{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain handle the validation of transaction operation effectiveness?","a":"Confirm the transaction input refers to the transaction and output：For non-Coinbase transactions，you need to verify whether each input refers to a transaction existing on the main chain  and whether the referred output exists in the transaction."}]}],"pr":"03956fa32948aca33bedc8d2d6c5748ce2e8cad7d4982200cf3f568ebfd0c0e8"}