WO2021143061A1 - Blockchain node access method, apparatus and system, and storage medium - Google Patents

Abstract

The present application relates to the technical field of blockchains. Provided are a blockchain node access method, apparatus and system, and a computer-readable storage medium. The method comprises: according to an acquired user access request, a domain name resolution service library analyzing the stability of target alliance chain nodes, and according to an analysis result, screening out preselected nodes from the target alliance chain nodes; compiling statistics on loads of the preselected nodes, and screening out the optimal node from the preselected nodes; according to the actual IP address of the optimal node, acquiring a secondary domain name of the optimal node and a specified IP address thereof; and outputting the secondary domain name of the optimal node and the specified IP address thereof from the domain name resolution service library. In the present application, a preset domain name resolution service library is taken as a public basic domain name resolution service of a blockchain, and can be reused by any blockchain, thereby effectively improving the access efficiency of a blockchain node.

Description

Block chain node access method, device, system and storage medium

This application requires the priority of the patent application whose application number is 202010032340.8, the application date is January 13, 2020, and the invention and creation title is "Blockchain Node Access Method, Device, and Storage Medium".

Technical field

This application relates to the field of blockchain technology, and in particular to a method, device, system and computer-readable storage medium for accessing blockchain nodes.

Background technique

Blockchain is a new application mode of computer technology such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithm.

During the process of accessing blockchain nodes, the inventor realized that the current blockchain service was filed and reviewed by the Central Network Security and Information Committee Office by the consortium chain, and the respective owners of the services provided services based on applying for their respective service domain names. Therefore, users need to interact with the blockchain according to their respective service domain names, or even IPs. For example, in Ethereum, we specify the domain name or IP, contract address, and contract parameters to initiate transactions and call blockchain services. For example, A blockchain is a bank alliance chain, which can provide services to all parties or individuals in the alliance after filing, but in fact the main body of the service is not the alliance, but the nodes owned by each independent organization in the alliance.

The consortium chain is filed as a whole, but users need to access the blockchain services of the consortium chain according to the standards of different service providers. This usage method is very unreasonable. The current blockchain services lack basic public services.

Summary of the invention

Based on the above-mentioned problems in the prior art, this application provides a method, device, and computer-readable storage medium for accessing blockchain nodes, the main purpose of which is to access the target consortium chain in the user request information through the domain name resolution service database. Analyze the stability and load situation of the nodes under the first-level domain name, select the best node, and obtain the second-level domain name of the best node and its corresponding from the domain name resolution service database according to the actual IP address of the best node. The domain name resolution database has pre-stored the first-level domain name used to express the alliance chain, the second-level domain name used to express the nodes of the alliance chain, and the designated IP address corresponding to the second-level domain name. Regarding the domain name resolution service library as the public basic domain name resolution service of the blockchain, any blockchain can be reused, effectively improving the access efficiency of blockchain nodes.

In the first aspect, this application provides a method for accessing blockchain nodes, which includes:

According to the obtained user access requests, the domain name resolution service library analyzes the stability of the target alliance chain nodes, and according to the analysis results, filters out preselected nodes from the target alliance chain nodes, among which,

The user access request includes the first-level domain name of the target alliance chain, the first-level domain name is used to express the alliance chain, and the domain name resolution service database includes: the first-level domain name, the second-level domain name, and the designation corresponding to the second-level domain name IP address, where the second-level domain name is used to describe the alliance chain node;

Performing statistics on the load of the pre-selected nodes, and selecting the best node from the pre-selected nodes;

Obtaining the second-level domain name of the best node and its designated IP address according to the actual IP address of the best node;

The second-level domain name of the best node and its designated IP address are output from the domain name resolution service database.

In a second aspect, the present application also provides an electronic device, the electronic device includes: a memory, a processor, the memory stores a blockchain node access program, the blockchain node access program is executed by the processor When implementing the following steps:

According to the obtained user access requests, the domain name resolution service library analyzes the stability of the target alliance chain nodes, and according to the analysis results, filters out preselected nodes from the target alliance chain nodes, among which,

The user access request includes the first-level domain name of the target alliance chain, the first-level domain name is used to express the alliance chain, and the domain name resolution service database includes: the first-level domain name, the second-level domain name, and the designation corresponding to the second-level domain name IP address, where the second-level domain name is used to describe the alliance chain node;

Performing statistics on the load of the pre-selected nodes, and selecting the best node from the pre-selected nodes;

Obtaining the second-level domain name of the best node and its designated IP address according to the actual IP address of the best node;

The second-level domain name of the best node and its designated IP address are output from the domain name resolution service database.

