43 lines
1.7 KiB
TypeScript
43 lines
1.7 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 } from './subproviders/empty_wallet_subprovider';
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import { FakeGasEstimateSubprovider } from './subproviders/fake_gas_estimate_subprovider';
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import { constants } from './constants';
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// HACK: web3 leaks XMLHttpRequest into the global scope and causes requests to hang
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// because they are using the wrong XHR package.
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// importing web3 after subproviders fixes this issue
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// Filed issue: https://github.com/ethereum/web3.js/issues/844
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// tslint:disable-next-line:ordered-imports
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import * as Web3 from 'web3';
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export const web3Factory = {
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create(hasAddresses: boolean = true): Web3 {
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const provider = this.getRpcProvider(hasAddresses);
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const web3 = new Web3();
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web3.setProvider(provider);
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return web3;
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},
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getRpcProvider(hasAddresses: boolean = true): Web3.Provider {
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const provider = new ProviderEngine();
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if (!hasAddresses) {
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provider.addProvider(new EmptyWalletSubprovider());
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}
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provider.addProvider(new FakeGasEstimateSubprovider(constants.GAS_ESTIMATE));
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provider.addProvider(
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new RpcSubprovider({
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rpcUrl: constants.RPC_URL,
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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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