{"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":"d058f359d64889f521d37e64a1bc78feb64278a02c462e4077c8be5bbc59fa00"}