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// HACK: web3 injects XMLHttpRequest into the global scope and ProviderEngine checks XMLHttpRequest
// to know whether it is running in a browser or node environment. We need it to be undefined since
// we are not running in a browser env.
// Filed issue: https://github.com/ethereum/web3.js/issues/844
(global as any).XMLHttpRequest = undefined;
import ProviderEngine = require('web3-provider-engine');
import RpcSubprovider = require('web3-provider-engine/subproviders/rpc');
import {EmptyWalletSubprovider} from './subproviders/empty_wallet_subprovider';
import {FakeGasEstimateSubprovider} from './subproviders/fake_gas_estimate_subprovider';
import {constants} from './constants';
// HACK: web3 leaks XMLHttpRequest into the global scope and causes requests to hang
// because they are using the wrong XHR package.
// importing web3 after subproviders fixes this issue
// Filed issue: https://github.com/ethereum/web3.js/issues/844
// tslint:disable-next-line:ordered-imports
import * as Web3 from 'web3';
export const web3Factory = {
create(hasAddresses: boolean = true): Web3 {
const provider = this.getRpcProvider(hasAddresses);
const web3 = new Web3();
web3.setProvider(provider);
return web3;
},
getRpcProvider(hasAddresses: boolean = true): Web3.Provider {
const provider = new ProviderEngine();
if (!hasAddresses) {
provider.addProvider(new EmptyWalletSubprovider());
}
provider.addProvider(new FakeGasEstimateSubprovider(constants.GAS_ESTIMATE));
provider.addProvider(new RpcSubprovider({
rpcUrl: constants.RPC_URL,
}));
provider.start();
return provider;
},
};
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