Solana perpetual DEX Drift Protocol experienced the largest DeFi hack of the year on April Fool's day, losing $280M in user funds, with investigations ongoing but fund recovery seeming unlikely. In other DeFi news, after two years of development, crypto lender Aave unveiled its fourth iteration of its DeFi protocol, now live on Ethereum. The week also saw significant shutdowns, with Leap Wallet, a popular Cosmos ecosystem hot wallet, announcing closure and advising users to migrate wallets by May 28, 2026. On the expansion front, a mobile version of popular perpetual DEX Hyperliquid is now available to Android users, though functionality and downloads remain limited as the app is in early stages.