Development of a plugin for WooCommerce

RozetkaPay — an international payment service that is part of the EVO+Rozetka group of companies. Created based on the most well-known marketplaces in the country, it provides convenient, fast, and reliable payment solutions both online and offline (including through cash registers at online retail pickup points). We strive to make the purchasing process as simple and secure as possible. 

1. Develop a plugin for WooCommerce:

   • Compatibility with the latest versions of WordPress and WooCommerce.

   • Admin panel for settings.

   • Integration of RozetkaPay API methods.

2. Functional requirements for plugins
   Ability to make payment for an order through Express Checkout, flow:

   1. The user forms a cart with products.
   2. The user proceeds to the payment process.
   3. The payment scenario through Express Checkout must be implemented:
      • The user clicks the ''Buy with RozetkaPay'' button.
      • The endpoint create payment is called:
      • The response to the endpoint call returns a link for Express Checkout.
      • The user is automatically redirected to the received link to complete the payment.
      • After completing the payment, the user will be redirected to the URL specified in the request to create payment.
   4. Ability to receive callback in the merchant's admin panel with the result of payment/refund/cancellation of the order:
   5. Ability to call the resend callback method from the merchant's admin panel to resend the callback:
   6. Ability to call the payment info method from the merchant's admin panel to obtain payment information:
   7. Ability to call the cancel payment method from the merchant's admin panel.
      1. The method is applied in two cases:
         • Order cancellation:
           • Available for unpaid orders.
           • In the cancel payment request, the amount parameter must be empty.
         • Refund:
           • Available for paid orders.
           • For a full refund, the amount parameter should also be left empty.
           • For a partial refund, the value of the amount parameter needs to be specified.
   8. The plugin must support the input of API keys (api_key, secret_key). The keys will be used for authorizing API requests.

3.  Non-functional requirements for plugins

   1. The code must comply with WooCommerce standards.
   2. Use of PHP version 7.4 or newer.
   3. Simple installation (archive with README).
   4. Compatibility with popular browsers.
   5. Requirements for the admin panel settings:
      1. Input of RozetkaPay API keys (api_key, secret_key).
      2. Toggle between sandbox/production mode.
      3. Logging of API requests and responses.
   6. Client interface:
      1. The ''Buy with RozetkaPay'' button for payment through Express Checkout on the checkout page.
         
         5. Testing

      2. Set up a test online store on OpenCart and WooCommerce platforms.

      3. Ensure the ability to install the plugin.

      4. Test the flow.

4. Expected results

   1. Plugins.
      1. Plugin for WooCommerce.
   2. Documentation:
      1. Installation and setup instructions.
   3. Source code:
      1. Comments according to PHP standards.