Node Etherumjs wallet samples

```javascript
# createWallet.js
const Wallet = require('ethereumjs-wallet')

const wallet = Wallet.generate();
console.log('0x'+wallet.getAddress().toString('hex'));
console.log(wallet.getPublicKey().toString('hex'));
console.log(wallet.getPrivateKey().toString('hex'));
```

```javascript
# importWallet.js
const Wallet = require('ethereumjs-wallet')

const privateKey = process.env.YOUR_PRIVATE_KEY;
const wallet = Wallet.fromPrivateKey(Buffer.from(privateKey, 'hex'));
console.log('0x'+wallet.getAddress().toString('hex'));
```

```javascript
# createHD.js
const bip39 = require("bip39");

const mnemonic = bip39.generateMnemonic(); //generates string
const seed = bip39.mnemonicToSeed(mnemonic); //creates seed buffer
console.log(mnemonic.toString());
```

```javascript
# importHD.js
const hdkey = require('ethereumjs-wallet/hdkey')
const bip39 = require("bip39");

const mnemonic = process.env.MNEMONIC_SEED
const path = "m/44'/60'/0'/0/0";

const hdWallet = hdkey.fromMasterSeed(bip39.mnemonicToSeed(mnemonic));
for(let i = 0; i < 10; i++) {
  const wallet = hdWallet.derivePath(`m/44'/60'/0'/0/${i}`).getWallet();
  const address = wallet.getAddress();
  console.log('0x' + address.toString('hex'));
  console.log(wallet.getPrivateKey().toString('hex'));
}
```