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Method, device and equipment for block chain to access out-of-chain data and medium

A chain access chain, block chain technology, applied in the direction of multi-program device, digital data protection, inter-program communication, etc., can solve the problems of high delay, network congestion, etc., to achieve the effect of reducing delay and avoiding network congestion

Active Publication Date: 2022-04-12
BEIJING BAIDU NETCOM SCI & TECH CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present disclosure provides a method, device, device and medium for blockchain to access data outside the chain, so as to solve the problem of high delay and network congestion when the oracle service accesses data outside the chain

Method used

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  • Method, device and equipment for block chain to access out-of-chain data and medium
  • Method, device and equipment for block chain to access out-of-chain data and medium

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Embodiment Construction

[0032] Exemplary embodiments of the present disclosure are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present disclosure to facilitate understanding, and they should be regarded as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

[0033] figure 1 It is a flow chart of a method for accessing off-chain data provided by a blockchain according to an embodiment of the present disclosure. The embodiment of the present disclosure can be applied to a blockchain to access out-of-chain data by executing a business pre-execution request initiated based on a business contract Case. The method can be execut...

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Abstract

The invention provides a method and device for accessing out-of-chain data by a block chain, equipment and a medium, and relates to the technical field of computers, in particular to a block chain technology. The method is applied to a block chain node, and comprises the following steps: obtaining a service pre-execution request initiated based on a service contract; in the process of executing the service pre-execution request, if an access demand of out-of-chain data is detected, generating an out-of-chain data access request; according to the out-of-chain data access request, enabling the oracle machine service to access an out-of-chain data source according to the out-of-chain data access request; receiving an out-of-chain data access result fed back by the oracle machine service and an endorsement signature of the oracle machine service; continuing to execute the service pre-execution request according to the out-of-chain data access result to generate a service pre-execution result; and obtaining a business transaction request and submitting the business transaction request to the block chain. According to the technical scheme, the delay that the block chain accesses the data outside the chain can be reduced, and network congestion is avoided.

Description

technical field [0001] The present disclosure relates to the field of computer technology, and in particular to blockchain technology. Background technique [0002] Since the blockchain system is a deterministic environment, if you want to access data sources outside the chain, it can be realized through the oracle machine (Oracle) mechanism. [0003] Business contracts in the blockchain can access data sources outside the chain through the oracle service set in the oracle node. However, the defect of the existing technology is that in the process of executing the transaction request in the blockchain, there is a high delay in accessing the off-chain data through the oracle service, and then feeding back to the blockchain; the access requirement of a transaction request will trigger Multiple interactions lead to network congestion. Contents of the invention [0004] The present disclosure provides a method, device, device and medium for blockchain accessing data outside ...

Claims

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Application Information

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IPC IPC(8): G06F9/46G06F9/54G06F21/60G06Q20/38H04L9/32
Inventor 刘晓赫郑旗郑斌
Owner BEIJING BAIDU NETCOM SCI & TECH CO LTD
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