In January 2025, John Underwood developed a wallet import feature for the BlueWallet/BlueWallet repository, enabling users to import and create wallets from mini private keys by converting them to the standard WIF format. He focused on cryptographic key encoding and secure handling, ensuring compatibility with legacy formats such as Casascius and Satori minikeys. Using JavaScript and TypeScript, John implemented comprehensive integration tests to validate the minikey import workflow, enhancing regression coverage and reliability. His work expanded onboarding and asset recovery options, improving interoperability for users with older assets and demonstrating depth in cryptography, integration testing, and wallet development.