class Faker::Blockchain::Aeternity

def rand_strings(length = 50)
  hex_alphabet = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
  var = +''
  length.times { var << sample(shuffle(hex_alphabet.split(''))) }
  var
end