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web3providerfix_rinkeby.tar
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web3providerfix_rinkeby.tar
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node_modules/ 0000755 0001750 0001750 00000000000 13403147072 013346 5 ustar richard richard node_modules/web3-provider-engine/ 0000755 0001750 0001750 00000000000 13403147072 017301 5 ustar richard richard node_modules/web3-provider-engine/subproviders/ 0000755 0001750 0001750 00000000000 13403147072 022030 5 ustar richard richard node_modules/web3-provider-engine/subproviders/websocket.js 0000755 0001750 0001750 00000010463 13403147141 024360 0 ustar richard richard const Backoff = require('backoff')
const EventEmitter = require('events')
const inherits = require('util').inherits
const WebSocket = global.WebSocket || require('ws')
const Subprovider = require('./subprovider')
const createPayload = require('../util/create-payload')
class WebsocketSubprovider
extends Subprovider {
constructor({ rpcUrl, debug, origin }) {
super()
// inherit from EventEmitter
EventEmitter.call(this)
Object.defineProperties(this, {
_backoff: {
value: Backoff.exponential({
randomisationFactor: 0.2,
maxDelay: 5000
})
},
_connectTime: {
value: null,
writable: true
},
_log: {
value: debug
? (...args) => console.info.apply(console, ['[WSProvider]', ...args])
: () => { }
},
_origin: {
value: origin
},
_pendingRequests: {
value: new Map()
},
_socket: {
value: null,
writable: true
},
_unhandledRequests: {
value: []
},
_url: {
value: rpcUrl
}
})
this._handleSocketClose = this._handleSocketClose.bind(this)
this._handleSocketMessage = this._handleSocketMessage.bind(this)
this._handleSocketOpen = this._handleSocketOpen.bind(this)
// Called when a backoff timeout has finished. Time to try reconnecting.
this._backoff.on('ready', () => {
this._openSocket()
})
this._openSocket()
}
handleRequest(payload, next, end) {
if (!this._socket || this._socket.readyState !== WebSocket.OPEN) {
this._unhandledRequests.push(Array.from(arguments))
this._log('Socket not open. Request queued.')
return
}
this._pendingRequests.set(payload.id, [payload, end])
const newPayload = createPayload(payload)
delete newPayload.origin
this._socket.send(JSON.stringify(newPayload))
this._log(`Sent: ${newPayload.method} #${newPayload.id}`)
}
_handleSocketClose({ reason, code }) {
this._log(`Socket closed, code ${code} (${reason || 'no reason'})`)
// If the socket has been open for longer than 5 seconds, reset the backoff
if (this._connectTime && Date.now() - this._connectTime > 5000) {
this._backoff.reset()
}
this._socket.removeEventListener('close', this._handleSocketClose)
this._socket.removeEventListener('message', this._handleSocketMessage)
this._socket.removeEventListener('open', this._handleSocketOpen)
this._socket = null
this._backoff.backoff()
}
_handleSocketMessage(message) {
let payload
try {
payload = JSON.parse(message.data)
} catch (e) {
this._log('Received a message that is not valid JSON:', payload)
return
}
// check if server-sent notification
if (payload.id === undefined) {
return this.emit('data', null, payload)
}
// ignore if missing
if (!this._pendingRequests.has(payload.id)) {
return
}
// retrieve payload + arguments
const [originalReq, end] = this._pendingRequests.get(payload.id)
this._pendingRequests.delete(payload.id)
this._log(`Received: ${originalReq.method} #${payload.id}`)
// forward response
if (payload.error) {
return end(new Error(payload.error.message))
}
end(null, payload.result)
}
_handleSocketOpen() {
this._log('Socket open.')
this._connectTime = Date.now()
// Any pending requests need to be resent because our session was lost
// and will not get responses for them in our new session.
this._pendingRequests.forEach(([payload, end]) => {
this._unhandledRequests.push([payload, null, end])
})
this._pendingRequests.clear()
const unhandledRequests = this._unhandledRequests.splice(0, this._unhandledRequests.length)
unhandledRequests.forEach(request => {
this.handleRequest.apply(this, request)
})
}
_openSocket() {
this._log('Opening socket...')
this._socket = new WebSocket(this._url); //, null, {origin: this._origin})
this._socket.addEventListener('close', this._handleSocketClose)
this._socket.addEventListener('message', this._handleSocketMessage)
this._socket.addEventListener('open', this._handleSocketOpen)
}
}
// multiple inheritance
Object.assign(WebsocketSubprovider.prototype, EventEmitter.prototype)
module.exports = WebsocketSubprovider