During June 2025, contributed to the coinbase/x402 repository by designing and implementing the Exact Payment Scheme for the Sui blockchain. This feature introduced flexible payment options and enabled gas-less transactions, reducing user friction and supporting broader adoption of configurable payments. The work focused on protocol design and smart contract development, leveraging blockchain development skills to ensure seamless wallet and merchant integrations. The implementation was anchored by a single, well-documented commit that aligned with the project’s roadmap for gasless payments. Markdown was used for documentation, ensuring clarity and maintainability. No bug fixes were recorded during this period, reflecting focused feature delivery.