In the third aspect, this application also provides a blockchain node access system, including:

The pre-selected node screening unit is used to analyze the stability of the target alliance chain node according to the obtained user access request and the domain name resolution service library, and filter out the pre-selected node from the target alliance chain node according to the analysis result;

An optimal node screening unit, configured to perform statistics on the load of the preselected nodes, and select the optimal node from the preselected nodes;

A second-level domain name obtaining unit, configured to obtain the second-level domain name of the best node and its designated IP address according to the actual IP address of the best node;

The output unit is used to output the second-level domain name of the best node and its designated IP address from the domain name resolution service database.

In a fourth aspect, this application also provides a computer-readable storage medium in which a blockchain node access program is stored. When the blockchain node access program is executed by a processor, the above Any step in the block chain node access method described above.

The blockchain node access method, device, and computer-readable storage medium proposed in this application use the preset domain name resolution service library to access the nodes under the first-level domain name of the target alliance chain in the user request information through the domain name resolution service library. The stability and load situation are analyzed, the best node is selected, and the second-level domain name and corresponding IP address of the best node are obtained from the domain name resolution service database according to the actual IP address of the best node. Among them, domain name resolution The first-level domain name used to express the alliance chain, the second-level domain name used to express the nodes of the alliance chain, and the designated IP address corresponding to the second-level domain name are pre-stored in the database. Regarding the domain name resolution service library as the public basic domain name resolution service of the blockchain, any blockchain can be reused, effectively improving the access efficiency of blockchain nodes.

Description of the drawings

Figure 1 is a flowchart of a preferred embodiment of a method for accessing blockchain nodes in this application

2 is a schematic diagram of the application environment of the preferred embodiment of the method for accessing blockchain nodes of this application;

3 is a schematic diagram of modules of a preferred embodiment of the block chain node access program in FIG. 2;

Fig. 4 is a block diagram of the logical structure of a blockchain node access system according to an embodiment of the application.

The realization, functional characteristics, and advantages of the purpose of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application.

In the following description, for illustrative purposes, in order to provide a comprehensive understanding of one or more embodiments, many specific details are set forth. However, it is obvious that these embodiments can also be implemented without these specific details.

The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Example 1

In order to illustrate the blockchain node access method provided by this application, FIG. 1 shows the flow of a preferred embodiment of the blockchain node access method according to an embodiment of the present application.

As shown in Figure 1, the blockchain node access method provided by the present application includes: step S10-step S40.

Step S10: According to the obtained user access request, the domain name resolution service library analyzes the stability of the target alliance chain node, and according to the analysis result, selects the preselected node from the target alliance chain node;

The user access request includes the first-level domain name of the target alliance chain, the first-level domain name is used to express the alliance chain, and the domain name resolution service database includes: the first-level domain name, the second-level domain name, and the designated IP address corresponding to the second-level domain name. The second-level domain name is used to describe the nodes of the alliance chain.

Specifically, after the consortium chain is filed and reviewed with the Central Network Security and Information Committee Office, all the link information of the consortium chain is synchronized to the preset repository to obtain the domain name resolution service database. Among them, the link information of the consortium chain At least include: the first-level domain name used to express the alliance chain, the second-level domain name used to express the nodes of the alliance chain, and the designated IP address corresponding to the second-level domain name. The designated IP address refers to the domain name stored in the filing Resolve the real-time IP address of the node of the service library.

The user sends a user access request to the blockchain from the user end, such as a browser, where the user access request includes at least the first-level domain name of the target consortium chain, that is, the first-level domain name of the consortium chain that the user wants to access. Domain name resolution service According to the first-level domain name of the target alliance chain, the library analyzes the stability of each node in the alliance chain, and filters out preselected nodes from the target alliance chain nodes.

Among them, according to the obtained user access request, the domain name resolution service library analyzes the stability of the target alliance chain node, and according to the analysis result, the steps of screening the preselected node from the target alliance chain node include:

The domain name resolution service library collects the heartbeat information of the alliance chain nodes in real time, and records the actual IP address of the node corresponding to the heartbeat information;

According to the heartbeat information of the alliance chain nodes, calculate the average value of the stable values of the nodes under the first-level domain name of the target alliance chain;

According to the average value of the stable value of the node, the pre-selected node that meets the preset stability threshold is selected from the target alliance chain nodes.

