{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to prevent vulnerabilities in smart contracts in blockchain?","a":"Conduct strict code review and testing of smart contracts to ensure that the contract functions normally and has no  obvious security vulnerabilities."}]}],"pr":"8ba44dc3f2db096ab1d6902345e80497b2bc51b998fe8c584b334685be15cab9"}