{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the security risks that blockchain upgrades may pose?","a":"Denial of service attacks: During the upgrade, the blockchain network may face denial of  service attacks (DDoS), affecting normal operation."}]}],"pr":"999ebe13a28a5927128bf9c16df06a8aa98035bbf5ec9a630dda3ca504a3a5bd"}