Specifically, the domain name resolution service library collects the heartbeat information of the alliance chain nodes in real time, and records the actual IP address of the node corresponding to the heartbeat information of each node, so that the corresponding node can be found from the domain name resolution service library according to the actual IP address of the node. According to the second-level domain name of the node, the designated IP address corresponding to the second-level domain name of the node is obtained. Wherein, the actual IP address is the IP address corresponding to the node when the node's heartbeat information is obtained.

Wherein, preferably, the domain name resolution service library collects the heartbeat information of the alliance chain node in real time through HTTP request, and obtains the actual IP address of the node through the protocol header.

Among them, according to the heartbeat information of the alliance chain nodes, the steps of calculating the average value of the stable values of the nodes under the first-level domain name of the target alliance chain include:

Obtain the heartbeat value of the alliance chain node in a period of time according to the preset time interval;

Through the node stability calculation formula, calculate the stable value between every two adjacent heartbeat values of each node under the first-level domain name of the target alliance chain, and each node obtains N stable values;

According to the N stable values obtained by each node, the average value of the stable values of each node under the first-level domain name of the target alliance chain is calculated.

Specifically, the preset time interval can be set according to the actual situation. For example, the heartbeat value of the alliance chain node is obtained every 5 seconds, the heartbeat value of 1 minute is continuously obtained, and then the target alliance chain is calculated by the node stability calculation formula The stable value between every two adjacent heartbeat values of each node under the first-level domain name. At this time, each node gets N stable values. Taking the above as an example, each node gets 11 stable values in 1 minute. After adding up the 11 stable values, find the average value of the stable values.

Among them, the node stability calculation formula is:

S=S0+V,

V=(T2-T1)/P;

Among them, S0 is the stable value between the previous two adjacent heartbeat values, its initial value is 0, V is the stable value change value, where T2 is the current heartbeat arrival time, T1 is the last heartbeat arrival time, and P is the preset Time interval; among them, the value rule of V is:

When V≤0, the value of V is 0;

When 0<V≤1, the value of V is 1;

When 1<V<2, the value of V is -1

When V≥2, the value of V is -(V-1).

Specifically, in order to better understand the node stability calculation formula, an example is as follows:

Get the heartbeat value of the node within a period of time:

Heartbeat value 1-hbmsg-20190819.16.41.0;

Heartbeat value 2-hbmsg-20190819.16.41.5;

Heartbeat value 3-hbmsg-20190819.16.41.10;

Heartbeat value 4-hbmsg-20190819.16.41.15;

Heartbeat value 5-hbmsg-20190819.16.41.25;

The preset time interval is 5 seconds.

Then, the stable value between the heartbeat value 1 and the heartbeat value 2 is: S12=0+V1, V1=(5-0)/5=1, according to the value rule of V, the value of V1 is 1, then, S12 =0+1=1;

The stable value between heartbeat value 2 and heartbeat value 3 is: S23=S12+V2, V2=(10-5)/5=1, according to the value rule of V, the value of V2 is 1, then, S23=1 +1=2;

The stable value between heartbeat value 3 and heartbeat value 4 is: S34=S23+V3, V3=(15-10)/5=1, according to the value rule of V, the value of V3 is 1, then, S12=2 +1=3;

The stable value between heartbeat value 4 and heartbeat value 5 is: S45=S34+V4, V4=(25-15)/5=2, according to the value rule of V, the value of V4 is -1, then S45= 3-1=2.

Among them, in order that the second-level domain name and its designated IP address of the node parsed from the domain name resolution service database are unique, the first-level domain name, the second-level domain name, and the designated IP address corresponding to the second-level domain name are all unique.

Among them, according to the average value of the stable value of the node, the pre-selected node that meets the preset stability threshold is selected from the target alliance chain node, including:

The average value of the stability value of each node is compared with the preset stability threshold value, and the nodes under the first-level domain name of the target alliance chain whose average value of the stability value is greater than or equal to the preset stability threshold value are selected.

In step S20, the load of the preselected nodes is counted, and the best node is selected from the preselected nodes.

