class XSignature::RedisNonceValidator

Attributes

keys_prefix[RW]
redis_connection[RW]

Public Class Methods

new(redis_connection: nil, keys_prefix: 'XSignature:LastNonce:') click to toggle source
# File lib/x-signature/redis_nonce_validator.rb, line 8
def initialize(redis_connection: nil, keys_prefix: 'XSignature:LastNonce:')
  @redis_connection = redis_connection || Redis.current
  @keys_prefix      = keys_prefix
end

Public Instance Methods

valid?(data) click to toggle source
# File lib/x-signature/redis_nonce_validator.rb, line 13
def valid?(data)
  key = "#{keys_prefix}#{data.client}"
  loop do
    redis_connection.watch key do
      last_nonce = redis_connection.get(key).to_i
      if last_nonce < data.nonce
        result = redis_connection.multi do |multi|
          multi.set key, data.nonce
        end
        return true if result[0] == 'OK'
      else
        redis_connection.unwatch
        return false
      end
    end
  end
end