{"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":"0fee81c84400aeefd07a52d22fdc8a73dfdf6bfff4bb7f985540c61b37912f49"}