{"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":"f60074ebbc834198f1b2328ab8c54b9505031ed8509b3847806742ea67b3ffd0"}