公开(公告)号：US20220327531A1

公开(公告)日：2022-10-13

申请号：US17595767

申请日：2020-09-23

Applicant: CHINA UNIONPAY CO., LTD.

Inventor： Hehe WANG ,  Yuzhuang XU ,  Tao ZHU ,  Yu ZHOU

IPC: G06Q20/38 ,  G06Q20/40 ,  H04L9/32

Abstract: The present disclosure provides a method and a device for control of blockchain data access based on a smart contract. The method includes obtaining, by a blockchain node, an access operation request of an institution, the access operation request including a transaction identifier of a transaction to be accessed, according to the transaction identifier, determining a blockchain state corresponding to the transaction identifier, the blockchain state including a hash value of the transaction corresponding to a last time change of the blockchain state, according to the hash value of the transaction corresponding to the last time change in the blockchain state and an identifier of the institution, performing data access control on the institution, obtaining control result, and transmitting the control result to the institution.

公开(公告)号：US20240163121A1

公开(公告)日：2024-05-16

申请号：US18575811

申请日：2022-08-04

Applicant: CHINA UNIONPAY CO., LTD.

Inventor： Yan HUANG ,  Qinglin HU ,  Yu ZHOU ,  Weihuai LIU ,  Jingxiu HU ,  Xu LE ,  Yuzhuang XU ,  Hehe WANG ,  Zhaoye XU

IPC: H04L9/00 ,  H04L9/06

CPC classification number: H04L9/50 ,  H04L9/06

Abstract: Embodiments of the disclosure provide a blockchain consensus method, apparatus, device, and storage medium and relate to the field of blockchain technology. The method includes determining, from a plurality of sub-blockchains, a target sub-blockchain to which a target block belongs, and adding the target block to the target sub-blockchain, where the target block is generated based on transaction data or obtained by synchronizing with other nodes; obtaining, from the plurality of sub-blockchains, a sequence of valid blocks for each of the plurality of sub-blockchains, where each sequence of valid blocks includes at least one valid block; and globally ranking the obtained valid blocks based on a logical clock corresponding to each of the obtained valid blocks, to obtain a global blockchain.