{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do you calculate the cost of a tree in a blockchain?","a":"Data storage cost: The data storage cost in blockchain includes the generation, verification, and storage of  blocks. Each block contains a certain amount of data, such as transaction records, account information, etc. As the blockchain continues to grow, the storage cost will also increase accordingly."}]}],"pr":"db191ed84bac98ce70b8ffd255f1bb8ea5469b8678dec8f409f98ba0553b4b68"}