69 lines
2.7 KiB
TypeScript
69 lines
2.7 KiB
TypeScript
// HACK: web3 injects XMLHttpRequest into the global scope and ProviderEngine checks XMLHttpRequest
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// to know whether it is running in a browser or node environment. We need it to be undefined since
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// we are not running in a browser env.
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// Filed issue: https://github.com/ethereum/web3.js/issues/844
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(global as any).XMLHttpRequest = undefined;
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import ProviderEngine = require('web3-provider-engine');
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import RpcSubprovider = require('web3-provider-engine/subproviders/rpc');
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import { EmptyWalletSubprovider, FakeGasEstimateSubprovider, GanacheSubprovider } from '@0xproject/subproviders';
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import { Provider } from 'ethereum-types';
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import * as fs from 'fs';
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import * as _ from 'lodash';
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import * as process from 'process';
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import { constants } from './constants';
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import { env, EnvVars } from './env';
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export interface Web3Config {
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hasAddresses?: boolean; // default: true
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shouldUseInProcessGanache?: boolean; // default: false
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rpcUrl?: string; // default: localhost:8545
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shouldUseFakeGasEstimate?: boolean; // default: true
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}
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export const web3Factory = {
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getRpcProvider(config: Web3Config = {}): ProviderEngine {
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const provider = new ProviderEngine();
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const hasAddresses = _.isUndefined(config.hasAddresses) || config.hasAddresses;
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config.shouldUseFakeGasEstimate =
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_.isUndefined(config.shouldUseFakeGasEstimate) || config.shouldUseFakeGasEstimate;
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if (!hasAddresses) {
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provider.addProvider(new EmptyWalletSubprovider());
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}
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if (config.shouldUseFakeGasEstimate) {
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provider.addProvider(new FakeGasEstimateSubprovider(constants.GAS_LIMIT));
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}
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const logger = {
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log: (arg: any) => {
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fs.appendFileSync('ganache.log', `${arg}\n`);
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},
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};
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const shouldUseInProcessGanache = !!config.shouldUseInProcessGanache;
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if (shouldUseInProcessGanache) {
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if (!_.isUndefined(config.rpcUrl)) {
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throw new Error('Cannot use both GanacheSubrovider and RPCSubprovider');
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}
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provider.addProvider(
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new GanacheSubprovider({
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gasLimit: constants.GAS_LIMIT,
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logger,
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verbose: env.parseBoolean(EnvVars.VerboseGanache),
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port: 8545,
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network_id: 50,
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mnemonic: 'concert load couple harbor equip island argue ramp clarify fence smart topic',
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}),
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);
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} else {
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provider.addProvider(
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new RpcSubprovider({
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rpcUrl: config.rpcUrl || constants.RPC_URL,
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}),
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);
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}
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provider.start();
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return provider;
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},
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};
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