On Jan-03–2024 UTC+8:00, the Radiant protocol on Arbitrum was under the flashloan attack. The hacker attacked the #Radiant protocol 3 times, resulting in a total loss of 1.9K $ETH(worth $4.5m). The root cause is the mathematical rounding issue in the `burn` function that is amplified and used, on a new $USDC market, which makes the hacker withdraw an extra $USDC. MetaTrust Labs conducted in-depth research and analysis on the exploit, revealing how the hacker exploits vulnerability.