{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the specific reasons for refunding fees in blockchain transactions?","a":"Incorrect transaction fees: Due to market fluctuations or changes in the blockchain network's algorithm, the required transaction fee for a transaction may change after the transaction is submitted. If  the sender paid an incorrect fee, the difference may be refunded."}]}],"pr":"bfb493066ed24d3db293439cfbe875b5b61c4ade0360eb56f836adb7603b3a29"}