{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What types of messages are included in a blockchain?","a":"Smart Contract Messages: Smart contract messages refer to the messages exchanged between the smart contract and the external environment,  such as the execution"}]}],"pr":"7db77c21d08be3bfd91f3d8bcfc1406762704fe73df2802760ffe30ed9b509ec"}