gitcoin.rb

require "hurley"
require "json"
require "digest"

def fetch_info
  JSON.parse(Hurley.get("http://git-coin.herokuapp.com/target").body)
end

def mine_coin
  info = fetch_info
  target = info["target"].hex
  parent_hash = info["parent_hash"]
  (0..1000000).find do |nonce|
    Digest::SHA1.hexdigest(parent_hash + nonce.to_s).hex < target
  end
end