295 lines
8.6 KiB
JavaScript
295 lines
8.6 KiB
JavaScript
const Web3 = require('web3');
|
|
const async = require('async');
|
|
const Provider = require('./provider.js');
|
|
const BlockchainProcessLauncher = require('../processes/blockchainProcessLauncher');
|
|
const utils = require('../utils/utils');
|
|
const constants = require('../constants');
|
|
|
|
const WEB3_READY = 'web3Ready';
|
|
|
|
class Blockchain {
|
|
constructor(options) {
|
|
this.plugins = options.plugins;
|
|
this.logger = options.logger;
|
|
this.events = options.events;
|
|
this.contractsConfig = options.contractsConfig;
|
|
this.blockchainConfig = options.blockchainConfig;
|
|
this.web3 = options.web3;
|
|
this.locale = options.locale;
|
|
this.isDev = options.isDev;
|
|
this.web3Endpoint = '';
|
|
this.isWeb3Ready = false;
|
|
this.web3StartedInProcess = false;
|
|
|
|
if (!this.web3) {
|
|
this.initWeb3();
|
|
} else {
|
|
this.isWeb3Ready = true;
|
|
}
|
|
this.registerServiceCheck();
|
|
this.registerRequests();
|
|
this.registerWeb3Object();
|
|
}
|
|
|
|
initWeb3(cb) {
|
|
if (!cb) {
|
|
cb = function(){};
|
|
}
|
|
if (this.isWeb3Ready) {
|
|
this.events.emit(WEB3_READY);
|
|
return cb();
|
|
}
|
|
const self = this;
|
|
this.web3 = new Web3();
|
|
|
|
if (this.contractsConfig.deployment.type !== "rpc" && this.contractsConfig.deployment.type !== "ws") {
|
|
const message = __("contracts config error: unknown deployment type %s", this.contractsConfig.deployment.type);
|
|
this.logger.error(message);
|
|
return cb(message);
|
|
}
|
|
|
|
const protocol = (this.contractsConfig.deployment.type === "rpc") ? this.contractsConfig.deployment.protocol : 'ws';
|
|
let provider;
|
|
this.web3Endpoint = utils.buildUrl(protocol, this.contractsConfig.deployment.host, this.contractsConfig.deployment.port);//`${protocol}://${this.contractsConfig.deployment.host}:${this.contractsConfig.deployment.port}`;
|
|
const providerOptions = {
|
|
web3: this.web3,
|
|
accountsConfig: this.contractsConfig.deployment.accounts,
|
|
blockchainConfig: this.blockchainConfig,
|
|
logger: this.logger,
|
|
isDev: this.isDev,
|
|
type: this.contractsConfig.deployment.type,
|
|
web3Endpoint: self.web3Endpoint
|
|
};
|
|
provider = new Provider(providerOptions);
|
|
|
|
async.waterfall([
|
|
function checkNode(next) {
|
|
self.assertNodeConnection(true, (err) => {
|
|
if (err && self.web3StartedInProcess) {
|
|
// Already started blockchain in another node, we really have a node problem
|
|
self.logger.error(__('Unable to start the blockchain process. Is Geth installed?').red);
|
|
return next(err);
|
|
}
|
|
if (!err) {
|
|
self.isWeb3Ready = true;
|
|
self.events.emit(WEB3_READY);
|
|
return next();
|
|
}
|
|
self.web3StartedInProcess = true;
|
|
self.startBlockchainNode(() => {
|
|
// Need to re-initialize web3 to connect to the new blockchain node
|
|
provider.stop();
|
|
self.initWeb3(cb);
|
|
});
|
|
});
|
|
},
|
|
function startProvider(next) {
|
|
provider.startWeb3Provider(next);
|
|
},
|
|
function fundAccountsIfNeeded(next) {
|
|
self.isWeb3Ready = true;
|
|
provider.fundAccounts(next);
|
|
}
|
|
], (err) => {
|
|
self.registerWeb3Object();
|
|
cb(err);
|
|
});
|
|
}
|
|
|
|
onReady(callback) {
|
|
if (this.isWeb3Ready) {
|
|
return callback();
|
|
}
|
|
|
|
this.events.once(WEB3_READY, () => {
|
|
callback();
|
|
});
|
|
}
|
|
|
|
startBlockchainNode(callback) {
|
|
const self = this;
|
|
let blockchainProcess = new BlockchainProcessLauncher({
|
|
events: self.events,
|
|
logger: self.logger,
|
|
normalizeInput: utils.normalizeInput,
|
|
blockchainConfig: self.blockchainConfig,
|
|
locale: self.locale,
|
|
isDev: self.isDev
|
|
});
|
|
|
|
blockchainProcess.startBlockchainNode();
|
|
self.events.once(constants.blockchain.blockchainReady, () => {
|
|
callback();
|
|
});
|
|
}
|
|
|
|
registerServiceCheck() {
|
|
const self = this;
|
|
const NO_NODE = 'noNode';
|
|
|
|
this.events.request("services:register", 'Ethereum', function (cb) {
|
|
async.waterfall([
|
|
function checkNodeConnection(next) {
|
|
self.assertNodeConnection(true, (err) => {
|
|
if (err) {
|
|
return next(NO_NODE, {name: "No Blockchain node found", status: 'off'});
|
|
}
|
|
next();
|
|
});
|
|
},
|
|
function checkVersion(next) {
|
|
// TODO: web3_clientVersion method is currently not implemented in web3.js 1.0
