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metamask-extension/app/scripts/lib/zero.js
2016-03-31 16:32:35 -07:00

66 lines
2.0 KiB
JavaScript

const ProviderEngine = require('web3-provider-engine/index.js')
const DefaultFixture = require('web3-provider-engine/subproviders/default-fixture.js')
const NonceTrackerSubprovider = require('web3-provider-engine/subproviders/nonce-tracker.js')
const CacheSubprovider = require('web3-provider-engine/subproviders/cache.js')
const FilterSubprovider = require('web3-provider-engine/subproviders/filters.js')
const HookedWalletSubprovider = require('web3-provider-engine/subproviders/hooked-wallet.js')
const RpcSubprovider = require('web3-provider-engine/subproviders/rpc.js')
const EtherscanSubprovider = require('web3-provider-engine/subproviders/etherscan.js')
module.exports = ZeroClientProvider
function ZeroClientProvider(opts){
opts = opts || {}
var engine = new ProviderEngine()
// static
var staticSubprovider = new DefaultFixture()
engine.addProvider(staticSubprovider)
// nonce tracker
engine.addProvider(new NonceTrackerSubprovider())
// cache layer
var cacheSubprovider = new CacheSubprovider()
engine.addProvider(cacheSubprovider)
// filters
var filterSubprovider = new FilterSubprovider()
engine.addProvider(filterSubprovider)
// id mgmt
var idmgmtSubprovider = new HookedWalletSubprovider({
getAccounts: opts.getAccounts,
approveTransaction: opts.approveTransaction,
signTransaction: opts.signTransaction,
})
engine.addProvider(idmgmtSubprovider)
// data source
var dataProvider
if (!opts.etherscan) {
dataProvider = new RpcSubprovider({
rpcUrl: opts.rpcUrl || 'https://testrpc.metamask.io/',
})
} else {
dataProvider = new EtherscanSubprovider()
}
engine.addProvider(dataProvider)
// // log new blocks
// engine.on('block', function(block){
// console.log('================================')
// console.log('BLOCK CHANGED:', '#'+block.number.toString('hex'), '0x'+block.hash.toString('hex'))
// console.log('================================')
// })
// start polling
engine.start()
return engine
}