49fdd23d58
* Move secureApi to shell
* Extract isTestnet test
* Use mobx + subscriptions for status
* Re-add status indicator
* Add lerna
* Move intial packages to js/packages
* Move 3rdparty/{email,sms}-verification to correct location
* Move package.json & README to library src
* Move tests for library packages
* Move views & dapps to packages
* Move i18n to root
* Move shell to actual src (main app)
* Remove ~ references
* Change ~ to root (explicit imports)
* Finalise convert of ~
* Move views into dapps as well
* Move dapps to packages/
* Fix references
* Update css
* Update test spec locations
* Update tests
* Case fix
* Skip flakey tests
* Update enzyme
* Skip previously ignored tests
* Allow empty api for hw
* Re-add theme for embed
102 lines
2.5 KiB
JavaScript
102 lines
2.5 KiB
JavaScript
// 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/>.
|
|
|
|
import EventEmitter from 'eventemitter3';
|
|
|
|
const defaults = {
|
|
from: 0,
|
|
to: 'latest',
|
|
interval: 5000,
|
|
filter: () => true
|
|
};
|
|
|
|
const subscribeToEvents = (contract, events, opt = {}) => {
|
|
const { api } = contract;
|
|
|
|
opt = Object.assign({}, defaults, opt);
|
|
|
|
let filter = null;
|
|
let interval = null;
|
|
|
|
const unsubscribe = () => {
|
|
if (filter) {
|
|
filter
|
|
.then((filterId) => {
|
|
return api.eth.uninstallFilter(filterId);
|
|
})
|
|
.catch((err) => {
|
|
emitter.emit('error', err);
|
|
});
|
|
filter = null;
|
|
}
|
|
if (interval) {
|
|
clearInterval(interval);
|
|
interval = null;
|
|
}
|
|
};
|
|
|
|
const emitter = new EventEmitter();
|
|
|
|
emitter.unsubscribe = unsubscribe;
|
|
|
|
const fetcher = (method, filterId) => () => {
|
|
api
|
|
.eth[method](filterId)
|
|
.then((logs) => {
|
|
logs = contract.parseEventLogs(logs);
|
|
|
|
for (let log of logs) {
|
|
if (opt.filter(log)) {
|
|
emitter.emit('log', log);
|
|
emitter.emit(log.event, log);
|
|
}
|
|
}
|
|
})
|
|
.catch((err) => {
|
|
emitter.emit('error', err);
|
|
});
|
|
};
|
|
|
|
const signatures = events
|
|
.filter((event) => contract.instance[event])
|
|
.map((event) => contract.instance[event].signature);
|
|
|
|
filter = api.eth
|
|
.newFilter({
|
|
fromBlock: opt.from,
|
|
toBlock: opt.to,
|
|
address: contract.address,
|
|
topics: [signatures]
|
|
})
|
|
.then((filterId) => {
|
|
fetcher('getFilterLogs', filterId)(); // fetch immediately
|
|
|
|
const fetchChanges = fetcher('getFilterChanges', filterId);
|
|
|
|
interval = setInterval(fetchChanges, opt.interval);
|
|
|
|
return filterId;
|
|
})
|
|
.catch((err) => {
|
|
emitter.emit('error', err);
|
|
throw err; // reject Promise
|
|
});
|
|
|
|
return emitter;
|
|
};
|
|
|
|
export default subscribeToEvents;
|