{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to create a versioned transaction in a blockchain?","a":"Generate digital signature: According to the version number of the transaction, use the private key to  digitally sign the transaction information. Digital signatures can ensure the authenticity and integrity of the transaction, preventing the transaction from being tampered with."}]}],"pr":"6abf2dcda431a7223be5d56200b5b0f846b534fad8b909883f77db49f8f27815"}