WO2020024903A1

WO2020024903A1 - Method and device for searching for blockchain data, and computer readable storage medium

Info

Publication number: WO2020024903A1
Application number: PCT/CN2019/098186
Authority: WO
Inventors: 肖诗源
Original assignee: 上海点融信息科技有限责任公司
Priority date: 2018-08-03
Filing date: 2019-07-29
Publication date: 2020-02-06
Also published as: CN109145188A

Abstract

Disclosed in the present invention is a method for searching for blockchain data. The method comprises: A. receiving a web page reading request by means of a hypertext transfer protocol interface, the web page reading request comprising a first uniform resource location address and first time information; B. determining whether an index associated with the first uniform resource location address exists in a cache, wherein the cache stores one or more indexes retrieved in a predetermined period of time, and each index comprises a retrieved uniform resource location address, a web page associated with the uniform resource location address, and second time information; and C1. in a case where an index associated with the first uniform resource location address exists in the cache and the first time information is earlier than the second time information in the index, returning the web page associated with the first uniform resource location address by means of the hypertext transfer protocol interface.

Description

Method, device and computer-readable storage medium for searching blockchain data

Technical field

The present invention relates to a blockchain search technology, and more particularly, to a method for searching for blockchain data, a device for searching for blockchain data, and a corresponding computer-readable storage medium.

Background technique

A search engine refers to a system that automatically collects information from the World Wide Web and provides it to users for query after a certain sorting. In the process of collecting information by search engines, it uses what is called a spider to connect to hyperlinks on each web page. The web crawler program, based on the hyperlinks to the webpage links, is like "one pass ten, ten pass 100 ..." in daily life, starting from a few web pages and connecting to all other web pages on the web. In theory, a web crawler can traverse most web pages if there are appropriate hyperlinks on the web pages.

Blockchain is an intelligent peer-to-peer network that uses a distributed database to identify, disseminate, and record information, also known as the Internet of Value. Blockchain has technical advantages such as decentralization, anti-tampering, data consistent storage, and transparent and traceable processes.It is considered to have a wide range of applications in many fields such as finance, credit reporting, the Internet of Things, economic and trade settlement, and asset management. prospect.

Summary of the invention

Embodiments of the present invention provide a method, a device, and a computer-readable storage medium for searching for blockchain data, which can collect information from the retrieved index, thereby improving the search efficiency for the blockchain data.

To this end, a first aspect of the present invention proposes a method for searching blockchain data, the method comprising:

A. receiving a webpage read request via a hypertext transfer protocol interface, where the webpage read request includes a first uniform resource location address and first time information;

B. Determine whether an index associated with the first uniform resource location address exists in the cache, wherein the cache stores one or more indexes retrieved within a predetermined period of time, each index including the retrieved uniform resource A positioning address, a webpage associated with the uniform resource positioning address, and second time information;

C1. An index associated with the first uniform resource location address exists in the cache, and if the first time information is earlier than the second time information in the index, via the The hypertext transfer protocol interface returns a webpage associated with the first uniform resource location address.

In addition, a second aspect of the present invention proposes a device for searching for blockchain data, the device including: a processor; and a memory for storing instructions that cause the processing when the instructions are executed The processor does the following:

Finally, a third aspect of the present invention provides a computer-readable storage medium having computer-readable program instructions stored thereon, the computer-readable program instructions for performing the first aspect according to the present invention The method for searching blockchain data.

The method, device and corresponding computer-readable storage medium for searching for blockchain data according to the present invention can determine whether the same search has been performed based on the retrieved index stored in the cache, and it is determined that the same search has been performed. The same index is returned in the case of the same retrieval, thereby improving the search efficiency of the blockchain data.

BRIEF DESCRIPTION OF THE DRAWINGS

The features, advantages, and other aspects of the embodiments of the present invention will become more apparent with reference to the drawings and the following detailed description. Several embodiments of the present invention are shown here by way of example and not limitation. In the drawings:

1 is a schematic diagram of a network structure of a blockchain according to the present invention;

2A is a flowchart of a method for searching blockchain data according to the present disclosure;

2B is a schematic diagram of a first embodiment of an index stored in a cache according to the present invention;

3 is a flowchart of a first embodiment of a method for searching blockchain data according to the present disclosure;

4A is a flowchart of a second embodiment of a method for searching blockchain data according to the present disclosure;

4B is a schematic diagram of a second embodiment of an index stored in a cache according to the present disclosure;

5 is a schematic diagram of a first embodiment of a device for searching blockchain data according to the present disclosure; and

FIG. 6 is a schematic diagram of a second embodiment of a device for searching blockchain data according to the present disclosure.

detailed description

Hereinafter, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of methods and systems according to various embodiments of the present invention. It should be noted that each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and the module, program segment, or part of the code may include one or more components for implementing various embodiments. Executable instructions for a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may also occur in a different order than those marked in the drawings. For example, two blocks represented one after the other may actually be executed substantially in parallel, or they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the flowcharts and / or block diagrams, and combinations of blocks in the flowcharts and / or block diagrams, can be implemented using a dedicated hardware-based system that performs the specified function or operation , Or it can be implemented using a combination of dedicated hardware and computer instructions.

The terms "including", "including" and similar terms used herein should be understood as open terms, that is, "including / including but not limited to", meaning that other content may also be included. The term "based on" is "based at least in part on." The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment", and so on.

Techniques, methods, and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but where appropriate, the techniques, methods, and equipment should be part of the description. The connection between the units in the drawing is only for the convenience of description, which means that at least the units at both ends of the connection are in communication with each other, and it is not intended to limit the communication between the units that are not connected.

The term "search node" in the context of the present invention refers to a type of blockchain node that is independent of other nodes in the blockchain. A hypertext transfer protocol interface is provided on the search node to process web pages sent by search engines or user equipment. The read request has a cache to store the index, and the search node can only synchronize the public data on the blockchain.

The term "read" in the term "webpage read request" includes crawling a webpage by a search engine and obtaining a webpage by a user through a user device, where obtaining a webpage by the user device specifically refers to the user's Device to query or browse web pages generated by blockchain data.

The term "user equipment" in the context of the present invention refers to smart terminals including, but not limited to, smart phones, tablet computers, desktops, and notebook computers.

