Trezor script to generate the private keys from seed.

index.js

const hdkey = require('hdkey')
const bip39 = require('bip39')
const ethUtil = require('ethereumjs-util')
const BigNumber = require('bignumber.js');
require('dotenv').config()
function hdwallet(){
    let mnemonic , seed;
    if (! process.env.MNEMONIC) {
        mnemonic = bip39.generateMnemonic(); //generates string
    } else {
        mnemonic = process.env.MNEMONIC;
    }


    seed = bip39.mnemonicToSeedSync(mnemonic, process.env.PASSWORD).toString('hex');
    const root = hdkey.fromMasterSeed(seed);
    const addrNode = root.derive("m/44'/60'/0'/0/0"+ind); //line 1
    const pubKey = ethUtil.privateToPublic(addrNode._privateKey);
    const addr = ethUtil.publicToAddress(pubKey);
    let address = ethUtil.toChecksumAddress('0x'+addr.toString('hex'));
    console.log("priv key: ", addrNode._privateKey.toString('hex'))
    // console.log("pub: ", '0x'+pubKey.toString('hex'))
    address =  address.toString('hex')
    console.log("address : ", address)
    return address
}
hdwallet()

package.json

{
  "name": "temp",
  "version": "1.0.0",
  "description": "",
  "main": "ethwallet.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
 
    "big-number": "^2.0.0",
    "bip39": "^3.0.2",
    "dotenv": "^8.2.0",
    "ethereumjs-util": "^7.0.2",
    "hdkey": "^2.0.1",
    "keythereum": "^1.0.4",
  }
}