## Bitcoin – Bitcoinjs and Private Keys

September 13, 2018

Author: Michael Gord

# Bitcoinjs and Private Keys

You must have node and npm downloaded on your computer. After this tutorial you should have both a public bitcoin address and private key saved as variables.

`npm install bitcoinjs-lib`

Download bitcoinjs library from your node terminal.

`var bitcoin = require("bitcoinjs-lib")`

Require bitcoinjs-lib.

`var keyPair = bitcoin.ECPair.makeRandom();`

Make variable for keyPair.

`console.log(keyPair.getAddress());`

Test address by logging address to console. A valid bitcoin address should be returned.

`var address = keyPair.getAddress();`

Save bitcoin address result to a variable.

`console.log(keyPair.toWif());`

Test private key by logging to console. A valid bitcoin private key should be returned.

`var pkey = keyPair.toWIF();`

Save bitcoin private key result to a variable.