import * as _ from 'lodash'; import { Network } from '../types'; const etherscanPrefix = (networkId: number): string | undefined => { switch (networkId) { case Network.Kovan: return 'kovan.'; case Network.Mainnet: return ''; default: return undefined; } }; export const etherscanUtil = { getEtherScanTxnAddressIfExists: (txHash: string, networkId: number) => { const prefix = etherscanPrefix(networkId); if (_.isUndefined(prefix)) { return; } return `https://${prefix}etherscan.io/tx/${txHash}`; }, };