Specifically, if the load of a node is too much, it will affect the speed and stability of the node when it provides services. In order to provide users with better services, it is necessary to screen the pre-selected nodes. Each node of the alliance chain is Once the resolution is performed, it is recorded in the domain name resolution service database, and the preselected node is screened according to the recorded resolution times of the preselected node, and the preselected node with the least number of resolutions is selected as the best node.

Among them, the load of the pre-selected nodes is counted, and the steps of selecting the best node from the pre-selected nodes include:

Obtain the analysis frequency of the pre-selected node;

From the pre-selected nodes, the pre-selected node with the least frequency of analysis is selected as the best node.

In step S30, the second-level domain name of the best node and its designated IP address are obtained according to the actual IP address of the best node.

Specifically, after screening the pre-selected nodes whose node stability meets the preset stability threshold from the nodes under the first-level domain name of the target alliance chain and the best node with the least load from the pre-selected nodes, the collection is based on the domain name resolution service library. The actual IP address of the node obtained during the heartbeat information of the node, the second-level domain name of the best node is obtained from the domain name resolution service database, and then the designated IP address of the best node is obtained according to the second-level domain name of the best node. For example: the domain name resolution service library receives the heartbeat information of the node Pingan1, and the actual IP address of the node is 172.18.40.40. After stability analysis and load analysis, it is determined to be the best node, and then the best node The actual IP address of 172.18.40.70 obtains the second-level domain name of the best node and its corresponding designated IP address from the domain name resolution service database: for example: Pingan1.bankalliance.chain–172.18.40.70, among which, Pingan1.bankalliance. chain is the second-level domain name pre-stored in the domain name resolution service database, and 172.18.40.40 is the corresponding designated IP address.

Step S40, output the second-level domain name of the best node and its designated IP address from the domain name resolution service database.

Specifically, the second-level domain name of the best node obtained from the domain name resolution service library and its designated IP address are output from the domain name resolution service library and returned to the client, and the client receives the best node returned by the domain name resolution service library After entering the second-level domain name of the best node and its designated IP address, negotiate with the node service of the link by entering the second-level domain name of the best node and the corresponding IP address.

Among them, after outputting the second-level domain name of the best node and its designated IP address from the domain name resolution service database, it also includes:

According to the user's request information for the second-level domain name of the best node and its designated IP address, the second-level domain name of the best node and its designated IP address are analyzed and recorded.

By recording the analysis situation of the best node, it is convenient to perform statistics on the load of the preselected node when the next user visits.

Example 2

This application provides a method for accessing blockchain nodes, which is applied to an electronic device 1. Referring to FIG. 2, it is a schematic diagram of an application environment of a preferred embodiment of a method for accessing a blockchain node of this application.

In this embodiment, the electronic device 1 may be a terminal device with a computing function such as a server, a smart phone, a tablet computer, a portable computer, a desktop computer, and the like.

The electronic device 1 includes a processor 12, a memory 11, a network interface 13, and a communication bus 14.

The memory 11 includes at least one type of readable storage medium. The at least one type of readable storage medium may be a non-volatile storage medium such as flash memory, hard disk, multimedia card, card-type memory 11, and the like. In some embodiments, the readable storage medium may be an internal storage unit of the electronic device 1, for example, the hard disk of the electronic device 1. In other embodiments, the readable storage medium may also be the external memory 11 of the electronic device 1, such as a plug-in hard disk, a smart media card (SMC), and a secure digital (Secure Digital) equipped on the electronic device 1. , SD) card, flash card (Flash Card), etc.

In this embodiment, the readable storage medium of the memory 11 is generally used to store the blockchain node access program 10 installed in the electronic device 1, a preset domain name resolution service library, and the like. The memory 11 can also be used to temporarily store data that has been output or will be output.

In some embodiments, the processor 12 may be a central processing unit (CPU), a microprocessor, or other data processing chips, and is used to run program codes or process data stored in the memory 11, such as executing a blockchain. Node access program 10 and so on.

The network interface 13 may optionally include a standard wired interface and a wireless interface (such as a WI-FI interface), and is generally used to establish a communication connection between the electronic device 1 and other electronic devices.

The communication bus 14 is used to realize the connection and communication between the above-mentioned components.

FIG. 2 only shows the electronic device 1 with the components 11-14, but it should be understood that it is not required to implement all the illustrated components, and more or fewer components may be implemented instead.

