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author | kumavis <aaron@kumavis.me> | 2018-05-17 11:46:34 +0800 |
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committer | kumavis <aaron@kumavis.me> | 2018-05-17 11:46:34 +0800 |
commit | 088d7930e0895ef1802823c5fc843dd1c19b9661 (patch) | |
tree | a2aed8b980fa44254121021d0529169369d77992 /app/scripts/controllers/network/network.js | |
parent | 708422432c634ffbd4c73388f980c43f766b3355 (diff) | |
download | tangerine-wallet-browser-088d7930e0895ef1802823c5fc843dd1c19b9661.tar.gz tangerine-wallet-browser-088d7930e0895ef1802823c5fc843dd1c19b9661.tar.zst tangerine-wallet-browser-088d7930e0895ef1802823c5fc843dd1c19b9661.zip |
network - create provider and block-tracker via json-rpc-engine
Diffstat (limited to 'app/scripts/controllers/network/network.js')
-rw-r--r-- | app/scripts/controllers/network/network.js | 116 |
1 files changed, 63 insertions, 53 deletions
diff --git a/app/scripts/controllers/network/network.js b/app/scripts/controllers/network/network.js index 93fde7c57..c882c7d75 100644 --- a/app/scripts/controllers/network/network.js +++ b/app/scripts/controllers/network/network.js @@ -1,14 +1,17 @@ const assert = require('assert') const EventEmitter = require('events') -const createMetamaskProvider = require('web3-provider-engine/zero.js') -const SubproviderFromProvider = require('web3-provider-engine/subproviders/provider.js') -const createInfuraProvider = require('eth-json-rpc-infura/src/createProvider') const ObservableStore = require('obs-store') const ComposedStore = require('obs-store/lib/composed') const extend = require('xtend') const EthQuery = require('eth-query') -const createEventEmitterProxy = require('../../lib/events-proxy.js') const log = require('loglevel') +const createMetamaskMiddleware = require('./createMetamaskMiddleware') +const createInfuraClient = require('./createInfuraClient') +const createJsonRpcClient = require('./createJsonRpcClient') +const createLocalhostClient = require('./createLocalhostClient') +// const createEventEmitterProxy = require('../../lib/events-proxy.js') +const { createSwappableProxy, createEventEmitterProxy } = require('swappable-obj-proxy') + const { ROPSTEN, RINKEBY, @@ -38,21 +41,27 @@ module.exports = class NetworkController extends EventEmitter { this.providerStore = new ObservableStore(providerConfig) this.networkStore = new ObservableStore('loading') this.store = new ComposedStore({ provider: this.providerStore, network: this.networkStore }) - // create event emitter proxy - this._proxy = createEventEmitterProxy() - this.on('networkDidChange', this.lookupNetwork) + // provider and block tracker + this._provider = null + this._blockTracker = null + // provider and block tracker proxies - because the network changes + this._providerProxy = null + this._blockTrackerProxy = null } - initializeProvider (_providerParams) { - this._baseProviderParams = _providerParams + initializeProvider (providerParams) { + this._baseProviderParams = providerParams const { type, rpcTarget } = this.providerStore.getState() this._configureProvider({ type, rpcTarget }) - this._proxy.on('block', this._logBlock.bind(this)) - this._proxy.on('error', this.verifyNetwork.bind(this)) - this.ethQuery = new EthQuery(this._proxy) this.lookupNetwork() - return this._proxy + } + + // return the proxies so the references will always be good + getProviderAndBlockTracker() { + const provider = this._providerProxy + const blockTracker = this._blockTracker + return { provider, blockTracker } } verifyNetwork () { @@ -74,10 +83,11 @@ module.exports = class NetworkController extends EventEmitter { lookupNetwork () { // Prevent firing when provider is not defined. - if (!this.ethQuery || !this.ethQuery.sendAsync) { - return log.warn('NetworkController - lookupNetwork aborted due to missing ethQuery') + if (!this._provider) { + return log.warn('NetworkController - lookupNetwork aborted due to missing provider') } - this.ethQuery.sendAsync({ method: 'net_version' }, (err, network) => { + const ethQuery = new EthQuery(this._provider) + ethQuery.sendAsync({ method: 'net_version' }, (err, network) => { if (err) return this.setNetworkState('loading') log.info('web3.getNetwork returned ' + network) this.setNetworkState(network) @@ -123,7 +133,7 @@ module.exports = class NetworkController extends EventEmitter { this._configureInfuraProvider(opts) // other type-based rpc endpoints } else if (type === LOCALHOST) { - this._configureStandardProvider({ rpcUrl: LOCALHOST_RPC_URL }) + this._configureLocalhostProvider() // url-based rpc endpoints } else if (type === 'rpc'){ this._configureStandardProvider({ rpcUrl: rpcTarget }) @@ -133,47 +143,47 @@ module.exports = class NetworkController extends EventEmitter { } _configureInfuraProvider ({ type }) { - log.info('_configureInfuraProvider', type) - const infuraProvider = createInfuraProvider({ network: type }) - const infuraSubprovider = new SubproviderFromProvider(infuraProvider) - const providerParams = extend(this._baseProviderParams, { - engineParams: { - pollingInterval: 8000, - blockTrackerProvider: infuraProvider, - }, - dataSubprovider: infuraSubprovider, - }) - const provider = createMetamaskProvider(providerParams) - this._setProvider(provider) + log.info('NetworkController - configureInfuraProvider', type) + const networkClient = createInfuraClient({ network: type }) + this._setNetworkClient(networkClient) + } + + _configureLocalhostProvider () { + log.info('NetworkController - configureLocalhostProvider') + const networkClient = createLocalhostClient() + this._setNetworkClient(networkClient) } _configureStandardProvider ({ rpcUrl }) { - const providerParams = extend(this._baseProviderParams, { - rpcUrl, - engineParams: { - pollingInterval: 8000, - }, - }) - const provider = createMetamaskProvider(providerParams) - this._setProvider(provider) - } - - _setProvider (provider) { - // collect old block tracker events - const oldProvider = this._provider - let blockTrackerHandlers - if (oldProvider) { - // capture old block handlers - blockTrackerHandlers = oldProvider._blockTracker.proxyEventHandlers - // tear down - oldProvider.removeAllListeners() - oldProvider.stop() + log.info('NetworkController - configureStandardProvider', rpcUrl) + const networkClient = createJsonRpcClient({ rpcUrl }) + this._setNetworkClient(networkClient) + } + + _setNetworkClient ({ networkMiddleware, blockTracker }) { + const metamaskMiddleware = createMetamaskMiddleware(this._baseProviderParams) + const engine = new JsonRpcEngine() + engine.push(metamaskMiddleware) + engine.push(networkMiddleware) + const provider = providerFromEngine(engine) + this._setProviderAndBlockTracker({ provider, blockTracker }) + } + + _setProviderAndBlockTracker ({ provider, blockTracker }) { + // update or intialize proxies + if (this._providerProxy) { + this._providerProxy.setTarget(provider) + } else { + this._providerProxy = createSwappableProxy(provider) + } + if (this._blockTrackerProxy) { + this._blockTrackerProxy.setTarget(blockTracker) + } else { + this._blockTrackerProxy = createEventEmitterProxy(blockTracker) } - // override block tracler - provider._blockTracker = createEventEmitterProxy(provider._blockTracker, blockTrackerHandlers) - // set as new provider + // set new provider and blockTracker this._provider = provider - this._proxy.setTarget(provider) + this._blockTracker = blockTracker } _logBlock (block) { |