{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What definitions are needed for query messages in blockchain smart contracts?","a":"Query Status: The query status is used to record the processing status of the query request. The smart contract needs to process the query  request and send the processing results as a query response."}]}],"pr":"d4280b9a1ea4339b4c49ef2ab4b7c373f091205bfa73fc8e35392f632baf3fa2"}