In the device embodiment shown in FIG. 2, the memory 11 as a computer storage medium may include an operating system and a blockchain node access program 10; the processor 12 executes the blockchain node access program 10 stored in the memory 11. When realizing each step of the blockchain node access method in Embodiment 1, for example, as shown in Figure 1. Alternatively, the processor 12 implements the functions of the modules/units in the foregoing device embodiments when executing the blockchain node access method. For example, the blockchain node access program 10 shown in FIG. 3 can be divided into: a preselected node screening module 110 , The best node screening module 120, the second-level domain name acquisition module 130, and the output module 140.

The functions or operation steps implemented by the modules 110-140 are all similar to the above, and will not be described in detail here. Illustratively, for example, where:

Pre-selected node screening module 110: According to the obtained user access request, the domain name resolution service library analyzes the stability of the target alliance chain node, and according to the analysis result, selects the pre-selected node from the target alliance chain node. Among them, the user access request Including the first-level domain name of the target alliance chain. The first-level domain name is used for the alliance chain. The domain name resolution service library includes: the first-level domain name, the second-level domain name and the designated IP address corresponding to the second-level domain name. .

The optimal node screening module 120 is used to perform statistics on the load of the preselected nodes, and filter the optimal node from the preselected nodes.

The second-level domain name obtaining module 130: used to obtain the second-level domain name of the best node and its designated IP address according to the actual IP address of the best node.

Output module 140: used to output the second-level domain name of the best node and its designated IP address from the domain name resolution service database.

Example 3

Corresponding to the above method, the present application also provides a blockchain node access system, Figure 4 shows the logical structure of the blockchain node access system according to the best embodiment of the application.

As shown in FIG. 4, the present application provides a blockchain node access system 300, which includes: a pre-selected node screening unit 310, an optimal node screening unit 320, a second-level domain name obtaining unit 330, and an output unit 340. Among them, the implementation functions of the pre-selected node screening unit 310, the optimal node screening unit 320, the second-level domain name obtaining unit 330, and the output unit 340 correspond to the steps of the blockchain node access method in the embodiment one-to-one. To avoid repetition, this embodiment The examples are not detailed one by one.

The pre-selected node screening unit 310 is configured to analyze the stability of the target alliance chain node according to the obtained user access request and the domain name resolution service library, and filter out the pre-selected node from the target alliance chain node according to the analysis result;

The best node screening unit 320 is configured to perform statistics on the load of the preselected nodes, and filter the best nodes from the preselected nodes;

The second-level domain name obtaining unit 330 is configured to obtain the second-level domain name of the best node and its designated IP address according to the actual IP address of the best node;

The output unit 340 is configured to output the second-level domain name of the optimal node and its designated IP address from the domain name resolution service database.

Example 4

The embodiment of the present application also proposes a computer-readable storage medium. The computer-readable storage medium may be non-volatile or volatile; the computer-readable storage medium includes a blockchain node access program, When the block chain node access program is executed by the processor, the block chain node access method in Embodiment 1 is implemented. In order to avoid repetition, details are not repeated here. Or, when the computer program is executed by the processor, it realizes the function of the blockchain node accessing each module/unit in the system in Embodiment 4. In order to avoid repetition, it will not be repeated here.

The specific implementation of the computer-readable storage medium of the present application is substantially the same as the specific implementation of the above-mentioned blockchain node access method, electronic device, and system, and will not be repeated here.

It should be noted that in this article, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements not only includes those elements, It also includes other elements not explicitly listed, or elements inherent to the process, device, article, or method. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, device, article, or method that includes the element.

The serial numbers of the foregoing embodiments of the present application are for description only, and do not represent the superiority of the embodiments. Through the description of the above implementation manners, those skilled in the art can clearly understand that the above-mentioned embodiment method can be implemented by means of software plus the necessary general hardware platform, of course, it can also be implemented by hardware, but in many cases the former is better.的实施方式。 Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology can be embodied in the form of a software product, and the computer software product is stored in a storage medium (such as ROM/RAM) as described above. , Magnetic disk, optical disk), including several instructions to make a terminal device (can be a mobile phone, a computer, a server, or a network device, etc.) execute the method described in each embodiment of the present application.

The above are only the preferred embodiments of the application, and do not limit the scope of the patent for this application. Any equivalent structure or equivalent process transformation made using the content of the description and drawings of the application, or directly or indirectly applied to other related technical fields , The same reason is included in the scope of patent protection of this application.

