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const ProviderEngine = require('web3-provider-engine')
const CacheSubprovider = require('web3-provider-engine/subproviders/cache.js')
const StaticSubprovider = require('web3-provider-engine/subproviders/static.js')
const FilterSubprovider = require('web3-provider-engine/subproviders/filters.js')
const VmSubprovider = require('web3-provider-engine/subproviders/vm.js')
const LightWalletSubprovider = require('web3-provider-engine/subproviders/lightwallet.js')
const RpcSubprovider = require('web3-provider-engine/subproviders/rpc.js')
module.exports = metamaskProvider
function metamaskProvider(opts){
var engine = new ProviderEngine()
// cache layer
engine.addProvider(new CacheSubprovider())
// static results
engine.addProvider(new StaticSubprovider({
web3_clientVersion: 'MetaMask-ProviderEngine/v0.0.0/javascript',
net_listening: true,
eth_hashrate: '0x0',
eth_mining: false,
eth_syncing: true,
})
// filters
engine.addProvider(new FilterSubprovider())
// vm
engine.addProvider(new VmSubprovider())
// id mgmt
engine.addProvider(new LightWalletSubprovider())
// data source
engine.addProvider(new RpcSubprovider({
rpcUrl: 'https://testrpc.metamask.io/',
}))
// log new blocks
engine.on('block', function(block){
// lazy hack - move caching and current block to engine
engine.currentBlock = block
console.log('================================')
console.log('BLOCK CHANGED:', '#'+block.number.toString('hex'), '0x'+block.hash.toString('hex'))
console.log('================================')
})
// start polling for blocks
engine.start()
return engine
}
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