Swedish bank tools

Ruby gem to validate, normalize/prettify and to some extent interpret

• Swedish bank account numbers
• Swedish plusgiro numbers
• Swedish bankgiro numbers

This gem does what it can to weed out invalid numbers but errs on the side of allowing too much, in the absence of good specifications, so be advised that a "valid" number might still be incorrect.

Inspired by iulianu/iban-tools. Please consider contributing gems for your country.

Installation

With Bundler for e.g. Ruby on Rails, add this to your Gemfile:

gem 'banktools-se', :git => 'git://github.com/barsoom/banktools-se.git'

and run

bundle

to install it.

Usage

# Bankgiro

valid_account = BankTools::SE::Bankgiro.new(" 5402968 1 ")
valid_account.valid?  # => true
valid_account.errors  # => []
valid_account.normalize  # => "5402-9681"

bad_account = BankTools::SE::Bankgiro.new(" 1X ")
bad_account.valid?  # => false
bad_account.errors  # => [ :too_short, :invalid_characters, :bad_checksum ]
bad_account.normalize  # => " 1 "

# 90-konto
fundraising_account = BankTools::SE::Bankgiro.new("902-0033")
fundraising_account.fundraising?  # => true


# Plusgiro

valid_account = BankTools::SE::Plusgiro.new("2865434")
valid_account.valid?  # => true
valid_account.errors  # => []
valid_account.normalize  # => "28 65 53-4"

bad_account = BankTools::SE::Plusgiro.new(" 1X ")
bad_account.valid?  # => false
bad_account.errors  # => [ :too_short, :invalid_characters, :bad_checksum ]
bad_account.normalize  # => " 1 "

# 90-konto
fundraising_account = BankTools::SE::Plusgiro.new("90 20 03-3")
fundraising_account.fundraising?  # => true


# Bank account

valid_account = BankTools::SE::Account.new("11000000000")
valid_account.valid?  # => true
valid_account.errors  # => []
valid_account.normalize  # => "1100-0000000"
valid_account.bank  # => "Nordea"
valid_account.clearing_number  # => "1100"
valid_account.serial_number  # => "0000000"

bad_account = BankTools::SE::Account.new(" 0000-0000000X ")
bad_account.valid?  # => false
bad_account.errors  # => [ :invalid_characters, :unknown_clearing_number ]
bad_account.bank  # => nil
bad_account.normalize  # => " 0000-0000000X "


# Error codes

BankTools::SE::Errors::TOO_SHORT                # => :too_short
BankTools::SE::Errors::TOO_LONG                 # => :too_long
BankTools::SE::Errors::INVALID_CHARACTERS       # => :invalid_characters
BankTools::SE::Errors::BAD_CHECKSUM             # => :bad_checksum
BankTools::SE::Errors::UNKNOWN_CLEARING_NUMBER  # => :unknown_clearing_number

TODO

Possible improvements to make:

• Handle Sparbanken zerofill.
• Luhn validation based on BGC docs.

Credits and license

By Henrik Nyh for Barsoom under the MIT license:

Copyright (c) 2011 Barsoom AB

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.