{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to avoid repeating expired blockhash in blockchain transactions?","a":"Regularly update blockhash: When generating transactions, periodically update the blockhash to  ensure the used hash is the most recent. A timer can be used to periodically fetch new blockhash or manually update it each time a new transaction is generated."}]}],"pr":"95d0745ba598bd82d963dd9dc28a975de0143edfdb12c91775dc992f3b802133"}