The term “uniform resource location address” in the present invention refers to the address of a standard resource on the Internet, also known as a Uniform Resource Locator (URL) or a web page address. Accordingly, the term "first uniform resource location address" in the content of the present invention refers to the uniform resource location address at the current level when the method for searching for blockchain data according to the present invention is executed, that is, the URL at the current level; and The term “second uniform resource location address” in the content of the present invention refers to a uniform resource location address at a lower level when the method for searching for blockchain data according to the present invention is executed, that is, a secondary URL.

The term "first blockchain data" in the summary of the present invention refers to the blockchain data at the first uniform resource location address in the blockchain; correspondingly, the term "second block" in the present disclosure "Chain data" refers to the blockchain data at the second uniform resource location address in the blockchain.

The term "public data" in the context of the present invention refers to data that can be accessed without authentication, and "privacy data" refers to data that requires authentication to be accessible.

The term "first time information" in the context of the present invention refers to the modification time of the last time a user device or search engine visited a webpage related to a uniform resource location address; the term "second time information" refers to a block at the uniform resource location address The time when the chain data was updated.

The terms "first" and "second" in this summary are only used to describe a reference, purpose, or something, and cannot be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated. .

The term "plurality" in this summary means two or more.

The terms "retrieval" and "search" appear in the content of the present invention, wherein the term "retrieval" refers to the process of crawling, processing, indexing, and traversing of blockchain data by a search engine through a web crawler program, and the term " "Search" refers to a search engine receiving a search for content of a webpage that has been previously indexed after a user enters a keyword on a search engine page.

The expression "the second blockchain data at the at least one second uniform resource location address is associated with the first blockchain data" means that the first blockchain data includes The hierarchical attribute and the predetermined hierarchical relationship tree indicate whether there is an association relationship of the second blockchain data at the second uniform resource location address.

The term "hierarchical relationship tree" in the present invention refers to a predetermined logical relationship tree indicating a hierarchical structure of a webpage generated by the accessed blockchain data.

The term "hierarchical attribute" in the content of the present invention refers to information indicating to which layer of the above hierarchical relationship tree the uniform resource location address associated with the read webpage belongs.

The term "first attribute" in the context of the present invention is used to mark blockchain data as private or public.

The term "public ledger" in the present context refers to a blockchain ledger in which only public data that can be accessed without authentication is stored.

The term “privacy ledger” in the context of the present invention refers to a blockchain ledger in which only private data that requires access to authentication is stored.

The term "public area of the ledger" in the present context refers to an area in the ledger for storing public data.

The term "privacy area of the ledger" in the context of the present invention refers to the area in the ledger for storing private data.

The embodiments of the present invention mainly focus on the following technical issues: first, the current blockchain nodes cannot process the hypertext transfer protocol requests sent by search engines; second, the current web search engines use web crawlers to crawl web pages. Iterate over the information in the network, but the current search engine cannot traverse the blockchain data in the blockchain network; again, when retrieving the data in the existing blockchain, due to the amount of data in the blockchain It is easy to cause the burden of the blockchain nodes responsible for retrieval, the retrieval speed is slow, the retrieval efficiency is low, and it may interfere with the normal operation of the blockchain. In addition, there may be risks of obtaining protected data (that is, private data). In addition, the current search engine should search for public data, and the blockchain network may store both public data and private data. During the search process, these two types of data should be distinguished.

In order to solve these problems and implement a search service for a blockchain network, an embodiment of the present invention first provides a hypertext transfer protocol interface. The hypertext transfer protocol interface is, for example, located in a search node of a blockchain, so that the search node Ability to process Hypertext Transfer Protocol requests sent by search engines or user devices. Secondly, a cache is set in the search node, so that the cache can store indexes retrieved by the search engine or user equipment within a predetermined period of time. Third, the embodiment of the present invention adds the uniform resource location address of other webpages as information to the webpage, so that the search engine can link to other webpages through the webpage, and implements the webpage crawling function for the blockchain network. In addition, the embodiments of the present invention also distinguish between public data and private data in the blockchain network. For more specific implementation methods and other advantages of the present invention, please refer to the description below.

FIG. 1 shows a schematic diagram of a blockchain network structure 100 according to the present invention. In FIG. 1, the blockchain network structure 100 includes

blockchain nodes

111, 112, 113, 114, 115, 116, and search. Node 117; wherein the search node 117 includes a cache. Blockchain nodes 111-116 and search nodes 117 can synchronize data through a network, which can be any wired and / or wireless network.

In the present invention, the search node 117 can only synchronize public data, and cannot synchronize private data. It should be noted that, in the content of the present invention, existing or future developed synchronization technologies can be used to implement data synchronization. In addition, the cache set in the search node 117 can store one or more indexes retrieved within a set period of time, each index including the retrieved uniform resource location address, a webpage associated with the uniform resource location address, and Second time information. FIG. 2B shows an exemplary index stored in the cache, which includes URL1 and its corresponding webpage html_1, second time information STAMP1, URLn and its corresponding webpage html_n, second time information STAMPn. In addition, in view of the limitation of the cache capacity in the search node 117, when the set time period ends, all indexes in the cache will be deleted to achieve real-time updating of the indexes in the cache.

FIG. 2A shows a flowchart of a method 200 for searching for blockchain data. In this embodiment, the search node 117 in the blockchain network 100 shown in FIG. 1 may implement the method 200 shown in FIG. 2A. details as follows:

Step 210: Receive a webpage read request via a hypertext transfer protocol interface, where the webpage read request includes a first uniform resource location address and first time information.

When crawling webpage information, the search engine can add the following functions, that is, the search engine can access the entry address of the blockchain (for example: http: //test.com.homepage), so that the search engine can access the block chain. Alternatively, the user can use a browser to access the entrance address of the blockchain (for example: http: //test.com.homepage), so that the user can access the blockchain.

Step 220: Determine whether an index associated with the first uniform resource location address exists in the cache.

In this step, it is determined whether an index associated with the first uniform resource location address exists in the cache according to the first uniform resource location address in the webpage read request, and the cache is stored and retrieved within a predetermined period of time. One or more indexes of each, each index including the retrieved uniform resource location address, a webpage associated with the uniform resource location address, and second time information

Step 230: An index associated with the first uniform resource location address exists in the cache, and if the first time information is earlier than the second time information in the index, The hypertext transfer protocol interface returns a webpage associated with the first uniform resource location address; the specific implementation is as follows:

First, determine whether a search engine or user has visited a webpage associated with the first uniform resource location address, and when an index associated with the first uniform resource location address exists in the cache, it indicates that the search engine or user has visited Then, determine whether the specific modification time (ie, first time information) of the visited webpage is earlier than the modification time of the corresponding webpage stored in the cache (ie, the second time representing the update time of the blockchain data) Information), when the first time information is earlier than the second time information in the index, it indicates that the webpage associated with the first uniform resource location address has been modified.

