Grokking Node.js Design Patterns for Interviews/

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Create a Pluggable Payment Processor Factory

Create a Pluggable Payment Processor Factory

Build a factory that selects a payment processor based on vendor config, using constructor arguments and a strategy map.

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Problem statement

You’re integrating with multiple payment vendors. Each vendor (Stripe, PayPal, or Square) requires a different class and some initialization parameters:

  • Stripe uses an apiKey ...