{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to avoid using expired blockhash in blockchain transactions?","a":"Ensure obtaining the latest blockchain data: First, you need to get the latest blockchain data from a blockchain browser or a reliable blockchain data provider.  This data includes the latest block height, block creation time, and transaction information in the block."}]}],"pr":"ae38c52f6d35d04a1120645d6168faba7929ae53738cc59394a6f6293693c0e1"}