Worked on the lidofinance/ethereum-staking-widget repository to enhance both safety and user experience for Ethereum staking, particularly focusing on Layer 2 user flows and integration with Ledger Live. Leveraged React, React Hooks, and TypeScript to implement an L2 wrap form that defaults to stETH on L2 networks, while introducing stronger type-safety in CowSwap validation utilities through a contract map type and invariant checks for ETH addresses. Added environment-aware protections to disable DEX withdrawals within Ledger Live, reducing the risk of unintended transfers. These updates improved security, reduced user errors, and established a foundation for more robust cross-wallet flows.