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74 lines
2.1 KiB
74 lines
2.1 KiB
const Web3 = require('web3')
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const createPayload = require('web3-provider-engine/util/create-payload')
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const StreamProvider = require('./lib/stream-provider.js')
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const LocalMessageDuplexStream = require('./lib/local-message-stream.js')
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// setup plugin communication
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var pluginStream = new LocalMessageDuplexStream({
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name: 'inpage',
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target: 'contentscript',
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})
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var remoteProvider = new StreamProvider()
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remoteProvider.pipe(pluginStream).pipe(remoteProvider)
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// handle synchronous methods remotely
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// handle accounts cache
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var accountsCache = []
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setInterval(populateAccountsCache, 1000)
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function populateAccountsCache(){
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remoteProvider.sendAsync(createPayload({
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method: 'eth_accounts',
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params: [],
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note: 'from metamask inpage provider',
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}), function(err, response){
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if (err) return console.error('MetaMask - Error polling accounts')
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// update localStorage
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var accounts = response.result
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if (accounts.toString() !== accountsCache.toString()) {
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accountsCache = accounts
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localStorage['MetaMask-Accounts'] = JSON.stringify(accounts)
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}
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})
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}
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var syncProvider = new Web3.providers.HttpProvider('https://rawtestrpc.metamask.io/')
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// var unsupportedMethods = ['eth_accounts']
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remoteProvider.send = function(payload){
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var result = null
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switch (payload.method) {
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case 'eth_accounts':
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// read from localStorage
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accountsCache = JSON.parse(localStorage['MetaMask-Accounts'] || '[]')
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result = accountsCache
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break
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case 'eth_coinbase':
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// read from localStorage
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accountsCache = JSON.parse(localStorage['MetaMask-Accounts'] || '[]')
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result = accountsCache[0] || '0x0000000000000000000000000000000000000000'
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break
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// fallback to normal rpc
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default:
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return syncProvider.send(payload)
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}
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// return the result
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return {
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id: payload.id,
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jsonrpc: payload.jsonrpc,
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result: result,
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}
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}
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// create web3
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var web3 = new Web3(remoteProvider)
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window.web3 = web3
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web3.setProvider = function(){
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console.log('MetaMask Extension - overrode web3.setProvider')
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}
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console.log('MetaMask Extension - injected web3') |