{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain implement the revocation and shutdown of programs?","a":"Consensus algorithm: Nodes in the blockchain network need to reach consensus to confirm transactions and execute smart contracts."}]}],"pr":"b9dca7ef724f06d6564bd665556242527a59f260ac8ecf51b02ab9aaf6875cbe"}