Midday key updates on April 21

7:00 (UTC+8)-12:00 (UTC+8) Keywords: Vance, Kelp, Curve1. Vance will travel to Pakistan for Iran talks on Tuesday;2. Kelp: The theft was caused by LayerZero's RPC node being breached;3. Trump has stockpiled $550 million in campaign funds ahead of the US midterm elections;4. Trump: "Midnight's Hammer" has completely wiped out Iran's nuclear dust base;5. The Arbitrum Security Council has frozen 30,766 ETH stolen by the KelpDAO hacker;6. US crypto market structure legislation delayed, Senate Banking Committee unlikely to review in April;7. Curve founder criticizes DeFi security chaos: Many vulnerabilities could have been avoided, calls for industry standards.