Integration of LiqPay payment system for WIX website

Project description:
A complete online payment cycle has been implemented through the LiqPay.ua payment system with the ability to process orders, track transactions, and a user-friendly administrative panel for managing payments.

Main features:
Order creation
Integration into native WIX logic.

Payment via LiqPay
Generation of a payment session has been implemented with automatic transmission of parameters (amount, description, callback URL, user ID, etc.) in data + signature format.

Monitoring transaction success
A webhook handler has been created to receive POST requests from LiqPay, verify signatures, decrypt data, and update order status.

Administrative panel
An administrator interface has been developed for:

Entering/editing LiqPay keys (public/private key)

Viewing the list of orders and their statuses

Force manual status updates if necessary