{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"In a blockchain, who decides the updating permissions of smart contracts?","a":"In a blockchain, the updating permissions of smart contracts are determined by the creators and owners of the contracts. These permissions can be managed through predefined rules  and conditions to ensure that smart contracts can only be updated under specific conditions. This permission management mechanism can prevent unauthorized access and tampering, thereby ensuring the security and stability of the blockchain network. Meanwhile, the updating permissions of smart contracts can also be adjusted as needed to accommodate different business scenarios and requirements."}]}],"pr":"9da402b7d74cef32041704d53507ee9b943e0a39235378337ad9ed22abf24cfc"}