Worked on the walt-id/waltid-identity repository to enhance exception handling within the Crypto library, focusing on improving debugging and maintainability. Introduced the ability to attach an optional cause to CryptoExceptions, providing richer context for error analysis and facilitating faster root-cause identification across cryptographic operations. The implementation, delivered through two well-documented commits, demonstrated advanced use of Kotlin and robust software development practices. Emphasized clear error propagation patterns and improved observability, ensuring that future issues can be traced more efficiently. No major bugs were addressed during this period, with efforts concentrated on strengthening exception handling and overall code quality in the Crypto module.