AdminUsers::Operations::SetupTwoFactor code

authenticate.rb

module AdminUsers
  class Authenticate

    extend LightService::Action

    expects :email, :password, :otp_attempt
    promises :admin_user

    executed do |c|
      admin_user = AdminUser.find_by(email: c.email)
      c.admin_user = admin_user

      # this means the user doesn't exist
      c.fail_and_return! "Invalid Email and Password" unless admin_user.present?

      # devise built-in method
      unless admin_user.valid_password?(c.password)
        c.fail_and_return! "Invalid Email and Password"
      end

      if admin_user.otp_required_for_login
        if c.otp_attempt.blank?
          message = [
            "You have 2-factor authentication enabled,",
            "please enter your six-digit code",
          ].join(" ")

          c.fail_and_return! message
        end

        unless validate_otp_attempt(admin_user, c.otp_attempt)
          c.fail_and_return! "Invalid six-digit code"
        end
      end

    end

    def self.validate_otp_attempt(admin_user, code)
      totp = admin_user.otp
      # devise 2FA method
      totp.verify_with_drift(code, admin_user.class.otp_allowed_drift)
    end
    private_class_method :validate_otp_attempt

  end
end

setup_two_factor.rb

# source of SetupTwoFactor as asked by many in this article: https://medium.com/@acesubido/adding-two-factor-authentication-in-activeadmin-2ed134b60042
# Using Trailblazer 2.0

# app/concepts/admin_users/operations/setup_two_factor.rb
module AdminUsers
  module Operations
    class SetupTwoFactor < ApplicationOperation

      step Model(AdminUser, :find)
      step Contract::Build(constant: Contracts::SetupTwoFactor)
      step Contract::Validate(key: :admin_user)
      step Contract::Persist(method: :sync)
      success :set_otp_secret!
      step Contract::Persist(method: :save)

      def set_otp_secret!(options, params:, **)
        if options['model'].otp_required_for_login
          unless options['model'].otp_secret.present?
            options['model'].otp_secret = AdminUser.generate_otp_secret
          end
        end
      end

    end
  end
end

# app/concepts/admin_users/contacts/setup_two_factor.rb
module AdminUsers
  module Contracts
    class SetupTwoFactor < ApplicationContract

      property :otp_required_for_login, type: Types::Form::Bool

    end
  end
end

Hi ace-subido, I am getting issues when trying to use this code with ruby-2.2.7.Can you help me to solve this issue?