{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What types of smart contracts are included in blockchain?","a":"Internet of Things (IoT) contracts: This type of smart contract is mainly used  for interaction and control between IoT devices, and can achieve functions such as automatic operation, data exchange, and permission control."}]}],"pr":"d72b4f7a961aa15c782c13341415b99439494febe6eedce7a482669ef897d172"}