Secondly, when it is determined that the webpage associated with the first uniform resource location address has been modified, the webpage associated with the first uniform resource location address in the index will be returned to the search engine or the user via the Hypertext Transfer Protocol interface. This ensures that search engines or users get the latest search results.

In addition, specifically how to generate a webpage associated with the first uniform resource location address can be implemented in various ways. For example, the blockchain data pointed to by the first uniform resource location address can be generated in a webpage. In addition, if there is at least one second uniform resource location address, that is, the second uniform resource location address, the second uniform resource location address It can also be presented on the webpage, so the webpage can include both the data of the blockchain and the uniform resource location address. In the case where there are multiple uniform resource location addresses, these uniform resource location addresses can be sequentially arranged on the webpage. It can also be implemented by generating a logical search tree diagram associated with the data in the blockchain data according to its logical relationship.

Next, the webpage is returned to the user device or search engine. After receiving the returned webpage, the user equipment or search engine can either directly extract the blockchain data and its access address, or initiate a further webpage read request to the blockchain network side to capture the subsequent Blockchain data.

If an index associated with the first uniform resource location address exists in the cache and the first time information is equal to the second time information in the index, via the hypertext transfer protocol The interface returns an identifier indicating that the web page has not been modified. Specifically, if it is determined that an index associated with the first uniform resource location address exists in the cache and the first time information is equal to the second time information in the corresponding index, it indicates that the webpage that the user or search engine has searched for has not changed, that is, There is no need to provide search results to the user or search engine, so an identifier indicating that the web page has not been modified is returned via a hypertext transfer protocol interface. In a specific implementation, the HTTP status code '304' may be returned to indicate the above situation.

In this embodiment, if it is determined that there is no index associated with the first uniform resource location address in the cache, the method 200 further includes the following steps:

First, if there is no index associated with the first uniform resource location address in the cache, first blockchain data at the first uniform resource location address is obtained. Secondly, it is determined whether there is at least one second uniform resource location address, wherein the second blockchain data at the at least one second uniform resource location address is associated with the first blockchain data. Again, in the case where the at least one second uniform resource location address exists, generating the association with the first uniform resource location address according to the first blockchain data and the at least one second uniform resource location address Or a webpage associated with the first uniform resource location address according to the first blockchain data when the at least one second uniform resource location address does not exist. Then, a webpage associated with the first uniform resource location address is returned via the hypertext transfer protocol interface. Finally, the first uniform resource location address, the webpage associated with the first uniform resource location address, and the second time information are stored in the cache as a new index.

In the content of the present invention, obtaining the first blockchain data at the first unified resource location address specifically includes: determining whether to obtain the first unified data according to the ledger storage location of the first blockchain data. The first blockchain data at the resource location address; specifically, if the first blockchain data or the second blockchain data is public data, the first blockchain data or Said second blockchain data is stored in a public ledger; and in a case where said first blockchain data or said second blockchain data is private data, said first blockchain data or said The second blockchain data is stored in the privacy ledger; in the case where the first blockchain data is stored in the public ledger, the first blockchain data at the first uniform resource location address is obtained .

In the content of the present invention, acquiring the first blockchain data at the first uniform resource location address may further include: determining whether to acquire the first blockchain data according to a location of the storage area of the first blockchain data. The first blockchain data at the uniform resource location address; specifically, in a case where the first blockchain data or the second blockchain data is public data, the first blockchain data or The second blockchain data is stored in a public area of the ledger; and in a case where the first blockchain data or the second blockchain data is private data, the first blockchain data Or the second blockchain data is stored in the privacy area of the ledger; in the case where the first blockchain data is stored in the public area of the ledger, it is obtained at the first uniform resource location address Of the first blockchain data.

In the content of the present invention, determining whether there is at least one second uniform resource location address further includes: determining whether the at least one first resource exists according to a hierarchical attribute included in the first blockchain data and a predetermined hierarchical relationship tree. Second, the uniform resource location address.

In the present invention, when generating a webpage associated with the first uniform resource location address, the hierarchical attributes included in the blockchain data can also play a very important role. It includes a hierarchical attribute and a predetermined hierarchical relationship tree to determine whether there is at least one second uniform resource location address. Specifically, for example, the hierarchical attribute of the blockchain data A is "insurance", and the predetermined hierarchical relationship tree indicates that there exists the blockchain data B whose hierarchical attribute is "insurance / blockchain insurance", then the blockchain data B It is the next level of blockchain data of blockchain data A. If the webpage read request is to capture the blockchain data A whose hierarchical attribute is "insurance", the uniform resource location address pointing to the blockchain data B whose hierarchical attribute is "insurance / blockchain insurance" is also generated in On the webpage, the generated webpage contains a uniform resource location address pointing to the blockchain data B whose hierarchical attribute is "insurance / blockchain insurance".

In addition, in this embodiment, in order to ensure that the index stored in the cache contains the latest blockchain data of the corresponding uniform resource location address, so as to quickly and effectively return the latest web page to the user or search engine, the present invention The provided method for searching for blockchain data further includes a first embodiment 300 as shown in FIG. 3 to facilitate updating the index in the cache, and specifically includes the following steps:

Step 310: Determine the blockchain data at the corresponding unified resource location address in the blockchain based on the unified resource location address stored in each index.

Step 320: Compare the blockchain data with data corresponding to a webpage stored in the index to determine whether the blockchain data at the uniform resource location address is updated.

In this step, when there is a difference between the blockchain data and the data corresponding to the webpage stored in the index, it indicates that the blockchain data at the uniform resource location address has been updated.

Step 330: In the case that the blockchain data at the uniform resource location address is updated, update the webpage associated with the uniform resource location address in the index to be generated based on the updated blockchain data And update the second time information to the update time of the blockchain data.

The present invention can use this embodiment to update the corresponding index in the cache.

Alternatively, the present invention may also use the following embodiments to implement real-time updating of indexes in the cache:

First, the blockchain data at the corresponding uniform resource location address in the blockchain is determined based on the uniform resource location address stored in each index.

Secondly, the modification time information of the blockchain data is compared with the second time information in the index to determine whether the blockchain data at the uniform resource location address is updated.

