What is mt940_parser?

The mt940_parser library is a tool that reads electronic bank account statements and converts them into data a computer program can easily work with. It handles files in a specific international banking format called SWIFT mt940, which many banks use to deliver account statements to their customers. At a high level, the library takes a raw mt940 file as input and translates its structured but specialized banking notation into organized data. Instead of dealing with lines of banking codes and cryptic transaction fields, a developer gets back clean, structured information about account balances, individual transactions, and statement details. The README doesn't go into detail about the specific output format or API, but the core purpose is straightforward: turn a bank's proprietary statement format into something a Ruby application can understand and manipulate. This tool is for developers building financial applications in Ruby who need to import bank statements. For example, if you are building accounting software, a payment reconciliation tool, or a dashboard that shows a company's cash flow, you might receive transaction data from banks in mt940 format. Rather than manually parsing the banking codes yourself, this library handles that conversion so your application can focus on the business logic, like categorizing transactions or matching payments to invoices. The project is relatively old, with a copyright dating back to 2010, and the README is sparse on implementation details. It doesn't describe supported bank variations, error handling, or performance characteristics. The contributing instructions suggest the project follows a standard open-source model where contributors add tests for any changes, but there is little documentation to guide new users through setup or usage.