Lab version of the algorithm for creating a hash to maksutruva's payment gateway, it's madness

maksuturva.rb

#!/usr/bin/env ruby
require 'sinatra'
require 'digest/sha1'

def getShit(keys)
  hashprimer = ""
  keys.each do |k|
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_action"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_version"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_selleriban"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_id"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_orderid"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_reference"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_duedate"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_amount"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_currency"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_okreturn"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_errorreturn"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_cancelreturn"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_delayedpayreturn"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_escrow"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_escrowchangeallowed"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_buyername"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_paymentmethod"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_buyeridentificationcode"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_buyeraddress"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_buyerpostalcode"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_buyercity"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_buyercountry"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_deliveryname"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_deliveryaddress"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_deliverypostalcode"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_deliverycity"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_deliverycountry"
    hashprimer = hashprimer + params[k]+"&" if k=="pmt_sellercosts"
    hashprimer = hashprimer + params[k]+"&" if k=~/pmt_row_name\d/
    hashprimer = hashprimer + params[k]+"&" if k=~/pmt_row_desc\d/
    hashprimer = hashprimer + params[k]+"&" if k=~/pmt_row_quantity\d/
    hashprimer = hashprimer + params[k]+"&" if k=~/pmt_row_deliverydate\d/
    hashprimer = hashprimer + params[k]+"&" if k=~/pmt_row_price_gross\d/
    hashprimer = hashprimer + params[k]+"&" if k=~/pmt_row_price_net\d/
    hashprimer = hashprimer + params[k]+"&" if k=~/pmt_row_vat\d/
    hashprimer = hashprimer + params[k]+"&" if k=~/pmt_row_discountpercentage\d/
    hashprimer = hashprimer + params[k]+"&" if k=~/pmt_row_type\d/
    
  end
  #
  hashprimer = hashprimer + "testiavain&"
  return hashprimer
  return Digest::SHA1.hexdigest hashprimer
end

post '/' do
  getShit(params.keys)
  
end