fix bugs

Author: johnloopring

utils/config.ts

@@ -1,10 +1,12 @@
 // TODO: remove once env variables are added to vercel.
 export const LOOPRING_SUBGRAPH =
   process.env.NEXT_PUBLIC_SUBGRAPH_ENDPOINT ??
-  'https://gateway.thegraph.com/api/294a874dfcbae25bcca653a7f56cfb63/subgraphs/id/7QP7oCLbEAjejkp7wSLTD1zbRMSiDydAmALksBB5E6i1';
+  'https://api.thegraph.com/subgraphs/name/loopring/loopring';
 export const EXPLORER_URL = 'https://etherscan.io/';
 export const INFURA_ENDPOINT =
-  process.env.NEXT_PUBLIC_INFURA_ENDPOINT ?? 'https://mainnet.infura.io/v3/873030883ea1405898041be94ab2bfd5';
+  process.env.NEXT_PUBLIC_INFURA_ENDPOINT 
+  ? process.env.NEXT_PUBLIC_INFURA_ENDPOINT
+  : window.location === '' ? 'https://mainnet.infura.io/v3/873030883ea1405898041be94ab2bfd5';
 export const UNISWAP_SUBGRAPH = 'https://api.thegraph.com/subgraphs/name/uniswap/uniswap-v2';
 export const LOOPRING_API = 'https://api3.loopring.io/api/v3/';
 export const apiEndpointByTxType = {