{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does using cumulative difficulty prevent double-spending attacks in blockchain?","a":"Whenever a miner mines a block, the difficulty of the mined block is cumulative with the previous block's difficulty, forming a cumulative difficulty value."}]}],"pr":"061490b4f7502369d77505c4462f3a2a4cc398d48ecd3b3455986484b0440f78"}