Security Identifiers

Security identifiers validation library for Ruby.

Currently supports

• ISIN
• CUSIP
• SEDOL

Validates:

• Format
• Check Digit

Installation

Add this line to your application's Gemfile:

gem 'security_identifiers'

And then execute:

$ bundle

Or install it yourself as:

$ gem install security_identifiers

Usage

To validate an ISIN

isin = SecurityIdentifiers::ISIN.new('US0378331005')
isin.valid? # => true

or with an invalid identifier

isin = SecurityIdentifiers::ISIN.new('S0378331005') # => raises SecurityIdentifiers::InvalidFormat

Now you can validate

isin.valid? # => true

The same method applies to CUSIPs and SEDOLs.

CUSIPs and SEDOLs also support converting these identifiers to ISINs.

cusip = SecurityIdentifiers::CUSIP.new('125509BG3')
cusip.to_isin('US') # => SecurityIdentifiers::ISIN

ActiveModel Validations

Includes custom validators for use in ActiveModel/ActiveRecord

class Security
  include ActiveModel::Validations
  include SecurityIdentifiers::Validations

  attr_accessor :cusip, :isin, :sedol

  def initialize(options = {})
    @cusip = options[:cusip]
    @isin  = options[:isin]
    @sedol = options[:sedol]
  end

  validates :cusip, cusip: true, allow_blank: true
  validates :isin,  isin:  true, allow_blank: true
  validates :sedol, sedol: true, allow_blank: true
end

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request