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Block chain external data acquisition method and device

A technology of external data and acquisition methods, applied in the field of data processing, can solve problems such as unguaranteed, credible chaining, and limited application scenarios, so as to improve efficiency, improve timeliness and reliability, and avoid fragmentation

Pending Publication Date: 2022-03-11
工银科技有限公司 +2
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Problems solved by technology

[0003] At present, the data used by decentralized applications (also called distributed applications) DAPP is only the data information on the chain obtained through smart contracts. The data acquisition requirements of dynamic data information, because it is impossible to guarantee that dynamic and real-time data information can be uploaded to the chain in a credible manner during data acquisition, so this type of data acquisition requirements cannot be met, which also leads to the application of decentralized applications DAPP scenes are extremely limited
[0004] That is to say, for the blockchain data processing requests that need to be combined with real-time information outside the blockchain, the existing blockchain data processing methods cannot obtain real-time external data of the blockchain and cannot guarantee The authenticity of external data, and thus the inability to effectively and timely process blockchain data processing requests

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  • Block chain external data acquisition method and device
  • Block chain external data acquisition method and device
  • Block chain external data acquisition method and device

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Embodiment Construction

[0060] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0061] It should be noted that the blockchain external data acquisition method and device disclosed in this application can be used in the technical field of blockchain, and can also be used in any field other than the technical field of blockchain. The external data of blockchain disclosed in this application The application fields of the acquisition method a...

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Abstract

The embodiment of the invention provides a block chain external data acquisition method and device, which can be applied to the technical field of block chains, and the method comprises the steps: obtaining a target data source identifier outside a target block chain sent by a user contract based on a preset oracle contract, and obtaining verification information and a target oracle event corresponding to the target data source identifier; sending the target oracle event to a preset oracle node, so that the oracle node calls corresponding target external data from a target data source outside the target block chain according to the target data source identifier, and returns the target external data after signing the target external data; and if the received target external data passes the signature verification and the target external data is verified to accord with the verification information based on the oracle contract, calling the user contract to send the target external data to the target block chain. According to the method and the device, the external data of the block chain can be acquired, and the timeliness, authenticity and reliability of the acquired block chain data can be improved.

Description

technical field [0001] This application relates to the technical field of data processing, in particular to the field of blockchain technology, and specifically to a method and device for acquiring external data of the blockchain. Background technique [0002] The actual operation of the smart contract running on the blockchain is to customize the value transfer of the data information on the chain. The reason why the value transfer information can be recognized by all nodes on the chain under the decentralized system is also It is precisely because of the authenticity and immutability of the information transmitted on the chain. [0003] At present, the data used by decentralized applications (also called distributed applications) DAPP is only the data information on the chain obtained through smart contracts. The data acquisition requirements of dynamic data information, because it is impossible to guarantee that dynamic and real-time data information can be uploaded to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/32H04L9/40G06Q40/04H04L69/22
CPCH04L9/3247H04L9/3268H04L63/126H04L63/0428H04L9/3239G06Q40/04H04L69/22
Inventor 李鹏飞张强梁智昊周海京杨毅王舒榕
Owner 工银科技有限公司
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