{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How is the JavaScript tracking feature of blockchain implemented?","a":"Design smart contract: First, design a smart contract that meets specific business logic requirements. A smart contract is a piece of code on the blockchain that can handle transactions, monitor  data, and provide secure interfaces for external calls."}]}],"pr":"a56f3d088e27f9551e47ed4e99a36045adde7427ef3391fdac1e9ad2a484cfc3"}