Specifically, when the modification time information of the blockchain data is not later than the second time information in the index, it indicates that the blockchain data at the uniform resource location address has not been updated. When the modification time of the blockchain data is When the information is later than the second time information in the index, it indicates that the blockchain data at the uniform resource location address has been updated.

Third, in a case where the modification time information of the blockchain data is later than the second time information in the index, the webpage associated with the uniform resource location address is updated in the index to be based on the update A webpage generated by the blockchain data and updates the second time information to the update time of the blockchain data.

The present invention can also use the above embodiments to update the corresponding indexes in the cache in real time.

Optionally, in order to ensure that the index stored in the cache contains the latest blockchain data of the corresponding uniform resource location address, in order to quickly and effectively return the latest webpage to the user equipment or search engine, the present invention provides The method for searching for blockchain data can also use the second embodiment 400 shown in FIG. 4A to achieve the above purpose.

In the method shown in FIG. 4A, first, the webpage read request further includes a first indicator indicating that it is allowed to return the difference webpages, and each index in the cache further includes one or more difference webpages and corresponding data to each difference webpage. Corresponding time period information.

The specific operation of the method 400 shown in FIG. 4A is as follows:

Step 410: Determine the blockchain data at the corresponding unified resource location address in the blockchain based on the unified resource location address stored in each index.

Step 420: Compare the blockchain data with data corresponding to a webpage stored in the index to determine whether the blockchain data at the uniform resource location address is updated.

In this step, the blockchain data is compared with the data corresponding to the webpage stored in the index to determine whether there is a data difference. When there is a data difference, it is determined that the blockchain at the uniform resource location address has been updated. data.

Step 430: When the blockchain data at the uniform resource location address in the index is updated, use the data between the updated blockchain data and the data corresponding to the webpage stored in the index. The difference generates a corresponding difference webpage, and uses the second time information and the update time of the blockchain data as the time period information corresponding to the difference webpage.

Step 440: Update the webpage associated with the uniform resource location address to a webpage generated according to the updated blockchain data, and update the second time information to the update time of the blockchain data.

Therefore, the updated index includes a uniform resource location address, a webpage associated with the uniform resource location address, second time information, one or more difference webpages associated with the uniform resource location address, and each difference Information about the time period corresponding to the web page.

In actual operation, if the second embodiment 400 shown in FIG. 4A is used to update the index in the cache, an index associated with the first uniform resource location address exists in the cache and the first If the time information is earlier than the second time information in the index, the method for searching for blockchain data further includes:

First, it is determined whether a first indicator exists in the received webpage reading request.

That is, when the first indicator is present, it indicates that the search engine or the browser used by the user that issued the read request of the webpage is allowed to return the difference webpage.

Secondly, in the case where the first indicator exists in the received webpage reading request, based on the time difference between the first time information and the second time information, it is determined that there is a time difference between the cache and the time. When the corresponding one or more difference webpages are returned, one or more of the difference webpages corresponding to the time difference are returned via the hypertext transfer protocol interface.

The above steps of the present invention can all be implemented by the search node 117 shown in FIG. 1.

For example, when the search engine sends a webpage read request including the first uniform resource location address URLx, the first time information (for example, 18:30), and the first indicator to the search node 117, the search node 117 looks for the existence in the cache The index associated with URLx. An example of the index associated with URLx in the cache is shown in FIG. 4B, and specifically includes URLx and its corresponding web page html_x, second time information (for example, 19:00), and obtained according to URLx within a predetermined time period. Multiple different difference pages (for example, △ html_1, △ html_2, △ html_3) and the time period information corresponding to these difference pages (for example, 18: 45-19: 00, 18: 30-18: 45, 18: 10-18: 30). The search node 117 is based on the time difference (18: 30-19: 00) between the first time information (e.g., 18:30) and the second time information (e.g., 19:00), and selects from a plurality of times in the index In the time period information (for example, 18: 10-18: 30, 18: 30-18: 45, 18: 45-19: 00), it is determined that there are two difference webpages in the cache (that is, respectively corresponding to 18:45 -1html, △ html_1, △ html_2 of 19:00, 18: 30-18: 45), the search node 117 returns the two difference web pages via the hypertext transfer protocol interface.

For another example, when the search engine sends a webpage read request including the first uniform resource location address URLx, the first time information (for example, 08:20), and the first indicator to the search node 117, the search node 117 looks for whether in the cache There is an index associated with URLx. In a case where the predetermined time period is set to two hours, and if an index associated with URLx exists in the cache, the second time information (for example, 19:00) corresponding to URLx is viewed, and URLx is also found Corresponding multiple time period information (for example, 18: 10-18: 30, 18: 30-18: 45, 18: 45-19: 00), but given the first time information (for example, 08:20) and The time difference between the second time information (e.g., 19:00) far exceeds the predetermined time period (e.g., two hours), then the search node 117 will change the webpage (e.g., html_x) associated with URLx from The cache is returned to the search engine via the Hypertext Transfer Protocol interface.

In the present invention, in order to realize the correct analysis of the blockchain data associated with the unified resource location address, the present invention proposes to configure the blockchain data to specify the analysis method of the blockchain data. Attributes. For example, the attribute includes a data format name for a data analysis method representing the blockchain data.

When implementing the above link addresses, it is also necessary to follow the Robots protocol that search engines need to abide by. Specifically, the Robots protocol is also known as the crawler protocol, robot protocol, etc., and its full name is "Robots Exclusion Protocol". The website tells search engines which pages can be crawled and which pages cannot be crawled through the Robots protocol.

Specifically to the content of the present invention, for each link address in the portal page, the link addresses that the search engine is allowed to traverse are also notified through the Robots protocol. The present invention utilizes the properties of the blockchain data itself (for example, the disclosed blockchain data includes public data and privacy data) to control the search behavior of the search engine, where the public data and privacy data are stored The public data and the private data have different marks at different locations on the blockchain.

Fabric, Corda and other alliance chains control access to all data in all blockchain data. It can be seen that the blockchain platform has the same access control for data with different requirements without having different access control capabilities. Generally speaking, the enterprise-level blockchain usually uses the alliance chain platform to control access to all data, which makes it impossible for external search engines to retrieve the information that needs to be disclosed.

Specifically, there can be many implementation methods and methods for storing public data and private data in different locations of the blockchain or public data and private data having different marks.

