Switch to serum api endpoint

src/components/DebugButtons.js

@@ -5,9 +5,9 @@ import {
 } from '../utils/wallet';
 import { useUpdateTokenName } from '../utils/tokens/names';
 import { useCallAsync, useSendTransaction } from '../utils/notifications';
-import { Account, clusterApiUrl, LAMPORTS_PER_SOL } from '@solana/web3.js';
+import { Account, LAMPORTS_PER_SOL } from '@solana/web3.js';
 import { abbreviateAddress, sleep } from '../utils/utils';
-import { refreshAccountInfo, useConnectionConfig } from '../utils/connection';
+import { refreshAccountInfo, useConnectionConfig, MAINNET_URL } from '../utils/connection';
 import { createAndInitializeMint } from '../utils/tokens';
 import { Tooltip, Button } from '@material-ui/core';
 import React from 'react';
@@ -60,7 +60,7 @@ export default function DebugButtons() {
   }
 
   const noSol = amount === 0;
-  const requestAirdropDisabled = endpoint === clusterApiUrl('mainnet-beta');
+  const requestAirdropDisabled = endpoint === MAINNET_URL;
   return (
     <div style={{ display: 'flex' }}>
       <Tooltip

src/components/NavigationFrame.js

@@ -3,7 +3,7 @@ import Toolbar from '@material-ui/core/Toolbar';
 import AppBar from '@material-ui/core/AppBar';
 import Typography from '@material-ui/core/Typography';
 import { makeStyles } from '@material-ui/core/styles';
-import { useConnectionConfig } from '../utils/connection';
+import { useConnectionConfig, MAINNET_URL } from '../utils/connection';
 import Button from '@material-ui/core/Button';
 import Menu from '@material-ui/core/Menu';
 import MenuItem from '@material-ui/core/MenuItem';
@@ -87,14 +87,14 @@ function NetworkSelector() {
   const classes = useStyles();
 
   const networks = [
-    clusterApiUrl('mainnet-beta'),
+    MAINNET_URL,
     clusterApiUrl('devnet'),
     clusterApiUrl('testnet'),
     'http://localhost:8899',
   ];
 
   const networkLabels = {
-    [clusterApiUrl('mainnet-beta')]: 'Mainnet Beta',
+    [MAINNET_URL]: 'Mainnet Beta',
     [clusterApiUrl('devnet')]: 'Devnet',
     [clusterApiUrl('testnet')]: 'Testnet',
   };

src/utils/connection.js

@@ -6,10 +6,11 @@ import tuple from 'immutable-tuple';
 
 const ConnectionContext = React.createContext(null);
 
+export const MAINNET_URL = 'https://solana-api.projectserum.com';
 export function ConnectionProvider({ children }) {
   const [endpoint, setEndpoint] = useLocalStorageState(
     'endpoint',
-    clusterApiUrl('mainnet-beta'),
+    MAINNET_URL,
   );
 
   const connection = useMemo(() => new Connection(endpoint, 'recent'), [
@@ -34,7 +35,7 @@ export function useConnectionConfig() {
 
 export function useIsProdNetwork() {
   const endpoint = useContext(ConnectionContext).endpoint;
-  return endpoint === clusterApiUrl('mainnet-beta');
+  return endpoint === MAINNET_URL;
 }
 
 export function useSolanaExplorerUrlSuffix() {

src/utils/tokens/names.js

@@ -1,11 +1,10 @@
 import EventEmitter from 'events';
-import { useConnectionConfig } from '../connection';
+import { useConnectionConfig, MAINNET_URL } from '../connection';
 import { useListener } from '../utils';
 import { useCallback } from 'react';
-import { clusterApiUrl } from '@solana/web3.js';
 
 export const TOKENS = {
-  [clusterApiUrl('mainnet-beta')]: [
+  [MAINNET_URL]: [
     {
       mintAddress: 'SRMuApVNdxXokk5GT7XD5cUUgXMBCoAz2LHeuAoKWRt',
       tokenName: 'Serum',