Signs a request in ruby

buda_request.rb

require "base64"
require "digest"
require "net/http"
require "uri"
require "JSON"

PRIVATE = ARGV[1]
PUBLIC = ARGV[2]
def gen_nonce
  # Sleeps 200ms to avoid flooding the server with requests.
  sleep(0.2)
  Time.now.to_i.to_s
end

def get_headers_for(method, path = nil, payload = nil)
  nonce = gen_nonce
  str = "#{method} #{path} "
  str += Base64.strict_encode64(payload.to_json) + ' ' if payload
  str += nonce
  puts "signing #{str}"
  signature = Digest::HMAC.hexdigest(str, PRIVATE, Digest::SHA384)
  {
    'X-SBTC-APIKEY': PUBLIC,
    'X-SBTC-NONCE': nonce,
    'X-SBTC-SIGNATURE': signature,
    'Content-Type': 'application/json'
  }
end
path = ARGV[0]
payload = {
  type: 'bid',
  price_type: 'limit',
  limit: '20000',
  amount: '0.00001'
}
headers = get_headers_for("POST", path, payload)

uri = URI.parse("https://www.buda.com#{path}")

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true
request = Net::HTTP::Post.new(uri.request_uri)
request.body = payload.to_json
headers.each do |key, value|
  request.add_field(key, value)
end
response = http.request(request)
puts response.code
puts response
puts response.body