For example, the present invention can distinguish multiple ledgers, such as marking the first ledger as a public ledger, that is, only the above-mentioned public data is stored on it, and other ledgers are marked as private ledgers, on which only privacy data. Those skilled in the art should understand that the number of public ledgers and privacy ledgers can be dynamically configured according to the ratio of data to be disclosed and privacy data on the blockchain. In this way, the data on the blockchain network can be treated differently, thereby providing guarantee for subsequent search services for data on the blockchain.

In the case where the first blockchain data is stored in the public ledger, the first blockchain data at the first uniform resource location address is obtained. In the case where the first blockchain data at the first uniform resource location address is stored in the privacy ledger, the first blockchain data cannot be obtained.

Alternatively, it is also possible to divide the first ledger into two different areas, for example, to store public data in the first area, and to store private data in the second area. The data on the blockchain is treated differently, thereby providing guarantee for subsequent search services for data on the blockchain.

In the case where the first blockchain data is stored in the public area of the ledger, the first blockchain data at the first uniform resource location address is obtained; the first blockchain data is stored in the private area of the ledger In this case, the first blockchain data cannot be obtained.

Additionally or alternatively, the blockchain data is stored in a key / value manner, where the blockchain data also includes a first attribute. When the first attribute indicates that the blockchain data is public data, the blockchain data can be retrieved; when the first attribute indicates that the blockchain data is private data, the blockchain data cannot be retrieved.

Aiming at the technical problem that access to blockchain data on the blockchain network cannot guarantee that the search requirements of search engines such as the Robots protocol are met, the inventor of the present invention innovatively realizes that the The attributes of the data are adapted to the search engine, so as to achieve the purpose of searching the data on the blockchain network based on the search engine. In addition, while implementing the retrieval, it can also satisfy the privacy protection of the blockchain for some data that needs privacy protection.

The above method for searching for blockchain data can, on the one hand, enable retrieval of only public data on the blockchain and avoid the acquisition of private data on the blockchain; on the other hand, it can use the index in the cache to determine whether it has been performed Passing the same search facilitates fast response to web page read requests, and reduces the pressure on search nodes to process web page read requests, thereby improving the search efficiency of open data on the blockchain. At the same time, the solution provided by the present invention can also reduce the burden and interference on the blockchain during the search process, to avoid direct access by search engines to other nodes in the blockchain, and thus reduce the search engine's access to blocks. The risk of private data on the chain enhances the security of the blockchain and the traditional Internet interconnection process. In addition, the solution provided by the present invention can realize the interconnection and interconnection of the blockchain and Internet information, and further exert the great value of the blockchain.

Further, alternatively, the above method can be implemented by a computer program product, that is, a computer-readable storage medium. The computer program product may include a computer-readable storage medium having computer-readable program instructions for carrying out various aspects of the present disclosure. The computer-readable storage medium may be a tangible device that can hold and store instructions used by the instruction execution device. The computer-readable storage medium may be, for example, but not limited to, an electric storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (non-exhaustive list) of computer-readable storage media include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) Or flash memory), static random access memory (SRAM), portable compact disc read only memory (CD-ROM), digital versatile disc (DVD), memory stick, floppy disk, mechanical encoding device, such as a printer with instructions stored thereon A protruding structure in the hole card or groove, and any suitable combination of the above. Computer-readable storage media used herein are not to be interpreted as transient signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (for example, light pulses through fiber optic cables), or via electrical wires Electrical signal transmitted.

FIG. 5 shows a block diagram of a device 500 for searching for blockchain data according to a first embodiment of the present disclosure. As can be seen from FIG. 5, the device 500 for searching for blockchain data includes a processor 501 and a memory 502 coupled to the processor 501. The memory 502 stores instructions. When executed by the processor 501, the instructions cause the processor 501 to perform the following actions:

In an embodiment according to the present invention, when the instruction is executed, the processor 501 further performs the following operations:

C2. When an index associated with the first uniform resource location address exists in the cache and the first time information is equal to the second time information in the index, transmitted via the hypertext The protocol interface returns an identifier indicating that the web page has not been modified.

D11. Determine the blockchain data at the corresponding unified resource location address in the blockchain based on the unified resource location address stored in each index;

D12: comparing the blockchain data with data corresponding to a webpage stored in the index to determine whether the blockchain data at the uniform resource location address is updated;

D13. In the case where the blockchain data at the uniform resource location address is updated, the webpage associated with the uniform resource location address is updated in the index to be generated based on the updated blockchain data A webpage, and updates the second time information to the update time of the blockchain data.

D21. Determine the blockchain data at the corresponding unified resource location address in the blockchain based on the unified resource location address stored in each index;

D22. Compare the modification time information of the blockchain data with the second time information in the index to determine whether the blockchain data at the uniform resource location address is updated;

D23. In the case that the modification time information of the blockchain data is later than the second time information in the index, the webpage associated with the uniform resource location address is updated in the index to be based on the updated A webpage generated by the blockchain data, and updating the second time information to an update time of the blockchain data.

In an embodiment according to the present invention, the webpage reading request further includes a first indicator indicating that a difference webpage is allowed to be returned, and each index in the cache further includes one or more difference webpages and a data file corresponding to each The time period information corresponding to a difference webpage, when the instruction is executed, also causes the processor 501 to perform the following operations:

E1. Determine the blockchain data at the corresponding unified resource location address in the blockchain based on the unified resource location address stored in each index;

E2. Compare the blockchain data with data corresponding to a webpage stored in the index to determine whether the blockchain data at the uniform resource location address is updated;

E3. When the blockchain data at the uniform resource location address in the index is updated, use the data difference between the updated blockchain data and the data corresponding to the webpage stored in the index Generating a corresponding difference webpage, and using the second time information and the update time of the blockchain data as the time period information corresponding to the difference webpage;

E4. Updating the webpage associated with the uniform resource location address to a webpage generated according to the updated blockchain data, and updating the second time information to the update time of the blockchain data.

In an embodiment according to the present invention, an index associated with the first uniform resource location address exists in the cache, and the first time information is earlier than the second time information in the index. In the case of execution, the instruction further causes the processor 501 to perform the following operations:

F1. Determine whether a first indicator exists in the received webpage reading request;

F2. In the case where the first indicator exists in the received webpage read request, based on the time difference between the first time information and the second time information, it is determined that the time difference exists in the cache When the corresponding one or more difference webpages are returned, one or more of the difference webpages corresponding to the time difference are returned via the hypertext transfer protocol interface.

