概要
This skill empowers developers to architect and implement robust PayPal payment solutions within their applications. It provides comprehensive guidance on integrating the PayPal JavaScript SDK for client-side checkout and utilizing the REST API for server-side order capture and verification. From setting up simple one-time transactions to managing complex recurring billing cycles and handling asynchronous webhooks through Instant Payment Notifications (IPN), this skill ensures your e-commerce implementation follows industry best practices for security, error handling, and testing.