119 lines
3.0 KiB
JavaScript
119 lines
3.0 KiB
JavaScript
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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import { outTransaction } from '../format/output';
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export default class Signer {
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constructor (updateSubscriptions, api, subscriber) {
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this._subscriber = subscriber;
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this._api = api;
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this._updateSubscriptions = updateSubscriptions;
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this._started = false;
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// Try to restart subscription if transport is closed
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this._api.transport.on('close', () => {
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if (this.isStarted) {
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this.start();
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}
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});
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}
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get isStarted () {
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return this._started;
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}
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start () {
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this._started = true;
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if (this._api.isPubSub) {
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const subscription = this._api.pubsub
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.subscribeAndGetResult(
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callback => this._api.pubsub.signer.pendingRequests(callback),
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requests => {
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this.updateSubscriptions(requests);
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return requests;
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}
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);
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return Promise.all([
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this._listRequests(false),
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subscription
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]);
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}
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return Promise.all([
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this._listRequests(true),
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this._loggingSubscribe()
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]);
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}
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updateSubscriptions (requests) {
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return this._updateSubscriptions('signer_requestsToConfirm', null, requests);
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}
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_listRequests = (doTimeout) => {
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const nextTimeout = (timeout = 1000, forceTimeout = doTimeout) => {
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if (forceTimeout) {
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setTimeout(() => {
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this._listRequests(doTimeout);
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}, timeout);
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}
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};
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if (!this._api.transport.isConnected) {
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nextTimeout(500, true);
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return;
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}
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return this._api.signer
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.requestsToConfirm()
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.then((requests) => {
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this.updateSubscriptions(requests);
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nextTimeout();
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})
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.catch(() => nextTimeout());
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}
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_postTransaction (data) {
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const request = {
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transaction: outTransaction(data.params[0]),
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requestId: data.json.result.result
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};
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this._updateSubscriptions('parity_postTransaction', null, request);
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}
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_loggingSubscribe () {
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return this._subscriber.subscribe('logging', (error, data) => {
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if (error || !data) {
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return;
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}
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switch (data.method) {
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case 'eth_sendTransaction':
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case 'eth_sendRawTransaction':
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this._listRequests(false);
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return;
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case 'parity_postTransaction':
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this._postTransaction(data);
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this._listRequests(false);
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return;
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}
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});
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}
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}
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