{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the security challenges in the implementation of smart contracts in blockchain technology?","a":"Unexpected scenario issue: During the execution of smart contracts, how to correctly and appropriately handle unexpected scenarios  to ensure the smooth progress of the contract is a problem that needs to be addressed."}]}],"pr":"ebc1c8856c3484e4b0c16a090ea587d69b16b8e145d0911563fc3dc0307808b1"}