OpenZeppelin closed new Defender sign-ups on June 30, 2025 and retired the hosted service on July 1, 2026. If your contracts were watched by Defender Monitor, those alerts have stopped. The service is
A contract goes live after an audit. The audit checked the code on one day. From then on, the contract changes owner, gets upgraded, moves money and talks to bots, and somebody has to notice when one
On August 6, 2024 the Ronin team upgraded its bridge on Ethereum. 48 minutes later an MEV bot withdrew about 4,000 ETH from it, and half an hour after that another address took 2M USDC. In total about
