Kakunin

Kakunin is a minimalistic tool to prompt users for confirmation. It currently does so by requesting users to solve an easy mathematical problem (a simple addition). In the future, other forms may be added.

This may look similar to captcha solutions. But, Kakunin's aim is not to determine whether users are human or not, but rather to prevent users from performing a dangerous action (e.g., deleting files or destroying a cloud infrastructure).

Add this line to your application's Gemfile:

gem 'kakunin'

And then execute:

$ bundle

Or install it yourself as:

$ gem install kakunin

Usage example:

require 'kakunin'

begin
  Kakunin::Math.new.ask
  # some potentially dangerous code that requires confirmation
rescue StandardError => e
  puts "ERROR: #{e}"
end

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/betabandido/kakunin. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.