{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the roles of nodes in a blockchain network?","a":"Data Storage: Nodes are responsible for storing transaction data  and block information on the blockchain, ensuring the integrity and security of the data."}]}],"pr":"03680e383caade1afbb715fd58491ef08daa091e74af0fa7a545cb93e7b13eb6"}