C31. When there is no index associated with the first uniform resource location address in the cache, obtain first blockchain data at the first uniform resource location address;

C32. Determine whether there is at least one second uniform resource location address, wherein the second blockchain data at the at least one second uniform resource location address is associated with the first blockchain data;

C33. In the case where the at least one second uniform resource location address exists, generating the association with the first uniform resource location address according to the first blockchain data and the at least one second uniform resource location address Web pages; and

C34. A webpage associated with the first uniform resource location address is returned via the hypertext transfer protocol interface.

In an embodiment according to the present invention, after the webpage associated with the first uniform resource location address is returned via the hypertext transfer protocol interface in the step C34, the instruction causes the processing when executed. The router 501 also performs the following operations:

C35. The first uniform resource location address, a webpage associated with the first uniform resource location address, and the second time information are stored in the cache as an index.

When the at least one second uniform resource location address does not exist, a webpage associated with the first uniform resource location address is generated according to the first blockchain data.

In an embodiment according to the present invention, determining whether there is at least one second uniform resource location address in step C32 further includes:

Determining whether the at least one second uniform resource location address exists according to a hierarchical attribute included in the first blockchain data and a predetermined hierarchical relationship tree.

In an embodiment according to the present invention, obtaining the first blockchain data at the first uniform resource location address in step C31 further includes:

Determining whether to obtain the first blockchain data at the first uniform resource location address according to the ledger storage location of the first blockchain data,

Wherein, in a case where the first blockchain data or the second blockchain data is public data, the first blockchain data or the second blockchain data is stored in a public ledger; And in a case where the first blockchain data or the second blockchain data is private data, the first blockchain data or the second blockchain data is stored in a privacy ledger;

In a case where the first blockchain data is stored in the public ledger, the first blockchain data at the first uniform resource location address is acquired.

Determining whether to obtain the first blockchain data at the first uniform resource location address according to the storage area location of the first blockchain data,

Wherein, in a case where the first blockchain data or the second blockchain data is public data, the first blockchain data or the second blockchain data is stored in a public area of a ledger Medium; and in the case where the first blockchain data or the second blockchain data is privacy data, the first blockchain data or the second blockchain data is stored in the privacy of the ledger Area

In a case where the first blockchain data is stored in a public area of the ledger, the first blockchain data at the first uniform resource location address is acquired.

In an embodiment according to the present invention, the first blockchain data and / or the second blockchain data includes a first attribute, and wherein, in step C31, the first unified The first blockchain data at the resource location address further includes:

When the first attribute of the first blockchain data indicates that the first blockchain data is public data, the first blockchain data at the first uniform resource location address is obtained.

In summary, the method, device and corresponding computer-readable storage medium provided by the present invention for searching for blockchain data can, on the one hand, search the cache for previously searched data to improve the performance of the blockchain data. Search efficiency, on the other hand, can make precise control of the data on the blockchain, achieve only access to publicly available data, and limit an internal mechanism and interface for access and retrieval, which not only allows external web links to directly link to the zone The public data in the blockchain can also link the public data in the blockchain. In addition, the solution provided by the present invention can realize the rapid interconnection and interconnection of the blockchain and Internet information, and further exert the great value of the blockchain.

FIG. 6 shows a schematic block diagram of a device 600 for searching blockchain data. It should be understood that the device 600 may be implemented to implement the functions of the method 200 for searching for blockchain data in FIG. 2A. It can be seen from FIG. 6 that the device 600 for searching for blockchain data includes a central processing unit (CPU) 601 (for example, a processor), which can be based on computer program instructions stored in a read-only memory (ROM) 602 or Computer program instructions loaded from a storage unit 608 into a random access memory (RAM) 603 to perform various appropriate actions and processes. In the RAM 603, various programs and data required for the operation of the device 600 can also be stored. The CPU 601, the ROM 602, and the RAM 603 are connected to each other through a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

Multiple components in the device 600 are connected to the I / O interface 605, including: an input unit 606, such as a keyboard, a mouse, etc .; an output unit 607, such as various types of displays, speakers, etc .; a storage unit 608, such as a magnetic disk, an optical disk, etc. And a communication unit 609, such as a network card, a modem, a wireless communication transceiver, and the like. The communication unit 609 allows the device 600 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

Various methods described above, such as methods for searching for blockchain data, can be executed by the CPU 601. For example, in some embodiments, the method 200 for searching blockchain data may be implemented as a computer software program tangibly embodied on a machine-readable medium, such as the storage unit 608. In some embodiments, part or all of the computer program may be loaded and / or installed on the device 600 via the ROM 602 and / or the communication unit 609. When a computer program is loaded into RAM 603 and executed by CPU 601, one or more actions or steps in method 200 described above may be performed.

In general, the various example embodiments of the invention may be implemented in hardware or special purpose circuits, software, firmware, logic, or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor, or other computing device. When aspects of embodiments of the invention are illustrated or described as a block diagram, a flowchart, or using some other graphical representation, it will be understood that the blocks, devices, systems, techniques, or methods described herein may serve as non-limiting examples. Implemented in hardware, software, firmware, dedicated circuitry or logic, general-purpose hardware or controllers, or other computing devices, or some combination thereof.

The computer-readable program instructions or computer program products used to execute the various aspects of the present invention can also be stored in the cloud. When it is required to be called, the user can access the stored cloud for execution through the mobile Internet, fixed network or other networks. The computer-readable program instructions of an aspect of the present invention implement the technical solutions disclosed according to the various aspects of the present invention.

It should be noted that although several devices or sub-devices of the device are mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to an embodiment of the present invention, the features and functions of the two or more devices described above may be embodied in one device. Conversely, the features and functions of one device described above can be further divided into specificization by multiple devices.

The above description is only an optional embodiment of the present invention, and is not intended to limit the embodiment of the present invention. For those skilled in the art, the embodiment of the present invention may have various modifications and changes. Any modification, equivalent replacement, and improvement made within the spirit and principle of the embodiments of the present invention shall be included in the protection scope of the embodiments of the present invention.