Claims (20)

1. A method for accessing blockchain nodes is applied to an electronic device, wherein the method includes:

   According to the obtained user access requests, the domain name resolution service library analyzes the stability of the target alliance chain nodes, and according to the analysis results, filters out preselected nodes from the target alliance chain nodes, among which,

   The user access request includes the first-level domain name of the target alliance chain, the first-level domain name is used to express the alliance chain, and the domain name resolution service database includes: the first-level domain name, the second-level domain name, and the designation corresponding to the second-level domain name IP address, where the second-level domain name is used to describe the alliance chain node;

   Performing statistics on the load of the pre-selected nodes, and selecting the best node from the pre-selected nodes;

   Obtaining the second-level domain name of the best node and its designated IP address according to the actual IP address of the best node;

   The second-level domain name of the best node and its designated IP address are output from the domain name resolution service database.
2. The block chain node access method according to claim 1, wherein the domain name resolution service library analyzes the stability of the target alliance chain node according to the obtained user access request, and according to the analysis result, from the target alliance chain node The steps to filter out pre-selected nodes include:

   The domain name resolution service library collects heartbeat information of alliance chain nodes in real time, and records the actual IP address of the node corresponding to the heartbeat information;

   Calculating the average value of the stable values of the nodes under the first-level domain name of the target alliance chain according to the heartbeat information of the nodes of the alliance chain;

   According to the average value of the stability value of the node, a preselected node that meets the preset stability threshold is selected from the target alliance chain nodes.
3. The method for accessing a blockchain node according to claim 2, wherein the step of calculating the average value of the stable value of the node under the first-level domain name of the target alliance chain based on the heartbeat information of the alliance chain node include:

   Obtain the heartbeat value of the alliance chain node in a period of time according to the preset time interval;

   Calculate the stable value between every two adjacent heartbeat values of each node under the first-level domain name of the target alliance chain through the node stability calculation formula, and each node obtains N stable values;

   According to the N stable values obtained by each node, the average value of the stable values of each node under the first-level domain name of the target alliance chain is calculated.
4. The method for accessing blockchain nodes according to claim 2, wherein the node stability calculation formula is:

   S=S0+V,

   V=(T2-T1)/P;

   Among them, S0 is the stable value between the previous two adjacent heartbeat values, its initial value is 0, V is the stable value change value, where T2 is the current heartbeat arrival time, T1 is the last heartbeat arrival time, and P is the preset Time interval; among them, the value rule of V is:

   When V≤0, the value of V is 0;

   When 0<V≤1, the value of V is 1;

   When 1<V<2, the value of V is -1

   When V≥2, the value of V is -(V-1).
5. The method for accessing blockchain nodes according to claim 2, wherein the domain name resolution service library collects heartbeat information of alliance chain nodes in real time through HTTP requests.
6. The method for accessing blockchain nodes according to claim 5, wherein the domain name resolution service library obtains the actual IP address of the node corresponding to the heartbeat information through the protocol header of the HTTP request, and records the node corresponding to the heartbeat information The actual IP address.
7. The method for accessing blockchain nodes according to claim 2, wherein, according to the average value of the stable values of the nodes, selecting the pre-selected nodes that meet the preset stability threshold from the target alliance chain nodes includes:

   The average value of the stability value of each node is compared with the preset stability threshold value, and the average value of the stability value is selected to be greater than or equal to the preset stability threshold value of the first-level domain name of the target alliance chain Node.
8. The method for accessing blockchain nodes according to claim 1, wherein, according to the obtained user access request, the domain name resolution service library analyzes the stability of the target alliance chain node, and according to the analysis result, selects the target alliance chain node Before leaving the pre-selected node, it also includes:

   After the consortium chain is filed and reviewed with the Central Network Security and Information Committee Office, all the link information of the consortium chain is synchronized to the preset repository to obtain a domain name resolution service database.
9. The method for accessing blockchain nodes according to claim 8, wherein the designated IP address corresponding to the second-level domain name is stored to the Central Network Security and Information Commission after the consortium chain has filed and reviewed it with the Office of the Central Network Security and Information Commission The real-time IP address of the alliance chain node of the domain name resolution service library.
10. The method for accessing blockchain nodes according to claim 1, wherein the first-level domain name, the second-level domain name, and the designated IP address corresponding to the second-level domain name are all unique.
11. The method for accessing blockchain nodes according to claim 1, wherein the step of performing statistics on the load of the preselected nodes and selecting the best node from the preselected nodes comprises:

