{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to prevent the double-spending risk in blockchain networks?","a":"Consensus mechanism: Blockchain networks employ consensus mechanisms (such  as proof of work, proof of stake, etc.) to ensure network security and consistency. The consensus mechanism requires nodes to pay a certain price when participating in the blockchain network, thereby reducing malicious behavior."}]}],"pr":"42844afb98e2bbd09bca9ffa353a1151608f78acd06b791b84f919c809bb7454"}