Although the embodiments of the present invention have been described with reference to several specific embodiments, it should be understood that the embodiments of the present invention are not limited to the specific embodiments disclosed. The embodiments of the present invention are intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims

A method for searching blockchain data, the method includes:

A. receiving a webpage read request via a hypertext transfer protocol interface, where the webpage read request includes a first uniform resource location address and first time information;

B. Determine whether an index associated with the first uniform resource location address exists in the cache, wherein the cache stores one or more indexes retrieved within a predetermined period of time, each index including the retrieved uniform resource A positioning address, a webpage associated with the uniform resource positioning address, and second time information;

C1. An index associated with the first uniform resource location address exists in the cache, and if the first time information is earlier than the second time information in the index, via the The hypertext transfer protocol interface returns a webpage associated with the first uniform resource location address.
The method according to claim 1, further comprising:

C2. When an index associated with the first uniform resource location address exists in the cache and the first time information is equal to the second time information in the index, transmitted via the hypertext The protocol interface returns an identifier indicating that the web page has not been modified.
The method according to claim 1, further comprising:

D11. Determine the blockchain data at the corresponding unified resource location address in the blockchain based on the unified resource location address stored in each index;

D12: comparing the blockchain data with data corresponding to a webpage stored in the index to determine whether the blockchain data at the uniform resource location address is updated;

D13. In the case where the blockchain data at the uniform resource location address is updated, the webpage associated with the uniform resource location address is updated in the index to be generated based on the updated blockchain data A webpage, and updates the second time information to the update time of the blockchain data.
The method according to claim 1, further comprising:

D21. Determine the blockchain data at the corresponding unified resource location address in the blockchain based on the unified resource location address stored in each index;

D22. Compare the modification time information of the blockchain data with the second time information in the index to determine whether the blockchain data at the uniform resource location address is updated;

D23. In the case that the modification time information of the blockchain data is later than the second time information in the index, the webpage associated with the uniform resource location address is updated in the index to be based on the updated A webpage generated by the blockchain data, and updating the second time information to an update time of the blockchain data.
The method according to claim 1, wherein the webpage read request further comprises a first indicator indicating that a difference webpage is allowed to be returned, and each index in the cache further includes one or more difference webpages and a separate comparison with each The time period information corresponding to a difference webpage, the method further includes:

E1. Determine the blockchain data at the corresponding unified resource location address in the blockchain based on the unified resource location address stored in each index;

E2. Compare the blockchain data with data corresponding to a webpage stored in the index to determine whether the blockchain data at the uniform resource location address is updated;

E3. When the blockchain data at the uniform resource location address in the index is updated, use the data difference between the updated blockchain data and the data corresponding to the webpage stored in the index Generating a corresponding difference webpage, and using the second time information and the update time of the blockchain data as the time period information corresponding to the difference webpage;

E4. Updating the webpage associated with the uniform resource location address to a webpage generated according to the updated blockchain data, and updating the second time information to the update time of the blockchain data.
The method according to claim 5, wherein an index associated with the first uniform resource location address exists in the cache and the first time information is earlier than the second time information in the index In the case, the method further includes:

F1. Determine whether a first indicator exists in the received webpage reading request;

F2. In the case where the first indicator exists in the received webpage read request, based on the time difference between the first time information and the second time information, it is determined that the time difference exists in the cache and the time difference When the corresponding one or more difference webpages are returned, one or more of the difference webpages corresponding to the time difference are returned via the hypertext transfer protocol interface.
The method according to claim 1, further comprising:

C31. When there is no index associated with the first uniform resource location address in the cache, obtain first blockchain data at the first uniform resource location address;

C32. Determine whether there is at least one second uniform resource location address, wherein the second blockchain data at the at least one second uniform resource location address is associated with the first blockchain data;

C33. In the case where the at least one second uniform resource location address exists, generating the association with the first uniform resource location address according to the first blockchain data and the at least one second uniform resource location address Web pages; and

C34. A webpage associated with the first uniform resource location address is returned via the hypertext transfer protocol interface.
The method according to claim 7, wherein after returning a webpage associated with the first uniform resource location address via the hypertext transfer protocol interface in the step C34, the method further comprises:

C35. The first uniform resource location address, a webpage associated with the first uniform resource location address, and the second time information are stored in the cache as an index.
The method according to claim 7, wherein the method further comprises:

When the at least one second uniform resource location address does not exist, a webpage associated with the first uniform resource location address is generated according to the first blockchain data.
The method according to claim 7, wherein determining whether there is at least one second uniform resource location address in step C32 further comprises:

Determining whether the at least one second uniform resource location address exists according to a hierarchical attribute included in the first blockchain data and a predetermined hierarchical relationship tree.
The method according to claim 7, wherein obtaining the first blockchain data at the first uniform resource location address in step C31 further comprises:

Determining whether to obtain the first blockchain data at the first uniform resource location address according to the ledger storage location of the first blockchain data,

Wherein, in a case where the first blockchain data or the second blockchain data is public data, the first blockchain data or the second blockchain data is stored in a public ledger; And in a case where the first blockchain data or the second blockchain data is private data, the first blockchain data or the second blockchain data is stored in a privacy ledger;

In a case where the first blockchain data is stored in the public ledger, the first blockchain data at the first uniform resource location address is acquired.
The method according to claim 7, wherein obtaining the first blockchain data at the first uniform resource location address in step C31 further comprises:

Determining whether to obtain the first blockchain data at the first uniform resource location address according to the storage area location of the first blockchain data,

Wherein, in a case where the first blockchain data or the second blockchain data is public data, the first blockchain data or the second blockchain data is stored in a public area of a ledger Medium; and in the case where the first blockchain data or the second blockchain data is privacy data, the first blockchain data or the second blockchain data is stored in the privacy of the ledger Area

In a case where the first blockchain data is stored in a public area of the ledger, the first blockchain data at the first uniform resource location address is acquired.
The method according to claim 7, wherein the first blockchain data and / or the second blockchain data includes a first attribute, and wherein in step C31, the first unified The first blockchain data at the resource location address further includes:

When the first attribute of the first blockchain data indicates that the first blockchain data is public data, the first blockchain data at the first uniform resource location address is obtained.
The method according to any one of claims 1 to 13, wherein the cache is set in a search node of the blockchain so that the search node can execute The method described above for searching blockchain data.
A device for searching blockchain data, the device includes:

Processor; and

A memory for storing instructions that, when executed, cause the processor to perform the following operations:

A. receiving a webpage read request via a hypertext transfer protocol interface, where the webpage read request includes a first uniform resource location address and first time information;

B. Determine whether an index associated with the first uniform resource location address exists in the cache, wherein the cache stores one or more indexes retrieved within a predetermined period of time, each index including the retrieved uniform resource A positioning address, a webpage associated with the uniform resource positioning address, and second time information;