    Obtaining the analysis frequency of the preselected node;

    The preselected node with the least frequency of analysis is selected from the preselected nodes as the best node.
12. The method for accessing a blockchain node according to claim 1, wherein after outputting the second-level domain name of the optimal node and its designated IP address from the domain name resolution service database, the method further comprises:

    According to the user's access request information for the second-level domain name of the best node and its designated IP address, the second-level domain name of the best node and its designated IP address are analyzed and recorded.
13. An electronic device, wherein the electronic device comprises: a memory and a processor, and a blockchain node access program is stored in the memory. When the blockchain node access program is executed by the processor, the following steps are implemented:

    According to the obtained user access requests, the domain name resolution service library analyzes the stability of the target alliance chain nodes, and according to the analysis results, filters out preselected nodes from the target alliance chain nodes, among which,

    The user access request includes the first-level domain name of the target alliance chain, the first-level domain name is used to express the alliance chain, and the domain name resolution service database includes: the first-level domain name, the second-level domain name, and the designation corresponding to the second-level domain name IP address, where the second-level domain name is used to describe the alliance chain node;

    Performing statistics on the load of the pre-selected nodes, and selecting the best node from the pre-selected nodes;

    Obtaining the second-level domain name of the best node and its designated IP address according to the actual IP address of the best node;

    The second-level domain name and the designated IP address of the best node are output from the domain name resolution service database.
14. The electronic device according to claim 13, wherein the domain name resolution service library analyzes the stability of the target alliance chain node according to the obtained user access request, and selects the pre-selected node from the target alliance chain node according to the analysis result The steps include:

    The domain name resolution service library collects heartbeat information of alliance chain nodes in real time, and records the actual IP address of the node corresponding to the heartbeat information;

    Calculating the average value of the stable values of the nodes under the first-level domain name of the target alliance chain according to the heartbeat information of the nodes of the alliance chain;

    According to the average value of the stability value of the node, a preselected node that meets the preset stability threshold is selected from the target alliance chain nodes.
15. The electronic device according to claim 14, wherein the step of calculating the average value of the stable values of the nodes under the first-level domain name of the target alliance chain based on the heartbeat information of the alliance chain nodes comprises:

    Obtain the heartbeat value of the alliance chain node in a period of time according to the preset time interval;

    Calculate the stable value between every two adjacent heartbeat values of each node under the first-level domain name of the target alliance chain through the node stability calculation formula, and each node obtains N stable values;

    According to the N stable values obtained by each node, the average value of the stable values of each node under the first-level domain name of the target alliance chain is calculated.
16. 15. The electronic device according to claim 15, wherein the node stability calculation formula is:

    S=S0+V,

    V=(T2-T1)/P;

    Among them, S0 is the stable value between the previous two adjacent heartbeat values, its initial value is 0, V is the stable value change value, where T2 is the current heartbeat arrival time, T1 is the last heartbeat arrival time, and P is the preset Time interval; among them, the value rule of V is:

    When V≤0, the value of V is 0;

    When 0<V≤1, the value of V is 1;

    When 1<V<2, the value of V is -1

    When V≥2, the value of V is -(V-1).
17. The electronic device according to claim 14, wherein the domain name resolution service library collects heartbeat information of alliance chain nodes in real time through HTTP requests.
18. The electronic device according to claim 17, wherein the domain name resolution service library obtains the actual IP address of the node corresponding to the heartbeat information through the protocol header of the HTTP request, and records the actual IP address of the node corresponding to the heartbeat information .
19. A blockchain node access system, which includes:

    The pre-selected node screening unit is used to analyze the stability of the target alliance chain node according to the obtained user access request and the domain name resolution service library, and filter out the pre-selected node from the target alliance chain node according to the analysis result;

    An optimal node screening unit, configured to perform statistics on the load of the preselected nodes, and select the optimal node from the preselected nodes;

    A second-level domain name obtaining unit, configured to obtain the second-level domain name of the best node and its designated IP address according to the actual IP address of the best node;

    The output unit is used to output the second-level domain name of the best node and its designated IP address from the domain name resolution service database.
20. A computer-readable storage medium, wherein a block chain node access program is stored in the computer-readable storage medium, and when the block chain node access program is executed by a processor, it realizes any of claims 1 to 12 One of the steps of the block chain node access method.

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