{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What information does the message header contain in a transaction?","a":"The message header in a transaction usually contains the following information: message  type, version number, sender and receiver identifiers, message sequence number, message sending time, and message signature. These header fields are used to ensure the integrity, reliability, and security of the message, as well as to facilitate the correct processing and tracking of the message by the transaction system."}]}],"pr":"7f7e0ee1964774909a119e357ab39d775e14e1e6f19f3ad264c4605d575123df"}