Abstract: A charging port device includes a charging port driver, a fast charging driver, a slow charging driver, a slow charging port cover, a fast charging port cover, an outer cover, and a mounting housing provided with a mounting hole. A fast charging port and a slow charging port are arranged in the mounting hole. An output terminal of the charging port driver is connected with the outer cover, and the outer cover is configured to cover the mounting hole. An output terminal of the fast charging driver is connected with the fast charging port cover, and the fast charging port cover is configured to cover the fast charging port. An output terminal of the slow charging driver is connected with the slow charging port cover, and the slow charging port cover is configured to cover the slow charging port.

Abstract: Embodiments disclosed herein provide a method and system for management and resolution of a blockchain-based top-level domain. The method comprises: a master node receiving request information for operations on top-level domain resource record from a requesting node, and encapsulating master node information and authenticated request information into a pre-preparation message; each normal node verifying the pre-preparation message, and after successful verification, generating a preparation message comprising request information, a request information verification identifier, and current node information; each node verifying the preparation message, when the number of authenticated preparation message sending nodes reaches a consensus threshold, adding an operation result corresponding to the request information to a new block in a local blockchain.

Abstract: Embodiments disclosed herein provide a method and system for management and resolution of a blockchain-based top-level domain. The method comprises: a master node receiving request information for operations on top-level domain resource record from a requesting node, and encapsulating master node information and authenticated request information into a pre-preparation message; each normal node verifying the pre-preparation message, and after successful verification, generating a preparation message comprising request information, a request information verification identifier, and current node information; each node verifying the preparation message, when the number of authenticated preparation message sending nodes reaches a consensus threshold, adding an operation result corresponding to the request information to a new block in a local blockchain.