openethereum/miner/src/work_notify.rs
Marek Kotewicz c060d9584d
ethabi version 5 (#7723)
* Refactor updater to use ethabi-derive

* Grumble: do_call type alias

* Empty commit to trigger test re-run

* migration to ethabi-5.0

* migration to ethabi-5.0 in progress

* use ethabi_deriven to generate TransactAcl contract

* use ethabi_deriven to generate Registry contract

* hash-fetch uses ethabi_derive, removed retain cycle from updater, fixed #7720

* node-filter crate uses ethabi_derive to generate peer_set contract interface

* use LruCache in node-filter instead of HashMap

* validator_set engine uses ethabi_derive

* ethcore does not depend on native_contracts

* miner does no depend on native_contracts

* secret_store does not use native_contracts (in progress)

* removed native-contracts

* ethcore and updater does not depend on futures

* updated ethereum-types

* fixed all warnings caused by using new version of ethereum-types

* updated ethabi_derive && ethabi_contract to get rid of warnings

* removed another retain cycle in updater, fixed following minor version on update

* moved contracts out of native_contracts res

* updated ethabi_contract

* fixed failing test

* fixed failing test

* there is no need to create two contracts of the same kind any more

* simplify updater::ReleaseTrack conversion into u8 and add several tests for it

* applied review suggestions

* applied review suggestions
2018-02-09 09:32:06 +01:00

142 lines
4.0 KiB
Rust

// Copyright 2015-2017 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/>.
//! Sends HTTP notifications to a list of URLs every time new work is available.
extern crate ethash;
extern crate hyper;
use self::hyper::header::ContentType;
use self::hyper::method::Method;
use self::hyper::client::{Request, Response, Client};
use self::hyper::{Next, Url};
use self::hyper::net::HttpStream;
use self::ethash::SeedHashCompute;
use std::io::Write;
use ethereum_types::{H256, U256};
use parking_lot::Mutex;
/// Trait for notifying about new mining work
pub trait NotifyWork : Send + Sync {
/// Fired when new mining job available
fn notify(&self, pow_hash: H256, difficulty: U256, number: u64);
}
/// POSTs info about new work to given urls.
pub struct WorkPoster {
urls: Vec<Url>,
client: Mutex<Client<PostHandler>>,
seed_compute: Mutex<SeedHashCompute>,
}
impl WorkPoster {
/// Create new `WorkPoster`.
pub fn new(urls: &[String]) -> Self {
let urls = urls.into_iter().filter_map(|u| {
match Url::parse(u) {
Ok(url) => Some(url),
Err(e) => {
warn!("Error parsing URL {} : {}", u, e);
None
}
}
}).collect();
let client = WorkPoster::create_client();
WorkPoster {
client: Mutex::new(client),
urls: urls,
seed_compute: Mutex::new(SeedHashCompute::new()),
}
}
fn create_client() -> Client<PostHandler> {
Client::<PostHandler>::configure()
.keep_alive(true)
.build()
.expect("Error creating HTTP client")
}
}
/// Convert an Ethash difficulty to the target boundary. Basically just `f(x) = 2^256 / x`.
fn difficulty_to_boundary(difficulty: &U256) -> H256 {
if *difficulty <= U256::one() {
U256::max_value().into()
} else {
(((U256::one() << 255) / *difficulty) << 1).into()
}
}
impl NotifyWork for WorkPoster {
fn notify(&self, pow_hash: H256, difficulty: U256, number: u64) {
// TODO: move this to engine
let target = difficulty_to_boundary(&difficulty);
let seed_hash = &self.seed_compute.lock().hash_block_number(number);
let seed_hash = H256::from_slice(&seed_hash[..]);
let body = format!(
r#"{{ "result": ["0x{:x}","0x{:x}","0x{:x}","0x{:x}"] }}"#,
pow_hash, seed_hash, target, number
);
let mut client = self.client.lock();
for u in &self.urls {
if let Err(e) = client.request(u.clone(), PostHandler { body: body.clone() }) {
warn!("Error sending HTTP notification to {} : {}, retrying", u, e);
// TODO: remove this once https://github.com/hyperium/hyper/issues/848 is fixed
*client = WorkPoster::create_client();
if let Err(e) = client.request(u.clone(), PostHandler { body: body.clone() }) {
warn!("Error sending HTTP notification to {} : {}", u, e);
}
}
}
}
}
struct PostHandler {
body: String,
}
impl hyper::client::Handler<HttpStream> for PostHandler {
fn on_request(&mut self, request: &mut Request) -> Next {
request.set_method(Method::Post);
request.headers_mut().set(ContentType::json());
Next::write()
}
fn on_request_writable(&mut self, encoder: &mut hyper::Encoder<HttpStream>) -> Next {
if let Err(e) = encoder.write_all(self.body.as_bytes()) {
trace!("Error posting work data: {}", e);
}
encoder.close();
Next::read()
}
fn on_response(&mut self, _response: Response) -> Next {
Next::end()
}
fn on_response_readable(&mut self, _decoder: &mut hyper::Decoder<HttpStream>) -> Next {
Next::end()
}
fn on_error(&mut self, err: hyper::Error) -> Next {
trace!("Error posting work data: {}", err);
Next::end()
}
}