Jingdong Technology Information Technology Co., Ltd.

Jingdong Technology Holding Co., Ltd.

Guangwei Zhao

Zhuguang Shao

Haibo Sun

Haiquan Huang

Shuang Zhang

Lin Zhang

A method and an apparatus are provided. The method may include: receiving a query request and signature information of the query request sent from a first node in a blockchain other than a current blockchain, where there is a proxy node of the first node in the current blockchain, and the query request includes a query content and a storage number of a public key of the first node in the current blockchain; acquiring the public key of the first node from the current blockchain based on the storage number of the public key of the first node in the current blockchain; acquiring query data indicated by the query content from the current blockchain, in response to the signature information of the query request passing verification by the public key of the first node; and feeding back a query result to the first node based on the query data.

Method and apparatus for processing data request

The invention, which discloses a blockchain consensus method, apparatus and system, relates to the technical field of computers. A specific implementation mode of the method comprises: a leader node in the same network as a client receiving a transaction message sent by the client and a transaction message sent by at least one peer node, or receiving transaction messages sent by at least two peer nodes; sending the transaction messages to a leader node in a previous-level network till the priority of the previous-level network is the highest if transaction data in the transaction messages are consistent; a leader node in a highest-priority network generating a proposal message according to the received transaction messages, and performing a consensus judgment on the proposal message based on a Byzantine fault-tolerant consensus mechanism; sending the proposal message to a leader node in a next-level network till the next-level network is the network where the client is located after the success in the consensus judgment. The implementation mode can solve the technical problems of a long transaction confirmation time and a small transaction volume carried by a block.

Blockchain consensus method, device and system

A method and device for synchronizing node data. The method comprises: determining a target block height according to a local log file used for synchronizing blockchain data of a blockchain system (); sending a data synchronization request to a target node on the basis of the target block height (); and in response to receiving update data sent by the target node, writing the update data into a local storage area (). The method improves the synchronization efficiency of lagging nodes in the blockchain system, and saves network resources.

Method and device for synchronizing node data

Provided are a blockchain data processing method and apparatus, a device, and a readable storage medium. By storing a data type information table in a relational database in advance, the data type information table is used for storing storage information of all the data types, and the storage information includes a table corresponding to the data type, a mapping relationship between the service field of the Value of the data type and a table field in the corresponding table, and a data format of the Value of the data type. A data type of the Value is determined when the Key-Value data needs to be stored; and a target table corresponding to the data type of the Value is determined and the Key-Value data is written into the target table according to the data type information table.

Growing community of inventors

Beijing, China

Guangwei Zhao