|
|
self.web3._requestManager.send({method: 'web3_clientVersion', params: []}, (err, version) => {
|
|
if (err) {
|
|
return next(null, {name: "Ethereum node (version unknown)", status: 'on'});
|
|
}
|
|
if (version.indexOf("/") < 0) {
|
|
return next(null, {name: version, status: 'on'});
|
|
}
|
|
let nodeName = version.split("/")[0];
|
|
let versionNumber = version.split("/")[1].split("-")[0];
|
|
let name = nodeName + " " + versionNumber + " (Ethereum)";
|
|
|
|
return next(null, {name: name, status: 'on'});
|
|
});
|
|
}
|
|
], (err, statusObj) => {
|
|
if (err && err !== NO_NODE) {
|
|
return cb(err);
|
|
}
|
|
cb(statusObj);
|
|
});
|
|
}, 5000, 'off');
|
|
}
|
|
|
|
registerRequests() {
|
|
const self = this;
|
|
|
|
this.events.setCommandHandler("blockchain:defaultAccount:get", function(cb) {
|
|
cb(self.defaultAccount);
|
|
});
|
|
|
|
this.events.setCommandHandler("blockchain:defaultAccount:set", function(account, cb) {
|
|
self.setDefaultAccount(account);
|
|
cb();
|
|
});
|
|
|
|
this.events.setCommandHandler("blockchain:block:byNumber", function(blockNumber, cb) {
|
|
self.getBlock(blockNumber, cb);
|
|
});
|
|
|
|
this.events.setCommandHandler("blockchain:gasPrice", function(cb) {
|
|
self.getGasPrice(cb);
|
|
});
|
|
|
|
}
|
|
|
|
defaultAccount() {
|
|
return this.web3.eth.defaultAccount;
|
|
}
|
|
|
|
setDefaultAccount(account) {
|
|
this.web3.eth.defaultAccount = account;
|
|
}
|
|
|
|
getAccounts(cb) {
|
|
this.web3.eth.getAccounts(cb);
|
|
}
|
|
|
|
getCode(address, cb) {
|
|
this.web3.eth.getCode(address, cb);
|
|
}
|
|
|
|
getBlock(blockNumber, cb) {
|
|
this.web3.eth.getBlock(blockNumber, cb);
|
|
}
|
|
|
|
getGasPrice(cb) {
|
|
this.web3.eth.getGasPrice(cb);
|
|
}
|
|
|
|
ContractObject(params) {
|
|
return new this.web3.eth.Contract(params.abi);
|
|
}
|
|
|
|
deployContractObject(contractObject, params) {
|
|
return contractObject.deploy({arguments: params.arguments, data: params.data});
|
|
}
|
|
|
|
estimateDeployContractGas(deployObject, cb) {
|
|
return deployObject.estimateGas().then((gasValue) => {
|
|
cb(null, gasValue);
|
|
}).catch(cb);
|
|
}
|
|
|
|
deployContractFromObject(deployContractObject, params, cb) {
|
|
deployContractObject.send({
|
|
from: params.from, gas: params.gas, gasPrice: params.gasPrice
|
|
}).on('receipt', function(receipt) {
|
|
if (receipt.contractAddress !== undefined) {
|
|
cb(null, receipt);
|
|
}
|
|
}).on('error', cb);
|
|
}
|
|
|
|
assertNodeConnection(noLogs, cb) {
|
|
if (typeof noLogs === 'function') {
|
|
cb = noLogs;
|
|
noLogs = false;
|
|
}
|
|
const NO_NODE_ERROR = Error("error connecting to blockchain node");
|
|
const self = this;
|
|
|
|
async.waterfall([
|
|
function checkInstance(next) {
|
|
if (!self.web3) {
|
|
return next(Error("no web3 instance found"));
|
|
}
|
|
next();
|
|
},
|
|
function checkProvider(next) {
|
|
if (self.web3.currentProvider === undefined) {
|
|
return next(NO_NODE_ERROR);
|
|
}
|
|
next();
|
|
},
|
|
function pingEndpoint(next) {
|
|
if (!self.contractsConfig || !self.contractsConfig.deployment || !self.contractsConfig.deployment.host) {
|
|
return next();
|
|
}
|
|
const {host, port, type, protocol} = self.contractsConfig.deployment;
|
|
utils.pingEndpoint(host, port, type, protocol, self.blockchainConfig.wsOrigins.split(',')[0], next);
|
|
}
|
|
], function (err) {
|
|
if (!noLogs && err === NO_NODE_ERROR) {
|
|
self.logger.error(("Couldn't connect to an Ethereum node are you sure it's on?").red);
|
|
self.logger.info("make sure you have an Ethereum node or simulator running. e.g 'embark blockchain'".magenta);
|
|
}
|
|
cb(err);
|
|
});
|
|
}
|
|
|
|
determineDefaultAccount(cb) {
|
|
const self = this;
|
|
self.getAccounts(function (err, accounts) {
|
|
if (err) {
|
|
self.logger.error(err);
|
|
return cb(new Error(err));
|
|
}
|
|
let accountConfig = self.blockchainConfig.account;
|
|
let selectedAccount = accountConfig && accountConfig.address;
|
|
self.setDefaultAccount(selectedAccount || accounts[0]);
|
|
cb();
|
|
});
|
|
}
|
|
|
|
registerWeb3Object() {
|
|
// doesn't feel quite right, should be a cmd or plugin method
|
|
// can just be a command without a callback
|
|
this.events.emit("runcode:register", "web3", this.web3);
|
|
}
|
|
}
|
|
|
|
module.exports = Blockchain;
|
|
|