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Solution: Create a Pluggable Payment Processor Factory

Solution: Create a Pluggable Payment Processor Factory

Use a vendor-to-factory function map to construct the correct payment processor with the proper credentials.

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Solution explanation

  • Lines 1–26: We define three processor classes: StripeProcessor, PayPalProcessor, and SquareProcessor.

    • Each accepts a different credential parameter in its constructor (apiKey, merchantId, or accessToken).

    • All expose a .charge(amount) method, keeping the interface consistent for consumers.

  • Lines 28–32: We create a processorFactoryMap that maps vendor names ('stripe', 'paypal', 'square') to factory ...