{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to prevent vulnerabilities in smart contracts in blockchain?","a":"Prevent arithmetic overflow vulnerabilities, such as ensuring that values do not exceed expected ranges  during calculation processes."}]}],"pr":"d98522ba93b9fe048a918d3c51fe8caaf7ec1e6c23995049ade61e8d003a4938"}