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nakov / secp256k1-example.js
Last active April 9, 2024 16:32
ECDSA in JavaScript: secp256k1-based sign / verify / recoverPubKey
let elliptic = require('elliptic');
let sha3 = require('js-sha3');
let ec = new elliptic.ec('secp256k1');
// let keyPair = ec.genKeyPair();
let keyPair = ec.keyFromPrivate("97ddae0f3a25b92268175400149d65d6887b9cefaf28ea2c078e05cdc15a3c0a");
let privKey = keyPair.getPrivate("hex");
let pubKey = keyPair.getPublic();
console.log(`Private key: ${privKey}`);
console.log("Public key :", pubKey.encode("hex").substr(2));

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@Sjors
Sjors / bitcoin-pay.rb
Last active April 9, 2024 16:50
This script demonstrates how a bitcoin transaction is created and signed. Just pass in your own address and private key and it will prepare a transaction for you. You can then copy & paste that transaction into a webservice like Blockchain to send it. I wrote this mostly to understand better how it works. I sometimes had to "cheat" and look at t…
#!/usr/bin/env ruby
require 'open-uri'
require 'JSON'
require 'digest/sha2'
require 'pry'
require 'bigdecimal'
require 'bitcoin' # Because I need to cheat every now and then
# Usage:
# gem install pry json ffi ruby-bitcoin