Optimism saves users $1B in fees, raises $150M in Series B vào tháng 3 17, 2022 blockchain decrease fees defi ethereum blockchain ethereum network expect optimism funding round layer2 optimism expanded optimism network optimism team optimism works scalability solution +
iOS jailbreak dev wins $2M bounty for finding critical Optimism bug vào tháng 2 10, 2022 blockchain bug bounties create eth critical bug defi efforts freeman eth balance ethereum blockchain ethereum network freeman explained hackers hacks layer2 optimism network optimism team +