{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to prevent and repair smart contract vulnerabilities in blockchain?","a":"Security audit: Before deploying a smart contract, developers need to hire professional  security audit teams to review the code, ensuring its reliability and security. By identifying potential vulnerabilities through audits, they can be fixed before deployment."}]}],"pr":"3ac1622603fb8e6600591ff672e94eb710517fc61f3bc77b61708d1689d6fb89"}