{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How is the double-spending attack implemented in blockchain?","a":"Generating transactions: The attacker sends a transaction to one or more nodes in the blockchain network, which will be included in a  certain block in the blockchain."}]}],"pr":"d9223e39a7588f4e202c88bdca63839c3aa61be4f49d33f2e9c15aa9cb0c044e"}