{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the optional information available in smart contracts on the blockchain?","a":"Unchangeable: Based on the characteristics of blockchain technology, the data and execution results  of smart contracts cannot be tampered with, ensuring the fairness of contract execution."}]}],"pr":"7a9f902bde37c25c64d80b15a8b4cc96072c0bd77e4b099260c0b3f07a79845b"}