{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can the communication overhead be reduced in a blockchain system with multiple shards?","a":"Design an efficient communication protocol, such as a communication mechanism based on Gossip Protocol, which enables nodes to effectively reduce redundant data transmission  when propagating new blocks and transactions."}]}],"pr":"c154b3ff25d7440a67b9594144601bd2df895b9a0979e0c1ce30865440fe4c41"}