{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the roles of consensus mechanisms in blockchain?","a":"Ensure  data consistency: The consensus mechanism achieves consistency of data and transactions on the blockchain by reaching agreement among all nodes in the network, preventing double spending and other malicious behaviors, and ensuring data consistency on the blockchain."}]}],"pr":"eab06c438ac0c7f167bdacf176d7f64adffbe7df708672f7d70a8bc35ad717da"}