{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do you determine the expiration time of a transaction in a blockchain?","a":"Smart Contracts: Smart contracts are automatic  execution programs on the blockchain that determine whether transactions meet requirements based on predefined conditions."}]}],"pr":"8f3376365042182fed0e2dc7acb2cf8e22f2fabc11242657dc151c6569aaf36d"}