{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to prevent vulnerabilities in smart contracts in blockchain?","a":"Strictly follow programming specifications when  writing smart contracts, avoid using unsafe programming languages and functions, and ensure code quality."}]}],"pr":"ea3082d6ea95f24054062db39715b5b1ac8173dba5b660717f9a8bdaeca2b205"}