C1. An index associated with the first uniform resource location address exists in the cache, and if the first time information is earlier than the second time information in the index, via the The hypertext transfer protocol interface returns a webpage associated with the first uniform resource location address.
The device according to claim 15, wherein the execution of the instructions further causes the processor to perform the following operations:

C2. When an index associated with the first uniform resource location address exists in the cache and the first time information is equal to the second time information in the index, transmitted via the hypertext The protocol interface returns an identifier indicating that the web page has not been modified.
The device according to claim 15, wherein the execution of the instructions further causes the processor to perform the following operations:

D11. Determine the blockchain data at the corresponding unified resource location address in the blockchain based on the unified resource location address stored in each index;

D12: comparing the blockchain data with data corresponding to a webpage stored in the index to determine whether the blockchain data at the uniform resource location address is updated;

D13. In the case where the blockchain data at the uniform resource location address is updated, the webpage associated with the uniform resource location address is updated in the index to be generated based on the updated blockchain data A webpage, and updates the second time information to the update time of the blockchain data.
The device according to claim 15, wherein the execution of the instructions further causes the processor to perform the following operations:

D21. Determine the blockchain data at the corresponding unified resource location address in the blockchain based on the unified resource location address stored in each index;

D22. Compare the modification time information of the blockchain data with the second time information in the index to determine whether the blockchain data at the uniform resource location address is updated;

D23. In the case that the modification time information of the blockchain data is later than the second time information in the index, the webpage associated with the uniform resource location address is updated in the index to be based on the updated A webpage generated by the blockchain data, and updating the second time information to an update time of the blockchain data.
The device according to claim 15, wherein the webpage read request further comprises a first indicator indicating that a difference webpage is allowed to be returned, and each index in the cache further includes one or more difference webpages and a connection with each The time period information corresponding to a difference webpage, when the instruction is executed, also causes the processor to perform the following operations:

E1. Determine the blockchain data at the corresponding unified resource location address in the blockchain based on the unified resource location address stored in each index;

E2. Comparing the blockchain data with data corresponding to a webpage stored in the index to determine whether the blockchain data at the uniform resource location address is updated;

E3. When the blockchain data at the uniform resource location address in the index is updated, use the data difference between the updated blockchain data and the data corresponding to the webpage stored in the index Generating a corresponding difference webpage, and using the second time information and the update time of the blockchain data as the time period information corresponding to the difference webpage;

E4. Updating the webpage associated with the uniform resource location address to a webpage generated according to the updated blockchain data, and updating the second time information to the update time of the blockchain data.
The device according to claim 19, wherein an index associated with the first uniform resource location address exists in the cache and the first time information is earlier than the second time information in the index In the case of execution, the instruction further causes the processor to perform the following operations:

F1. Determine whether a first indicator exists in the received webpage reading request;

F2. In the case where the first indicator exists in the received webpage read request, based on the time difference between the first time information and the second time information, it is determined that the time difference exists in the cache and the time difference When the corresponding one or more difference webpages are returned, one or more of the difference webpages corresponding to the time difference are returned via the hypertext transfer protocol interface.
The device according to claim 15, wherein the execution of the instructions further causes the processor to perform the following operations:

C31. When there is no index associated with the first uniform resource location address in the cache, obtain first blockchain data at the first uniform resource location address;

C32. Determine whether there is at least one second uniform resource location address, wherein the second blockchain data at the at least one second uniform resource location address is associated with the first blockchain data;

C33. In the case where the at least one second uniform resource location address exists, generating the association with the first uniform resource location address according to the first blockchain data and the at least one second uniform resource location address Web pages; and

C34. A webpage associated with the first uniform resource location address is returned via the hypertext transfer protocol interface.
The device according to claim 21, wherein after returning a web page associated with the first uniform resource location address via the hypertext transfer protocol interface in the step C34, the instruction further causes the The processor does the following:

C35. The first uniform resource location address, a webpage associated with the first uniform resource location address, and the second time information are stored in the cache as an index.
The device according to claim 21, wherein the execution of the instructions further causes the processor to perform the following operations:

When the at least one second uniform resource location address does not exist, a webpage associated with the first uniform resource location address is generated according to the first blockchain data.
The device according to claim 21, wherein determining in step C32 whether there is at least one second uniform resource location address further comprises:

Determining whether the at least one second uniform resource location address exists according to a hierarchical attribute included in the first blockchain data and a predetermined hierarchical relationship tree.
The device according to claim 21, wherein the acquiring the first blockchain data at the first uniform resource location address in step C31 further comprises:

Determining whether to obtain the first blockchain data at the first uniform resource location address according to the ledger storage location of the first blockchain data,

Wherein, in a case where the first blockchain data or the second blockchain data is public data, the first blockchain data or the second blockchain data is stored in a public ledger; And in a case where the first blockchain data or the second blockchain data is private data, the first blockchain data or the second blockchain data is stored in a privacy ledger;

In a case where the first blockchain data is stored in the public ledger, the first blockchain data at the first uniform resource location address is acquired.
The device according to claim 21, wherein the acquiring the first blockchain data at the first uniform resource location address in step C31 further comprises:

Determining whether to obtain the first blockchain data at the first uniform resource location address according to the storage area location of the first blockchain data,

Wherein, in a case where the first blockchain data or the second blockchain data is public data, the first blockchain data or the second blockchain data is stored in a public area of a ledger Medium; and in the case where the first blockchain data or the second blockchain data is privacy data, the first blockchain data or the second blockchain data is stored in the privacy of the ledger Area

In a case where the first blockchain data is stored in a public area of the ledger, the first blockchain data at the first uniform resource location address is acquired.
The device according to claim 21, wherein the first blockchain data and / or the second blockchain data includes a first attribute, and wherein in step C31, the first unified The first blockchain data at the resource location address further includes:

When the first attribute of the first blockchain data indicates that the first blockchain data is public data, the first blockchain data at the first uniform resource location address is obtained.
The device according to any one of claims 15 to 27, wherein the device is provided in a search node of the blockchain, and the search node includes the cache, so that the search node can implement Operation of the device for searching blockchain data according to any one of claims 15 to 27.
A computer-readable storage medium having computer-readable program instructions stored thereon, the computer-readable program instructions for executing the method for searching a blockchain according to any one of claims 1 to 14. Data methods.