload, FilledTransactionRequest,
|
|
},
|
|
types::ConfirmationResponse,
|
|
};
|
|
|
|
fn request() -> ConfirmationPayload {
|
|
ConfirmationPayload::SendTransaction(FilledTransactionRequest {
|
|
transaction_type: Default::default(),
|
|
from: Address::from_low_u64_be(1),
|
|
used_default_from: false,
|
|
to: Some(Address::from_low_u64_be(2)),
|
|
gas_price: Some(U256::from(0)),
|
|
max_fee_per_gas: None,
|
|
gas: 10_000.into(),
|
|
value: 10_000_000.into(),
|
|
data: vec![],
|
|
nonce: None,
|
|
condition: None,
|
|
access_list: None,
|
|
max_priority_fee_per_gas: None,
|
|
})
|
|
}
|
|
|
|
#[test]
|
|
fn should_wait_for_hash() {
|
|
// given
|
|
let queue = Arc::new(ConfirmationsQueue::default());
|
|
let request = request();
|
|
|
|
// when
|
|
let (id, future) = queue.add_request(request, Default::default()).unwrap();
|
|
let sender = queue.take(&id).unwrap();
|
|
queue.request_confirmed(
|
|
sender,
|
|
Ok(ConfirmationResponse::SendTransaction(
|
|
H256::from_low_u64_be(1),
|
|
)),
|
|
);
|
|
|
|
// then
|
|
let confirmation = future.wait().unwrap();
|
|
assert_eq!(
|
|
confirmation,
|
|
Ok(ConfirmationResponse::SendTransaction(
|
|
H256::from_low_u64_be(1)
|
|
))
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn should_receive_notification() {
|
|
// given
|
|
let received = Arc::new(Mutex::new(vec![]));
|
|
let queue = Arc::new(ConfirmationsQueue::default());
|
|
let request = request();
|
|
|
|
// when
|
|
let r = received.clone();
|
|
queue.on_event(move |notification| {
|
|
r.lock().push(notification);
|
|
});
|
|
let _future = queue.add_request(request, Default::default()).unwrap();
|
|
queue.finish();
|
|
|
|
// then
|
|
let r = received.lock();
|
|
assert_eq!(r[0], QueueEvent::NewRequest(U256::from(1)));
|
|
assert_eq!(r[1], QueueEvent::Finish);
|
|
assert_eq!(r.len(), 2);
|
|
}
|
|
|
|
#[test]
|
|
fn should_add_transactions() {
|
|
// given
|
|
let queue = ConfirmationsQueue::default();
|
|
let request = request();
|
|
|
|
// when
|
|
let _future = queue
|
|
.add_request(request.clone(), Default::default())
|
|
.unwrap();
|
|
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.payload, request);
|
|
}
|
|
}
|