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Interface

CouldNotRefundExceptionInterface

Magento\Sales\Api\Exception\CouldNotRefundExceptionInterface

What it does

This interface serves as a marker for exceptions that occur when a refund operation cannot be completed in Magento 2.

Developers should implement this interface when creating custom exception classes for refund-related errors, allowing the system to identify and handle refund failures consistently.

It's primarily used in service layer implementations dealing with credit memo and refund processing.