Xojo-Credit-Card-Validator

This simple Xojo application allows users to validate various types of financial identifiers commonly used around the world. It is designed as a learning tool and utility app to demonstrate basic number validation logic using Xojo’s object-oriented programming capabilities.

✅ Supported Validations

• Credit Card Numbers
  Supports major card providers such as:

  • Visa
  • Mastercard
  • American Express...
    Validation is based on the Luhn algorithm.

• IBAN (International Bank Account Number)
  Checks the structure and checksum according to international IBAN rules.

• U.S. Bank Account Numbers
  Performs structural validation for U.S. routing and account numbers.

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🧱 Project Structure

The project is composed of three reusable classes:

• CreditCardValidator
  Detects the card type and verifies number validity.

• IBANValidator
  Verifies IBAN structure and checksum.

• USBankAccountValidator
  Validates U.S. account and routing numbers format.