{"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":"Regular updates and maintenance: Periodically update and maintain smart contracts  to address newly discovered vulnerabilities and ensure continued security."}]}],"pr":"3ae61cab07eb7d077fa74124f5ef0040f118f61ad76f18bce5af9f47966f384b"}