{"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":"63ec641c3ee55f9b3ea686357e0a2238a3db4d09fc700335f8a4462ba32aefcb"}