{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can the security and availability of nodes be ensured in a blockchain network?","a":"Monitor log activities: Enable log recording and regularly monitor to discover abnormal  behaviors and potential signs of attacks in a timely manner."}]}],"pr":"2f1db3c4615d680e8f9425451f4c3ed55e8fc19c1d593f77db49439079511ff3"}