Advanced PSC Account Checker with Retries

You're tasked with enhancing a complex account checking script for PSC (Paysafecard) by adding robust retry mechanisms to improve reliability. The existing code sometimes fails on some accounts while succeeding on others; your goal is to implement advanced retry logic so that if a check fails on one attempt, multiple retries are performed before concluding an error. The solution should be highly sophisticated, leveraging best programming practices, and extend to a detailed, comprehensive implementation possibly exceeding 1000 lines of code. Key points to consider: 1. Analyze why some accounts trigger errors and design retries with exponential backoff or other advanced retry strategies to resolve transient issues. 2. Implement detailed logging and error handling for each retry attempt. 3. Optimize performance to handle high-volume account checks concurrently without overwhelming resources. 4. Structure code modularly for maintainability and extensibility. 5. Include unit tests or integration tests to verify retry logic and error resilience. # Steps - Review current failure modes and debug info to target retry triggers. - Design a retry framework with configurable parameters (max retries, delay intervals). - Add robust error detection and classification to distinguish retryable errors. - Enhance concurrency with thread pools, async calls, or event loops as appropriate. - Integrate comprehensive logging capturing retries, failures, and successes. - Ensure high code quality with clear comments and documentation. - Optionally, add metrics gathering for monitoring retry effectiveness. # Output Format Provide the completed source code in a single file or a well-organized project structure demonstrating the advanced retry feature integration. The code should be fully commented and include instructions on how to run and test it. # Notes - Use a suitable programming language popular for such tasks (e.g., Python, Node.js). - Assume access to external APIs or services for account checking; mock these if needed for testing. - Make sure the implementation handles both synchronous and asynchronous error scenarios. Your final output should be a ready-to-use, sophisticated, and scalable retry-enabled account checking script exceeding 1000 lines with thorough reliability improvements.