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.
94 lines
3.0 KiB
94 lines
3.0 KiB
const Streams = require('mississippi')
|
|
const ObjectMultiplex = require('./obj-multiplex')
|
|
const StreamProvider = require('web3-stream-provider')
|
|
const RemoteStore = require('./remote-store.js').RemoteStore
|
|
|
|
module.exports = MetamaskInpageProvider
|
|
|
|
function MetamaskInpageProvider (connectionStream) {
|
|
const self = this
|
|
|
|
// setup connectionStream multiplexing
|
|
var multiStream = ObjectMultiplex()
|
|
Streams.pipe(connectionStream, multiStream, connectionStream, function (err) {
|
|
console.warn('MetamaskInpageProvider - lost connection to MetaMask')
|
|
if (err) throw err
|
|
})
|
|
self.multiStream = multiStream
|
|
|
|
// subscribe to metamask public config
|
|
var publicConfigStore = remoteStoreWithLocalStorageCache('MetaMask-Config')
|
|
var storeStream = publicConfigStore.createStream()
|
|
Streams.pipe(storeStream, multiStream.createStream('publicConfig'), storeStream, function (err) {
|
|
console.warn('MetamaskInpageProvider - lost connection to MetaMask publicConfig')
|
|
if (err) throw err
|
|
})
|
|
self.publicConfigStore = publicConfigStore
|
|
|
|
// connect to async provider
|
|
var asyncProvider = new StreamProvider()
|
|
Streams.pipe(asyncProvider, multiStream.createStream('provider'), asyncProvider, function (err) {
|
|
console.warn('MetamaskInpageProvider - lost connection to MetaMask provider')
|
|
if (err) throw err
|
|
})
|
|
asyncProvider.on('error', console.error.bind(console))
|
|
self.asyncProvider = asyncProvider
|
|
// overwrite own sendAsync method
|
|
self.sendAsync = asyncProvider.sendAsync.bind(asyncProvider)
|
|
}
|
|
|
|
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.get('selectedAddress')
|
|
result = selectedAddress ? [selectedAddress] : []
|
|
break
|
|
|
|
case 'eth_coinbase':
|
|
// read from localStorage
|
|
selectedAddress = self.publicConfigStore.get('selectedAddress')
|
|
result = selectedAddress || '0x0000000000000000000000000000000000000000'
|
|
break
|
|
|
|
// throw not-supported Error
|
|
default:
|
|
var message = 'The MetaMask Web3 object does not support synchronous methods. See https://github.com/MetaMask/faq/blob/master/DEVELOPERS.md#all-async---think-of-metamask-as-a-light-client for details.'
|
|
throw new Error(message)
|
|
|
|
}
|
|
|
|
// return the result
|
|
return {
|
|
id: payload.id,
|
|
jsonrpc: payload.jsonrpc,
|
|
result: result,
|
|
}
|
|
}
|
|
|
|
MetamaskInpageProvider.prototype.sendAsync = function () {
|
|
throw new Error('MetamaskInpageProvider - sendAsync not overwritten')
|
|
}
|
|
|
|
MetamaskInpageProvider.prototype.isConnected = function () {
|
|
return true
|
|
}
|
|
|
|
// util
|
|
|
|
function remoteStoreWithLocalStorageCache (storageKey) {
|
|
// read local cache
|
|
var initState = JSON.parse(localStorage[storageKey] || '{}')
|
|
var store = new RemoteStore(initState)
|
|
// cache the latest state locally
|
|
store.subscribe(function (state) {
|
|
localStorage[storageKey] = JSON.stringify(state)
|
|
})
|
|
|
|
return store
|
|
}
|
|
|