{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure the security and immutability of transactions?","a":"Consensus mechanism: Nodes in the blockchain network reach  consensus on the validity of transactions through a certain mechanism. This ensures that transactions are honest and reliable, and prevents invalid transactions from being recorded on the blockchain."}]}],"pr":"209c42d2a47dfcb96ce3ab571490da3fd3eb0f4188ac4bc86a48a64711752fbc"}