{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are some common security vulnerabilities in smart contracts on the blockchain?","a":"Permission issues: The permission management in  smart contracts may lead to unauthorized data access. Attackers can obtain unauthorized data or permissions through vulnerabilities and then carry out attacks."}]}],"pr":"8c14851a872e42cfd616bcd0694b4d37363bfff5965e50efd4d70b3054740a73"}