chore: Fix alternative RPC url bug (pancakeswap#2415)

Author: RabbitDoge

.env.development

@@ -10,9 +10,6 @@ REACT_APP_NODE_2 = "https://bsc-dataseed1.defibit.io"
 # 10+ nodes balanced in each region, global
 REACT_APP_NODE_3 = "https://bsc-dataseed.binance.org"
 
-# Google Cloud Infrastructure Endpoint - Global
-REACT_APP_NODE_4 = "https://nodes.pancakeswap.com/"
-
 REACT_APP_GRAPH_API_PROFILE = "https://api.thegraph.com/subgraphs/name/pancakeswap/profile"
 REACT_APP_GRAPH_API_PREDICTION = "https://api.thegraph.com/subgraphs/name/pancakeswap/prediction-v2"
 REACT_APP_GRAPH_API_LOTTERY = "https://api.thegraph.com/subgraphs/name/pancakeswap/lottery"

.env.production

@@ -11,7 +11,7 @@ REACT_APP_NODE_2 = "https://bsc-dataseed1.defibit.io"
 REACT_APP_NODE_3 = "https://bsc-dataseed.binance.org"
 
 # Google Cloud Infrastructure Endpoint - Global
-# REACT_APP_NODE_4 = "https://nodes.pancakeswap.com/"
+# REACT_APP_NODE_ALT = "https://nodes.pancakeswap.com/"
 
 REACT_APP_GRAPH_API_PROFILE = "https://api.thegraph.com/subgraphs/name/pancakeswap/profile"
 REACT_APP_GRAPH_API_PREDICTION = "https://api.thegraph.com/subgraphs/name/pancakeswap/prediction-v2"

.env.test

@@ -3,4 +3,3 @@ REACT_APP_CHAIN_ID = "56"
 REACT_APP_NODE_1 = "https://bsc-dataseed1.ninicoin.io"
 REACT_APP_NODE_2 = "https://bsc-dataseed1.ninicoin.io"
 REACT_APP_NODE_3 = "https://bsc-dataseed1.ninicoin.io"
-REACT_APP_NODE_4 = "https://bsc-dataseed1.ninicoin.io"

public/index.html

@@ -6,7 +6,6 @@
     <link rel="preconnect" href="%REACT_APP_NODE_1%" />
     <link rel="preconnect" href="%REACT_APP_NODE_2%" />
     <link rel="preconnect" href="%REACT_APP_NODE_3%" />
-    <!-- <link rel="preconnect" href="%REACT_APP_NODE_4%" /> REMOVED UNTIL GOOGLE NODE IS FIXED -->
     <link rel="preconnect" href="https://fonts.gstatic.com" />
     <link href="https://fonts.googleapis.com/css2?family=Kanit:wght@400;600&display=swap" rel="stylesheet" />
     <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico" />

src/utils/getRpcUrl.ts

@@ -1,15 +1,14 @@
 import sample from 'lodash/sample'
 
+if (!process.env.REACT_APP_NODE_1 || !process.env.REACT_APP_NODE_2 || !process.env.REACT_APP_NODE_3) {
+  throw Error('One base RPC URL is undefined')
+}
+
 // Array of available nodes to connect to
-export const nodes = [
-  process.env.REACT_APP_NODE_1,
-  process.env.REACT_APP_NODE_2,
-  process.env.REACT_APP_NODE_3,
-  // process.env.REACT_APP_NODE_4,
-]
+export const nodes = [process.env.REACT_APP_NODE_1, process.env.REACT_APP_NODE_2, process.env.REACT_APP_NODE_3]
 
-if (process.env.NODE_ENV === 'production') {
-  nodes.push(process.env.REACT_APP_NODE_4)
+if (process.env.NODE_ENV === 'production' && process.env.REACT_APP_NODE_ALT) {
+  nodes.push(process.env.REACT_APP_NODE_ALT)
 }
 
 const getNodeUrl = () => {