{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the application scenarios of smart contracts in blockchain?","a":"Digital identity authentication: Smart contracts can be used to build decentralized identity authentication systems, ensuring the security and privacy of user information."}]}],"pr":"432230ad1b761b206d3018dcac2cc33a1f2d7279457fafc30df1284088a8d6db"}