{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can the security of transactions be ensured in a blockchain?","a":"Consensus mechanism: The consensus mechanism in the blockchain network (such as proof of  work, proof of stake) ensures the sequence and validity of transactions."}]}],"pr":"4fef311d5f79ca4609a04032819a4bddddc20079f695f6f7bf471fc74467c687"}