import { ZeroEx } from '0x.js'; import { BigNumber } from '@0xproject/utils'; import * as _ from 'lodash'; import { configs } from './configs'; import { errorReporter } from './error_reporter'; import { RequestQueue } from './request_queue'; import { utils } from './utils'; // HACK: web3 leaks XMLHttpRequest into the global scope and causes requests to hang // because they are using the wrong XHR package. // Filed issue: https://github.com/ethereum/web3.js/issues/844 // tslint:disable-next-line:ordered-imports import * as Web3 from 'web3'; const DISPENSE_AMOUNT_ZRX = new BigNumber(0.1); const QUEUE_INTERVAL_MS = 5000; export class ZRXRequestQueue extends RequestQueue { private _zeroEx: ZeroEx; constructor(web3: Web3, networkId: number) { super(web3); this.queueIntervalMs = QUEUE_INTERVAL_MS; const zeroExConfig = { networkId, }; this._zeroEx = new ZeroEx(web3.currentProvider, zeroExConfig); } protected async processNextRequestFireAndForgetAsync(recipientAddress: string) { utils.consoleLog(`Processing ZRX ${recipientAddress}`); const baseUnitAmount = ZeroEx.toBaseUnitAmount(DISPENSE_AMOUNT_ZRX, 18); try { const zrxTokenAddress = this._zeroEx.exchange.getZRXTokenAddress(); const txHash = await this._zeroEx.token.transferAsync( zrxTokenAddress, configs.DISPENSER_ADDRESS, recipientAddress, baseUnitAmount, ); utils.consoleLog(`Sent ${DISPENSE_AMOUNT_ZRX} ZRX to ${recipientAddress} tx: ${txHash}`); } catch (err) { utils.consoleLog(`Unexpected err: ${err} - ${JSON.stringify(err)}`); await errorReporter.reportAsync(err); } } }