{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to securely handle transaction expiry issues in blockchain?","a":"Ensure the security of the blockchain network: Protect  the blockchain network using encryption algorithms (such as SHA-256) and consensus mechanisms (such as Proof of Work and Proof of Stake) to prevent security vulnerabilities like double-spending attacks."}]}],"pr":"e157225f5e9ceb5fb2b6cb5ef9711a2c0ea9d23093b214fd4dcc9acab20239f9"}