Jingdong Technology Information Technology Co., Ltd.

Beijing Wodong Tianjun Information Technology Co., Ltd.

Jingdong Technology Holding Co., Ltd.

Haibo Sun

Yi Wang

Ming Zhao

Chao Ma

Zhuguang Shao

Guangwei Zhao

Haiquan Huang

Chunwei Liu

Lin Zhang

Shuang Zhang

Shuaijian Wang

Long Cao

Renhui Yang

Qun Lin

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

Disclosed are a method and a system for data uploading, which belongs to the technical field of blockchain. The method comprises: receiving a block upload request sent by a slave server of a target node; determining whether block data corresponding to the block upload request has been uploaded to a block data storage system; if the block data corresponding to the block upload request is not uploaded to the block data storage system, acquiring the block data if the block data corresponding to the block upload request is not uploaded to the block data storage system, and uploading the block data to a storage space of the block data storage system; and sending an uploading success instruction to the slave server if the uploading is successful, so as to instruct the slave server to delete the block data stored on a light-weight peer in the target node.

Method and system for data uploading between blockchain nodes, and computer-readable storage medium

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 system, a method and a device for developing a smart contract are provided. A particular embodiment of the system comprises a specification acquisition module configured to acquire specification of a target smart contract interface, a client development module configured to generate, on the basis of the specification of the target smart contract interface, a smart contract client side interface and a smart contract client side agent, the smart contract client side interface and the smart contract client side agent being used to construct a client smart contract application, and a server development module configured to generate, on the basis of the interface specification of the target smart contract, a smart contract server interface and a smart contract server skeleton, the smart contract server interface and the smart contract server skeleton being used to construct a server smart contract.

System, method and apparatus for developing smart contract

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

Embodiments of the present application provide a block verification method, apparatus and device. The method includes: acquiring a block to be detected, where a plurality of transactions are stored in the block to be detected; obtaining a plurality of state operation queues according to a state item of each state operation in each transaction, where each state operation queue includes state operations belonging to the same state item; and performing parallel verification on each state operation queue and obtaining a verification result of the block. Each state operation of each transaction in the block to be detected is divided into the state operation queue corresponding to each state item according to the state item, and parallel verification is performed on each state operation queue.

Growing community of inventors

Beijing, China

Haibo Sun