Скачать или смотреть Build a paypal payment system in react node js in 20 minutes

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okay, let's dive into building a basic paypal payment system using react for the frontend and node.js/express for the backend. while it's tough to get a fully production-ready system in 20 minutes, we'll cover the core concepts and get a functional example up and running. we'll focus on the basic integration flow, not all the bells and whistles like error handling and extensive validation (you'll need to add those for a real-world application).

*important considerations before we start:*

*paypal developer account:* you'll need a paypal developer account (sandbox environment) to test your integration. sign up at [https://developer.paypal.com/](https://developer.paypal.com/).
*paypal api credentials:* once you have a developer account, create a "rest api app" in the developer dashboard. this will give you a client id and secret, which you'll need for your backend. use the sandbox environment for testing.
*security:* *never* expose your paypal api credentials in your client-side code (react). they *must* be kept securely on your backend server.

*high-level overview*

the basic flow will be:

1. *frontend (react):*
display a "pay with paypal" button.
on button click, send a request to the backend to create a paypal order.
receive the order id from the backend.
use the paypal javascript sdk to render the paypal payment buttons using the order id.
handle the success/cancel/error callbacks from the paypal sdk.
send a request to the backend to capture (finalize) the payment.

2. *backend (node.js/express):*
create an api endpoint to create a paypal order using the paypal api.
create an api endpoint to capture (finalize) a paypal order using the paypal api.
return success or failure responses to the frontend.

*step-by-step implementation*

*1. project setup*



*2. backend (node.js/express)*

create a file named `paypal-backend/server.js`:



create a `.en ...

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