{"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":"493041be5dfc8aa7a568ef502a3b0bd5e95de82721ec7e6394acbe14320b0dab"}