{"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":"52c8cfd9ecafde023ac9183088eec754209c18c633d88b0c669c030ea409df66"}