{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to set the transaction validity period in blockchain?","a":"Transaction  Finalization: Once a transaction is confirmed, it will enter the finalization stage, where the transaction data is written to the blockchain and"}]}],"pr":"e15bd8e73a0ed7b563cf13353951263b23c8b9fef3a55aa037421eb5f18d54e8"}