{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to avoid double spending or double signing in a blockchain?","a":"Design a secure consensus mechanism: Ensure the transaction order and validity in the blockchain network by adopting secure consensus mechanisms such as Proof of Work (PoW) or Proof of Stake (PoS). This way, attackers need to consume a large amount of computing resources to tamper with the blockchain, thereby reducing the likelihood  of double spending or double signing."}]}],"pr":"c4a873aea5a4b267c725fa76a08e0cbd18487337b23f0448820d596c39654ac1"}