Nacha

Validating Ruby ACH parser and generator

Format documentation here: http://achrulesonline.org/

The definition of the records exactly mirrors the NACHA documentation so that development and business can use the same terminology.

Work in progress - contributors welcome.

Installation

Add this line to your application's Gemfile:

gem 'nacha'

And then execute:

$ bundle

Or install it yourself as:

$ gem install nacha

Usage

API may change at any time. Pull requests welcomed

    ach_string = "101 124000054 1240000540907021214A094101ZIONS FIRST NATIONAL BAZIONS FIRST NATIONAL BA       1"
    ach_records = Nacha::Parser.parse_string(ach_string)
    ach_records[0].class  # => Nacha::Record::FileHeaderRecord

    ach_records[0].to_json

{
  "record_type_code": "1",
  "priority_code": 1,
  "immediate_destination": "124000054",
  "immediate_origin": "124000054",
  "file_creation_date": "2009-07-02",
  "file_creation_time": "1214",
  "file_id_modifier": "A",
  "record_size": "094",
  "blocking_factor": "10",
  "format_code": "1",
  "immediate_destination_name": "ZIONS FIRST NATIONAL BA",
  "immediate_origin_name": "ZIONS FIRST NATIONAL BA",
  "reference_code": "       1"
}

Parse an ach file into an HTML file

nacha parse ach_file.ach > ach_file.html`

Discussion

• Nacha::Record::Base defines a class method nacha_field
• Each ACH record class defines its fields using nacha_field
• Based on the information provided by nacha_field a regex matcher for different record types can be built out of the constant parts of the ACH record.
• Each ACH record has a "RecordType" mixin that specifies the record types that can follow this record.

Parsing starts by looking for a default record type 'Nacha::Record::FileHeader' When that is found, the valid child record types for 'Nacha::Record::FileHeader' are gathered and the subsequent lines are parsed using only those types

When a record is created, the fields for the instance are created from the field definitions.

Development

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.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/dwilkins/nacha.

License

The gem is available as open source under the terms of the MIT License.