1. const HDWalletProvider = require('@truffle/hdwallet-provider');
2. const privateKeys = process.env.PRIVATE_KEYS || ""
3. module.exports = {
4.   networks: {
5.     development: {
6.       host: "127.0.0.1",
7.       port: 7545,
8.       network_id: "*"
9.     },
10.     binancetestnet: {
11.       provider: function() {
12.         return new HDWalletProvider(
13.           privateKeys.split(','), // Array of account private keys
14.           `https://data-seed-prebsc-1-s1.binance.org:8545/${process.env.INFURA_API_KEY}`// Url to an Ethereum Node
15.         )
16.       },
17.       gas: 5000000,
18.       gasPrice: 25000000000,
19.       network_id: 97
20.     }
21.   },
22.  
23.   // Set default mocha options here, use special reporters etc.
24.   mocha: {
25.     // timeout: 100000
26.   },
27.  
28.   // Configure your compilers
29.   compilers: {
30.     solc: {
31.        version: "0.7.3",    // Fetch exact version from solc-bin (default: truffle's version)
32.       // docker: true,        // Use "0.5.1" you've installed locally with docker (default: false)
33.       // settings: {          // See the solidity docs for advice about optimization and evmVersion
34.       //  optimizer: {
35.       //    enabled: false,
36.       //    runs: 200
37.       //  },
38.       //  evmVersion: "byzantium"
39.       // }
40.     }
41.   }
42. };
43.