{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the role of nodes in a blockchain?","a":"Consensus mechanism: Nodes participate in the consensus mechanism of the blockchain network, jointly verifying transactions and maintaining the security  and stability of the blockchain."}]}],"pr":"621d638fb6f80a4d1f928b8003161f362688ca45394a3c1555fdde6b151f2e52"}