{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain prevent double-spending attacks?","a":"Longest Chain Principle: Blockchain adopts the longest chain principle to determine which chain is valid. Attackers need to control more than 50% of the network's computing power to manipulate the chain length. However, this is challenging  due to the constantly growing nature of the blockchain, which makes it difficult for attackers to achieve a 51% majority."}]}],"pr":"dd729dc90789c12381256e5b267188bfe62e607071bd793cf245637fd6807c4e"}