You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
125 lines
3.7 KiB
125 lines
3.7 KiB
const pump = require('pump')
|
|
const RpcEngine = require('json-rpc-engine')
|
|
const createErrorMiddleware = require('./createErrorMiddleware')
|
|
const createIdRemapMiddleware = require('json-rpc-engine/src/idRemapMiddleware')
|
|
const createStreamMiddleware = require('json-rpc-middleware-stream')
|
|
const LocalStorageStore = require('obs-store')
|
|
const asStream = require('obs-store/lib/asStream')
|
|
const ObjectMultiplex = require('obj-multiplex')
|
|
|
|
module.exports = MetamaskInpageProvider
|
|
|
|
function MetamaskInpageProvider (connectionStream) {
|
|
const self = this
|
|
|
|
// setup connectionStream multiplexing
|
|
const mux = self.mux = new ObjectMultiplex()
|
|
pump(
|
|
connectionStream,
|
|
mux,
|
|
connectionStream,
|
|
(err) => logStreamDisconnectWarning('MetaMask', err)
|
|
)
|
|
|
|
// subscribe to metamask public config (one-way)
|
|
self.publicConfigStore = new LocalStorageStore({ storageKey: 'MetaMask-Config' })
|
|
|
|
pump(
|
|
mux.createStream('publicConfig'),
|
|
asStream(self.publicConfigStore),
|
|
(err) => logStreamDisconnectWarning('MetaMask PublicConfigStore', err)
|
|
)
|
|
|
|
// ignore phishing warning message (handled elsewhere)
|
|
mux.ignoreStream('phishing')
|
|
|
|
// connect to async provider
|
|
const streamMiddleware = createStreamMiddleware()
|
|
pump(
|
|
streamMiddleware.stream,
|
|
mux.createStream('provider'),
|
|
streamMiddleware.stream,
|
|
(err) => logStreamDisconnectWarning('MetaMask RpcProvider', err)
|
|
)
|
|
|
|
// handle sendAsync requests via dapp-side rpc engine
|
|
const rpcEngine = new RpcEngine()
|
|
rpcEngine.push(createIdRemapMiddleware())
|
|
rpcEngine.push(createErrorMiddleware())
|
|
rpcEngine.push(streamMiddleware)
|
|
self.rpcEngine = rpcEngine
|
|
}
|
|
|
|
// handle sendAsync requests via asyncProvider
|
|
// also remap ids inbound and outbound
|
|
MetamaskInpageProvider.prototype.sendAsync = function (payload, cb) {
|
|
const self = this
|
|
|
|
if (payload.method === 'eth_signTypedData') {
|
|
console.warn('MetaMask: This experimental version of eth_signTypedData will be deprecated in the next release in favor of the standard as defined in EIP-712. See https://git.io/fNzPl for more information on the new standard.')
|
|
}
|
|
|
|
self.rpcEngine.handle(payload, cb)
|
|
}
|
|
|
|
|
|
MetamaskInpageProvider.prototype.send = function (payload) {
|
|
const self = this
|
|
|
|
let selectedAddress
|
|
let result = null
|
|
switch (payload.method) {
|
|
|
|
case 'eth_accounts':
|
|
// read from localStorage
|
|
selectedAddress = self.publicConfigStore.getState().selectedAddress
|
|
result = selectedAddress ? [selectedAddress] : []
|
|
break
|
|
|
|
case 'eth_coinbase':
|
|
// read from localStorage
|
|
selectedAddress = self.publicConfigStore.getState().selectedAddress
|
|
result = selectedAddress || null
|
|
break
|
|
|
|
case 'eth_uninstallFilter':
|
|
self.sendAsync(payload, noop)
|
|
result = true
|
|
break
|
|
|
|
case 'net_version':
|
|
const networkVersion = self.publicConfigStore.getState().networkVersion
|
|
result = networkVersion || null
|
|
break
|
|
|
|
// throw not-supported Error
|
|
default:
|
|
var link = 'https://github.com/MetaMask/faq/blob/master/DEVELOPERS.md#dizzy-all-async---think-of-metamask-as-a-light-client'
|
|
var message = `The MetaMask Web3 object does not support synchronous methods like ${payload.method} without a callback parameter. See ${link} for details.`
|
|
throw new Error(message)
|
|
|
|
}
|
|
|
|
// return the result
|
|
return {
|
|
id: payload.id,
|
|
jsonrpc: payload.jsonrpc,
|
|
result: result,
|
|
}
|
|
}
|
|
|
|
MetamaskInpageProvider.prototype.isConnected = function () {
|
|
return true
|
|
}
|
|
|
|
MetamaskInpageProvider.prototype.isMetaMask = true
|
|
|
|
// util
|
|
|
|
function logStreamDisconnectWarning (remoteLabel, err) {
|
|
let warningMsg = `MetamaskInpageProvider - lost connection to ${remoteLabel}`
|
|
if (err) warningMsg += '\n' + err.stack
|
|
console.warn(warningMsg)
|
|
}
|
|
|
|
function noop () {}
|
|
|